Patent ID: 8853082
Filing Date: 2014-10-07
Classification: B24B,C09G,C09K,H01L

Abstract:
1. A polishing method for polishing a substrate with a polishing liquid for CMP, the polishing method comprising the steps of: (A) providing a polishing liquid for CMP that comprises wherein the abrasive grain comprises a cerium-based particle, wherein the additive comprises wherein X wherein the nonionic surfactant is at least one surfactant selected from the group consisting of an ether-type surfactant, an ester-type surfactant, an aminoether-type surfactant, an ether ester-type surfactant, an alkanolamide-type surfactant, polyvinylpyrrolidone, polyacrylamide, and polydimethylacrylamide, and wherein a pH of the polishing liquid for CMP is less than 7; (B) providing a substrate and a polishing member, wherein the substrate has an insulating film on a surface of the substrate; (C) feeding the polishing liquid for CMP between the insulating film on the substrate and a polishing member; and (D) polishing the insulating film on the substrate with the polishing member.