Patent ID: 6309793
Filing Date: 2001-10-30
Classification: C08F,G03F,Y10S

Abstract:
A photoresist composition comprising:(a) an acetal derivatized polymer having the following monomer units; ##STR13##wherein R is a hydrogen, alkyl, alkoxy or acetoxy; R.sub.1 is a linear, branched or cyclic alkyl group, a linear, branched or cyclic haloalkyl group, an aralkyl group, or a substituted phenylmethylene having the general structure ##STR14##wherein each R.sub.9 and R.sub.10 are the same or independently a hydrogen or an alkyl group having 1 to 6 carbons; R.sub.2 is a linear, branched or cyclic alkyl group, a linear, branched or cyclic halogenated alkyl group, an aromatic group, or a substituted phenylmethylene having the general structure ##STR15##wherein R.sub.9 and R.sub.10 are as defined above; R.sub.1 and R.sub.2 are different from each other; R.sub.3 is a hydrogen atom, methyl or ethyl group, or a group having the formula --CH.sub.2 --COOR.sub.8 ; R.sub.4 and R.sub.8 are the same or independently a linear, branched or cyclic alkyl group, a linear, branched or cyclic halogenated alkyl group, an aromatic group or a linear or cyclic .alpha.-alkoxyalkyl group; R.sub.5 is a valence bond or methylene; R.sub.6 and R.sub.7 are the same or independently a hydrogen, a linear, branched or cyclic alkyl group, a linear, branched or cyclic haloalkyl group, an aryl group, an aralkyl group or a substituted haloaryl, alkoxyaryl or alkylaryl group, or a combination of R.sub.6 and R.sub.7 being able to form an alkylene chain, an alkyl substituted alkylene chain, or an oxyalkylene chain; R.sub.11 is hydrogen or methyl; 0<a.ltoreq.0.6; 0<b.ltoreq.0.6; f=0 to 0.10; 0<a+b+f.ltoreq.0.6; 0.4.ltoreq.c+d+e<1.0; and a+b+c+d+e+f=1.0 and where all numbers represent mole fractions;(b) a photoacid generator compound; and(c) a solvent capable of dissolving components (a) and (b).