Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8252404 | High resistivity silicon wafers | Masataka Hourai | 2012-08-28 |
| 7803228 | Process for producing high-resistance silicon wafers and process for producing epitaxial wafers and SOI wafers | Kazunari Kurita, Hiroyuki Takao, Masataka Hourai | 2010-09-28 |
| 7700394 | Method for manufacturing silicon wafer method | Wataru Sugimura, Masanori Akatsuka, Masataka Hourai | 2010-04-20 |
| 7397110 | High resistance silicon wafer and its manufacturing method | Nobumitsu Takase, Hideshi Nishikawa, Makoto Ito, Koji Sueoka | 2008-07-08 |
| 7316745 | High-resistance silicon wafer and process for producing the same | Nobumitsu Takase, Hiroyuki Takao, Koji Sueoka, Masataka Horai | 2008-01-08 |
| 7226571 | High resistivity silicon wafer and method for fabricating the same | Nobumitsu Takase, Takayuki Kihara, Masataka Hourai | 2007-06-05 |
| 7220308 | Manufacturing method of high resistivity silicon single crystal | Nobumitsu Takase, Hideshi Nishikawa, Makoto Ito, Koujl Sueoka | 2007-05-22 |
| 6803242 | Evaluation method of IG effectivity in semiconductor silicon substrates | Takayuki Kihara, Koji Sueoka | 2004-10-12 |
| 6641888 | Silicon single crystal, silicon wafer, and epitaxial wafer. | Eiichi Asayama, Masataka Horai, Shigeru Umeno, Yasuo Koike, Kouji Sueoka +1 more | 2003-11-04 |
| 6277193 | Method for manufacturing semiconductor silicon epitaxial wafer and semiconductor device | Tooru Nagashima, Yasuo Koike, Masaharu Ninomiya, Takeshi Kii | 2001-08-21 |
| 6129787 | Semiconductor silicon wafer, semiconductor silicon wafer fabrication method and annealing equipment | Naoshi Adachi, Masakazu Sano, Tsuyoshi Kubota | 2000-10-10 |