Patent ID: 6908722

Claim:
An acid generator having a structure of the following formula (I), wherein V independently represents an oxygen atom, a halogen, or a monovalent organic group, and R is a monovalent organic group with a fluorine content of 50 wt % or less, a nitro group, a cyano group, or a hydrogen atom and Z 1 and Z 2 individually represent a fluorine atom or a linear or branched perfluoroalkyl group having 1-10 carbon atoms; wherein the monovalent organic group with a fluorine content of 50 wt % or less is selected from the group consisting of: —R 11 , —CO—R 11 , —COO—R 11 CON(R 11 )(R 12 ), —S—R 11 , —SO—R 11 , and —SO 2 —R 11 and R 12 individually represent a substituted or unsubstituted linear, branched or cyclic monovalent hydrocarbon group with 1-30 carbon atoms, a substituted or unsubstituted aryl group with 6-30 carbon atoms, or a substituted or unsubstituted monovalent heterocyclic organic group with 4-30 carbon atoms.