Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8728870 | Thin film silicon wafer and method for manufacturing the same | Satoshi Tobe | 2014-05-20 |
| 5739553 | Algainp light-emitting device | Nobuhiko Noto, Keizo Adomi | 1998-04-14 |
| 5612539 | Method of evaluating lifetime related quality of semiconductor surface | Ryoji Hoshi, Yutaka Kitagawara | 1997-03-18 |
| 5600158 | Semiconductor light emitting device with current spreading layer | Nobuhiko Noto, Keizo Adomi | 1997-02-04 |
| 5598452 | Method of evaluating a silicon single crystal | Hiroshi Takeno, Ryoji Hoshi, Satoshi Ushio | 1997-01-28 |
| 5597761 | Semiconductor light emitting device and methods of manufacturing it | Keizo Adomi, Nobuhiko Noto, Akio Nakamura | 1997-01-28 |
| 5585305 | Method for fabricating a semiconductor device | Masato Yamada | 1996-12-17 |
| 5533387 | Method of evaluating silicon wafers | Ken Aihara, Yutaka Kitagawara | 1996-07-09 |
| 5444269 | AlGaInP light emitting device | Keizo Adomi, Nobuhiko Noto | 1995-08-22 |
| 5442201 | Semiconductor light emitting device with nitrogen doping | Keizo Adomi, Nobuhiko Noto, Akio Nakamura | 1995-08-15 |
| 5442203 | Semiconductor light emitting device having AlGaAsP light reflecting layers | Keizo Adomi, Nobuhiko Noto | 1995-08-15 |
| 5401684 | Method of manufacturing a light-emitting semiconductor device substrate | Masato Yamada, Shinji Orimo | 1995-03-28 |
| 5386118 | Method and apparatus for determination of interstitial oxygen concentration in silicon single crystal | Yutaka Kitagawara, Hiroshi Kubota, Masaro Tamatsuka, Kazuhisa Takamizawa | 1995-01-31 |
| 5366552 | Apparatus for liquid-phase epitaxial growth | Masato Yamada, Masahisa Endo | 1994-11-22 |
| 5362683 | Method of making epitaxial wafers | Masahisa Endo, Masato Yamada | 1994-11-08 |
| 5323027 | Light emitting device with double heterostructure | Masato Yamada | 1994-06-21 |
| 5302832 | Method for evaluation of spatial distribution of deep level concentration in semiconductor crystal | Yutaka Kitagawara, Ryoji Hoshi | 1994-04-12 |
| 5254172 | Rotating furnace tube having a non-rotating slidable work holder for processing semiconductor substrates | Toshio Otaki, Hitoshi Ikeda, Masato Yamada | 1993-10-19 |
| 5228927 | Method for heat-treating gallium arsenide monocrystals | Yutaka Kitagawara, Susumu Kuwahara | 1993-07-20 |
| 5209811 | Method for heat-treating gallium arsenide monocrystals | Yutaka Kitagawara, Susumu Kuwahara | 1993-05-11 |
| 4905058 | Light-emitting semiconductor device | Masato Yamada, Shinji Orimo | 1990-02-27 |