Patent ID: 7141355

Claim:
A radiation-sensitive resin composition, comprising: (A) an alkali-soluble resin having an unsaturated group, (B) a compound having at least one ethylenically unsaturated double bond, and (C) a radiation-induced radical polymerization initiator, wherein: the alkali-soluble resin having an unsaturated group (A) is obtained by reacting: (I) 100 parts by weight of a copolymer having a carboxyl group comprising 1 to 40 wt % structural units having a carboxyl group which are derived from (a) a radically polymerizable compound having a carboxyl group, and 1 to 50 wt % structural units having a phenolic hydroxyl group which are derived from (b-1) a radically polymerizable compound having a phenolic hydroxyl group or (b-2) a radically polymerizable compound having a functional group convertible into a phenolic hydroxyl group after the copolymerization, other structural units of said copolymer being derived from (c) a radically polymerizable compound other than the compounds (a), (b-1), (b-2) and the following compound (d); with (II) 0.1 to 5 parts by weight of(d) a radically polymerizable compound having an epoxy group which is selected from the group consisting of glycidyl (meth)acrylate, glycidyl α-ethyl (meth)acrylate, glycidyl α-n-propyl (meth)acrylate, glycidyl α-n-butyl (meth)acrylate, 3,4-epoxybutyl (meth)acrylate, 6,7-epoxyheptyl (meth)acrylate and cyclohexene oxide (meth)acrylate.