Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12227872 | Single-crystal pulling apparatus and single-crystal pulling method | Kiyotaka Takano, Wataru Yajima, Hiroyuki Kamada, Tomohiko Ohta | 2025-02-18 |
| 12188153 | Single-crystal pulling apparatus with saddle-shaped superconducting coils and single-crystal pulling method | Kiyotaka Takano, Hiroyuki Kamada, Takahide ONAI, Tomohiko Ohta | 2025-01-07 |
| 12084788 | Method for producing a silicon single crystal doped with nitrogen and having a controlled amount of carbon impurities | Ryoji Hoshi, Tomohiko Ohta | 2024-09-10 |
| 11053606 | Method of producing silicon single crystal, and silicon single crystal wafer | Ryoji Hoshi | 2021-07-06 |
| 9783912 | Silicon single crystal growing apparatus and method for growing silicon single crystal | Ryoji Hoshi | 2017-10-10 |
| 9650725 | Method for manufacturing a defect-controlled low-oxygen concentration silicon single crystal wafer | Ryoji Hoshi, Hiroyuki Kamada | 2017-05-16 |
| 8885915 | Method for measuring and controlling distance between lower end surface of heat shielding member and surface of raw material melt and method for manufacturing silicon single crystal | Masahiko Urano, Ryoji Hoshi | 2014-11-11 |
| 8858706 | Single-crystal manufacturing apparatus and single-crystal manufacturing method | Toshiro Shimada | 2014-10-14 |
| 8083852 | Single crystal growth method and single crystal pulling apparatus | Ryoji Hoshi, Masanori Takazawa, Yuuichi Miyahara, Atsushi Iwasaki | 2011-12-27 |