Patent ID: 7160669
Filing Date: 2007-01-09
Classification: C07C,C07D,G03F,Y10S

Abstract:
1. A chemical amplification type positive resist composition comprising (A) an acid generator comprising at least one compound selected from the group consisting of a sulfonium salt of the formula (Ia) wherein Q 1 and Q 2 each independently represent alkyl having 1 to 6 carbon atoms or cycloalkyl having 3 to 10 carbon atoms, or Q 1 and Q 2 bond to form divalent acyclic hydrocarbon having 3 to 7 carbon atoms which form a ring together with the adjacent S + , Q 3 , Q 6 and Q 7 each independently represent hydrogen or methyl, Q 4 represents a group of the formula (X) wherein T represents hydrogen, alkyl having 1 to 10 carbon atoms or cycloalkyl having 3 to 10 carbon atoms, Z represents hydrogen, alkyl having 1 to 10 carbon atoms or cycloalkyl having 3 to 10 carbon atoms, K represents a divalent group selected from the group consisting of the following formulae n denotes an integer of from 0 to 10, and p denotes an integer of from 0 to 3, when n or p is 2 or more, each T may be the same or different and when n is 2 or more, each K may be the same or different, n with the proviso that when n a polymeric compound comprising a structural unit of the formula (Ib) wherein Q a sulfonium salt of the formula (Ic) wherein Q wherein T n Q (B) resin which contains a structural unit having an acid labile group and which itself is insoluble or poorly soluble in an alkali aqueous solution but becomes soluble in an alkali aqueous solution by the action of an acid.