Patent ID: 7476485

Claim:
A substrate for a multilayer-resist film used in lithography, wherein, at least, a resist lower layer film which functions as an antireflection film is formed on a substrate using a resist lower layer film material which is comprised of a polymer having a repeating unit represented by the following general formula (1), or a resist lower layer film material which is comprised of a polymer having a repeating unit represented by the following general formula (1) blended with any one of polymers of vinyl alcohol, vinyl ether, allyl-ethers, a styrene derivative, an allyl-benzene derivative and olefins, or blended with a polymer by metathesis ring opening polymerization, wherein R 1 -R 4 independently represent any one of a hydrogen atom, a hydroxyl group, an alkyl group having 1-10 carbon atoms, an alkoxy group having 1-10 carbon atoms, an alkoxy carbonyl group having 1-10 carbon atoms, a carboxyl group having 1-10 carbon atoms, an aryl group having 6-10 carbon atoms, a hydroxy alkyl group having 1-10 carbon atoms, an isocyanate group and a glycidyl ether group, or a monovalent organic group represented by the following general formula wherein R 5 and R 6 independently represent a hydrogen atom, an alkyl group having 1-30 carbon atoms, an acyl group, an aryl group having 2-20 carbon atoms, or a heterocyclic group having 3-6 carbon atoms, and R 7 is a hydrogen atom or a methyl group; Z is any one of dicyclopentadiene, bicyclo(4,3,0) nona-3,7-diene, 4-vinyl cyclohexene, norbornadiene, 5-vinyl-norborna-2-en, α-pinene, β-pinene, and limonene; a and b are positive numbers; and one or more layers of a resist upper layer film of a photoresist composition are formed on the lower layer film to form a multilayer-resist film.