Abstract: Radiation-sensitive compositions comprising a substance which forms acid under the action of actinic radiation and polymers based on combination of different repeating units derived from hydroxy styrene and hydroxy-vinylcyclohexane derivatives wherein a portion of the hydroxyl groups are replaced with either acid-labile acetal or ketal protecting groups and where a portion of the repeating groups comprise two crosslinked species connected via the protecting groups.

Abstract: The invention relates to the use of oxime sulfonates of formula 1 ##STR1## wherein R is naphthyl, ##STR2## Ar is an unsubstituted aryl group or an aryl group which carries one or more than one substituent selected from the group consisting of nitro, chloro, bromo, hydroxyl, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 perfluoroalkyl, C.sub.1 -C.sub.4 alkoxy and acid degradable substituent;R.sub.0 is either a R.sub.1 -X group or R.sub.2 ;X is an oxygen or a sulfur atom;R.sub.1 is hydrogen, C.sub.1 -C.sub.4 alkyl or unsubstituted phenyl or phenyl which is substituted by a member selected from the group consisting of chloro, bromo, C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 alkoxy, andR.sub.2 is hydrogen, C.sub.1 -C.sub.

Abstract: Polymers based on combination of different repeating units derived from hydroxy styrene and hydroxyvinylcyclohexane derivatives wherein a portion of the hydroxyl groups are replaced with either acid-labile acetal or ketal protecting groups and where a portion of the repeating groups comprise two crosslinked species connected via the protecting groups.

Abstract: The invention relates to a chemically amplified negative photoresist which can be developed in aqueous alkaline media, which contains a radiation-sensitive acid generator and a compound which reduces the solubility of the resist in aqueous alkaline solutions in the presence of acid, and a polyhydroxyl compound of the formula I ##STR1## in which n is an integer between 2 and 6,R is hydrogen, halogen, C.sub.1 -C.sub.4 alkoxy or C.sub.1 -C.sub.4 alkyl, andZ is an n-valent radical which is unsubstituted or substituted by one or more substituents from the group consisting of hydroxyl, halogen and C.sub.1 -C.sub.4 alkoxy, and is selected from the group consisting of:a) aliphatic radicals having 1 to 12 carbon atoms,b) cycloaliphatic radicals having 5 to 20 carbon atoms,c) aromatic radicals having 6 to 20 carbon atoms andd) radicals having 7 to 30 carbon atoms which comprise at least two different structural units selected from aliphatic, cycloaliphatic or aromatic groups.

Abstract: The invention relates to the use of oxime sulfonates of formula 1 ##STR1## wherein R is naphthyl, ##STR2## Ar is an unsubstituted aryl group or an aryl group which carries one or more than one substituent selected from the group consisting of nitro, chloro, bromo, hydroxyl, C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 perfluoroalkyl, C.sub.1 -C.sub.4 alkoxy and acid degradable substituents;R.sub.0 is either a R.sub.1 --X group or R.sub.2 ;X is an oxygen or a sulfur atom;R.sub.1 is hydrogen, C.sub.1 -C.sub.4 alkyl or unsubstituted phenyl or phenyl which is substituted by a member selected from the group consisting of chloro, bromo, C.sub.1 -C.sub.4 alkyl and C.sub.1 -C.sub.4 alkoxy, andR.sub.2 is hydrogen, C.sub.1 -C.sub.

Abstract: The invention relates to novel maleimide copolymers which, in addition to structural units derived from certain maleimide derivatives defined more precisely in the present patent application, comprises recurring structural units selected from the structural units of the formulae (Ia) and (Ib) ##STR1## where A is a direct single bond or a divalent group of the formula --O--;R.sub.0 and R.sub.1, independently of one another, are each a hydrogen atom, a C.sub.1 -C.sub.6 alkyl group or an aryl group having 6 to 14 ring carbon atoms;R.sub.2 is a radical of the formula ##STR2## in which R is a tert-alkyl radical having 4 to 19 carbon atoms,[T] is a C.sub.1 -C.sub.6 alkylene group or an arylene group having 6 to 14 ring carbon atoms, and p is the number 2, 3 or 4; orA together with R.sub.2 is a group of the formula ##STR3## and where, furthermore, R.sub.3 and R.sub.4, independently of one another, are each a hydrogen atom, a halogen atom, a C.sub.1 -C.sub.6 alkyl group or a C.sub.1 -C.sub.