Patent ID: 6156481
Filing Date: 2000-12-05
Classification: G03F,Y10S

Abstract:
A positive resist composition comprising a polymer comprising recurring units of the following general formula (1) and having a weight average molecular weight of 1,000 to 500,000, ##STR8## wherein R.sup.1 is hydrogen or methyl, R.sup.2 is an acid labile group, R.sup.3, R.sup.4, R.sup.6, and R.sup.7 are independently hydrogen or straight or branched alkyl groups of 1 to 6 carbon atoms, R.sup.5 is a straight, branched or cyclic alkylene, alkylene ether, cyclohexylene or arylene group of 1 to 10 carbon atoms, R.sup.8 is hydrogen, methyl, phenyl or cyano group, R.sup.9 is hydrogen or a substituted or unsubstituted, straight, branched or cyclic alkyl group of 1 to 10 carbon atoms wherein the substituent is vinyl, acetyl, phenyl or cyano, p, r and s are positive numbers and q is 0 or a positive number, satisfying 0<p/(p+q+r+s).ltoreq.0.8,0.ltoreq.q/(p+q+r+s).ltoreq.0.8, and 0<s/(p+q+r+s).ltoreq.0.9, zl is an integer of 1 to 3, z2 is an integer of 0 to 3, and the units may be of one or more types.