Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5360692 | Positive type 1,2-naphthoquinonediazide photoresist composition containing benzotriazole light absorbing agent | Yasumasa Kawabe, Tadayoshi Kokubo | 1994-11-01 |
| 5340697 | Negative type photoresist composition | Hiroshi Yoshimoto, Tadayoshi Kokubo | 1994-08-23 |
| 5324619 | Positive quinone diazide photoresist composition containing select polyhydroxy additive | Yasumasa Kawabe, Tadayoshi Kokubo | 1994-06-28 |
| 5290658 | Positive type photoresist composition comprising polyaromatic hydroxy quinone diazide esters as the photosensitive ingredient | Yasumasa Kawabe, Tadayoshi Kokubo | 1994-03-01 |