Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882289 | Method of making a semiconductor memory device with recessed array region | Noboru Moriuchi, Yoshiki Yamaguchi, Toshihiko Tanaka, Norio Hasegawa, Yoshifumi Kawamoto +2 more | 1989-11-21 |
| 4873203 | Method for formation of insulation film on silicon buried in trench | Shinichiro Kimura, Tokuo Kure, Yoshifumi Kawamoto, Hideo Sunami | 1989-10-10 |
| 4873560 | Dynamic random access memory having buried word lines | Hideo Sunami, Shinichiro Kimura | 1989-10-10 |