Title:
GRAPHITE CRUCIBLE FOR SINGLE CRYSTAL PULLING APPARATUS, AND METHOD FOR MANUFACTURING THE GRAPHITE CRUCIBLE
Document Type and Number:
WIPO Patent Application WO/2012/105488
Kind Code:
A1
Abstract:
Provided are a graphite crucible for a single crystal pulling apparatus, which has a longer service life time, and a method for manufacturing the graphite crucible.
A graphite crucible (2) that holds a quartz crucible (1) is configured of a graphite crucible base material (3) as a graphite crucible forming body, and a film (4), which is formed on the entire surface of the graphite crucible base material (3), and which is composed of a carbide of a phenol resin. The phenol resin is applied further to the inside of open pores (5) in the surface of the graphite crucible base material (3). The area where the film (4) is formed is not limited to the entire surface of the graphite crucible, but may be merely an area where conversion into SiC easily advances. For instance, the film may be precipitated merely on the entire inner surface of the crucible or merely on a bent portion (small chamfered portion) of the inner surface or merely on the bent portion and a straight body portion.
Inventors:
OKADA OSAMU (JP)
HIROSE YOSHIAKI (JP)
YOKOI TOMOMITSU (JP)
OGITA YASUHISA (JP)
HIROSE YOSHIAKI (JP)
YOKOI TOMOMITSU (JP)
OGITA YASUHISA (JP)
Application Number:
PCT/JP2012/051975
Publication Date:
August 09, 2012
Filing Date:
January 30, 2012
Export Citation:
Assignee:
TOYO TANSO CO (JP)
OKADA OSAMU (JP)
HIROSE YOSHIAKI (JP)
YOKOI TOMOMITSU (JP)
OGITA YASUHISA (JP)
OKADA OSAMU (JP)
HIROSE YOSHIAKI (JP)
YOKOI TOMOMITSU (JP)
OGITA YASUHISA (JP)
International Classes:
C30B15/10; C04B41/87; C30B29/06
Foreign References:
| JPH02172887A | 1990-07-04 | |||
| JP2002145693A | 2002-05-22 | |||
| JP2004059332A | 2004-02-26 |
Attorney, Agent or Firm:
KITADAI, Tetsuo et al. (JP)
Tetsuo Kitadai (JP)
Tetsuo Kitadai (JP)
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Claims: