Polishing pad having a pressure relief channel

Stock material or miscellaneous articles – Structurally defined web or sheet – Longitudinal or transverse tubular cavity or cell

Reexamination Certificate

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C451S527000, C451S533000

Reexamination Certificate

active

10869657

ABSTRACT:
The present invention provides a chemical mechanical polishing pad comprising a window formed in the polishing pad, the window having a void provided on a side thereof. The polishing pad further comprises a void-pressure relief channel provided in the polishing pad from the void to a periphery of the polishing pad.

REFERENCES:
patent: 5605760 (1997-02-01), Roberts
patent: 6884156 (2005-04-01), Prasad et al.
patent: 2002/0115379 (2002-08-01), Sevilla et al.
patent: 2003/0171081 (2003-09-01), Komukai et al.
patent: 2003-300150 (2003-10-01), None
Webster's II Dictionary, 1984, p. 1321.

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