Use of acid washing to provide purified silicon crystals
US8480991B2 · kind B2 · utility
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13References
19Claims
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Key dates
| Filing date | Jul 23, 2008 |
| Grant date | Jul 9, 2013 |
| Priority date | — |
| Expiry date | Jul 23, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/20
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for purifying silicon wherein silicon is crystallized from a solvent metal. The method comprises the steps of providing a molten liquid containing silicon, a solvent metal and impurities, cooling the molten liquid to form first silicon crystals and a first mother liquor, separating the first silicon crystals from the first mother liquor, contacting the first silicon crystals with compound which will dissolve the first mother liquor and separating the washed crystals from the wash solution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.