Patent ID: 7662448

Claim:
A photosensitive resin composition useful for forming column spacers for a liquid crystal display device, the composition comprising an alkali-soluble resin, a reactive unsaturated compound, a photoinitiator and a solvent, wherein the alkali-soluble resin is a copolymer comprising structural units represented by Formulae 1, 2 and 3: wherein R 1 and R 2 are each independently a hydrogen atom or a C 1 -C 6 alkyl group and n represents the weight ratio of the structural unit to the copolymer; wherein R 1 and R 2 are each independently a hydrogen atom or a C 1 -C 6 alkyl group, R 3 is selected from C 1 -C 12 alkyl, hydroxyalkyl, amide- or urea-containing alkyl, alkenyl, C 5 -C 12 cycloalkyl which is optionally substituted with a group selected from methyl or C 1 -C 4 oxyalkyl, aromatic hydrocarbon and polycyclic alkyl groups, and n represents the weight ratio of the structural unit to the copolymer; and wherein R 1 and R 2 are each independently a hydrogen atom or a C 1 -C 6 alkyl group, R 4 is a linear dienic polymer having unsaturated double bonds, and n represents the weight ratio of the structural unit to the copolymer.