Patent ID: 6268106
Filing Date: 2001-07-31
Classification: G03F

Abstract:
A chemical amplification positive photoresist composition, comprising:a copolymer, ranging in polystyrene-reduced weight average molecular weight from 3,000 to 50,000 with a molecular weight distribution (M.sub.w /M.sub.n) of 1.0 to 2.0, represented by the following general formula I: ##STR25##wherein, R.sub.1 and R.sub.2 are independently selected from the group consisting of straight or branched alkyl groups, cyclic alkyl groups, polycyclic (bi, tri) alkyl groups, and alkoxyalkyl groups, all containing 1-10 carbon atoms; and l, m, n and o each are a repeating number not more than 0.5, satisfying the condition that l+m+n+o=1 and 0.4.ltoreq.o.ltoreq.0.5;at least one low molecular weight compound, represented by the following general formula VI: ##STR26##wherein R.sub.3 and R.sub.4 independently represent a hydrogen atom and a hydroxyl group; R.sub.5 is a low alkyl group, a bicyclo[2,2,1]heptane (norbornene)-containing alkyl group, adamantane-containing alkyl group or bicyclo[4,4,0]decane (decalin)-containing alkyl group;a photoacid generator; anda solvent.