发明名称 |
Silica crucibles and methods for making the same |
摘要 |
Silica crucibles containing an inner layer which is substantially pure and substantially bubble-free and methods for making such crucibles. The inner layer is also substantially stable against roughening and spot devitrification. The inner layer is formed by making a web structure which is then converted to a continuous layer, thereby minimizing or eliminating bubble formation. The inner layer is also formed using a gettering agent which getters alkaline and alkaline-earth elements while the inner layer is formed. The alkaline and alkaline-earth elements are gettered on an innermost portion of the inner layer which is later removed, leaving an inner layer with relatively few impurities. When used in a CZ-crystal growing process, the inner surface of the crucible remains smooth and substantially no bubbles grow in the inner layer.
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申请公布号 |
US2002166340(A1) |
申请公布日期 |
2002.11.14 |
申请号 |
US20010808719 |
申请日期 |
2001.03.15 |
申请人 |
KEMMOCHI KATSUHIKO;TOGAWA TAKAYUKI;MOSIER ROBERT;SPENCER PAUL |
发明人 |
KEMMOCHI KATSUHIKO;TOGAWA TAKAYUKI;MOSIER ROBERT;SPENCER PAUL |
分类号 |
C03B20/00;C03B19/09;C30B15/10;C30B29/06;(IPC1-7):C03B19/04 |
主分类号 |
C03B20/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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