Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7936015 | Semiconductor device having trenches filled with a semiconductor having an impurity concentration gradient | Tetsuo Matsuda, Wataru Saito | 2011-05-03 |
| 7898031 | Semiconductor device with tapered trenches and impurity concentration gradients | Tetsuo Matsuda, Wataru Saito | 2011-03-01 |