Issued Patents All Time
Showing 1–25 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7064033 | Semiconductor device and method of manufacturing same | Yoshifumi Okabe, Akira Kuroyanagi | 2006-06-20 |
| 6949434 | Method of manufacturing a vertical semiconductor device | Yoshifumi Okabe, Akira Kuroyanagi | 2005-09-27 |
| 6903417 | Power semiconductor device | Yoshifumi Okabe, Akira Kuroyanagi | 2005-06-07 |
| 6649478 | Semiconductor device and method of manufacturing same | Yoshifumi Okabe, Akira Kuroyanagi | 2003-11-18 |
| 6498366 | Semiconductor device that exhibits decreased contact resistance between substrate and drain electrode | Yoshifumi Okabe, Akira Kuroyanagi | 2002-12-24 |
| 5994187 | Method of manufacturing a vertical semiconductor device | Yoshifumi Okabe, Akira Kuroyanagi | 1999-11-30 |
| 5876861 | Sputter-deposited nickel layer | Ichiharu Kondo, Takao Yoneyama, Osamu Takenaka | 1999-03-02 |
| 5798550 | Vertical type semiconductor device and gate structure | Akira Kuroyanagi, Yoshifumi Okabe, Yasuaki Tsuzuki, Yutaka Tomatsu | 1998-08-25 |
| 5689130 | Vertical semiconductor device with ground surface providing a reduced ON resistance | Yoshifumi Okabe, Akira Kuroyanagi | 1997-11-18 |
| 5663096 | Method of manufacturing a vertical semiconductor device with ground surface providing a reduced ON resistance | Yoshifumi Okabe, Akira Kuroyanagi | 1997-09-02 |
| 5596217 | Semiconductor device including overvoltage protection diode | Shoji Toyoshima | 1997-01-21 |
| 5461253 | Semiconductor substrate structure for producing two isolated circuits on a same substrate | Kazuhiro Tsuruta, Seizi Huzino, Mitutaka Katada, Tadashi Hattori | 1995-10-24 |
| 5360765 | Method of forming electrodes of semiconductor device | Ichiharu Kondo, Takao Yoneyama | 1994-11-01 |
| 5313092 | Semiconductor power device having walls of an inverted mesa shape to improve power handling capability | Kazuhiro Tsuruta, Mitutaka Katada, Seiji Fujino | 1994-05-17 |
| 5264720 | High withstanding voltage transistor | Hiroshi Muto | 1993-11-23 |
| 5250449 | Vertical type semiconductor device and method for producing the same | Akira Kuroyanagi, Yoshifumi Okabe | 1993-10-05 |
| 5248623 | Method for making a polycrystalline diode having high breakdown | Hiroshi Muto | 1993-09-28 |
| 5242862 | Semiconductor device and method of manufacturing same | Yoshifumi Okabe, Akira Kuroyanagi | 1993-09-07 |
| 5204282 | Semiconductor circuit structure and method for making the same | Kazuhiro Tsuruta, Seizi Huzino, Mitutaka Katada, Tadashi Hattori | 1993-04-20 |
| 5168337 | Polycrystalline diode and a method for making the same | Hiroshi Muto | 1992-12-01 |
| 5164218 | Semiconductor device and a method for producing the same | Kazuhiro Tsuruta, Mitutaka Katada, Seiji Fujino | 1992-11-17 |
| 5136348 | Structure and manufacturing method for thin-film semiconductor diode device | Yukio Tsuzuki, Hiroshi Muto | 1992-08-04 |
| 5128823 | Power semiconductor apparatus | Hiroshi Fujimoto, Yukio Tsuzuki | 1992-07-07 |
| 5072277 | Semiconductor device with gradually varying doping levels to compensate for thickness variations | Toshio Sakakibara | 1991-12-10 |
| 4994880 | Semiconductor device constituting bipolar transistor | Naohito Kato, Yoshiyuki Miyase, Tomoatsu Makino, Kasuhiro Yamada, Takeshi Matsui +3 more | 1991-02-19 |