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AssigneeSilicio Ferrosolar S.L.
InventorsShinji Tokumaru, Masataka HIiyoshi, Jiro Kondo, Hitoshi Dohnomae, Yutaka Kishida, Shigeru Nakazawa, Kozo Onoue
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Provided are a method for manufacturing a highly pure silicon by unidirectional solidification of molten silicon, that can inexpensively and industrially easily manufacture highly pure silicon that has a low oxygen concentration and low carbon concentration and is suitable for applications such as manufacturing solar cells; highly pure silicon obtained by this method and silicon raw material for manufacturing highly pure silicon. A method for manufacturing highly pure silicon using molten silicon containing 100 to 1000 ppmw of carbon and 0.5 to 2000 ppmw of germanium as the raw material when manufacturing highly pure silicon by unidirectionally solidifying molten silicon raw material in a casting container, the highly pure silicon obtained by this method, and the silicon raw material for manufacturing the highly pure silicon.
A method for producing high purity silicon characterised in that it is a method of high purity silicon production that produces high purity silicon by unidirectional solidification of raw material molten silicon in a molding vessel, and uses as said raw material molten silicon that has a carbon concentration of 100˜1000 ppmw, and a germanium concentration of 0.5˜2000 ppmw.
A silicon raw material for producing high purity silicon characterised in that it is a silicon raw material used to prepare high purity silicon, and together with containing carbon in a ratio of 100˜1000 ppmw, contains germanium in a ratio of 0.5˜2000 ppmw.
Dependencies are inferred from the claim text.