Patent ID: 7632624

Claim:
A photoresist undercoat-forming material comprising a resin comprising recurring units derived by novolac formation of a bisphenol compound selected from the group consisting of the following formulae: wherein R 1 and R 2 are each independently hydrogen, a straight, branched or cyclic C 1 -C 10 alkyl group, C 6 -C 10 aryl group or C 2 -C 10 alkenyl group, R 3 and R 4 are each independently hydrogen, a straight, branched or cyclic C 1 -C 6 alkyl group, straight, branched or cyclic C 2 -C 6 alkenyl group, C 6 -C 10 aryl group, C 2 -C 6 acetal group, C 2 -C 6 acyl group or glycidyl group.