Patent ID: 7687224

Claim:
A photosensitive film which comprises a support film (A), a photosensitive resin composition-containing photosensitive resin layer (B) formed on said support film (A), and a protecting film (C) stuck onto said photosensitive resin layer (B), wherein the number of fish eyes having a diameter of 80 μm or more included in said protecting film (C) is zero; and said photosensitive resin composition-containing photosensitive resin layer (B) has a film thickness of 5 to 30 μm, and wherein said photosensitive resin composition used in said photosensitive resin composition-containing photosensitive resin layer (B) comprises: (a) a binder polymer obtained by copolymerizing acrylic acid or methacrylic acid and alkyl esters thereof as constituent monomers; (b) a monomer having at least one polymerizable ethylenically unsaturated group in the molecule thereof; and (c) a photopolymerization initiator, said binder polymer (a) having a weight-average molecular weight of from 20,000 to 300,000, and said photosensitive resin composition comprises component (a) in an amount of from 40 to 60 parts by weight per 100 parts by weight of the sum of components (a) and (b).