Patent ID: 6737214
Filing Date: 2004-05-18
Classification: G03F,Y10S

Abstract:
A chemical amplification type resist composition comprising a polymeric mixture of a polymer comprising recurring units of the general formula (1) and having a weight average molecular weight of 1,000 to 500,000 and a polymer comprising recurring units of the general formula (2) and having a weight average molecular weight of 1,000 to 500,000, wherein R is a hydroxyl group or a OR3 group, R1 is hydrogen or methyl, R2 is a straight, branched or cyclic alkyl group of 1 to 8 carbon atoms, R3 is a group of the following formula (3): wherein, R12 and R13 are independently hydrogen or straight, branched or cyclic alkyl groups of 1 to 18 carbon atoms, R14 is a monovalent hydrocarbon group of 1 to 18 carbon atoms which optionally has a hetero atom and optionally has one or more hydrogen atoms replaced by hydroxyl, alkoxy, oxo, amino or alkylamino groups, alternatively, a pair of R12 and R13, a pair of R12 and R14, or a pair of R13 and R14, taken together, form a ring in which the pair together is a straight or branched alkylene group of 1 to 18 carbon atoms, R4 is an acid labile group, R5 is methyl or ethyl, Z is a straight, branched or cyclic alkylene group of 1 to 10 carbon atoms, x is 0 or a positive integer, y is a positive integer, satisfying x+y &lE;5, m is 0 or a positive integer, n is a positive integer, satisfying m+n &lE;5, q is a positive number, p, r and s each are 0 or a positive number, satisfying p+q+r+s=1, wherein R6, R7 and R8 each are hydrogen or methyl, R9 is methyl or ethyl, E is a straight, branched or cyclic alkylene group of 1 to 10 carbon atoms, R10 a straight, branched or cyclic alkyl group of 1 to 20 carbon atoms, which may contain an oxygen or sulfur atom, provided that R10 is not a tertiary alkyl group. R11 is a tertiary alkyl group of 1 to 20 carbon atoms, k is 0 or a positive integer of up to 5, t and w each are a positive number, u and v each are 0 or a positive number, either one of u and v is not equal to 0, satisfying t+u+v+w=1.