Patent ID: 8366959
Filing Date: 2013-02-05
Classification: C09G,C09K,H01L

Abstract:
1. A stable colloidal dispersion for chemical mechanical polishing comprising: (a) 0.05% to about 10% by weight of an abrasive component and (b) a water-soluble polymer comprising: wherein the dispersion has a pH of between about 1.5 and about 6; wherein polymer is an amphoteric copolymer selected from the group consisting of: (a) a (block A)-(block B) diblock copolymer, wherein the at least one part A is the block A and the at least one part B is the block B; (b) a (block B)-(block A)-(block B) triblock copolymer, wherein the at least one part A is the block A and the at least one part B is the block B; or (c) a (backbone A)-(side chains B) comb copolymer, wherein the at least one part A is the backbone A and the comb copolymer is a plurality of side chains B each bonded to the backbone A at one of their ends.