Patent ID: 7838482

Claim:
A CMP polishing slurry, comprising cerium oxide particles, a dispersing agent, a water-soluble polymer wherein the added amount of the water-soluble polymer is 0.01 part or more by weight and 10 parts or less by weight for 100 parts by weight of the polishing slurry, and water, wherein the water-soluble polymer is a polymer containing a structural unit made of at least one polymerizable monomer selected from the group consisting of the following general formula (I): wherein R 1 represents hydrogen, a methyl group, a phenyl group, a benzyl group, a chloro group, a difluoromethyl group, a trifluoromethyl group, or a cyano group; and R 2 and R 3 each independently represent hydrogen, an alkyl chain of C 1 to C 18 , a methylol group, or an acetyl group provided that the case that both of R 2 and R 3 are hydrogen is excluded.