Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6159283 | Apparatus and method for measuring mechanical strength of neck portion of seed crystal and method for producing silicon single crystal | Isamu Harada, Masaru Toyoshima, Toshinari Murai, Eiichi Iino | 2000-12-12 |
| 5902395 | Method for feeding granular silicon material, feed pipe used in the method, and method of manufacturing a silicon monocrystal | Naoki Nagai, Isamu Harada, Chihiro Tashiro | 1999-05-11 |
| 5900055 | Method of manufacturing silicon monocrystal by continuously charged Czochralski method | Naoki Nagai, Koji Mizuishi | 1999-05-04 |
| 5885365 | Cleaning method of crucible | Shiniti Sugai, Kouzou Yokota, Tadashi Niwayama, Shiniti Kon | 1999-03-23 |
| 5876496 | Method for feeding a granular raw material and feeding apparatus | Naoki Nagai, Chihiro Tashiro, Atsushi Ozaki | 1999-03-02 |
| 5868835 | Apparatus for recharging of silicon granules in a czochralski single crystal growing operation | Naoki Nagai, Seiichiro Ohtsuka, Isamu Harada | 1999-02-09 |
| 5855232 | Automatic metering/supplying apparatus for granular substances | Shiniti Sugai, Chihiro Tashiro | 1999-01-05 |
| 5733368 | Method of manufacturing silicon monocrystal using continuous czochralski method | Naoki Nagai, Isamu Harada | 1998-03-31 |
| 5690733 | Method for recharging of silicon granules in a Czochralski single crystal growing operation | Naoki Nagai, Seiichiro Ohtsuka, Isamu Harada | 1997-11-25 |
| 5419277 | Method and apparatus for producing a Czochralski growth semiconductor single-crystal | Masahiko Urano | 1995-05-30 |
| 5330729 | Single crystal pulling apparatus | Koji Mizuishi | 1994-07-19 |
| 5254319 | Single crystal pulling apparatus | Koji Mizuishi | 1993-10-19 |
| 5106593 | Apparatus for producing Czochralski-grown single crystals | Koji Mizuishi, Yasushi Nakamura, Seiichiro Ohtsuka, Atsushi Shiozawa, Fumio Yamada +3 more | 1992-04-21 |
| 5089239 | Wire vibration prevention mechanism for a single crystal pulling apparatus | Koji Mizuishi, Isamu Harada, Yasushi Nakamura, Seiichiro Ohtsuka, Yoshihiro Hirano +1 more | 1992-02-18 |
| 5020775 | Isolation valve used in a single crystal pulling apparatus | Atsushi Iwasaki, Koji Mizuishi | 1991-06-04 |