Issued Patents 1997
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5694357 | Nonvolatile semiconductor memory device for storing multi-value data | — | 1997-12-02 |
| 5679590 | Method for manufacturing contact hole for a nonvolatile semiconductor device | Masaki Sato, Kuniyoshi Yoshikawa | 1997-10-21 |
| 5666311 | Method of making semiconductor device having isolating trenches | — | 1997-09-09 |
| 5657271 | Nonvolatile semiconductor memory device in which band to band tunneling current is suppressed | — | 1997-08-12 |
| 5652449 | Semiconductor device with an insulating film separating conductive layers and method of maufacturing semiconductor device | Takeshi Shinagawa | 1997-07-29 |
| 5646888 | Semiconductor device having isolating regions | — | 1997-07-08 |