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Title:
METHOD FOR CONTINUOUSLY CASTING SILICON INGOTS
Document Type and Number:
WIPO Patent Application WO/2011/104799
Kind Code:
A1
Abstract:
Provided is a method for continuously casting silicon ingots by introducing a silicon source material to a bottomless cooling crucible disposed in a chamber, melting the silicon source material by means of electromagnetic induction heating using an induction coil, and solidifying the molten silicon while lowering the molten silicon from the cooling crucible. A pipe which opens at the top and the bottom of the cooling crucible is connected to a sidewall of the chamber, a partition board is disposed between the upper end of the cooling crucible and the sidewall of the chamber, and casting is performed while introducing atmospheric gas through the pipe from the top of the cooling crucible to the bottom of the cooling crucible and while blocking, by means of the partition board, the flow of atmospheric gas flowing from the bottom of the cooling crucible to the top of the cooling crucible. Therefore, when continuous casting is carried out, the molten silicon is prevented from being contaminated by metal impurities caused by free convection of the atmospheric gas in the chamber.

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Inventors:
NAITOU, Nobumasa (2-1 Shibaura 1-chome, Minato-k, Tokyo 34, 〒1058634, JP)
内藤　宣正 (〒34 東京都港区芝浦一丁目２番１号株式会社ＳＵＭＣＯ内 Tokyo, 〒1058634, JP)
Application Number:
JP2010/006841
Publication Date:
September 01, 2011
Filing Date:
November 24, 2010
Export Citation:
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Assignee:
SUMCO CORPORATION (2-1 Shibaura 1-chome, Minato-ku Tokyo, 34, 〒1058634, JP)
株式会社ＳＵＭＣＯ (〒34 東京都港区芝浦一丁目２番１号 Tokyo, 〒1058634, JP)
NAITOU, Nobumasa (2-1 Shibaura 1-chome, Minato-k, Tokyo 34, 〒1058634, JP)
International Classes:
C01B33/02; B22D11/00; B22D11/04; B22D21/04; B22D25/04; B22D27/02
Attorney, Agent or Firm:
MORI, Michio et al. (M. MORI PATENT OFFICE, 17-23 Higashinaniwa-cho 5-chome, Amagasaki-sh, Hyogo 92, 〒6600892, JP)
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Claims:



 
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