Patent ID: 9633865
Date: 2017-04-25
CPC Classifications: C09G,C23F,H01L

Claim:
1. An aqueous composition useful, for chemical mechanical polishing of a patterned semiconductor wafer containing a copper interconnect metal comprising an oxidizer, 0.01 to 15 weight percent benzotriazole inhibitor for the copper interconnect metal, 0.001 to 15 weight percent of a water soluble modified cellulose, 0.005 to 5 weight percent non-saccaride water soluble polymer, the non-saccaride polymer selected from at least one of copolymers formed from acrylic acid monomer and methacrylic acid monomer and amphiphilic polymers, the amphiphilic polymer being a block copolymer comprised of hydrophobic and hydrophilic segments, 0 to 15 weight percent complexing agent for the copper interconnect metal, 0 to 15 weight percent phosphorus compound, 0.4 to 5 weight percent diglycine, the diglycine being capable of complexing copper ions, and water; and the composition being abrasive-free and having an acidic pH.