Patent ID: 6042989
Filing Date: 2000-03-28
Classification: C08F,G03F

Abstract:
A radiation sensitive composition comprising(a) a terpolymer containing 20-70 mole percent of repeating structural units of formula (I) and 3 to 40 mole percent of repeating structural units of the formula (II): ##STR10## as well as repeating units of formula (III): ##STR11## whereby A indicates a direct single bond or group of the formula: ##STR12## R.sub.1 indicates a hydrogen atom or a methyl group R.sub.2 indicates a 2-furanyloxy or 2-pyranyloxy group or a group of the formula: ##STR13## R.sub.3 indicates a group of the formulas:--COOH or --CN,R.sub.4 indicates a group selected from the groups of the formula: ##STR14## R.sub.5 indicates a C.sub.1 -C.sub.6 alkyl group or a phenyl group, R.sub.6 indicates a C.sub.1 -C.sub.6 alkyl group or a phenyl group,R.sub.7 indicates a C.sub.1 -C.sub.6 alkyl group or a phenyl group,Y indicates a hydrogen or a methyl group,Z indicates a group of the formula --OSi(CH.sub.3).sub.3,m indicates 1, 2 or 3, n indicates 3 minus m, andp indicates 0, 1, 2 or 3and wherebyas many structural units of formula (III) are contained in the terpolymer such that its silicon content amounts to 7-20 weight percent; and(b) a photoinitiator that forms acid under the effect of actinic radiation with a wavelength below 300 nm.