Patent ID: 6306555
Filing Date: 2001-10-23
Classification: B33Y,C07C,C08G,G03F,Y10S

Abstract:
A radiation-sensitive composition comprising(a1) a cationically or acid-catalytically polymerisable or crosslinkable compound or(a2) a compound that increases its solubility in a developer under the action of acid; and(b) at least one diaryliodonium salt of formula I ##STR33##X is branched C.sub.3 -C.sub.20 alkyl or C.sub.3 -C.sub.8 cycloalkyl;X.sub.1 is hydrogen, linear C.sub.1 -C.sub.20 alkyl, branched C.sub.3 -C.sub.20 alkyl or C.sub.3 -C.sub.8 cycloalkyl;with the proviso that the sum of the carbon atoms in X and X.sub.1 is at least 4;Y is linear C.sub.1 -C.sub.10 alkyl, branched C.sub.3 -C.sub.10 alkyl or C.sub.3 -C.sub.8 cycloalkyl;A.sup.- is a non-nucleophilic anion, selected from the group (BF.sub.4).sup.-, (SbF.sub.6).sup.-, (PF.sub.6).sup.-, (B(C.sub.6 F.sub.5)).sub.4.sup.-, C.sub.1 -C.sub.20 alkylsulfonate, C.sub.2 -C.sub.20 haloalkylsulfonate, unsubstituted C.sub.6 -C.sub.10 arylsulfonate, camphorsulfonate, C.sub.1 -C.sub.20 -perfluoroalkylsulfonylmethide, C.sub.1 -C.sub.20 -perfluoroalkylsulfonylimide, and C.sub.6 -C.sub.10 arylsulfonate substituted by halogen, NO.sub.2, C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 halo-alkyl, C.sub.1 -C.sub.12 alkoxy or by COOR.sub.1 ; andR.sub.1 is C.sub.1 -C.sub.20 alkyl, phenyl, benzyl; or phenyl mono- or poly-substituted by C.sub.1 -C.sub.12 alkyl, C.sub.1 -C.sub.12 alkoxy or by halogen;with the proviso that the two phenyl rings on the iodine atom are not identically substituted.