Method for purifying silicon and silicon

Chemistry of inorganic compounds – Silicon or compound thereof – Elemental silicon

Reexamination Certificate

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C423S349000, C423S350000

Reexamination Certificate

active

07625541

ABSTRACT:
The invention provides a method for purifying silicon which comprises a step of blowing a treating gas generated by reacting carbon with an oxidized gas into a molten silicon, as well as silicon produced by the method. Carbon can be held in a container, the oxidized gas can be passed through the container, and the oxidized gas can contain at least one of water vapor and hydrogen.

REFERENCES:
patent: 5972107 (1999-10-01), Schmid et al.
patent: 2005/0139148 (2005-06-01), Fujiwara et al.
patent: 2116956 (1983-10-01), None
patent: 4-228414 (1992-08-01), None
patent: 6-227808 (1994-08-01), None
patent: 6-2277808 (1994-08-01), None
patent: 8-73209 (1996-03-01), None
patent: 2001-58811 (2001-03-01), None
patent: 2004-262746 (2004-09-01), None
patent: WO 03066523 (2003-08-01), None
International Search Report of PCT/JP2005/018423, mailed Jan. 17, 2006.
Advanced Physical Chemistry for Process Metallurgy, pp. 108-109, Published 1997.
CN 1628076 A, Jun. 15, 2005, corresponds to US 2005/139148 A1 (with English Abstract).

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