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Polishing head capable of continuously varying pressure distribution between pressure regions for uniform polishing
Polishing head capable of continuously varying pressure distribution between pressure regions for uniform polishing
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机译:能够连续改变压力区域之间压力分布的抛光头,以实现均匀抛光
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摘要
A polishing apparatus which includes a polishing head for holding a work, and a polishing plate on which a polishing pad is adhered. The polishing head includes a holding plate, an elastic sheet member fixed to an edge of the holding plate, a ring-shaped template fixed to an outer edge of a lower face of the elastic sheet member, a pressure chamber formed between a lower face of the holding plate and an upper face of the elastic sheet member, a seal ring having a main body part which is fitted to a supporting plate, a seal lip, which slidelingly contacts the elastic sheet member and divides the inside of the pressure chamber into an inner divided chamber and an outer divided chamber; and a fluid supply section for individually supplying a fluid to the divided chambers.
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