Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695571 | Cleaning method using a defluxing agent | Keiji Watanabe, Masayuki Ochiai, Ei Yano, Nobuo Igusa, Isamu Takachi | 1997-12-09 |
| 5643831 | Process for forming solder balls on a plate having apertures using solder paste and transferring the solder balls to semiconductor device | Masayuki Ochiai, Hidefumi Ueda, Michio Sono, Ichiro Yamaguchi, Kazuhiko Mitobe +6 more | 1997-07-01 |
| 5633121 | Method for examining surface of copper layer in circuit board and process for producing circuit board | Takahisa Namiki, Ei Yano | 1997-05-27 |