Issued Patents All Time
Showing 126–132 of 132 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5492859 | Method for producing semiconductor device substrate by bonding a porous layer and an amorphous layer | Takao Yonehara, Shoji Nishida | 1996-02-20 |
| 5466631 | Method for producing semiconductor articles | Takeshi Ichikawa, Takao Yonehara, Masaru Sakamoto, Yasuhiro Naruse, Jun Nakayama +1 more | 1995-11-14 |
| 5458755 | Anodization apparatus with supporting device for substrate to be treated | Yasutomo Fujiyama, Mitsuhiro Ishii, Senju Kanbe, Takao Yonehara, Toru Takisawa +3 more | 1995-10-17 |
| 5439843 | Method for preparing a semiconductor substrate using porous silicon | Takao Yonehara, Mamoru Miyawaki | 1995-08-08 |
| 5374581 | Method for preparing semiconductor member | Takeshi Ichikawa, Takao Yonehara | 1994-12-20 |
| 5277748 | Semiconductor device substrate and process for preparing the same | Takao Yonehara | 1994-01-11 |
| 5258322 | Method of producing semiconductor substrate | Takao Yonehara | 1993-11-02 |