Patent ID: 7059941

Claim:
A process for selectively increasing a ratio of a polishing rate of an insulating film to that of a stopper film, wherein the insulating film and the stopper film are included in a substrate, said process comprising applying to the substrate a polishing composition having a pH of from 10 to 13, wherein the polishing composition comprises at least one compound selected from the group consisting of: (A) a monoamine compound represented by Formula (I): wherein each of R 1 , R 2 and R 3 is independently selected from the group consisting of hydrogen atom, an alkyl group having 1 to 6 carbon atoms and an alkenyl group having 2 to 6 carbon atoms, with proviso that a total number of carbon atoms in R 1 , R 2 and R 3 is from 1 to 8; (B) a diamine compound represented by Formula (II): wherein each of R 4 , R 5 , R 7 and R 8 is independently selected from the group consisting of hydrogen atom, an alkyl group having 1 to 6 carbon atoms and an alkanol group having 1 to 6 carbon atoms; and R 6 is selected from the group consisting of a linear alkylene group having 1 to 18 carbon atoms, a branched alkylene group having 1 to 18 carbon atoms, a cyclic alkylene group having 1 to 18 carbon atoms, and a group represented by Formula (III): wherein each of R 9 and R 10 is independently selected from the group consisting of hydrogen atom and an alkyl group having 1 to 6 carbon atoms; and each of a and b is an integer of from 0 to 9, with proviso that a total number of carbon atoms in Formula (III) is from 2 to 18; (C) a monoamine compound represented by Formula (IV): wherein each of R 11 , R 12 and R 13 is independently selected from the group consisting of hydrogen atom, an alkyl group having 1 to 8 carbon atoms, an alkanol group having 1 to 8 carbon atoms, an alkanediol group having 1 to 8 carbon atoms, an alkanetriol group having 1 to 8 carbon atoms and a group represented by —(R 14 O) c R 15 ; R 14 is an alkylene group having 1 to 4 carbon atoms; R 15 is selected from the group consisting of hydrogen atom, an alkyl group having 1 to 18 carbon atoms and an acyl group having 1 to 18 carbon atoms; and c is an integer of from 1 to 20, with proviso that: (i) at least one of R 11 , R 12 and R 13 is selected from the group consisting of an alkanediol group having 1 to 8 carbon atoms, an alkanetriol group having 1 to 8 carbon atoms and a group represented by —(R 14 O) c R 35 , wherein R 35 is selected from the group consisting of an alkyl group having 1 to 18 carbon atoms and an acyl group having 1 to 18 carbon atoms; and (ii) in a case where at least one of R 11 , R 12 and R 13 is selected from the group consisting of an alkanol group having 1 to 8 carbon atoms and a group represented by —(R 14 O) c H, at least one of the other groups is an alkyl group having 1 to 8 carbon atoms; (D) a polyamine having at least three amino groups in its molecule; (E) an ether group-containing amine; and (F) a heterocyclic compound having nitrogen atom.