Patent ID: 8729148

Claim:
A photocurable dry film comprising a structure having a 10 to 100 μm thick photocurable resin layer sandwiched between a support film and a protective film wherein the photocurable resin layer has a viscosity coefficient of 10 to 5,000 Pa·s at a temperature of 80 to 120° C., the photocurable resin layer being made of a photocurable resin composition comprising the following ingredients (A) to (D): (A) a silicone skeleton-containing polymer compound having repeating units represented by the following general formula (1) and a weight average molecular weight of 3,000 to 500,000 wherein R 1 to R 4 may be the same or different and represent a monovalent hydrocarbon group having 1 to 8 carbon atoms, m is an integer of 1 to 100, a, b, c and d are, respectively, 0 or a positive number provided that c and/or d is a positive number and a+b+c+d=1, X is a divalent organic group represented by the following general formula (2) wherein Z represents a divalent organic group selected from the following groups n is 0 or 1, R 5 and R 6 are, respectively, an alkyl group or alkoxy group having 1 to 4 carbon atoms and may be the same or different, and k is 0, 1 or 2, and Y is a divalent organic group represented by the following general formula (3) wherein V represents a divalent organic group selected from the following groups p is 0 or 1, R 7 and R 8 , respectively, represent an alkyl group or alkoxy group having 1 to 4 carbon atoms and may be the same or different, and h is 0, 1 or 2; (B) at least one crosslinking agent selected from formalin-modified or formalin-alcohol-modified amino condensates and phenolic compounds having, on average, two or more methylol groups or alkoxymethylol groups in one molecule; (C) a photoacid generator capable of generating an acid by decomposition with light having a wavelength of 190 to 500 nm; and (D) a solvent.