Patent ID: 6656660
Filing Date: 2003-12-02
Classification: G03F,Y10S

Abstract:
A chemically amplified resist composition comprising(a) two or more polymers which become alkali-soluble by an action of an acid and represented by the formula: wherein R1 and R2 are independently a hydrogen atom or a methyl group; R3 and R4 are independently a hydrogen atom, a straight-chain, branched or cyclic alkyl group having 1 to 6 carbon atoms, a straight-chain, branched or cyclic haloalkyl group having 1 to 6 carbon atoms, a phenyl group which may have one or more substituents, or R3 and R4 can together form a methylene chain, provided that both R3 and R4 cannot be hydrogen atoms at the same time; R5 is a straight-chain, branched or cyclic alkyl group having 1 to 10 carbon atoms, a straight-chain, branched or cyclic haloalkyl group having 1 to 10 carbon atoms, or an aralkyl group;R6 is a hydrogen atom, a straight-chain or branched alkyl group having 1 to 4 carbon atoms, a straight-chain, branched or cyclic alkoxy group having 1 to 8 carbon atoms, a saturated heterocyclic oxy group, or a group of the formula: wherein R7 is a straight-chain, branched or cyclic alkyl group having 1 to 8 carbon atoms, an aryl group or a saturated heterocyclic group; X is a direct link; l is zero or an integer; k is zero or an integer; provided that 0.10&lE;(m+k)/(m+n+k)&lE;0.90 and 0&lE;k/(m+n+k)&lE;0.25,(b) a mixture of at least one compound of the formula: wherein R8 is a branched or cyclic alkyl group having 3 to 8 carbon atoms; and R9 is a straight-chain, branched or cyclic alkyl group having 1 to 8 carbon atoms, or an aralkyl group, andat least one compound selected from the group consisting of a compound of the formula: wherein R10, R11 and R12 are independently a hydrogen atom, a halogen atom, a straight-chain, branched or cyclic alkyl group having 1 to 6 carbon atoms, a straight-chain, branched or cyclic alkoxy group having 1 to 6 carbon atoms, or a phenylthio group: R13 is a 1-naphthyl group, a 2-naphthyl group, a 10-camphoryl group, a pyridyl group, or a group of the formula: wherein R14 and R15 are independently a hydrogen atom or a halogen atom; and R16 is a hydrogen atom, a halogen atom, a straight-chain, branched or cyclic alkyl group having 1 to 12 carbon atoms, a straight-chain or branched alkoxy group having 1 to 4 carbon atoms, anda compound of the formula: wherein R17 and R18 are independently a hydrogen atom, a straight-chain or branched alkyl group having 1 to 4 carbon atoms, a straight-chain or branched alkoxy group having 1 to 4 carbon atoms; and R19 is a 1-naphthyl group, a 2-naphthyl group, a 10-camphoryl group, a phenyl group, or a phenyl group substituted with one or more, the same or different, straight-chain, branched or cyclic alkyl groups having 1 to 12 carbon atoms, and(c) a solvent dissolving the components (a) and (b), wherein the component (c) is a mixed solvent containing a compound having a lactone ring.