Patent ID: 7604751

Claim:
A method comprising chemical mechanical polishing a surface comprising an insulating layer and a metal layer using a polishing liquid composition comprising an amine compound represented by the following general formula: wherein R 3 is a linear or branched alkyl group having 4 to 18 carbon atoms, or a linear or branched alkenyl group having 4 to 18 carbon atoms, or an aryl group having 6 to 18 carbon atoms, or an aralkyl group having 7 to 18 carbon atoms; each of R 4 and R 5 , which may be identical or different, is a linear alkyl group having 1 to 8 carbon atoms or a branched alkyl group having 3 to 8 carbon atoms, or a group represented by H—(OR 6 ) z —wherein R 6 is a linear alkylene group having 1 to 3 carbon atoms, or a branched alkylene group having 3 carbon atoms; and Z is a number of 1 to 20, and/or a salt thereof, an etching agent, at least one of an oxidizing agent and an abrasive, and water.