Heat shield assembly for crystal puller
US6197111A · kind A · utility
11Cited by
18References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1999 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Feb 26, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T117/1068
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A heat shield for a crystal puller including an inner and an outer reflector. The inner and outer reflectors are spaced from each other an have reduced surface area in which they contact each other. Improved heat shielding of a growing crystal ingot reduces defects and permits a greater throughput of ingots produced by the crystal puller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.