Patent ID: 7153369

Claim:
A chemical mechanical polishing process comprising: polishing a polishing film with an aqueous chemical mechanical polishing dispersion comprising particles and water; wherein said particles consist of polymer particles consisting of a polymer having at least one functional group which can react with a metal of a polishing surface of the polishing film, and said polymer consists of polymerized units of (i) at least one monomer (A) selected from the group consisting of 3-amino-2-hydroxypropyl (meth)acrylate, aminoalkyl group-containing (meth)acrylates, aminoalkoxyalkyl group-containing (meth)acrylates, 2-(2′-hydroxy-5′-methacryloxyethylphenyl)-2H-benzotriazole, 2-(2′-hydroxy-5-methacryloxyethyl-3′-t-butylphenyl)-2H-benzotriazole, 1,2,2,6,6-pentamethyl-4-piperidyl (meth)acrylate, 2,2,6,6-tetramethyl-4-piperidyl (meth)acrylate, N-alkyl group-containing (meth)acrylamides, N-aminoalkyl group-containing (meth)acrylamides, vinylpyridines, amides of unsaturated carboxylic acids, imides of unsaturated carboxylic acids, and N-methylol-converted unsaturated carboxylamides, and (ii) one or more other polymerizable unsaturated monomers (B) selected from the group consisting of a vinyl aromatic compound, an unsaturated carboxylic compound, an unsaturated dicarboxylic acid anhydride, an acrylic acid ester and a methacrylic acid ester, wherein the polymer particles are present in the aqueous dispersion in an amount of from 1 to 3% by weight based on the total weight of the aqueous dispersion.