Method for purifying silicon
US6632413B2 · kind B2 · utility
7Cited by
10References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 21, 2001 |
| Grant date | Oct 14, 2003 |
| Priority date | — |
| Expiry date | Aug 21, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B33/037
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of purifying silicon, comprising feeding a sparging gas into a liquid melt [10] containing molten silicon and at least one impurity, in which the sparging gas is used to react with or move one or more impurity contained within the silicon. The products of such reaction or movement may be removed, e.g., by liquid-gas extraction, by liquid-liquid extraction or by liquid-solid extraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.