Patent ID: 6207347
Filing Date: 2001-03-27
Classification: G03F

Abstract:
A negative-acting photoimageable composition comprisingA) between about 30 and about 80 wt % based on the total weight of A) plus B) of a binder polymer having acid functionality sufficient to render said photoimageable composition developable in alkaline aqueous solution,B) between about 20 and about 70 wt % based on the total weight of A) plus B) of an addition-polymerizable, non-gaseous .alpha.,.beta.-ethylenically unsaturated compound(s) capable of forming a high polymer by free-radical initiated chain-propagating addition polymerization, said component B comprising between about 1 and about 70 wt %, based on total of A) plus B) of a urethane biuret oligomer having the formula:R--CO--NH--Z--N--(CO--NH--Z--NH--CO--R).sub.2where the R's are the same or different and have the general formula:--A.sub.m --[--CO--NH--Z--NH--CO--].sub.s --A.sub.p --O--CO--CY.dbd.CH.sub.2,where m=6-20, p=0-20, s=0-1; the A's are the same or different and are selected from the group consisting of--[O--CHY--CHY--]--,where the Y's are the same or different and are selected from the group consisting of H, CH.sub.3, or C.sub.2 H.sub.5,--[O--(CH2)3-4--]--,--[--O--(CH2)3-5--CO--]--and mixtures thereof; and Z is a divalent alkyl, cycloalkyl, aromatic, or alkylaromatic hydrocarbon moiety; and(C) a photoinitiator chemical system.