Patent ID: 6280900
Filing Date: 2001-08-28
Classification: G03F,Y10S

Abstract:
A radiation-sensitive resin composition comprising:(a) the following copolymer (a-1) or copolymer (a-2), or a mixture of the copolymer (a-1) and copolymer (a-2):copolymer (a-1): a copolymer (I) which comprises a recurring unit shown by the following formula (1) and a recurring unit shown by the following formula (2), ##STR14##wherein R.sup.1 represents a hydrogen atom or a methyl group, ##STR15##wherein R.sup.2 represents a hydrogen atom or a methyl group, and R.sup.3 represents a t-butyl group or a group shown by the following formula (3), ##STR16##wherein R.sup.4 and R.sup.5 individually represent a hydrogen atom, a linear or branched alkyl group having 1-6 carbon atoms, or a 5-8 membered cyclic alkyl group; or R.sup.4 and R.sup.5 forma 5-8 membered carbon cyclic structure in combination together with the carbon atom of the formula (3), and R.sup.6 and R.sup.7 individually represent a hydrogen atom, a linear or branched alkyl group having 1-6 carbon atoms, or a 5-8 membered cyclic alkyl group, or R.sup.6 and R.sup.7 form a 5-8 membered carbon cyclic structure in combination with the carbon atom of the formula (3);copolymer (a-2): a copolymer (II) which comprises a recurring unit shown by the above formula (1) and a recurring unit shown by the following formula (4), ##STR17##wherein R.sup.8 represents a hydrogen atom or a methyl group, and R.sup.9 represents a tertiary alkyl group having 4-10 carbon atoms;(b) a photoacid generator; and(c) a compound shown by the following formula (5), ##STR18##wherein R.sup.10, R.sup.11, R.sup.12, and R.sup.13 individually represent a linear, branched, or cyclic alkyl group having 1-16 carbon atoms, a linear, branched, or cyclic alkenyl group having 2-16 carbon atoms, an aryl group having 6-15 carbon atoms, or an aralkyl group having 7-12 carbon atoms; or two of R.sup.10, R.sup.11, R.sup.12, and R.sup.13 form a 5-8 membered heterocyclic structure in combination with the nitrogen atom of the formula (5), and the other two individually represent a linear, branched, or cyclic alkyl group having 1-16 carbon atoms, a linear, branched, or cyclic alkenyl group having 2-16 carbon atoms, an aryl group having 6-15 carbon atoms or an aralkyl group having 7-12 carbon atoms; and R.sup.14 represents a monovalent hydrocarbon group having 5-16 carbon atoms, an acyl group or carboxyl group having 2-16 carbon atoms, or a group in which a monovalent hydrocarbon group having 1-16 carbon atoms is replaced by a carboxyl group.