专利名称：Vitreous silica crucible
发明人：Sudo, Toshiaki,Kitahara, Ken,Suzuki,
Koichi,Yamazaki, Shinsuke
申请号：EP11191129.3申请日：20111129公开号：EP2460912A2公开日：20120606
摘要：Provided is a vitreous silica crucible which is resistant to deformation andcorrosion even when heated at high temperature for a long time. There is provided avitreous silica crucible of the present invention including a substantially cylindricalstraight body portion, a curved bottom portion, and a corner portion smoothlyconnecting the straight body portion and the bottom portion, wherein a wall of thevitreous silica crucible includes, from an inner surface side, a transparent layer and abubble-containing layer, and a ratio of a thickness of the bubble-containing layer withrespect to a thickness of the transparent layer at an intermediate position between anupper end and a lower end of the straight body portion is 0.7 to 1.4.
申请人：Japan Super Quartz Corporation
地址：5-14-3 Barajima Akita-shi Akita 010-0065 JP
国籍：JP
代理机构：Gulde Hengelhaupt Ziebig & Schneider
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