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US5795215A Method and apparatus for using a retaining ring to control the edge effect 失效
使用固定环来控制边缘效应的方法和装置

Method and apparatus for using a retaining ring to control the edge
effect
摘要:
A process using a retaining ring assembly of a carrier head to precompress a polishing pad to reduce or minimize the edge effect in a chemical mechanical polishing process.
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