Patent ID: 7358025

Claim:
A photoresist undercoat-forming material comprising a bisphenol compound having the general formula (1): 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, and Z is a divalent C 13 -C 30 hydrocarbon group containing an aromatic skeleton or fused polycyclic hydrocarbon group, which may contain at least one hetero atom.