Patent ID: 7762870

Claim:
A method for producing a polishing pad having a polishing layer, comprising: preparing an aqueous resin containing ionic groups in the range of 100-1100 eq/ton by introducing ionic groups into a polyester resin by copolymerizing a polyvalent carboxylic acid and a polyvalent alcohol, said ionic groups being selected from the group consisting of a carboxyl group, ammonium carboxylate group, sulfonate group, and alkali metal sulfonate; preparing an aqueous dispersion of the aqueous resin by dissolving the aqueous resin in a water-soluble organic compound, adding water thereto, and removing the water-soluble organic compound; mixing abrasive grains in the aqueous dispersion of the aqueous resin, wherein a homogenous dispersion without aggregation is formed; applying the homogenous dispersion on a substrate to form a layer and drying the layer; and forming a polishing pad using the layer as a polishing layer.