U.S. patent application number 16/082533 was filed with the patent office on 2019-05-16 for camera module, and photosensitive component thereof and manufacturing method therefor.
The applicant listed for this patent is NINGBO SUNNY OPOTECH CO., LTD.. Invention is credited to Zhenyu CHEN, Zhen HUANG, Zhongyu LUAN, Takehiko TANAKA, Mingzhu WANG, Bojie ZHAO.
Application Number | 20190148429 16/082533 |
Document ID | / |
Family ID | 59850089 |
Filed Date | 2019-05-16 |
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United States Patent
Application |
20190148429 |
Kind Code |
A1 |
WANG; Mingzhu ; et
al. |
May 16, 2019 |
CAMERA MODULE, AND PHOTOSENSITIVE COMPONENT THEREOF AND
MANUFACTURING METHOD THEREFOR
Abstract
A camera module and photosensitive component or unit thereof and
manufacturing method therefor are provided. The photosensitive unit
includes an encapsulation portion and a photosensitive portion that
includes a main circuit board and a photosensitive sensor, wherein
the encapsulation portion is integrally encapsulated to form on the
main circuit board and the photosensitive sensor.
Inventors: |
WANG; Mingzhu; (Ningbo,
CN) ; ZHAO; Bojie; (Ningbo, CN) ; TANAKA;
Takehiko; (Ningbo, CN) ; LUAN; Zhongyu;
(Ningbo, CN) ; CHEN; Zhenyu; (Ningbo, CN) ;
HUANG; Zhen; (Ningbo, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
NINGBO SUNNY OPOTECH CO., LTD. |
Ningbo, Zhejiang |
|
CN |
|
|
Family ID: |
59850089 |
Appl. No.: |
16/082533 |
Filed: |
March 9, 2017 |
PCT Filed: |
March 9, 2017 |
PCT NO: |
PCT/CN2017/076041 |
371 Date: |
January 9, 2019 |
Current U.S.
Class: |
348/294 |
Current CPC
Class: |
H05K 1/118 20130101;
H04N 5/225 20130101; H01L 27/14698 20130101; H01L 23/10 20130101;
H01L 2224/83101 20130101; H01L 2224/92247 20130101; H01L 27/14621
20130101; H04N 5/2257 20130101; H01L 27/14618 20130101; H05K 1/0274
20130101; H01L 2224/83192 20130101; H04N 5/2253 20130101; H04N
5/2254 20130101; H01L 2924/16195 20130101 |
International
Class: |
H01L 27/146 20060101
H01L027/146; H05K 1/02 20060101 H05K001/02; H04N 5/225 20060101
H04N005/225; H05K 1/11 20060101 H05K001/11 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 12, 2016 |
CN |
201610142925.9 |
Mar 12, 2016 |
CN |
201610143457.7 |
Mar 12, 2016 |
CN |
201620191631.0 |
Mar 12, 2016 |
CN |
201620191969.6 |
Apr 1, 2016 |
CN |
201610202500.2 |
Apr 1, 2016 |
CN |
201620269534.9 |
Apr 28, 2016 |
CN |
201610278035.0 |
Apr 28, 2016 |
CN |
201620373323.X |
Jun 16, 2016 |
CN |
201610430615.7 |
Jun 16, 2016 |
CN |
201620590779.1 |
Claims
1-128. (canceled)
129. A photosensitive unit of a camera module, comprising: an
encapsulation portion; and a photosensitive portion, including a
main circuit board and a photosensitive sensor, wherein said
encapsulation portion is encapsulated to form on said main circuit
board and said photosensitive sensor and has a window defined by an
inclined inner wall of said encapsulation portion and positioned
above said photosensitive sensor to provide a light path of said
photosensitive sensor.
130. The photosensitive unit, as recited in claim 129, wherein said
window is a concave shaped window which is defined by said inclined
inner wall of said encapsulation portion.
131. The photosensitive unit, as recited in claim 130, wherein said
window of said encapsulation portion enlarges a size thereof from a
bottom thereof upwardly and gradually, having a smaller bottom size
and a larger top size, to form an inclined shape slope side.
132. The photosensitive unit, as recited in claim 129, further
comprising a connecting medium, wherein said photosensitive sensor
is attached on said main circuit board through said connecting
medium, said photosensitive sensor has a front side facing toward
outside and a back side facing toward said main circuit board,
wherein said connecting medium is deployed between said back side
of said photosensitive sensor and said main circuit board to affix
said photosensitive sensor on said main circuit board.
133. The photosensitive unit, as recited in claim 132, wherein said
photosensitive portion comprises at least one connecting element
which electrically connects said photosensitive sensor and said
main circuit board, wherein said photosensitive portion
encapsulates and wraps up said connecting element.
134. The photosensitive unit, as recited in claim 133, wherein said
photosensitive portion comprises an optical filter positioned above
said photosensitive sensor, wherein said encapsulation portion is
molded to form on said main circuit board, said photosensitive
sensor, and said optical filter.
135. The photosensitive unit, as recited in claim 133, wherein said
photosensitive portion comprises a reinforced layer, overlappedly
attached to the bottom of said main circuit board, so as to
reinforce the structural strength of said main circuit board.
136. The photosensitive unit, as recited in claim 135, wherein said
reinforced layer is a metal plate, so as to enhance the heat
dissipation of said photosensitive portion.
137. The photosensitive unit, as recited in claim 133, wherein said
photosensitive portion comprises a shielding layer, covering,
encapsulating, and wrapping up said main circuit board and at least
a side of said encapsulation portion, so as to enhance the
electromagnetic immunity of the photosensitive unit.
138. A camera module, comprising: at least a circuit board; at
least a camera lens; at least a protection frame; at least a
photosensitive sensor, comprising a photosensitive area and a
non-photosensitive area both provided thereon, wherein said
protection frame is protrudingly arranged on the periphery of said
photosensitive area of said photosensitive sensor. at least an
integrally encapsulated frame, arranged to cover and wrap up said
circuit board and said non-photosensitive area of said
photosensitive sensor, so as to integrate said integrally
encapsulated frame, said circuit board, and said photosensitive
sensor, wherein said camera lens is deployed along a photosensitive
path of said photosensitive sensor, wherein said photosensitive
sensor and said circuit board are connected and communicated with
each other.
139. The camera module, as recited in claim 138, wherein a size of
an inner side edge of said protection frame is equal to or larger
than a size of the photosensitive area of said photosensitive
sensor, wherein a size of an outer side edge of said protection
frame is equal to or smaller than a size of said photosensitive
sensor.
140. The camera module, as recited in claim 138, further comprising
a gluing layer, arranged between a periphery of said photosensitive
area of said photosensitive sensor and said protection frame, so as
to connect said protection frame and said periphery of said
photosensitive area of said photosensitive sensor through said
gluing layer.
141. The camera module, as recited in claim 138, further comprising
a camera lens support, arranged on said integrally encapsulated
frame, wherein said camera lens is arranged on said camera lens
support.
142. The camera module, as recited in claim 141, wherein said
camera lens support and said integrally encapsulated frame are
integrally formed.
143. The camera module, as recited in claim 141, wherein said
camera lens support is a motor unit, which is communicated and
connected with said circuit board.
144. The camera module, as recited in claim 141, further comprising
a filter which arranged on top of said integrally encapsulated
frame and positioned between said photosensitive sensor and said
camera lens.
145. A manufacturing method for a photosensitive unit, comprising
the steps of: (A) attaching a connecting medium in a semi-solid
state on the back side of a photosensitive sensor; (B) attaching
said photosensitive sensor on a main circuit board through said
connecting medium; (C) solidifying said connecting medium, so as to
flat and stably connect said photosensitive sensor and said main
circuit board; and (D) deploying at least a connecting element on
said photosensitive sensor and said main circuit board to
electrically connect said photosensitive sensor and said main
circuit board.
146. The manufacturing method, as recited in claim 145, wherein the
step (A) comprises the steps of: attaching said connecting medium
on a back side of a wafer; attaching a dicing tape on an outer side
of said connecting medium; semi-solidifying said connecting medium;
and dicing said wafer, so as to obtain said photosensitive sensor
carrying said semi-solidified connecting medium.
147. The manufacturing method, as recited in claim 145, wherein the
step (A) comprises the steps of: attaching said connecting medium
on a back side of a wafer; attaching a dicing tape on a front side
of said wafer; semi-solidifying said connecting medium; and dicing
said wafer, so as to obtain said photosensitive sensor carrying
said semi-solidified connecting medium.
148. The manufacturing method, as recited in claim 145, wherein the
step (A) comprises the steps of: attaching said connecting medium
on a dicing tape; semi-solidifying said connecting medium;
attaching said connecting medium on a wafer; and dicing said wafer,
so as to obtain said photosensitive sensor carrying said
semi-solidified connecting medium.
Description
CROSS REFERENCE OF RELATED APPLICATION
[0001] This is a U.S. National state non-provisional application
under 35 U.S.C. .sctn. 371 of the international application
PCT/CN2017/076041, international filing date Mar. 9, 2017, the
entire content of which is expressly incorporated herein by
reference.
NOTICE OF COPYRIGHT
[0002] A portion of the disclosure of this patent document contains
material which is subject to copyright protection. The copyright
owner has no objection to any reproduction by anyone of the patent
disclosure, as it appears in the United States Patent and Trademark
Office patent files or records, but otherwise reserves all
copyright rights whatsoever.
BACKGROUND OF THE PRESENT INVENTION
Field of Invention
[0003] The present invention relates to the field of camera module,
and more particularly to a camera module, and photosensitive
component or unit thereof and manufacturing method therefor.
Description of Related Arts
[0004] COB (Chip On Board, chip packaging) technique is a very
important technical process in the method of assembling and
producing camera module. A camera module produced by means of the
conventional COB technique is assembled of a circuit board, a
photosensitive sensor, a lens holder, a motor drive, and a camera
lens.
[0005] FIG. 1 refers to a perspective view of a camera module
produced by means of the conventional COB technique. The camera
module includes a circuit board 101P, a sensor 102P such as a
photosensitive chip, a frame 103P, an optical filter 104P, a motor
105P, and a camera lens 106P. The sensor 102P is installed on the
circuit board 101P. The optical filter 104P is installed on the
frame 103P. The camera lens 106P is installed in the motor 105P.
The motor 105P is installed on the frame 103P, so that the camera
lens 106P is positioned along a photosensitive path of the sensor
102P.
[0006] It is worth mentioning that there is often a plurality of
circuit components 1011P, such as resistors, capacitors, and etc.,
installed on the circuit board 101P. These circuit components 1011P
protrude from the surface of the circuit board 101P. However, the
frame 103P has to be mounted on the circuit board 101P with the
circuit components 1011P. According to the conventional COB
technology, there are disadvantages in the assembling and
coordination relationships among the circuit board 101P, the
circuit components 1011P, and the frame 103P, which also restrict
the development for the camera module to become lighter and
thinner.
[0007] It is also worth mentioning that the sensor 102P is usually
electrically connected with the circuit board 101P with conductive
elements such as gold wires 1021P for data transmission between the
sensor 102P and the circuit board 101P. Based on the feature and
structure of the gold wires 1021P, the gold wires 1021P are usually
curvedly bent and protruded from the surface of the circuit board
101P. Therefore, the assembling process of the sensor 102P, like
the circuit components 1011P, has the similar adverse effects to
the camera module.
[0008] In particular, firstly, the circuit components 1011P and the
gold wires 1021P are directly exposed on the surface of the circuit
board 101P. As a result, they will inevitably be affected during
the subsequent assembling processes, such as adhering the frame
103P, soldering the motor 105P, and etc., wherein solder resists,
dusts and etc. during the soldering process may easily stick to the
circuit components 1011P. Besides, because the circuit components
1011P and the sensor 102P are connected and provided in a common
space, those dusts and pollutants can easily and adversely affect
the sensor 102P that can result in undesirable occurrences such as
dark spots of the assembled camera module, which increases the
defective rate of the camera module.
[0009] Secondly, the conventional frame 103P is positioned at the
outer side around the circuit components 1011P. Therefore, to mount
the frame 103P on the circuit board 101P, a safe distance is
required to be reserved between the frame 103P and the circuit
components 1011P in both horizontal direction and upward direction,
that results in increasing the thickness of the camera module and
the difficulty to the thickness reduction of the camera model.
[0010] Thirdly, during the COB assembling process, the frame 103P
or the motor 105P is adhered on the circuit board 101P with
adhesive material, such as glue. During the adhering, an Active
Arrangement (AA) technique is usually required to adjust the
central axis lines of the sensor 102P and the camera lens 106P
being aligned coincidently in both horizontal and vertical
directions. Therefore, in order to satisfy the practice of the AA
technique, it is required to additionally provide more glue between
the frame 103P and the circuit board 101P as well as between the r
frame 103P and the motor 105P, so as to reserve adjustment space
between each other. Nevertheless, this adjustment space requirement
will not only further increase the thickness of the camera module,
rendering it substantially being more difficult to reduce the
thickness of the camera module, but also cause tilt discrepancy of
the assembling more easily during such multiple adhering process.
Moreover, it further requires a higher evenness for the lens holder
103P, circuit board 101P and motor 105P.
[0011] It is worth mentioning that the frame 103P is usually made
through injection molding technique. Due to the limitation in
material selection and manufacturing technique, the evenness and
flatness of the surface of the frame 103P itself are relatively
poor. As a result, the stability, evenness, and flatness of the
bonding between the frame 103P and the circuit board 101P are
relatively poor. Besides, the evenness and flatness of the
installing platform for other components, such as the motor unit
105P and/or camera lens 106P, provided by the frame 3P are also
poor. All of these factors will influence the final quality of the
camera module and the yield rate of the mass production.
[0012] In addition, in the conventional COB technology, the circuit
board 101P forms the basic affixing and supporting body for the
camera module, so that the circuit board 101P is required to have a
predetermined structural strength. This requirement makes the
circuit board 101P having a larger thickness, which also increases
the thickness of the camera module from another aspect.
[0013] Along with the development of all kinds of electronic
product and smart device, camera modules are also developed to
achieve higher performance and more compact size. Meanwhile, in
order to meet the various requirements of high performance
development, including high resolution and high image quality, more
and more electronic components are provided in the circuit, the
size and surface area of the sensor becomes larger and larger, and
the passive components, such as driving resistors and capacitors,
are correspondingly increased. As a result, the size of the
electronic device becomes larger and larger, the assemble
difficulty thereof increases accordingly, and the overall size of
the camera module becomes bigger and bigger. In view of the above
factors, the conventional assembling method of the lens holder,
circuit board, and circuit components becomes a great restriction,
to a certain extent, to the development of a lighter and thinner
camera module. As the demanding for camera module has dramatically
increased nowadays, its mass production has become a must. The ways
to improve the product performance and to increase the product
yield rate, which allows a technology to be actually put into
practical production activity, are both very significant and
meaningful for technology researchers and manufacturer of camera
module.
[0014] There are usually capacitors and plastic parts attached on
the encapsulated circuit board of the camera module of a
conventional phone. The capacitors and plastic parts are
independent, which do not spatially overlap. The plastic parts
serve for supporting. Such technical solution mainly has the
following issues:
[0015] 1. The plastic frame is formed alone and then bonded on the
circuit board through adhesive. Nonetheless, if the plastic frame
is not flat and smooth itself or is assembled with tilt, it will
render module tilt. 2. The resistance-capacitance components and
the photosensitive sensor all exist in the same space. Because
dusts on the resistance-capacitance components cannot be cleaned up
easily, it will eventually affect the module and cause dark spots
and defectives. 3. The structural strength is weak in circuit
board. 4. It is difficult to reduce the product size, especially
the lateral dimension thereof. It wastes the dimensions between two
camera modules and affects the overall dimensions.
[0016] In recent years, the trend of electronic device development
is heading toward expecting thinner and lighter devices, which,
especially, demand strictly on the height of the camera module
since it has serves as a standard layout of an electronic device.
In addition, customers demand higher and higher on the image
quality of the camera module. Hence, the ways to reduce the size of
the camera module and to enhance the image quality of the camera
module have become critical technical issues the camera module
industry focuses on recently.
[0017] Currently, the Molding On Chip (MOC) encapsulation
technology applied in the camera module industry has been
developed. The MOC encapsulation technology is to encapsulate the
photosensitive sensor and circuit together through an encapsulation
process of the camera module, so as to maximize the structural
strength of the camera module, minimize the size of the camera
module, and reduce the defectives rendered by dusts and etc.
Specifically speaking, according to a camera module manufacturing
process utilizing MOC encapsulation technology, it has to firstly
attach a photosensitive sensor on a circuit board and connected the
photosensitive sensor and the circuit board through gold wires.
Then the circuit board is put into a forming mold with the
photosensitive area of the photosensitive sensor facing toward the
forming mold. Next, it fills a molding material into the forming
mold to form a frame, such that the frame can integrally bond the
photosensitive sensor and the circuit board. Although this method
is positive in enhancing the structural strength of the camera
module and reducing the size of the camera module, such camera
module manufacturing process still has several issues.
[0018] First, the photosensitivity of the photosensitive sensor can
normally be enhanced through microlenses that match each pixel
element respectively. Because the microlenses are usually in a
micrometer scale, they can be damaged or scratched very easily.
Especially, the risk is even higher under high temperature and high
pressure. Any microlens of a regular photosensitive sensor being
damaged or scratched will inevitably affect the image quality of
the camera module. Next, the bonding and attachment of the
photosensitive sensor and the circuit board has a tolerance, which
will cause gap between the photosensitive sensor and the forming
mold as the forming mold is pressed on the non-photosensitive area
of the photosensitive sensor. When a molding material is filled
into the forming mold, the molding material will flow into the gap
between the photosensitive sensor and the forming mold and
eventually become burr of the frame formed by the molding material.
Because the temperature of the molding material is high, if the
molding material flows to the photosensitive area of the
photosensitive sensor, it will inevitably damage the microlenses on
the photosensitive area of the photosensitive sensor. Moreover, the
burr of the frame may also partially obstruct or shade the
photosensitive area of the photosensitive sensor and render
defective of the product.
[0019] The consistency of the photosensitive axis is a critical
factor that decides the image quality of the camera module. The
consistency of the photosensitive axis mainly refers to coaxiality
of the central axis of the photosensitive sensor and the main
photosensitive axis of the camera lens. Hence, the Die/Attach (D/A)
technique is an important procedure in the manufacturing and
assembling method for the camera module.
[0020] FIGS. 81A-81C illustrate chip and circuit board of
conventional camera through conventional D/A technology.
Conventionally, it usually attaches a chip 501P on a circuit board
502P, which is the D/A process. Namely, it applies thermosetting
conducting adhesive or insulation paste on the surface of the
circuit board 502P according to a specific shape, such as
dispensing points, crosses. Then, the chip 501P will be attached on
the circuit board 502P. It utilizes the pressing operation in the
attaching process to spread out the adhesive and bond the chip
501P. Lastly, it utilizes heating and roasting to dry and solidify
the adhesive, so as to affix the chip 501P on the surface of the
circuit board 502P
[0021] It can be obviously noted that the circuit board 502P and
the chip 501P can be bonded in the adhering process that the glue
colloid 503P is painted on the circuit board 502P and the chip 501P
thereon is then pressed. Accordingly, it should not have too much
glue colloid 503P applied on the circuit board 502P, so as to avoid
making excessive glue colloid 503P and having it overflowed from
the side edge of the circuit board, which can contaminate the
circuit board 502P or the chip 501P. In other words, it is
difficult to control both the amount and shape of the glue colloid
503P in this process. It usually applies less glue colloid 503P
according to a predetermined shape, so as to ensure that the glue
colloid will not overflow from the edge of the chip 501P. Because
there is less glue colloid 503P preset on the circuit board 502P,
the bonding result turns out that there is an overhanging space
504P created in the fringe area between the chip 501P and the
circuit board 502P. Moreover, the overhanging space 504P is usually
all around. The presence of the overhanging space 504P is likely to
cause the chip 501P tilt, such as the included angle
.theta..degree. between the chip 501P and the circuit board 502P as
illustrated in FIG. 81B. Besides, distribution of the glue colloid
503P after pressing is usually not even, flat, and smooth, which
deviation is often around 20 .mu.m. All these conditions affect the
consistency of the photosensitive axis of the optical system and
the image quality of the camera module. In addition, the bonding
stability of the chip 501P and the circuit board 502P in this way
is relatively poor. In other words, the chip 501P can easily be
separated from the circuit board 502P due to external force, which
is not quite reliable.
[0022] Further, referring to FIG. 81C, the Molding On Chip (MOC)
technique is a recently developed and important chip assembling
technique. Its main procedures include attaching the chip 501P on
the circuit board 502P, bonding the wire 505P, and molding a
molding frame 506P on the circuit board 502P and the chip 501P, so
as to moldingly encapsulate the connecting area of the circuit
board 502P and the fringe of the chip 501P. When it is moldingly
forming the molding frame 506P, the fringe of the chip 501P has to
bear the pressing of the mold and there will be an overhanging
space 504P occurring between the circuit board 502P and the chip
501P as the conventional D/A technique is utilized. Consequently,
such pressing is likely to make the chip 501P tilt or even crack
the fringe of the chip 501P due to uneven stress. In order to
ensure a better consistency of the photosensitive axis and
reliability of the chip, it may require a flat and smooth bonding
between the chip and the circuit board as well as a more accurate
pressing process of the molding technique. Unfortunately, it still
cannot completely solve the problems, such as inconsistency of the
photosensitive axis, poor resolution, abnormal image curve, error
code of the motor brought by conventional D/A technique for the
camera module.
SUMMARY OF THE PRESENT INVENTION
[0023] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the photosensitive unit includes an encapsulation
portion and a photosensitive portion. The encapsulation portion is
encapsulated to form on the photosensitive portion.
[0024] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the encapsulation portion is integrally formed on
the photosensitive portion, so as to provide a flat and smooth
installing surface.
[0025] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the photosensitive portion of the photosensitive
unit includes a sensor and a main circuit board. The sensor
electrically connects to the main circuit board through at least a
connecting element and the encapsulation portion of the
photosensitive unit wraps up the connecting element to prevent it
from being directly exposed to the outside.
[0026] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the connecting elements are integrally enclosed,
encapsulated and/or wrapped up in the encapsulation portion through
a molding manufacturing process.
[0027] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the photosensitive unit includes at least one
circuit element. The circuit element is enclosed, encapsulated
and/or wrapped up in the encapsulation portion, so as to prevent it
from being directly exposed to the outside.
[0028] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the circuit element is integrally enclosed,
encapsulated and/or wrapped up in the encapsulation portion through
a molding manufacturing process.
[0029] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the sensor of the photosensitive unit has a
photosensitive portion and a non-photosensitive portion. The
non-photosensitive portion of the sensor is molded by the
encapsulation portion to reduce the size of the photosensitive unit
and the assembled camera module.
[0030] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the main circuit board has at least an inner
groove and the sensor of the photosensitive unit is installed in
the inner groove, so as to reduce a height of the encapsulation
portion as demanded.
[0031] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the encapsulation portion includes an enclosure
section and an optical filter installation section, wherein the
installation section is integrally connected with enclosure section
by molding, wherein the installation section is adapted to install
an optical filter so that no additional optical filter mounting
frame is required.
[0032] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the encapsulation portion comprises a camera lens
installing section, integrally and upwardly extended thereon, so as
to be adapted for installing a camera lens therein.
[0033] An object of the present invention is to provide a camera
module and photosensitive unit based on molding technique and
manufacturing method therefor, wherein the camera lens installing
section has a thread structure, so as for mounting a camera lens by
screwing.
[0034] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the photosensitive unit comprises an optical
filter and the optical filter is molded on the sensor of the
photosensitive unit so as to protect the sensor through the optical
filter, wherein the back focal length of the camera module after
assembled is reduced that further reduces the height of the camera
module.
[0035] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the photosensitive unit comprises a reinforced
layer, wherein the reinforced layer is overlappedly attached to a
bottom side of the main circuit board so as to enhance a structural
strength of the main circuit board, that allows the use of a
thinner main circuit board while enhancing the thermal dissipation
ability of the main circuit board.
[0036] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the main circuit board has at least a reinforced
hole therein, wherein the encapsulation portion extends into the
reinforced hole so as to enhance the bonding strength between the
encapsulation portion and the photosensitive unit and increase the
structural strength of the main circuit board.
[0037] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the encapsulation portion is adapted for mounting
a motor or a camera lens thereon, functioning as a conventional
frame that supports the motor or the camera lens in position.
Besides, the encapsulation portion is molded to form and provide a
better smoothness and evenness that substantially reduces the tilt
deviation during the assembling of the camera.
[0038] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the camera module is assembled and produced by
molding that improves the conventional COB technique of the camera
module.
[0039] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the photosensitive circuit unit is manufactured
by molding, so that an integral and molded photosensitive unit is
achieved.
[0040] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the photosensitive unit comprises a motor
connecting structure for connecting with the motor unit, which
alters the conventional means of motor welding.
[0041] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the encapsulation portion at least partially
integrally encapsulates the main circuit board and the
photosensitive sensor, so as to inwardly expand the available area
for the encapsulation portion, which can further reduce the size of
the camera module.
[0042] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the encapsulation portion at least partially
integrally encapsulates the main circuit board and the
photosensitive sensor, such that the photosensitive sensor can be
connected with the main circuit board more stably.
[0043] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the encapsulation portion at least partially
integrally encapsulates the main circuit board and the
photosensitive sensor, so as to enlarge the connecting area between
the encapsulation portion and the photosensitive portion and to
enhance the stability of the connection of the encapsulation
portion.
[0044] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the connecting area between the encapsulation
portion and the photosensitive portion is enlarged, so as to
reinforce the structural strength of the photosensitive
portion.
[0045] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the photosensitive unit is adapted for being
utilized in producing multi-lens and high resolution camera
module.
[0046] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the encapsulation portion forms an inner side
with a controllable gradient, which helps to reduce stray light
reflection to the photosensitive sensor, so as to enhance the image
quality.
[0047] An object of the present invention is to provide a camera
module and photosensitive unit thereof and manufacturing method
therefor, wherein the camera module is adapted for being utilized
in the actual production processes, increasing the product yield
rate, and reducing the production cost.
[0048] An object of the present invention is to provide a camera
module based on integrally encapsulation technology, wherein when
the side or bottom of the circuit board was molded, it can
reinforce the mechanical strength of the module.
[0049] Another object of the present invention is to provide a
camera module based on integrally encapsulation technology, wherein
when the side of the circuit board was molded, it can enhance the
dicing efficiency of the circuit board.
[0050] Another object of the present invention is to provide a
camera module based on integrally encapsulation technology, wherein
when the side of the circuit board was molded, it allows the design
of the module to be more flexible.
[0051] Another object of the present invention is to provide a
camera module based on integrally encapsulation technology, wherein
when the bottom of the circuit board was molded, it can reinforce
the structural strength of the module.
[0052] Another object of the present invention is to provide a
camera module based on integrally encapsulation technology, wherein
when the side or bottom of the circuit board was molded, it can
enhance the heat dissipation efficiency of the module.
[0053] Another object of the present invention is to provide a
camera module based on integrally encapsulation technology, wherein
when the side or bottom of the circuit board was molded, it can
enhance the parallelness of the upper surface of the encapsulation
portion and the surface of the photosensitive sensor of the module
and the flatness and smoothness of the upper surface of the
encapsulation portion.
[0054] Another object of the present invention is to provide a
camera module based on integrally encapsulation technology, wherein
when the side or bottom of the circuit board was molded, it can
decrease the working procedures and enhance the production
efficiency.
[0055] Another object of the present invention is to provide a
camera module based on integrally encapsulation technology, wherein
when the side or bottom of the circuit board was molded, it can
reduce the overall size of the module.
[0056] Another object of the present invention is to provide a
camera module based on integrally encapsulation technology, wherein
when the side or bottom of the circuit board was molded, it can
provide dusts from entering and affecting the function and
performance of the module after the module is formed.
[0057] An object of the present invention is to provide a camera
module and manufacturing method therefor, wherein the camera module
provides a protection frame, arranged on the periphery of the
photosensitive area of the photosensitive sensor, such that when
the integrally encapsulated frame is being formed, the protection
frame can avoid the molding material for forming the integrally
encapsulated frame from damaging the photosensitive area of the
photosensitive sensor.
[0058] An object of the present invention is to provide a camera
module and manufacturing method therefor, wherein when the
integrally encapsulated frame is being formed, the protection frame
can avoid "burr" from occurring on the inner sides of the
integrally encapsulated frame.
[0059] An object of the present invention is to provide a camera
module and manufacturing method therefor, wherein the protection
frame is arranged on the periphery of the filter, such that when
the integrally encapsulated frame is being formed, the protection
frame can avoid "burr" from occurring on the inner sides of the
integrally encapsulated frame.
[0060] An object of the present invention is to provide a camera
module and manufacturing method therefor, wherein the protection
frame is protrudingly deployed on the periphery of the
photosensitive area of the photosensitive sensor, such that when
the forming mold for forming the integrally encapsulated frame
exert pressure on the protection frame, the protection frame can
avoid the forming mold from directly contacting the photosensitive
sensor, so as to prevent the photosensitive area of the
photosensitive sensor from being pressed and damaged or
scratched.
[0061] An object of the present invention is to provide a camera
module and manufacturing method therefor, wherein the protection
frame has resilience for buffering, such that when the protection
frame bears a pressure, it can sufficiently contact the forming
mold, so as to serve as a seal to isolate the photosensitive area
of the photosensitive sensor from the external environment and to
prevent the photosensitive area of the photosensitive sensor from
being damaged during the formation of the integrally encapsulated
frame.
[0062] An object of the present invention is to provide a camera
module and manufacturing method therefor, wherein the protection
frame has resilience for buffering, such that the requirements of
the flatness and smoothness of the camera module can be lowered and
the assembling requirements on the mechanisms of the camera module
can be lowered.
[0063] An object of the present invention is to provide a camera
module and manufacturing method therefor, wherein the protection
frame formed is overlappedly arranged on the photosensitive sensor,
so as to enhance the manufacturing efficiency of the camera
module.
[0064] An object of the present invention is to provide a camera
module and manufacturing method therefor, wherein the surface of
the upper mold of the forming mold comprises at least a cover film
deployed thereon, such that when the upper mold of the forming mold
is pressing, the cover film can provide additional protection to
the photosensitive sensor. Moreover, the cover film also helps in
the difficulty of demolding and enhances the sealingness and
tightness, so as to prevent burr.
[0065] An object of the present invention is to provide a camera
module and manufacturing method therefor, wherein the forming mold
can have a concave structure on the side facing the photosensitive
area of the photosensitive sensor, so as to provide a safe distance
between the photosensitive area of the photosensitive sensor and
the forming mold, which further lowers its impact to the
photosensitive sensor.
[0066] An object of the present invention is to provide a camera
module and manufacturing method therefor, wherein the protection
frame is covered by a layer of protective film, so as to deploy the
protection frame on the photosensitive sensor. Besides, the
protective film may also isolate the photosensitive area of the
photosensitive sensor from the external environment.
[0067] An object of the present invention is to provide a
photosensitive unit and camera module thereof and manufacturing
method therefor, wherein the photosensitive unit comprises a
photosensitive sensor and a main circuit board, wherein the
photosensitive sensor is connected to the main circuit board
through a connecting medium, wherein the shapes of the connecting
medium and the photosensitive sensor match each other.
[0068] An object of the present invention is to provide a
photosensitive unit and camera module thereof and manufacturing
method therefor, wherein the space between the photosensitive
sensor and the main circuit board is completely filled by the
connecting medium without leaving any overhanging space, so as to
enhance the flatness, evenness, and smoothness of the
photosensitive sensor and reduce tilt of the photosensitive sensor
relative to the main circuit board.
[0069] An object of the present invention is to provide a
photosensitive unit and camera module thereof and manufacturing
method therefor, wherein the photosensitive sensor has a front side
and a back side, wherein when manufacturing the photosensitive
sensor, it may spray coat the connecting medium on the back side of
the photosensitive sensor and cut off the excess part of the
connecting medium, so as to match the shape of the connecting
medium and the shape of the photosensitive sensor.
[0070] An object of the present invention is to provide a
photosensitive unit and camera module thereof and manufacturing
method therefor, wherein when manufacturing the photosensitive
unit, it applies the connecting medium on the back side of the
photosensitive sensor through roll extrusion, wherein excess part
of the connecting medium will be cut off, so as to make the
connecting medium attached on the back side of the photosensitive
sensor in an even and flat manner, such that the flatness,
smoothness and evenness of the cementation and connection of the
photosensitive sensor and the main circuit board can be
ensured.
[0071] An object of the present invention is to provide a
photosensitive unit and camera module thereof and manufacturing
method therefor, wherein the connecting medium comprises a circuit
board film, attached on the main circuit board, wherein the shapes
of the circuit board film and the photosensitive sensor match each
other.
[0072] An object of the present invention is to provide a
photosensitive unit and camera module thereof and manufacturing
method therefor, wherein when manufacturing the photosensitive
unit, it may deploy the connecting medium on the back side of a
whole chip and then dice the whole chip into a plurality of single
photosensitive sensors, wherein the photosensitive sensors are
respectively attached on corresponding main circuit boards, which
is suitable for mass production, reduces the assembling hours of
the photosensitive unit, and enhances the production efficiency in
chip attaching.
[0073] An object of the present invention is to provide a
photosensitive unit and camera module thereof and manufacturing
method therefor, wherein the photosensitive unit comprises a
molding body, integrally formed on the circuit board and the
photosensitive sensor, wherein the photosensitive sensor is flat
and smoothly attached on the main circuit board, such that the
photosensitive sensor will not tilt during the forming of the
molding body, which ensures the consistency of the photosensitive
axis of the camera module.
[0074] In order to achieve the above objects and other objects and
advantages of the present invention, the present invention from an
aspect, provides a photosensitive unit of a camera module which
includes: an encapsulation portion and a photosensitive portion.
The photosensitive portion includes a main circuit board and a
photosensitive sensor. The encapsulation portion is encapsulated to
form on the main circuit board and the photosensitive sensor.
[0075] According to a preferred embodiment of the present
invention, the encapsulation portion of the photosensitive unit has
a window corresponding to the photosensitive sensor so as to
provide the photosensitive sensor a light path thereof.
[0076] According to an embodiment of the present invention, the
window of the encapsulation portion of the photosensitive unit
enlarges its size from a bottom thereof upwardly and gradually,
having a smaller bottom size and a larger top size, to form an
inclined shape slope side.
[0077] According to an embodiment of the present invention, the top
of the encapsulation portion of the photosensitive unit is adapted
for installing a camera module component selected from the group
consisting of a camera lens, a motor unit, and an optical filter of
the camera module.
[0078] According to an embodiment of the present invention, the top
of the encapsulation portion is flat, so as for installing a camera
module component selected from the group consisting of a camera
lens, a motor unit, and an optical filter of the camera module.
[0079] According to an embodiment of the present invention, the
encapsulation portion comprises an installing groove arranged on
the top thereof, wherein the installing groove is communicated with
the window, so as for installing a camera module component selected
from the group consisting of an optical filter, a camera lens, and
a motor unit of the camera module.
[0080] According to an embodiment of the present invention, the
encapsulation portion of the photosensitive unit comprises a
covering section, an optical filter installing section, and a
camera lens installing section. The optical filter installing
section and the camera lens installing section are molded to
integrally and upwardly extend from the covering section orderly
and form an internal step shape structure for respectively
installing the optical filters and the camera lens of the camera
module. According to an embodiment of the present invention, the
camera lens installing section of the photosensitive unit comprises
a camera lens inner wall arranged thereon, wherein the camera lens
inner wall is flat and smooth, so as for installing a threadless
camera lens.
[0081] According to an embodiment of the present invention, the
camera lens installing section of the photosensitive unit comprises
a camera lens inner wall arranged thereon, wherein the camera lens
inner wall has a thread structure, so as for installing a camera
lens with thread.
[0082] According to a preferred embodiment of the present
invention, the photosensitive portion of the photosensitive unit
comprises at least one connecting element. The connecting element
electrically connects the photosensitive sensor with the main
circuit board. The encapsulation portion wraps up and encloses the
connecting element to avoid the connecting element from being
directly exposed to outside.
[0083] According to an embodiment of the present invention, the
connecting element of the photosensitive unit is selected from the
group consisting of gold wire, silver wire, copper wire, and
aluminum wire.
[0084] According to an embodiment of the present invention, the
connecting element of the photosensitive unit curvingly connects
the main circuit board and the photosensitive sensor.
[0085] According to a preferred embodiment of the present
invention, the photosensitive sensor of the photosensitive unit
includes a photosensitive area and a non-photosensitive area,
wherein the non-photosensitive area is positioned around the
periphery of the photosensitive area. The encapsulation portion is
molded to extend to the non-photosensitive area of the
photosensitive sensor to inwardly expand the molding area to reduce
an overall dimension of the encapsulation portion.
[0086] According to a preferred embodiment of the present
invention, the photosensitive portion in the photosensitive unit
comprises at least one circuit element protruded from the main
circuit board. The encapsulation portion encapsulates and wraps up
the circuit element to prevent the circuit element from being
directly exposed to outside.
[0087] According to an embodiment of the present invention, the
circuit element of the photosensitive unit is selected from the
group consisting resistor, capacitor, diode, triode, potentiometer,
electric relay, and combinations thereof.
[0088] According to a preferred embodiment of the present
invention, the photosensitive portion in the photosensitive unit
comprises an optical filter covering the photosensitive sensor. The
encapsulation portion is encapsulated to form on the main circuit
board and surround the photosensitive sensor and the optical
filter, so as to protect the photosensitive sensor with the optical
filter and reduce a back focal length and a height of the camera
module.
[0089] According to an embodiment of the present invention, the
photosensitive portion comprises a reinforced layer, overlappedly
attached to the bottom of the main circuit board, so as to
reinforce the structural strength of the main circuit board.
[0090] According to an embodiment of the present invention, the
reinforced layer is a metal plate, so as to enhance the heat
dissipation of the photosensitive portion.
[0091] According to an embodiment of the present invention, the
photosensitive portion of the photosensitive unit comprises a
shielding layer, covering, encapsulating, and wrapping up the main
circuit board and the encapsulation portion, so as to enhance the
electromagnetic immunity of the photosensitive unit.
[0092] According to an embodiment of the present invention, the
shielding layer of the photosensitive unit is a metal plate or a
metal net.
[0093] According to an embodiment of the present invention, the
main circuit board of the photosensitive unit has one or more
reinforced holes formed thereon, wherein the encapsulation portion
is molded to extend into the reinforced holes, so as to enhance the
structural strength of the main circuit board.
[0094] According to an embodiment of the present invention, the
reinforced hole of the photosensitive unit is groove shaped.
[0095] According to an embodiment of the present invention, the
reinforced hole of the photosensitive unit is a through hole, so as
to allow the molding material of the encapsulation portion fully
contact the main circuit board and facilitate the
manufacturing.
[0096] According to an embodiment of the present invention, the
material of the main circuit board of the photosensitive unit is
selected from the group consisting of rigid-flex circuit board,
ceramics base plate, PCB hard board, and flexible printed
circuit.
[0097] According to an embodiment of the present invention, the
material of the encapsulation portion of the photosensitive unit is
selected from the group consisting of nylon, LCP, PP, resin, and
combinations thereof.
[0098] Another aspect of the present invention provides a
manufacturing method for a photosensitive unit of a camera module,
which include the following step: encapsulating to form an
encapsulation portion on a main circuit board and a photosensitive
sensor.
[0099] According to an embodiment of the present invention, the
manufacturing method for the photosensitive unit further includes
the following step: attaching the photosensitive sensor on a main
circuit board and electrically connecting them through at least a
connecting element.
[0100] According to an embodiment of the present invention, the
manufacturing method for the photosensitive unit further comprises
the following step: encapsulating and wrapping up the connecting
element through the encapsulation portion.
[0101] According to an embodiment of the present invention, the
manufacturing method for the photosensitive unit further comprises
the following step: extending the encapsulation portion to a
non-photosensitive area of the photosensitive sensor.
[0102] According to an embodiment of the present invention, the
manufacturing method for the photosensitive unit further comprises
the following step: forming an installing groove on the top of the
encapsulation portion for installing an optical filter, motor unit
or camera lens.
[0103] According to an embodiment of the present invention, the
manufacturing method for the photosensitive unit further comprises
the following step: upwardly extending the encapsulation portion
and forming a two-step structure therein for installing an optical
filter or a camera lens.
[0104] According to an embodiment of the present invention, the
manufacturing method for the photosensitive unit further comprises
the following step: arranged a thread structure on the inner wall
of the encapsulation portion for installing a camera lens with
thread.
[0105] According to an embodiment of the present invention, the
manufacturing method for the photosensitive unit comprising the
following steps: providing at least a groove shaped reinforced hole
on the main circuit board and extending the encapsulation portion
into the reinforced hole.
[0106] According to an embodiment of the present invention, the
manufacturing method for the photosensitive unit comprising the
following steps: providing at least a through-hole shaped
reinforced hole on the main circuit board and extending the
encapsulation portion into the reinforced hole.
[0107] According to an embodiment of the present invention, the
manufacturing method further comprises the following step:
attaching a reinforced layer on the main circuit board, so as to
reinforce the structural strength of the main circuit board.
[0108] According to an embodiment of the present invention, the
manufacturing method for the photosensitive unit further comprises
the following step: covering a shielding layer on the encapsulation
portion and the main circuit board, so as to reinforce the
electromagnetic immunity of the photosensitive unit.
[0109] Another aspect of the present invention provides a
photosensitive unit of a camera module, which includes an
encapsulation portion and a photosensitive portion. The
photosensitive portion includes a main circuit board, a
photosensitive sensor, and an optical filter. The encapsulation
portion is encapsulated to form on the main circuit board, the
photosensitive sensor, and the optical filter.
[0110] Another aspect of the present invention provides a
photosensitive unit of a camera module, wherein the encapsulation
portion comprises a camera lens installing groove, communicated
with the window, so as to provide an installation site for the
motor unit or camera lens of the camera module.
[0111] Another aspect of the present invention provides a
manufacturing method for a photosensitive unit of a camera module,
which include the following step: encapsulating to form an
encapsulation portion on a main circuit board, a photosensitive
sensor, and an optical filter.
[0112] According to an embodiment of the present invention, the
manufacturing method for the photosensitive unit further includes
the following step: attaching the photosensitive sensor on a main
circuit board and electrically connecting them through at least a
connecting element.
[0113] According to another embodiment of the present invention,
the manufacturing method for the photosensitive unit further
includes the following step: positioning the optical filter above
the photosensitive sensor, so as to protect the photosensitive
sensor.
[0114] According to another embodiment of the present invention,
the manufacturing method for the photosensitive unit further
comprises the following step: encapsulating and wrapping up the
connecting element and the optical filter through the encapsulation
portion.
[0115] According to an embodiment of another the present invention,
the manufacturing method for the photosensitive unit further
comprises the following step: extending the encapsulation portion
to an edge of the optical filter.
[0116] Another aspect of the present invention provides a camera
module, which comprises one of the photosensitive units and a
camera lens, wherein the camera lens is arranged along the
photosensitive path of the photosensitive sensor of the
photosensitive unit.
[0117] According to an embodiment of the present invention, the
camera module further includes a frame, wherein the frame is
mounted on the photosensitive unit, wherein the camera lens is
mounted on the frame.
[0118] According to an embodiment of the present invention, the
camera module further includes a motor unit, wherein the camera
lens is mounted in the motor unit, wherein the motor unit is
mounted on the photosensitive unit.
[0119] According to an embodiment of the present invention, the
camera module further includes an optical filter, wherein the
optical filter is mounted on the photosensitive unit.
[0120] According to an embodiment of the present invention, the
camera module further includes an optical filter, wherein the
optical filter is mounted on the frame.
[0121] Still further objects and advantages will become apparent
from a consideration of the ensuing description and drawings.
[0122] These and other objectives, features, and advantages of the
present invention will become apparent from the following detailed
description, the accompanying drawings, and the appended
claims.
BRIEF DESCRIPTION OF THE DRAWINGS
[0123] FIG. 1 is a sectional view illustrates the conventional COB
technique of camera module.
[0124] FIG. 2 is a perspective view of a photosensitive unit
according to a first preferred embodiment of the present
invention.
[0125] FIG. 3 is a sectional view of a photosensitive unit
according to the above first preferred embodiment of the present
invention.
[0126] FIG. 4 is a manufacturing process diagram of a
photosensitive unit according to the above first preferred
embodiment of the present invention.
[0127] FIG. 5 is a block diagram of a manufacturing method for a
photosensitive unit according to the above first preferred
embodiment of the present invention.
[0128] FIG. 6 is a sectional view of the camera module according to
the above first preferred embodiment of the present invention.
[0129] FIG. 7 is an exploded perspective view of the camera module
according to the above first preferred embodiment of the present
invention.
[0130] FIG. 8 is a sectional view of the camera module according to
a first alternative mode of the above first preferred embodiment of
the present invention.
[0131] FIG. 9 is an exploded perspective view of the camera module
according to the above alternative mode of the first preferred
embodiment of the present invention.
[0132] FIG. 10A is a sectional view of a photosensitive unit
according to a second preferred embodiment of the present
invention.
[0133] FIG. 10B is an alternative mode of the above second
preferred embodiment of the present invention.
[0134] FIG. 11 is a sectional view of the camera module according
to the above second preferred embodiment of the present
invention.
[0135] FIG. 12 is a sectional view of a photosensitive unit
according to a third preferred embodiment of the present
invention.
[0136] FIG. 13 is a sectional view of the camera module according
to the above third preferred embodiment of the present
invention.
[0137] FIG. 14 is sectional view of the camera module according to
an alternative of the above third preferred embodiment of the
present invention.
[0138] FIG. 15 is a sectional view of a photosensitive unit
according to a fourth preferred embodiment of the present
invention.
[0139] FIG. 16 is a block diagram of the photosensitive unit
according to the above fourth preferred embodiment of the present
invention.
[0140] FIG. 17 is a sectional view of the camera module according
to the above fourth preferred embodiment of the present
invention.
[0141] FIG. 18 is sectional view of the camera module according to
an alternative of the above fourth preferred embodiment of the
present invention.
[0142] FIG. 19A is a sectional view of a photosensitive unit
according to a fifth preferred embodiment of the present
invention.
[0143] FIG. 19B is an alternative mode of the above fifth preferred
embodiment of the present invention.
[0144] FIG. 20A is a sectional view of the camera module according
to the above fifth preferred embodiment of the present
invention.
[0145] FIG. 20B is a sectional view of a photosensitive unit
according to the above fifth preferred embodiment of the present
invention.
[0146] FIG. 21 is a sectional view of a photosensitive unit
according to a sixth preferred embodiment of the present
invention.
[0147] FIG. 22 is a sectional view of the camera module according
to an alternative mode of the above sixth preferred embodiment of
the present invention.
[0148] FIG. 23 is a sectional view of a photosensitive unit
according to a seventh preferred embodiment of the present
invention.
[0149] FIG. 24 is an exploded perspective view of a photosensitive
unit according to the above seventh preferred embodiment of the
present invention.
[0150] FIG. 25 is a sectional view of a photosensitive unit of the
camera module according to an eighth preferred embodiment of the
present invention.
[0151] FIG. 26 is a sectional view of the camera module according
to a ninth preferred embodiment of the present invention.
[0152] FIG. 27 is a sectional view of the camera module according
to a tenth preferred embodiment of the present invention.
[0153] FIG. 28 is a sectional view of a photosensitive unit
according to an eleventh preferred embodiment of the present
invention.
[0154] FIG. 29 is a sectional view of a photosensitive unit
according to a twelfth preferred embodiment of the present
invention.
[0155] FIG. 30 is the photosensitive unit according to an
alternative mode of the above twelfth preferred embodiment of the
present invention.
[0156] FIG. 31 is a sectional view of a photosensitive unit
according to a thirteenth preferred embodiment of the present
invention.
[0157] FIGS. 32A and 32B are sectional views of a photosensitive
unit according to a fourteenth preferred embodiment of the present
invention.
[0158] FIG. 33 is a perspective view of an alternative mode of an
array camera module according to the above preferred embodiment of
the present invention.
[0159] FIG. 34 is a perspective view of an alternative mode of an
array camera module according to the above preferred embodiment of
the present invention.
[0160] FIG. 35 is a perspective view of an application of the
camera module according to the above preferred embodiment of the
present invention.
[0161] FIGS. 36A and 36B are sectional views illustrating
beneficial effect comparison of the camera module according to the
above preferred embodiments of the present invention.
[0162] FIG. 37 is a perspective view of a photosensitive unit
according to a fifteenth preferred embodiment of the present
invention.
[0163] FIG. 38 is a sectional view of a photosensitive unit
according to a fifteenth preferred embodiment of the present
invention.
[0164] FIG. 39 is a manufacturing process diagram of a
photosensitive unit according to the above fifteenth preferred
embodiment of the present invention.
[0165] FIG. 40 is a block diagram illustrating a manufacturing
method for a photosensitive unit according to the above fifteenth
preferred embodiment of the present invention.
[0166] FIGS. 41A and 41B are sectional views of different
alternative modes of the connecting structure of the photosensitive
unit according to the above fifteenth preferred embodiment of the
present invention.
[0167] FIG. 41C is a perspective view illustrates the motor
connecting structure of the photosensitive unit according to
another alternative mode of the above fifteenth preferred
embodiment of the present invention.
[0168] FIG. 42 is a sectional view of the camera module according
to an alternative mode of the above fifteenth preferred embodiment
of the present invention.
[0169] FIG. 43 is an exploded perspective view of the camera module
according to the above fifteenth preferred embodiment of the
present invention.
[0170] FIG. 44 is sectional view of the camera module according to
an alternative mode of the above fifteenth preferred embodiment of
the present invention.
[0171] FIG. 45 is an exploded perspective view of the camera module
according to the above alternative mode of the above fifteenth
preferred embodiment of the present invention.
[0172] FIG. 46 is a sectional view of a photosensitive unit
according to a sixteenth preferred embodiment of the present
invention.
[0173] FIG. 47 is sectional view of the camera module according to
an alternative mode of the above sixteenth preferred embodiment of
the present invention.
[0174] FIG. 48 is a sectional view of a photosensitive unit
according to an seventeenth preferred embodiment of the present
invention.
[0175] FIG. 49 is sectional view of the camera module according to
an alternative mode of the above seventeenth preferred embodiment
of the present invention.
[0176] FIG. 50 is sectional view of the camera module according to
an alternative mode of the above seventeenth preferred embodiment
of the present invention.
[0177] FIG. 51 is a sectional view of a photosensitive unit
according to a eighteenth preferred embodiment of the present
invention.
[0178] FIG. 52 is a block diagram of the photosensitive unit
according to the above eighteenth preferred embodiment of the
present invention.
[0179] FIG. 53 is a sectional view of the camera module according
to the above eighteenth preferred embodiment of the present
invention.
[0180] FIG. 54 is sectional view of the camera module according to
an alternative mode of the above eighteenth preferred embodiment of
the present invention.
[0181] FIG. 55 is a sectional view of a photosensitive unit
according to a nineteenth preferred embodiment of the present
invention.
[0182] FIG. 56 is an exploded perspective view of a photosensitive
unit according to the above nineteenth preferred embodiment of the
present invention.
[0183] FIG. 57 is a sectional view of a photosensitive unit of the
camera module according to a twentieth preferred embodiment of the
present invention.
[0184] FIG. 58 is a sectional view of the camera module according
to a twentieth preferred embodiment of the present invention.
[0185] FIG. 59 is a sectional view of the camera module according
to a twenty-one preferred embodiment of the present invention.
[0186] FIG. 60 is a sectional view of a camera module based on
integrally encapsulation technology according to one preferred
embodiment of the present invention.
[0187] FIG. 61 is a sectional view of a camera module based on
integrally encapsulation technology according to another embodiment
of the present invention.
[0188] FIG. 62A is a sectional view illustrating the molding of the
camera module according to the above preferred embodiments of the
present invention.
[0189] FIG. 62B is a sectional view illustrating the molding of the
camera module molded according to the above preferred embodiments
of the present invention.
[0190] FIG. 62C is a sectional view illustrating the molding of the
camera module according to the above preferred embodiments of the
present invention.
[0191] FIG. 62D is a sectional view illustrating the molding of the
camera module according to the above preferred embodiments of the
present invention.
[0192] FIG. 62E is a sectional view illustrating the molding of the
camera module according to the above preferred embodiments of the
present invention.
[0193] FIG. 63A is a sectional view of a camera module based on
integrally encapsulation technology according to another embodiment
of the present invention.
[0194] FIG. 63B is a sectional view of a camera module based on
integrally encapsulation technology according to another embodiment
of the present invention.
[0195] FIG. 64 is a sectional view of a camera module based on
integrally encapsulation technology according to another embodiment
of the present invention.
[0196] FIG. 65 is a sectional view of a camera module based on
integrally encapsulation technology according to another embodiment
of the present invention.
[0197] FIG. 66A is a sectional view of a camera module based on
integrally encapsulation technology according to an alternative
mode of the above embodiment of the present invention.
[0198] FIG. 66B is a sectional view of a camera module based on
integrally encapsulation technology according to another
alternative mode of the above embodiment of the present
invention.
[0199] FIG. 67A is a sectional view of a camera module based on
integrally encapsulation technology according to an alternative
mode of the above embodiment of the present invention.
[0200] FIG. 67B is a sectional view of a camera module based on
integrally encapsulation technology according to an alternative
mode of the above embodiment of the present invention.
[0201] FIG. 68A is a sectional view of a camera module based on
integrally encapsulation technology according to an alternative
mode of the above embodiment of the present invention.
[0202] FIG. 68B is a sectional view of a camera module based on
integrally encapsulation technology according to another
alternative mode of the above embodiment of the present
invention.
[0203] FIG. 69 is a sectional view of a connecting and
communicating arrangement of the motor unit and the circuit board
according to the above embodiment of the camera module based on
integrally encapsulation technology of the present invention.
[0204] FIG. 70 is a sectional view of another connecting and
communicating arrangement of the motor unit and the circuit board
according to the above embodiment of the camera module based on
integrally encapsulation technology of the present invention.
[0205] FIG. 71 is a sectional view of another connecting and
communicating arrangement of the motor unit and the circuit board
according to the above preferred embodiment of the camera module
based on integrally encapsulation technology of the present
invention.
[0206] FIG. 72 is a sectional perspective view illustrating the
camera module according to another preferred embodiment of the
present invention.
[0207] FIG. 73 is an exploded perspective view illustrating
structural relations of the circuit board, photosensitive sensor,
and protection frame of the camera module according to the above
preferred embodiment of the present invention.
[0208] FIG. 74A is a sectional view illustrating step one of the
manufacturing method for the camera module according to the above
preferred embodiment of the present invention.
[0209] FIG. 74B is a sectional view illustrating step two of the
manufacturing method for the camera module according to above
preferred embodiment of the present invention.
[0210] FIG. 74C is a sectional view illustrating step three of the
manufacturing method for the camera module according to above
preferred embodiment of the present invention.
[0211] FIG. 74D is a sectional view illustrating step four of the
manufacturing method for the camera module according to above
preferred embodiment of the present invention.
[0212] FIG. 74E is a sectional view illustrating step five of the
manufacturing method for the camera module according to above
preferred embodiment of the present invention.
[0213] FIG. 74F is a sectional view illustrating step six of the
manufacturing method for the camera module according to above
preferred embodiment of the present invention.
[0214] FIG. 75A is a sectional view illustrating step three of the
manufacturing method for the camera module according to another
alternative mode of the above preferred embodiment of the present
invention.
[0215] FIG. 75B is a sectional view illustrating step four of the
manufacturing method for the camera module according to another
alternative mode of the above preferred embodiment of the present
invention.
[0216] FIG. 76 is a sectional view illustrating step four of the
manufacturing method for the camera module according to an
alternative mode of the above preferred embodiment of the present
invention.
[0217] FIG. 77A is a sectional view illustrating step one of the
manufacturing method for the camera module according to another
preferred embodiment of the present invention.
[0218] FIG. 77B is a sectional view illustrating step two of the
manufacturing method for the camera module according to above
preferred embodiment of the present invention.
[0219] FIG. 77C is a sectional view illustrating step three of the
manufacturing method for of the camera module according to above
preferred embodiment of the present invention.
[0220] FIG. 77D is a sectional view illustrating step four of the
manufacturing method for the camera module according to above
preferred embodiment of the present invention.
[0221] FIG. 77E is a sectional view illustrating step five of the
manufacturing method for the camera module according to above
preferred embodiment of the present invention.
[0222] FIG. 77F is a sectional view illustrating step six of the
manufacturing method for the camera module according to above
preferred embodiment of the present invention.
[0223] FIG. 77G is a sectional view illustrating step seven of the
manufacturing method for the camera module according to above
preferred embodiment of the present invention.
[0224] FIG. 78 is a sectional perspective view illustrating the
camera module according to another preferred embodiment of the
present invention.
[0225] FIG. 79 is an exploded perspective view illustrating
structural relations of the circuit board, photosensitive sensor,
filter, and protection frame of the camera module according to the
above preferred embodiment of the present invention.
[0226] FIG. 80A is a sectional view illustrating step one of the
manufacturing method for the camera module according to the above
preferred embodiment of the present invention.
[0227] FIG. 80B is a sectional view illustrating step two of the
manufacturing method for the camera module according to above
preferred embodiment of the present invention.
[0228] FIG. 80C is a sectional view illustrating step three of the
manufacturing method for the camera module according to above
preferred embodiment of the present invention.
[0229] FIG. 80D is a sectional view illustrating step four of the
manufacturing method for the camera module according to above
preferred embodiment of the present invention.
[0230] FIG. 80E is a sectional view illustrating step five of the
manufacturing method for the camera module according to above
preferred embodiment of the present invention.
[0231] FIG. 80F is a sectional view illustrating step six of the
manufacturing method for the camera module according to above
preferred embodiment of the present invention.
[0232] FIGS. 81A-81C illustrate chip and circuit board assembled by
a D/A technology.
[0233] FIG. 82 is a sectional view of a photosensitive unit
according to a preferred embodiment of the present invention.
[0234] FIG. 83 is a procedural diagram of a first type of
manufacturing method for a photosensitive unit according to a
preferred embodiment of the present invention.
[0235] FIG. 84 is a block diagram of a first type of manufacturing
method of a photosensitive unit according to a preferred embodiment
of the present invention.
[0236] FIG. 85 is a procedural diagram of a second type of
manufacturing method for a photosensitive unit according to a
preferred embodiment of the present invention.
[0237] FIG. 86 is a block diagram of a second type of manufacturing
method of a photosensitive unit according to a preferred embodiment
of the present invention.
[0238] FIG. 87A is a procedural diagram of a third type of
manufacturing method for a photosensitive unit according to a
preferred embodiment of the present invention.
[0239] FIG. 87B is a procedural diagram of a fourth type of
manufacturing method for a photosensitive unit according to a
preferred embodiment of the present invention.
[0240] FIG. 88 is a block diagram of a third type of manufacturing
method of a photosensitive unit according to a preferred embodiment
of the present invention.
[0241] FIG. 89 is a sectional view of a camera module utilizing the
photosensitive unit according to a preferred embodiment of the
present invention.
[0242] FIG. 90 is a sectional view of a photosensitive unit
according to another preferred embodiment of the present
invention.
[0243] FIG. 91 is a sectional view of a camera module utilizing the
photosensitive unit according to another preferred embodiment of
the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0244] The following is disclosed in order that those skilled in
the art can implement the present invention. Preferred embodiments
in the following descriptions are to give examples only. Those
skilled in the art can think of other obvious modifications. The
basic notions of the present invention defined in the following
descriptions can apply to other implementations, modifications,
improvements, equivalences, and other technical solutions that do
not deviate from the scope or spirit of the present invention.
[0245] Those skilled in the art should understand that in the
disclosure of the present invention, terms such as "longitudinal,"
"lateral," "upper," "lower," "front," "back," "left," "right,"
"perpendicular," "horizontal," "top," "bottom," "inner," "outer,"
etc., which indicate directions or positional relations are based
on the directions or positional relations demonstrated in the
figures and only to better describe the present invention and
simplify the description, rather than to indicate or imply that the
indicated device or element must be applied to a specific direction
or be operated or constructed in a specific direction. Therefore,
these terms shall not be considered limits of the present
invention.
[0246] Referring to FIGS. 2 to 7, a camera module and its
photosensitive unit are illustrated according to a first preferred
embodiment of the present invention. The photosensitive unit 1010,
which is constructed and configured for assembling and producing
the camera module, includes an encapsulation portion 1011 and a
photosensitive portion 1012, wherein the encapsulation portion 1011
is integrally encapsulated and connected to the photosensitive
portion 1012, such as being molded to connect to the photosensitive
portion 1012.
[0247] The photosensitive portion 1012 includes a main circuit
board 10122 and a photosensitive sensor 10121, wherein the
photosensitive sensor 10121 is disposed on the main circuit board
10122. According to the present embodiment of the present
invention, the photosensitive sensor 10121 is molded to connect to
the main circuit board 10122. Especially, the encapsulation portion
1011 is moldingly coupled to the photosensitive portion 1012 by
means of, for example, the method of Molding on Chip (MOC).
[0248] In other words, the encapsulation portion 1011, at least
partially, integrally encapsulates the main circuit board 10122 and
the photosensitive sensor 10121.
[0249] According to the present embodiment of the present
invention, the photosensitive portion 1012 includes a connecting
circuit and at least a circuit element 10123. The connecting
circuit is prearranged in the main circuit board 10122 and the
circuit element 10123 is electrically connected to the connecting
circuit and the photosensitive sensor 10121 to process the
photosensing function for the photosensitive sensor 10121. The
circuit element 10123 is protrudedly deployed on the main circuit
board 10122. The circuit element 10123 can be, for example but not
limited to, resistors, capacitors, diodes, triodes, potentiometers,
electric relays, or actuators.
[0250] It is worth mentioning that the encapsulation portion 1011
encapsulates and wraps up the circuit element 10123 therein, so
that the circuit element 10123 will not be directly exposed in any
space and, more specifically, not be exposed in the environment
that communicates with the photosensitive sensor 10121. Therefore,
during the assembling of the camera module, the circuit element
10123 will not be contaminated with contaminants, such as dusts,
and influence the photosensitive sensor 10121, that is different
from the arrangement of conventional camera module that the circuit
components, such as resistance-capacitance components, are exposed
to outside. So that by means of such molding encapsulation,
sundries and dusts are prevented from staying on the surface of the
circuit element 10123 to avoid the photosensitive sensor 10121 from
being contaminated thereby that would result in dark spots and
other defectives of the camera module.
[0251] The manner that has the encapsulation portion 1011 be
integrally formed on the main circuit board 10122 and the
photosensitive sensor 10121 is advantageous in several aspects, for
example but not limited to the follows.
[0252] First, by integrally forming the encapsulation portion 1011
on the main circuit board 10122 and the photosensitive sensor
10121, the traditional technique like adhering the frame 3P on the
circuit board 1P in conventional OCB module will no longer be
required, such that it not only saves the gluing space, but also
skips the AA adjustment of the encapsulation portion 1011.
[0253] Second, when the encapsulation portion 1011 is integrally
molded to form on the main circuit board 10122 and the
photosensitive sensor 10121, it improves the evenness and flatness
of the surface of the encapsulation portion 1011, such that the
evenness and flatness of the encapsulation portion 1011 becomes
better than it of a frame 3P made through conventional injection
molding technique.
[0254] Third, when the encapsulation portion 1011 is integrally
molded to form on the main circuit board 10122 and the
photosensitive sensor 10121, it expands the area available for
forming or arranging the encapsulation portion 1011 inward, so as
to allow the overall dimensions of the camera module to be
compressed inward, which provides a potential extent to further
reduce the size of the camera module.
[0255] Fourth, when the encapsulation portion 1011 is integrally
molded to form on the main circuit board 10122 and the
photosensitive sensor 10121, the photosensitive sensor 10121 is
affixed on the main circuit board 10122 more stably due to the
reinforcement of the encapsulation portion 1011, which prolongs the
service life of the camera module.
[0256] Fifth, when the encapsulation portion 1011 is integrally
molded to form on the main circuit board 10122 and the
photosensitive sensor 10121, it enlarges the overall connecting
area of the encapsulation portion 1011 and the photosensitive
portion 1012, which enhances the stability of the connection of the
encapsulation portion 1011.
[0257] Sixth, when the encapsulation portion 1011 is integrally
molded to form on the main circuit board 10122 and the
photosensitive sensor 10121, it enlarges the interconnecting area
between the encapsulation portion 1011 and the photosensitive
portion 1012, which enhances the structural strength of the
photosensitive portion 1012 through the encapsulation portion
1011.
[0258] Seventh, when the encapsulation portion 1011 is integrally
molded to form on the main circuit board 10122 and the
photosensitive sensor 10121, it allows the photosensitive unit 1010
to be utilized in the production of multi-lens and high resolution
camera modules, such that the molding encapsulation technology can
be utilized in actual production and be suitable for the
development needs of the components of current camera module.
[0259] Eighth, the way the encapsulation portion 1011 being
integrally molded to form on the main circuit board 10122 allows
the height and width of the encapsulation portion 1011 to be
flexibly adjusted and controlled, such that the back focal length
of the camera module can be flexibly adjusted and controlled and
module of various sizes can be made, so as to be adapted for
different types of camera module.
[0260] Ninth, when the encapsulation portion 1011 is integrally
molded to form on the main circuit board 10122, it does not require
connecting medium like glue to be closely connected on the main
circuit board and it can reinforce the structural strength of the
main circuit board 10122, so as to allow the thickness of the main
circuit board 10122 to further be reduced.
[0261] It is also worth mentioning that the camera module as a
small-sized product is composed by small components, so any small
difference can eventually bring a relatively large influence to the
camera module. Because of such variation, even a small change in a
macro view is critical to the actual production of the camera
module, which may even decide if a concept can actually be
implemented in the production process.
[0262] It is also worth mentioning that the camera module as a
whole is composed by various components, such as photosensitive
sensor, camera lens, motor unit, and etc., which components are
adapted to each other. In other words, the developments of
different components are not independent, but interrelated. For
instance, the pixel increase has to do with not only the
photosensitive sensor, but also the camera lens, while the camera
lens has installation requirements, which has to do with the
supporting elements. In the development of the actual production of
the camera module, the requirements to the frame are relatively low
and the influences of the evenness and flatness thereof, the
exposure of the circuit components, and the size of the circuit
components to the whole camera module are not major concerns
because the performance of early photosensitive sensor is low and
there were only few lenses, like one or two, in a camera lens. The
most important qualities were about the basic hardware, such as the
performance improvements on the photosensitive sensor and the
camera lens. Nevertheless, for the camera module of today,
especially the camera module for the rapid developing smartphone,
demands in all aspects, such as pixel, size, accuracy, and etc.,
are continuously promoted. Quantity of the lens, for example, has
increased from 4, to 5, 6, 7, and more pieces. Such demands have
required the development of the camera module to be more
meticulous. For instance, it could be dispensable for a camera
module constructed with a camera lens having one lens or two to
utilize the way of the present invention that have the
encapsulation portion 1011 integrally encapsulate the main circuit
board 10122 and the photosensitive sensor 10121. The improvement of
the present invention would not bring advantage to such simple
camera module. On the other hand, for those camera module
constructed with a camera lens having multiple lenses, the
improvement of the present invention would show significant
advantages and would be very suitable for its development and
actual production process. Besides, another critical factor of an
actual production is product yield rate, which, namely, is the
stability of the overall performance of the mass produced products.
Therefore, since the camera module of the embodiment of the present
invention has a significant better product yield rate than the
camera module of conventional structure, the camera module of the
present invention is advantageous even for camera modules of the
same size because it is suitable for mass production, lower in the
production cost, and suitable for the development of the entire
camera module industry. Of course, there are other advantages of
the way that the encapsulation portion 1011 integrally encapsulates
the main circuit board 10122 and the photosensitive sensor 10121,
which, nevertheless, are not completely specified here.
[0263] It is worth mentioning that, in the present embodiment of
the present invention, the circuit element 10123 is recited as
protruded on the main circuit board 10122 as an example for the
description, whereas in other embodiments of the present invention,
the circuit element 10123 can also be embedded in the main circuit
board 10122 without protruding from the main circuit board 10122 or
be attached on the back side of the main circuit board 10122.
Person skilled in the art should understand that the shape, type,
and mounting position of the circuit element 10123 should not limit
the present invention.
[0264] The encapsulation portion 1011 has a through hole window
101100 formed therein to provide a photosensitive path for the
photosensitive sensor 10121.
[0265] In other words, the encapsulation portion 1011 provides a
window, so as to serve as an light path for the photosensitive
sensor 10121, such that light passed through the camera lens 1030
(being introduced later) positioned on the top of the encapsulation
portion 1011 can reach the photosensitive sensor 10121 without
being obstructed by the encapsulation portion 1011.
[0266] According to the present preferred embodiment of the present
invention, the photosensitive portion 1012 includes at least one
connecting element 10124 for electrically connecting the
photosensitive sensor 10121 with the main circuit board 10122.
Further, the connecting element (lead wire) 10124 can be embodied
to be, for example but not limited to, gold wire, copper wire,
aluminum wire, and/or silver wire. Especially, the connecting
elements 10124 curvingly connect the photosensitive sensor 10121
and the main circuit board 10122.
[0267] It is worth mentioning that the connecting element 10124 is
molded inside the encapsulation portion 1011, so as to enclose,
encapsulate and/or wrap up the connecting element 10124 by the
encapsulation portion 1011 to keep them from direct exposure to
outside. Therefore, during the assembling of the camera module, the
connecting element(s) 10124 will not receive any collision and
damage, and, at the same time, it reduces the adverse effect of the
connecting element(s) 10124 due to the environmental factors, such
as temperature, so as to ensure a stable communication and
connection between the photosensitive sensor 10121 and the main
circuit board 10122. This is completely different from the
conventional art.
[0268] Preferably, the window 101100 of the encapsulation portion
1011 enlarges its size from a bottom thereof upwardly and
gradually, having a smaller bottom size and a larger top size, to
form an inclined shape slope side. Nonetheless, such inclined shape
shall not be considered as a limitation to the present
invention.
[0269] The encapsulation portion 1011 has an inner side 101200. The
inner side 101200 surrounds to form the window 101100. The inner
side 101200 is arranged in a inclined and slope manner, such that
the window 101100 enlarges its size from a bottom thereof upwardly
and gradually, having a smaller bottom size and a larger top size,
to form an inclined shape slope side. Specifically, the inner side
101200 has a tilt angle .alpha., which is the included angle
between the tilt direction of the inner side 101200 and the
vertical direction.
[0270] It is worth mentioning that the encapsulation portion 1011
is integrally formed through a forming mold (being introduced
later). After the encapsulation portion 1011 is formed, the forming
mold has to be separated from the photosensitive unit 1010, which
is demolding. Due to the interactive forces, such as pressing
force, friction force, and etc., between the forming mold and the
encapsulation portion 1011, the forming mold can be hard to be
demolded, the shape of the encapsulation portion 1011 will
affected, and there can be burr or even more serious issue. These
problems seriously bother the actual production and lower the
product yield rate thereof. On the other hand, according to the
present invention, the encapsulation portion 1011 is arranged in a
inclined and slope manner, such that it only has to make a certain
shift of the forming mold relatively to the encapsulation portion
1011, a gap will be created between the encapsulation portion 1011
and the forming mold, which reduces the influence of the forming
mold to the encapsulation portion 1011 and allows the camera module
to actually be mass produced. It is worth noticing that these
relatively small improvements come out from long time testing.
Moreover, these tiny improvements are usually determinants that
decide whether a theoretically workable solution can actually put
into production.
[0271] The magnitude of the tilt angle .alpha. can be designed
based on the actual needs.
[0272] The arrangement of the inner side 101200 of the
encapsulation portion 1011 and the tilt structure of the inner side
101200 are advantageous in several aspects, for example but not
limited to the follows. First, the tilt arrangement of the inner
side 101200 helps the demolding process in actual production, which
reduces burr of the encapsulation portion 1011 and is practical for
the actual production. Second, because the arrangement of the inner
side 101200 enlarges the direct contact area to the air in the
closed interior space of the camera lens and because of the
characteristic of the integrally forming material of the
encapsulation portion 1011, dust particles in the interior space
becomes more likely to stay on the inner side 101200 of the
encapsulation portion 1011, which, namely, helps to capture the
dust particle. Third, the tilt arrangement of the inner side 101200
changes the reflection angle of the entering light on the inner
side 101200, which reduces stray light reflected to the
photosensitive area of the photosensitive sensor 10121 and reduces
the influence of the stray light to the image quality. Fourth, the
tilt arrangement of the inner side 101200 enlarges the upper
opening of the encapsulation portion 1011, which allows more light
to enter.
[0273] According to the present invention, the camera module and
photosensitive unit and manufacturing method thereof are disclosed,
wherein the camera module is adapted for being utilized in the
actual production processes, increasing the product yield rate, and
decreasing the production cost.
[0274] It is worth mentioning that the encapsulation portion 1011
substantially covers and encloses, encapsulates and/or wraps up the
circuit element 10123 and the connecting element 10124 that
advantages in protecting the circuit element 10123 and the
connecting element 10124 as well as in achieving a higher
performance camera module. However, those skilled in the art should
understand that the encapsulation portion 1011 shall not be limited
in wrapping up the circuit element 10123 and/or the connecting
element 10124. In other words, in other embodiments of the present
invention, the encapsulation portion 1011 can be directly molded on
the main circuit board 10122 without circuit element 10123
protruded thereon or be molded on various positions, such as the
outer side portion and the periphery, of the circuit element
10123.
[0275] In addition, the photosensitive sensor 10121 has a
photosensitive area 101211 and a non-photosensitive area 101212,
wherein the non-photosensitive area 101212 is positioned around the
periphery of the photosensitive area 101211. The photosensitive
area 101211 is adapted for conducting photosensitive function and
process. The connecting element 10124 is connected to the
non-photosensitive area 101212.
[0276] According to the present preferred embodiment of the present
invention, the encapsulation portion 1011 is extended to the
non-photosensitive area 101212 of the photosensitive sensor 10121,
so as to overlappedly affix the photosensitive sensor 10121 on the
main circuit board 10122 by means of molding. In this manner, such
as the method of Molding on Chip (MOC), the molding area of the
encapsulation portion 1011 can be extended inwardly, so that the
outer structural portions of the encapsulation portion 1011 and the
main circuit board 10122 can be reduced, which further reduces the
size in length and width of the photosensitive unit 1010 as well as
the size in length and width of the camera module assembled
thereby.
[0277] In the present embodiment of the present invention, the
encapsulation portion 1011 is protrudingly positioned surrounding
the outer portion of the photosensitive area 101211 of the
photosensitive sensor 10121. Particularly, the encapsulation
portion 1011 integrally seals its connection, so as to provide a
great sealingness and tightness. Therefore, when the photosensitive
unit 1010 is used to assemble the camera module, the photosensitive
sensor 10121 will be sealed inside the camera module to forms a
sealed inner space.
[0278] Practically, to produce the photosensitive unit 1010, a
conventional circuit board can be used to produce the main circuit
board 10122, wherein a photosensitive sensor 10121 is provided on
the main circuit board 10122 and electrically connected by the
connecting elements 10124. And then, the assembled main circuit
board 10122 with photosensitive sensor 10121 affixed thereon are
molded by means of, for example, the compression molding technique
that is commonly applied in semiconductor packaging industry, to
form the encapsulation portion 1011. Alternatively, the main
circuit board 10122 can be molded by means of insert molding
technique by an injection molding machine to mold the main circuit
board 10122 which has been processed by a surface mount technology
(SMT) to form the encapsulation portion 1011. The main circuit
board 10122 can selectively be, for example but not limited to,
rigid-flex circuit board, ceramic substrate circuit board (without
flexible board), rigid PCB (without flexible board), and etc. The
formation of the encapsulation portion 1011 can be selected by, for
example but not limited to, injection molding technique and
pressing molding technique. The material of the encapsulation
portion 1011 can be, for example but not limited to, nylon, liquid
crystal polymer (LCP), or polypropylene (PP) for injection molding
technique, or thermoplastic resin or thermosetting resin for
pressing molding technique. Person skilled in the art should
understand that the above available manufacture methods and
available materials are examples to describe available
implementations of the present invention, rather than limitations
of the present invention.
[0279] It is worth mentioning that according to the molding
formation method of the photosensitive unit 1010 of the present
invention, the molded photosensitive unit 1010 is suitable for
making in form of combined board that can produce photosensitive
units 1010 as many as 90 pieces, for example, at the same time,
while conventional injected encapsulation portion, that is, the
lens holder, requires a prior gluing process and usually allow only
piece to be attached at a time, which can merely allow 4-8 pieces
in most cases or up to 32 pieces the most to be produced at one
time.
[0280] The manner that has the encapsulation portion 1011 cover and
enclose, encapsulate and/or wrap up the circuit element 10123 and
the connecting element 10124 is advantageous in several aspects,
for example but not limited to the follows.
[0281] First, when the encapsulation portion 1011 covers and
encloses, encapsulates and/or wraps up the circuit element 10123
and the connecting element 10124, it does not have to reserve extra
safety margin for the circuit element 10123 and the connecting
element 10124, which provides potential for size reduction of the
camera module.
[0282] Second, when the encapsulation portion 1011 covers and
encloses, encapsulates and/or wraps up the circuit element 10123
and the connecting element 10124, it helps the circuit element
10123 and the connecting element 10124 to be stably secured
internally, which can avoid unnecessary influences, such as
collision, during the assembling and lower the effects, such as
shaking, occurring in use to the camera module.
[0283] Third, when the encapsulation portion 1011 covers and
encloses, encapsulates and/or wraps up the circuit element 10123
and the connecting element 10124, it isolates the circuit element
10123, the connecting element 10124 and other components, which
reduces the external and reciprocal electromagnetism influences and
helps them to function more stably.
[0284] Fourth, when the encapsulation portion 1011 covers and
encloses, encapsulates and/or wraps up the circuit element 10123
and the connecting element 10124, it avoids the circuit element
10123 and the connecting element 10124 from directly exposed to the
closed interior space of the camera lens, so as to not only prevent
sundries and dusts on the circuit element 10123 and the connecting
element 10124 from entering the interior space and affecting the
image quality, but also avoid the circuit element 10123 and the
connecting element 10124 from reflecting stray light to the
photosensitive sensor 10121 and affecting the image quality.
[0285] Fifth, when the encapsulation portion 1011 covers and
encloses, encapsulates and/or wraps up the connecting wire, it
allows the integral forming area of the encapsulation portion 1011
to expand inward to the non-photosensitive area of the
photosensitive sensor 10121.
[0286] Furthermore, the encapsulation portion 1011 includes a
covering section 10111 and an optical filter installing section
10112. The optical filter installing section 10112 is integrally
molded to connect with the covering section 10111. The covering
section 10111 is molded to mount on the main circuit board 10122 to
encapsulate, wrap up and/or enclose the circuit element(s) 10123
and the connecting element(s) 10124. The optical filter installing
section 10112 is configured for installing the optical filter 1020.
In other words, when the photosensitive unit 1010 is used for
assembling the camera module, the optical filter 1020 of the camera
module is mounted at the optical filter installing section 10112 to
ensure the optical filter 1020 be deployed along a photosensitive
path of the photosensitive sensor 10121 and does not require any
additional mounting frame for installing the optical filter. In
other words, the encapsulation portion 1011 itself also provides
the function as a conventional mounting frame and, in addition,
according to the advantage of molding technique, the top of the
optical filter installing section 10112 would have good evenness
and smoothness due to the molding technique, so as to allow the
optical filter 1020 to be installed in an even and flat manner that
is more superior to the conventional camera modules. Particularly,
the optical filter 1020 can be an Infrared-Cut Filter (IRCF).
[0287] In addition, the optical filter installing section 10112 has
an installing groove 101121. The installing groove 101211 is
communicated with the window 101100 to provide an adequate
installation space for the optical filter 1020 such that the
optical filter 1020 will not protrude from the top surface 101122
of the optical filter installing section 10112. In other words, the
installing groove 101121 is provided on top of the encapsulation
portion 1011 for the optical filter 1020 to be installed
therein.
[0288] It is worth mentioning that, in the present embodiment of
the present invention, the installing groove 101121 can be used for
the installation of the optical filter, whereas in other
embodiments of the present invention, the installing groove 101121
can be used for the installation of other component, such as the
camera lens, motor of the camera module, or etc. Person skilled in
the art should understand that the use of the installing groove
101121 shall not consider as a limitation of the present
invention.
[0289] It is worth mentioning that the inner wall of the
encapsulation portion 1011 is designed according to the shape of
the connecting element 10124 to be mounted thereon. For example, it
can be in sloped or inclined shape, so that while it encapsulates
and wraps up the connecting element(s) 10124, the photosensitive
sensor 10121 is capable of receiving as much light as possible.
Person skilled in the art should understand that a specific shape
of the encapsulation portion 1011 will not limit the scope of the
present invention.
[0290] Referring to FIGS. 2-7, the camera module according to a
first preferred embodiment of the present invention is illustrated.
The camera module can be a fixed focus module (FFM). The camera
module 10100 includes one the photosensitive unit 1010, one the
optical filter 1020, and a camera lens 1030.
[0291] The optical filter 1020 and the camera lens 1030 are mounted
at the photosensitive unit 1010.
[0292] More specifically, the optical filter 1020 is mounted in the
installing groove 101121 of the optical filter installing section
10112 of the encapsulation portion 1011 of the photosensitive unit
1010. The camera lens 1030 is mounted at a top portion of the
optical filter installing section 10112 of the encapsulation
portion 1011 of the photosensitive unit 1010. In other words, the
optical filter 1020 is mounted in the installing groove, while the
camera lens 1030 is mounted on top of the encapsulation portion
1011.
[0293] It is also worth mentioning that the camera lens 1030 is
supported on top of the optical filter installing section 10112 of
the encapsulation portion 1011 of the photosensitive unit 1010.
Therefore, the encapsulation portion 1011 functions as the frame of
a conventional camera module to provide a supportive and holding
site for the camera lens 1030, but it is assembled by a different
process from the process of the conventional COB technology. The
conventional frame of a conventional camera module assembled based
on the conventional COB technique is glued to affix on the circuit
board by adhesive, but the encapsulation portion 1011 is molded to
encapsulate and wrap up the main circuit board 10122 by means of
the molding technique without the requirement of any adhering and
affixing process. With respect to the process of adhering and
affixing, the molding process provides better connection stability
and controllability thereof. Besides, it does not have to reserve
adhering space for AA adjustment between the encapsulation portion
1011 and the main circuit board 10122 according to the present
invention, and thus it saves the adhering space for AA adjustment
of the conventional camera module. Accordingly, under the same
achievement in structural strength with respect to the conventional
camera module, the molded main circuit board 10122 according to the
molding technology of the present invention has a thinner
thickness. The thickness of the molded main circuit 122 can be
further reduced when the optical filter quilt 20 is directly
attached on the molded surface that enables a shorter back focal
length of the camera lens 30, so as to further reduce the thickness
of the camera module. On the other hand, the encapsulation and
enclosure of the circuit elements 10123 and the connecting elements
10124 by the encapsulation portion 1011 allows the supporting
feature of conventional frame being provided overlappedly with the
circuit elements 10123 and the connecting element 10124 spatially
to save space, without the need of the conventional camera module
that requires to reserve a safe distance around the circuit
components. As a result, the height of the encapsulation portion
1011 can be configured in a smaller range while providing its
supporting function and feature, so as to provide a room of further
reduction of the thickness of the camera module. Besides, the
encapsulation portion 1011 substitutes the conventional frame that
prevents any tilt deviation occurred in adhering and assembling
such conventional frame that reduces the accumulated tolerance of
the assembly of the camera module. In addition, the encapsulation
and wrapping up of the connecting element(s) 10124 by the
encapsulation portion 1011 and the inner extension of the
encapsulation portion 1011 towards the non-photosensitive area
101212 of the photosensitive sensor 10121 enables the size of the
encapsulation portion 1011 can be shrunk inwardly, so as to further
decrease the lateral sizes in length and width of the camera
module.
[0294] Referring to FIGS. 2, 5, 8, and 9, an alternative mode of
the camera module 10100 according to the above first preferred
embodiment of the present invention is illustrated. The camera
module 10100 can be an Automatic Focus Camera Module (AFM). The
camera module includes one the photosensitive unit 1010, one the
optical filter 1020, one motor unit 1030, and a camera lens
1030.
[0295] The optical filter 1020 is mounted in the photosensitive
unit 1010, while the camera lens 1030 is mounted in the motor unit
1040. The motor unit 1040 is mounted on the photosensitive unit
1010.
[0296] Furthermore, the optical filter 1020 is mounted in the
installing groove 101121 of the optical filter installing section
10112 of the encapsulation portion 1011 of the photosensitive unit
1010. The motor unit 40 is mounted on top of the optical filter
installing section 10112 of the encapsulation portion 1011 of the
photosensitive unit 1010. In other words, the optical filter 1020
is mounted in the installing groove of the encapsulation portion
1011, while the camera lens 1030 is installed in the motor unit
1040. The motor unit 1040 is mounted on top of the encapsulation
portion 1011.
[0297] Especially, when the motor terminal is affixed on the
circuit junction by attaching with conducting adhesive, it does not
require to solder any lead wire for connecting the motor unit 1040
with the main circuit board 10122 of the photosensitive portion
1012, and thus it reduces the motor soldering process.
[0298] The motor unit 1040 is mounted on the encapsulation portion
1011. In other words, the motor unit 1040 is supported on the top
of the encapsulation portion 1011. Because the encapsulation
portion 1011 is integrally formed on the main circuit board 10122
by the mold, it can provide a flat and smooth installing plane,
which is, namely, the flat and smooth top surface 101122, for the
motor unit 1040, which facilitates the AA adjustment to the motor
unit 1040 during the camera module assembling, so as to ensure the
consistency of the photosensitive axis of the camera module.
[0299] Those skilled in the art should understand that the
structures and forms of the camera module mentioned above are just
examples to describe ways of implementing the camera module, rather
than limitations of the present invention.
[0300] Referring to FIGS. 10A and 11, a photosensitive unit 1010A
and a camera module 10100A thereof according to a second preferred
embodiment of the present invention are illustrated. The
photosensitive unit 1010A is used for assembling and producing of
camera module 10100A, so as to obtain a molded camera module. The
photosensitive unit 1010A includes an encapsulation portion 1011A
and a photosensitive portion 1012A, wherein the encapsulation
portion 1011A is molded to connect with the photosensitive portion
1012A.
[0301] The photosensitive portion 1012A includes a main circuit
board 10122A and a photosensitive sensor 10121A, wherein the
photosensitive sensor 10121A is disposed on the main circuit board
10122A. According to the present embodiment of the present
invention, the photosensitive sensor 10121A is molded to connect to
the main circuit board 10122.
[0302] According to the present embodiment of the present
invention, the photosensitive portion 1012A includes a connecting
circuit and at least a circuit element 10123A. The connecting
circuit is prearranged in the main circuit board 10122A and the
circuit element 10123A is electrically connected to the connecting
circuit and the photosensitive sensor 10121A to process the
photosensing function for the photosensitive sensor 10121A. The
circuit element 10123A is protrudingly deployed on the main circuit
board 10122A. The circuit element 10123A can be, for example but
not limited to, resistors, capacitors, diodes, triodes,
potentiometers, electric relays, actuators, and/or etc.
[0303] It is worth mentioning that the encapsulation portion 1011A
encapsulates and wraps up the circuit element 10123A therein, so
that the circuit element 10123A will not directly exposed in any
space, and more specifically, not be exposed in the environment
that communicates with the photosensitive sensor 10121A. Therefore,
during the assembling of the camera module, the circuit element
10123A will not contaminate pollutions, such as dusts, or adversely
influence the photosensitive sensor 10121A. It is different from
the conventional camera module that the circuit element 10123A,
such as resistance-capacitance components, is exposed outside. The
enclosure and encapsulation of the photosensitive sensor 10121A by
molding, sundries and dusts are prevented from staying on the
surface of the circuit element 10123A that avoids the
photosensitive sensor 10121A from being contaminated and causes
dark spots and other defectives of the camera module.
[0304] The encapsulation portion 1011A forms a window 101100A to
provide a photosensitive path for the photosensitive sensor
10121A.
[0305] According to the present preferred embodiment of the present
invention, the photosensitive portion 1012A includes at least one
connecting element 10124A for electrically connecting the
photosensitive sensor 10121A with the main circuit board 10122A.
Further, the connecting element 10124A can be embodied to be, for
example but not limited to, gold wire, copper wire, aluminum wire,
and/or silver wire. Especially, the connecting elements 10124A
curvingly connect the photosensitive sensor 10121A and the main
circuit board 10122A. It is worth mentioning that the connecting
element 10124A is molded inside the encapsulation portion 1011A, so
that the connecting element(s) 10124A are enclosed, encapsulated
and/or wrapped up by the molded encapsulation portion 1011A that
keep them from direct exposure to the outside. Therefore, during
the assembling of the camera module, the connecting element(s)
10124A will not suffer any collision or damage, and, at the same
time, the influence by the environmental factors, such as
temperature, on the connecting element 10124A is reduced that
results in stabilization of the communication and connection
between the photosensitive sensor 10121A and the main circuit board
10122A. This is completely different from the prior art.
[0306] It is worth mentioning that the encapsulation portion 1011A
encapsulates and wraps up the circuit element 10123A and the
connecting element 10124A, which advantages in protecting the
circuit element 10123A and the connecting element 10124A as well as
obtaining a higher performance camera module. However, those
skilled in the art should understand that the encapsulation portion
1011A shall not be limited in wrapping up the circuit element
10123A and/or the connecting element 10124A. In other words, in
other embodiments of the present invention, the encapsulation
portion 1011A can be directly molded on main circuit board 10122A
without protruded circuit element 10123A or be molded on various
positions, such as the outer sides, the periphery, and etc., of the
circuit element 10123A.
[0307] This embodiment is an alternative mode of the above
preferred embodiment that, the main circuit board 10122A has an
inner groove 101222A and the photosensitive sensor 10121A is
installed in the inner groove 101222A, so as to reduce the relative
height of the photosensitive sensor 10121A and the main circuit
board 10122A. Therefore, when the encapsulation portion 1011A
covers and wraps up the photosensitive sensor 10121A, the height of
the encapsulation portion 1011A can be reduced that results in
reducing the height of the camera module assembled with the
photosensitive unit 1010A.
[0308] In addition, each of the photosensitive sensors 10121A has a
photosensitive area 101211A and a non-photosensitive area 101212A,
wherein the non-photosensitive area 101212A is positioned
surrounding the periphery of the photosensitive area 101211A. The
photosensitive area 101211A is adapted for processing
photosensitization. The connecting element 10124A is connected to
the non-photosensitive area 101212A.
[0309] According to the present preferred embodiment of the present
invention, the encapsulation portion 1011A is extended to mold on
the non-photosensitive area 101212A of the photosensitive sensor
10121A, so as to overlappedly mount the photosensitive sensor
10121A on the main circuit board 10122A by means of molding. Such
that, for example, by using the process of Molding on Chip (MOC) or
other molding technologies, the moldable area of the encapsulation
portion 1011A can be increased inwardly, so that the structural
portion 1011A the outer portions of the encapsulation portion 1011A
and the main circuit board 10122A can be reduced, which further
reduces the size in length and width of the photosensitive unit
1012A and reduces the size in length and width of the molded camera
module assembled thereby.
[0310] In the present embodiment of the present invention, the
encapsulation portion 1011A is protrudingly positioned surrounding
the outer portion of the photosensitive area 101211A of the
photosensitive sensor 10121A. Particularly, the encapsulation
portion 1011A integrally seals its connection, so as to provide a
great sealingness and tightness. Therefore, when the photosensitive
unit 1010A is used to assemble the camera module, the
photosensitive sensor 10121A will be sealed inside the camera
module to forms a sealed inner space.
[0311] Furthermore, the encapsulation portion 1011A includes a
covering section 10111A and an optical filter installing section
10112A. The optical filter installing section 10112A is molded
integrally to connect with the covering section 10111A. The
covering section 10111A is molded to attach on the main circuit
board 10122A for encapsulating and wrapping up the circuit element
10123A and the connecting element 10124A. The optical filter
installing section 10112A is arranged for installing an optical
filter 1020A. In other words, when the photosensitive unit 1010A is
used to assemble the camera module, the optical filter 1020A of the
camera module will be mounted at the optical filter installing
section 10112A, which makes the optical filter 1020A be positioned
along the photosensitive path of the photosensitive sensor 10121A
without the need of any additional mounting frame of the optical
filter 1020A. In other words, the encapsulation portion 1011A of
the present embodiment has a function as a conventional optical
filter frame while the top portion of the optical filter installing
section 10112A has a good evenness and smoothness by means of the
molding technique, that enables the optical filter 1020A to be
installed evenly, that is superior to conventional camera
modules.
[0312] In addition, the optical filter installing section 10112A
has an installing groove 101121A. The installing groove 101121A is
communicated with the window 101100A to provide an adequate
installation space for the optical filter 1020A such that the
optical filter 1020A will not protrude from the top surface 101122A
of the optical filter installing section 10112A. In other words,
the top of the encapsulation portion 1011A has the installing
groove 101121A provided therein for the optical filter 1020A to be
stably installed at the encapsulation portion 1011A without
protruding from the top of the encapsulation portion 1011A.
[0313] It is worth mentioning that the inner wall of the
encapsulation portion 1011A can be shaped according to the shape of
the connecting element. For example, it can be an inclined and
slope shape, so that the photosensitive sensor 10121A can receive
more light while the connecting element 10124A is encapsulated and
wrapped by the encapsulation portion 1011A. Person skilled in the
art should understand that a specific shape of the encapsulation
portion 1011A will not limit the scope of the present
invention.
[0314] Referring to FIG. 10B, an alternative mode of the above
second preferred embodiment of the present invention is
illustrated. The main circuit board 10122A of the photosensitive
unit 1010A has a sunken hole 101222A and the photosensitive sensor
10121A is sunkenly installed in the sunken hole 101222A, so as to
reduce the relative height of the photosensitive sensor 10121A and
the main circuit board 10122A. Therefore, when the encapsulation
portion 1011A covers and encloses, encapsulates and/or wraps up the
photosensitive sensor 10121A, the required height of the
encapsulation portion 1011A can be reduced that results in reducing
the height of the camera module assembled with the photosensitive
unit 1010A.
[0315] The sunken hole 101222A is a through hole structure
communicating the spaces of the two sides of the main circuit
board, such that the sunkable extent of the photosensitive sensor
10121A is increased. The relative height positions between the
photosensitive sensor 10121A and the main circuit board 10122A can
be decided based on the needs. For example, the height of the top
surfaces of the photosensitive sensor 10121A and the main circuit
board 10122A are consistent, the height of the bottom surfaces of
the photosensitive sensor 10121A and the main circuit board 10122A
are consistent, the heights of both the top and bottom surfaces of
the photosensitive sensor 10121A and the main circuit board 10122A
are inconsistent, and etc.
[0316] An end of the connecting element 10124A is connected to the
photosensitive sensor 10121A, while the other end of the connecting
element 10124A is connected to the main circuit board 10122A, which
is the peripheral area of the sunken hole 101222A, such that it
makes more area of the sunken hole 101222A available for deploying
the photosensitive sensor 10121A. Therefore, it can be suitable for
accommodating a larger photosensitive sensor 10121A or it can
reduce the area size of the sunken hole 101222A.
[0317] Referring to FIG. 11, the camera module 10100A according to
the above second preferred embodiment of the present invention is
illustrated. The camera module can be an automatic focus module.
The camera module includes one the photosensitive unit 1010A, one
the optical filter 1020A, and a camera lens 1030A.
[0318] The optical filter 1020A is installed at the photosensitive
unit 1010A, while the camera lens 1030A is mounted on the
photosensitive unit 1010A.
[0319] More specifically, the optical filter 1020A is installed at
the installing groove 1111A of the optical filter installing
section 10111A of the encapsulation portion 1011A of the
photosensitive unit 1010A. The camera lens 1030A is mounted on top
of the optical filter installing section 10111A of the
encapsulation portion 1011A of the photosensitive unit 1010A. In
other words, the optical filter 1020A is mounted in the installing
groove 1111A. The camera lens 1030A is mounted on top of the
encapsulation portion 1011A.
[0320] In other embodiments of the present invention, the
photosensitive unit 1010A can also be assembled in an automatic
focus camera module. Person skilled in the art should understand
that the fixed focus module is only an example for describing the
present invention, which shall not limit the present invention.
[0321] Referring to FIGS. 12 and 13, a photosensitive unit 1010B
and a camera module 10100B according to a third preferred
embodiment of the present invention is illustrated. The
photosensitive unit 1010B is used for assembling and producing of
camera module, so as to obtain a molded camera module. The
photosensitive unit 1010B includes an encapsulation portion 1011B
and a photosensitive portion 1012B, wherein the encapsulation
portion 1011B is molded to connect with the photosensitive portion
1012B.
[0322] The photosensitive portion 1012B includes a main circuit
board 10122B and a photosensitive sensor 10121B, wherein the
photosensitive sensor 10121B is disposed on the main circuit board
10122B. According to the present embodiment of the present
invention, the photosensitive sensor 10121B is molded to connect to
the main circuit board 10122.
[0323] According to the present embodiment of the present
invention, the photosensitive portion 1012B includes a connecting
circuit and at least a circuit element 10123B. The connecting
circuit is prearranged in the main circuit board 10122B and the
circuit element 10123B is electrically connected to the connecting
circuit and the photosensitive sensor 10121B to process the
photosensing function for the photosensitive sensor 10121B. The
circuit element 10123B is protrudingly deployed on the main circuit
board 10122B. The circuit element 10123B can be, for example but
not limited to, resistors, capacitors, diodes, triodes,
potentiometers, electric relays, actuators, or etc.
[0324] It is worth mentioning that the encapsulation portion 1011B
encapsulates and wraps up the circuit element 10123B therein, so
that the circuit element 10123B will not be directly exposed in any
space, and more specifically, not be exposed in the environment
that communicates with the photosensitive sensor 10121B. Therefore,
during the assembling of the camera module, the circuit element
10123B will not contaminate pollutions, such as dusts, or adversely
influence the photosensitive sensor 10121B. It is different from
the conventional camera module that the circuit element 10123B,
such as resistance-capacitance components, is exposed outside. The
enclosure and encapsulation of the photosensitive sensor 10121B by
molding, sundries and dusts are prevented from staying on the
surface of the circuit element 10123B that avoids the
photosensitive sensor 10121B from being contaminated and causes
dark spots and other defectives of the camera module.
[0325] The encapsulation portion 1011B forms a window 101100B to
provide a photosensitive path for the photosensitive sensor
10121B.
[0326] According to the present preferred embodiment of the present
invention, the photosensitive portion 1012B includes at least one
connecting element 10124B for electrically connecting the
photosensitive sensor 10121B with the main circuit board 10122B.
Further, the connecting element 10124B can be embodied to be, for
example but not limited to, gold wire, copper wire, aluminum wire,
and/or silver wire. Especially, the connecting elements 10124B
curvingly connect the photosensitive sensor 10121B and the main
circuit board 10122B.
[0327] It is worth mentioning that the connecting element 10124B is
molded within the encapsulation portion 1011B, so that the
encapsulation portion 1011B, encloses, encapsulates and/or wraps up
the connecting element(s) 10124B and keep them from direct exposure
to the outside. Therefore, during the assembling of the camera
module, the connecting element(s) 10124B will not suffer any
collision or damage, and, at the same time, it reduces the impact
due to the environmental factors, such as temperature, on the
connecting element 10124B and stabilizes the communication and
connection between the photosensitive sensor 10121B and the main
circuit board 10122B. This is completely absent in the traditional
art.
[0328] It is worth mentioning that the encapsulation portion 1011B
encapsulates and wraps up the circuit element 10123B and the
connecting element 10124B, which advantages in protecting the
circuit element 10123B and the connecting element 10124B as well as
obtaining a higher performance camera module. However, those
skilled in the art should understand that the encapsulation portion
1011B shall not be limited in wrapping up the circuit element
10123B and/or the connecting element 10124B. In other words, in
other embodiments of the present invention, the encapsulation
portion 1011B can be directly molded on main circuit board 10122B
without protruded circuit element 10123B or be molded on various
positions, such as the outer sides, the periphery, and etc., of the
circuit element 10123B.
[0329] In addition, each of the photosensitive sensors 10121B has a
photosensitive area 101211B and a non-photosensitive area 101212B,
wherein the non-photosensitive area 101212B is positioned
surrounding the periphery of the photosensitive area 101211B. The
photosensitive area 101211B is adapted for processing
photosensitization. The connecting element 10124B is connected to
the non-photosensitive area 101212B.
[0330] According to the present preferred embodiment of the present
invention, the encapsulation portion 1011B is extended to mold on
the non-photosensitive area 101212B of the photosensitive sensor
10121B, so as to overlappedly mount the photosensitive sensor
10121B on the main circuit board 10122B by means of molding. In
this manner, such as the method of Molding on Chip (MOC), the
moldable area of the encapsulation portion 1011B can be extended
inwardly, such that the structural portion outside of the
encapsulation portion 1011B and the main circuit board 10122B can
be reduced, that further reduces the size in length and width the
molded photosensitive portion 1012B and reduces the size in length
and width of the camera module assembled thereby.
[0331] In the present embodiment of the present invention, the
encapsulation portion 1011B is protrudingly positioned surrounding
the outer portion of the photosensitive area 101211B of the
photosensitive sensor 10121B. Particularly, the encapsulation
portion 1011B integrally seals its connection, so as to provide a
great sealingness and tightness. Therefore, when the photosensitive
unit 1010B is used to assemble the camera module, the
photosensitive sensor 10121B will be sealed inside the camera
module to forms a sealed inner space.
[0332] Particularly, in producing the photosensitive unit 1010B, a
conventional circuit board can be used to make the main circuit
board 10122B. The photosensitive sensor 10121B is deployed on the
main circuit board 10122B and electrically connected by the
connecting elements 10124B. Then, after the main circuit board
10122B and the photosensitive sensor 10121B are initially
assembled, they are processed by Surface Mount Technology (SMT) and
then molded by the insert molding technique, for example by means
of an injection molding machine, to form the encapsulation portion
1011B, or molded by the pressing molding technique, which is
commonly applied in semiconductor packaging, to form the
encapsulation portion 1011B. The main circuit board 10122B can
selectively be, for example but not limited to, rigid-flex board,
ceramic substrate (without flexible board), or rigid PCB (without
flexible board). The formation of the encapsulation portion 1011B
can be selected by, for example but not limited to, injection
molding technique and pressing molding technique. The material of
the encapsulation portion 1011B can be, for example but not limited
to, nylon, liquid crystal polymer (LCP), or polypropylene (PP) for
injection molding technique, or thermoplastic resin or
thermosetting resin for pressing molding technique. Person skilled
in the art should understand that the above available manufacture
methods and available materials are examples to describe available
implementations of the present invention, rather than limitations
of the present invention.
[0333] Furthermore, the top surface of the encapsulation portion
1011B is flat and smooth, and is adapted for mounting an optical
filter 1020B thereon. In other words, when the photosensitive unit
1010B is used in assembling the camera module, the optical filter
1020B of the camera module is mounted on the top surface of the
encapsulation portion 1011B, enabling the optical filter 1020B to
be arranged along the photosensitive path of the photosensitive
sensor 10121B without the need of any additional mounting frame for
the optical filter 1020B. In other words, the encapsulation portion
1011B also functions as a conventional independent mounting frame.
In addition, due to the advantage of molding technique, the molded
top portion of the encapsulation portion 1011B can take advantage
of the mold to achieve good evenness and smoothness, so that the
optical filter 1020B can be evenly installed, that is superior to
conventional camera module.
[0334] The differences between the present preferred embodiments
and the previous embodiment of the present invention, the
photosensitive portion 1012B of the photosensitive unit 1010B
further includes a reinforced layer 10125B overlappedly attached to
the bottom of the main circuit board 10122B, so as to reinforce the
structural strength of the main circuit board 10122B. In other
words, the reinforced layer 10125B is adhered on a position of the
bottom layer of the main circuit board 10122B corresponding to the
positions of the encapsulation portion 1011B and the photosensitive
sensor 10121B, so that the main circuit board 10122B can also
stably and reliably support the encapsulation portion 1011B and the
photosensitive sensor 10121B.
[0335] Furthermore, the reinforced layer 10125B is a metal plate
attaching on the bottom layer of the main circuit board 10122B to
increase the structural strength of the main circuit board 10122B
as well as to enhance the heat dissipation of the photosensitive
unit 1010B by effectively dissipating heat generated by the
photosensitive sensor 10121B.
[0336] It is worth mentioning that the main circuit board 10122B
can be Flex Print Circuit (FPC). By enhancing the rigidity of the
FPC with the reinforced layer 10125B, the FPC having excellent
flexural property can still fulfill the loading and supporting
requirement for the photosensitive unit 1010B. In other words, more
options of different circuit boards can be used as the main circuit
board 10122B, such as PCB (Printed Circuit Board), FPC (Flexible
Printed Circuit), and RF (Rigid Flex). By using the reinforced
layer 10125B to enhance the structural strength and heat
dissipation of the main circuit board 10122B, the thickness of the
main circuit board 10122B can thus be reduced, that enables the
height of the photosensitive unit 1010B to be further reduced.
Hence, the height of the camera module assembled thereby can be
reduced too.
[0337] It is worth mentioning that, according to the present
embodiment of the present invention, the reinforced layer 10125 is
overlapped on the main circuit board 10122B in a plane manner. In
other embodiments of the present invention, the reinforced layer
10125B can be extended to cover the side walls of the encapsulation
portion 1011B, so as to not only reinforce the structural strength
of the photosensitive unit 1010B, but also enhance an
anti-electromagnetic ability thereof.
[0338] It is worth mentioning that the inner wall of the
encapsulation portion can be shaped according to the shape of the
connecting element. For example, it can be an inclined and slope
shape, so that the photosensitive sensor 10121B can receive more
light while the connecting element 10124B is encapsulated and
wrapped by the encapsulation portion. Person skilled in the art
should understand that a specific shape of the encapsulation
portion 1011B will not limit the scope of the present
invention.
[0339] Referring to FIGS. 12-13, the camera module 10100B according
to the third preferred embodiment of the present invention is
illustrated. The camera module 10100B can be a fixed focus module
(FFM). The camera module includes one the photosensitive unit
1010B, one the optical filter 1020B, and a camera lens 1030B.
[0340] The optical filter 1020B is installed at the photosensitive
unit 1010B, while the camera lens 1030B is mounted on the
photosensitive unit 1010B.
[0341] More specifically, the optical filter 1020B is mounted on
top of encapsulation portion 1011B of the photosensitive unit
1010B. The camera lens 1030B is mounted on top of encapsulation
portion 1011B of the photosensitive unit 1010B. Particularly, the
specific installation positions of the optical filter 1020B and the
camera lens 1030B in the encapsulation portion 1011B can be
coordinated and arranged based on practical needs.
[0342] It is also worth mentioning that the camera lens 1030B is
supported on top portion of the encapsulation portion 1011B of the
photosensitive unit 1010B. Therefore, the encapsulation portion
1011B can also function as the independent mounting frame of a
conventional camera module to provide a supportive and holding site
for the camera lens 1030B, but it is assembled by technical process
different from the conventional COB technology. The independent
mounting frame of a camera module based on the conventional COB
technique is affixed on the circuit board by means of adhering, but
the encapsulation portion 1011B of the present invention is affixed
on the main circuit board 10122B by means of molding that does not
require the process of adhering and affixing. Contrasting to the
process of adhering and affixing, the process of molding provides
better connection stability and technological process
controllability. In addition, it does not have to reserve the
adhesive space between the encapsulation portion 1011B and the main
circuit board 10122B for AA adjustment. Therefore, it saves the
adhesive space of AA adjustment of conventional camera module, and
allows the thickness of the camera module to be further reduced.
Meanwhile, the encapsulation portion 1011B encapsulates and wraps
the circuit elements 10123B and the connecting elements 10124B,
that enables the function of the conventional mounting frame, the
circuit elements 10123B, and the connecting element 10124B can
spatially overlap without the need to reserve a safety distance
around the circuit components as in the conventional camera module.
As a result, the height of the encapsulation portion 1011B, which
functions as the independent mounting frame, can be arranged in a
smaller range, so as to further provide room for reducing the
thickness of the camera module. Besides, the encapsulation portion
1011B that substitutes the conventional mounting frame avoids any
tilt deviation occurred in attaching and assembling the mounting
frame as in the conventional camera module and to reduce the
accumulated tolerance of in assembling the camera module. In
addition, the encapsulation and wrapping up of the connecting
element(s) 10124B by the encapsulation portion 1011B and the inner
extension of the encapsulation portion 1011B towards the
non-photosensitive area 101212B of the photosensitive sensor 10121B
enables the size of the encapsulation portion 1011B can be shrunk
inwardly, so as to further decrease the lateral sizes in length and
width of the camera module.
[0343] Referring to FIGS. 12 and 14, an alternative mode of the
camera module according to the above third preferred embodiment of
the present invention is illustrated. The camera module 10100B can
be an automatic focus camera module. The camera module includes one
the photosensitive unit 1010B, one the optical filter 1020B, a
motor unit 1040B, and a camera lens 1030B.
[0344] The optical filter 1020B is mounted on the photosensitive
unit 1010B, while the camera lens 1030B is mounted on the motor
unit 1040B and the motor unit 1040B is mounted on the molded
photosensitive unit 1010B.
[0345] Furthermore, the optical filter 1020B is mounted on the top
portion of encapsulation portion 1011B of the photosensitive unit
1010B. The motor unit 1040B is mounted on the top portion of the
encapsulation portion 1011B of the photosensitive unit 1010B.
Particularly, the specific installation positions of the optical
filter 1020B and the motor unit 1040B at the encapsulation portion
1011B can be coordinated and arranged based on practical needs.
[0346] Those skilled in the art should understand that the
structures and forms of the camera module mentioned above are just
examples to describe ways of implementing the camera module, rather
than limitations of the present invention.
[0347] Referring to FIGS. 15 and 17, a camera module 10100C and a
photosensitive unit 1010C according to a fourth preferred
embodiment of the present invention is illustrated. The
photosensitive unit 1010C is used for assembling and producing of
camera module, so as to obtain a molded camera module. The
photosensitive unit 1010C includes an encapsulation portion 1011C
and a photosensitive portion 1012C, wherein the encapsulation
portion 1011C is molded to connect with the photosensitive portion
1012C.
[0348] The photosensitive portion 1012C includes a main circuit
board 10122C and a photosensitive sensor 10121C, wherein the
photosensitive sensor 10121C is disposed on the main circuit board
10122C. According to the present embodiment of the present
invention, the photosensitive sensor 10121C is molded to connect to
the main circuit board 10122.
[0349] According to the present embodiment of the present
invention, the photosensitive portion 1012C includes a connecting
circuit and at least a circuit element 10123C. The connecting
circuit is prearranged in the main circuit board 10122C and the
circuit element 10123C is electrically connected to the connecting
circuit and the photosensitive sensor 10121C to process the
photosensing function for the photosensitive sensor 10121C. The
circuit element 10123C is protrudingly deployed on the main circuit
board 10122C. The circuit element 10123C can be, for example but
not limited to, resistors, capacitors, diodes, triodes,
potentiometers, electric relays, actuators, or etc.
[0350] It is worth mentioning that the encapsulation portion 1011C
encapsulates and wraps up the circuit element 10123C therein, so
that the circuit element 10123C will not be directly exposed in any
space, and more specifically, not be exposed in the environment
that communicates with the photosensitive sensor 10121C. Therefore,
during the assembling of the camera module, the circuit element
10123C will not contaminate pollutions, such as dusts, or adversely
influence the photosensitive sensor 10121C. It is different from
the conventional camera module that the circuit element 10123C,
such as resistance-capacitance components, is exposed outside. The
enclosure and encapsulation of the photosensitive sensor 10121C by
molding, sundries and dusts are prevented from staying on the
surface of the circuit element 10123C that avoids the
photosensitive sensor 10121C from being contaminated and causes
dark spots and other defectives of the camera module.
[0351] The encapsulation portion 1011C forms a window 101100C to
provide a photosensitive path for the photosensitive sensor
10121C.
[0352] According to the present preferred embodiment of the present
invention, the photosensitive portion 1012C includes at least one
connecting element 10124C for electrically connecting the
photosensitive sensor 10121C with the main circuit board 10122C.
Further, the connecting element 10124C can be embodied to be, for
example but not limited to, gold wire, copper wire, aluminum wire,
and/or silver wire. Especially, the connecting elements 10124C
curvingly connect the photosensitive sensor 10121C and the main
circuit board 10122C.
[0353] It is worth mentioning that the connecting element 10124C is
molded within the encapsulation portion 1011C, so that the
encapsulation portion 1011C, encloses, encapsulates and/or wraps up
the connecting element(s) 10124C and keep them from direct exposure
to the outside. Therefore, during the assembling of the camera
module, the connecting element(s) 10124C will not suffer any
collision or damage, and, at the same time, it reduces the impact
due to the environmental factors, such as temperature, on the
connecting element 10124C and stabilizes the communication and
connection between the photosensitive sensor 10121C and the main
circuit board 10122C. This is completely absent in the traditional
art.
[0354] It is worth mentioning that the encapsulation portion 1011C
encapsulates and wraps up the circuit element 10123C and the
connecting element 10124C, which advantages in protecting the
circuit element 10123C and the connecting element 10124C as well as
obtaining a higher performance camera module. However, those
skilled in the art should understand that the encapsulation portion
1011C shall not be limited in wrapping up the circuit element
10123C and/or the connecting element 10124C. In other words, in
other embodiments of the present invention, the encapsulation
portion 1011C can be directly molded on main circuit board 10122C
without protruded circuit element 10123C or be molded on various
positions, such as the outer sides, the periphery, and etc., of the
circuit element 10123C.
[0355] In addition, each of the photosensitive sensors 10121C has a
photosensitive area 101211C and a non-photosensitive area 101212C,
wherein the non-photosensitive area 101212C is positioned
surrounding the periphery of the photosensitive area 101211C. The
photosensitive area 101211C is adapted for processing
photosensitization. The connecting element 10124C is connected to
the non-photosensitive area 101212C.
[0356] According to the present preferred embodiment of the present
invention, the encapsulation portion 1011C is extended to mold on
the non-photosensitive area 101212C of the photosensitive sensor
10121C, so as to overlappedly mount the photosensitive sensor
10121C on the main circuit board 10122C by means of molding. In
this manner, such as using the method of Molding on the Chip, the
moldable area of the encapsulation portion 1011C can be extended
inwardly, such that the structural portion of the outer portion of
the encapsulation portion 1011C and the main circuit board 10122C
can be reduced, that further reduces the size in length and width
of the photosensitive unit and reduces the size in length and width
of the camera module assembled thereby.
[0357] In the present embodiment of the present invention, the
encapsulation portion 1011C is protrudingly positioned surrounding
the outer portion of the photosensitive area 101211C of the
photosensitive sensor 10121C. Particularly, the encapsulation
portion 1011C integrally seals its connection, so as to provide a
great sealingness and tightness. Therefore, when the photosensitive
unit 1010C is used to assemble the camera module, the
photosensitive sensor 10121C will be sealed inside the camera
module to forms a sealed inner space.
[0358] Particularly, in producing the photosensitive unit 1010C, a
conventional circuit board can be used to make the main circuit
board 10122C. The photosensitive sensor 10121C is deployed on the
main circuit board 10122C and electrically connected by the
connecting elements 10124C. Then, after the main circuit board
10122C and the photosensitive sensor 10121C are initially
assembled, they are processed by Surface Mount Technology (SMT) and
then molded by the insert molding technique, for example by means
of an injection molding machine, to form the encapsulation portion
1011C, or molded by the pressing molding technique, which is
commonly applied in semiconductor packaging, to form the
encapsulation portion 1011C. The main circuit board 10122C can
selectively be, for example but not limited to, rigid-flex board,
ceramic substrate (without flexible board), or rigid PCB (without
flexible board). The formation of the encapsulation portion 1011C
can be selected by, for example but not limited to, injection
molding technique and pressing molding technique. The material of
the encapsulation portion 1011C can be, for example but not limited
to, nylon, liquid crystal polymer (LCP), or polypropylene (PP) for
injection molding technique, or thermoplastic resin or
thermosetting resin for pressing molding technique. Person skilled
in the art should understand that the above available manufacture
methods and available materials are examples to describe available
implementations of the present invention, rather than limitations
of the present invention.
[0359] The photosensitive unit 1010C further includes an optical
filter 1020C, wherein the optical filter 1020C is molded to be
overlappedly disposed on the photosensitive sensor 10121C. The
edges of the optical filter 1020C are molded by the encapsulation
portion 1011C so as to affix the optical filter 1020C in position.
It is worth mentioning that the optical filter 1020C covers on the
photosensitive sensor 10121C and insulates the photosensitive
sensor 10121C from the external environment to protect the
photosensitive sensor 10121C from damage and prevent dusts from
entering therein.
[0360] To produce the photosensitive unit 1010C, the photosensitive
sensor 10121C is firstly adhered on the main circuit board 10122C
and the connecting element 124C is connected with the
photosensitive sensor 10121C and the main circuit board 10122C.
Then, the optical filter 1020C is adhered on the photosensitive
sensor 10121C. Thereafter, the main circuit board, the
photosensitive sensor 10121C, and the optical filter 1020C are
molded to form the encapsulation portion 1011C. During the molding
process, since the optical filter 1020C covers on top of the
photosensitive sensor 10121C, any damage caused by the molding mold
to the photosensitive sensor 10121C can be prevented. In addition,
because the distance between the optical filter 1020C and the
photosensitive sensor 10121C is shortened, the back focal length of
the camera module assembled thereby can also be shortened, so that
the height of the camera module is reduced too. On the other hand,
since there is no need to provide an additional supporting
component for the optical filter 1020C, the thickness of the camera
module can be further reduced.
[0361] It is worth mentioning that the inner wall of the
encapsulation portion 1010C can be shaped with respect to the
object such as the optical filter to be connected. For example, it
can be in an inclined or slope shape, so that while the connecting
elements 10124C are encapsulated and wrapped, the photosensitive
sensor 10121C can still receive more light through the window and
the installing groove. Person skilled in the art should understand
that a specific shape of the encapsulation portion 1011C will not
limit the scope of the present invention.
[0362] Referring to FIGS. 15-17, the camera module 10100C according
to the fourth preferred embodiment of the present invention is
illustrated. The camera module can be an automatic focus module.
The camera module includes one the photosensitive unit 1010C and a
camera lens 1030C. The camera lens 1030C is mounted on the
photosensitive unit 1010C for assembling to form the camera
module.
[0363] Especially, the camera lens 1030C can be affixed on top of
the encapsulation portion 1011C of the photosensitive unit 1010C by
means of adhering. In addition, taking advantage of the features of
the molding production in the molding technique, the top portion of
the encapsulation portion 1011C can have a better evenness and
smoothness that provides an excellent installation condition for
the camera lens 1030C, so as to achieve a high quality camera
module.
[0364] It is worth mentioning that the camera lens 1030C is
supported on top of the encapsulation portion 1011C of the
photosensitive unit 1010C. Therefore, the encapsulation portion
1011C itself functions as the independent mounting frame of a
conventional camera module to provide supportive and holding site
for the camera lens 1030C, but it is assembled by different
technical process from the conventional COB technology. The
independent mounting frame of a camera module based on the
conventional COB technique is affixed on the circuit board by means
of adhering, but the encapsulation portion 1011C of the present
invention is affixed on the main circuit board 10122C by means of
molding that does not require the process of adhering and affixing.
Contrasting to the process of adhering and affixing, the process of
molding provides better connection stability and technological
process controllability. In addition, it does not have to reserve
the adhesive space between the encapsulation portion 1011C and the
main circuit board 10122C for AA adjustment. Therefore, it saves
the adhesive space of AA adjustment of conventional camera module,
and allows the thickness of the camera module to be further
reduced. Meanwhile, the encapsulation portion 1011C encapsulates
and wraps the circuit elements 10123C and the connecting elements
10124C, that enables the function of the conventional mounting
frame, the circuit elements 10123C, and the connecting element
10124C can spatially overlap without the need to reserve a safety
distance around the circuit components as in the conventional
camera module. As a result, the height of the encapsulation portion
1011C, which functions as the independent mounting frame, can be
arranged in a smaller range, so as to further provide room for
reducing the thickness of the camera module. Besides, the
encapsulation portion 1011C that substitutes the conventional
mounting frame avoids any tilt deviation occurred in attaching and
assembling the mounting frame as in the conventional camera module
and to reduce the accumulated tolerance of in assembling the camera
module. In addition, the encapsulation and wrapping up of the
connecting element(s) 10124C by the encapsulation portion 1011C and
the inner extension of the encapsulation portion 1011C towards the
non-photosensitive area 101212C of the photosensitive sensor 10121C
enables the size of the encapsulation portion 1011C can be shrunk
inwardly, so as to further decrease the lateral sizes in length and
width of the camera module. Also, the photosensitive unit 1010C
molds the optical filter 1020C therein, so when assembling the
camera module, in it is not necessary to conduct one more optical
filter attachment process. As a result, the assembling
technological process of the camera module can be minimized while
the efficiency can be enhanced. These are both superior to the
traditional art.
[0365] Referring to FIGS. 15, 16, and 18, an alternative mode of
the camera module 10100C according to the above fourth preferred
embodiment of the present invention is illustrated. The camera
module can be an automatic focus camera module (AFM). The camera
module includes one the photosensitive unit 1010C, one the motor
unit 1040C, and a camera lens 1030C.
[0366] The camera lens 1030C is installed on the motor unit 1040C.
The motor unit 1040C is installed on the photosensitive unit 1010C,
so as to allow focal length adjustment of the camera module through
the motor unit 1040C. The motor unit 1040C is mounted on the top
portion of the encapsulation portion 1011C of the photosensitive
unit 1010C.
[0367] Those skilled in the art should understand that the
structures and forms of the camera module mentioned above are just
examples to describe ways of implementing the camera module, rather
than limitations of the present invention.
[0368] Referring to FIGS. 19A and 20A, the photosensitive unit
1010D and camera module 10100D according to a fifth preferred
embodiment of the present invention are illustrated. The
photosensitive unit 1010D is adapted for assembling and producing
camera module to achieve the molded camera module. The
photosensitive unit 1010D includes an encapsulation portion 1011D
and a photosensitive portion 1012D, wherein the encapsulation
portion 1011D is molded to connect with the photosensitive portion
1012D.
[0369] Especially, the encapsulation portion is molded to couple to
the photosensitive portion 1012D with the method of MOC.
[0370] The photosensitive portion 1012D includes a main circuit
board 10122D and a photosensitive sensor 10121D, wherein the
photosensitive sensor 10121D is disposed on the main circuit board
10122D. According to the present embodiment of the present
invention, the photosensitive sensor 10121D is molded to connect to
the main circuit board 10122D.
[0371] According to the present embodiment of the present
invention, the photosensitive portion 1012D includes a connecting
circuit and at least a circuit element 10123D. The connecting
circuit is prearranged in the main circuit board 10122D and the
circuit element 10123D is electrically connected to the connecting
circuit and the photosensitive sensor 10121D to process the
photosensing function for the photosensitive sensor 10121D. The
circuit element 10123D is protrudingly deployed on the main circuit
board 10122D. The circuit element 10123D can be, for example but
not limited to, resistors, capacitors, diodes, triodes,
potentiometers, electric relays, actuators, or etc. It is worth
mentioning that the encapsulation portion 1011D encapsulates and
wraps up the circuit element 10123D therein, so that the circuit
element 10123D will not be directly exposed in any space, and more
specifically, not be exposed in the environment that communicates
with the photosensitive sensor 10121D. Therefore, during the
assembling of the camera module, the circuit element 10123D will
not contaminate pollutions, such as dusts, or adversely influence
the photosensitive sensor 10121D. It is different from the
conventional camera module that the circuit element 10123D, such as
resistance-capacitance components, is exposed outside. The
enclosure and encapsulation of the photosensitive sensor 10121D by
molding, sundries and dusts are prevented from staying on the
surface of the circuit element 10123D that avoids the
photosensitive sensor 10121D from being contaminated and causes
dark spots and other defectives of the camera module.
[0372] The encapsulation portion 1011D forms a window 101100D to
provide a photosensitive path for the photosensitive sensor
10121D.
[0373] According to the present fifth preferred embodiment of the
present invention, the photosensitive portion 1012D includes at
least one connecting element 10124D for electrically connecting the
photosensitive sensor 10121D with the main circuit board 10122D.
Further, the connecting element 10124D can be embodied to be, for
example but not limited to, gold wire, copper wire, aluminum wire,
and/or silver wire. Especially, the connecting elements 10124D
curvingly connect the photosensitive sensor 10121D and the main
circuit board 10122D.
[0374] It is worth mentioning that the connecting element 10124D is
molded inside the encapsulation portion 1011D, so that the
connecting element(s) 10124D are enclosed, encapsulated and/or
wrapped up by the molded encapsulation portion 1011D that keep them
from direct exposure to the outside. Therefore, during the
assembling of the camera module, the connecting element(s) 10124D
will not suffer any collision or damage, and, at the same time, the
influence by the environmental factors, such as temperature, on the
connecting element 10124D is reduced that results in stabilization
of the communication and connection between the photosensitive
sensor 10121D and the main circuit board 10122D. This is completely
different from the prior art.
[0375] It is worth mentioning that the encapsulation portion 1011D
encapsulates and wraps up the circuit element 10123D and the
connecting element 10124D, which advantages in protecting the
circuit element 10123D and the connecting element 10124D as well as
obtaining a higher performance camera module. However, those
skilled in the art should understand that the encapsulation portion
1011D shall not be limited in wrapping up the circuit element
10123D and/or the connecting element 10124D. In other words, in
other embodiments of the present invention, the encapsulation
portion 1011D can be directly molded on main circuit board 10122D
without protruded circuit element 10123D or be molded on various
positions, such as the outer sides, the periphery, and etc., of the
circuit element 10123D.
[0376] The photosensitive unit 1010D further includes an optical
filter 1020D, wherein the optical filter 1020D is molded to
overlappedly disposed on the photosensitive sensor 10121D. The
edges of the optical filter 1020D are molded by the encapsulation
portion 1011D so as to affix the optical filter 1020D in position.
It is worth mentioning that the optical filter 1020D covers on the
photosensitive sensor 10121D and insulates the photosensitive
sensor 10121D from the external environment to protect the
photosensitive sensor 10121D from damage and prevent dusts from
entering therein.
[0377] In addition, each of the photosensitive sensors 10121D has a
photosensitive area 101211D and a non-photosensitive area 101212D,
wherein the non-photosensitive area 101212D is positioned
surrounding the periphery of the photosensitive area 101211D. The
photosensitive area 101211D is adapted for processing
photosensitization. The connecting element 10124D is connected to
the non-photosensitive area 101212D.
[0378] According to the present preferred embodiment of the present
invention, the encapsulation portion 1011D is extended to mold on
the non-photosensitive area 101212D of the photosensitive sensor
10121D, so as to overlappedly mount the photosensitive sensor
10121D on the main circuit board 10122D by means of molding. In
this manner, such as the method of Molding on Chip (MOC), the
molding area of the encapsulation portion 1011D can be extended
inwardly, so that the outer structural portions of the
encapsulation portion 1011D and the main circuit board 10122D can
be reduced, which further reduces the size in length and width of
the photosensitive portion 1012D as well as the size in length and
width of the camera module assembled thereby.
[0379] In the present embodiment of the present invention, the
encapsulation portion 1011D is protrudingly positioned surrounding
the outer portion of the photosensitive area 101211D of the
photosensitive sensor 10121D. Particularly, the encapsulation
portion 1011D integrally seal its connection, so as to provide a
great sealingness and tightness. Therefore, when the photosensitive
unit 1010D is used to assemble the camera module, the
photosensitive sensor 10121D will be sealed inside the camera
module to forms a sealed inner space.
[0380] Particularly, in producing the photosensitive unit 1010D, a
conventional circuit board can be used to make the main circuit
board 10122D. The photosensitive sensor 10121D is deployed on the
main circuit board 10122D and electrically connected by the
connecting elements 10124D. Then, after the main circuit board
10122D and the photosensitive sensor 10121D are initially
assembled, they are processed by Surface Mount Technology (SMT) and
then molded by the insert molding technique, for example by means
of an injection molding machine, to form the encapsulation portion
1011D, or molded by the pressing molding technique, which is
commonly applied in semiconductor packaging, to form the
encapsulation portion 1011D. The main circuit board 10122D can
selectively be, for example but not limited to, rigid-flex board,
ceramic substrate (without flexible board), or rigid PCB (without
flexible board). The formation of the encapsulation portion 1011D
can be selected by, for example but not limited to, injection
molding technique and pressing molding technique. The material of
the encapsulation portion 1011D can be, for example but not limited
to, nylon, liquid crystal polymer (LCP), or polypropylene (PP) for
injection molding technique, or thermoplastic resin or
thermosetting resin for pressing molding technique. Person skilled
in the art should understand that the above available manufacture
methods and available materials are examples to describe available
implementations of the present invention, rather than limitations
of the present invention.
[0381] Furthermore, the encapsulation portion 1011D includes a
covering section 10111D, an optical filter installing section
10112D and a camera lens installing section 10113D. The optical
filter installing section 10112D and the camera lens installing
section 10113D are molded with the covering section 10111D in order
to form an integral body. The covering section 10111D is molded on
the main circuit board 10122D to wrap up and enclose the circuit
element 10123D and the connecting element 10124D. The camera lens
installing section 10113D is for mounting a camera lens 1030D
thereon. In other words, when the photosensitive unit 1010D is used
in assembling the camera module, the camera lens 1030D is mounted
within the camera lens installing section 10113D of the
encapsulation portion 1011D, which provides a stable mounting site
for the camera lens 1030D. The camera lens installing section
10113D defines a lens installing grooves 101131D. The lens
installing groove 101131D is communicated with the window 101100D
and provides adequate installation space for the camera lens 1030D.
In other words, the encapsulation portion 1011D provides an optical
filter installing groove 101121D and the lens installing groove
101131D. The optical filter 1020D is molded in the installing
groove 101121D. The camera lens 1030D is installed in the lens
installing groove 101131D. Referring to FIGS. 19A and 20, the
optical filter 1020D is integrally encapsulated on the covering
section of the encapsulation portion 1011. In this case, it does
not require providing the installing groove 101121D.
[0382] The camera lens installing section 10113D is integrally
extended upwards to form a step structure therein, so as to provide
a supportive mounting site for the camera lens 1030D, so that it
does not require extra component for the installation of the camera
lens 1030D. In other words, the encapsulation portion 1011D is
molded to integrally extend upward and forms an internal step shape
structure to encapsulate and to support the camera lens 30D and to
support the camera lens.
[0383] The tubular camera lens installing section 10113D has a
camera lens inner wall 101132D. The camera lens inner wall 101132D
is in close ring shape and adapted for providing an installation
room for the camera lens 1030D. It is worth mentioning that the
surface of the camera lens inner wall 101132D of the camera lens
installing section 10113D is flat and smooth, which is adapted for
installing the camera lens 1030D that is thread less to form a
fixed focus module. Particularly, the camera lens 1030D can be
secured in the camera lens installing section 10113D by adhering.
Certainly, the camera lens inner wall 201132 can also be in an open
ring shape. Therefore, it can be a ring structure with opening(s).
Hence, person skilled in the art should understand that the
structure of the camera lens inner wall 101132D shall not limit the
scope of the present invention.
[0384] It is worth mentioning that the inner wall of the covering
section 10111D of the encapsulation portion 1011D can be shaped
according to the shape of the connecting element. For example, it
can be inclined and slope shape, so that the encapsulation portion
11D not only encapsulates and wrap up the connecting elements
10124D, but also ensure the photosensitive sensor 10121D can
receive more light through the window 1100D. Person skilled in the
art should understand that a specific shape of the encapsulation
portion 1011D will not limit the scope of the present
invention.
[0385] Referring to FIG. 19B, an alternative mode of the fifth
preferred embodiment of the present invention is illustrated,
wherein the encapsulation portion 1011D of the photosensitive unit
1010D comprises a covering section 10111D, an optical filter
installing section 10112D, and a camera lens installing section
10113D. The optical filter installing section 10112D and the camera
lens installing section 10113D are molded integrally and upwardly
to extend from the covering section 10111D orderly. The covering
section 10111D is molded to attach on the main circuit board 10122D
for encapsulating, wrapping up, and covering the circuit elements
10123D and the connecting elements 10124D. The camera lens
installing section 10113D is for mounting a camera lens 1030D
thereon. In other words, when the photosensitive unit 1010D is used
in assembling the camera module, the camera lens 1030D is mounted
within the camera lens installing section 10113D of the
encapsulation portion 1011D, which provides a stable mounting site
for the camera lens 1030D. The camera lens installing section
10113D defines a lens installing grooves 101131D. The lens
installing groove 101131D is communicated with the window 101100D
and provides adequate installation space for the camera lens 1030D.
In other words, the encapsulation portion 1011D provides an
installing groove 101121D and the lens installing groove 101131D.
The optical filter 1020D is molded in the installing groove
101121D. The camera lens 1030D is installed in the lens installing
groove 101131D.
[0386] The camera lens installing section 10113D is integrally
extended upwards to form a step structure therein, so as to provide
a supportive mounting site for the camera lens 1030D, so that it
does not require extra component for the installation of the camera
lens 1030D. In other words, the encapsulation portion 1011D is
molded to integrally extend upward and forms an internal step shape
structure to encapsulate the circuit elements 10123D and the
connecting element 1020D and to provide installation sites for the
optical filter 1020D and the camera lens 1030D. The camera lens
installing section 10113D limits the space of the camera lens and
the motor unit 1040, such that the camera lens 1030D or the motor
unit 1040D can be fast and accurately mounted on the corresponding
position.
[0387] The height and structure of the camera lens installing
section 10113D can be arranged based on the needs, which can be a
closed cylinder structure or a spacing wall or spacing column with
gap.
[0388] Referring to FIG. 20A, the camera module 10100D according to
the fifth preferred embodiment of the present invention is
illustrated. The camera module can be an automatic focus module.
The camera module includes one the photosensitive unit 1010D and
one the camera lens 1030D.
[0389] More specifically, the camera lens 1030D is installed in the
lens installing groove 101131D of the camera lens installing
section 10113D of the encapsulation portion 1011D of the
photosensitive unit 1010D. The optical filter 1020D is molded on
the photosensitive unit 1011D. Therefore, no additional independent
optical filter is required and it is unnecessary to further
separately install the optical filter when assembling the camera
module. Hence, the assembling processes can be reduced and the back
focal length of the camera module can be decreased due to the
molded optical filter arrangement of the present invention.
[0390] It is also worth mentioning that the camera lens 1030D is
supported in the camera lens installing section 10113D of the
encapsulation portion 1011D of the photosensitive unit 1010D.
Therefore, the encapsulation portion 1011D would be functioned as
the mounting frame or lens barrel of the conventional camera module
to provide a supportive and holding site for the camera lens 1030D,
but the present invention is assembled by different technical
process from conventional COB technology. The mounting frame of the
conventional camera module based on conventional COB technique is
affixed on the circuit board by adhesive, but the encapsulation
portion 1011D of the present invention is affixed on the main
circuit board 10122D by means of molding technique that does not
require the adhering and affixing process. The molding method with
respect to the conventional adhering and affixing method has better
connection stability and technological process controllability.
Besides, it does not have to reserve any adhesive space between the
encapsulation portion 1011D and the main circuit board 10122D for
AA adjustment, and thus saves the adhesive space of AA adjustment
for conventional camera module, which allows the thickness of the
camera module to be further reduced. Also, the encapsulation
portion 1011D according to the molding arrangement of the present
invention has better smoothness and evenness, so that when
assembling the camera module, it is unnecessary to conduct AA
adjustment. Furthermore, the encapsulation portion 1011D, which
encapsulates and wraps the circuit elements 10123D and the
connecting elements 10124D therein, allows the function of the
conventional mounting frame, the circuit elements 10123D and the
connecting element 10124D being spatially overlapped by molding to
fill all the space between the components including the circuit
elements 10123D and the connecting elements 10124D to form a solid
body, that is distinctive from the conventional camera module that
requires to reserve safety distance around all the circuit
components. As a result, the height of the encapsulation portion
1011D that can be functioned as the mounting frame can be arranged
in a smaller range, so as to further provide room for reducing the
thickness of the camera module. Besides, the encapsulation portion
1011D eliminates the conventional mounting frame but provides
installing site for the camera lens 1030D by itself, that avoids
any tilt deviation generally occurred in attaching and assembling
the conventional mounting frame and reduces the accumulated
tolerance during the assembling of the camera module. In addition,
the encapsulation and wrapping up of the connecting element(s)
10124D by the encapsulation portion 1011D and the inner extension
of the encapsulation portion 1011D towards the non-photosensitive
area 101212D of the photosensitive sensor 10121D enables the size
of the encapsulation portion 1011D can be shrunk inwardly, so as to
further decrease the lateral sizes in length and width of the
camera module.
[0391] FIG. 20B is a camera module 10100D according to an
alternative mode of the above fifth preferred embodiment of the
present invention. Furthermore the encapsulation portion 1011D
includes a covering section 10111D, an optical filter installing
section 10112D, and a protruding 10113D. The optical filter
installing section 10112D and the protruding 10113D are orderly
molded with the covering section 10111D in order to form an
integral body. The covering section 10111D is molded on the main
circuit board 10122D to wrap up and enclose the circuit element
10123D and the connecting element 10124D.
[0392] The protruding 10113D is partially upwardly extended from
the optical filter installing section 1112D. Also, the optical
filter installing section 10112D forms an outer installing groove
101131D, so as for installing the camera lens 1030D or the motor
unit 1040D. Namely, the protruding 10113D separates the
installation site of the camera lens 1030D or the motor unit 1040D
from the inner space of the photosensitive unit 1010D, so as to
avoid the gluing medium, such as the adhesive and etc., of the
camera lens 1030D or the motor unit 1040D from being spread to the
inner space and polluting the lens of the camera lens 1030D or the
interior of the camera module. In other words, the encapsulation
portion 1011D provides an installing groove 101121D and one the
outer installing groove 101131D. The installing groove 101121 is
provided on the inner side thereof for installing the optical
filter 1020D, while the outer installing groove 101131D is provided
on the outer side thereof for installing the camera lens 1030D or
the motor unit 1040D.
[0393] Referring to FIGS. 21 and 22, the photosensitive unit 1010E
and camera module 10100E according to a sixth preferred embodiment
of the present invention are illustrated. The photosensitive unit
1010E is adapted for assembling and producing camera module to
achieve the molded camera module. The photosensitive unit 1010E
includes an encapsulation portion 1011E and a photosensitive
portion 1012E, wherein the encapsulation portion 1011E is molded to
connect with the photosensitive portion 1012E.
[0394] The photosensitive portion 1012E includes a main circuit
board 10122E and a photosensitive sensor 10121E, wherein the
photosensitive sensor 10121E is disposed on the main circuit board
10122E. According to the present embodiment of the present
invention, the photosensitive sensor 10121E is molded to connect to
the main circuit board 10122.
[0395] According to the present embodiment of the present
invention, the photosensitive portion 1012E includes a connecting
circuit and at least a circuit element 10123E. The connecting
circuit is prearranged in the main circuit board 10122E and the
circuit element 10123E is electrically connected to the connecting
circuit and the photosensitive sensor 10121E to process the
photosensing function for the photosensitive sensor 10121E. The
circuit element 10123E is protrudingly deployed on the main circuit
board 10122E. The circuit element 10123E can be, for example but
not limited to, resistors, capacitors, diodes, triodes,
potentiometers, electric relays, actuators, and/or etc.
[0396] It is worth mentioning that the encapsulation portion 1011E
encapsulates and wraps up the circuit element 10123E therein, so
that the circuit element 10123E will not be directly exposed in any
space, and more specifically, not be exposed in the environment
that communicates with the photosensitive sensor 10121E. Therefore,
during the assembling of the camera module, the circuit element
10123E will not contaminate pollutions, such as dusts, or adversely
influence the photosensitive sensor 10121E. It is different from
the conventional camera module that the circuit element 10123E,
such as resistance-capacitance components, is exposed outside. The
enclosure and encapsulation of the photosensitive sensor 10121E by
molding, sundries and dusts are prevented from staying on the
surface of the circuit element 10123E that avoids the
photosensitive sensor 10121E from being contaminated and causes
dark spots and other defectives of the camera module.
[0397] The encapsulation portion 1011E forms a window 101100E to
provide a photosensitive path for the photosensitive sensor
10121E.
[0398] According to the present fifth preferred embodiment of the
present invention, the photosensitive portion 1012E includes at
least one connecting element 10124E for electrically connecting the
photosensitive sensor 10121E with the main circuit board 10122E.
Further, the connecting element 10124E can be embodied to be, for
example but not limited to, gold wire, copper wire, aluminum wire,
and/or silver wire. Especially, the connecting elements 10124E
curvingly connects the photosensitive sensor 10121E and the main
circuit board 10122E.
[0399] It is worth mentioning that the connecting element 10124E is
molded within the encapsulation portion 1011E, so that the
encapsulation portion 1011E, encloses, encapsulates and/or wraps up
the connecting element(s) 10124E and keep them from direct exposure
to the outside. Therefore, during the assembling of the camera
module, the connecting element(s) 10124E will not suffer any
collision or damage, and, at the same time, it reduces the impact
due to the environmental factors, such as temperature, on the
connecting element 10124E and stabilizes the communication and
connection between the photosensitive sensor 10121E and the main
circuit board 10122E. This is completely absent in the traditional
art.
[0400] It is worth mentioning that the encapsulation portion 1011E
encapsulates and wraps up the circuit element 10123E and the
connecting element 10124E, which advantages in protecting the
circuit element 10123E and the connecting element 10124E as well as
obtaining a higher performance camera module. However, those
skilled in the art should understand that the encapsulation portion
1011E shall not be limited in wrapping up the circuit element
10123E and/or the connecting element 10124E. In other words, in
other embodiments of the present invention, the encapsulation
portion 1011E can be directly molded on main circuit board 10122E
without protruded circuit element 10123E or be molded on various
positions, such as the outer sides, the periphery, and etc., of the
circuit element 10123E.
[0401] The photosensitive unit 1010E further includes an optical
filter 1020E, wherein the optical filter 1020E is molded to be
overlappedly disposed on the photosensitive sensor 10121E. The
edges of the optical filter 1020E are molded by the encapsulation
portion 1011E so as to affix the optical filter 1020E in position.
It is worth mentioning that the optical filter 1020E covers on the
photosensitive sensor 10121E and insulates the photosensitive
sensor 10121E from the external environment to protect the
photosensitive sensor 10121E from damage and prevent dusts from
entering therein.
[0402] In addition, each of the photosensitive sensors 10121E has a
photosensitive area 101211E and a non-photosensitive area 101212E,
wherein the non-photosensitive area 101212E is positioned
surrounding the periphery of the photosensitive area 101211E. The
photosensitive area 101211E is adapted for processing
photosensitization. The connecting element 10124E is connected to
the non-photosensitive area 101212E.
[0403] According to the present preferred embodiment of the present
invention, the encapsulation portion 1011E is extended to mold on
the non-photosensitive area 101212E of the photosensitive sensor
10121E, so as to overlappedly mount the photosensitive sensor
10121E on the main circuit board 10122E by means of molding. In
this manner, such as by the method of Molding on Chip, the moldable
area of the encapsulation portion 1011E can be extended inwardly,
such that the outer structural portion of the encapsulation portion
1011E and the main circuit board 10122E can be reduced, which
further reduces the size in length and width of the molded
photosensitive portion 1012E and reduces the size in length and
width of the camera module assembled thereby.
[0404] In the present embodiment of the present invention, the
encapsulation portion 1011E is protrudingly positioned surrounding
the outer portion of the photosensitive area 101211E of the
photosensitive sensor 10121E. Particularly, the encapsulation
portion 1011E integrally seal its connection, so as to provide a
great sealingness and tightness. Therefore, when the photosensitive
unit 1010E is used to assemble the camera module, the
photosensitive sensor 10121E will be sealed inside the camera
module to forms a sealed inner space.
[0405] Particularly, in producing the photosensitive unit 1010E, a
conventional circuit board can be used to make the main circuit
board 10122E. The photosensitive sensor 10121E is deployed on the
main circuit board 10122E and electrically connected by the
connecting elements 10124E. Then, after the main circuit board
10122E and the photosensitive sensor 10121E are initially
assembled, they are processed by Surface Mount Technology (SMT) and
then molded by the insert molding technique, for example by means
of an injection molding machine, to form the encapsulation portion
1011E, or molded by the pressing molding technique, which is
commonly applied in semiconductor packaging, to form the
encapsulation portion 1011E. The main circuit board 10122E can
selectively be, for example but not limited to, rigid-flex board,
ceramic substrate (without flexible board), or rigid PCB (without
flexible board). The formation of the encapsulation portion 1011E
can be selected by, for example but not limited to, injection
molding technique and pressing molding technique. The material of
the encapsulation portion 1011E can be, for example but not limited
to, nylon, liquid crystal polymer (LCP), or polypropylene (PP) for
injection molding technique, or thermoplastic resin or
thermosetting resin for pressing molding technique. Person skilled
in the art should understand that the above available manufacture
methods and available materials are examples to describe available
implementations of the present invention, rather than limitations
of the present invention.
[0406] Furthermore, the encapsulation portion 1011E includes a
covering section 10111E and a camera lens installing section
10113E. The camera lens installing section 10113E is integrally
molded to be mounted on the covering section 10111E. The covering
section 10111E is molded to attach on the main circuit board 10122E
for encapsulating and wrapping up the circuit element 10123E and
the connecting element 10124E. The camera lens installing section
10113E is for mounting a camera lens 1030E thereon. In other words,
when the photosensitive unit 1010E is used in assembling the camera
module, the camera lens 1030E is mounted within the camera lens
installing section 10113E of the encapsulation portion 1011E, which
provides a stable mounting site for the camera lens 1030E.
[0407] The camera lens installing section 10113E defines a lens
installing grooves 101131E. The lens installing groove 101131E is
communicated with the window 101100E and provides adequate
installation space for the camera lens 1030E. In other words, the
encapsulation portion has one the lens installing groove 101131E,
while the camera lens 1030E is mounted on the lens installing
groove 101131E.
[0408] The camera lens installing section 10113E is integrally
extended upwards along the covering portion 10111E to form a step
structure therein, so as to provide a supportive mounting site for
the camera lens 1030E, so that it does not require extra component
for the installation of the camera lens 1030E. In other words, the
encapsulation portion 1011E is molded to integrally extend upward
and forms an internal step shape structure to encapsulate and to
support the camera lens 10124E, and to support the camera lens
1030E.
[0409] The tubular camera lens installing section 10113E has a
camera lens inner wall 101132E. The camera lens inner wall 101132E
is in close ring shape and adapted for providing an installation
room for the camera lens 1030E. It is worth mentioning that the
surface of the camera lens inner wall 101132E of the camera lens
installing section 10113E has a thread structure, which is adapted
for installing the camera lens 1030E with thread to form a fixed
focus module. Particularly, the camera lens 1030E can be secured in
the camera lens installing section 10113E by screwing.
[0410] It is worth mentioning that the inner wall of the covering
section 10111E of the encapsulation portion 1011 can be shaped
according to the shape of the connecting element. For example, it
can be inclined and slope shape, so that the encapsulation portion
not only encapsulates and wraps up the connecting elements 10124E,
but also ensure that the photosensitive sensor 10121E can receive
more light through the window. Person skilled in the art should
understand that a specific shape of the encapsulation portion 1011E
will not limit the scope of the present invention.
[0411] Referring to FIG. 22, the camera module 10100E according to
a sixth preferred embodiment of the present invention is
illustrated. The camera module can be an automatic focus module.
The camera module includes one the photosensitive unit 1010E and
one the camera lens 1030E.
[0412] More specifically, the camera lens 1030E is installed in the
lens installing groove 101131E of the camera lens installing
section 10113E of the encapsulation portion 1011E of the
photosensitive unit 1010E. The optical filter 1020E is molded on
the photosensitive unit 1011E. Therefore, no additional independent
optical filter is required and it is unnecessary to further
separately install the optical filter when assembling the camera
module. Hence, the assembling processes of the camera module can be
reduced and the back focal length of the camera module can be
decreased due to the molded optical filter arrangement of the
present invention.
[0413] It is also worth mentioning that the camera lens 1030E is
supported in the camera lens installing section 10113E of the
encapsulation portion 1011E of the photosensitive unit 1010E.
Therefore, the encapsulation portion 1011E would be functioned as
the mounting frame or lens barrel of the conventional camera module
to provide a supportive and holding site for the camera lens 1030E,
but the present invention is assembled by different technical
process from conventional COB technology. The independent mounting
frame of a camera module based on the conventional COB technique is
affixed on the circuit board by means of adhering, but the
encapsulation portion 1011E of the present invention is affixed on
the main circuit board 10122E by means of molding that does not
require the process of adhering and affixing. Contrasting to the
process of adhering and affixing, the process of molding provides
better connection stability and technological process
controllability. In addition, it does not have to reserve the
adhesive space between the encapsulation portion 1011E and the main
circuit board 10122E for AA adjustment. Therefore, it saves the
adhesive space of AA adjustment of conventional camera module, and
allows the thickness of the camera module to be further reduced.
Meanwhile, the encapsulation portion 1011E encapsulates and wraps
the circuit elements 10123E and the connecting elements 10124E,
that enables the function of the conventional mounting frame, the
circuit elements 10123E, and the connecting element 10124E can
spatially overlap without the need to reserve a safety distance
around the circuit components as in the conventional camera module.
As a result, the height of the encapsulation portion 1011E, which
functions as the independent mounting frame, can be arranged in a
smaller range, so as to further provide room for reducing the
thickness of the camera module. Besides, the encapsulation portion
1011E eliminates the conventional mounting frame but provides
installing site for the camera lens 1030E by itself, that avoids
any tilt deviation generally occurred in attaching and assembling
the conventional mounting frame and reduces the accumulated
tolerance during the assembling of the camera module. In addition,
the encapsulation and wrapping up of the connecting element(s)
10124E by the encapsulation portion 1011E and the inner extension
of the encapsulation portion 1011E towards the non-photosensitive
area 101212E of the photosensitive sensor 10121E enables the size
of the encapsulation portion 1011E can be shrunk inwardly, so as to
further decrease the lateral sizes in length and width of the
camera module.
[0414] Referring to FIGS. 23 and 24, a camera module 10100F and a
photosensitive unit 1010F according to a seventh preferred
embodiment of the present invention is illustrated. The
photosensitive unit 1010F is adapted for assembling and producing
camera module to achieve the molded camera module. The
photosensitive unit 1010F includes an encapsulation portion 1011F
and a photosensitive portion 1012F, wherein the encapsulation
portion 1011F is molded to connect with the photosensitive portion
1012F.
[0415] The photosensitive portion 1012F includes a main circuit
board 10122F and a photosensitive sensor 10121F, wherein the
photosensitive sensor 10121F is disposed on the main circuit board
10122F. According to the present embodiment of the present
invention, the photosensitive sensor 10121F is molded to connect to
the main circuit board 10122F.
[0416] According to the present embodiment of the present
invention, the photosensitive portion 1012F includes a connecting
circuit and at least a circuit element 10123F. The connecting
circuit is prearranged in the main circuit board 10122F and the
circuit element 10123F is electrically connected to the connecting
circuit and the photosensitive sensor 10121F to process the
photosensing function for the photosensitive sensor 10121F. The
circuit element 10123F is protrudingly deployed on the main circuit
board 10122F. The circuit element 10123F can be, for example but
not limited to, resistors, capacitors, diodes, triodes,
potentiometers, electric relays, actuators, or etc.
[0417] It is worth mentioning that the encapsulation portion 1011F
encapsulates and wraps up the circuit element 10123F therein, so
that the circuit element 10123F will not be directly exposed in any
space, and more specifically, not be exposed in the environment
that communicates with the photosensitive sensor 10121F. Therefore,
during the assembling of the camera module, the circuit element
10123F will not contaminate pollutions, such as dusts, or adversely
influence the photosensitive sensor 10121F. It is different from
the conventional camera module that the circuit element 10123F,
such as resistance-capacitance components, is exposed outside. The
enclosure and encapsulation of the photosensitive sensor 10121F by
molding, sundries and dusts are prevented from staying on the
surface of the circuit element 10123F that avoids the
photosensitive sensor 10121F from being contaminated and causes
dark spots and other defectives of the camera module.
[0418] The encapsulation portion 1011F forms a window 101100F to
provide a photosensitive path for the photosensitive sensor
10121F.
[0419] According to the present fifth preferred embodiment of the
present invention, the photosensitive portion 1012F includes at
least one connecting element 10124F for electrically connecting the
photosensitive sensor 10121F with the main circuit board 10122F.
Further, the connecting element 10124F can be embodied to be, for
example but not limited to, gold wire, copper wire, aluminum wire,
and/or silver wire. Especially, the connecting elements 10124F
curvingly connects the photosensitive sensor 10121F and the main
circuit board 10122F.
[0420] It is worth mentioning that the connecting element 10124F is
molded inside the encapsulation portion 1011F, so as to enclose,
encapsulate and/or wrap up the connecting element 10124F by the
encapsulation portion 1011F to keep them from direct exposure to
outside. Therefore, during the assembling of the camera module, the
connecting element(s) 10124F will not receive any collision and
damage, and, at the same time, it reduces the adverse effect of the
connecting element(s) 10124F due to the environmental factors, such
as temperature and humidity, so as to ensure a stable communication
and connection between the photosensitive sensor 10121F and the
main circuit board 10122F. This is completely different from the
conventional art.
[0421] It is worth mentioning that the encapsulation portion 1011F
encapsulates and wraps up the circuit element 10123F and the
connecting element 10124F, which advantages in protecting the
circuit element 10123F and the connecting element 10124F as well as
obtaining a higher performance camera module. However, those
skilled in the art should understand that the encapsulation portion
1011F shall not be limited in wrapping up the circuit element
10123F and/or the connecting element 10124F. In other words, in
other embodiments of the present invention, the encapsulation
portion 1011F can be directly molded on main circuit board 10122F
without protruded circuit element 10123F or be molded on various
positions, such as the outer sides, the periphery, and etc., of the
circuit element 10123F.
[0422] In addition, each of the photosensitive sensors 10121F has a
photosensitive area 101211F and a non-photosensitive area 101212F,
wherein the non-photosensitive area 101212F is positioned
surrounding the periphery of the photosensitive area 101211F. The
photosensitive area 101211F is adapted for processing
photosensitization. The connecting element 10124F is connected to
the non-photosensitive area 101212F.
[0423] According to the present preferred embodiment of the present
invention, the encapsulation portion 1011F is extended to mold on
the non-photosensitive area 101212F of the photosensitive sensor
10121F, so as to overlappedly mount the photosensitive sensor
10121F on the main circuit board 10122F by means of molding. In
this manner, such as by the method of Molding on Chip, the moldable
area is extended towards the inside of the encapsulation portion
1011F, such that the structural portion outside of the
encapsulation portion 1011F and the main circuit board 10122F can
be reduced, that further reduces the size in length and width of
the molded photosensitive portion 1012F and reduces the size in
length and width of the camera module assembled thereby.
[0424] In the present embodiment of the present invention, the
encapsulation portion 1011F is protrudingly positioned surrounding
the outer portion of the photosensitive area 101211F of the
photosensitive sensor 10121F. Particularly, the encapsulation
portion 1011F integrally seal its connection, so as to provide a
great sealingness and tightness. Therefore, when the photosensitive
unit 1010F is used to assemble the camera module, the
photosensitive sensor 10121F will be sealed inside the camera
module to forms a sealed inner space.
[0425] Particularly, in producing the photosensitive unit 1010F, a
conventional circuit board can be used to make the main circuit
board 10122F. The photosensitive sensor 10121F is deployed on the
main circuit board 10122F and electrically connected by the
connecting elements 10124F. Then, after the main circuit board
10122F and the photosensitive sensor 10121F are initially
assembled, they are processed by Surface Mount Technology (SMT) and
then molded by the insert molding technique, for example by means
of an injection molding machine, to form the encapsulation portion
1011F, or molded by the pressing molding technique, which is
commonly applied in semiconductor packaging, to form the
encapsulation portion 1011F. The main circuit board 10122F can
selectively be, for example but not limited to, rigid-flex board,
ceramic substrate (without flexible board), or rigid PCB (without
flexible board). The formation of the encapsulation portion 1011F
can be selected by, for example but not limited to, injection
molding technique and pressing molding technique. The material of
the encapsulation portion 1011F can be, for example but not limited
to, nylon, liquid crystal polymer (LCP), or polypropylene (PP) for
injection molding technique, or thermoplastic resin or
thermosetting resin for pressing molding technique. Person skilled
in the art should understand that the above available manufacture
methods and available materials are examples to describe available
implementations of the present invention, rather than limitations
of the present invention.
[0426] Furthermore, the encapsulation portion 1011F includes a
covering section 10111F and an optical filter installing section
10112F. The optical filter installing section 10112F is molded
integrally to connect with the covering section 10111F. The
covering section 10111F is molded to attach on the main circuit
board 10122F for encapsulating and wrapping up the circuit element
10123F and the connecting element 10124F. The optical filter
installing section 10112F is arranged for installing an optical
filter 1020F. In other words, when the photosensitive unit 1010F is
used to assemble the camera module, the optical filter 1020F of the
camera module will be mounted at the optical filter installing
section 10112F, which makes the optical filter 1020F be positioned
along the photosensitive path of the photosensitive sensor 10121F
without the need of any additional mounting frame of the optical
filter. In other words, the encapsulation portion 1011F of the
present embodiment has a function as a conventional optical filter
frame while the top portion of the optical filter installing
section 10112F has a good evenness and smoothness by means of the
molding technique, that enables the optical filter 1020F to be
installed evenly, that is superior to conventional camera
modules.
[0427] In addition, the optical filter installing section 10112F
has an installing groove 101121F. The installing groove 101121F is
communicated with the window 101100F to provide an adequate
installation space for the optical filter 1020F such that the
optical filter 1020F will not protrude from the top surface 101122F
of the optical filter installing section 10112F. In other words,
the top of the encapsulation portion 1011F with the installing
groove 101121F provided therein is adapted for the optical filter
1020F to be installed on the encapsulation portion 1011F without
protruding out from the top of the encapsulation portion 1011F.
[0428] It is worth mentioning that the inner wall of the
encapsulation portion 1011F can be shaped according to the need of
the object, such as connecting element 10124F, to be installed. For
example, the inner wall can be in an inclined and slope shape, so
that by the time the connecting element(s) 10124F is wrapped up by
the encapsulation portion 1011F, the photosensitive sensor 10121F
can receive as much light as possible. Person skilled in the art
should understand that a specific shape of the encapsulation
portion 1011F will not limit the scope of the present
invention.
[0429] The differences between this seventh preferred embodiment
with the other preferred embodiments of the present invention, one
or more reinforced holes 101221F are formed on top of the main
circuit board 10122F and the bottom of the encapsulation portion
1011F is molded to extend into the reinforced holes 101221F, so as
to enhance the structural strength of the main circuit board 10122F
and connection of the main circuit board 10122F and the
encapsulation portion 1011F. In other words, the combination of two
different materials forms a combined composite structure that
reinforces the structural strength of the main circuit board
10122F, as a base.
[0430] The positions of the reinforced holes 101221F can be
determined based on practical needs. Also, based on the need of the
structural strength of the circuit board, the reinforced holes
10224D can be, for example, arranged in a symmetrical construction.
By reinforcing the structural strength of the main circuit board
10122F with such reinforced holes 101221F which are filled with the
encapsulation portion, the thickness of the main circuit board
10122F and the thickness of the camera module assembled thereof can
thus be reduced. Besides, the heat dissipative ability of the
photosensitive unit 1010F is enhanced as well.
[0431] It is worth mentioning that, according to the present
seventh preferred embodiment of the present invention, the
reinforced holes 101221F are indented slots that avoid the molding
material of the encapsulation portion 1011F from leaking through
the reinforced holes 101221F when molding to make the
photosensitive unit 1010F.
[0432] Similar to the above preferred embodiments, the
photosensitive unit 1010F can be assembled for a fixed focus module
or zoom lens module. Those skilled in the art should understand
that the assembling and application ways of the photosensitive unit
1010F shall not considered be limitations of the present
invention.
[0433] Referring to FIG. 25, a photosensitive unit 1010G according
to an eighth preferred embodiment of the present invention is
illustrated. The photosensitive unit 1010G is adapted for
assembling and producing camera module to achieve the molded camera
module. The photosensitive unit 1010G includes an encapsulation
portion 1011G and a photosensitive portion 1012G, wherein the
encapsulation portion 1011G is molded to connect with the
photosensitive portion 1012G.
[0434] The photosensitive portion 1012G includes a main circuit
board 10122G and a photosensitive sensor 10121G, wherein the
photosensitive sensor 10121G is disposed on the main circuit board
10122G. According to the present embodiment of the present to
invention, the photosensitive sensor 10121G is molded to connect to
the main circuit board 10122.
[0435] According to the present embodiment of the present
invention, the photosensitive portion 1012G includes a connecting
circuit and at least a circuit element 10123G. The connecting
circuit is prearranged in the main circuit board 10122G and the
circuit element 10123G is electrically connected to the connecting
circuit and the photosensitive sensor 10121G to process the
photosensing function for the photosensitive sensor 10121G. The
circuit element 10123G is protrudingly deployed on the main circuit
board 10122G. The circuit element 10123G can be, for example but
not limited to, resistors, capacitors, diodes, triodes,
potentiometers, electric relays, actuators, and/or etc.
[0436] It is worth mentioning that the encapsulation portion 1011G
encapsulates and wraps up the circuit element 10123G therein, so
that the circuit element 10123G will not be directly exposed in any
space, and more specifically, not be exposed in the environment
that communicates with the photosensitive sensor 10121G. Therefore,
during the assembling of the camera module, the circuit element
10123G will not contaminate pollutions, such as dusts, or adversely
influence the photosensitive sensor 10121G. It is different from
the conventional camera module that the circuit element 10123G,
such as resistance-capacitance components, is exposed outside. The
enclosure and encapsulation of the photosensitive sensor 10121G by
molding, sundries and dusts are prevented from staying on the
surface of the circuit element 10123G that avoids the
photosensitive sensor 10121G from being contaminated and causes
dark spots and other defectives of the camera module.
[0437] The encapsulation portion 1011G forms a window 101100G to
provide a photosensitive path for the photosensitive sensor
10121G.
[0438] According to the present fifth preferred embodiment of the
present invention, the photosensitive portion 1012G includes at
least one connecting element 10124G for electrically connecting the
photosensitive sensor 10121G with the main circuit board 10122G.
Further, the connecting element 10124G can be embodied to be, for
example but not limited to, gold wire, copper wire, aluminum wire,
and/or silver wire. Especially, the connecting elements 10124G
curvingly connects the photosensitive sensor 10121G and the main
circuit board 10122G.
[0439] It is worth mentioning that the connecting element 10124G is
molded within the encapsulation portion 1011G, so that the
encapsulation portion 1011G, encloses, encapsulates and/or wraps up
the connecting element(s) 10124G and keep them from direct exposure
to the outside. Therefore, during the assembling of the camera
module, the connecting element(s) 10124G will not suffer any
collision or damage, and, at the same time, it reduces the impact
due to the environmental factors, such as temperature, on the
connecting element 10124G and stabilizes the communication and
connection between the photosensitive sensor 10121G and the main
circuit board 10122G. This is completely absent in the traditional
art.
[0440] It is worth mentioning that the encapsulation portion 1011G
encapsulates and wraps up the circuit element 10123G and the
connecting element 10124G, which advantages in protecting the
circuit element 10123G and the connecting element 10124G as well as
obtaining a higher performance camera module. However, those
skilled in the art should understand that the encapsulation portion
1011G shall not be limited in wrapping up the circuit element
10123G and/or the connecting element 10124G. In other words, in
other embodiments of the present invention, the encapsulation
portion 1011G can be directly molded on main circuit board 10122G
without protruded circuit element 10123G or be molded on various
positions, such as the outer sides, the periphery, and etc., of the
circuit element 10123G.
[0441] In addition, each of the photosensitive sensors 10121G has a
photosensitive area 101211G and a non-photosensitive area 101212G,
wherein the non-photosensitive area 101212G is positioned
surrounding the periphery of the photosensitive area 101211G. The
photosensitive area 101211G is adapted for processing
photosensitization. The connecting element 10124G is connected to
the non-photosensitive area 101212G.
[0442] According to the present preferred embodiment of the present
invention, the encapsulation portion 1011G is extended to mold on
the non-photosensitive area 101212G of the photosensitive sensor
10121G, so as to overlappedly mount the photosensitive sensor
10121G on the main circuit board 10122G by means of molding. In
this manner, such as by the method of Molding on Chip, the moldable
area of the encapsulation portion 1011G can be extended inwardly,
such that the outer structural portion of the encapsulation portion
1011G and the main circuit board 10122G can be reduced, which
further reduces the size in length and width of the molded
photosensitive portion 1012G and reduces the size in length and
width of the camera module assembled thereby.
[0443] In the present embodiment of the present invention, the
encapsulation portion 1011G is protrudingly positioned surrounding
the outer portion of the photosensitive area 101211G of the
photosensitive sensor 10121G. Particularly, the encapsulation
portion 1011G integrally seal its connection, so as to provide a
great sealingness and tightness. Therefore, when the photosensitive
unit 1010G is used to assemble the camera module, the
photosensitive sensor 10121G will be sealed inside the camera
module to forms a sealed inner space.
[0444] Particularly, in producing the photosensitive unit 1010G, a
conventional circuit board can be used to make the main circuit
board 10122G. The photosensitive sensor 10121G is deployed on the
main circuit board 10122G and electrically connected by the
connecting elements 10124G. Then, after the main circuit board
10122G and the photosensitive sensor 10121G are initially
assembled, they are processed by Surface Mount Technology (SMT) and
then molded by the insert molding technique, for example by means
of an injection molding machine, to form the encapsulation portion
1011G, or molded by the pressing molding technique, which is
commonly applied in semiconductor packaging, to form the
encapsulation portion 1011G. The main circuit board 10122G can
selectively be, for example but not limited to, rigid-flex board,
ceramic substrate (without flexible board), or rigid PCB (without
flexible board). The formation of the encapsulation portion 1011G
can be selected by, for example but not limited to, injection
molding technique and pressing molding technique. The material of
the encapsulation portion 1011G can be, for example but not limited
to, nylon, liquid crystal polymer (LCP), or polypropylene (PP) for
injection molding technique, or thermoplastic resin or
thermosetting resin for pressing molding technique. Person skilled
in the art should understand that the above available manufacture
methods and available materials are examples to describe available
implementations of the present invention, rather than limitations
of the present invention.
[0445] Furthermore, the encapsulation portion 1011G includes a
covering section 10111G and an optical filter installing section
10112G. The optical filter installing section 10112G is molded
integrally to connect with the covering section 10111G. The
covering section 10111G is molded to attach on the main circuit
board 10122G for encapsulating and wrapping up the circuit element
10123G and the connecting element 10124G. The optical filter
installing section 10112G is arranged for installing an optical
filter 1020G. In other words, when the photosensitive unit 1010G is
used to assemble the camera module, the optical filter 1020G of the
camera module will be mounted at the optical filter installing
section 10112G, which makes the optical filter 1020G be positioned
along the photosensitive path of the photosensitive sensor 10121G
without the need of any additional mounting frame of the optical
filter 1020G. In other words, the encapsulation portion 1011G of
the present embodiment has a function as a conventional optical
filter frame while the top portion of the optical filter installing
section 10112G has a good evenness and smoothness by means of the
molding technique, that enables the optical filter 1020G to be
installed evenly, that is superior to conventional camera
modules.
[0446] In addition, the optical filter installing section 10112G
has an installing groove 101121G. The installing groove is
communicated with the window 101100G to provide an adequate
installation space for the optical filter 1020G such that the
optical filter 1020G will not protrude from the top surface 101122G
of the optical filter installing section 10112G. In other words,
the top of the encapsulation portion 1011F with the installing
groove 101121F provided therein is adapted for the optical filter
1020F to be installed on the encapsulation portion 1011F without
protruding out from the top of the encapsulation portion 1011F.
[0447] It is worth mentioning that the inner wall of the
encapsulation portion 1011G can be shaped according to the shape of
the connecting element. For example, it can be an inclined and
slope shape, so that the photosensitive sensor 10121G can receive
more light while the connecting element 10124G is encapsulated and
wrapped by the encapsulation portion 1011G. Person skilled in the
art should understand that a specific shape of the encapsulation
portion 1011G will not limit the scope of the present
invention.
[0448] The differences between this seventh preferred embodiment
with the other preferred embodiments of the present invention
include one or more reinforced holes 101221G which are formed on
top of the main circuit board 10122G and the bottom of the
encapsulation portion 1011G which is molded to extend into the
reinforced holes 101221G, so as to enhance the structural strength
of the main circuit board 10122G and connection of the main circuit
board 122F and the encapsulation portion 11F. In other words, the
combination of two different materials forms a combined composite
structure that reinforces the structural strength of the main
circuit board 10122G, as a base.
[0449] The positions of the reinforced holes 101221G can be
determined based on practical needs. Also, based on the need of the
structural strength of the circuit board, the reinforced holes
10224D can be, for example, arranged in a symmetrical construction.
By reinforcing the structural strength of the main circuit board
10122G with such reinforced holes 101221G which are filled with the
encapsulation portion, the thickness of the main circuit board
10122G and the thickness of the camera module assembled thereof can
thus be reduced. Besides, the heat dissipative ability of the
photosensitive unit 1010G is enhanced as well.
[0450] It is worth mentioning that, according to the present
preferred embodiment of the present invention, the reinforced holes
101221G are through holes penetrating through the main circuit
board 10122G to communicate both sides of the main circuit board
10122G. Therefore, during the production of the photosensitive unit
1010G, the molding material of the encapsulation portion 1011G can
be fully bonded with the main circuit board 10122G to form a more
solid structure of combined composite material. Besides, the
through hole type reinforced hole of this eighth preferred
embodiment would be more easy to make than the indention type
reinforced hole in the above seventh preferred embodiment.
[0451] Similar to the above preferred embodiments, the
photosensitive unit 1010G can be assembled for a fixed focus module
or zoom lens module. Those skilled in the art should understand
that the assembling and application ways of the photosensitive unit
1010G shall not considered be limitations of the present
invention.
[0452] Referring to FIG. 26, the camera module 10100H according to
a ninth preferred embodiment of the present invention is
illustrated. The camera module can be a fixed focus module (FFM).
The camera module 10100H includes a photosensitive unit 1010H, a
frame 1050H, an optical filter 1020H, and a camera lens 1030H.
[0453] The frame 1050H is mounted on the photosensitive unit 1010H,
wherein the optical filter 1020H is mounted on the frame 1050H and
the camera lens 1030H is mounted on the frame 1050H.
[0454] The photosensitive unit 1010H includes an encapsulation
portion 1011H and a photosensitive portion 1012H, wherein the
encapsulation portion 1011H is molded to connect with the
photosensitive portion 1012H.
[0455] The photosensitive portion 1012H includes a main circuit
board 10122H and a photosensitive sensor 10121H, wherein the
photosensitive sensor 10121H is disposed on the main circuit board
10122H. According to the present embodiment of the present
invention, the photosensitive sensor 10121H is molded to connect to
the main circuit board 10122.
[0456] According to the present embodiment of the present
invention, the photosensitive portion 1012H includes a connecting
circuit and at least a circuit element 10123H. The connecting
circuit is prearranged in the main circuit board 10122H and the
circuit element 10123H is electrically connected to the connecting
circuit and the photosensitive sensor 10121H to process the
photosensing function for the photosensitive sensor 10121H. The
circuit element 10123H is protrudingly deployed on the main circuit
board 10122H. The circuit element 10123H can be, for example but
not limited to, resistors, capacitors, diodes, triodes,
potentiometers, electric relays, actuators, and/or etc.
[0457] It is worth mentioning that the encapsulation portion 1011H
encapsulates and wraps up the circuit element 10123H therein, so
that the circuit element 10123H will not be directly exposed in any
space, and more specifically, not be exposed in the environment
that communicates with the photosensitive sensor 10121H. Therefore,
during the assembling of the camera module, the circuit element
10123H will not contaminate pollutions, such as dusts, or adversely
influence the photosensitive sensor 10121H. It is different from
the conventional camera module that the circuit element 10123H,
such as resistance-capacitance components, is exposed outside. The
enclosure and encapsulation of the photosensitive sensor 10121H by
molding, sundries and dusts are prevented from staying on the
surface of the circuit element 10123H that avoids the
photosensitive sensor 10121H from being contaminated and causes
dark spots and other defectives of the camera module.
[0458] The encapsulation portion 1011H forms a window 101100H to
provide a photosensitive path for the photosensitive sensor
10121H.
[0459] According to the present fifth preferred embodiment of the
present invention, the photosensitive portion 1012H includes at
least one connecting element 10124H for electrically connecting the
photosensitive sensor 10121H with the main circuit board 10122H.
Further, the connecting element 10124H can be embodied to be, for
example but not limited to, gold wire, copper wire, aluminum wire,
and/or silver wire. Especially, the connecting elements 10124H
curvingly connects the photosensitive sensor 10121H and the main
circuit board 10122H.
[0460] It is worth mentioning that the connecting element 10124H is
molded within the encapsulation portion 1011H, so that the
encapsulation portion 1011H, encloses, encapsulates and/or wraps up
the connecting element(s) 10124H and keep them from direct exposure
to the outside. Therefore, during the assembling of the camera
module, the connecting element(s) 10124H will not suffer any
collision or damage, and, at the same time, it reduces the impact
due to the environmental factors, such as temperature, on the
connecting element 10124H and stabilizes the communication and
connection between the photosensitive sensor 10121H and the main
circuit board 10122H. This is completely absent in the traditional
art.
[0461] It is worth mentioning that the encapsulation portion 1011H
encapsulates and wraps up the circuit element 10123H and the
connecting element 10124H, which advantages in protecting the
circuit element 10123H and the connecting element 10124H as well as
obtaining a higher performance camera module. However, those
skilled in the art should understand that the encapsulation portion
1011H shall not be limited in wrapping up the circuit element
10123H and/or the connecting element 10124H. In other words, in
other embodiments of the present invention, the encapsulation
portion 1011H can be directly molded on main circuit board 10122H
without protruded circuit element 10123H or be molded on various
positions, such as the outer sides, the periphery, and etc., of the
circuit element 10123H.
[0462] In addition, each of the photosensitive sensors 10121H has a
photosensitive area 101211H and a non-photosensitive area 101212H,
wherein the non-photosensitive area 101212H is positioned
surrounding the periphery of the photosensitive area 101211H. The
photosensitive area 101211H is adapted for processing
photosensitization. The connecting element 10124H is connected to
the non-photosensitive area 101212H.
[0463] According to the present preferred embodiment of the present
invention, the encapsulation portion 1011H is extended to mold on
the non-photosensitive area 101212H of the photosensitive sensor
10121H, so as to overlappedly mount the photosensitive sensor
10121H on the main circuit board 10122H by means of molding. In
this manner, such as by the method of Molding on Chip (MOC), the
moldable area of the encapsulation portion 1011H can be extended
inwardly, such that the outer structural portion of the
encapsulation portion 1011H and the main circuit board 10122H can
be reduced that further reduces the size in length and width of the
molded photosensitive portion 1012H and reduces the size in length
and width of the camera module assembled thereby.
[0464] In the present embodiment of the present invention, the
encapsulation portion 1011H is protrudingly positioned surrounding
the outer portion of the photosensitive area 101211H of the
photosensitive sensor 10121H. Particularly, the encapsulation
portion 1011H integrally seal its connection, so as to provide a
great sealingness and tightness. Therefore, when the photosensitive
unit 1010H is used to assemble the camera module, the
photosensitive sensor 10121H will be sealed inside the camera
module to forms a sealed inner space.
[0465] Particularly, in producing the photosensitive unit 1010H, a
conventional circuit board can be used to make the main circuit
board 10122H. The photosensitive sensor 10121H is deployed on the
main circuit board 10122H and electrically connected by the
connecting elements 10124H. Then, after the main circuit board
10122H and the photosensitive sensor 10121H are initially
assembled, they are processed by Surface Mount Technology (SMT) and
then molded by the insert molding technique, for example by means
of an injection molding machine, to form the encapsulation portion
1011H, or molded by the pressing molding technique, which is
commonly applied in semiconductor packaging, to form the
encapsulation portion 1011H. The main circuit board 10122H can
selectively be, for example but not limited to, rigid-flex board,
ceramic substrate (without flexible board), or rigid PCB (without
flexible board). The formation of the encapsulation portion 1011H
can be selected by, for example but not limited to, injection
molding technique and pressing molding technique. The material of
the encapsulation portion 1011H can be, for example but not limited
to, nylon, liquid crystal polymer (LCP), or polypropylene (PP) for
injection molding technique, or thermoplastic resin or
thermosetting resin for pressing molding technique. Person skilled
in the art should understand that the above available manufacture
methods and available materials are examples to describe available
implementations of the present invention, rather than limitations
of the present invention.
[0466] The encapsulation portion 1011H provides an installation
site for the frame 1050H based on the advantage of the molding
technology. The encapsulation portion 1011H can be molded to
achieve good flatness and evenness, so as to allow the frame 1050H
to be evenly and levelly installed.
[0467] It is worth mentioning that the inner wall of the
encapsulation portion 1011H can be shaped according to the shape of
the connecting element. For example, it can be an inclined and
slope shape, so that the photosensitive sensor 10121H can receive
more light while the connecting element 10124H is encapsulated and
wrapped by the encapsulation portion 1011H. Person skilled in the
art should understand that a specific shape of the encapsulation
portion 1011H will not limit the scope of the present
invention.
[0468] In other embodiments of the present invention, the
photosensitive unit can also be assembled into an automatic focus
camera module, so as to change the focal length of the camera
module. Therefore, person skilled in the art should understand that
the type of the camera module shall not limit the scope of the
present invention.
[0469] Referring to FIG. 27, the photosensitive unit 1010 and
camera module 10100 according to a tenth preferred embodiment of
the present invention are illustrated. The different of this tenth
preferred embodiment with respect to the other preferred
embodiments, the photosensitive unit 1010 includes a shielding
layer 101261 that covers the main circuit board 10122 and the
encapsulation portion 1011, so as to not only reinforce the
structural strength of the main circuit board 10122, but also
enhance an electromagnetic immunity ability of the photosensitive
unit 1010.
[0470] Furthermore, the shielding layer 101261 is a metal layer
that can be made in form of plate structure or net structure.
[0471] Referring to FIG. 28, a photosensitive unit 1010 according
to an eleventh preferred embodiment of the present invention is
illustrated. The photosensitive unit 1010 comprises a frame 1050.
The frame 1050 is coupled on the encapsulation portion 1011, so as
to form a surroundingly closed window 101100 with the encapsulation
portion 1011.
[0472] Further, the encapsulation portion 1011 has a notch 101300.
The frame 1050 is fillingly arranged on the notch 101300, so as to
close the notch 101300 and make the window 101100. In other words,
the encapsulation portion 1011 is not a close ring shaped
structure, but it becomes a surroundingly closed structure after
the frame 1050 is coupled therewith.
[0473] The frame 1050 has an optical filter groove 1051, configured
for installing the optical filter 1020. The frame 1050 is added on
the encapsulation portion 1011, so as for providing an installation
site for the optical filter 1020.
[0474] The frame 1050 comprises an extended leg 1052 that fills in
the notch 101300 and extends to connect with the main circuit board
10122, so as to close the notch 101300 to create closure of the
window 101100.
[0475] In the implementation illustrated in the figure, the
encapsulation portion 1011 forms a platform structure that supports
the frame 1050 and the frame 1050 provides an installation site for
the optical filter 1020. According to another embodiment of the
present invention, the encapsulation portion can also have the
optical filter installing groove arranged thereon for installing
the frame 1050, wherein the extended leg 1052 is extended to be
connected with the main circuit board 10122. Further, the
structures of the notch 101300 of the encapsulation portion 1011
and the extended leg 1052 of the frame can be wedge-shaped, so as
for the frame 1050 to be smoothly and stably mounted on the
encapsulation portion 1011. Certainly, in other embodiments of the
present invention, the frame 1050 can also be formed into other
shapes. Therefore, person skilled in the art should understand that
the structure of the frame 1050 shall not limit the scope of the
present invention.
[0476] Further, the frame 1050 is extended downward to be connected
with the main circuit board 10122. The connection is through, for
example but not limited to, adhesive.
[0477] In other words, in this implementation, at least part of the
non-photosensitive area 101212 of the photosensitive sensor 10121
is integrally encapsulated by the encapsulation portion 1011, and
at least part of the non-photosensitive area 101212 is not
integrally encapsulated by the encapsulation portion 1011. The
non-photosensitive area 101212 that was not integrally encapsulated
by the encapsulation portion 1011 is corresponding to the extended
position of the frame 1050.
[0478] Referring to FIG. 29, a photosensitive unit 1010 according
to a twelfth preferred embodiment of the present invention is
illustrated. In this implementation, the circuit element 10123 is
deployed on the back side of the main circuit board 10122. For
instance, a plurality of the circuit elements 10123 are spacingly
attached on the back side of the main circuit board 10122. In other
words, the circuit element may not be deployed on the front side of
the main circuit board 10122, which is, not be deployed around the
photosensitive sensor 10121, such that it does not have to reserve
installation site for the circuit element 10123 around the
photosensitive sensor on the front side of the circuit board.
Therefore, it can reduce the size in length and width of the main
circuit board 10122, so as to reduce the size in length and width
of the camera module and allow the camera module to be utilized in
the electronic devices that are expected to be more compact.
[0479] The circuit element 10123 is deployed on the back side of
the main circuit board 10122. In other words, the circuit element
10123 can be deployed on the back side of the main circuit board
10122 at the position corresponding to the photosensitive sensor
10121, such that there can be a larger area available for deploying
the circuit element 10123. When the circuit element 10123 is
deployed on the front side of the main circuit board 10122, it can
only be arranged around the periphery of the photosensitive sensor
10121. As a result, it will require the main circuit board 10122 to
be larger. Moreover, when the encapsulation portion 1011 is being
formed, because the encapsulation portion 1011 has to encapsulate,
wrap up and/or enclose the circuit element 10123, it will also
require the encapsulation portion 1011 to be larger. All these
limit the potential of size deduction of the photosensitive unit
1010 and the camera module to a certain extent.
[0480] Referring to FIG. 30, in the photosensitive unit 1010
according to the alternative mode of the twelfth preferred
embodiment of the present invention, the circuit element 10123 is
deployed on the back side of the main circuit board 10122 and the
encapsulation portion 1011 covers and encloses, encapsulates and/or
wraps up the circuit element 10123.
[0481] Further, the encapsulation portion 1011 comprises a lower
covering portion 10115, provided on the back side of the main
circuit board 10122. The covering portion 10115 is integrally
formed on the back side of the main circuit board 10122, so as to
encapsulate, wrap up and/or enclose the circuit element 10123
located on the back side of the main circuit board 10122, such that
the circuit element can be stably arranged.
[0482] It is worth mentioning that, during the manufacturing
process, the lower covering portion 10115 can be integrally formed
with the covering section 10111 and the optical filter installing
section 10112 located on the upper portion of the main circuit
board 10122 or be formed solely. That is to say, it may also form
the lower covering portion 101115 on the back side of the main
circuit board 10122 after the main circuit board 10122 was formed.
Person skilled in the art should understand that the forming
process and size of the lower covering portion 10115 shall not
limit the present invention.
[0483] Referring to FIG. 31, a photosensitive unit 1010 according
to a thirteenth preferred embodiment of the present invention is
illustrated. The main circuit board 10122 comprises a first board
body 101223 and a second board body 101224. The first board body
101223 is electrically connected with the second board body 101224.
In addition, the first board body 101223 is electrically connected
with the second board body 101224 through a conductive medium
101225. The conductive medium 101225 can to be, for example but not
limited to, anisotropic conductive adhesive. Particularly, the
first board body 101223 can be a rigid board, while the second
board body 101224 can be a flexible board.
[0484] The photosensitive sensor 10121 is arranged on the first
board body 101223 and the encapsulation portion 1011 at least
partially integrally encapsulates the first board body 101223 and
at least part of the non-photosensitive area of the photosensitive
sensor 10121.
[0485] In addition, the photosensitive sensors 10121 are connected
to the first board body 101223 by electrically connecting with the
connecting elements 10124.
[0486] According to the figure of the present embodiment, the
second board body 101224 is lapped on the front side of the first
board body 101223 and be electrically connected with the first
board body 101223 through the conductive medium 101225.
[0487] In addition, the second board body 101224 can be spliced
with the first board body 101223 and be electrically connected with
the first board body 101223 through the conductive medium
101225.
[0488] In addition, the second board body 101224 can be connected
to the back side of the first board body 101223 and be electrically
connected with the first board body 101223 through the conductive
medium 101225.
[0489] When manufacturing the photosensitive unit 1010, according
to an implementation, it may first integrally form the
encapsulation portion on the first board body 101223 and then
electrically connect the first board body 101223 and the second
board body 101224. According to another implementation, it may
electrically connect the first board body 101223 and the second
board body 101224 first and then integrally form the encapsulation
portion 1011 on the first board body 101223. Certainly, the
encapsulation portion 1011 can be integrally formed on the
connection site of the first board body 101223 and the second board
body 101224, so as to stably affix the first board body 101223 and
the second board body 101224. Nonetheless, those skilled in the art
should understand that the connection mode of the first board body
101223 and the second board body 101224 and the forming position of
the encapsulation portion 1011 shall not limit the present
invention.
[0490] Referring to FIG. 32A, a photosensitive unit 1010 according
to a fourteenth preferred embodiment of the present invention is
illustrated. In the present embodiment of the present invention,
the photosensitive unit 1010 comprises a protective layer 10127
arranged on the main circuit board 10122, so as to make the surface
of the main circuit board 10122 flat and smooth and protect the
main circuit board 10122 during the manufacturing process.
[0491] Further, the main circuit board 10122 comprises a basal
plate 1227 and at least a circuit 1228, wherein the circuit 1228 is
deployed on the basal plate 1227. The protective layer 10127 covers
the circuit so as to protect the circuit. Besides, it also fill up
the uneven area formed on the surface of the basal plate 1227 of
the circuit 1228.
[0492] The protective layer 10127 can be expanded to the edge of
the basal plate, so as to cushion and support the forming mold when
manufacturing the photosensitive unit and to protect the main
circuit board 10122 by avoiding the ram force from damaging the
main circuit board when the forming mold is clamping.
[0493] In the manufacturing process, the protective layer may be
deployed after the photosensitive sensor 10121 has been attached on
the main circuit board 10122. Alternatively, it may deploy the
protective layer 10127 on the main circuit board first, and then
attach the main circuit board on the photosensitive sensor
10121.
[0494] For example, according to some embodiments, it may coat ink
on the main circuit board 10122, so as to form the protective layer
on the main circuit board 10122 by means of the medium like ink and
etc. The thickness of the protective layer 10122 and the deploying
area are both based on the needs.
[0495] According to some embodiments, the protective layer 10127
can be arranged around the periphery area of the photosensitive
sensor 10121. For example, the photosensitive sensor 10121 is
attached on the main circuit board 10122. Then the photosensitive
sensor 10121 is electrically connected with the main circuit board
10122 through the connecting element 10124. After that, medium like
ink and etc. is coated on the main circuit board around the area of
the photosensitive sensor, so as to form the protective layer.
[0496] Referring to FIG. 32B, in this implementation, the
protective layer 10127 can be deployed on at least part of the
non-photosensitive area of the photosensitive sensor, so as to
protect the photosensitive sensor 10121. In other words, when the
encapsulation portion 1011 is formed through the forming mold, the
forming mold may not directly contact the main circuit board 10122
and the photosensitive sensor 10121, but be supported by the
protective layer 10127, such that the main circuit board 10122 and
the photosensitive sensor 10121 can be protected.
[0497] To arrange the protective layer 10127 on the main circuit
board 10122 and/or the photosensitive sensor 10121 is advantageous
in several aspects, for example but not limited to the follows.
First, it can fill the uneven area of the main circuit board 10121,
so as to make the surface of the main circuit board 10121 even and
flat, which facilitates the integral forming process of the
encapsulation portion 1011. Second, it can cushion and support the
forming mold when the forming mold is utilized in forming the
encapsulation portion 1011, so as to reduce the impact of the ram
effect of the forming mold on the main circuit board 10121 and/or
the photosensitive sensor. Third, the protective layer is flexible,
such that when it is engaged with the edge of the forming mold, it
can prevent the forming material from overflowing during the
molding process and rendering burr. Fourth, after the
photosensitive unit 1010 is formed, because the resilience of the
protective layer 10127 is better than it of the encapsulation
portion 1011 and the main circuit board 10122, it can flexibly
cushion the interactive force between the encapsulation portion
1011 and the main circuit board 10122, such that the main circuit
board 10122 will not break away from the encapsulation portion 1011
easily due to environmental factors, like temperature and etc., and
other components like optical filter 1020 will not be affected as
well. Of course, there are other advantages of the arrangement of
the protective layer 10127, which, nevertheless, are not completely
specified here. It is worth mentioning that the resilience is a
relative characteristic comparing to the encapsulation portion 1011
and the main circuit board 10122 and it will not affect the image
quality of the camera module.
[0498] Referring to FIG. 33, each of the camera modules of the
above preferred embodiments can respectively form an array camera
module, wherein the array camera module comprises at least two of
the camera modules 10100. The camera modules 10100 coordinate with
each other to conduct the image capturing of the array camera
module, though the camera modules 10100 are both independent.
[0499] In the present alternative mode of the above preferred
embodiment of the present invention, the camera modules 10100 are
independent, but integrally assembled through an external frame
10400. Namely, components of the camera modules 10100 may not be
connected to one another, but be assembled freely. The camera
modules 10100 can be affixed on the external frame 10400 through
gluing.
[0500] The array camera module can be assembled with any of the
camera modules having one or more features of the photosensitive
units 1010 or camera modules 10100 according to the above
embodiments, rather than only be implemented in the manners
illustrated in the figure.
[0501] Referring to FIG. 34, according to an alternative mode of
the above preferred embodiments, each of the camera modules 10100
can respectively form another array camera module. The array camera
module comprises at least two of the camera modules 10100. The
camera modules 10100 coordinate with each other to conduct the
image capturing of the array camera module, and the camera modules
10100 are connected to each other.
[0502] In one embodiment, the main circuit boards 10122 of the
camera modules 10100 are interconnected, so as to form an integral
main circuit board, which can utilize a shared connector.
[0503] In one embodiment, the encapsulation portions 1011 of the
camera modules 10100 are integrally connected, so as to form a
conjoined encapsulation portion. In other words, a conjoined dual
encapsulation portion 1011 can be formed at once on the main
circuit boards 10122 and the photosensitive sensors 10121, so as to
interconnect the photosensitive unit s 1010 of the two camera
modules 10100.
[0504] In one embodiment, the frames 1050 of the camera modules are
integrally connected, so as to form a conjoined frame, such that
the photosensitive units 1010 can be connected through the
conjoined frame.
[0505] The above embodiment of the present invention utilizes a
dual-camera array camera module constructed by two camera modules
100 as an example for the description. Nevertheless, in other
embodiments of the present invention, it may also be constructed by
more of the camera modules 100, such as, three or more. Person
skilled in the art should understand that quantity of the camera
module 100 shall not be a limitation of the invention.
[0506] Referring to FIG. 35, the camera module 10100 can be
utilized on an electronic device body 200, so as to coordinate with
the electronic device body 200 to make an electronic device that
has image capturing functions. The electronic device 300 can
specifically embodied as, for example but not limited to, a
smartphone.
[0507] Although the electronic device body 200 is embodied to be a
smartphone in FIG. 1B, according to other embodiments of the
present invention, the electronic device body 200 may also be
embodied to be tablet, laptop, camera, PDA, eBook, MP3/4/5, and any
other electronic devices that the camera module 10100 may apply. Of
course, person skilled in the art should understand that it is also
possible to deploy the camera module 10100 on traditional
electrical appliances, such as refrigerator, washing machine,
television, and etc. and constructions, such as burglar-proof door,
wall, and etc. Hence, the applicable circumstances and usage modes
of the camera module 10100 shall not limit the content and scope of
the camera module 10100 of the present invention.
[0508] FIGS. 36A and 36B illustrate comparison views of the camera
module according to the present invention and a conventional camera
module. In FIG. 36A, the conventional camera module is illustrated
in the left view, while the camera module of the present invention
is illustrated in the right view. In FIG. 36B, the left view refers
the manufacturing of the conventional circuit board, and the right
view refers the manufacturing of the photosensitive unit of the
present invention.
[0509] In view of above, it is apparent that the photosensitive
unit and camera module of the present invention have the following
advantages:
[0510] 1. The size in length and width of the camera module can be
reduced, wherein the encapsulation portion and the circuit
elements, such as resistance-capacitances, can be spatially
overlapped. However, the mounting frame of the conventional camera
module must be installed at the outer side of the capacitors and
reserve a predetermined safety distance therebetween. The present
invention can utilize the space of the capacitors to fill molding
material around the capacitors directly.
[0511] 2. The module tilt can be prevented. The encapsulation
portion would substitute conventional plastic frame and decrease
accumulated tolerance/deviance.
[0512] 3. The molding formation enhances structural strength of the
circuit board that, under the same structural strength, the circuit
board can be made thinner to reduce the height of the camera module
because the encapsulation portion can also provide support and
increase structural strength.
[0513] 4. In view of the altitude space, a safety space for
assembling must be reserved between capacitors and the base in the
conventional camera module. However, the molding structure of the
camera module of the present invention does not require to reserve
any safety space for assembling that can reduce the height of the
camera module. A safety gap must also be reserved between the top
of the capacitors and the frame in the conventional camera module
in order to prevent interferences, but the present invention can
directly fill molding material around the capacitors.
[0514] 5. The resistance-capacitance components can be encapsulated
and wrapped by molding, so as to avoid dark spots and defectives of
the camera module caused by soldering flux, dust, and etc. in the
resistance-capacitance area, and to increase the product yield
rate.
[0515] 6. The present invention is suitable for highly efficient
mass production. Photosensitive unit of the present invention is
more suitable for mass imposition process. According to the molding
formation of the photosensitive unit of the present invention, the
photosensitive unit is more suitable for imposition process. In
other words, only at most 8 conventional frames can be produced in
one process, but more photosensitive units, as many as 80 to 90
pieces, can be molded to produce in each molding process.
[0516] Referring to FIGS. 37 to 43, a camera module 20100 and
photosensitive unit 2010 are illustrated according to a fifteenth
preferred embodiment of the present invention. The photosensitive
unit 2010 is for assembling and producing the camera module. The
photosensitive unit 2010 includes an encapsulation portion 2011 and
a photosensitive portion 2012, wherein the encapsulation portion
2011 is integrally encapsulated and connected to the photosensitive
portion 2012, such as forming an integral body through molding.
[0517] The photosensitive portion 2012 includes a main circuit
board 20122 and a photosensitive sensor 20121, wherein the
photosensitive sensor 20121 is disposed on the main circuit board
20122. According to the present embodiment of the present
invention, the photosensitive sensor 20121 is molded to connect to
the main circuit board 20122. Especially, the encapsulation portion
2011 is moldingly coupled to the photosensitive portion 2012 by
means of, for example, the method of Molding on Chip (MOC).
[0518] According to the present embodiment of the present
invention, the photosensitive portion 2012 includes a connecting
circuit and at least a circuit element 20123. The connecting
circuit is prearranged in the main circuit board 20122 and the
circuit element 20123 is electrically connected to the connecting
circuit and the photosensitive sensor 20121 to process the
photosensing function for the photosensitive sensor 20121. The
circuit element 20123 is protrudedly deployed on the main circuit
board 20122. The circuit element 20123 can be, for example but not
limited to, resistors, capacitors, diodes, triodes, potentiometers,
electric relays, and/or actuators.
[0519] It is worth mentioning that the encapsulation portion 2011
encapsulates and wraps up the circuit element 20123 therein, so
that the circuit element 20123 will not be directly exposed in any
space, and more specifically, not be exposed in the environment
that communicates with the photosensitive sensor 20121. Therefore,
during the assembling of the camera module, the circuit element
20123 will not be contaminated with contaminants, such as dusts,
and influence the photosensitive sensor 20121, that is different
from the arrangement of conventional camera module that the circuit
components, such as resistance-capacitance components, are exposed
to outside. So that by means of such molding encapsulation,
sundries and dusts are prevented from staying on the surface of the
circuit element 20123 to avoid the photosensitive sensor 20121 from
being contaminated thereby that would result in dark spots and
other defectives of the camera module.
[0520] It is worth mentioning that, in the present embodiment of
the present invention, the circuit element 20123 is recited as
protruded on the main circuit board 20122 as an example for the
description, whereas in other embodiments of the present invention,
the circuit element 20123 can also be embedded in the main circuit
board 20123 without protruding from the main circuit board. Person
skilled in the art should understand that the shape, type, and
mounting position of the circuit element 20123 should not limit the
present invention.
[0521] The encapsulation portion 2011 has a through hole window
201100 formed therein to provide a photosensitive path for the
photosensitive sensor 20121.
[0522] In other words, the encapsulation portion 2011 provides a
window, so as to serve as an light path for the photosensitive
sensor 20121, such that light passed through the camera lens 2030
(being introduced later) positioned on the top of the encapsulation
portion 2011 can reach the photosensitive sensor 20121 without
being obstructed by the encapsulation portion 2011.
[0523] According to the present preferred embodiment of the present
invention, the photosensitive portion 2012 includes at least one
connecting element 20124 for electrically connecting the
photosensitive sensor 20121 with the main circuit board 20122.
Further, 20 the connecting element 20124 can be embodied to be, for
example but not limited to, gold wire, copper wire, aluminum wire,
and/or silver wire. Especially, the connecting elements 20124
curvingly connects the photosensitive sensor 20121 and the main
circuit board 20122.
[0524] It is worth mentioning that the connecting element 20124 is
molded inside the encapsulation portion 2011, so as to enclose,
encapsulate and/or wrap up the connecting element 20124 by the
encapsulation portion 2011 to keep them from direct exposure to
outside. Therefore, during the assembling of the camera module, the
connecting element(s) 20124 will not receive any collision and
damage, and, at the same time, it reduces the adverse effect of the
connecting element(s) 20124 due to the environmental factors, such
as temperature and humidity, so as to ensure a stable communication
and connection between the photosensitive sensor 20121 and the main
circuit board 20122. This is completely different from the
conventional art.
[0525] From the bottom of each of the windows 201100 of the
encapsulation portion 2011, the size of the window 20100 is
gradually enlarged to the top thereof to form a slope shape.
Nevertheless, it is understandable that this slope or inclined
shape of the window 201100 shall not limit the present
invention.
[0526] The encapsulation portion 2011 has an inner side 201200. The
inner side 201200 surrounds to form the window 201100. The inner
side 201200 is arranged in a inclined and slope manner, such that
the window 201100 enlarges its size from a bottom thereof upwardly
and gradually, having a smaller bottom size and a larger top size,
to form an inclined shape slope side. Specifically, the inner side
201200 has a tilt angle .alpha., which is the included angle
between the tilt direction of the inner side 201200 and the
vertical direction.
[0527] It is worth mentioning that the encapsulation portion 2011
substantially covers and encloses, encapsulates and/or wraps up the
circuit element 20123 and the connecting element 20124 that
advantages in protecting the circuit element 20123 and the
connecting element 20124 as well as in achieving a higher
performance camera module. However, those skilled in the art should
understand that the encapsulation portion 2011 shall not be limited
in wrapping up the circuit element 20123 and/or the connecting
element 20124. In other words, in other embodiments of the present
invention, the encapsulation portion 2011 can be directly molded on
the main circuit board 20122 without circuit element 20123
protruded thereon or be molded on various positions, such as the
outer side portion and the periphery, of the circuit element
20123.
[0528] In addition, the photosensitive sensor 20121 has a
photosensitive area 201211 and a non-photosensitive area 201212,
wherein the non-photosensitive area 201212 is positioned around the
periphery of the photosensitive area 201211. The photosensitive
area 201211 is for conducting photosensitive function and process.
The connecting element 20124 is connected to the non-photosensitive
area 201212.
[0529] According to this preferred embodiment of the present
invention, the encapsulation portion 2011 is extended to the
non-photosensitive area 201212 of the photosensitive sensor 20121,
so as to overlappedly affix the photosensitive sensor 20121 on the
main circuit board 20122 by means of molding. In this manner, such
as the method of Molding on Chip (MOC), the molding area of the
encapsulation portion 2011 can be extended inwardly, so that the
outer structural portions of the encapsulation portion 2011 and the
main circuit board 20122 can be reduced, which further reduces the
size in length and width of the photosensitive unit 2010 as well as
the size in length and width of the camera module assembled
thereby.
[0530] In the present embodiment of the present invention, the
encapsulation portion 2011 is protrudingly positioned surrounding
the outer portion of the photosensitive area 201211 of the
photosensitive sensor 20121. Particularly, the encapsulation
portion 2011 integrally seal its connection, so as to provide a
great sealingness and tightness. Therefore, when the photosensitive
unit 2010 is used to assemble the camera module, the photosensitive
sensor 20121 will be sealed inside the camera module to forms a
sealed inner space.
[0531] Particularly, in producing the photosensitive unit 2010, a
conventional circuit board can be used to make the main circuit
board 20122. The photosensitive sensor 20121 is deployed on the
main circuit board 20122 and electrically connected by the
connecting elements 20124. Then, after the main circuit board 20122
and the photosensitive sensor 20121 are initially assembled, they
are processed by Surface Mount Technology (SMT) and then molded by
the insert molding technique, for example by means of an injection
molding machine, to form the encapsulation portion 2011, or molded
by the pressing molding technique, which is commonly applied in
semiconductor packaging, to form the encapsulation portion 2011.
The main circuit board 20122 can selectively be, for example but
not limited to, rigid-flex board, ceramic substrate (without
flexible board), or rigid PCB (without flexible board). The
formation of the encapsulation portion 2011 can be selected by, for
example but not limited to, injection molding technique and
pressing molding technique. The material of the encapsulation
portion 2011 can be, for example but not limited to, nylon, liquid
crystal polymer (LCP), or polypropylene (PP) for injection molding
technique, or epoxy resin for pressing molding technique. Person
skilled in the art should understand that the above available
manufacture methods and available materials are examples to
describe available implementations of the present invention, rather
than limitations of the present invention.
[0532] It is worth mentioning that according to the molding
formation method of the photosensitive unit 2010 of the present
invention, the molded photosensitive unit 2010 is suitable for
making in form of combined board that can produce photosensitive
units 2010 as many as 90 pieces, for example, at the same time,
while the one-time injected encapsulation portion, that is, the
lens holder, of conventional frame structure requires a prior
gluing process and usually allow only one piece to be attached at a
time, which can merely allow 4-8 piece in most cases or up to 32
pieces the most to be produced at one time.
[0533] Furthermore, the encapsulation portion 2011 includes a
covering section 20111 and an optical filter installing section
20112. The optical filter installing section 20112 is integrally
molded to connect with the covering section 20111. The covering
section 20111 is molded to mount on the main circuit board 20122 to
encapsulate, wrap up and/or enclose the circuit element(s) 20123
and the connecting element(s) 20124. The optical filter installing
section 20112 is configured for installing the optical filter 2020.
In other words, when the photosensitive unit 2010 is used for
assembling the camera module, the optical filter 2020 of the camera
module is mounted at the optical filter installing section 20112 to
ensure the optical filter 2020 be deployed along a photosensitive
path of the photosensitive sensor 20121 and does not require any
additional mounting frame for installing the optical filter. In
other words, the encapsulation portion 2011 itself also provides
the function as a conventional mounting frame and, in addition,
according to the advantage of molding technique, the top of the
optical filter installing section 20112 would have good evenness
and smoothness due to the molding technique, so as to allow the
optical filter 2020 to be installed in an even and flat manner that
is more superior to the conventional camera modules.
[0534] In addition, the optical filter installing section 20112 has
an installing groove 201121. The installing groove 201211 is
communicated with the window 201100 to provide an adequate
installation space for the optical filter 2020 such that the
optical filter 2020 will not protrude from the top surface 201122
of the optical filter installing section 20112. In other words, the
installing groove 201121 is provided on top of the encapsulation
portion 2011 for the optical filter 2020 to be installed therein.
Particularly, the optical filter 2020 can be an Infrared-Cut Filter
(IRCF).
[0535] It is worth mentioning that, in the present embodiment of
the present invention, the installing groove 201121 can be used for
the installation of the optical filter, whereas in other
embodiments of the present invention, the installing groove 201121
can be used for the installation of other component, such as the
camera lens, motor of the camera module, or etc. Person skilled in
the art should understand that the use of the installing groove
201121 shall not consider as a limitation of the present
invention.
[0536] It is worth mentioning that the inner wall of the
encapsulation portion 2011 is designed according to the shape of
the connecting element 20124 to be mounted thereon. For example, it
can be in sloped or inclined shape, so that while it encapsulates
and wraps up the connecting element(s) 20124, the photosensitive
sensor 20121 is capable of receiving as much light as possible.
Person skilled in the art should understand that a specific shape
of the encapsulation portion 2011 will not limit the scope of the
present invention.
[0537] Furthermore, according to the present preferred embodiment
of the present invention, the photosensitive unit 2010 includes a
motor connecting structure 2013 for connecting to the motor unit
2040 of the camera module. Each of the motor units 2040 has at
least one motor terminal 2041. Each of the motor connecting
structure 2013 includes at least one lead element such as lead wire
20131, wherein each of the lead elements 20131 is connected to the
motor unit 2040 and the main circuit board 20122. Each of the lead
elements 20131 is electrically connected to the main circuit board
20122. Further, each of the lead elements 20131 is electrically
connected to the connecting circuit of the main circuit board
20122. The lead element 20131 is deployed in the encapsulation
portion 2011 and extended to the top of the encapsulation portion
2011. Each of the lead elements 20131 has a motor coupling terminal
201311 exposed on top of the encapsulation portion 2011 for being
electrically connected to the motor terminal 2041 of the respective
motor unit 2040. It is worth mentioning that the lead element 20131
can be deployed by embedding during the molding formation of the
encapsulation portion 2011. In the conventional way of connection,
component like driving motor is connected to the circuit board
through independent lead wires, which involve relatively
complicated manufacture technique. However, the molding method of
the present invention that embeds the lead elements 20114 in the
molding process can not only substitute the conventional
technological process, such as motor soldering, but also make the
circuit connection being more stable. Particularly, in one
preferred embodiment of the present invention, the lead element
20131 is a conductor being embedded inside the encapsulation
portion 2011. For example, the motor terminal 41 can be connected
to the motor coupling terminal 201311 by attaching with conducting
adhesive or by welding and soldering.
[0538] It is worth mentioning that the embedding position of the
lead element 20131 and the revealing position of the motor coupling
terminal 201311 of the lead element 20131 on the encapsulation
portion 2011 can both be arranged based on the needs. For instance
in one preferred embodiment of the present invention the motor
coupling terminal 201311 of the lead element 20131 can be deployed
on the periphery of the encapsulation portion 2011, that is the top
surface of the encapsulation portion 2011 and the top surface
201122 of the optical filter installing section 20112. However, in
an alternative mode of the embodiment of the present invention, the
motor coupling terminal 201311 can be deployed on the inner side of
the encapsulation portion 2011, which is the bottom side of the
installing groove 201121 of the encapsulation portion 2011.
Therefore, there may be various installation sites provided for the
motor unit 40. In other words, when the motor unit 40 has to be
installed on top of the encapsulation portion 2011, the motor
coupling terminal 201311 will be provided on the top surface of the
outer side of the encapsulation portion 2011. When the motor unit
40 has to be installed in the installing groove 201121, the motor
coupling terminal 201311 can be provided on the inner side of the
encapsulation portion 2011, which is the bottom of the installing
groove 201121.
[0539] In other words, when producing the photosensitive unit 2010,
firstly the photosensitive sensor 20121 is attached in position,
and then the encapsulation portion 2011 is molded on the main
circuit board 20122 with the photosensitive sensor 20121 attached
thereon by means of such as the MOC technology. At the same time,
the lead element(s) 20131 can be embedded inside the encapsulation
portion 2011 during the molding while electrically connecting the
lead element(s) 20131 with the main circuit board 20122 and
revealing the motor coupling terminal(s) 201311 of the lead
element(s) 20131 on top of the encapsulation portion 2011 for
connecting with the motor terminal(s) 2041 of the motor unit 2040.
For example, when the photosensitive unit 2010 is to be installed
on the camera module, each motor terminal 2041 of the motor unit
2040 is connected to the motor coupling terminal 201311 of the
respective lead element 20131 by welding and soldering so as to
electrically connect the motor unit 2040 with the main circuit
board 20122. An independent lead wire is required to be deployed to
connect the motor unit 2040 and the main circuit board 20122 to
allow the length of the motor terminal 2042 of the motor unit 2040
to be shortened.
[0540] It is worth mentioning that the embedding position of the
lead element(s) 20131 can be configured based on the needs. For
example, in one preferred embodiment of the present invention, the
embedding position can be configured inside the encapsulation
portion 2011 to hide the lead element 20131(s). In an alternative
mode, the embedding position can be configured on the surface of
the encapsulation portion 2011. Person skilled in the art should
understand that position of the lead element 20131 shall not limit
the scope of the present invention.
[0541] FIG. 41A illustrates an equivalent alternative mode of the
motor connecting structure according to the above fifteenth
preferred embodiment of the present invention. The motor connecting
structure 2013 includes at least one terminal slot 20133. The
terminal slot 20133 is for accommodating the motor terminal 41 of
the motor unit 40 of the camera module. The terminal slot 20133 is
deployed on top of the encapsulation portion 2011. The motor
connecting structure 2013 includes at least one lead element such
as lead wire 20134, wherein the lead element 20134 is connected to
the motor unit 2040 and the main circuit board 20122. The lead
element 20134 is arranged in the encapsulation portion 2011 and
upwardly extended to the bottom wall of the terminal slot 20133 of
the encapsulation portion 2011. The lead element 20134 includes a
motor coupling terminal 1341 exposed on the bottom wall of the
terminal slot 20133 of the encapsulation portion 2011 for being
electrically connected to the motor terminal 2041 of the motor unit
2040. Particularly, in an implementation, the motor coupling
terminal 1341 can be embodied as a pad. The lead element 20134 can
be embodied as a conductor embedded inside the encapsulation
portion 2011.
[0542] In other words, when producing the photosensitive unit 2010,
in one embodiment, the photosensitive sensor 20121 is firstly
adhered to the main circuit board 20122, and then the encapsulation
portion 2011 is molded on the main circuit board 20122 and the
photosensitive sensor 20121 by means of the MOC technology, wherein
the terminal slot 20133 with predetermined length is provided in
the encapsulation portion 2011 to embed the lead element 20134
therein during the molding process, while the lead element 20134 is
electrically connected with the main circuit board 20122 and the
motor coupling terminal 1341 of the lead element 20134 is revealed
on the bottom wall of the terminal slot 20133 of the encapsulation
portion 2011 for connecting with the motor terminal 2041 of the
motor unit 2040. For example, when the photosensitive unit 2010 is
used to assemble the camera module, each motor terminal 2041 of the
motor unit 2040 is inserted into the terminal slot 20133 and
connected to the motor coupling terminal 1341 of the lead element
20134 by welding or soldering so as to electrically connect the
motor unit 2040 with the main circuit board 20122. An independent
lead element is required to connect the motor unit 2040 with the
main circuit board 20122 to ensure stable connection for the motor
terminal 2042 of the motor unit 2040 and to avoid unnecessary
contact from the motor terminal 2042. Particularly, the lead
element 20134 can be embodied as a conductor embedded inside the
encapsulation portion 2011.
[0543] It is worth mentioning that the embedding position of the
lead element(s) 20134 can be configured based on the needs. For
example, in one preferred embodiment of the present invention, the
embedding position can be configured inside the encapsulation
portion 2011 to hide the lead element 20134(s). In an alternative
mode, the embedding position can be configured on the surface of
the encapsulation portion 2011. Person skilled in the art should
understand that position of the lead element 20134 shall not limit
the scope of the present invention.
[0544] Referring to FIG. 41B, an alternative mode of the motor
connecting structure of the above fifteenth preferred embodiment of
the present invention is illustrated. The motor connecting
structure 2013 includes a terminal slot 20135. The terminal slot
20135 is for accommodating the motor terminal 2041 of the motor
unit 2040 of the camera module. The terminal slot 20135 is provided
inside the encapsulation portion 2011. Each of the motor connecting
structures 2013 includes at least one circuit junction 20132,
wherein the circuit junction 20132 is preset on the main circuit
board 20122 and electrically connected to the connecting circuit in
the main circuit board 20122. Furthermore, each the terminal slot
20135 is extended from the top of the encapsulation portion 2011 to
the main circuit board 20122 to present the circuit connection
junction 20132. In one preferred embodiment, the motor terminal
2041 is adapted to insert into the terminal slot 20135 and
connected to the circuit connection junction 20132 by soldering or
welding.
[0545] In other words, when producing the photosensitive unit 2010,
each the circuit connection junction 20132 is provided on the main
circuit board 20122 and the photosensitive sensor 20121 is attached
to the main circuit board 20122. Then, the encapsulation portion
2011 is molded on the main circuit board 20122 and the
photosensitive sensor 20121 by means of the MOC technology, while
the terminal slot 20135 with predetermined length is provided and
the circuit connection junction 20132 is revealed through the
terminal slot 20135 for connecting with the motor terminal 2041 of
the motor unit 2040. For example, when the photosensitive unit 2010
is to be assembled to form the camera module, each motor terminal
2041 of the motor unit 2040 is inserted into the terminal slot
20135 and connected to the circuit connection junction 20132 of the
main circuit board 20122 by welding and soldering so as to
electrically connect the motor unit 2040 with the main circuit
board 20122 to ensure stable connection for the motor terminal 2041
of the motor unit 2040 and to avoid unnecessary contact of the
motor terminal 2041.
[0546] Referring to FIG. 41C, another alternative mode of the motor
connecting structure of the above fifteenth preferred embodiment of
the present invention. The motor connecting structure 2013 includes
at least one carving line 20136. The carving line 20136 is adapted
to electrically connect the connecting elements, the photosensitive
sensor 20121, and the motor unit on the main circuit board 20122.
For example, but not limited to that the carving line 20136 can be
provided by Laser Direct Structuring (LDS) during the forming of
the encapsulation portion 2011. For example, in an embodiment of
the present invention, the carving line 20136 is formed by Laser
Direct Structuring on the surface the encapsulation portion 2011.
In the conventional way of connection, components like driving
motor are connected to the circuit board through independent lead
wires, which involve relatively complicated manufacture technique.
However, the method of the present invention that arranges the
carving line(s) 20136 in the molding process can not only
substitute the conventional technological processes, like plugging
or soldering of the motor terminal, but also make the circuit
connection being more stable. More specifically, the formation
process of the carving line 20136 can be formed by first providing
a carving slot in the encapsulation portion 2011 and then
electroplating or chemical plating in the carving slot to form the
electrical circuit.
[0547] Referring to FIGS. 37, 40, 42, and 43, a camera module
according to the above fifteenth preferred embodiment of the
present invention is illustrated. The camera module can be an
Automatic Focus Camera Module (AFM). The camera module 20100
includes one the photosensitive unit 2010, one the optical filter
2020, one motor unit 2030, and a camera lens 30.
[0548] The optical filter 2020 is mounted in the photosensitive
unit 2010, while the camera lens 2030 is mounted in the motor unit
2040. The motor unit 2040 is mounted on the photosensitive unit
2010.
[0549] Furthermore, the optical filter 2020 is mounted in the
installing groove 201121 of the optical filter installing section
20112 of the encapsulation portion 2011 of the photosensitive unit
2010. The motor unit 40 is mounted on top of the optical filter
installing section 20112 of the encapsulation portion 2011 of the
photosensitive unit 2010. In other words, the optical filter 2020
is mounted in the installing groove of the encapsulation portion
2011, while the camera lens 2030 is installed in the motor unit
2040. The motor unit 2040 is mounted on top of the encapsulation
portion 2011.
[0550] Especially, the motor terminals 2041 of the motor units 2040
are electrically connected with the circuit connection junctions
20132 of the photosensitive unit, respectively, so as to be
electrically connected to the main circuit board 20122 through the
lead element 20131. The motor terminal 2041 can be connected to the
motor coupling terminal 201311 of the lead element 20131 by
attaching with conducting adhesive or by welding and soldering.
[0551] Especially, when the motor terminal is affixed on the
circuit junction by attaching with conducting adhesive, it does not
require to solder any lead wire for connecting the motor unit 2040
with the main circuit board 20122 of the photosensitive portion
2012, and thus it reduces the motor soldering process.
[0552] It is worth mentioning that the electrical connection of the
motor unit 40 is described as electrical connecting the motor unit
40 by the lead element 20131 according to the present embodiment of
the present invention, but in other embodiments of the present
invention, it is possible to apply different motor connecting
structures 2013 to connect the motor unit 40. For example, the
various methods as shown in FIGS. 41A, 41B, and 41C. In other
words, the various motor connecting structures as illustrated in
FIGS. 41A, 41B, and 41C can be coupled with different
photosensitive units respectively to provide different ways to
electrically connect the motor unit. Therefore, person skilled in
the art should understand that what are shown in the appended
drawings shall not limit the scope of the present invention.
[0553] Those skilled in the art should understand that the
structures and forms of the camera module mentioned above are just
examples to describe ways of implementing the camera module, rather
than limitations of the present invention.
[0554] Referring to FIGS. 37-40, 44, and 45, alternative mode of
the camera module according to a fifteenth preferred embodiment of
the present invention is illustrated. The camera module can be a
fixed focus module (FFM). The camera module 20100 includes one the
photosensitive unit 2010, one the optical filter 2020, and a camera
lens 2030.
[0555] The optical filter 2020 and the camera lens 2030 are mounted
at the photosensitive unit 2010.
[0556] More specifically, the optical filter 2020 is mounted in the
installing groove 201121 of the optical filter installing section
20112 of the encapsulation portion 2011 of the photosensitive unit
2010. The camera lens 2030 is mounted at a top portion of the
optical filter installing section 20112 of the encapsulation
portion 2011 of the photosensitive unit 2010. In other words, the
optical filter 20 is mounted in the installing groove, while the
camera lens 2030 is mounted on top of the encapsulation portion
2011.
[0557] It is also worth mentioning that the camera lens 2030 is
supported on top of the optical filter installing section 20112 of
the encapsulation portion 2011 of the photosensitive unit 2010.
Therefore, the encapsulation portion 2011 functions as the frame of
a conventional camera module to provide a supportive and holding
site for the camera lens 2030, but it is assembled by a different
process from the process of the conventional COB technology. The
independent mounting frame of a camera module based on the
conventional COB technique is affixed on the circuit board by means
of adhering, but the encapsulation portion 2011 of the present
invention is affixed on the main circuit board 20122 by means of
molding that does not require the process of adhering and affixing.
Contrasting to the process of adhering and affixing, the process of
molding provides better connection stability and technological
process controllability. In addition, it does not have to reserve
the adhesive space between the encapsulation portion 2011 and the
main circuit board 20122 for AA adjustment. Therefore, it saves the
adhesive space of AA adjustment of conventional camera module, and
allows the thickness of the camera module to be further reduced.
Meanwhile, the encapsulation portion 2011 encapsulates and wraps
the circuit elements 20123 and the connecting elements 20124, which
enables the function of the conventional mounting frame, the
circuit elements 20123, and the connecting element 20124 can
spatially overlap without the need to reserve a safety distance
around the circuit components as in the conventional camera module.
As a result, the height of the encapsulation portion 2011, which
functions as the independent mounting frame, can be arranged in a
smaller range, so as to further provide room for reducing the
thickness of the camera module. Besides, the encapsulation portion
2011 substitutes the conventional frame that prevents any tilt
deviation occurred in adhering and assembling such conventional
frame that reduces the accumulated tolerance of the assembling of
the camera module. In addition, the encapsulation and wrapping up
of the connecting element(s) 20124 by the encapsulation portion
2011 and the inner extension of the encapsulation portion 2011
towards the non-photosensitive area 201212 of the photosensitive
sensor 20121 enables the size of the encapsulation portion 2011 can
be shrunk inwardly, so as to further decrease the lateral sizes in
length and width of the camera module.
[0558] Referring to FIGS. 46 and 47, a photosensitive unit and a
camera module thereof according to a sixteenth preferred embodiment
of the present invention are illustrated. The photosensitive unit
2010A is used for assembling and producing of camera module 20100A,
so as to obtain a molded camera module. The photosensitive unit
2010A includes an encapsulation portion 2011A and a photosensitive
portion 2012A, wherein the encapsulation portion 2011A is molded to
connect with the photosensitive portion 2012A.
[0559] The photosensitive portion 2012A includes a main circuit
board 20122A and a photosensitive sensor 20121A, wherein the
photosensitive sensor 20121A is disposed on the main circuit board
20122A. According to the present embodiment of the present
invention, the photosensitive sensor 20121A is molded to connect to
the main circuit board 20122A.
[0560] According to the present embodiment of the present
invention, the photosensitive portion 2012A includes a connecting
circuit and at least a circuit element 20123A. The connecting
circuit is prearranged in the main circuit board 20122A and the
circuit element 20123A is electrically connected to the connecting
circuit and the photosensitive sensor 20121A to process the
photosensing function for the photosensitive sensor 20121A. The
circuit element 20123A is protrudingly deployed on the main circuit
to board 20122A. The circuit element 20123A can be, for example but
not limited to, resistors, capacitors, diodes, triodes,
potentiometers, electric relays, actuators, or etc.
[0561] It is worth mentioning that the encapsulation portion 2011A
encapsulates and wraps up the circuit element 20123A therein, so
that the circuit element 20123A will not be directly exposed in any
space, and more specifically, not be exposed in the environment
that communicates with the photosensitive sensor 20121A. Therefore,
during the assembling of the camera module, the circuit element
20123A will not contaminate pollutions, such as dusts, or adversely
influence the photosensitive sensor 20121A. It is different from
the conventional camera module that the circuit element 20123A,
such as resistance-capacitance components, is exposed outside. The
enclosure and encapsulation of the photosensitive sensor 20121A by
molding, sundries and dusts are prevented from staying on the
surface of the circuit element 20123A that avoids the
photosensitive sensor 20121A from being contaminated and causes
dark spots and other defectives of the camera module.
[0562] The encapsulation portion 2011A forms a window 201100A to
provide a photosensitive path for the photosensitive sensor
20121A.
[0563] According to the present preferred embodiment of the present
invention, the photosensitive portion 2012A includes at least one
connecting element 20124A for electrically connecting the
photosensitive sensor 20121A with the main circuit board 20122A.
Further, the connecting element 20124A can be embodied to be, for
example but not limited to, gold wire, copper wire, aluminum wire,
and/or silver wire. Especially, the connecting elements 20124A
curvingly connects the photosensitive sensor 20121A and the main
circuit board 20122A. It is worth mentioning that the connecting
element 20124A is molded inside the encapsulation portion 2011A, so
that the connecting element(s) 20124A are enclosed, encapsulated
and/or wrapped up by the molded encapsulation portion 2011A that
keep them from direct exposure to the outside. Therefore, during
the assembling of the camera module, the connecting element(s)
20124A will not suffer any collision or damage, and, at the same
time, the influence by the environmental factors, such as
temperature, on the connecting element 20124A is reduced that
results in stabilization of the communication and connection
between the photosensitive sensor 20121A and the main circuit board
20122A. This is completely different from the prior art.
[0564] It is worth mentioning that the encapsulation portion 2011A
encapsulates and wraps up the circuit element 20123A and the
connecting element 20124A, which advantages in protecting the
circuit element 20123A and the connecting element 20124A as well as
obtaining a higher performance camera module. However, those
skilled in the art should understand that the encapsulation portion
2011A shall not be limited in wrapping up the circuit element
20123A and/or the connecting element 20124A. In other words, in
other embodiments of the present invention, the encapsulation
portion 2011A can be directly molded on main circuit board 20122A
without protruded circuit element 20123A or be molded on various
positions, such as the outer sides, the periphery, and etc., of the
circuit element 20123A.
[0565] This is an alternative mode of the above preferred
embodiment that, the main circuit board 20122A has an inner groove
201222A and the photosensitive sensor 20121A is installed in the
inner groove 201222A, so as to reduce the relative height of the
photosensitive sensor 20121A and the main circuit board 20122A.
Therefore, when the encapsulation portion 2011A covers and wraps up
the photosensitive sensor 20121A, the height of the encapsulation
portion 2011A can be reduced that results in reducing the height of
the camera module assembled with the photosensitive unit 2010A.
[0566] In addition, each of the photosensitive sensors 20121A has a
photosensitive area 201211A and a non-photosensitive area 201212A,
wherein the non-photosensitive area 201212A is positioned
surrounding the periphery of the photosensitive area 201211A. The
photosensitive area 201211A is adapted for processing
photosensitization. The connecting element 20124A is connected to
the non-photosensitive area 201212A.
[0567] According to the present preferred embodiment of the present
invention, the encapsulation portion 2011A is extended to mold on
the non-photosensitive area 201212A of the photosensitive sensor
20121A, so as to overlappedly mount the photosensitive sensor
20121A on the main circuit board 20122A by means of molding. Such
that, for example, by using the process of Molding on Chip (MOC) or
other molding technologies, the moldable area of the encapsulation
portion can be increased inwardly, so that the structural portion
2011A the outer portions of the encapsulation portion 2011A and the
main circuit board 20122A can be reduced, which further reduces the
size in length and width of the photosensitive unit 2012A and
reduces the size in length and width of the molded camera module
assembled thereby.
[0568] In the present embodiment of the present invention, the
encapsulation portion 2011A is protrudingly positioned surrounding
the outer portion of the photosensitive area 201211A of the
photosensitive sensor 20121A. Particularly, the encapsulation
portion 2011A integrally seal its connection, so as to provide a
great sealingness and tightness. Therefore, when the photosensitive
unit 2010A is used to assemble the camera module, the
photosensitive sensor 20121A will be sealed inside the camera
module to forms a sealed inner space.
[0569] Furthermore, the encapsulation portion 2011A includes a
covering section 20111A and an optical filter installing section
20112A. The optical filter installing section 20112A is molded
integrally to connect with the covering section 20111A. The
covering section 20111A is molded to attach on the main circuit
board 20122A for encapsulating and wrapping up the circuit element
20123A and the connecting element 20124A. The optical filter
installing section 20112A is arranged for installing an optical
filter 2020A. In other words, when the photosensitive unit 2010A is
used to assemble the camera module, the optical filter 2020A of the
camera module will be mounted at the optical filter installing
section 20112A, which makes the optical filter 2020A be positioned
along the photosensitive path of the photosensitive sensor 20121A
without the need of any additional mounting frame of the optical
filter 2020A. In other words, the encapsulation portion 2011A of
the present embodiment has a function as a conventional optical
filter frame while the top portion of the optical filter installing
section 20112A has a good evenness and smoothness by means of the
molding technique, that enables the optical filter 2020A to be
installed evenly, that is superior to conventional camera
modules.
[0570] In addition, the optical filter installing section 20112A
has an installing groove 201121A. The installing groove 201121A is
communicated with the window 201100A to provide an adequate
installation space for the optical filter 2020A such that the
optical filter 2020A will not protrude from the top surface 201122A
of the optical filter installing section 20112A. In other words,
the top of the encapsulation portion 2011A has the installing
groove 201121A provided therein for the optical filter 2020A to be
stably installed at the encapsulation portion 2011A without
protruding from the top of the encapsulation portion 2011A.
[0571] It is worth mentioning that the molded inner wall defines
the window and can be provided according to the shape of the
connecting element 20124A. For example, it can be in inclined or
slope shape, so that while the connecting element 20124A is
encapsulated and wrapped up by the encapsulation portion, the
photosensitive sensor 20121A may receive as much light as possible.
Person skilled in the art should understand that a specific shape
of the encapsulation portion 2011A will not limit the scope of the
present invention.
[0572] Referring to FIGS. 46-47, the camera module according to the
sixteenth preferred embodiment of the present invention is
illustrated. The camera module can be an automatic focus camera
module (AFM). Such camera module includes one the photosensitive
unit 2010A, one the optical filter 2020A, one motor unit 2030A, and
a camera lens 2030A.
[0573] The optical filter 2020A is mounted in the photosensitive
unit 2010A, while the camera lens 2030A is mounted in the motor
unit 2040A. The motor unit 2040A is mounted on the photosensitive
unit 2010A.
[0574] Furthermore, the optical filter 2020A is mounted in the
installing groove 201121A of the optical filter installing section
20112A of the encapsulation portion 2011A of the photosensitive
unit 2010A. The motor unit 40 is mounted on top of the optical
filter installing section 20112A of the encapsulation portion 2011A
of the photosensitive unit 2010A. In other words, the optical
filter 2020A is mounted in the installing groove 201121A of the
encapsulation portion 2011A, while the camera lens 30 is installed
in the motor unit 2030A. The motor unit 40 is mounted on top of the
encapsulation portion 2011A.
[0575] Especially, the motor unit 2040A is electrically connected
with the photosensitive unit 2010A through the motor connecting
structure 2013. The motor terminal 2041A of the motor unit 2040A is
electrically connected with the circuit connection junction 20132
of the photosensitive unit 2010, so as to be electrically connected
to the main circuit board 20122 through the lead element 20131. The
motor terminal 2041 can be connected to the motor coupling terminal
201311 of the lead element 20131 by attaching with conducting
adhesive or by welding and soldering.
[0576] Especially, when the motor terminal 2041A is affixed on the
circuit junction by attaching with conducting adhesive, it does not
require to solder any lead wire for connecting the motor unit 2040A
with the main circuit board 20122 of the photosensitive portion
2012, and thus it reduces the motor soldering process.
[0577] It is worth mentioning that the electrical connection of the
motor unit 2040A is described as electrical connecting the motor
unit 2040A by the lead element 20131 according to the present
embodiment of the present invention, but in other embodiments of
the present invention, it is possible to apply different motor
connecting structures 2013 to connect the motor unit 2040G. For
example, the various methods as shown in FIGS. 41A, 41B, and 41C.
In other words, the various motor connecting structures as
illustrated in FIGS. 41A, 41B, and 41C can be coupled with the
photosensitive unit 2010A of the present embodiment, so as to
provide different ways to electrically connect the motor unit.
Therefore, person skilled in the art should understand that what
are shown in the appended drawings shall not limit the scope of the
present invention.
[0578] In other embodiments of the present invention, the
photosensitive unit 2010A can also be assembled into a fixed focus
camera module. Therefore, person skilled in the art should
understand that the type of the camera module shall not limit the
scope of the present invention.
[0579] Referring to FIGS. 48 and 49, a photosensitive unit and a
camera module according to an seventeenth preferred embodiment of
the present invention is illustrated. The photosensitive unit 2010B
is used for assembling and producing of camera module, so as to
obtain a molded camera module. The photosensitive unit 2010B
includes an encapsulation portion 2011B and a photosensitive
portion 2012B, wherein the encapsulation portion 2011B is molded to
connect with the photosensitive portion 2012B.
[0580] The photosensitive portion 2012B includes a main circuit
board 20122B and a photosensitive sensor 20121B, wherein the
photosensitive sensor 20121B is disposed on the main circuit board
20122B. According to the present embodiment of the present
invention, the photosensitive sensor 20121B is molded to connect to
the main circuit board 20122B.
[0581] According to the present embodiment of the present
invention, the photosensitive portion 2012B includes a connecting
circuit and at least a circuit element 20123B. The connecting
circuit is prearranged in the main circuit board 20122B and the
circuit element 20123B is electrically connected to the connecting
circuit and the photosensitive sensor 20121B to process the
photosensing function for the photosensitive sensor 20121B. The
circuit element 20123B is protrudingly deployed on the main circuit
board 20122B. The circuit element 20123B can be, for example but
not limited to, resistors, capacitors, diodes, triodes,
potentiometers, electric relays, actuators, or etc.
[0582] It is worth mentioning that the encapsulation portion 2011B
encapsulates and wraps up the circuit element 20123B therein, so
that the circuit element 20123B will not be directly exposed in any
space, and more specifically, not be exposed in the environment
that communicates with the photosensitive sensor 20121B. Therefore,
during the assembling of the camera module, the circuit element
20123B will not contaminate pollutions, such as dusts, or adversely
influence the photosensitive sensor 20121B. It is different from
the conventional camera module that the circuit element 20123B,
such as resistance-capacitance components, is exposed outside. The
enclosure and encapsulation of the photosensitive sensor 20121B by
molding, sundries and dusts are prevented from staying on the
surface of the circuit element 20123B that avoids the
photosensitive sensor 20121B from being contaminated and causes
dark spots and other defectives of the camera module.
[0583] The encapsulation portion 2011B forms a window 201100B to
provide a photosensitive path for the photosensitive sensor
20121B.
[0584] According to the present preferred embodiment of the present
invention, the photosensitive portion 2012B includes at least one
connecting element 20124B for electrically connecting the
photosensitive sensor 20121B with the main circuit board 20122B.
Further, the connecting element 20124B can be embodied to be, for
example but not limited to, gold wire, copper wire, aluminum wire,
and/or silver wire. Especially, the connecting elements 20124B
curvingly connects the photosensitive sensor 20121B and the main
circuit board 20122B.
[0585] It is worth mentioning that the connecting element 20124B is
molded within the encapsulation portion 2011B, so that the
encapsulation portion 2011B, encloses, encapsulates and/or wraps up
the connecting element(s) 20124B and keep them from direct exposure
to the outside. Therefore, during the assembling of the camera
module, the connecting element(s) 20124B will not suffer any
collision or damage, and, at the same time, it reduces the impact
due to the environmental factors, such as temperature and humidity,
on the connecting element 20124B and stabilizes the communication
and connection between the photosensitive sensor 20121B and the
main circuit board 20122B. This is completely absent in the
traditional art.
[0586] It is worth mentioning that the encapsulation portion 2011B
encapsulates and wraps up the circuit element 20123B and the
connecting element 20124B, which advantages in protecting the
circuit element 20123B and the connecting element 20124B as well as
obtaining a higher performance camera module. However, those
skilled in the art should understand that the encapsulation portion
2011B shall not be limited in wrapping up the circuit element
20123B and/or the connecting element 20124B. In other words, in
other embodiments of the present invention, the encapsulation
portion 2011B can be directly molded on main circuit board 20122B
without protruded circuit element 20123B or be molded on various
positions, such as the outer sides, the periphery, and etc., of the
circuit element 20123B.
[0587] In addition, each of the photosensitive sensors 20121B has a
photosensitive area 201211B and a non-photosensitive area 201212B,
wherein the non-photosensitive area 201212B is positioned
surrounding the periphery of the photosensitive area 201211B. The
photosensitive area 201211B is adapted for processing
photosensitization. The connecting element 20124B is connected to
the non-photosensitive area 201212B.
[0588] According to the present preferred embodiment of the present
invention, the encapsulation portion 2011B is extended to mold on
the non-photosensitive area 201212B of the photosensitive sensor
20121B, so as to overlappedly mount the photosensitive sensor
20121B on the main circuit board 20122B by means of molding. In
this manner, such as the method of Molding on Chip (MOC), the
moldable area of the encapsulation portion 2011B can be extended
inwardly, such that the structural portion outside of the
encapsulation portion 2011B and the main circuit board 20122B can
be reduced, that further reduces the size in length and width the
molded photosensitive portion 2012B and reduces the size in length
and width of the camera module assembled thereby.
[0589] In the present embodiment of the present invention, the
encapsulation portion 2011B is protrudingly positioned surrounding
the outer portion of the photosensitive area 201211B of the
photosensitive sensor 20121B. Particularly, the encapsulation
portion 2011B integrally seal its connection, so as to provide a
great sealingness and tightness. Therefore, when the photosensitive
unit 2010B is used to assemble the camera module, the
photosensitive sensor 20121B will be sealed inside the camera
module to forms a sealed inner space.
[0590] Particularly, in producing the photosensitive unit 2010B, a
conventional circuit board can be used to make the main circuit
board 20122B. The photosensitive sensor 20121B is deployed on the
main circuit board 20122B and electrically connected by the
connecting elements 20124B. Then, after the main circuit board
20122B and the photosensitive sensor 20121B are initially
assembled, they are processed by Surface Mount Technology (SMT) and
then molded by the insert molding technique, for example by means
of an injection molding machine, to form the encapsulation portion
2011B, or molded by the pressing molding technique, which is
commonly applied in semiconductor packaging, to form the
encapsulation portion 2011B. The main circuit board 20122B can
selectively be, for example but not limited to, rigid-flex board,
ceramic substrate (without flexible board), or rigid PCB (without
flexible board). The formation of the encapsulation portion 2011B
can be selected by, for example but not limited to, injection
molding technique and pressing molding technique. The material of
the encapsulation portion 2011B can be, for example but not limited
to, nylon, liquid crystal polymer (LCP), or polypropylene (PP) for
injection molding technique, or epoxy resin for pressing molding
technique. Person skilled in the art should understand that the
above available manufacture methods and available materials are
examples to describe available implementations of the present
invention, rather than limitations of the present invention.
[0591] Furthermore, the top surface of the encapsulation portion
2011B is flat and smooth, and is adapted for mounting an optical
filter 2020B thereon. In other words, when the photosensitive unit
2010B is used in assembling the camera module, the optical filter
2020B of the camera module is mounted on the top surface of the
encapsulation portion 2011B, enabling the optical filter 2020B to
be arranged along the photosensitive path of the photosensitive
sensor 20121B without the need of any additional mounting frame for
the optical filter. In other words, the encapsulation portion 2011B
also functions as a conventional independent mounting frame. In
addition, due to the advantage of molding technique, the molded top
portion of the encapsulation portion 2011B can take advantage of
the mold to achieve good evenness and smoothness, so that the
optical filter 2020B can be evenly installed, that is superior to
conventional camera module.
[0592] The differences between the above preferred embodiments and
the present seventeenth embodiment of the present invention, the
photosensitive portion 2012B of the photosensitive unit 2010B
further includes a reinforced layer 20125B overlappedly attached to
the bottom of the main circuit board 20122B, so as to reinforce the
structural strength of the main circuit board 20122B. In other
words, the reinforced layer 20125B is adhered on a position of the
bottom layer of the main circuit board 20122B corresponding to the
positions of the encapsulation portion 2011B and the photosensitive
sensor 20121B, so that the main circuit board 20122B can also
stably and reliably support the encapsulation portion 2011B and the
photosensitive sensor 20121B.
[0593] Furthermore, the reinforced layer 20125B is a metal plate
attaching on the bottom layer of the main circuit board 20122B to
increase the structural strength of the main circuit board 20122B
as well as to enhance the heat dissipation of the photosensitive
unit 2010B by effectively dissipating heat generated by the
photosensitive sensor 20121B.
[0594] It is worth mentioning that the main circuit board 20122B
can be Flex Print Circuit (FPC). By enhancing the rigidity of the
FPC with the reinforced layer 20125B, the FPC having excellent
flexural property can still fulfill the loading and supporting
requirement for the photosensitive unit 2010B. In other words, more
options of different circuit boards can be used as the main circuit
board 20122B, such as PCB (Printed Circuit Board), FPC (Flexible
Printed Circuit), and RF (Rigid Flex). By using the reinforced
layer 20125B to enhance the structural strength and heat
dissipation of the main circuit board 20122B, the thickness of the
main circuit board 20122B can thus be reduced, that enables the
height of the photosensitive unit 2010B to be further reduced.
Hence, the height of the camera module assembled thereby can be
reduced too.
[0595] It is worth mentioning that, according to the present
embodiment of the present invention, the reinforced layer 20125 is
overlapped on the main circuit board 20122B in a plane manner. In
other embodiments of the present invention, the reinforced layer
20125B can be extended to cover the side walls of the encapsulation
portion 2011B, so as to not only reinforce the structural strength
of the photosensitive unit 2010B, but also enhance an
anti-electromagnetic ability thereof.
[0596] It is worth mentioning that the inner wall of the
encapsulation portion is designed according to the shape of the
connecting element 20124 to be mounted thereon. For example, it can
be in sloped or inclined shape, so that while it encapsulates and
wraps up the connecting element(s) 20124B, the photosensitive
sensor 20121B is capable of receiving as much light as possible.
Person skilled in the art should understand that a specific shape
of the encapsulation portion 2011B will not limit the scope of the
present invention.
[0597] Referring to FIGS. 48-49, the camera module according to the
seventeenth eighteenth preferred embodiment of the present
invention is illustrated. The camera module can be a fixed focus
module (FFM). The camera module includes one the photosensitive
unit 2010B, one the optical filter 2020B, and a camera lens
2030B.
[0598] The optical filter 2020B is installed at the photosensitive
unit 2010B, while the camera lens 2030B is mounted on the
photosensitive unit 2010B.
[0599] More specifically, the optical filter 2020B is mounted on
top of encapsulation portion 2011B of the photosensitive unit
2010B. The camera lens 2030B is mounted on top of encapsulation
portion 2011B of the photosensitive unit 2010B. Particularly, the
specific installation positions of the optical filter 2020B and the
camera lens 2030B in the encapsulation portion 2011B can be
coordinated and arranged based on practical needs.
[0600] It is also worth mentioning that the camera lens 2030B is
supported on top portion of the encapsulation portion 2011B of the
photosensitive unit 2010B. Therefore, the encapsulation portion
2011B can also function as the independent mounting frame of a
conventional camera module to provide a supportive and holding site
for the camera lens 2030B, but it is assembled by technical process
different from the conventional COB technology. The independent
mounting frame of a camera module based on the conventional COB
technique is affixed on the circuit board by means of adhering, but
the encapsulation portion 2011B of the present invention is affixed
on the main circuit board 20122B by means of molding that does not
require the process of adhering and affixing. Contrasting to the
process of adhering and affixing, the process of molding provides
better connection stability and technological process
controllability. In addition, it does not have to reserve the
adhesive space between the encapsulation portion 2011B and the main
circuit board 20122B for AA adjustment. Therefore, it saves the
adhesive space of AA adjustment of conventional camera module, and
allows the thickness of the camera module to be further reduced.
Meanwhile, the encapsulation portion 2011B encapsulates and wraps
the circuit elements 20123B and the connecting elements 20124B,
that enables the function of the conventional mounting frame, the
circuit elements 20123B, and the connecting element 20124B can
spatially overlap without the need to reserve a safety distance
around the circuit components as in the conventional camera module.
As a result, the height of the encapsulation portion 2011B, which
functions as the independent mounting frame, can be arranged in a
smaller range, so as to further provide room for reducing the
thickness of the camera module. Besides, the encapsulation portion
2011B that substitutes the conventional mounting frame avoids any
tilt deviation occurred in attaching and assembling the mounting
frame as in the conventional camera module and to reduce the
accumulated tolerance of in assembling the camera module. In
addition, the encapsulation and wrapping up of the connecting
element(s) 20124B by the encapsulation portion 2011B and the inner
extension of the encapsulation portion 2011B towards the
non-photosensitive area 201212B of the photosensitive sensor 20121B
enables the size of the encapsulation portion 2011B can be shrunk
inwardly, so as to further decrease the lateral sizes in length and
width of the camera module.
[0601] Referring to FIGS. 48 to 50, alternative modes of the camera
module according to the above seventeenth preferred embodiment of
the present invention is illustrated. The camera module can be an
automatic focus camera module. The camera module includes one the
photosensitive unit 2010B, one the optical filter 2020B, a motor
unit 2040B, and a camera lens 2030B.
[0602] The optical filter 2020B is mounted in the photosensitive
unit 2010B, while the camera lens 2030B is mounted in the motor
unit 2040B. The motor unit 2040B is mounted on the photosensitive
unit.
[0603] Furthermore, the optical filter 2020B is mounted on the top
portion of encapsulation portion 2011B of the photosensitive unit
2010B. The motor unit 2040B is mounted on the top portion of the
encapsulation portion 2011B of the photosensitive unit 2010B.
Particularly, the specific installation positions of the optical
filter 2020B and the motor unit 2040B at the encapsulation portion
2011B can be coordinated and arranged based on practical needs.
[0604] Those skilled in the art should understand that the
structures and forms of the camera module mentioned above are just
examples to describe ways of implementing the camera module, rather
than limitations of the present invention.
[0605] Especially, the motor unit 2040B is electrically connected
with the photosensitive unit 2010B through the motor connecting
structure 2013. The motor terminal 2041B of the motor unit 2040B is
electrically connected with the circuit connection junction 20132
of the photosensitive unit 2010, so as to be electrically connected
to the main circuit board 20122 through the lead element 20131. The
motor terminal 2041B can be connected to the motor coupling
terminal 201311 of the lead element 20131 by attaching with
conducting adhesive or by welding and soldering.
[0606] Especially, when the motor terminal 2041B is affixed on the
circuit junction by attaching with conducting adhesive, it does not
require soldering any lead wire for connecting the motor unit 2040B
with the main circuit board 20122 of the photosensitive portion
2012, and thus it reduces the motor soldering process.
[0607] It is worth mentioning that the electrical connection of the
motor unit 2040B is described as electrical connecting the motor
unit 2040B by the lead element 20131 according to the present
embodiment of the present invention, but in other embodiments of
the present invention, it is possible to apply different motor
connecting structures 2013 to connect the motor unit 2040G. For
example, the various methods as shown in FIGS. 41A, 41B, and 41C.
In other words, the various motor connecting structures as
illustrated in FIGS. 41A, 41B, and 41C can be coupled with the
photosensitive unit 2010B of the present embodiment, so as to
provide different ways to electrically connect the motor unit.
Therefore, person skilled in the art should understand that what
are shown in the appended drawings shall not limit the scope of the
present invention.
[0608] Referring to FIGS. 51 and 52, the photosensitive unit and
camera module according to an eighteenth preferred embodiment of
the present invention are illustrated. The photosensitive unit
2010C is used for assembling and producing of camera module, so as
to obtain a molded camera module. The photosensitive unit 2010C
includes an encapsulation portion 2011C and a photosensitive
portion 2012C, wherein the encapsulation portion 2011C is molded to
connect with the photosensitive portion 2012C.
[0609] The photosensitive portion 2012C includes a main circuit
board 20122C and a photosensitive sensor 20121C, wherein the
photosensitive sensor 20121C is disposed on the main circuit board
20122C. According to the present embodiment of the present
invention, the photosensitive sensor 20121C is molded to connect to
the main circuit board.
[0610] According to the present embodiment of the present
invention, the photosensitive portion 2012C includes a connecting
circuit and at least a circuit element 20123C. The connecting
circuit is prearranged in the main circuit board 20122C and the
circuit element 20123C is electrically connected to the connecting
circuit and the photosensitive sensor 20121C to process the
photosensing function for the photosensitive sensor 20121C. The
circuit element 20123C is protrudingly deployed on the main circuit
board 20122C. The circuit element 20123C can be, for example but
not limited to, resistors, capacitors, diodes, triodes,
potentiometers, electric relays, actuators, or etc.
[0611] It is worth mentioning that the encapsulation portion 2011C
encapsulates and wraps up the circuit element 20123C therein, so
that the circuit element 20123C will not be directly exposed in any
space, and more specifically, not be exposed in the environment
that communicates with the photosensitive sensor 20121C. Therefore,
during the assembling of the camera module, the circuit element
20123C will not contaminate pollutions, such as dusts, or adversely
influence the photosensitive sensor 20121C. It is different from
the conventional camera module that the circuit element 20123C,
such as resistance-capacitance components, is exposed outside. The
enclosure and encapsulation of the photosensitive sensor 20121C by
molding, sundries and dusts are prevented from staying on the
surface of the circuit element 20123C that avoids the
photosensitive sensor 20121C from being contaminated and causes
dark spots and other defectives of the camera module.
[0612] The encapsulation portion 2011C forms a window 201100C to
provide a photosensitive path for the photosensitive sensor
20121C.
[0613] According to the present preferred embodiment of the present
invention, the photosensitive portion 2012C includes at least one
connecting element 20124C for electrically connecting the
photosensitive sensor 20121C with the main circuit board 20122C.
Further, the connecting element 20124C can be embodied to be, for
example but not limited to, gold wire, copper wire, aluminum wire,
and/or silver wire. Especially, the connecting elements 20124C
curvingly connects the photosensitive sensor 20121C and the main
circuit board 20122C.
[0614] It is worth mentioning that the connecting element 20124C is
molded within the encapsulation portion 2011C, so that the
encapsulation portion 2011C, encloses, encapsulates and/or wraps up
the connecting element(s) 20124C and keep them from direct exposure
to the outside. Therefore, during the assembling of the camera
module, the connecting element(s) 20124C will not suffer any
collision or damage, and, at the same time, it reduces the impact
due to the environmental factors, such as temperature and humidity,
on the connecting element 20124C and stabilizes the communication
and connection between the photosensitive sensor 20121C and the
main circuit board 20122C. This is completely absent in the
traditional art.
[0615] It is worth mentioning that the encapsulation portion 2011C
encapsulates and wraps up the circuit element 20123C and the
connecting element 20124C, which advantages in protecting the
circuit element 20123C and the connecting element 20124C as well as
obtaining a higher performance camera module. However, those
skilled in the art should understand that the encapsulation portion
2011C shall not be limited in wrapping up the circuit element
20123C and/or the connecting element 20124C. In other words, in
other embodiments of the present invention, the encapsulation
portion 2011C can be directly molded on main circuit board 20122C
without protruded circuit element 20123C or be molded on various
positions, such as the outer sides, the periphery, and etc., of the
circuit element 20123C.
[0616] In addition, each of the photosensitive sensors 20121C has a
photosensitive area 201211C and a non-photosensitive area 201212C,
wherein the non-photosensitive area 201212C is positioned
surrounding the periphery of the photosensitive area 201211C. The
photosensitive area 201211C is adapted for processing
photosensitization. The connecting element 20124C is connected to
the non-photosensitive area 201212C.
[0617] According to the present preferred embodiment of the present
invention, the encapsulation portion 2011C is extended to mold on
the non-photosensitive area 201212C of the photosensitive sensor
20121C, so as to overlappedly mount the photosensitive sensor
20121C on the main circuit board 20122C by means of molding. In
this manner, such as using the method of Molding on the Chip, the
moldable area of the encapsulation portion 2011C can be extended
inwardly, such that the structural portion of the outer portion of
the encapsulation portion 2011C and the main circuit board 20122C
can be reduced, that further reduces the size in length and width
of the photosensitive unit and reduces the size in length and width
of the camera module assembled thereby.
[0618] In the present embodiment of the present invention, the
encapsulation portion 2011C is protrudingly positioned surrounding
the outer portion of the photosensitive area 201211C of the
photosensitive sensor 20121C. Particularly, the encapsulation
portion 2011C integrally seal its connection, so as to provide a
great sealingness and tightness. Therefore, when the photosensitive
unit 2010C is used to assemble the camera module, the
photosensitive sensor 20121C will be sealed inside the camera
module to forms a sealed inner space.
[0619] Particularly, in producing the photosensitive unit 2010C, a
conventional circuit board can be used to make the main circuit
board 20122C. The photosensitive sensor 20121C is deployed on the
main circuit board 20122C and electrically connected by the
connecting elements 20124C. Then, after the main circuit board
20122C and the photosensitive sensor 20121C are initially
assembled, they are processed by Surface Mount Technology (SMT) and
then molded by the insert molding technique, for example by means
of an injection molding machine, to form the encapsulation portion
2011C, or molded by the pressing molding technique, which is
commonly applied in semiconductor packaging, to form the
encapsulation portion 2011C. The main circuit board 20122C can
selectively be, for example but not limited to, rigid-flex board,
ceramic substrate (without flexible board), rigid PCB (without
flexible board), or flexible printed circuit (FPC). The formation
of the encapsulation portion 2011C can be selected by, for example
but not limited to, injection molding technique and pressing
molding technique. The material of the encapsulation portion 2011C
can be, for example but not limited to, nylon, liquid crystal
polymer (LCP), or polypropylene (PP) for injection molding
technique, or epoxy resin for pressing molding technique. Person
skilled in the art should understand that the above available
manufacture methods and available materials are examples to
describe available implementations of the present invention, rather
than limitations of the present invention.
[0620] The photosensitive unit 2010C further includes an optical
filter 2020C, wherein the optical filter 2020C is molded to be
overlappedly disposed on the photosensitive sensor 20121C. The
edges of the optical filter 2020C are molded by the encapsulation
portion 2011C so as to affix the optical filter 2020C in position.
It is worth mentioning that the optical filter 2020C covers on the
photosensitive sensor 20121C and insulates the photosensitive
sensor 20121C from the external environment to protect the
photosensitive sensor 20121C from damage and prevent dusts from
entering therein.
[0621] To produce the photosensitive unit 2010C, the photosensitive
sensor 20121C is firstly adhered on the main circuit board 20122C
and the connecting element 124C is connected with the
photosensitive sensor 20121C and the main circuit board 20122C.
[0622] Then, the optical filter 2020C is adhered on the
photosensitive sensor 20121C. Thereafter, the main circuit board,
the photosensitive sensor 20121C, and the optical filter 2020C are
molded to form the encapsulation portion 2011C. During the molding
process, since the optical filter 2020C covers on top of the
photosensitive sensor 20121C, any damage caused by the molding mold
to the photosensitive sensor 20121C can be prevented. In addition,
because the distance between the optical filter 2020C and the
photosensitive sensor 20121C is shortened, the back focal length of
the camera module assembled thereby can also be shortened, so that
the height of the camera module is reduced too. On the other hand,
since there is no need to provide an additional supporting
component for the optical filter 2020C, the thickness of the camera
module can be further reduced.
[0623] It is worth mentioning that the inner wall of the
encapsulation portion 2010C is designed according to the shape of
the connecting element 20124 to be mounted thereon. For example, it
can be in sloped or inclined shape, so that while it encapsulates
and wraps up the connecting element(s) 20124C, the photosensitive
sensor 20121C is capable of receiving as much light as possible.
Person skilled in the art should understand that a specific shape
of the encapsulation portion 2011C will not limit the scope of the
present invention.
[0624] Referring to FIGS. 51-53, the camera module according to the
eighteenth nineteenth preferred embodiment of the present invention
is illustrated. The camera module can be an automatic focus module.
The camera module 20100C includes one the photosensitive unit 2010C
and a camera lens 2030C. The camera lens 2030C is mounted on the
photosensitive unit 2010C for assembling to form the camera
module.
[0625] Especially, the camera lens 2030C can be affixed on top of
the encapsulation portion 2011C of the photosensitive unit 2010C by
means of adhering. In addition, taking advantage of the features of
the molding production in the molding technique, the top portion of
the encapsulation portion 2011C can have a better evenness and
smoothness that provides an excellent installation condition for
the camera lens 2030C, so as to achieve a high quality camera
module.
[0626] It is worth mentioning that the camera lens 2030C is
supported on top of the encapsulation portion 2011C of the
photosensitive unit 2010C. Therefore, the encapsulation portion
2011C itself functions as the independent mounting frame of a
conventional camera module to provide supportive and holding site
for the camera lens 2030C, but it is assembled by different
technical process from the conventional COB technology. The
independent mounting frame of a camera module based on the
conventional COB technique is affixed on the circuit board by means
of adhering, but the encapsulation portion 2011C of the present
invention is affixed on the main circuit board 20122C by means of
molding that does not require the process of adhering and affixing.
Contrasting to the process of adhering and affixing, the process of
molding provides better connection stability and technological
process controllability. In addition, it does not have to reserve
the adhesive space between the encapsulation portion 2011C and the
main circuit board 20122C for AA adjustment. Therefore, it saves
the adhesive space of AA adjustment of conventional camera module,
and allows the thickness of the camera module to be further
reduced. Meanwhile, the encapsulation portion 2011C encapsulates
and wraps the circuit elements 20123C and the connecting elements
20124C, that enables the function of the conventional mounting
frame, the circuit elements 20123C, and the connecting element
20124C can spatially overlap without the need to reserve a safety
distance around the circuit components as in the conventional
camera module. As a result, the height of the encapsulation portion
2011C, which functions as the independent mounting frame, can be
arranged in a smaller range, so as to further provide room for
reducing the thickness of the camera module. Besides, the
encapsulation portion 2011C that substitutes the conventional
mounting frame avoids any tilt deviation occurred in attaching and
assembling the mounting frame as in the conventional camera module
and to reduce the accumulated tolerance of in assembling the camera
module. In addition, the encapsulation and wrapping up of the
connecting element(s) 20124C by the encapsulation portion 2011C and
the inner extension of the encapsulation portion 2011C towards the
non-photosensitive area 201212C of the photosensitive sensor 20121C
enables the size of the encapsulation portion 2011C can be shrunk
inwardly, so as to further decrease the lateral sizes in length and
width of the camera module. Also, the photosensitive unit 2010C
molds the optical filter 2020C therein, so when assembling the
camera module, it is not necessary to conduct one more optical
filter attachment process. As a result, the assembling
technological process of the camera module can be minimized while
the efficiency can be enhanced. These are both superior to the
traditional art.
[0627] Referring to FIGS. 51, 53 and 54, alternative modes of the
camera module according to the above eighteenth preferred
embodiment of the present invention are illustrated. The camera
module 20100C can be an automatic focus camera module (AFM). The
camera module includes one the photosensitive unit 2010C, one the
motor unit 2040C, and a camera lens 2030C.
[0628] The camera lens 2030C is installed on the motor unit 2040C.
The motor unit 2040C is installed on the photosensitive unit 2010C,
so as to allow focal length adjustment of the camera module through
the motor unit 2040C. The motor unit 2040C is mounted on the top
portion of the encapsulation portion 2011C of the photosensitive
unit 2010C.
[0629] Particularly, the motor unit 2040C is electrically connected
to the photosensitive unit through the motor connecting structure
2013.
[0630] The motor terminals 2041C of the motor units 2040C are
electrically connected with the circuit connection junctions 20132
of the photosensitive unit 2010C respectively, so as to be
electrically connected to the main circuit board 20122 through the
lead element 20131. The motor terminal 2041C can be connected to
the motor coupling terminal 201311 of the lead element 20131 by
attaching with conducting adhesive or by welding and soldering.
[0631] Especially, when the motor terminal 2041C is affixed on the
circuit junction by attaching with conducting adhesive, it does not
require soldering any lead wire for connecting the motor unit 2040C
with the main circuit board 20122 of the photosensitive portion
2012, and thus it reduces the motor soldering process.
[0632] It is worth mentioning that the electrical connection of the
motor unit 2040C is described as electrical connecting the motor
unit 2040C by the lead element 20131 according to the present
embodiment of the present invention, but in other embodiments of
the present invention, it is possible to apply different motor
connecting structures 2013 to connect the motor unit 2040C. For
example, the various methods as shown in FIGS. 41A, 41B, and 41C.
In other words, the various motor connecting structures as
illustrated in FIGS. 41A, 41B, and 41C can be coupled with the
photosensitive unit 2010C of the present embodiment, so as to
provide different ways to electrically connect the motor unit.
Therefore, person skilled in the art should understand that what
are shown in the appended drawings shall not limit the scope of the
present invention.
[0633] Those skilled in the art should understand that the
structures and forms of the camera module mentioned above are just
examples to describe ways of implementing the camera module, rather
than limitations of the present invention.
[0634] Referring to FIGS. 55 and 56, the photosensitive unit and
camera module according to a nineteenth preferred embodiment of the
present invention are illustrated. The photosensitive unit 2010F is
adapted for assembling and producing camera module to achieve the
molded camera module. The photosensitive unit 2010F includes an
encapsulation portion 2011F and a photosensitive portion 2012F,
wherein the encapsulation portion 2011F is molded to connect with
the photosensitive portion 2012F.
[0635] The photosensitive portion 2012F includes a main circuit
board 20122F and a photosensitive sensor 20121F, wherein the
photosensitive sensor 20121F is disposed on the main circuit board
20122F. According to the present embodiment of the present
invention, the photosensitive sensor 20121F is molded to connect to
the main circuit board 20122F.
[0636] According to the present embodiment of the present
invention, the photosensitive portion 2012F includes a connecting
circuit and at least a circuit element 20123F. The connecting
circuit is prearranged in the main circuit board 20122F and the
circuit element 20123F is electrically connected to the connecting
circuit and the photosensitive sensor 20121F to process the
photosensing function for the photosensitive sensor 20121F. The
circuit element 20123F is protrudingly deployed on the main circuit
board 20122F. The circuit element 20123F can be, for example but
not limited to, resistors, capacitors, diodes, triodes,
potentiometers, electric relays, actuators, or etc.
[0637] It is worth mentioning that the encapsulation portion 2011F
encapsulates and wraps up the circuit element 20123F therein, so
that the circuit element 20123F will not be directly exposed in any
space, and more specifically, not be exposed in the environment
that communicates with the photosensitive sensor 20121F. Therefore,
during the assembling of the camera module, the circuit element
20123F will not contaminate pollutions, such as dusts, or adversely
influence the photosensitive sensor 20121F. It is different from
the conventional camera module that the circuit element 20123F,
such as resistance-capacitance components, is exposed outside. The
enclosure and encapsulation of the photosensitive sensor 20121F by
molding, sundries and dusts are prevented from staying on the
surface of the circuit element 20123F that avoids the
photosensitive sensor 20121F from being contaminated and causes
dark spots and other defectives of the camera module.
[0638] The encapsulation portion 2011F forms a window 201100F to
provide a photosensitive path for the photosensitive sensor
20121F.
[0639] According to the present preferred embodiment of the present
invention, the photosensitive portion 2012F includes at least one
connecting element 20124F for electrically connecting the
photosensitive sensor 20121F with the main circuit board 20122F.
Further, the connecting element 20124F can be embodied to be, for
example but not limited to, gold wire, copper wire, aluminum wire,
and/or silver wire. Especially, the connecting elements 20124F
curvingly connects the photosensitive sensor 20121F and the main
circuit board 20122F.
[0640] It is worth mentioning that the connecting element 20124F is
molded within the encapsulation portion 2011F, so that the
encapsulation portion 2011F, encloses, encapsulates and/or wraps up
the connecting element(s) 20124F and keep them from direct exposure
to the outside. Therefore, during the assembling of the camera
module, the connecting element(s) 20124F will not suffer any
collision or damage, and, at the same time, it reduces the impact
due to the environmental factors, such as temperature, on the
connecting element 20124F and stabilizes the communication and
connection between the photosensitive sensor 20121F and the main
circuit board 20122F. This is completely absent in the traditional
art.
[0641] It is worth mentioning that the encapsulation portion 2011F
encapsulates and wraps up the circuit element 20123F and the
connecting element 20124F, which advantages in protecting the
circuit element 20123F and the connecting element 20124F as well as
obtaining a higher performance camera module. However, those
skilled in the art should understand that the encapsulation portion
2011F shall not be limited in wrapping up the circuit element
20123F and/or the connecting element 20124F. In other words, in
other embodiments of the present invention, the encapsulation
portion 2011F can be directly molded on main circuit board 20122F
without protruded circuit element 20123F or be molded on various
positions, such as the outer sides, the periphery, and etc., of the
circuit element 20123F.
[0642] In addition, each of the photosensitive sensors 20121F has a
photosensitive area 201211F and a non-photosensitive area 201212F,
wherein the non-photosensitive area 201212F is positioned
surrounding the periphery of the photosensitive area 201211F. The
photosensitive area 201211F is adapted for processing
photosensitization. The connecting element 20124F is connected to
the non-photosensitive area 201212F.
[0643] According to the present preferred embodiment of the present
invention, the encapsulation portion 2011F is extended to mold on
the non-photosensitive area 201212F of the photosensitive sensor
20121F, so as to overlappedly mount the photosensitive sensor
20121F on the main circuit board 20122F by means of molding. In
this manner, such as by the method of Molding on Chip, the moldable
area is extended towards the inside of the encapsulation portion
2011F, such that the structural portion outside of the
encapsulation portion 2011F and the main circuit board 20122F can
be reduced, that further reduces the size in length and width of
the molded photosensitive portion 2012F and reduces the size in
length and width of the camera module assembled thereby.
[0644] In the present embodiment of the present invention, the
encapsulation portion 2011F is protrudingly positioned surrounding
the outer portion of the photosensitive area 201211F of the
photosensitive sensor 20121F. Particularly, the encapsulation
portion 2011F integrally seal its connection, so as to provide a
great sealingness and tightness. Therefore, when the photosensitive
unit 2010F is used to assemble the camera module, the
photosensitive sensor 20121F will be sealed inside the camera
module to forms a sealed inner space.
[0645] Particularly, in producing the photosensitive unit 2010F, a
conventional circuit board can be used to make the main circuit
board 20122F. The photosensitive sensor 20121F is deployed on the
main circuit board 20122F and electrically connected by the
connecting elements 20124F. Then, after the main circuit board
20122F and the photosensitive sensor 20121F are initially
assembled, they are processed by Surface Mount Technology (SMT) and
then molded by the insert molding technique, for example by means
of an injection molding machine, to form the encapsulation portion
2011F, or molded by the pressing molding technique, which is
commonly applied in semiconductor packaging, to form the
encapsulation portion 2011F. The main circuit board 20122F can
selectively be, for example but not limited to, rigid-flex board,
ceramic substrate (without flexible board), or rigid PCB (without
flexible board). The formation of the encapsulation portion 2011F
can be selected by, for example but not limited to, injection
molding technique and pressing molding technique. The material of
the encapsulation portion 2011F can be, for example but not limited
to, nylon, liquid crystal polymer (LCP), or polypropylene (PP) for
injection molding technique, or epoxy resin for pressing molding
technique. Person skilled in the art should understand that the
above available manufacture methods and available materials are
examples to describe available implementations of the present
invention, rather than limitations of the present invention.
[0646] Furthermore, the encapsulation portion 2011F includes a
covering section 20111F and an optical filter installing section
20112F. The optical filter installing section 20112F is molded
integrally to connect with the covering section 20111F. The
covering section 20111F is molded to attach on the main circuit
board 20122F for encapsulating and wrapping up the circuit element
20123F and the connecting element 20124F. The optical filter
installing section 20112F is arranged for installing an optical
filter 2020F. In other words, when the photosensitive unit 2010F is
used to assemble the camera module, the optical filter 2020F of the
camera module will be mounted at the optical filter installing
section 20112F, which makes the optical filter 2020F be positioned
along the photosensitive path of the photosensitive sensor 20121F
without the need of any additional mounting frame of the optical
filter 2020F. In other words, the encapsulation portion 2011F of
the present embodiment has a function as a conventional optical
filter frame while the top portion of the optical filter installing
section 20112F has a good evenness and smoothness by means of the
molding technique, that enables the optical filter 2020F to be
installed evenly, that is superior to conventional camera
modules.
[0647] In addition, the optical filter installing section 20112F
has an installing groove 201121F. The installing groove is
communicated with the window 201100F to provide an adequate
installation space for the optical filter 2020F such that the
optical filter 2020F will not protrude from the top surface of the
optical filter installing section 20112F. In other words, the top
of the encapsulation portion 2011F with the installing groove
201121F provided therein is adapted for the optical filter 2020F to
be installed on the encapsulation portion 2011F without protruding
out from the top of the encapsulation portion 2011F.
[0648] It is worth mentioning that the inner wall of the
encapsulation portion 2011F can be shaped with respect to the
object such as the optical filter to be connected. For example, it
can be in an inclined or slope shape, so that while the connecting
elements 20124F are encapsulated and wrapped, the photosensitive
sensor 20121F can still receive more light through the window and
the installing groove. Person skilled in the art should understand
that a specific shape of the encapsulation portion 2011F will not
limit the scope of the present invention.
[0649] The differences between this nineteenth preferred embodiment
with the other preferred embodiments of the present invention, one
or more reinforced holes 201221F are formed on top of the main
circuit board 20122F and the bottom of the encapsulation portion
2011F is molded to extend into the reinforced holes 201221F, so as
to enhance the structural strength of the main circuit board 20122F
and connection of the main circuit board 122F and the encapsulation
portion 11F. In other words, the combination of two different
materials forms a combined composite structure that reinforces the
structural strength of the main circuit board 20122F, as a
base.
[0650] The positions of the reinforced holes 201221F can be
determined based on practical needs. Also, based on the need of the
structural strength of the circuit board, the reinforced holes
10224D can be, for example, arranged in a symmetrical construction.
By reinforcing the structural strength of the main circuit board
20122F with such reinforced holes 201221F which are filled with the
encapsulation portion, the thickness of the main circuit board
20122F and the thickness of the camera module assembled thereof can
thus be reduced. Besides, the heat dissipative ability of the
photosensitive unit 2010F is enhanced as well.
[0651] It is worth mentioning that, according to the present
preferred embodiment of the present invention, the reinforced holes
201221F are indented slots that avoid the molding material of the
encapsulation portion 2011F from leaking through the reinforced
holes 201221F when molding to make the photosensitive unit
2010F.
[0652] Similar to the above preferred embodiments, the
photosensitive unit 2010F can be assembled for a fixed focus module
or zoom lens module. Those skilled in the art should understand
that the assembling and application ways of the photosensitive unit
2010F shall not considered be limitations of the present
invention.
[0653] Referring to FIGS. 57 and 58, the photosensitive unit and
camera module to according to a twentieth preferred embodiment of
the present invention are illustrated. The photosensitive unit
2010G is adapted for assembling and producing camera module to
achieve the molded camera module. The photosensitive unit 2010G
includes an encapsulation portion 2011G and a photosensitive
portion 2012G, wherein the encapsulation portion 2011G is molded to
connect with the photosensitive portion 2012G.
[0654] The photosensitive portion 2012G includes a main circuit
board 20122G and a photosensitive sensor 20121G, wherein the
photosensitive sensor 20121G is disposed on the main circuit board
20122G. According to the present embodiment of the present
invention, the photosensitive sensor 20121G is molded to connect to
the main circuit board 20122G.
[0655] According to the present embodiment of the present
invention, the photosensitive portion 2012G includes a connecting
circuit and at least a circuit element 20123G. The connecting
circuit is prearranged in the main circuit board 20122G and the
circuit element 20123G is electrically connected to the connecting
circuit and the photosensitive sensor 20121G to process the
photosensing function for the photosensitive sensor 20121G. The
circuit element 20123G is protrudingly deployed on the main circuit
board 20122G. The circuit element 20123G can be, for example but
not limited to, resistors, capacitors, diodes, triodes,
potentiometers, electric relays, actuators, or etc.
[0656] It is worth mentioning that the encapsulation portion 2011G
encapsulates and wraps up the circuit element 20123G therein, so
that the circuit element 20123G will not be directly exposed in any
space, and more specifically, not be exposed in the environment
that communicates with the photosensitive sensor 20121G. Therefore,
during the assembling of the camera module, the circuit element
20123G will not contaminate pollutions, such as dusts, or adversely
influence the photosensitive sensor 20121G. It is different from
the conventional camera module that the circuit element 20123G,
such as resistance-capacitance components, is exposed outside. The
enclosure and encapsulation of the photosensitive sensor 20121G by
molding, sundries and dusts to are prevented from staying on the
surface of the circuit element 20123G that avoids the
photosensitive sensor 20121G from being contaminated and causes
dark spots and other defectives of the camera module.
[0657] The encapsulation portion 2011G forms a window 201100G to
provide a photosensitive path for the photosensitive sensor
20121G.
[0658] According to the present preferred embodiment of the present
invention, the photosensitive portion 2012G includes at least one
connecting element 20124G for electrically connecting the
photosensitive sensor 20121G with the main circuit board 20122G.
Further, the connecting element 20124G can be embodied to be, for
example but not limited to, gold wire, copper wire, aluminum wire,
and/or silver wire. Especially, the connecting elements 20124G
curvingly connects the photosensitive sensor 20121G and the main
circuit board 20122G.
[0659] It is worth mentioning that the connecting element 20124G is
molded within the encapsulation portion 2011G, so that the
encapsulation portion 2011G, encloses, encapsulates and/or wraps up
the connecting element(s) 20124G and keep them from direct exposure
to the outside. Therefore, during the assembling of the camera
module, the connecting element(s) 20124G will not suffer any
collision or damage, and, at the same time, it reduces the impact
due to the environmental factors, such as temperature and humidity,
on the connecting element 20124G and stabilizes the communication
and connection between the photosensitive sensor 20121G and the
main circuit board 20122G. This is completely absent in the
traditional art.
[0660] It is worth mentioning that the encapsulation portion 2011G
encapsulates and wraps up the circuit element 20123G and the
connecting element 20124G, which advantages in protecting the
circuit element 20123G and the connecting element 20124G as well as
obtaining a higher performance camera module. However, those
skilled in the art should understand that the encapsulation portion
2011G shall not be limited in wrapping up the circuit element
20123G and/or the connecting element 20124G. In other words, in
other embodiments of the present invention, the encapsulation
portion 2011G can be directly molded on main circuit board 20122G
without protruded circuit element 20123G or be molded on various
positions, such as the outer sides, the periphery, and etc., of the
circuit element 20123G.
[0661] In addition, each of the photosensitive sensors 20121G has a
photosensitive area 201211G and a non-photosensitive area 201212G,
wherein the non-photosensitive area 201212G is positioned
surrounding the periphery of the photosensitive area 201211G. The
photosensitive area 201211G is adapted for processing
photosensitization. The connecting element 20124G is connected to
the non-photosensitive area 201212G.
[0662] According to the present preferred embodiment of the present
invention, the encapsulation portion 2011G is extended to mold on
the non-photosensitive area 201212G of the photosensitive sensor
20121G, so as to overlappedly mount the photosensitive sensor
20121G on the main circuit board 20122G by means of molding. In
this manner, such as by the method of Molding on Chip, the moldable
area of the encapsulation portion 2011G can be extended inwardly,
such that the outer structural portion of the encapsulation portion
2011G and the main circuit board 20122G can be reduced, which
further reduces the size in length and width of the molded
photosensitive portion 2012G and reduces the size in length and
width of the camera module assembled thereby.
[0663] In the present embodiment of the present invention, the
encapsulation portion 2011G is protrudingly positioned surrounding
the outer portion of the photosensitive area 201211G of the
photosensitive sensor 20121G. Particularly, the encapsulation
portion 2011G integrally seal its connection, so as to provide a
great sealingness and tightness. Therefore, when the photosensitive
unit 2010G is used to assemble the camera module, the
photosensitive sensor 20121G will be sealed inside the camera
module to forms a sealed inner space.
[0664] Particularly, in producing the photosensitive unit 2010G, a
conventional circuit board can be used to make the main circuit
board 20122G. The photosensitive sensor 20121G is deployed on the
main circuit board 20122G and electrically connected by the
connecting elements 20124G. Then, after the main circuit board
20122G and the photosensitive sensor 20121G are initially
assembled, they are processed by Surface Mount Technology (SMT) and
then molded by the insert molding technique, for example by means
of an injection molding machine, to form the encapsulation portion
2011G, or molded by the pressing molding technique, which is
commonly applied in semiconductor packaging, to form the
encapsulation portion 2011G. The main circuit board 20122G can
selectively be, for example but not limited to, rigid-flex board,
ceramic substrate (without flexible board), or rigid PCB (without
flexible board). The formation of the encapsulation portion 2011G
can be selected by, for example but not limited to, injection
molding technique and pressing molding technique. The material of
the encapsulation portion 2011G can be, for example but not limited
to, nylon, liquid crystal polymer (LCP), or polypropylene (PP) for
injection molding technique, or epoxy resin for pressing molding
technique. Person skilled in the art should understand that the
above available manufacture methods and available materials are
examples to describe available implementations of the present
invention, rather than limitations of the present invention.
[0665] Furthermore, the encapsulation portion 2011G includes a
covering section 20111G and an optical filter installing section
20112G. The optical filter installing section 20112G is molded
integrally to connect with the covering section 20111G. The
covering section 20111G is molded to attach on the main circuit
board 20122G for encapsulating and wrapping up the circuit element
20123G and the connecting element 20124G. The optical filter
installing section 20112G is arranged for installing an optical
filter 2020G. In other words, when the photosensitive unit 2010G is
used to assemble the camera module, the optical filter 2020G of the
camera module will be mounted at the optical filter installing
section 20112G, which makes the optical filter 2020G be positioned
along the photosensitive path of the photosensitive sensor 20121G
without the need of any additional mounting frame of the optical
filter 2020G. In other words, the encapsulation portion 2011G of
the present embodiment has a function as a conventional optical
filter frame while the top portion of the optical filter installing
section 20112G has a good evenness and smoothness by means of the
molding technique, that enables the optical filter 2020G to be
installed evenly, that is superior to conventional camera
modules.
[0666] In addition, the optical filter installing section 20112G
has an installing groove 201121G. The installing groove 201121G is
communicated with the window 201100G to provide an adequate
installation space for the optical filter 2020G such that the
optical filter 2020G will not protrude from the top surface of the
optical filter installing section 20112G. In other words, the top
of the encapsulation portion 2011F with the installing groove
201121F provided therein is adapted for the optical filter 2020F to
be installed on the encapsulation portion 2011F without protruding
out from the top of the encapsulation portion 2011F.
[0667] It is worth mentioning that the inner wall of the
encapsulation portion 2011G is designed according to the shape of
the connecting element 20124G to be mounted thereon. For example,
it can be in sloped or inclined shape, so that while it
encapsulates and wraps up the connecting element(s) 20124G, the
photosensitive sensor 20121G is capable of receiving as much light
as possible. Person skilled in the art should understand that a
specific shape of the encapsulation portion 2011G will not limit
the scope of the present invention.
[0668] The differences between this twentieth preferred embodiment
with the other preferred embodiments of the present invention, one
or more reinforced holes 201221G are formed on top of the main
circuit board 20122G and the bottom of the encapsulation portion
2011G is molded to extend into the reinforced holes 201221G, so as
to enhance the structural strength of the main circuit board 20122G
and connection of the main circuit board 122F and the encapsulation
portion 11F. In other words, the combination of two different
materials forms a combined composite structure that reinforces the
structural strength of the main circuit board 20122G, as a
base.
[0669] The positions of the reinforced holes 201221G can be
determined based on practical needs. Also, based on the need of the
structural strength of the circuit board, the reinforced holes
10224D can be, for example, arranged in a symmetrical construction.
By reinforcing the structural strength of the main circuit board
20122G with such reinforced holes 201221G which are filled with the
encapsulation portion 11F, the thickness of the main circuit board
20122G and the thickness of the camera module assembled thereof can
thus be reduced. Besides, the heat dissipative ability of the
photosensitive unit 2010G is enhanced as well.
[0670] It is worth mentioning that, according to the present eighth
preferred embodiment of the present invention, the reinforced holes
201221G are through holes penetrating through the main circuit
board 20122G to communicate both sides of the main circuit board
20122G. Therefore, during the production of the photosensitive unit
2010G, the molding material of the encapsulation portion 2011G can
be fully bonded with the main circuit board 20122G to form a more
solid structure of combined composite material. Besides, the
through hole type reinforced hole of this preferred embodiment
would be more easy to make than the indention type reinforced hole
in the above seventh preferred embodiment.
[0671] Referring to FIGS. 57-58, the camera module 20100G includes
one photosensitive unit 2010G, one optical filter 2020G, a motor
unit 2040G, and a camera lens 2030G.
[0672] The optical filter 2020G is mounted in the photosensitive
unit 2010G, while the camera lens 2030G is mounted in the motor
unit 2040G. The motor unit 2040G is mounted on the photosensitive
unit 2010G.
[0673] Furthermore, the optical filter 2020G is mounted on the
installing groove of the encapsulation portion 2011G of the
photosensitive unit 2010G. The motor unit 2040G is mounted on the
top portion of the encapsulation portion 2011G of the
photosensitive unit 2010G. Particularly, the specific installation
positions of the optical filter 2020G and the motor unit 2040G at
the encapsulation portion 2011G can be coordinated and arranged
based on practical needs.
[0674] Especially, the motor unit 2040G is electrically connected
with the photosensitive unit 2010G through the motor connecting
structure 2013. The motor terminal 2041G of the motor unit 2040G is
electrically connected with the circuit connection junction 20132
of the photosensitive unit 2010, so as to be electrically connected
to the main circuit board 20122 through the lead element 20131. The
motor terminal 2041G can be connected to the motor coupling
terminal 201311 of the lead element 20131 by attaching with
conducting adhesive or by welding and soldering.
[0675] Especially, when the motor terminal 2041G is affixed on the
circuit junction by attaching with conducting adhesive, it does not
require to solder any lead wire for connecting the motor unit 2040G
with the main circuit board 20122 of the photosensitive portion
2012, and thus it reduces the motor soldering process.
[0676] It is worth mentioning that the electrical connection of the
motor unit 2040G is described as electrical connecting the motor
unit 2040G by the lead element 20131 according to the present
embodiment of the present invention, but in other embodiments of
the present invention, it is possible to apply different motor
connecting structures 2013 to connect the motor unit 2040G. For
example, the various methods as shown in FIGS. 41A, 41B, and 41C.
In other words, the various motor connecting structures as
illustrated in FIGS. 41A, 41B, and 41C can be coupled with the
photosensitive unit 2010G of the present embodiment, so as to
provide different ways to electrically connect the motor unit.
Therefore, person skilled in the art should understand that what
are shown in the appended drawings shall not limit the scope of the
present invention.
[0677] Similar to the above preferred embodiments, the
photosensitive unit 2010G can be assembled for a fixed focus module
or zoom lens module. Those skilled in the art should understand
that the assembling and application ways of the photosensitive unit
2010G shall not considered be limitations of the present
invention.
[0678] Referring to FIG. 59, the camera module with its
photosensitive unit according to a twenty-one preferred embodiment
of the present invention is illustrated. The different of this
tenth preferred embodiment with respect to the other preferred
embodiments, the photosensitive unit 2010 includes a shielding
layer 201261 that covers the main circuit board 20122 and the
encapsulation portion 2011, so as to not only reinforce the
structural strength of the main circuit board 20122, but also
enhance an electromagnetic immunity ability of the photosensitive
unit 2010.
[0679] Furthermore, the shielding layer 201261 is a metal layer
that can be made in form of plate structure or net structure.
[0680] Because the module of the present invention is integrally
encapsulated to form based on integrally encapsulation technology,
the embodiments of the present invention utilize molding technique
of the encapsulation technology as example for illustration. Hence,
in order to better and clearer disclose the content of the present
invention, molding technique will firstly be briefly introduced as
follows. Molding technique is usually implemented in two types. One
is Molding On Board (MOB), which is to only form an encapsulation
portion on the circuit board of the module. The other is Molding On
Board (MOC), which is to form an encapsulation portion on both the
circuit board and the photosensitive sensor of the module. The
present invention will respectively disclose embodiments of
different molding types in the following.
[0681] Besides, molding technique usually includes injection
molding technique and pressing molding technique based on the
devices. The injection molding technique includes compression
molding and pressure casting. An injection molding machine is a
major forming device that utilizes plastic forming mold to turn
thermoplastic material or thermosetting material into plastic
products of various shapes. Injection molding is implemented
through injection molding machine and mold. The pressing molding
technique includes pressing and molding, which can also be called
compression molding.
[0682] Mold pressing materials, such as plastic or rubber
materials, can be heated and compressed in a closed mold cavity to
be formed into the product. It utilizes the pressing molding
technique of the molding technique as example to illustrate the
present invention. However, person skilled in the art should be
able to understand that the present invention shall not be
restricted in pressing molding technique. Instead, other
encapsulation or molding techniques may also apply. Hence, the
present invention shall not be limited thereby.
[0683] FIG. 60 illustrates a camera module based on integrally
encapsulation technology according to a preferred embodiment of the
present invention, which utilizes MOB technology. The camera module
based on integrally encapsulation technology includes an
encapsulated photosensitive unit 3010, an optical filter 3020, a
camera lens 3030, and motor unit 3040. Person skilled in the art
should be able to understand that the motor unit 3040 can be absent
in other embodiments of fixed focus modules. Therefore, the present
invention shall not be limited thereby. In other words, this
preferred embodiment of the present invention utilizes the
automatic focus camera module as the example. The encapsulated
photosensitive unit 3010 includes an encapsulation portion 3011 and
a photosensitive unit 3012. The photosensitive unit 3012 further
comprises a photosensitive sensor 30121 and a circuit board 30122,
which comprises a set of circuit component(s) 30123 (e.g. resistor,
capacitor, actuator, and etc.; IC hereinafter) and a set of lead
element(s) 30124 deployed thereon. The lead element 30124 connects
and communicates the photosensitive sensor 30121 and the circuit
board 30122. Nevertheless, the photosensitive sensor 30121 and the
circuit board 30122 may also be connected and communicated through
other means. In the present preferred embodiment of the present
invention, the lead element 30124 may be embodied to be a gold
wire. The encapsulation portion 3011 serves as a frame to support
the optical filter 3020. The encapsulation portion 3011 has
electrical functions, such as having a carving line to electrically
connect and communicate the motor unit 3040 and the photosensitive
unit 3012, which can substitute conventional motor bonding wire and
reduce conventional technology process. Certainly, the motor unit
3040 and the circuit board 30122 may also be connected and
communicated through welding and soldering conventional motor weld
leg(s). The encapsulation portion 3011 encapsulates the circuit
board 30122 during the encapsulation process. In the present
embodiment of the present invention, the encapsulation portion 3011
encapsulates all portions of the circuit board 30122 besides the
area behind where it contacts the photosensitive sensor 30121 and
the lead element 30124. The encapsulation portion 3011 not only
encapsulates and wraps up the top surface 301221 of the circuit
board 30122, but also encapsulates and wraps up at least a side
301222 of the circuit board 30122. It is understandable that the
encapsulation portion 3011 may also integrally encapsulate the
circuit component 30123 in the encapsulation process.
[0684] The molding module is illustrated in FIGS. 62A-62E.
Referring to FIG. 62A, the left portion of the encapsulation
portion 3011P is aligned and leveled with the circuit board 30122P.
Such design that levels the side of the circuit board 30122P and
the side of the encapsulation portion 3011P can usually be found in
traditional technology as well. Hence, in order to achieve the
above demands, as FIG. 62B illustrates, it has to make the
structure as demonstrated in the figure before assembling the
module. It has to process the circuit board 30122P as illustrated
in FIG. 62B when molding, which includes coupling two or more
circuit boards 30122P for molding and, referring to FIG. 62B,
cutting along the middle with machine. This will require a cutting
device. Without utilizing the method illustrated in FIG. 62B, it is
impossible to align the fringe of the circuit board 30122P to the
encapsulation portion 3011P because there must be a certain
alignment deviation between the circuit board 30122P and the mold.
Therefore, it may only be designed into what was illustrated in
FIG. 62C. Referring to the figure, the circuit board 30122P has to
protrude a little for mold clamping, the protruding length of the
circuit board 30122P is usually 0.1 mm.about.10 mm. Referring to
FIG. 62E, without dicing, the protruding portion of the circuit
board 30122P will affect the final size of the module, which will
increase the module size by 0.1 mm.about.10 mm and affect the
quality of the product.
[0685] Hence, contrasting with traditional technology, the camera
module based on integrally encapsulation technology of the present
invention provides a reduction design on the circuit board 30122,
which has the sides of the encapsulation portion 3011 cover the
sides 301222 of the circuit board 30122, so as to reserve a certain
dislocation space to the circuit board 30122 and the sides of the
encapsulation portion 3011. Therefore, it avoids the circuit board
30122 from protruding from the sides after the molding process,
which reduces the cutting procedure and improves the quality of the
product.
[0686] It is worth mentioning that the encapsulation portion 3011
can encapsulate and cover two sides of the circuit board 30122. In
the present preferred embodiment of the present invention, it only
encapsulates the left side, which is the side 301222, of the
circuit board 30122 because there are other elements, such as the
flexible printed circuit, connected in the right side. Nonetheless,
person skilled in the art should be able to understand that the
encapsulation portion 3011 may not only encapsulate the side 301222
of the circuit board 30122, but also, according to other
embodiments, encapsulate, wrap up and/or enclose the entire or part
of the two sides of the circuit board 30122 at the same time.
Hence, the present invention shall not be limited thereby.
[0687] FIG. 61 illustrates the camera module based on integrally
encapsulation technology of the present invention, which also
utilizes MOB technique, helps the molded module to be installed and
positioned, and enhances the flatness and smoothness thereof. The
camera module based on integrally encapsulation technology
comprises an encapsulated photosensitive unit 3010', an optical
filter 3020', a camera lens 3030', and a motor unit 3040'.
Similarly, it utilizes automatic focus module as example and
discloses the motor unit 3040'. However, for other fixed focus
modules, the motor unit 3040' is not required. Thus, the present
invention shall not be limited thereby.
[0688] Specifically, the encapsulated photosensitive unit 3010'
includes an encapsulation portion 3011' and a photosensitive unit
3012'. The photosensitive unit 3012' further comprises a
photosensitive sensor 30121', and a circuit board 30122', which
comprises a set of circuit component 30123' and a set of lead
element 30124' deployed thereon. The encapsulation portion 3011'
serves as a frame to support the optical filter 3020. The carving
line of the encapsulation portion 3011' electrically connects and
communicates the motor unit 3040' and the photosensitive unit
3012'. Comparing with the above preferred embodiment of the present
invention, the encapsulation portion 3011' moldingly encapsulates
and covers not only the top surface 301221' and at least a side
301222' of the circuit board 30122', but also a bottom 301223' of
the circuit board 30122' when encapsulating the circuit board
30122' the circuit component 30123' during the molding process.
Therefore, it ensures the overall evenness and smoothness of the
sides and bottom of the camera module based on integrally
encapsulation technology after the molding process, so as to
facilitate its installation and positioning on other tooling.
[0689] It is worth mentioning that the encapsulation portion 3011'
may encapsulate, wrap up and/or enclose the entire of the bottom
301223' of the circuit board 30122', but, according to other
embodiments and based on different needs, it may encapsulate, wrap
up and/or enclose only part of the bottom 301223' of the circuit
board 30122'. Hence, the present invention shall not be limited
thereby.
[0690] It is worth mentioning that according to this preferred
embodiment of the present invention, because the right side of the
camera module, as the figure illustrated, is still available for
other processing or being connecting with other elements, hence the
right side of the circuit board 30122' is not encapsulated.
Nonetheless, according to other embodiments, the encapsulation
portion 3011' can also encapsulate, wrap up and/or enclose the two
sides or more sides of the circuit board 30122' as well as part or
all of the bottom 301223' of the circuit board 30122'. The present
invention shall not be limited thereby.
[0691] The embodiments illustrated in FIGS. 60 and 61 are disclosed
in MOB type, but the following alternative modes switch to MOC type
and combine various module structures to disclose the encapsulation
of the module on the side or bottom of the circuit board.
[0692] FIG. 63A illustrates the camera module based on integrally
encapsulation technology according to another embodiment of the
present invention. The camera module based on integrally
encapsulation technology includes an encapsulation portion 3011A, a
photosensitive unit 3012A, an optical filter 3020A, and a camera
lens 3030. The photosensitive unit 3012A further comprises a
photosensitive sensor 30121A and a circuit board 30122A, which
comprises a set of circuit component 30123A and a set of lead
element 30124A deployed thereon. The encapsulation portion 3011A
serves as a frame to support the optical filter 3020A and is
directly formed in the area besides the photosensitive area of the
chip on the circuit board 30122A. In other words, this embodiment
of the present invention utilizes the MOC style. It is worth
mentioning that the photosensitive sensor 30121A comprises a
photosensitive area 301211A and a non-photosensitive area 301212A
besides the photosensitive area 301211A. The encapsulation portion
3011A does not encapsulate the photosensitive area 301211A during
the encapsulation. Instead, it encapsulates the non-photosensitive
area 301212A of the photosensitive sensor 30121A. The
non-photosensitive area 301212A further comprises a terminal
disposed thereon for connecting with the lead element 30124A, so as
for the connection and communication of the photosensitive sensor
30121A.
[0693] Similarly, in the camera module based on integrally
encapsulation technology illustrated in FIG. 63A, a reduction
design is utilized on the circuit board 30122A, which has the sides
of the encapsulation portion 3011A cover the sides 301222A of the
circuit board 30122A, so as to reserve a certain dislocation space
to the circuit board 30122A and the sides of the encapsulation
portion 3011A. Therefore, it avoids the circuit board 30122A from
protruding from the sides after the molding process. Besides, the
encapsulation portion 3011A can encapsulate and cover a plurality
of sides of the circuit board 30122A according to other alternative
modes of the present embodiment.
[0694] FIG. 63B illustrates the camera module based on integrally
encapsulation technology according to another embodiment of the
present invention. This differs from the embodiment illustrated in
FIG. 63A in that the encapsulation portion 3011A' moldingly
encapsulates and covers not only the top surface 301221A' and at
least a side 301222A' of the circuit board 30122A', but also a
bottom 301223A' of the circuit board 30122A' when encapsulating the
circuit board 30122A' the circuit component 30123A'. Therefore, it
ensures the overall evenness and smoothness of the sides and bottom
of the camera module based on integrally encapsulation technology
after the molding process, so as to facilitate its installation and
positioning on other tooling.
[0695] FIG. 64 illustrates the camera module based on integrally
encapsulation technology according to another embodiment of the
present invention. This differs from the embodiment illustrated in
FIG. 63A is in the design and structure of the top portion of the
encapsulation portion 3011B. In the embodiment illustrated in FIG.
63A, the top portion of the encapsulation portion 3011A protrudes
upward and provides a clearance slot 301121A between it and the
side edge of the optical filter 3020A, so as for installing various
camera lens or motor unit. The clearance slot is absent in the
embodiment as shown in FIG. 64. In addition, a reinforcing plate
30125B is attached on the bottom side of the circuit board 30122B.
The reinforcing plate 30125B can be embodied to be a metal plate.
The rest structures are the same with the structures illustrated in
FIG. 63A. The encapsulation portion 3011B covers and encloses,
encapsulates and/or wraps up and integrates the top surface 301221B
and at least a side 301222B of the circuit board 30122B, the side
of the reinforcing plate 30125B, the non-photosensitive area
301212B of the photosensitive sensor 30121B, the circuit component
30123B, and the lead element 30124B.
[0696] FIG. 65 illustrates the camera module based on integrally
encapsulation technology according to another embodiment of the
present invention. This differs from the embodiment illustrated in
FIG. 64 is in that the encapsulation portion 3011B' moldingly
encapsulates and covers not only the top surface 301221B' and at
least a side 301222B' of the circuit board 30122B', but also a
bottom of the reinforcing plate 30125B'. Therefore, it ensures the
overall evenness and smoothness of the sides and bottom of the
camera module based on integrally encapsulation technology after
the molding process, so as to facilitate subsequent installation
and positioning.
[0697] The module structure illustrated in FIG. 66A is an
alternative mode of the module structure of the embodiment
illustrated in FIG. 64. The only difference between them is that
the optical filter 3020C is placed on the photosensitive sensor
30121C, so as to be encapsulated and wrapped up together by means
of the encapsulation portion 3011C. In this manner, it can reduce
the damage on the photosensitive sensor 30121C during the
encapsulation and utilization and decrease the back focal length of
the camera lens, so as to reduce the size thereof.
[0698] Similarly, the module structure illustrated in FIG. 66B is
an alternative mode of the module structure of the embodiment
illustrated in FIG. 65. The only difference between them is that
the optical filter 3020C' is placed on the photosensitive sensor
30121C', so as to be encapsulated and wrapped up together by means
of the encapsulation portion 3011C'. In this manner, it can reduce
the damage on the photosensitive sensor 30121C' during the
encapsulation and utilization and decrease the back focal length of
the camera lens, so as to reduce the size thereof. Besides, it can
also reduce the height thereof and dissipate heat generated by the
photosensitive sensor 30121C, which provides great heat
dissipation.
[0699] FIG. 67A is an alternative mode of the structure of the
module according to the embodiment of FIG. 66A. It is mainly an
alternative mode of the encapsulation portion 3011D. The top
portions of the encapsulation portion 3011D are respectively
upwardly extended to form the supporting walls 30113D. The
supporting walls 30111D form an accommodating groove 301131D for
accommodating the camera lens. In other words, the encapsulation
portion 3011D can support the camera lens directly, so as to make a
high accuracy fixed focus module.
[0700] FIG. 67B is an alternative mode of the structure of the
module according to the embodiment of FIG. 66B. It is mainly an
alternative mode of the encapsulation portion 3011D'. The
encapsulation portion 3011D' covers the bottom side of the circuit
board 30121D'. The top portions of the encapsulation portion 3011D'
are respectively upwardly extended to form the supporting walls
30111D'. The supporting walls 30111D' form an accommodating groove
1111D' for accommodating the camera lens. In other words, the
encapsulation portion 3011D can support the camera lens directly,
so as to make a high accuracy fixed focus module.
[0701] FIGS. 68A and 68B illustrate alternative modes of the
structure of the module according to the embodiment as illustrated
in FIG. 67A. It is mainly an alternative mode of the encapsulation
portion 3011E. Therefore, the circuit board 30121E has one or more
through holes 30126E arranged thereon, so that the molding material
that forms the encapsulation portion 3011E can enter the through
hole 30126E and be embedded into the through hole 30126E, so as to
further enhance the reinforcement for the circuit board 30121E.
Similarly, the encapsulation portion 3011E may not only covers and
encloses, encapsulates and/or wraps up the top surface of the
circuit board 30121E, but also covers and encloses, encapsulates
and/or wraps up the sides and bottom side of the circuit board
30121E. It is understandable that this manner of deploying through
hole 30126E on the circuit board 30121E can also be utilized in
other embodiments of the present invention.
[0702] It is worth mentioning that when a motor unit is needed to
be connected for the embodiments illustrated in FIGS. 63A-66B based
on the MOC technique thereof, it may utilize the connection modes
that communicates the motor terminal and the circuit board
illustrated in FIGS. 69-71.
[0703] FIG. 69 illustrates a structure, according to an alternative
mode, which utilizes the MOC technique. The camera module based on
integrally encapsulation technology includes an encapsulated
photosensitive unit, an optical filter 3020F, a camera lens 3030F,
and a motor unit 3040F. In other words, this preferred embodiment
of the present invention utilizes the automatic focus camera module
as the example. The encapsulated photosensitive unit includes an
encapsulation portion 3011F and a photosensitive unit 3012F. The
photosensitive unit 3012F further comprises a photosensitive sensor
30121F, a circuit board 30122F, a set of circuit component 30123F,
and a set of lead element 30124F. The lead element 30124F connects
and communicates the photosensitive sensor 30121F and the circuit
board 30122F. In the present embodiment of the present invention,
the lead element 30124F may be embodied to be a gold wire. The
encapsulation portion 3011F serves as a frame to support the
optical filter 3020F. The encapsulation portion 3011F encapsulates
the circuit board 30122F during the encapsulation process. In the
present embodiment of the present invention, the encapsulation
portion 3011F encapsulates all portions of the circuit board 30122F
besides the photosensitive area of the photosensitive sensor
30121F. The encapsulation portion 3011F not only encapsulates and
wraps up the top surface 301221F of the circuit board 30122F, but
also encapsulates and wraps up at least a side 301222F of the
circuit board 30122F. It is understandable that the encapsulation
portion 3011F may also integrally encapsulate the circuit component
30123F in the encapsulation process.
[0704] It is worth mentioning that an encapsulation portion
terminal 301101F of the encapsulation portion 3011F is electrically
connected with the motor unit 3040F. It utilizes an internal lead
wire 301102F of the encapsulation portion 3011F to connect and
communicate at least a motor terminal 3041F of the motor unit 3040F
to the circuit board 30122F. In this manner, it does not require
welding and soldering process.
[0705] According to the embodiment illustrated in FIG. 70, it may
also utilize welding and soldering process. The encapsulation
portion 3011G has a groove channel 1103G arranged thereon
communicating the top to the bottom thereof, so as for placing the
motor terminal 3041G, such that it can allow the motor terminal
3041G to pass through the groove channel 1103G for being welded and
soldered on a soldering point 3060G of a circuit board 1231G of the
circuit board 30122G.
[0706] Correspondingly, the structure illustrated in FIG. 71 is
relatively more similar with the structure illustrated in FIGS. 69
and 70. However, the motor terminal for the structure illustrated
in FIGS. 69 and 70 may not be long enough because the encapsulation
portion 303011H thereof is taller, so it can only utilize the
structure illustrated in FIG. 71. In other words, the groove
channel 301103H on the outer wall of the encapsulation portion
303011H is not straight-through. Instead, the motor terminal 3041H
is welded and soldered with the encapsulation portion terminal
301101H of the encapsulation portion 3011H in the groove channel
301103H at a soldering point 3060H. Then, it is connected to the
circuit board 30122H through the internal lead wire 301102H of the
encapsulation portion 3011H, so as to make the connection and
communication between the motor unit and the circuit board.
[0707] In addition, according to another implementation, it may
also form an electroplated conductive circuit on the surface of the
encapsulation portion by means of the Laser Direct Structuring
technique, so as for connecting and communicating the motor unit
and the circuit board. Certainly, the encapsulation portion may
also have no electrical functions illustrated in the above
embodiments, but utilize conventional technology to connect the
motor unit and the circuit board through welding and soldering.
[0708] Person skilled in the art should be able to understand that
the three embodiments illustrated in FIGS. 69-71 are just for
demonstrating examples various ways of communicating the motor unit
and the circuit board when there is a motor unit. The encapsulation
portion according to these three embodiments may not only
encapsulate the top surface and sides of the circuit board, but
also, as the above alternative modes mentioned, encapsulate the
bottom side of the circuit board. Besides, other structures of the
camera module may also have corresponding changes. Therefore, the
present invention shall not be limited thereby.
[0709] Referring to FIGS. 72-74F, a camera module and a
manufacturing method for the camera module according to a preferred
embodiment of the present invention are illustrated. The camera
module comprises at least a camera lens 4030, at least a
photosensitive sensor 4010, at least a protection frame 4060, at
least a circuit board 4070, and at least an integrally encapsulated
frame 4050.
[0710] It is more worth mentioning that the camera module of the
present invention can be a fixed focus camera module or an
automatic focus camera module. In other words, whether the camera
module of the present invention allows focusing shall not limit the
content and scope of the present invention.
[0711] It is more worth mentioning that the camera module of the
present invention can be a single lens camera module or a
multi-lens camera module. For instance, according to an embodiment,
the camera module can also be embodied to be an array camera
module. In other words, the quantity of the camera lens 4030 of the
camera module of the present invention shall not limit the content
and scope of the present invention.
[0712] Specifically speaking, according to this embodiment of the
camera module of the present invention, the protection frame 4060
is protrudingly arranged on the periphery of the photosensitive
area of the photosensitive sensor 4010, wherein the photosensitive
sensor 4010 and the circuit board 4070 are connected and
communicated and the integrally encapsulated frame 4050 is arranged
to cover the circuit board 4070 and the non-photosensitive area of
the photosensitive sensor 4010, so as to integrate the integrally
encapsulated frame 4050, the photosensitive sensor 4010, and the
circuit board 4070 into one unit. Besides, the camera lens 4030 is
deployed along the photosensitive path of the photosensitive sensor
4010. Light reflected from an object can pass through the camera
lens 4030 and be concentrated into the inside of the camera module,
so as to further be received by the photosensitive sensor 4010 for
photoelectric conversion, such that images corresponding to the
object can be generated.
[0713] According to the embodiment of the camera module of the
present invention, the photosensitive sensor 4010 is attached on
the circuit board 4070 and photosensitive sensor 4010 is connected
and communicated with the circuit board 4070 through wire bonding
technique. For example, it can conduct wire bonding between the
non-photosensitive area of the photosensitive sensor 4010 and the
circuit board 4070, so as to connect and communicate the
photosensitive sensor 4010 and the circuit board 4070 through the
gold wires, as FIG. 72 illustrated.
[0714] According to another embodiment of the camera module of the
present invention, the photosensitive sensor 4010 is attached on
the circuit board 4070 and connected and communicated with the
circuit board 4070 at the same time. For instance, the
non-photosensitive area of the photosensitive sensor 4010 may
comprise a chip pad arranged thereon and the circuit board 4070 may
comprise a circuit board pad arranged thereon, such that when the
photosensitive sensor 4010 is attached on the circuit board 4070,
the chip pad of the photosensitive sensor 4010 will be connected
and communicated with the circuit board pad of the circuit board
4070.
[0715] The protection frame 4060 is a hollow structure, such that
the protection frame 4060 can be surroundingly deployed on the
periphery of the photosensitive area of the photosensitive sensor
4010. Preferably, the size of the inner side edge of the protection
frame 4060 is greater than or equal to the size of the
photosensitive area of the photosensitive sensor 4010, such that
when the protection frame 4060 is protrudingly arranged on the
photosensitive sensor 4010, the protection frame 4060 can be
maintained in the periphery of the photosensitive area of the
photosensitive sensor 4010. Therefore, the protection frame 4060
will not obstruct or shade the photosensitive area of the
photosensitive sensor 4010.
[0716] Preferably, the size of the outer side edge of the
protection frame 4060 is smaller than the size of the
photosensitive sensor 4010, such that when the protection frame
4060 is protrudingly arranged on the photosensitive sensor 4010,
the photosensitive sensor 4010 and the circuit board 4070 can be
connected and communicated with each other through wire bonding in
the outer side of the non-photosensitive area of the photosensitive
sensor 4010. Nevertheless, person skilled in the art should be able
to understand that when the photosensitive sensor 4010 and the
circuit board 4070 are connected and communicated through chip pad
and circuit board pad, the dimensions of the outer side edge of the
protection frame 4060 can be consistent to the dimensions of the
photosensitive sensor 4010.
[0717] When the integrally encapsulated frame 4050 is formed, it
covers the circuit board 4070 and the non-photosensitive area of
the photosensitive sensor 4010, so as to integrate the integrally
encapsulated frame 4050, the circuit board 4070, and the
photosensitive sensor 4010 into one unit, such that it can enhance
the structural stability of the camera module and reduce the size
and volume of the camera module, which allows the camera module to
be utilized in the electronic devices that are expected to be more
compact.
[0718] Further, the integrally encapsulated frame 4050 is arranged
to cover the periphery of the protection frame 4060, so as to
integrate the integrally encapsulated frame 4050, the circuit board
4070, the protection frame 4060, and the photosensitive sensor
4010.
[0719] Further, referring to FIG. 72, the camera module comprises
at least a camera lens support 4040, arranged on the top of the
integrally encapsulated frame 4050. The camera lens 4030 is
arranged on the camera lens support 4040, such that the camera lens
4030 can be maintained along the photosensitive path of the
photosensitive sensor 4010 by means of the camera lens support
4040.
[0720] According to the embodiment of the camera module of the
present invention, after the camera lens support 4040 is formed, it
will be arranged on the top of the integrally encapsulated frame
4050. According to another embodiment of the camera module of the
present invention, the camera lens support 4040 can be integrally
formed with the integrally encapsulated frame 4050. In this manner,
it can decrease the encapsulation deviation of the camera module,
which is helpful in enhancing the image quality of the camera
module.
[0721] Preferably, the camera lens support 4040 can be embodied to
be a motor unit. In other words, the camera lens 4030 is operably
arranged on the camera lens support 4040, such that the camera lens
4030 can be driven to move back and forth along the photosensitive
path of the photosensitive sensor 4010 through the camera lens
support 4040, so as to adjust the focal length of the camera module
through alter the distance between the camera lens 4030 and the
photosensitive sensor 4010. It is worth mentioning that the camera
lens support 4040 can be various drivers to drive the camera lens
4030 to move back and forth along the photosensitive path of the
photosensitive sensor 4010. For example, according to this
preferred embodiment of the present invention, the camera lens
support 4040 can be embodied to be a voice coil motor.
[0722] Person skilled in the art should be able to understand that
when the camera lens support 4040 is embodied to be a motor unit,
the camera lens support 4040 and the circuit board 4070 are
connected and communicated.
[0723] Further, referring to FIG. 72, the camera module comprises a
filter 4020, arranged between the camera lens 4030 and the
photosensitive sensor 4010, such that when the light reflected from
an object is concentrated from the camera lens 4030 and projected
to the inside of the camera module, the light will be filtered by
the filter 4020 and then be received by the photosensitive sensor
4010 for photoelectric conversion, which provides a better image
quality of the camera module. In other words, the filter 4020 can
serve to denoise, so as to improve the image quality of the camera
module.
[0724] It is worth mentioning that types of the filter 4020 shall
not be limited. For example, according to an embodiment of the
camera module of the present invention, filter 4020 is embodied as
an infrared-cut filter, so as to utilize the filter 4020 to filter
the infrared of the light. However, according to another embodiment
of the camera module of the present invention, the filter 4020 is
embodied as a visible light filter.
[0725] The integrally encapsulated frame 4050 forms at least a
mounting platform 4051, for the filter 4020 to be mounted. For
instance, the mounting platform 4051 can be an installing groove
formed on the top of the integrally encapsulated frame 4050 or a
plane formed on the top of the integrally encapsulated frame 4050.
In other words, the filter 4020 can be directly attached on the top
portion of the integrally encapsulated frame 4050.
[0726] FIGS. 74A-74F are perspective views of a manufacturing
method for the camera module according to the present invention.
The structural relations among the elements including the camera
lens 4030, the photosensitive sensor 4010, the protection frame
4060, the circuit board 4070, and the integrally encapsulated frame
4050 of the camera module are all illustrated by means of sectional
views in order to facilitate a clear illustration and
description.
[0727] In the step illustrated in FIG. 74A, the photosensitive
sensor 4010 is connected and communicated with the circuit board
4070. Person skilled in the art should be able to understand that,
in the step illustrated in FIG. 74A, when the photosensitive sensor
4010 is attached on the circuit board 4070, it may connect and
communicate the photosensitive sensor 4010 and the circuit board
4030 through wire bonding. Nonetheless, this is just an exemplar
description. Such means of connecting and communicating the
photosensitive sensor 4010 and the circuit board 4070 shall not
limit the content and scope of the present invention. According to
another embodiment of the camera module of the present invention,
the photosensitive sensor 4010 and the circuit board 4070 can also
be directly connected and communicated through a chip bonding pad
and a circuit board bonding pad.
[0728] In the step illustrated in FIG. 74B, the protection frame
4060 is protrudingly arranged on the periphery of the
photosensitive area of the photosensitive sensor 4010. Specifically
speaking, in the manufacturing method for the camera module of the
present invention, after the protection frame 4060 is provided, the
protection frame 4060 is protrudingly arranged on the periphery of
the photosensitive area of the photosensitive sensor 4010.
Preferably, a gluing layer 4080 is formed between the protection
frame 4060 and the periphery of the photosensitive area of the
photosensitive sensor 4010, so as to connect the protection frame
4060 and the periphery of the photosensitive area of the
photosensitive sensor 4010 through the gluing layer 4080.
[0729] According to the embodiment of the camera module of the
present invention, the adhesive is deployed on the periphery of the
photosensitive area of the photosensitive sensor 4010 and/or the
protection frame 4060, so as to form the gluing layer 4080 on the
periphery of the photosensitive area of the photosensitive sensor
4010 and/or the protection frame 4060. In other words, the gluing
layer 4080 is formed on at least a surface of the periphery of the
photosensitive area of the photosensitive sensor 4010 and the
protection frame 4060. Subsequently, the gluing layer 4080 will be
utilized for connecting the protection frame 4060 to the periphery
of the photosensitive area of the photosensitive sensor 4010.
[0730] Preferably, after the adhesive is deployed on the protection
frame 4060 and the periphery of the photosensitive area of the
photosensitive sensor 4010, the adhesive can be solidified through
heat curing or UV curing and be turned into the gluing layer 4080
that connects the protection frame 4060 and the periphery of the
photosensitive area of the photosensitive sensor 4010. According to
another embodiment of the camera module of the present invention,
the protection frame 4060 may carry the gluing layer 4080 already,
such that the protection frame 4060 can be arranged on the
periphery of the photosensitive area of the photosensitive sensor
4010 directly in the encapsulating method for the camera
module.
[0731] In addition, the protection frame 4060 can be formed through
injection molding technique or stamping technique. For example, the
protection frame 4060 can be a plastic part formed through
injection molding technique.
[0732] Referring to FIG. 73, the protection frame 4060 is a hollow
structure, such that the protection frame 4060 can be protrudingly
arranged on the periphery of the photosensitive area of the
photosensitive sensor 4010, so as to isolate the photosensitive
area of the photosensitive sensor 4020 from the external
environment. Therefore, in the subsequent method for encapsulating
the camera module, the protection frame 4060 can avoid contaminants
from entering the photosensitive area of the photosensitive sensor
4010 and rendering defects like dark spots.
[0733] In the step illustrated in FIG. 74C, it utilizes a forming
mold 40100 to form the integrally encapsulated frame when the
camera module is encapsulated. The forming mold 40100 comprises an
upper mold 40101. The inner surface of the upper mold 40101 exerts
pressure on the protection frame 4060, so as to isolate and divide
the photosensitive area of the photosensitive sensor 4010 from the
external environment.
[0734] Person skilled in the art should be able to understand that
the protection frame 4060 is protrudingly arranged on the periphery
of the photosensitive area of the photosensitive sensor 4010, such
that when the inner surface of the upper mold 40101 exerts pressure
on the protection frame 4060, the protection frame 4060 can prevent
the inner surface of the upper mold 40101 from contacting the
photosensitive area of the photosensitive sensor 4010. Therefore,
the protection frame 4060 can avoid the inner surface of the upper
mold 40101 from damaging or scratching the photosensitive area of
the photosensitive sensor 4010.
[0735] Further, referring to an alternative mode of the
manufacturing method for the camera module illustrated in FIG. 76,
the inner surface of the upper mold 40101 is dented to form a
groove 40102 at the area corresponding to the photosensitive area
of the photosensitive sensor 4010, such that as the forming mold
40100 is utilized to form the integrally encapsulated frame 4050,
the groove 40102 can create a safety clearance between the
photosensitive area of the photosensitive sensor 4010 and the inner
surface of the upper mold 40101, so as to further lower the impact
of the upper mold 40101 to the photosensitive sensor 4010 and to
prevent the photosensitive sensor 4010 from being damaged or
scratched by the inner surface of the upper mold 40101.
[0736] Preferably, the protection frame 4060 has resilience, such
that when the inner surface of the upper mold 40101 exert pressure
on the protection frame 4060, the protection frame 4060 can serve
as a cushion to prevent the photosensitive sensor 4010 from being
damaged by the pressure brought by the upper mold 40101. In
addition, due to the limitations of the manufacturing technology of
the photosensitive sensor 4010, the manufacturing technology of the
circuit board 4070, and the attaching technology of the
photosensitive sensor 4010 and the circuit board 4070, when the
photosensitive sensor 4010 is attached on the circuit board 4070,
there could be tilt. As a result, when the inner surface of the
upper mold 40101 presses on the protection frame 4060, the
protection frame 4060 can be distorted, so as to isolate the
photosensitive area of the photosensitive sensor 4010 from the
external environment in order to prevent the molding material for
forming the integrally encapsulated frame 4050 from entering into
the photosensitive area of the photosensitive sensor 4010.
[0737] In the step illustrated in FIG. 74D, the molding material is
added into the upper mold 40101 and forms the integrally
encapsulated frame 4050 after the molding material is solidified.
The integrally encapsulated frame 4050 covers the circuit board
4070 and the non-photosensitive area of the photosensitive sensor
4010, so as to integrate the integrally encapsulated frame 4050,
the circuit board 4070, and the photosensitive sensor 4010.
Preferably, the integrally encapsulated frame 4050 further covers
the periphery of the protection frame 4060, so as to integrate the
integrally encapsulated frame 4050, the circuit board 4070, the
protection frame 4060, and the photosensitive sensor 4010. It is
worth mentioning that the molding material is a fluid material or a
granulated material. After the forming mold 40100 is removed, an
integrally encapsulated and formed unit containing the integrally
encapsulated frame 4050, the circuit board 4070, the protection
frame 4060, and the photosensitive sensor 4010 as FIG. 74E
illustrated can be obtained.
[0738] Person skilled in the art should be able to understand that
the photosensitive area of the photosensitive sensor 4010 is
isolated from the external environment, such that after the molding
material is added into the upper mold 40101, the molding material
will not flow to the photosensitive area of the photosensitive
sensor 4010. Therefore, the protection frame 4060 can avoid the
molding material from damaging the photosensitive area of the
photosensitive sensor 4010. Besides, the protection frame 4060 is
flexible, so that there will not be gap between the protection
frame 4060 and the upper mold 40101 that is pressing the protection
frame 4060. Therefore, "burr" will not occur during the
solidification of the molding material added into the upper mold
40101, which guarantees the image quality of the camera module.
[0739] Further, referring to an alternative mode of the
manufacturing method for the camera module illustrated in FIGS. 75A
and 75B, the inner surface of the upper mold 40101 comprises a
cover film 40102 covered thereon, such that when the inner surface
of the upper mold 40101 presses on the protection frame 4060, the
cover film 40102 deployed on the upper mold 40101 will directly
contact the protection frame 4060, so as to further protect the
photosensitive sensor 4010 with the cover film 40103. Besides, it
is understandable that the cover film 40102 can lower the
difficulty of demolding and increase the sealingness and tightness,
so as to prevent burr from occurring on the inner side of the
integrally encapsulated frame 4050 when the molding material is
being solidified.
[0740] In the step illustrated in FIG. 74F, the filter 4020 and the
camera lens 4030 are respectively arranged in the photosensitive
path of the photosensitive sensor 4010, so as to make the camera
module. Preferably, the filter 4020 is arranged on the integrally
encapsulated frame 4050 and the camera lens 4030 can be maintained
along the photosensitive path of the photosensitive sensor 4010 by
being arranged on the camera lens support 4040 of the integrally
encapsulated frame 4050.
[0741] FIGS. 77A-77G illustrate sectional views of another
manufacturing method for the camera module according to the present
invention. In the step illustrated in FIG. 77A, the photosensitive
sensor 4010 is connected and communicated with the circuit board
4070.
[0742] In the step illustrated in FIG. 77B, the protection frame
4060 is protrudingly arranged on the periphery of the
photosensitive area of the photosensitive sensor 4010. Preferably,
a protective film 4090 is deployed on the top portion of the
protection frame 4060, such that it will be easier to utilize
vacuum suction to hold the protection frame 4060 and attach the
protection frame 4060 on the periphery of the photosensitive area
of the photosensitive sensor 4010. Person skilled in the art should
be able to understand that when the protection frame 4060 is
arranged on the periphery of the photosensitive area of the
photosensitive sensor 4010, the protective film 4090 will be
coordinately covered on the top of the photosensitive area of the
photosensitive sensor 4010, so as to isolate the photosensitive
area of the photosensitive sensor 4010 from the external
environment through the protective film 4090 and the protection
frame 4060. Therefore, it can avoid the molding material from
flowing into the photosensitive area of the photosensitive sensor
4010 subsequently.
[0743] In the step illustrated in FIG. 77C, it exerts pressure on
the protection frame 4060 through the inner surface of the upper
mold 40101 of a forming mold 40100, so as to further isolate and
divide the photosensitive area of the photosensitive sensor 4010
from the external environment.
[0744] In the step illustrated in FIG. 77D, the molding material is
added into the upper mold 40101 and forms the integrally
encapsulated frame 4060 after the molding material is solidified.
The integrally encapsulated frame 4050 covers the circuit board
4070 and the non-photosensitive area of the photosensitive sensor
4010, so as to integrate the integrally encapsulated frame 4050,
the circuit board 4070, and the photosensitive sensor 4010.
Preferably, the integrally encapsulated frame 4050 further covers
the periphery of the protection frame 4060, so as to integrate the
integrally encapsulated frame 4050, the circuit board 4070, the
protection frame 4060, and the photosensitive sensor 4010. After
the forming mold 40101 is removed, an integrally encapsulated and
formed unit containing the integrally encapsulated frame 4050, the
circuit board 4070, the protection frame 4060, and the
photosensitive sensor 4010 as FIG. 77E illustrated can be obtained,
wherein the protective film 4090 is still disposed on the
protection frame 4060.
[0745] In the step illustrated in FIG. 77F, the protective film
4090 is removed from the protection frame 4060, so as to obtain an
integrally encapsulated and formed unit containing the integrally
encapsulated frame 4050, the circuit board 4070, the protection
frame 4060, and the photosensitive sensor 4010.
[0746] In the step illustrated in FIG. 77G, the filter 4020 and the
camera lens 4030 are respectively arranged in the photosensitive
path of the photosensitive sensor 4010, so as to make the camera
module.
[0747] Referring to FIGS. 78-80G, the camera module according to
another preferred embodiment of the present invention is
illustrated. The camera module comprises at least a camera lens
4030A, at least a photosensitive sensor 4010A, at least a
protection frame 4060A, at least a circuit board 4070A, at least an
integrally encapsulated frame 4050A, and at least a filter 4020A.
The photosensitive sensor 4010A and the circuit board 4070A is
connected and communicated. The filter 4020A is overlappedly
arranged on the photosensitive sensor 4010A. The protection frame
4060A is arranged on the periphery of the filter 4020A, such that
the protection frame 4060A will not obstruct or shade the
photosensitive area of the photosensitive sensor 4010A. The
integrally encapsulated frame 4050A is arranged to cover the
periphery of the photosensitive sensor 4010A and the circuit board
4070A, so as to integrally bond the integrally encapsulated frame
4050A, the filter 4020A, the photosensitive sensor 4010A, and the
circuit board 4070A. The camera lens 4030A is arranged along the
photosensitive path of the photosensitive sensor 4010A. Light
reflected from an object will pass through the camera lens 4030A
and be concentrated into the inside of the camera module, so as to
further be received by the photosensitive sensor 4010A for
photoelectric conversion, such that images corresponding to the
object can be generated.
[0748] Preferably, when the integrally encapsulated frame 4050A is
formed, it covers the periphery of the filter 4020A and the circuit
board 4070A, so as to integrate the integrally encapsulated frame
4050A, the filter 4020A, the photosensitive sensor 4010A, and the
circuit board 4070A.
[0749] More preferably, the integrally encapsulated frame 4050A
further covers the outer side edge of the protection frame 4060A,
so as to integrate the integrally encapsulated frame 4050A, the
filter 4020A, the photosensitive sensor 4010A, the circuit board
4070A, and the protection frame 4060A.
[0750] The protection frame 4060A is protrudingly arranged on the
periphery of the filter 4020A, such that when the inner surface of
the upper mold 40101A of a forming mold 40100A exerts pressure on
the protection frame 4060A, the inner surface of the upper mold
40101A is unlikely to contact the surface of the filter 4020A, so
as to avoid the inner surface of the upper mold 40101A from
damaging or scratching the filter 4020A. In other words, the
protection frame 4060A protrudingly arranged on the periphery of
the filter 4020A create a safe distance between the surface of the
filter 4020A and the inner surface of the upper mold 40101A, so as
to avoid the inner surface of the upper mold 40101A from damaging
or scratching the filter 4020A.
[0751] Further, the camera module comprises at least a camera lens
support 4040A, arranged on the top of the integrally encapsulated
frame 4050A. The camera lens 4030A is arranged on the camera lens
support 4040A, such that the camera lens 4030A can be maintained
along the photosensitive path of the photosensitive sensor 4010A by
means of the camera lens support 4040A.
[0752] According to an embodiment of the camera module of the
present invention, after the camera lens support 4040A is formed,
it will be arranged on the top of the integrally encapsulated frame
4050A. According to another embodiment of the camera module of the
present invention, the camera lens support 4040A can be integrally
formed with the integrally encapsulated frame 4050A. In this
manner, it can decrease the encapsulation deviation of the camera
module, which is helpful in enhancing the image quality of the
camera module.
[0753] Preferably, the camera lens support 4040A can be embodied to
be a motor unit. In other words, the camera lens 4030A is operably
arranged on the camera lens support 4040A, such that the camera
lens 4030A can be driven to move back and forth along the
photosensitive path of the photosensitive sensor 4010A through the
camera lens support 4040A, so as to adjust the focal length of the
camera module through alter the distance between the camera lens
4030A and the photosensitive sensor 4010A. It is worth mentioning
that the camera lens support 4040A can be various drivers to drive
the camera lens 4030A to move back and forth along the
photosensitive path of the photosensitive sensor 4010A. For
example, according to this preferred embodiment of the present
invention, the camera lens support 4040A can be embodied to be a
voice coil motor.
[0754] Person skilled in the art should be able to understand that
when the camera lens support 4040A is embodied to be a motor unit,
the camera lens support 4040A and the circuit board 4070A are
connected and communicated.
[0755] FIGS. 80A-80G illustrate perspective views of a
manufacturing method for the camera module according to the present
invention. In the step illustrated in FIG. 80A, the photosensitive
sensor 4010A is connected and communicated with the circuit board
4070A, which is similar with the above preferred embodiments of the
present invention. Nonetheless, the way to connect and communicate
the photosensitive sensor 4010A and the circuit board 4070A shall
not be limited.
[0756] In the step illustrated in FIG. 80B, the filter 4020A is
overlappedly arranged on the photosensitive sensor 4010A. Person
skilled in the art should be able to understand that the way that
the filter 4020A and the photosensitive sensor 4010A are
overlappedly arranged allows the back focal length of the camera
module to be further reduced, so as to help for miniaturize the
camera module and allow the camera module to be utilized in the
electronic devices that are expected to be more compact.
[0757] In the step illustrated in FIG. 80C, the protection frame
4060A is placed on the periphery of the filter 4020A, wherein the
protection frame 4060A will not obstruct or shade the
photosensitive area of the photosensitive sensor 4010A. Person
skilled in the art should be able to understand that after the
protection frame 4060A is provided, it may have the protection
frame 4060A be arranged on the periphery of the filter 4020A
through a gluing layer 4080A. In other words, the gluing layer
4080A being deployed between the protection frame 4060A and the
filter 4020A is for connecting and coupling the protection frame
4060A and the filter 4020A.
[0758] In the step illustrated in FIG. 80D, it utilizes the inner
surface of the upper mold 40101A to press on the protection frame
4060A so as to isolate the interior area of the filter 4020A from
the periphery. The dimensions of the interior area of the filter
4020A is larger than or equal to the photosensitive area of the
photosensitive sensor 4010A, so as to avoid the protection frame
4060A from obstructing or shading the photosensitive area of the
photosensitive sensor 4010A. Person skilled in the art should be
able to understand that the protection frame 4060A is protrudingly
arranged on the periphery of the filter 4020A, such that when the
inner surface of the upper mold 40101A exerts pressure on the
protection frame 4060A, the protection frame 4060A can prevent the
inner surface of the upper mold 40101A from contacting the
photosensitive area of the filter 4020A. Therefore, the protection
frame 4060A can avoid the inner surface of the upper mold 40101A
from damaging or scratching the interior area of the filter
4020A.
[0759] Preferably, the protection frame 4060A has resilience, such
that when the inner surface of the upper mold 40101A exert pressure
on the protection frame 4060A, the protection frame 4060A can serve
as a cushion to prevent the filter 4020A from being damaged by the
pressure brought by the upper mold 40101A.
[0760] In the step illustrated in FIG. 80E, the molding material is
added into the upper mold 40101A and forms the integrally
encapsulated frame 4050A after the molding material is solidified.
The integrally encapsulated frame 4050A covers the circuit board
4070A, the periphery of the filter 4020A, so as to integrate the
integrally encapsulated frame 4050A, the circuit board 4070A, the
photosensitive sensor 4010A, and the filter 4020A. Preferably, the
integrally encapsulated frame 4050A further covers the periphery of
the protection frame 4060A, so as to integrate the integrally
encapsulated frame 4050A, the circuit board 4070A, the protection
frame 4060A, and the photosensitive sensor 4010A, and the filter
4020A. It is worth mentioning that the molding material is a fluid
material or a granulated material. After the forming mold 40100A is
removed, an integrally encapsulated and formed unit containing the
integrally encapsulated frame 4050A, the circuit board 4070A, the
protection frame 4060A, the photosensitive sensor 4010A, and the
filter 4020A as FIG. 80F illustrated can be obtained.
[0761] Person skilled in the art should be able to understand that
the interior area of the filter 4020A is isolated from the
periphery thereof, such that after the molding material is added
into the upper mold 40101A, the molding material will not flow to
the interior area of the filter 4020A. Therefore, the protection
frame 4060A can avoid the molding material from damaging the
interior area of the filter 4020A. Besides, the protection frame
4060A is flexible, so that there will not be gap between the
protection frame 4060A and the upper mold 40101A that is pressing
the protection frame 4060A. Therefore, "burr" will not occur during
the solidification of the molding material added into the upper
mold 40101A, which guarantees the image quality of the camera
module.
[0762] In the step illustrated in FIG. 80G, the filter 4020A and
the camera lens 4030A are respectively arranged in the
photosensitive path of the photosensitive sensor 4010A, so as to
make the camera module.
[0763] Further, the present invention also provides a manufacturing
method for camera module, comprising the following steps:
[0764] (a) connecting and communicating at least a photosensitive
sensor 4010 and at least a circuit board 4070;
[0765] (b) providing at least a protection frame 4060, wherein the
protection frame 4060 is arranged on the periphery little the
photosensitive area of the photosensitive sensor 4010.
[0766] (c) pressing the protection frame 4060 with the inner
surface of the upper mold 40101 of a forming mold 40100, so as to
divide the photosensitive area and the non-photosensitive area of
the photosensitive sensor 4010.
[0767] (d) utilizing the molding material added into the forming
mold 40100 to cover the circuit board 4070 and the
non-photosensitive area of the photosensitive sensor 4010, so as to
form an integrally encapsulated frame 4050 that integrally bonds
the circuit board 4070 and the photosensitive sensor 4010 after the
molding material was solidified; and
[0768] (e) providing at least a camera lens 4030, wherein the
camera lens 4030 is arranged in the photosensitive path of the
photosensitive sensor 4010, so as to make the camera module.
[0769] Further, the present invention also provides a manufacturing
method for camera module, comprising the following steps:
[0770] (A) connecting and communicating at least a photosensitive
sensor 4010 and at least a circuit board 4070;
[0771] (B) overlapping a filter 4020 on the photosensitive
sensor;
[0772] (C) providing at least a protection frame 4060, wherein the
protection frame 4060 is arranged on the periphery of the filter
4020.
[0773] (D) pressing the protection frame 4060 with the inner
surface of the upper mold 40101 of a forming mold 40100, so as to
divide the periphery and the interior area of the filter 4020.
[0774] (E) utilizing the molding material added into the forming
mold 40100 to cover the circuit board 4070 and the periphery of the
filter 4020, so as to form an integrally encapsulated frame 4050
that integrally bonds the circuit board 4070, the photosensitive
sensor 4010, and the filter 4020 after the molding material was
solidified; and
[0775] (F) providing at least a camera lens 4030, wherein the
camera lens 4030 is arranged in the photosensitive path of the
photosensitive sensor 4010, so as to make the camera module.
[0776] FIGS. 81 to 89 illustrate a photosensitive unit and camera
module according to a preferred embodiment of the present
invention. The photosensitive unit 5010 includes a main circuit
board 5011, a photosensitive sensor 5012, and a connecting medium
5013.
[0777] The photosensitive sensor 5012 is attached on the main
circuit board 5011 through the connecting medium 5013.
[0778] The photosensitive sensor 5012 has a front side 50121 and a
back side 50122. The front side 50121 faces toward the outer side,
which is the direction opposite to the main circuit board 5011. The
front side 50121 is for conducting the photosensitive functions.
The back side 50122 faces toward the main circuit board 5011. The
connecting medium 5013 is deployed between the back side 50122 of
the photosensitive sensor 5012 and the main circuit board 5011, so
as to affix the photosensitive sensor 5012 on the main circuit
board 5011.
[0779] It is worth mentioning that the shape of the connecting
medium 5013 matches the shape of the photosensitive sensor 5012, so
as to allow the photosensitive sensor 5012 to be stably, evenly,
and flat attached on the main circuit board 5011. It is different
from the circuit board with the chip thereon through conventional
D/A attaching. According to previous description and referring to
FIGS. 81A and 81B, the circuit board 502P with the chip 501P
thereon through conventional D/A attaching usually has the
overhanging space 4P between the circuit board 2P and the chip
501P, rendering unstable bonding, poor evenness and flatness, and
high risk of tilt to the chip 501P. According to a preferred
embodiment of the present invention, the connecting medium 5013 is
evenly distributed between the photosensitive sensor 5012 and the
main circuit board 5011, so as to completely fill the space between
the back side 50122 of the photosensitive sensor 5012 and the main
circuit board 5011 with the connecting medium 5013, to increase the
covering area of the connecting medium 5013, and to avoid
overhanging spaces. Therefore, the photosensitive sensor 5012 can
be flat, levelly, and stably connected to the main circuit board
5011.
[0780] According to the present embodiment of the present
invention, specifically, the connecting medium 5013 can be selected
from the group consisting of UV tape, heat release tape, and
UV-heat release tape.
[0781] According to the present embodiment of the present
invention, the photosensitive unit 5010 includes at least a
connecting element 5014 for electrically connecting the
photosensitive sensor 5012 and the main circuit board 5011. The
connecting elements 5014 can be for, for example but not limited
to, gold wires, silver wire, copper wires, and/or aluminum wires.
In other words, the photosensitive sensor 5012 and the main circuit
board 5011 are electrically connected and communicated through the
connecting elements 5014. Thus, when the photosensitive sensor 5012
sense the light, it will convert light signal into electrical
signal and transmit the electrical signal to the main circuit board
5011 through the connecting elements 5014.
[0782] Referring to FIGS. 83-84, a first type of manufacturing
method for the photosensitive unit 5010 is illustrated. According
to this manufacturing method, when manufacturing the photosensitive
unit 5010, a layer of the connecting medium 5013 is covered on the
back side 50122 of the photosensitive sensor 5012, so as to attach
the connecting medium 5013 on the back side 50122 of the
photosensitive sensor 5012. The attaching method can be implemented
through spray coating, spin-coating, rolling brushing, printing,
and etc. The connecting medium 5013 may be selected from the group
consisting of UV tape, heat release tape, and UV-heat release
tape.
[0783] The connecting medium 5013 is semi-solidified through UV
curing or heat curing, so as to turn the connecting medium 5013
into a semi-solidified state, in order to ensure that the
connecting medium 5013 will not change easily. The UV method is the
method of UV exposure. The heat curing method is the method to
achieve curing through increasing the temperature.
[0784] It is worth mentioning that the photosensitive sensor 5012
is usually obtained through dicing a wafer 50130. Hence, in order
to conduct the dicing process, it has to attach a dicing tape 50140
on the connecting medium 5013. Then, one may dice the wafer 50130
that has the connecting medium 5013 and the dicing tape 50140
attached thereon, so as to split the wafer 50130 into a plurality
of the photosensitive sensors 5012. That is to say, it dices the
wafer 50130 to split it, so as to make the shape of the connecting
medium 5013 and the shape of the photosensitive sensor 5012
consistent.
[0785] Further, after the dicing tape 50140 is removed, the
photosensitive sensor 5012 that carries the connecting medium 5013
will be attached on the main circuit board 5011. That is, the
photosensitive sensor 5012 and the main circuit board 5011 are
connected and affixed with each other through the connecting medium
5013. Besides, the connecting medium 5013 is solidified through
pressing, heating or roasting, such that the photosensitive sensor
5012 and the main circuit board 5011 can be stably connected.
Particularly, in an embodiment of the present invention, it further
comprises a step of cleaning the photosensitive sensor 5012 before
the photosensitive sensor 5012 is attached on the main circuit
board 5011. That is to say, it is to clean the photosensitive
sensor 5012 to remove the dusts contaminated on the photosensitive
sensor 5012.
[0786] It is worth mentioning that according to another
implementation of the present invention, it may also attach the
dicing tape 50140 on the front side of the wafer 50130 during the
forming process of the photosensitive sensor 5012, so as to
facilitate dicing of the wafer 50130 into the photosensitive
sensor(s) 5012. The dicing tape 50140 is removed after the dicing
process, so as to make the photosensitive sensor 5012. In other
words, the dicing tape 50140 may be deployed on the front side or
back side of the wafer 50130. Therefore, those skilled in the art
should understand that the deployment position of the dicing tape
50140 shall not limit the present invention.
[0787] Further, the connecting elements 5014 are deployed on the
photosensitive sensor 5012 and the main circuit board 5011, such
that the photosensitive sensor 5012 and the main circuit board 5011
can be electrically connected. For example, it may utilize wire
bonding (W/B) technology conduct wire bonding on the photosensitive
sensor 5012 and the main circuit board 5011.
[0788] It is worth mentioning that, according to conventional D/A
technology, it usually has to dispense glue on the surface of the
circuit board 502P and place the chip 501P on the dispensing area.
Then, the chip 501P will be pressed to expand the glue. Therefore,
the actual shape of the glue colloid 503P is very uncertain, which,
in other words, can be distributed very uneven and difficult to
control. According to a preferred embodiment of the present
invention, the connecting medium 5013 is attached on the back side
50122 of the photosensitive sensor 5012. Moreover, the connecting
medium 5013 is evenly distributed on the back side 50122 of the
photosensitive sensor 5012 in a manner of continuum plane rather
than a discrete spots or lines, so as to ensure the flatness,
smoothness and evenness of the connection between the
photosensitive sensor 5012 and the main circuit board 5011.
Further, it is in a semi-solid state with a relatively determined
shape before the photosensitive sensor 5012 is attached on the main
circuit board 5011. Therefore, the shape of the connecting medium
5013 changes relatively little when the photosensitive sensor 5012
is attached on the main circuit board 5011 through the connecting
medium 5013, which will not affect the evenness and flatness of the
connection between the photosensitive sensor 5012 and the circuit
board much. For instance, the evenness and flatness of the
photosensitive sensor 5012 can reach the level of 2 .mu.m. Besides,
according to this preferred embodiment of the present invention,
the covering area of the connecting medium 5013 on the back side
50122 of the photosensitive sensor 5012 is increased, so as to
avoid the overhanging space 4P from occurring therearound and
reduce the risk of chip damage in the W/B process. That is to say,
it becomes easier to deploy the connecting element 5014 on the
photosensitive sensor 5012 and the main circuit board 5011.
[0789] Accordingly, the present invention provides a manufacturing
method 1000 of a photosensitive unit, comprising the following
steps:
[0790] 1100: attaching a connecting medium 5013 in a semi-solid
state on the back side 50122 of a photosensitive sensor 5012;
[0791] 1200: attaching the photosensitive sensor 5012 on a main
circuit board 5011 through the connecting medium 5013;
[0792] 1300: solidifying the connecting medium 5013, so as to flat
and stably connect the photosensitive sensor 5012 and the main
circuit board 5011; and
[0793] 1400: deploying at least a connecting element 5014 on the
photosensitive sensor 5012 and the main circuit board 5011, so as
to electrically connect the photosensitive sensor 5012 and the main
circuit board 5011.
[0794] The step 1100 can further be broken down into:
[0795] 1110: attaching the connecting medium 5013 on the back side
50122 of a wafer 50130
[0796] 1120: attaching a dicing tape 50140 on the outer side of the
connecting medium 5013
[0797] 1130: semi-solidifying the connecting medium 5013; and
[0798] 1140: dicing the wafer 50130, so as to obtain the
photosensitive sensor 5012 carrying the semi-solidified connecting
medium 5013.
[0799] The steps 1110, 1120, 1130, and 1140 are suitable for mass
producing the photosensitive unit 5010. When an independent
photosensitive sensor 5012 is provided for manufacturing the
photosensitive unit 5010, it may attach the connecting medium 5013
on the back side 50122 of the photosensitive sensor 5012 and
semi-solidify the connecting medium 5013. Then the photosensitive
sensor 5012 can be attached on the main circuit board 5011 through
the connecting medium 5013. In other words, the dicing tape 50140
and the dicing process may not be necessary. Certainly, it may also
attach a dicing tape 50140 on the front side of the wafer 50130 and
then dice the wafer 50130 in the step 1100. It can also comprise
the step of removing the dicing tape 50140 through, such as UV
exposure.
[0800] The attaching method in the step 1110 can be selected from
the group consisting of spray coating, spin-coating, rolling
brushing, and printing. The connecting medium 5013 is selected from
the group consisting of UV tape, heat release tape, and UV-heat
release tape.
[0801] The semi-solidifying process of the step 1130 can be
implemented through ultraviolet irradiation, heating, and etc.
[0802] The step 1200 further comprises a step 1210: cleaning the
photosensitive sensor 5012.
[0803] The solidification method in the step 1300 can be pressing,
heating, roasting, and etc.
[0804] The deploying method in the step 1400 is wire bonding.
[0805] It is worth mentioning that the manufacturing method for the
photosensitive unit 5010 of the present invention is suitable for
mass production. For instance, it can wholly attach the connecting
medium 5013 on the back side 50122 of the wafer 50130 and then dice
the wafer 50130, so as to obtain a plurality of the photosensitive
sensors 5012. The photosensitive sensors 5012 can then respectively
be attached on the main circuit boards 5011, so as to form a
plurality of the photosensitive units 5010 at once, which increases
the production efficiency. It is unlike conventional method that
require separate dispensing and separate bonding processes, which
is inefficient.
[0806] Referring to FIGS. 85-86, a second type of manufacturing
method for the to photosensitive unit 5010 is illustrated.
According to this manufacturing method, when manufacturing the
photosensitive unit 5010, the connecting medium 5013 is covered on
the dicing tape 50140 first, and then the connecting medium 5013
will be semi-solidified. The attaching method can be selected from
the group consisting of spray coating, spin-coating, rolling
brushing, printing, and etc. The connecting medium 5013 is selected
from the group consisting of UV tape, heat release tape, and
UV-heat release tape. Particularly, the shape of the connecting
medium 5013 is a predetermined shape, such as the shape that
matches the photosensitive sensor 5012.
[0807] The photosensitive sensor 5012 is usually obtained by dicing
the wafer 50130 in a regular production process. Therefore, it can
attach the dicing tape 50140 that has the connecting medium 5013
attached thereon on the wafer 50130 and then dice the wafer 50130,
such that independent photosensitive sensors 5012 can be obtained.
Moreover, there will also be semi-solidified connecting medium 5013
on the photosensitive sensor 5012.
[0808] In other words, it may attach the connecting medium 5013 on
the back side 50122 of the wafer 50130 with the aid of the dicing
tape 50140, so as to bond the connecting medium 5013 on the back
side 50122 of the photosensitive sensor 5012. Particularly, it can
attach the chip on the back side 50122 of the wafer 50130 through
roll extrusion.
[0809] It is worth mentioning that after the connecting medium 5013
is attached on the dicing tape 50140, it has to semi-solidify the
connecting medium 5013 through, for example, UV curing or heat
curing, so as to turn the connecting medium 5013 into a
semi-solidified state in order to ensure that the connecting medium
5013 will not change easily. The UV method is the method of UV
exposure. The heat curing method is the method to achieve curing
through increasing the temperature.
[0810] Further, the photosensitive sensor 5012 that carries the
connecting medium 5013 is attached on the main circuit board 5011.
That is, the photosensitive sensor 5012 and the main circuit board
5011 are connected and affixed with each other through the
connecting medium 5013. Besides, the connecting medium 5013 is
solidified through pressing, heating or roasting, such that the
photosensitive sensor 5012 and the main circuit board 5011 can be
stably connected. Particularly, in an embodiment of the present
invention, it further comprises a step of cleaning the
photosensitive sensor 5012 before the photosensitive sensor 5012 is
attached on the main circuit board 5011. That is to say, it is to
remove the dusts contaminated on the photosensitive sensor
5012.
[0811] Further, the connecting elements 5014 are deployed on the
photosensitive sensor 5012 and the main circuit board 5011, such
that the photosensitive sensor 5012 and the main circuit board 5011
can be electrically connected.
[0812] Accordingly, the present invention provides a manufacturing
method 2000 of a photosensitive unit, comprising the following
steps:
[0813] 2100: attaching a connecting medium 5013 in a semi-solid
state on the back side 50122 of a photosensitive sensor 5012;
[0814] 2200: attaching the photosensitive sensor 5012 on a main
circuit board 5011 through the connecting medium 5013;
[0815] 2300: solidifying the connecting medium 5013, so as to flat
and stably connect the photosensitive sensor 5012 and the main
circuit board 5011; and
[0816] 2400: deploying at least a connecting element 5014 on the
photosensitive sensor 5012 and the main circuit board 5011, so as
to electrically connect the photosensitive sensor 5012 and the main
circuit board 5011.
[0817] The step 2100 can further be broken down into:
[0818] 2110: attaching the connecting medium 5013 on a dicing tape
50140;
[0819] 2120: semi-solidifying the connecting medium 5013; and
[0820] 2130: attaching the connecting medium 5013 on a wafer 50130;
and
[0821] 2140: dicing the wafer, so as to obtain the photosensitive
sensor 5012 carrying the semi-solidified connecting medium
5013.
[0822] The steps 2110, 2120, 2130, and 2140 are suitable for mass
production of the photosensitive unit 5010.
[0823] The attaching method in the step 2110 can be selected from
the group consisting of spray coating, spin-coating, rolling
brushing, and printing. The attaching method in the step 2120 can
be roll extrusion.
[0824] The connecting medium 5013 is selected from the group
consisting of UV tape, heat release tape, and UV-heat release
tape.
[0825] The semi-solidifying process of the step 2120 can be
implemented through ultraviolet irradiation, heating, and etc.
[0826] The step 2200 further comprises a step of: cleaning the
photosensitive sensor 5012.
[0827] The solidification method in the step 2300 can be pressing,
heating, roasting, and etc.
[0828] The deploying method in the step 2400 is wire bonding.
[0829] Referring to FIGS. 87A-88, a third type of manufacturing
method for the photosensitive unit 5010 is illustrated. According
to this manufacturing method, when manufacturing the photosensitive
unit 5010, the connecting medium 5013 is covered on the main
circuit board 5011 first, so as to create available connection site
on the main circuit board 5011.
[0830] According to the present embodiment of the present
invention, the connecting medium 5013 is semi-solidified through,
for example, UV curing or heat curing, so as to turn the connecting
medium 5013 into a semi-solidified state, in order to ensure that
the connecting medium 5013 will not change easily. The UV method is
the method of UV exposure. The heat curing method is the method to
achieve curing through increasing the temperature.
[0831] In other embodiment of the present invention, the
semi-solidifying process can be skipped. That is to say, the
semi-solidifying process is not a required step for those
methods.
[0832] Next, the photosensitive sensor 5012 is attached on the main
circuit board 5011. Then the connecting medium 5013 is solidified,
so as to make the stable and flat photosensitive unit 5010. The
connecting medium 5013 may be selected from the group consisting of
UV tape, heat release tape, and UV-heat release tape.
[0833] It is worth mentioning that the attaching method of the
connecting medium 5013 in this manufacturing process may be
selected from spray coating, frictioning, scratch brushing,
printing, and etc., so as to form a layer of evenly distributed
membrane with a certain thickness on the main circuit board 5011 at
the position corresponding to the photosensitive sensor 5012, so as
to serve as a bonding agent of D/A paster. Then the connecting
medium 5013 will be semi-solidified. Next, the photosensitive
sensor 5012 will be attached on the main circuit board 5011 and
pressed, heated and presses or roasted, so as to stably and
reliably connect the photosensitive sensor 5012 and the main
circuit board 5011. Unlike traditional dispensing and bonding
processes, the present method increases the covering area of the
connecting medium 5013, so as to avoid overhanging spaces between
the photosensitive sensor 5012 and the main circuit board 5011 and
enhance the flatness, evenness, and smoothness. In addition, before
the photosensitive sensor 5012 is attached on the main circuit
board 5011, the connecting medium 5013 is semi-solidified, such
that the shape of the connecting medium 5013 becomes relatively
stable and will not change easily. Therefore, the shape of the
connecting medium 5013 will not change much when the photosensitive
sensor 5012 is attached on the main circuit board 5011 and when it
subsequently goes through the process like pressing, heating and
pressing, roasting, and etc., such that the evenness and flatness
of the connection between the photosensitive sensor 5012 and the
main circuit board 5011 can be ensured.
[0834] Further, the connecting elements 5014 are deployed on the
photosensitive sensor 5012 and the main circuit board 5011, such
that the photosensitive sensor 5012 and the main circuit board 5011
can be electrically connected. For example, it may utilize wire
bonding (W/B) technology conduct wire bonding on the photosensitive
sensor 5012 and the main circuit board 5011.
[0835] Referring to FIG. 87B, the fourth type of manufacturing
method for a photosensitive unit according to a preferred
embodiment of the present invention is illustrated. According to
this manufacturing method, when manufacturing the photosensitive
unit 5010, the connecting medium 5013 is covered on the main
circuit board 5011 first, so as to create available connection site
on the main circuit board 5011. The differences between the above
three manufacturing processes include that in this manufacturing
process, the connecting medium 5013 is attached on the main circuit
board 5011 through adhering. For example, a double side adhesive
film with a predetermined shape can be attached on the surface of
the main circuit board 5011. The shape of the film matches the
shape of the photosensitive sensor 5012, so and to allow the
photosensitive sensor 5012 to be evenly, flat, and gaplessly
attached on the main circuit board 5011.
[0836] Further, according to another embodiment, after the
connecting medium 5013 is attached, the connecting medium 5013 can
be pre-solidified through UV irradiation. Next, the photosensitive
sensor 5012 is attached on the connecting medium 5013. Then the
connecting medium 5013 is solidified through heating, so as to
stably connect and fasten the photosensitive sensor 5012 and the
main circuit board 5011. In other words, in this implementation,
the connecting medium 5013 may utilize material(s) without UV
solidification characteristic for adhering.
[0837] According to another embodiment, after the connecting medium
5013 is attached, the connecting medium 5013 will not be
pre-solidified by UV irradiation. Instead, the photosensitive
sensor 5012 is directly attached on the connecting medium 5013 and
then the connecting medium 5013 is solidified through heating, so
as to stably connect and after fasten the photosensitive sensor
5012 and the main circuit board 5011. In other words, in this
implementation, the connecting medium 5013 may utilize material(s)
without UV solidification characteristic for adhering.
[0838] Correspondingly, according to the above two manufacturing
processes of the present invention, the present invention provides
a manufacturing method 3000 of a photosensitive unit 5010,
comprising the following steps:
[0839] 3100: attaching a connecting medium 5013 of a predetermined
shape on a main circuit board 5011;
[0840] 3200: attaching the photosensitive sensor 5012 on a main
circuit board 5011 through the connecting medium 5013;
[0841] 3300: solidifying the connecting medium 5013, so as to flat
and stably connect the photosensitive sensor 5012 and the main
circuit board 5011; and
[0842] 3400: deploying at least a connecting element 5014 on the
photosensitive sensor 5012 and the main circuit board 5011, so as
to electrically connect the photosensitive sensor 5012 and the main
circuit board 5011.
[0843] The step 3100 can further be broken down into:
[0844] 3110: attaching the connecting medium 5013 on the main
circuit board 5011; and
[0845] 3120: semi-solidifying the connecting medium 5013; and
[0846] The attaching method in the step 3110 can be selected from
the group consisting of spray coating, frictioning, scratch
brushing, printing, and attaching. The connecting medium 5013 is
selected from the group consisting of UV tape, heat release tape,
and UV-heat release tape. Also, its predetermined shape matches the
shape of the photosensitive sensor 5012, such that the
photosensitive sensor 5012 can be attached on the main circuit
board 5011 in an even and flat manner without creating an
overhanging space 504P. In addition, the semi-solidifying process
helps to make the shape of the connecting medium 5013 relatively
fixed and not likely to change. It is worth mentioning that the
semi-solidifying process is an optional step. Namely, according to
other embodiments, it may directly coat the connecting medium 5013
corresponding to the photosensitive sensor 5012 and conduct the
attaching.
[0847] The solidification method in the step 3300 can be pressing,
heating, roasting, and etc.
[0848] The deploying method in the step 3400 is wire bonding.
[0849] Referring to FIG. 89, the camera module according to a
preferred embodiment of the present invention is illustrated. The
camera module includes one the photosensitive unit 5010, a frame
5050, an optical filter 5020, a camera lens 5030, and a motor unit
5040. The frame 5050 is mounted on the photosensitive unit 5010.
The optical filter 5020 is installed on the frame 5050 and in the
photosensitive path of the photosensitive sensor 5012. The camera
lens 5030 is installed on the motor unit 5040, such that the focal
length of the camera module can be adjusted through the motor unit
5040. The motor unit 5040 is installed on the frame 5050, so as to
have the camera lens 5030 be positioned along the photosensitive
path of the sensor 5050.
[0850] It is worth mentioning that the utilization of the
photosensitive unit 5010 on the camera module provides the
photosensitive sensor 5012 more flattening and smoothness, so that
the consistency of the photosensitive axes of the photosensitive
sensor 5012, optical filter 5020, and the camera lens 5030 can be
adjusted more easily, which improves the imaging quality of the
camera module and solves the issues of poor resolution, abnormal
image curve, error code of the motor unit 5040, and etc. occurring
in the test procedure of the camera module.
[0851] It is worth mentioning that, in the present embodiment of
the present invention, it utilizes an automatic focus camera module
as an example for the description, whereas in other embodiments of
the present invention, the camera module can also be a fixed focus
module, that is, without the motor unit 5040. Person skilled in the
art should understand that the specific shape, type, and mounting
of the camera module should not limit the present invention.
[0852] FIGS. 90 and 91 illustrate a photosensitive unit 5010 and
camera module according to another preferred embodiment of the
present invention. The differences between this preferred
embodiment and the above preferred embodiments include that the
photosensitive unit 5010 comprises a molding body 5015. The molding
body 5015 is integrally formed on the main circuit board 5011 and
the photosensitive sensor 5012.
[0853] It is worth mentioning that according to conventional D/A
technology the overhanging space usually occur in the fringe area
that the chip and the circuit board are connected. Therefore, it
has to utilize the mold to press the fringe of the chip when it is
molding to form the molding body 5015 after the D/A process.
Nonetheless, because of the existence of the overhanging space, it
can cause the photosensitive sensor 5012 tilted or damaged easily,
which is disadvantageous for forming the molding body 5015 and for
assembling the camera module. According to the present embodiment
of the present invention, the photosensitive sensor 5012 is flat
and evenly connected with the main circuit board 5011 through the
connecting medium 5013 without leaving the overhanging space, such
that it is easier to form the molding body 5015 and it can keeps
the molding body 5015 flat and even.
[0854] Referring to FIG. 91, a camera module utilizing the
photosensitive unit according to the present embodiment of the
present invention is illustrated. The camera module comprises a
photosensitive unit 5010, an optical filter 5020, a camera lens
5030, and a motor unit 5040.
[0855] The optical filter 5020 is mounted on the molding body 5015
of the photosensitive unit 5010 in the photosensitive path of the
photosensitive sensor 5012. The camera lens 5030 is installed on
the motor unit 5040, such that the focal length of the camera
module can be adjusted through the motor unit 5040. The motor unit
5040 is installed on the molding body 5015, so as to have the
camera lens 5030 be positioned along the photosensitive path of the
photosensitive sensor 5050.
[0856] It is worth mentioning that the utilization of the
photosensitive unit 5010 on the camera module provides both the
photosensitive sensor 5012 and the molding body 5015 more
flattening and smoothness, so that the consistency of the
photosensitive axes of the photosensitive sensor 5012, optical
filter 5020, and the camera lens 5030 can be adjusted more easily,
which solves the problem of chip tilt rendered in forming of the
molding body 5015, so as to improve the imaging quality of the
camera module and solves the issues of poor resolution, abnormal
image curve, error code of the motor unit, and etc. occurring in
the test procedure of the camera module. Hence, the photosensitive
unit 5010 of the present invention is especially suitable is for
the camera modules being made by molding technology.
[0857] The photosensitive unit 5010 comprises at least a circuit
element 5016 protruded from the main circuit board 5011 and
encapsulated and wrapped up by the molding body 5015.
[0858] The molding body 5015 is integrally encapsulated on the
non-photosensitive area of the front side 50121 of the
photosensitive sensor 5012, so as to reinforce and strengthen the
connection between the photosensitive sensor 5012 and the main
circuit board 5011.
[0859] It is worth mentioning that, in the present embodiment of
the present invention, it utilizes an automatic focus camera module
(AFM) as an example for the description, whereas in other
embodiments of the present invention, the camera module can also be
a fixed focus module (FFM), that is, without the motor unit 5040.
Person skilled in the art should understand that the specific
shape, type, and mounting of the camera module should not limit the
present invention.
[0860] Those skilled in the art shall understand that the above
mentioned embodiments of the present invention in the descriptions
and figures are to give examples, but to confine the present
invention. Objectives of the present invention are completely and
effectively implemented. Notions of the functions and structures of
the present invention have been shown and described in the
embodiments, whereas implementations of the present invention may
have modifications or changes in any ways without going against the
above notions.
[0861] One skilled in the art will understand that the embodiment
of the present invention as shown in the drawings and described
above is exemplary only and not intended to be limiting.
[0862] It will thus be seen that the objects of the present
invention have been fully and effectively accomplished. The
embodiments have been shown and described for the purposes of
illustrating the functional and structural principles of the
present invention and is subject to change without departure from
such principles. Therefore, this invention includes all
modifications encompassed within the spirit and scope of the
following claims.
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