Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7771530 | Process and apparatus for producing a silicon single crystal | Wilfried von Ammon, Erich Tomzig, Yuri Gelfgat, Lenoid Gorbunov | 2010-08-10 |
| 7708830 | Method and device for the production of a silicon single crystal, silicon single crystal, and silicon semiconductor wafers with determined defect distributions | Wilfried von Ammon, Martin Weber, Thomas Wetzel, Herbert Schmidt | 2010-05-04 |
| 7335256 | Silicon single crystal, and process for producing it | Martin Weber, Wilfried von Ammon, Herbert Schmidt, Yuri Gelfgat, Leonid Gorbunov | 2008-02-26 |
| 7025827 | Doped semiconductor wafer of float zone pulled semiconductor material, and process for producing the semiconductor wafer | Rolf Knobel, Wilfried von Ammon, Manfred Grundner | 2006-04-11 |
| 6840998 | Silicon single crystal produced by crucible-free float zone pulling | Ludwig Altmannshofer, Manfred Grundner | 2005-01-11 |
| 6238477 | Process and device for the production of a single crystal | Wilfried von Ammon, Erich Tomzig | 2001-05-29 |
| 6132507 | Process and device for the production of a single crystal | Wilfried von Ammon, Erich Tomzig | 2000-10-17 |