PHOTOSENSITIVE COMPOSITION, IMAGE-FORMING BASE MATERIAL, IMAGE-FORMING MATERIAL, AND IMAGE-FORMING METHOD

摘要

Disclosed is a photosensitive composition which is highly sensitive to laser light, particularly to laser light from ultraviolet to blue-violet, and is excellent in long-term storage stability and adhesion to a substrate. The photosensitive composition is suitably used as a solder resist or a dry film, and in particular it is suitable for direct drawing wherein laser light from ultraviolet to blue-violet is used. Also disclosed are an image-forming base material using such a photosensitive composition, an image-forming material and an image-forming method. Specifically disclosed is a photosensitive composition containing an ethylenically unsaturated group-containing compound (A), a photopolymerization initiator (B) and an alkali-soluble resin (C) which is characterized in that the photopolymerization initiator (B) contains a photopolymerization initiator having a specific structure and an average particle diameter of not less than 0.001 mum and not more than 150 mum.