Apparatus for manufacturing crystals through floating zone method
US5367981A · kind A · utility
Inventor
Key dates
| Filing date | Apr 7, 1993 |
| Grant date | Nov 29, 1994 |
| Priority date | — |
| Expiry date | Apr 7, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T117/1028
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A apparatus for manufacturing crystals through a floating zone method which includes: structure for forming a heat-melt zone so as to be held at an upper portion of a solid crystal; a barrier enclosure having an opening a lower end portion and provided in the vicinity of an upper surface of the heat-melt zone; structure for supplying a raw material granular crystal into the barrier enclosure; and structure for moving the solid crystal and the heat-melt zone forming structure relative to each other to thereby bring about crystal growth, wherein the barrier enclosure has a bottom surface being flat or inclined toward the center of the barrier enclosure, and wherein the opening is constituted by at least one hole formed in the bottom surface of the barrier enclosure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.