发明名称 |
Vorrichtung und Verfahren zum Ziehen von Einkristallen nach dem Czochralski-Verfahren |
摘要 |
An image of the meniscus ring (21) between the crystal (20) and the melt (4) is formed by optical means (12, 24) on a sensor, the signals of which yield the actual value for the diameter of the crystal. Two optical measuring devices are provided, the optical paths of which are defined by base points on the meniscus ring (21) and two planes which are offset by 90 DEG to each other and which are parallel to the main axis of the crystal and in tangential contact with the meniscus ring (21). The two optical paths are preferably set up to intersect, their intersection being in the viewing window. |
申请公布号 |
DE19548845(B4) |
申请公布日期 |
2008.04.10 |
申请号 |
DE1995148845 |
申请日期 |
1995.12.27 |
申请人 |
CRYSTAL GROWING SYSTEMS GMBH |
发明人 |
AUFREITER, JOACHIM;BRUES, DIETER;ALTEKRUEGER, BURKHARD |
分类号 |
C30B15/26;G01B11/08;H01L21/208 |
主分类号 |
C30B15/26 |
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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