Patent ID: 8338078

Claim:
A photoresist undercoat-forming material comprising a novolac resin having an aromatic hydrocarbon group of 6 to 30 carbon atoms substituted with a sulfo group or an amine salt thereof; wherein said novolac resin has the general formula (1): wherein X is hydrogen, an amine compound having hydrogen added thereto, or quaternary ammonium, R 1 is a single bond or a straight or branched C 1 -C 6 alkylene group, the circle stands for an aromatic hydrocarbon group of 6 to 30 carbon atoms, R2 is selected from the group consisting of hydrogen, straight, branched or cyclic C 1 -C 20 alkyl, C 6 -C 20 aryl, C 2 -C 20 alkenyl, straight, branched or cyclic C 1 -C 20 alkoxy, amino, and hydroxyl groups, m is an integer of 1 to 4, and n is an integer of 1 to 3, and wherein said novolac resin further comprises recurring units derived from a compound having a non-conjugated double bond and free of a phenolic hydroxyl group.