Patent ID: 6168508
Filing Date: 2001-01-02
Classification: B24B

Abstract:
A polishing pad for chemical-mechanical polishing of an integrated circuit wafer surface, said integrated circuit wafer surface having a diameter, comprising: a first polishing area comprising a single wafer contact surface material with a first value of a property selected from a group consisting of pore size, perforations, elastic and shear modulus, hardness, specific gravity, compressibility and abrasiveness; and a second polishing area comprising a single wafer contact surface material with a second value of said property which said second value is different from the first value, such that during chemical-mechanical polishing of an integrated circuit wafer surface, the integrated circuit wafer rotates and oscillates on the, polishing pad so that a substantial portion of the integrated circuit wafer surface contacts both the first and second polishing areas, wherein widths of said first and second polishing areas are substantially less than about the diameter of the integrated circuit wafer.