Patent ID: 8864860
Filing Date: 2014-10-21
Classification: C09G,C09K,H01L

Abstract:
1. A polishing composition comprising (a) abrasive grains, (b) a processing accelerator, (c) at least one nonionic surfactant represented by R-POE (I), wherein R is a C 10-16 alkyl group having a branched structure, and POE is a polyoxyethylene chain, (d) at least one anionic surfactant, (e) a protective film-forming agent different from the nonionic surfactant or the anionic surfactant, (f) an oxidizing agent, and (g) water; wherein the concentration of the nonionic surfactant is from 0.02 to 0.2 wt %, based on the total weight of the composition, the nonionic surfactant has an HLB of from 8 to 12, and the anionic surfactant is present in an amount of from 0.005 to 0.1 weight %, based on the total weight of the polishing composition; wherein the polishing composition is capable of providing a stock removal rate of at least 300 nm/min, a dishing amount of less than 50 nm, and a dispersion stability as measured by a rate of transmittance of less than 5%, when supplied at 300 mL/min during polishing a Cu blanket wafer in a polishing machine at 0.9 psi and 100 rpm.