Patent ID: 7183211
Filing Date: 2007-02-27
Classification: C09G,H01L

Abstract:
1. A process for chemical mechanical polishing of a semiconductor substrate characterized in that a surface to be polished of said semiconductor substrate is polished under conditions of a rotation speed of a polishing table fixing a polishing pad at the range from 50 to 200 rpm and a pressing pressure of said semiconductor substrate fixed to a polishing head against said polishing pad at the range from 700 to 1 8,000 Pa, by using an aqueous dispersion for chemical mechanical polishing comprising (A) an abrasive and (B) at least one compound selected from the group consisting of 2,3-pyridinedicarboxylic acid, 2,3-pyridinedicarboxylic anhydride, 2,5-pyridinedicarboxylic acid, 3,4-pyridinedicarboxylic acid, 3,5-pyridinedicarboxylic acid, 4,4′-dicarboxy-2,2′-bipyridine and 5,5′-dicarboxy-2,2′-bipyridine, and said polishing pad, wherein said surface to be polished has an insulting layer, wherein said insulting layer has a modulus of 20 GPa or less measured by a nanoindentation method, wherein said abrasive (A) is comprised of at least one kind of particle selected from the group consisting of an inorganic particle and an organic particle, and an organic-inorganic composite particle, wherein abrasive (A) is a organic-inorganic composite particle, and wherein the organic-inorganic composite particle is obtained by polycondensating alkoxysilane, aluminum alkoxide, or titanium alkoxide in the presence of a particle of polystyrene or polymethyl methacrylate.