Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Nobuaki Ito0
Date of Patent
November 10, 2009
Patent Application Number
11885750
Date Filed
February 28, 2006
Patent Primary Examiner
Patent 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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