Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10992269 | Compound semiconductor device with high power and reduced off-leakage and method for manufacturing the same | Atsushi Yamada, Junji Kotani, Norikazu Nakamura, Kozo Makiyama | 2021-04-27 |
| 10847642 | Compound semiconductor device and fabrication method | Junji Kotani, Norikazu Nakamura | 2020-11-24 |
| 10600901 | Compound semiconductor device and manufacturing method thereof | Junji Kotani, Norikazu Nakamura | 2020-03-24 |
| 10431656 | Semiconductor crystal substrate with Fe doping | Atsushi Yamada, Junji Kotani, Norikazu Nakamura | 2019-10-01 |
| 10270404 | Compound semiconductor device and method of manufacturing the same | Norikazu Nakamura, Atsushi Yamada | 2019-04-23 |
| 9997594 | Gallium nitride based high electron mobility transistor (GaN-HEMT) device with an iron-doped cap layer and method of manufacturing the same | Atsushi Yamada, Norikazu Nakamura | 2018-06-12 |
| 9899492 | Compound semiconductor device and method for manufacturing the same | Atsushi Yamada | 2018-02-20 |
| 9502525 | Compound semiconductor device and method of manufacturing the same | Atsushi Yamada, Norikazu Nakamura, Kenji Imanishi | 2016-11-22 |
| 9312341 | Compound semiconductor device, power source device and high frequency amplifier and method for manufacturing the same | Norikazu Nakamura | 2016-04-12 |
| 9269799 | Semiconductor apparatus | Atsushi Yamada, Norikazu Nakamura | 2016-02-23 |
| 9184241 | Semiconductor apparatus | Atsushi Yamada, Norikazu Nakamura | 2015-11-10 |
| 9029868 | Semiconductor apparatus having nitride semiconductor buffer layer doped with at least one of Fe, Si, and C | Junji Kotani, Atsushi Yamada, Norikazu Nakamura | 2015-05-12 |
| 8878248 | Semiconductor device and fabrication method | Atsushi Yamada | 2014-11-04 |
| 8592823 | Compound semiconductor device and method for manufacturing the same | Junji Kotani, Shuichi Tomabechi | 2013-11-26 |
| 8476642 | Compound semiconductor device and manufacturing method thereof | Atsushi Yamada | 2013-07-02 |