Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8742474 | Power semiconductor device having an active region and an electric field reduction region | Atsushi Narazaki, Hitoshi Uemura | 2014-06-03 |
| 8692323 | Semiconductor device with peripheral base region connected to main electrode | Kazunari Hatade | 2014-04-08 |
| 8274095 | Semiconductor device | — | 2012-09-25 |
| 8183631 | Semiconductor device | Kazunari Hatade | 2012-05-22 |
| 8017974 | Semiconductor device with increased withstand voltage | — | 2011-09-13 |
| 7180106 | Semiconductor device having enhanced di/dt tolerance and dV/dt tolerance | Kazunari Hatade | 2007-02-20 |
| 6580121 | Power semiconductor device containing at least one zener diode provided in chip periphery portion | — | 2003-06-17 |
| 5545573 | Method of fabricating insulated gate semiconductor device | Atsushi Narazaki | 1996-08-13 |
| 5321295 | Insulated gate bipolar transistor and method of fabricating the same | — | 1994-06-14 |
| 5246877 | Method of manufacturing a semiconductor device having a polycrystalline electrode region | Hiroshi Yamaguchi | 1993-09-21 |
| 4609933 | Gate turn-off thyristor having P.sup.+ gate and emitter | Toshihiro Nakajima, Kozo Yamagami | 1986-09-02 |