Issued Patents 1994
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5358824 | Photosensitive resin composition utilizing 1,2-naphthoquinone diazide compound having spirobichroman or spirobiindane ring | Yasunori Takata, Yoshimasa Aotani, Fumiyuki Nishiyama | 1994-10-25 |
| 5340686 | Positive-type photoresist composition | Shinji Sakaguchi, Tadayoshi Kokubo | 1994-08-23 |
| 5324618 | Positive type quinonediazide photoresist composition containing select tetraphenolic additive | Yasumasa Kawabe, Tadayoshi Kokubo | 1994-06-28 |
| 5318875 | Positive quinonediazide photoresist composition containing select hydroxyphenol additive | Yasumasa Kawabe, Toshiaki Aoai, Tadayoshi Kokubo | 1994-06-07 |