Patent ID: 6262222
Filing Date: 2001-07-17
Classification: C08F,G03F

Abstract:
A chemical amplification photoresist comprising a copolymer containing N-vinyllactam derivatives, represented by the following general formula I: ##STR4##wherein,R.sub.1 is hydrogen, an alkyl group containing 1 to 10 carbon atoms, an aryl group containing 6 to 12 carbon atoms or a trialkylsilyl group containing 3 to 9 carbon atoms;R.sub.2 and R.sub.3 independently represent hydrogen, an alkyl group containing 1 to 10 carbon atoms, an aryl group containing 6 to 12 carbon atoms, a trialkylsilyl group containing 3 to 9 carbon atoms, --OR', --SO.sub.3 R', --CO.sub.2 R', PO.sub.3 R', SO.sub.2 R' or PO.sub.2 R' wherein R' is an alkyl group containing 1 to 10 carbon atoms, cycloalkyl, a cyclic group containing a heteroatom such as N, O, P, and S, or an aryl group containing 6 to 12 carbon atoms;R.sub.4 and R.sub.5 independently represent --OH, --OR wherein R is an alkyl group containing 1 to 10 carbon atoms or an aryl group containing 6 to 12 carbon atoms, or the same with R.sub.1 ;R.sub.7 and R.sub.9 independently represent hydrogen, an alkyl group containing 1 to 10 carbon atoms, an aryl group containing 6 to 12 carbon atoms, or a trialkylsilyl group containing 3 to 9 carbon atoms;R.sub.6 and R.sub.8 independently represent an aryl group containing 6 to 20 carbon atoms or an acrylate --COOR"" (wherein R"" is an alkyl group containing 1 to 10 carbon atoms or an aryl group containing 6 to 12 carbon atoms);m is an integer of 0 to 10;j is a molar ratio ranging from 0.005 to 0.7; andk and l, which may be the same or different, each have a molar ratio ranging from 0.05 to 0.9.