Patent ID: 7485028
Filing Date: 2009-02-03
Classification: B23H,B24B

Abstract:
1. A chemical mechanical polishing retaining ring comprising a polymer matrix and a filler forming a separate solid phase dispersed in the polymer matrix, the polymer matrix and filler forming a heterogeneous material, the filler comprising polyimide, the chemical mechanical polishing retaining ring having a wear rate performance not greater than about 75 microns/hour, the wear rate performance determinable by abrading the chemical mechanical polishing retaining ring in a processing apparatus for one hour using a 75 ml per minute slurry flow rate of Cabot SS12 slurry, the processing apparatus including a Rodel K- groove (IC1400) pad and a head that secures the chemical mechanical polishing retaining ring, the pad being rotated counter-clockwise at 300 RPM and the head being rotated counter-clockwise at 60 RPM, a down force of 50 lb f being applied by the head, giving a pressure of 10.5 psi on the chemical mechanical polishing retaining ring.