Patent ID: 6722949
Filing Date: 2004-04-20
Classification: B24B,B24D

Abstract:
A ventilated platen/polishing pad assembly for chemical mechanical polishing comprising:a platen of circular shape made of a rigid material having a first thickness, a top surface and a bottom surface; a first multiplicity of apertures through said first thickness of said platen providing fluid communication between a gas inlet provided on said bottom surface and a first multiplicity of openings provided in said top surface of the platen; and a polishing pad having a second multiplicity of apertures therethrough for providing fluid communication between a second multiplicity of openings in a top surface of said polishing pad and said first multiplicity of openings in said top surface of the platen when said polishing pad is assembled to said top surface of the platen, wherein said top surface of the platen further comprises a multiplicity of recessed grooves to facilitate the flow of a gas from said gas inlet to said second multiplicity of openings in said top surface of the polishing pad.