Patent ID: 7303852

Claim:
A photoacid generating compound of General Formula (1): wherein R 1 is an alkylene group of 2 to 8 carbon atoms; and R 2 is a single bond, an oxygen atom, a nitrogen atom or an alkylene group of 1 to 4 carbon atoms; R 3 is a straight-chained, branched or cyclic alkyl group of 1 to 8 carbon atoms, or an aryl group of 6 to 10 carbon atoms, and may be substituted with an alkyl group of 1 to 4 carbon atoms, a fluorinated alkyl group of 1 to 4 carbon atoms, an alkoxy group of 1 to 4 carbons, a fluorinated alkoxy group of 1 to 4 carbons atoms, a nitro group, a cyano group, a fluorine atom, a phenyl group, a substituted phenyl group, an acetyl group or a benzoyloxy group; either of or both of Rf 1 and Rf 2 are straight-chained, branched or cyclic alkyl groups, each having 1 to 20 carbon atoms containing at least one fluorine atom, and may comprise a hydroxyl group, a carbonyl group, an ester group, an ether group or an aryl group; when only one of Rf 1 and Rf 2 is the straight-chained, branched or cyclic alkyl group, having 1 to 20 carbon atoms containing at least one fluorine atom, the other thereof is a straight-chained, branched or cyclic alkyl group, having 1 to 20 carbon atoms, and may comprise a hydroxyl group, a carbonyl group, an ester group, an ether group or an aryl group; and Rf 1 and Rf 2 may be bonded together and form a ring.