Pad conditioner for chemical mechanical polishing apparatus

Abrading – Machine – Rotary tool

Reexamination Certificate

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Details

C451S443000, C451S529000

Reexamination Certificate

active

11368704

ABSTRACT:
A pad conditioner may include a surface having a first region including a portion having relatively irregular shaped and friable polishing particles, and a second region including a portion having relatively regular shaped and tough polishing particles. The relatively regular shaped and tough polishing particles may be provided on the edge portion of the surface and the relatively irregular shaped and friable polishing particles may be provided on the center portion of the surface.

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patent: 1999-0081117 (1999-11-01), None

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