Patent ID: 7833690

Claim:
A photoacid generator of Formula (III): wherein Y 1 , Y 2 , and Y 3 are independently selected from the group consisting of alkylene, alkenylene, fluoroalkylene, and fluoroalkenylene; Z 1 , Z 2 , and Z 3 are independently selected from the group consisting of: and —O—C(O)—O—R 7 wherein R 1 , R 2 , R 3 ,R 4 , R 5 , and R 6 are independently selected from the group consisting of -hydrogen, -alkyl, -alkylene, -fluoroalkyl, -fluoroalkenyl, -aryl, -substituted aryl, —O-alkyl, -halo, -cyano, and -nitro; and wherein R 7 is selected from the group consisting of -hydrogen, -alkyl, -alkenyl, -fluoroalkyl, -fluoroalkenyl, -pyranyl, and -adamantyl, L − is selected from the group consisting of a sulfonate compound, BF 4 − , PF 6 − , and SbF 6 − ; and X + is selected from the group consisting of a sulfonium compound and an ionium compound.