Patent ID: 7704668

Claim:
A positive-acting photoresist composition comprising: 1) a component that comprises photoacid-labile groups; 2) a triphenyl sulfonium salt photoacid generator compound having a cation component that is substituted with one or more of a moiety that has at least 6 carbon atoms and is selected from optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted heteroalkyl, optionally substituted heteroalkenyl or optionally substituted heteroalkynyl, and the photoacid generator compound having an anion compound that is i) an arylsulfonate counter anion substituted with one or more electron-withdrawing groups or ii) an alicyclic moiety that is substituted with one or more electron-withdrawing groups; and 3) propylene glycol methyl ether acetate, and wherein the composition contains less than about 10 weight percent, based on total weight of the composition, of a hydrolytic solvent.