Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873203 | Method for formation of insulation film on silicon buried in trench | Toru Kaga, Shinichiro Kimura, Tokuo Kure, Yoshifumi Kawamoto | 1989-10-10 |
| 4873560 | Dynamic random access memory having buried word lines | Shinichiro Kimura, Toru Kaga | 1989-10-10 |
| 4860071 | Semiconductor memory using trench capacitor | Tokuo Kure, Atsushi Hiraiwa, Yasuo Wada | 1989-08-22 |