RYU; Choong Han
Patent Applications and Registrations
Patent applications and USPTO patent grants for RYU; Choong Han.The latest application filed is for "methods of fabricating phase shift photomasks".
- RYU; Choong Han - Cheongju-si Chungcheongbuk-do KR
- Ryu; Choong Han - Chungcheongbuk-do KR
- Ryu; Choong Han - Seoul KR
| Patent | Date |
|---|---|
| Methods Of Fabricating Phase Shift Photomasks App 20220121106 - RYU; Choong Han ; et al. | 2022-04-21 |
| Blank Phase Shift Photomasks, Phase Shift Photomasks Fabricated Using Blank Phase Shift Photomasks, And Methods Of Fabricating P App 20190354004 - RYU; Choong Han ; et al. | 2019-11-21 |
| Method of fabricating reflective photomask Grant 9,726,970 - Ryu August 8, 2 | 2017-08-08 |
| Method Of Fabricating Reflective Photomask App 20170123304 - RYU; Choong Han | 2017-05-04 |
| Reflection-type photomasks and methods of fabricating the same Grant 8,795,931 - Ryu , et al. August 5, 2 | 2014-08-05 |
| Reflection-type Photomasks And Methods Of Fabricating The Same App 20130196256 - RYU; Choong Han ; et al. | 2013-08-01 |
| Method for correcting critical dimension of phase shift mask and method for manufacturing the same Grant 8,455,159 - Ryu June 4, 2 | 2013-06-04 |
| Method For Correcting Critical Dimension Of Phase Shift Mask And Method For Manufacturing The Same App 20120061349 - RYU; Choong Han | 2012-03-15 |
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