Patent ID: 8801959
Filing Date: 2014-08-12
Classification: C09G,C09K,H01L

Abstract:
1. A stabilized, concentratable chemical mechanical polishing composition for polishing a silicon wafer, comprising: water; an abrasive; a cation according to formula (I): wherein R 1 , R 2 , R 3 , R 4 are independently selected from the group consisting of a hydrogen and a C 1-10 alkyl group, a C 1-10 aryl group, a C 1-10 arylalkyl group and a C 1-10 alkylaryl group; and, piperazine or a piperazine derivative according to formula (II) wherein R 5 is selected from the group consisting of a hydrogen, a C 1-10 alkyl group, a C 1-10 aryl group, a C 1-10 arylalkyl group and a C 1-10 alkylaryl group; and, optionally, a pH adjusting agent; wherein the polishing composition exhibits a silicon removal rate of at least 300 nm/min.