Title:
CRUCIBLE, AND METHOD FOR MANUFACTURING SAPPHIRE SINGLE CRYSTAL USING THE SAME
Document Type and Number:
Japanese Patent JP2013060348
Kind Code:
A
Abstract:
To provide a crucible excellent in durability which suppresses the deformation of an opening under a high temperature usage environment at not lower than 2,000°C such as when manufacturing a sapphire single crystal.
The crucible 1 includes a crucible body comprising tungsten or molybdenum as a principal constituent and an annular reinforcing member 3 comprising a metal or an alloy having a melting point of not lower than 2,100°C at a side wall part 5 of the crucible body. The annular reinforcing member 3 is preferably made of tungsten or an alloy comprising tungsten as a principal constituent. The ratio (L2/L1) of the height L2 of the annular reinforcing member to the height L1 of the crucible body is preferably 0.001-1.
Inventors:
KASAMOTO MAKOTO
YAMAMOTO SHINICHI
SANO TAKASHI
YAMAMOTO SHINICHI
SANO TAKASHI
Application Number:
JP2011201225A
Publication Date:
April 04, 2013
Filing Date:
September 14, 2011
Export Citation:
Assignee:
TOSHIBA CORP
TOSHIBA MATERIALS CO LTD
TOSHIBA MATERIALS CO LTD
International Classes:
C30B29/20; C22C27/04; F27B14/10; B22F5/00; C30B15/10
Attorney, Agent or Firm:
Fujiwara Yasutaka
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