Patent ID: 8025813

Claim:
A chemical mechanical polishing composition, comprising, as initial components: a first substance according to formula I wherein each of R 1 , R 2 , R 3 , R 4 , R 5 , R 6 and R 7 is a bridging group having a formula —(CH 2 ) n —, wherein n is an integer selected from 1 to 10, and wherein, optionally, one or more of the nitrogens in the first substance can be provided in a quaternary form, where the nitrogen assumes a positive charge; a second substance according to formula II wherein each of R 8 , R 9 , R 10 , R 11 and R 12 is selected from hydrogen and an alkyl group having 1 to 6 carbon atoms, wherein, optionally, two or more of R 8 , R 9 , R 10 , R 11 and R 12 are combined into a ring structure, and wherein, optionally, one or more of the nitrogens in the second substance can be provided in a quaternary form, where the nitrogen assumes a positive charge; an abrasive; and water.