Patent ID: 8075800

Claim:
A polishing slurry for polishing an inorganic insulating film containing a slurry in which particles are dispersed in a medium and an additive, wherein the particles consist of cerium hydroxide, the pH of the polishing slurry is from 3 to 9 and the additive is a polymer containing at least one kind of monomer component selected from the group consisting of monomers represented by general formula (I) below wherein in the general formula (I), R 1 denotes hydrogen, a methyl group, a phenyl group, a benzil group, a chlorine group, a difluoromethyl group, a trifluoromethyl group or a cyano group, and, R 2 and R 3 , respectively, independently denote hydrogen or an alkyl chain having 1 to 18 carbon atoms, a methylol group, an acetyl group or a diacetonyl group, and a case where both are hydrogen is not included) and a general formula (II) below wherein in the general formula (II), R 1 is common with the formula (I) and R 4 denotes a morpholino group, a thiomorpholino group, a pyrrolidinyl group or a piperidino group) wherein the polishing slurry is capable of polishing an inorganic insulating film.