Pull method for growth of single crystal using density detector and apparatus therefor
US5476064A · kind A · utility
1Cited by
5References
5Claims
0Family size
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Key dates
| Filing date | Mar 18, 1994 |
| Grant date | Dec 19, 1995 |
| Priority date | — |
| Expiry date | Mar 18, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T117/1032
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The density of a melt precisely represents the stability of the melt, so that the initiation of pulling-up operation can be determined on the basis of the changing rate of the density. The pulling-up operation may be started when the density becomes constant, or when the changing rate of the density with respect to the temperature becomes smaller. Since the melt or clusters do not include different minute structures, an obtained single crystal is of high quality free from minute faults or dislocations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.