Method for producing high purity silicon

Details Method for producing high purity silicon Method for producing high purity silicon

2006-02-28

2009-11-10

King, Roy (Department: 1793)

Chemistry of inorganic compounds

Silicon or compound thereof

Elemental silicon

C423S348000

Reexamination Certificate

active

07615202

ABSTRACT:
An object of the invention is to provide a method for producing a large amount of inexpensive high purity silicon useful for a solar battery. Disclosed is a method for producing high purity silicon by migrating impurities in silicon to slag including performing a first slag purification of a first silicon, separating the slag from the first silicon after finishing the first slag purification, and feeding the separated slag to a second molten silicon in a second purification of the second silicon, wherein purity of said second silicon prior to purification is lower than purity of the first silicon after purification.

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