Patent ID: 6482568
Filing Date: 2002-11-19
Classification: G03F,Y10S

Abstract:
A radiation-sensitive resin composition comprising:(A) a resin containing an acid-dissociable group which is insoluble or scarcely soluble in alkali and becomes alkali soluble when the acid-dissociable group dissociates, comprising the following recurring unit (I), recurring unit (II), and at least one of the recurring units (III-1) and (III-2); wherein A and B independently represent a hydrogen atom or a linear or branched alkyl group having 1-4 carbon atoms; X and Y independently represent a hydrogen atom, a monovalent oxygen-containing polar group, or a monovalent nitrogen-containing polar group, provided that at least one of X and Y represents a monovalent oxygen-containing polar group or a monovalent nitrogen-containing polar group, otherwise X and Y form a dicarboxylic anhydride group in combination; and n is an integer from 0 to 2; wherein R1 represents a hydrogen atom or a methyl group; and R2 represents a group shown by the following formula (a); wherein R3s individually represent a monovalent alicyclic hydrocarbon group having 4-20 carbon atoms, a derivative thereof, or a linear or branched alkyl group having 1-4 carbon atoms, provided that at least one of R3s is a monovalent alicyclic hydrocarbon group having 4-20 carbon atoms or a derivative thereof, or two of R3s form a divalent alicyclic hydrocarbon group having 4-20 carbon atoms or a derivative thereof in combination together with the carbon atom to which the two R3s bond, with the remaining R3 being a linear or branched alkyl group having 1-4 carbon atoms or a monovalent alicyclic hydrocarbon group having 4-20 carbon atoms or a derivative thereof; wherein R1 is the same as defined above and R4 represents a divalent hydrocarbon group having an alicyclic skeleton containing 3-15 carbon atoms; and(B) a photoacid generator.