| abstract |
The invention provides a photocurable resin composition, dry film, cured substance and printed circuit board. The invention provides a photocurable resin composition which is fully coloured, has high photosensitivity under the exposure of ultraviolet ray and laser such that it has good curing depth, in the mean time, adjusting absorption in the ultraviolet region by using red or yellow colorant as well as oxime ester initiators. The photocurable resin composition which may develop through alkaline aqueous solution contains (A) carboxylic acid-containing resins, (B) red colorants, (C) oxime ester initiators and (D) compounds having more than two unsaturated alkene groups in the molecules. |