Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9422636 | Method and apparatus for producing single crystals composed of semiconductor material | Helge Riemann, Joerg Fischer, Matthias Renner | 2016-08-23 |
| 8337615 | Method for producing a monocrystalline Si wafer having an approximately polygonal cross-section and corresponding monocrystalline Si wafer | Anke Luedge, Andris Muiznieks, Helge Riemann | 2012-12-25 |
| 7326297 | Device for the production of crystal rods having a defined cross-section and column-shaped polycrystallization structure by means of floating-zone continuous crystallization | Helge Riemann | 2008-02-05 |