CARBON CRUCIBLE
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United States of America Patent
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N/A
Issued Date -
Jun 27, 2013
app pub date -
Aug 26, 2011
filing date -
Sep 6, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A carbon crucible prevents leakage of SiO gas from a boundary portion between a straight trunk portion and a tray portion and prevents SiC formation from quickly developing. A carbon crucible (5) for retaining a quartz crucible (4) used in a metal single crystal pulling apparatus for silicon or the like has a straight trunk portion (9) and a tray portion (10) that are divided from each other. A graphite sheet (11) is disposed between the quartz crucible (4) and the carbon crucible (5) so as to cover at least a boundary portion (A) of an inner surface of the carbon crucible (5) between the straight trunk portion (9) and the tray portion (10). The graphite sheet (11) is an expanded graphite sheet.
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