摘要:
A negative-acting photoimageable composition useful as a photoresist comprises an acid-functional binder, a photopolymerizable component, a photoinitiator chemical system comprising 9-phenyl acridine or a homologue thereof, and a dibenzoate plasticizer.
摘要:
An alkaline aqueous developing solution for developing photoresists or the like contains, as an anti-scum agent, an ethoxylated surfactant having the general formula:R--�O--(AO).sub.n !.sub.m --X (I)where AO are alkylene oxide units selected from ethylene oxide units (CH.sub.2 --CH.sub.2 --O) and propylene oxide units (CH(CH.sub.3)--CH.sub.2 --O) or (CH.sub.2 --CH(CH.sub.3)--O), where R is a hydrophobic group, X is H or an anionic group, m is from 1 to 3, and n is at least about 8, and the molar ratio of total ethylene oxide units to total propylene oxide units is between about 1:4 and about 4:1, preferably between about 2:3 and about 3:2.
摘要:
A waterborne photoimageable composition or photoresist comprises a latex binder polymer having acid acid functionality to render it developable in alkaline aqueous solution, at least about 50 mole percent of the acid functionality being sulfonic acid moieties, a photopolymerizeable monomer fraction, and a photoinitiator chemical system.