Issued Patents All Time
Showing 1–25 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10276666 | Semiconductor device | Yasuyuki Hoshi, Shoji Yamada, Takashi Shiigi | 2019-04-30 |
| 10236677 | Semiconductor device | Tatsuya Naito | 2019-03-19 |
| 9905555 | Semiconductor device and semiconductor device manufacturing method | Tatsuya Naito | 2018-02-27 |
| 9881916 | Semiconductor device | Tatsuya Naito | 2018-01-30 |
| 9793392 | Semiconductor device | Akimasa Kinoshita | 2017-10-17 |
| 9559171 | Semiconductor device | Tatsuya Naito | 2017-01-31 |
| 8242556 | Vertical and trench type insulated gate MOS semiconductor device | Koh Yoshikawa, Hiroki Wakimoto | 2012-08-14 |
| 8008734 | Power semiconductor device | Hiroki Wakimoto, Takashi Shiigi | 2011-08-30 |
| 7737490 | Vertical and trench type insulated gate MOS semiconductor device | Koh Yoshikawa, Hiroki Wakimoto | 2010-06-15 |
| 7633122 | Insulated gate semiconductor device and method of manufacturing the same | — | 2009-12-15 |
| 7462911 | Insulated gate semiconductor device | Hiroki Wakimoto, Seiji Momota | 2008-12-09 |
| 7151297 | Insulated gate semiconductor device | Hiroki Wakimoto, Seiji Momota | 2006-12-19 |
| 6737705 | Insulated gate semiconductor device | Seiji Momota, Yuichi Onozawa, Hiroki Wakimoto | 2004-05-18 |
| 6670650 | Power semiconductor rectifier with ring-shaped trenches | Michio Nemoto, Tatsuya Naito, Mitsuaki Kirisawa | 2003-12-30 |
| 6621120 | Semiconductor device | Seiji Momota, Mitsuaki Kirisawa, Takashi Yoshimura | 2003-09-16 |
| 6559023 | Method of fabricating a semiconductor device with phosphorous and boron ion implantation, and by annealing to control impurity concentration thereof | Seiji Momota, Mitsuaki Kirisawa, Takashi Yoshimura | 2003-05-06 |
| 6501128 | Insulated gate transistor and the method of manufacturing the same | — | 2002-12-31 |
| 6218888 | Insulated gate bipolar transistor device with a current limiting circuit | — | 2001-04-17 |
| 5894139 | Semiconductor device structure for insulated gate bipolar transistor | Ryu Saito, Yasuhiko Onishi | 1999-04-13 |
| 5714774 | Two-gate semiconductor power switching device | Katsunori Ueno | 1998-02-03 |
| 5705835 | Semiconductor device and method of manufacturing the same | Akira Nishiura | 1998-01-06 |
| 5606183 | Double-gated turn-off thyristor | Katsunori Ueno | 1997-02-25 |
| 5561313 | Protective diode for transistor | Ryu Saitoh, Akira Nishiura | 1996-10-01 |
| 5561393 | Control device of semiconductor power device | Ken'ya Sakurai, Noriho Terasawa, Tadashi Miyasaka, Akira Nishiura, Masaharu Nishiura | 1996-10-01 |
| 5559355 | Vertical MOS semiconductor device | Tomoyuki Yamazaki, Shigeyuki Obinata, Seiji Momota, Tatsuhiko Fujihira | 1996-09-24 |