Patent ID: 7291188

Claim:
A polishing cloth used for a chemical mechanical polishing treatment, which comprises a molded body of a (meth)acrylic copolymer having an acid value of 10 to 100 mg KOH/g and a hydroxyl group value of 50 to 150 mg KOH/g, wherein the (meth)acrylic copolymer is represented by general formula (I) given below, in which the atomic group generating the acid value is formed of a constituting unit based on the (meth)acrylic acid, and the atomic group generating the hydroxyl group value is formed of a constituting unit based on the (meth)acrylic acid hydroxyalkyl ester: where R1, R2 and R3 independently denote a hydrogen atom or a methyl group, R4 denotes a linear or branched alkylene group having 2 to 4 carbon atoms, R5 denotes a linear or branched alkyl group having 1 to 18 carbon atoms, and each of 1, m and n denotes the amount (% by weight) of the constituting unit based on each monomer, the values of 1, m and n being chosen to permit the copolymer to exhibit an acid value of 10 to 100 mg KOH/g and a hydroxyl group value of 50 to 150 mg KOH/g.