发明名称 |
Substrat zur Verwendung mit Scheibenattraktionsgerät und dessen Herstellungsverfahren |
摘要 |
A wafer attracting apparatus includes a substrate made of a ceramic material and adapted to attract and hold a wafer onto an attracting surface thereof, wherein the attracting surface is constituted by a ductile worked surface, the ductile worked surface has concave portions, a diameter of each of the concave portions is 0.1 mu m or less, and when the wafer is attracted onto the attracting surface of the substrate and released therefrom, the number of particles attaching to that wafer is 9.3 or less per 1 cm<2>. |
申请公布号 |
DE69838889(D1) |
申请公布日期 |
2008.02.07 |
申请号 |
DE1998638889 |
申请日期 |
1998.03.06 |
申请人 |
NGK INSULATORS LTD. |
发明人 |
OHNO, MASASHI;YAMADA, NAOHITO;INOUE, TAKAHIRO;KATO, KOUJI |
分类号 |
H01L21/68;H01L21/683;H02N13/00 |
主分类号 |
H01L21/68 |
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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