Patent ID: 6843712
Filing Date: 2005-01-18
Classification: B24B,B24D

Abstract:
1. A polishing pad comprising a hydrophilic polishing layer with a polishing surface, the polishing layer comprising a polishing material having: i. a density greater than 0.5 g/cm ii. a critical surface tension greater than or equal to 34 milliNewtons per meter; iii. a tensile modulus of 0.02 to 5 GigaPascals; iv. a ratio of tensile modulus at 30° C. to tensile modulus at 60° C. of 1.0 to 2.5; v. a hardness of 25 to 80 Shore D; vi. a yield stress of 300-6000 psi; vii. a tensile strength of 1000 to 15,000 psi; and viii. an elongation to break less than or equal to 500%; the polishing material being useful for chemical mechanical polishing for the manufacture of semiconductor substrates comprising a polymer pad material selected from the group comprising urethane, carbonate, amide, sulfone, vinyl chloride, acrylate, methacrylate, vinyl alcohol, ester and acrylamide; wherein the polishing layer is porous and the polishing layer is formed without cutting or skiving parallel to the polishing surface.