Katsuhiko Kemmochi - Camas WA, US Robert Joseph Coolich - North Bonneville WA, US Michael Randall Fallows - Vancouver WA, US
Assignee:
Heraeus Shin-Etsu America, Inc. - Camas WA
International Classification:
C30B 15/10 C30B 15/00
US Classification:
117 13, 117217
Abstract:
During a CZ or similar process, a silica crucible is held in a graphite or similar susceptor while being heated to above between about 1580 and 1620 degrees C. Vents or grooves formed in at least one of the outer surface of the crucible and the inner surface of the susceptor permit gasses to vent upwardly and out from between the crucible and susceptor. This permits gas evolved from the crucible as a result of the heat to be vented rather than expanding between the crucible and susceptor thereby deforming the crucible.
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