COVER FOR VITREOUS SILICA CRUCIBLE AND VITREOUS SILICA CRUCIBLE AND METHOD OF HANDLING THE SAME
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United States of America Patent
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Issued Date -
Oct 25, 2012
app pub date -
Jun 1, 2010
filing date -
Jun 2, 2009
priority date (Note) -
Abandoned
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Abstract
By providing a method capable of avoiding invasion of starting material powder for crucible into an inner face of the crucible, it is made possible to reliably avoid the invasion of foreign substances into a vitreous silica crucible until an actual use time of the crucible and to handle the crucible with no contamination. A cover 3 mounted onto an opening portion 2 of a vitreous silica crucible 1, comprising a flange portion 4 in close contact with an outer peripheral end 2a of the opening portion 2, is mounted onto the crucible 1.
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