Patent ID: 7435356
Filing Date: 2008-10-14
Classification: C09G,H01L

Abstract:
1. An aqueous abrasive-free composition useful for chemical mechanical polishing of a patterned semiconductor wafer containing a nonferrous metal comprising an oxidizer, an inhibitor for the nonferrous metal, 0 to 15 weight percent water soluble modified cellulose, 0 to 15 weight percent phosphorus compound, 0.005 to 5 weight percent of an amphiphilic polymer, the amphiphilic polymer having an ionic hydrophilic portion with a carbon number of 2 to 250 and a hydrophobic end, the ionic hydrophilic portion containing an anionic hydrophilic segment, the hydrophilic segment containing polyacrylic acid, polymethacrylic acid or a copolymer of polyacrylic acid, polymethacrylic acid, the hydrophobic end including an alkylmercaptan and water.