Patent ID: 8481247

Claim:
A resist underlayer film forming composition comprising: a resin (A); a liquid additive (B) being liquid at a temperature from 20° C. to about 270° C.; and a solvent (C), wherein the resin (A) is a compound having a protected carboxyl group and a compound having a group reactable with a carboxyl group, or a compound having a protected carboxyl group and a group reactable with a carboxyl group, and the liquid additive (B) is a polyether polyol represented by Formula (1): where: n represents an integer of 1 to 300; m represents an integer of 2 to 6; R 1 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atom(s); and R 2 represents an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an alkynyl group having 2 to 10 carbon atoms, an alkylcarbonyl group having 2 to 10 carbon atoms, an alkylcarbonylamino group having 2 to 10 carbon atoms, an alkyloxyalkyl group having 2 to 10 carbon atoms, an alkylamino group having 1 to 10 carbon atoms, an alkyldiamino group having 1 to 10 carbon atoms, or a combination thereof, R 2 being an organic group capable of having a valence number of 2 to 6 according to the number m of polyoxyalkylene groups.