Issued Patents All Time
Showing 1–25 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12297560 | Method for manufacturing monocrystalline silicon by the Czochralski process by pulling a first straight body having a first diameter and a second straight body having a second diameter larger than the first diameter | Takashi IZEKI | 2025-05-13 |
| 12252803 | N-type silicon single crystal production method, n-type silicon single crystal ingot, silicon wafer, and epitaxial silicon wafer | Koichi Maegawa, Yasufumi KAWAKAMI, Fukuo Ogawa, Ayumi Kihara | 2025-03-18 |
| 12031231 | Low resistivity wafer | Masayuki Uto | 2024-07-09 |
| 11702760 | N-type silicon single crystal production method, n-type silicon single crystal ingot, silicon wafer, and epitaxial silicon wafer | Koichi Maegawa, Yasufumi KAWAKAMI, Fukuo Ogawa, Ayumi Kihara | 2023-07-18 |
| 11598023 | Low resistivity wafer and method of manufacturing thereof | Masayuki Uto | 2023-03-07 |
| 11377755 | N-type silicon single crystal production method, n-type silicon single crystal ingot, silicon wafer, and epitaxial silicon wafer | Koichi Maegawa, Yasufumi KAWAKAMI, Fukuo Ogawa, Yuuji Tsutsumi | 2022-07-05 |
| 11242617 | Method for producing silicon single crystal | Koichi Maegawa, Yasufumi KAWAKAMI, Fukuo Ogawa | 2022-02-08 |
| 11047065 | Method for producing silicon single crystal, heat shield, and single crystal pulling device | Masayuki Uto | 2021-06-29 |
| 10982350 | Silicon monocrystal production method | Toshimichi Kubota | 2021-04-20 |
| 10916425 | Method for manufacturing silicon single crystal, flow straightening member, and single crystal pulling device | Fukuo Ogawa, Koichi Maegawa, Yasufumi KAWAKAMI | 2021-02-09 |
| 10895018 | Method for producing silicon single crystal | Toshimichi Kubota | 2021-01-19 |
| 10329686 | Method for producing single crystal | Toshimichi Kubota, Masayuki Uto | 2019-06-25 |
| 10294583 | Producing method and apparatus of silicon single crystal, and silicon single crystal ingot | Shinichi Kawazoe, Fukuo Ogawa, Masahiro Irokawa, Toshimichi Kubota | 2019-05-21 |
| 10233562 | Method for producing single crystal, and method for producing silicon wafer | Toshimichi Kubota, Fukuo Ogawa, Masayuki Uto | 2019-03-19 |
| 10233564 | Manufacturing method of monocrystalline silicon and monocrystalline silicon | Shinichi Kawazoe, Fukuo Ogawa | 2019-03-19 |
| 10227710 | Manufacturing method of silicon monocrystal | Toshimichi Kubota, Masayuki Uto | 2019-03-12 |
| 10100429 | Method for producing a silicon single crystal doped with red phosphorous with reduced number of stacking faults and method for producing a silicon wafer using the same | Masayuki Uto, Toshimichi Kubota | 2018-10-16 |
| 9212431 | Silicon single crystal pulling device and graphite member used therein | Shinichi Kawazoe, Fukuo Ogawa, Tsuneaki Tomonaga, Toshimichi Kubota | 2015-12-15 |
| 9074298 | Processes for production of silicon ingot, silicon wafer and epitaxial wafer, and silicon ingot | Shinichi Kawazoe, Toshimichi Kubota, Fukuo Ogawa | 2015-07-07 |
| 8961686 | Method of manufacturing monocrystal, flow straightening cylinder, and monocrystal pulling-up device | Shinichi Kawazoe, Fukuo Ogawa, Toshimichi Kubota | 2015-02-24 |
| 8920561 | Silicon single crystal pull-up apparatus that pulls a doped silicon single crystal from a melt | Shinichi Kawazoe, Fukuo Ogawa, Toshimichi Kubota, Tomohiro Fukuda | 2014-12-30 |
| 8888911 | Method of producing single crystal silicon | Masayuki Uto, Tuneaki Tomonaga, Toshimichi Kubota, Fukuo Ogawa | 2014-11-18 |
| 8871023 | Silicon single crystal pull-up apparatus and method of manufacturing silicon single crystal | Keiichi Takanashi, Kengo Hayashi | 2014-10-28 |
| 8852340 | Method for manufacturing single crystal | Fukuo Ogawa, Shinichi Kawazoe, Toshimichi Kubota | 2014-10-07 |
| 8840721 | Method of manufacturing silicon single crystal | Fukuo Ogawa, Toshimichi Kubota | 2014-09-23 |