Patent ID: 8623584

Claim:
A fluorine-free photoacid generator, said photoacid generator comprising an onium cationic component and an anionic component of formula (II): wherein: X is NR; R is selected from the group consisting of H; linear, branched, tertiary, or cyclic alkyl; linear, branched, tertiary or cyclic alkoxyl; unsubstituted and substituted aromatic groups; and unsubstituted and substituted heteroaromatic groups; Y is C; each of G 1 -G 5 is selected from the group consisting of R and an electron withdrawing moiety, provided that when at least one of G 1 -G 5 is an electron withdrawing moiety; and said onium cationic component is selected from the group consisting of sulfonium cations and iodonium cations.