| 发明名称 |
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| 摘要 |
A crucible of pure transparent silica glass or pure translucent or opaque silica glass for the production of monocrystals used in making semiconductor elements which includes a hollow cylindrical part and a welded-on head. The head end of the hollow cylindrical part is formed from a tube with a head margin portion constricted towards the tube axis which is formed by shaping one end of the tube. A plate is welded into the aperture formed by the constricted head margin portion and has an area equal to at least one-tenth and at most four-fifths of the total head area made up by the head margin portion and the head. |
| 申请公布号 |
FR2208849(B1) |
申请公布日期 |
1980.04.11 |
| 申请号 |
FR19730042581 |
申请日期 |
1973.11.29 |
| 申请人 |
HERAEUS QUARZSCHMELZE GMBH |
发明人 |
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| 分类号 |
C03B23/20;C03B20/00;C03B23/207;C30B15/10;C30B35/00;(IPC1-7):03B23/20;01L3/04 |
主分类号 |
C03B23/20 |
| 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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