Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5094976 | Dopant film and methods of diffusing impurity into and manufacturing a semiconductor wafer | Hideyoshi Ito, Kenji Unetsubo | 1992-03-10 |
| 5073517 | Dopant film and methods of diffusing impurity into and manufacturing a semiconductor wafer | Hideyoshi Ito, Kenji Unetsubo | 1991-12-17 |
| 5024867 | Dopant film and methods of diffusing impurity into and manufacturing a semiconductor wafer | — | 1991-06-18 |
| 4588473 | Semiconductor wafer process | Kiyoshi Hisatomi | 1986-05-13 |
| 4502252 | Lapping machine | — | 1985-03-05 |