Patent ID: 6051370
Filing Date: 2000-04-18
Classification: G03F,Y10S

Abstract:
A positive-working radiation-sensitive mixture consisting essentially of(a) a water-insoluble but alkali-soluble binder or binder mixture,(b) a compound which forms a strong acid on irradiation,(c) optionally up to 1% by weight of an additive selected from the group consisting of an adhesion promoter, a surfactant and a dye, based on the total amount of (a)+(b)+additive, and(d) optionally a sensitizer which absorbs UV-radiation and transfers it to component (b),wherein component (a) is a phenolic resin whose phenolic hydroxyl groups have been replaced to an extent of from 30 to 70% by ##STR9## wherein x is 2 or 3, wherein component (b) is a sulfonium salt of the formula (V) ##STR10## and R.sup..alpha., R.sup..beta. and R.sup..gamma. are identical or different and each is alkyl of from 1 to 3 carbon atoms, phenyl, halogen-substituted phenyl, C.sub.1 -C.sub.4 -alkyl-substituted phenyl, or 4-hydroxy-substituted phenyl,X.sup.- is ClO.sub.4.sup.-, AsF.sub.6.sup.-, SbF.sub.6.sup.-, PF.sub.6.sup.-, BF.sub.4.sup.-, or CF.sub.3 SO.sub.3.sup.-.