METHOD FOR MANUFACTURING CRUCIBLE FOR POLYCRYSTALLINE SILICON PRODUCTION

Title:

METHOD FOR MANUFACTURING CRUCIBLE FOR POLYCRYSTALLINE SILICON PRODUCTION

Document Type and Number:

Japanese Patent JP2010280529

Kind Code:

A

Abstract:

To provide a method for manufacturing a crucible for polycrystalline silicon production, which exerts sufficient strength, both at room temperature and at a temperature around melting point of silicon, so that it can be manufactured in large size and is highly effective in preventing impurity contamination of polycrystalline silicon ingot produced using the crucible.

The method for manufacturing the crucible for polycrystalline silicon production by a slip casting method comprises pouring a slurry into a casting mold and molding and firing the same, provided that the slurry comprises a molten silica powder having an average particle size of ≥1 and ≤40 μm, an alumina powder having an average particle size of <1 μm and a silica powder having an average particle size of <1 μm dispersed therein.

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Inventors:

OHASHI TADASHI
MATSUYAMA TOYOKAZU
FUJITA MITSUHIRO
TANAKA HIDENORI
KASHIMA KAZUHIKO

Application Number:

JP2009134662A

Publication Date:

December 16, 2010

Filing Date:

June 04, 2009

Export Citation:

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Assignee:

COVALENT MATERIALS CORP

International Classes:

C04B35/14; B22C1/00; B22D25/04; B28B1/26; B28B11/04; C01B33/02; F27B14/10; H01L31/04

Attorney, Agent or Firm:

Kinoshita Shigeru
Rie Ishimura

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