U.S. patent application number 11/296141 was filed with the patent office on 2007-05-03 for frame packaged array electronic component.
This patent application is currently assigned to Vishay Vitramon Inc.. Invention is credited to John Bultitude.
Application Number | 20070096345 11/296141 |
Document ID | / |
Family ID | 37607327 |
Filed Date | 2007-05-03 |
United States Patent
Application |
20070096345 |
Kind Code |
A1 |
Bultitude; John |
May 3, 2007 |
Frame packaged array electronic component
Abstract
The present invention uses a frame with one or more axial ribs
extending from a spine onto which two or more discrete two-terminal
electronic components, such as capacitors, resistors, or inductors,
can be attached. The function of the frame is to align and space
the electronic components in a single device or array that allows
the two-terminals of each component to be separately contacted or
soldered to a PC board during final assembly into a circuit. The
frame may use friction or a bonding agent to hold the components to
the frame. Additionally, the base of the frame forms a single
surface for the pick and place equipment used in circuit board
assembly. The frame and any bonding agent must be capable of
sustaining high temperature soldering operations to form electrical
contacts in the circuit assembly operation.
Inventors: |
Bultitude; John; (Monroe,
CT) |
Correspondence
Address: |
MCKEE, VOORHEES & SEASE, P.L.C.
801 GRAND AVENUE
SUITE 3200
DES MOINES
IA
50309-2721
US
|
Assignee: |
Vishay Vitramon Inc.
Monroe
CT
|
Family ID: |
37607327 |
Appl. No.: |
11/296141 |
Filed: |
December 7, 2005 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
|
60733275 |
Nov 3, 2005 |
|
|
|
Current U.S.
Class: |
257/787 |
Current CPC
Class: |
H05K 2201/10606
20130101; H05K 3/301 20130101; Y10T 29/4913 20150115; H05K
2201/10522 20130101; Y10T 29/49128 20150115; Y10T 29/49126
20150115; Y10T 29/49004 20150115; H05K 3/303 20130101; Y10T
29/49121 20150115; Y02P 70/50 20151101; H05K 2201/10636 20130101;
Y10T 29/49165 20150115 |
Class at
Publication: |
257/787 |
International
Class: |
H01L 23/28 20060101
H01L023/28 |
Claims
1. A frame packaged array device for holding a plurality of
electronic components comprising: an elongated spine; and one or
more ribs protruding axially from one side of the spine allowing
the plurality of components to locate adjacent the spine and
adjacent the one or more ribs for attaching the components to a
circuit board.
2. The array device of claim 1 constructed from plastic.
3. The array device of claim 1 configured for holding surface mount
electronic devices.
4. The array device of claim 1 configured to frictionally hold the
components.
5. A frame packaged array device for holding a plurality of
electronic components comprising: an array frame having an
elongated spine and one or more ribs protruding axially from the
spine; and a plurality of electronic components attached to the
array frame and located adjacent the spine and adjacent the one or
more ribs for attaching the components to a circuit board.
6. The array device of claim 5 wherein the plurality of electronic
components are selected from the group consisting of capacitors,
resistors and inductors.
7. The array device of claim 5 having a bonding agent for attaching
the electronic components to the array frame.
8. A frame packaged array device for holding a plurality of
electronic components comprising: an electronic device array having
an array frame with a spine, one or more ribs protruding axially
from the spine, and a plurality of electronic components attached
to the array frame and located adjacent the spine and adjacent the
one or more ribs; a printed circuit board; and one or more of the
electronic components electrically connected to the circuit
board.
9. The array device of claim 8 wherein the electronic components
are surface mounted devices.
10. A method of making a frame packaged array device for holding a
plurality of electronic components comprising: selecting electronic
components to include in the array device; and attaching the
electronic components to an array frame, where the array frame has
an elongated spine and one or more ribs protruding axially from one
side of the spine so that the electronic components can be
electrically connected to a printed circuit board.
11. The method of claim 10 further comprising testing the
electronic components.
12. The method of claim 10 further comprising applying a bonding
agent to hold the electronic components in place on the array
frame.
13. The method of claim 10 further comprising arranging and
packaging the array assembly for automated placement onto circuit
boards.
14. The method of claim 10 further comprising electrically
attaching the electronic components to the printed circuit board.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority under 35 U.S.C. .sctn.119
of a provisional application Ser. No. 60/733,275 filed Nov. 3,
2005, which application is hereby incorporated by reference in its
entirety.
BACKGROUND OF THE INVENTION
[0002] The present invention relates to component array packaging.
Specifically, the present invention relates to a frame packaged
array electronic or optical component and method of making.
[0003] The present invention will be shown and described for use
with electronics, however, it can also be used with optic
devices.
[0004] As electronic devices, such as cardiac care devices,
continue to increase in functionality while the device sizes are
reduced, reductions in circuit board real estate is desired. Low
voltage multi-layer ceramic capacitors are currently used
extensively in medical and other electronic equipment for filtering
applications. Miniaturization of the components for some filter
designs require two or more capacitors with very closely matched
capacitance. For this reason, arrays containing two or more matched
capacitors that can be placed on a printed circuit or PC board in a
single operation have been used.
[0005] Capacitor arrays having two or more capacitors within a
single monolithic multilayer ceramic component are available. The
capacitors within such components have terminations that connect to
separate sets of interleaved inner electrodes within the device.
When these components are placed in a circuit board, the single
array behaves like two or more individual multi-layer ceramic
capacitors placed side by side. Other electronic devices have
similar types of arrays.
[0006] Arrays have the advantages of replacing two or more standard
multilayer capacitors with one component that can be placed on a PC
board in a single operation, rather than one operation for each
part. In addition, the area required on a PC board for an array is
less than that for individual multilayer ceramic capacitors. This
is an advantage for applications where space is at a premium.
[0007] As technology advances and there is a requirement to reduce
the size of the array, there is a serious disadvantage to this
approach. As the proximity of the electrodes of two or more
capacitors within an array get closer together as the part size is
reduced, the electric fields in the two separate capacitors can
interact through the mutual ceramic interface resulting in
crosstalk detrimental to the performance of the circuit.
Additionally, it is not easy to test the individual capacitors
within the array without developing special test equipment. Another
problem with this type of array is that since this is a single
monolith, the array is restricted to one ceramic dielectric type.
Furthermore, if one capacitor in the array is defective, the entire
array is defective.
[0008] U.S. Pat. No. 6,058,004 discloses a method of epoxy bonding
two or more multilayer ceramic capacitors together with a resistor
or inductor into a single component. In this way there is no single
material forming a direct link between the electrodes of the
capacitors or other components so crosstalk is minimized. This
method has the advantage that the individual standard type
components can be tested prior to assembly of the array and unlike
the monolithic approach, the arrays can be formed with components
of widely different materials and sizes. Arrays of multi-layer
ceramic capacitors small as 0603 case size
(length=0.063.+-.0.005''; width=0.031.+-.0.005'') have been used to
form Epoxy Bonded Arrays in this way. However, there are also
significant limitations to this approach with respect to further
size reductions to realize further area reductions in circuit
designs, specifically it is difficult to maintain the spacing
tolerances and alignment of the capacitors during the placement
operation. Therefore, it is desirable to have an improved frame
packaged array electronic component which can accommodate smaller
electronic components.
[0009] In view of the foregoing, it is a primary feature or
advantage of the present invention to provide an improved frame
packaged array electronic component.
[0010] Another feature or advantage of the present invention is a
reduced size electronic component array, in terms of smaller
surface area, and/or lower head room.
[0011] Another feature or advantage of the present invention is an
electronic component array system which can be tested using
traditional testing methods for the electronic components.
[0012] Another feature or advantage of the present invention is an
electronic array having multiple electronic components which can be
placed on a circuit board in a single action.
[0013] Another feature or advantage of the present invention is an
electronic component array device which can withstand the high
temperatures of surface mounting electronic components to a circuit
board.
[0014] Another feature or advantage of the present invention is an
electronic frame packaged array device which can form an
electronics array using different types of electronics components
in the same array.
[0015] Another feature or advantage of the present invention is an
electronics array device which allows for uniform or controlled
spacing between electronics components in the array.
[0016] A further feature or advantage of the present invention is
an electronics array device which gives rigidity to multiple
electronics components contained within the array.
[0017] A further feature or advantage of the present invention is
the provision of a frame packaged array electronic component which
is economical to manufacture, durable in use, and efficient in
operation.
[0018] A still further feature or advantage or advantage of the
present invention is a frame packaged array electronic component
method of manufacturing and assembling the electronic component
array.
[0019] One or more of these and/or other objects, features or
advantages of the invention will be apparent from the specification
and claims that follow.
BRIEF SUMMARY OF THE INVENTION
[0020] One or more of the foregoing features or advantages may be
achieved by an array frame for holding a plurality of electronic
components as an array having a spine and one or more ribs
extending axially from the spine allowing the plurality of
components to locate on the spine adjacent the one or more ribs,
wherein the components form a plane for attaching the components to
a relatively planar circuit board.
[0021] Another aspect of the present invention is an array frame
for holding a plurality of electronic components as an array which
is constructed from plastic.
[0022] One or more of the foregoing features or advantages may also
be achieved by an electronic device array having an array frame
with a spine and one or more ribs protruding axially from the spine
and a plurality of electronic components attached to the spine
adjacent the one or more ribs, where the components form a plane
for attaching the components to a relatively planar circuit board.
The electronic components may be capacitors, resistors, conductors,
or other electronic devices.
[0023] One or more of the foregoing features or advantages may also
be achieved by an electronic circuit having a printed circuit
board, an electronic device array with an array frame which has a
spine and one or more ribs protruding axially from the spine, and a
plurality of electronic components attached to the spine adjacent
the one or more ribs where the components form a plane for
attaching the components to a relatively planar circuit board and
one or more of the electronic components are electrically connected
to the circuit board. The components are preferably surface mounted
devices.
[0024] One or more of the foregoing features or advantages may also
be achieved by a method of making an electronic package array
assembly device by selecting electronic components to include in
the array assembly and attaching the electronic components to an
array frame so that the electronic components can be electrically
connected to a printed circuit board. Other aspects of the
invention may include testing the electronic components, applying a
bonding agent to hold the electronic components in place on the
array frame, or arranging and packaging the array assembly for
automated placement onto circuit boards.
[0025] The term array, as used in this application, refers to a
plurality of electronic devices, such as two capacitors, being
coupled together in a single device for placement on a circuit
board. In this way, the operation of placing parts on the circuit
board can put the multiple part array onto the circuit board in a
single operation. This is desirable as a time saving element and
also in situations where the electronic components are desired to
be matched or specific in tolerances. In this case, the electronic
components can be matched before assembled into the array. The
array of the present invention can hold any number of electronic
devices and the electronic devices can be any type and style of
electronic devices, such as, but not limited to, surface mount or
through hole mount, resistors, capacitors, inductors, or other
electronic devices.
BRIEF DESCRIPTION OF THE FIGURES AND DRAWINGS
[0026] FIG. 1 is an isometric view of one embodiment of the frame
packaged array electronic component.
[0027] FIG. 2 is an end view of FIG. 1.
[0028] FIG. 3 is a front view of FIG. 1.
[0029] FIG. 4 is a side view of FIG. 1.
[0030] FIG. 5 is one embodiment of an electronic circuit using the
electronic component array system of the present invention.
[0031] FIG. 6 is an exemplary soldering profile for using an
electronic component array system of the present invention for
attaching the electronic components to a printed circuit board.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0032] FIGS. 1-4 show one embodiment of a frame packaged array
assembly 10. The frame packaged array assembly 10 can be
constructed to hold any number of electronic components 12. The
electronic components 12 are preferably surface mount resistors,
inductors, or capacitors. However, any type of electronic component
12 can be used with the present invention.
[0033] The array frame 20 for holding the frame packaged array
assembly 10 together as shown, has a spine 22 and ribs 24. The ribs
24 extend axially from the spine 22 and allow for spacing between
electronic components 12, to keep the electronic components 12
separated from one another on the frame packaged array assembly 10.
As the electronic components 12 are located on the array frame 20
there may or may not be a gap 26 between the ribs 24 and the
electronic components 12. The electronic components 12 may be held
to the array frame 20 as a friction fit, or may be held with a
bonding agent. This allows the electronic components 12 to attach
to the array frame 20 until the array assembly 10 is placed onto a
printed circuit board 40 as shown in FIG. 5.
[0034] The frame packaged array assembly 10 is configured so that
the terminals 14 on the electronic component 12 can be soldered to
traces 42 on the printed circuit board 40. Preferably, the ribs 24
do not extend far enough out from the spine 22 to interfere with
the terminals 14 of the electronic components 12 contacting the
traces 42 on the printed circuit board 40 when the frame packaged
array assembly 10 is located on the printed circuit board 40. In
other words, the ribs 24 should be shorter than the width of the
electronic component 12 plus any distance which the terminal 14
extends past the width of the electronic component 12.
[0035] It is noted that the frame packaged array assembly 10 can be
used with any size, number, and type of electronic component 12. In
addition, the frame packaged array assembly 10 can be used with any
type of circuit on a printed circuit board 40 which requires
multiple electronic components 12. The electronic components 12 can
be tested before installation onto the array frame 20, which will
allow for matched components on the array assembly 10.
[0036] A sample soldering process IR reflow profile is given in
FIG. 6 which can be used for soldering the electronic components 12
to the traces 42 of the printed circuit board 40. Other IR reflow
profiles can be used with the present invention.
[0037] The array frame 20 is preferably made of a plastic material
which does not shrink or warp or otherwise become defective during
the heating and soldering process. The preferred plastic material
to make the array frame 20 is a liquid crystal polymer. However
other types of materials can be used to make the array frame
20.
[0038] In summary, the present invention is essentially a molded
plastic frame 20 into which two or more discrete two-terminal 14
electronic components 12, such as capacitors, resistors, or
inductors, can be packaged. The function of the plastic frame 20 is
to align and space the electronic components 12 in a single device
or array 10 that allows the two-terminals 14 of each component to
be separately contacted or soldered to the PC board during final
assembly into a circuit. The frame 20 may be made to hold the
components 12 in place by friction or a bonding agent may be used.
Additionally, the spine 22 of the frame 20 forms a single surface
for the pick and place equipment used in circuit board
assembly.
[0039] The material used in the frame 20 must be capable of being
molded to tight tolerances and be able to sustain high temperature
soldering operations to form electrical contacts in the circuit
assembly operation after placement. If a bonding agent is used to
bond the components 12 within the frame 20, the bonding agent must
also be capable of surviving the soldering operation.
[0040] An exemplary frame packaged array assembly 10 is described
in the following example:
[0041] The frame packaged array assembly 10 is best shown in FIGS.
1-5. The array frame 20 was constructed using liquid crystal
polymer plastic. The array frame 20 was developed to allow, in this
example, four 0402 capacitors (length=0.04.+-.0.004'';
width=0.020.+-.0.004''). In this example, a bonding agent epoxy
mount compound was used to hold the capacitors to the frame 20 by
applying the epoxy prior to placing the parts in the frame 20 and
curing the epoxy at 125.degree. C. for 15 minutes. This example was
successfully soldered to a circuit board using the solder profile
shown in FIG. 6 with no distortion or cracking of the frame 20 or
damage to the capacitors.
[0042] In this example, the four capacitors are assembled onto a
single component within a maximum area of 0.0052 square inches
(0.118''.times.0.044''). This can be compared to a typical 0612
array made by bonding four 0603 capacitors or within a single
component within an area of no less than 0.0072 square inches. The
frame packaged array assembly 10 reduces the area required by over
25% while maintaining the advantages of no crosstalk from bonding
individual multilayer ceramic capacitors together. In addition, the
spine 22 of the frame 20 provides a single flat surface to pick and
place the assembled part onto a printed circuit board. The array
assembly 10 can then be soldered to the printed circuit board, such
as 40 in FIG. 5 using a process profile as shown in FIG. 6.
[0043] The invention has been shown and described above with the
preferred embodiments, and it is understood that many
modifications, substitutions, and additions may be made which are
within the intended spirit and scope of the invention. From the
foregoing, it can be seen that the present invention accomplishes
at least all of its stated objectives.
* * * * *