Shaped crystal fiber growth method
US4605468A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 10, 1984 |
| Grant date | Aug 12, 1986 |
| Priority date | — |
| Expiry date | Jul 10, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T117/1036
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
An apparatus and method pulling a shaped crystalline fiber of a given crystal-forming material from a liquid reservoir of the material. The apparatus includes a vessel in which the liquid material is maintained as a liquid reservoir at a temperature above the melting point or crystal-forming temperature of the material. A die is provided having an inner-tubular surface which includes a crystal shaping portion which is tapered. The liquid flows from the reservoir through the die so that the liquid flows from the narrow end of the shaping portion to the wide end of the shaping portion. The temperature of the liquid crystal growth material is selectively lowered at the top end of the die to form crystalline material which is continually pulled from the crystal-liquid interface. The apparatus is operated to maintain the crystal-liquid interface within the crystal shaping portion of the die to provide accurate shaping of the crystal by the tubular surface and to maintain accurate alignment of the crystal fiber with the die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.