发明名称 |
Manufacturing method for calcium fluoride crystal and processing method for calcium fluoride powder |
摘要 |
A manufacturing method for a single crystal of calcium fluoride includes the steps of degassing calcium fluoride powder particles to desorb impurities from surfaces of the calcium fluoride powder particles, preprocessing the degassed calcium fluoride powder particles by fusing the degassed calcium fluoride powder particles in a crucible to obtain a preprocessed product, and re-fusing the preprocessed product in a crucible to grow a single crystal of calcium fluoride. <IMAGE> |
申请公布号 |
EP0919646(B2) |
申请公布日期 |
2006.04.05 |
申请号 |
EP19980122797 |
申请日期 |
1998.12.01 |
申请人 |
NIKON CORPORATION |
发明人 |
MIZUGAKI, TSUTOMU,;KIMURA, KAZUO,;TAKANO, SHUUICHI, |
分类号 |
C30B29/12;F26B5/04;B01J6/00;B01J19/00;C01F11/22;C30B11/00 |
主分类号 |
C30B29/12 |
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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