Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6492232 | Method of manufacturing vertical semiconductor device | Zhirong Tang, Heemyong Park | 2002-12-10 |
| 6127230 | Vertical semiconductor device and method of manufacturing the same | Zhirong Tang, Heemyong Park | 2000-10-03 |
| 5872374 | Vertical semiconductor device | Zhirong Tang, Heemyong Park | 1999-02-16 |
| 5721438 | Heterojunction semiconductor device and method of manufacture | Zhirong Tang, John W. Steele | 1998-02-24 |
| 5302534 | Forming a vertical PNP transistor | David J. Monk, Robert H. Reuss | 1994-04-12 |
| 4902639 | Process for making BiCMOS integrated circuit having a shallow trench bipolar transistor with vertical base contacts | — | 1990-02-20 |
| 4782373 | Self-aligned semiconductor device with non-diffusable contacts | Clarence A. Lund | 1988-11-01 |