Alkali-developing type photocurable composition and calcined pattern

Abstract

Disclosed are a photocurable composition which is developable with an aqueous alkaline solution and such calcined patterns as a conductor pattern, a vitreous dielectric pattern, and a fluorescent pattern which are obtained by the use of the photocurable composition. The photocurable composition comprises (A) an alkali-soluble macromolecular binder having a weight-average molecular weight in the range of 5,000 to 100,000 and an acid value in the range of 50 to 150 mg KOH/g and obtained by causing (c) an organic acid possessing one carboxyl group and no ethylenically unsaturated bond in its molecule to react with the glycidyl group of a copolymer of (a) a compound possessing an ethylenically unsaturated bond and possessing neither hydroxyl group nor acidic group and (b) glycidyl (meth)acrylate and then causing (d) a polybasic acid anhydride to react with the resultant secondary hydroxyl group, (B) an inorganic powder, (C) a photopolymerizable monomer, (D) a photopolymerization initiator, and (E) an organic solvent. The composition may be in the form of paste or in the form of a dry film. When the photocurable composition is in the form of paste, the paste is applied to a substrate and then dried to form a film. When the photocurable composition is in the form of a dry film, the film is laminated on the substrate. A calcined pattern of high fineness is obtained by patterning the superposed layer of the composition by selective exposure to light and development, and thereafter calcining the patterned film.