Visual wear confirmation polishing pad

Details Visual wear confirmation polishing pad Visual wear confirmation polishing pad

2003-04-23

2008-10-28

Rose, Robert (Department: 3723)

Abrading

Abrading process

Glass or stone abrading

C451S533000

Reexamination Certificate

active

07442113

ABSTRACT:
A polishing pad having an upper layer with a first visual characteristic. The upper layer is adapted to erode against a pad conditioner at a uniform rate during a pad conditioning process. At least one lower layer with at least a second visual characteristic is disposed beneath the upper layer. The first visual characteristic is visually distinguishable from the second visual characteristic. The at least one lower layer is adapted to polish a substrate, where the visual distinguishability between the upper layer and the at least one lower layer provides a visual indication of whether the pad conditioning process has been accomplished in a uniform manner.

REFERENCES:
patent: 5736427 (1998-04-01), Henderson
patent: 5913713 (1999-06-01), Cheek et al.
patent: 6090476 (2000-07-01), Thysell et al.
patent: 6106661 (2000-08-01), Raeder et al.
patent: 6331137 (2001-12-01), Raeder et al.
patent: 6375559 (2002-04-01), James et al.

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