System and method for crystal growing
US7344596B2 · kind B2 · utility
4Cited by
18References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2005 |
| Grant date | Mar 18, 2008 |
| Priority date | — |
| Expiry date | Jan 21, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T117/1092
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
To reduce the heat input to the bottom of the crucible and to control heat extraction independently of heat input, a shield can be raised between a heating element and a crucible at a controlled speed as the crystal grows. Other steps could include moving the crucible, but this process can avoid having to move the crucible. A temperature gradient is produced by shielding only a portion of the heating element; for example, the bottom portion of a cylindrical element can be shielded to cause heat transfer to be less in the bottom of the crucible than at the top, thereby causing a stabilizing temperature gradient in the crucible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.