Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8723219 | Chamfered freestanding nitride semiconductor wafer and method of chamfering nitride semiconductor wafer | Masahiro Nakayama | 2014-05-13 |
| 8482032 | Chamfered freestanding nitride semiconductor wafer and method of chamfering nitride semiconductor wafer | Masahiro Nakayama | 2013-07-09 |
| 8283694 | GaN substrate, epitaxial layer-provided substrate, methods of manufacturing the same, and method of manufacturing semiconductor device | Keiji Ishibashi, Akihiro Hachigo, Seiji Nakahata | 2012-10-09 |
| 8101968 | Group III nitride substrate, epitaxial layer-provided substrate, methods of manufacturing the same, and method of manufacturing semiconductor device | Keiji Ishibashi, Akihiro Hachigo, Seiji Nakahata | 2012-01-24 |
| 8022438 | Chamfered freestanding nitride semiconductor wafer and method of chamfering nitride semiconductor wafer | Masahiro Nakayama | 2011-09-20 |
| 7919343 | Group III nitride crystal and method for surface treatment thereof, group III nitride stack and manufacturing method thereof, and group III nitride semiconductor device and manufacturing method thereof | Keiji Ishibashi, Naoki Matsumoto | 2011-04-05 |
| 7901960 | Group III nitride substrate, epitaxial layer-provided substrate, methods of manufacturing the same, and method of manufacturing semiconductor device | Keiji Ishibashi, Akihiro Hachigo, Seiji Nakahata | 2011-03-08 |
| 7851381 | Surface treatment method for nitride crystal, nitride crystal substrate, nitride crystal substrate with epitaxial layer and semiconductor device, and method of manufacturing nitride crystal substrate with epitaxial layer and semiconductor device | Keiji Ishibashi, Takayuki Nishiura, Seiji Nakahata | 2010-12-14 |
| 7662239 | Method of producing group 3 nitride substrate wafers and group 3 nitride substrate wafers | Keiji Ishibashi, Seiji Nakahata | 2010-02-16 |
| 7550780 | Chamfered freestanding nitride semiconductor wafer and method of chamfering nitride semiconductor wafer | Masahiro Nakayama | 2009-06-23 |
| 7390747 | Nitride semiconductor substrate and method of producing same | Yasushi Mochida, Masahiro Nakayama | 2008-06-24 |
| 7195545 | Chamfered freestanding nitride semiconductor wafer and method of chamfering nitride semiconductor wafer | Masahiro Nakayama | 2007-03-27 |
| 7154131 | Nitride semiconductor substrate and method of producing same | Yasushi Mochida, Masahiro Nakayama | 2006-12-26 |