Patent ID: 6911297

Claim:
A radiation sensitive composition comprising: a) a first photoacid generator (PAG) compound P1, which comprises one or more compounds of the structure (A); b) a second photoacid generator compound P2 which comprises one or more compounds of the structure (B); c) a polymer component comprising an alkali soluble resin component whose alkali solubility is suppressed by the presence of acid sensitive moieties and whose alkali solubility is returned by treatment with an acid and, optionally, heat; wherein said polymer comprises one or more polymers comprising the monomer unit (C); and d) a solvent; wherein structure (A) has the formula: wherein R 1 and R 2 are each independently selected from the group consisting of C 1 -C 12 fluoroalkyl groups or together R 1 and R 2 are joined with the N to form a (F 2 C) y N ring where y=4-12; R 3 , R 4 , and R 5 are each independently selected from the group consisting of unsubstituted aryl, alkyl or alpha-ketomethyl groups or such groups substituted with an acid sensitive group, or R 3 and R 4 together with the S atom form a cycloalkylsulfonium ring; R 6 to R 11 and R 6′ to R 11′ are independently selected from the group consisting of branched or linear alkyl, alkoxy, halogen, hydrogen, OCO 2 G, OCH 2 CO 2 G, and OG where G=an acid sensitive group; wherein structure (B) has the formula: wherein each R 12 is independently selected from the group consisting of a linear, cyclic, or branched C 1 -C 8 fluoroalkyl group, substituted or unsubstituted phenyl group, substituted or unsubstituted naphthalene group, C 6 -C 12 cyclic or alicyclic hydrocarbon, and a linear, cyclic, or branched C 1 -C 8 alkyl group; and wherein monomeric unit (C) has the formula: wherein R 13 is selected from the group consisting of H, C 1 -C 4 lower alkyl, CN, and CH 2 CO 2 R 20 ; R 14 and R 15 are each independently selected from the group consisting of H, linear or branched C 1 -C 4 alkyl, and halogen; R 16 is selected from the group consisting of H and branched or linear C 1 -C 4 alkyl; R 17 is selected from the group consisting of substituted or unsubstituted phenyl, a substituted or unsubstituted linear, branched or cyclic C 1 -C 20 alkyl, optionally containing an ether or ester group, a substituted or unsubstituted phenylalkylene, and a substituted or unsubstituted C 6 -C 20 cyclic alkylene ; R 18 and R 19 are each independently selected from the group consisting of H, linear or branched or cyclic C 1 -C 14 alkyl, and C 7 -C 14 alicyclic; R 20 is selected from the group consisting of a C 1 -C 14 branched, linear or cyclic alkyl, substituted or unsubstituted phenyl, and C 7 -C 14 alicyclic group.