Patent ID: 8647810

Claim:
A resist lower layer film-forming composition comprising: (A) a polymer including: a structural unit (I) shown by a formula (1); and a structural unit (II) shown by a formula (2); and (B) a crosslinking agent including at least two crosslinkable functional groups, wherein R 1 represents a hydrogen atom, a halogen atom, a methyl group, or a trifluoromethyl group, Q 1 represents a divalent linking group, Y represents a single bond, a methylene group, a linear or branched alkylene group having 2 to 10 carbon atoms, an arylene group having 6 to 20 carbon atoms, a 6 to 20-membered heteroarylene group, or a combination thereof, provided that some or all of the hydrogen atoms of the alkylene group, the arylene group, or the heteroarylene group may be substituted with a substituent, and the alkylene group may include an oxygen atom in its carbon chain, p is an integer from 0 to 3, q is 0 or 1, r is an integer from 0 to 2, and X represents —CH 2 —, —CH, —CH 2 —, —O—, —S—, or —SO 2 —, provided that a plurality of X may be either the same or different when r is 2, wherein R 2 represents a hydrogen atom, a halogen atom, a methyl group, or a trifluoromethyl group, Q 2 represents a divalent linking group, R 3 represents an aryl group having 6 to 20 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, or a 6 to 20-membered heteroaryl group, provided that some or all of the hydrogen atoms of the aryl group, the aralkyl group, or the heteroaryl group may be substituted with a substituent.