Apparatus for horizontal production of single crystal structure
US3944393A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 1973 |
| Grant date | Mar 16, 1976 |
| Priority date | — |
| Expiry date | Nov 21, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T117/1092
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A seed holder for holding a seed crystal of gallium arsenide (GaAs) is fitted into one end of a cylindrical quartz boat in which a melt of gallium (Ga) and arsenic (As) is synthesized and then grown as a single crystal seeded by the seed crystal using the Bridgeman process or the gradient freeze process. The seed holder closely encompasses three sides of a crystal (e.g., of rectangular cross section) while exposing only the end upon which the crystal growth is to take place. The exposed end of the crystal seed is disposed above the bottom of the boat to prevent contact between the gallium melt and the seed until synthesis is nearly complete.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.