PHOTOSENSITIVE COMPOSITION, PHOTOSENSITIVE FILM, PHOTOSENSITIVE LAMINATE, PERMANENT PATTERN FORMING METHOD, AND PRINTED BOARD

摘要

This photosensitive composition contains at least an ethylenically unsaturated group-containing polyurethane resin, a polymerizable compound, a photopolymerization initiator and a thermal crosslinking agent. The ethylenically unsaturated group-containing polyurethane resin has an ethylenically unsaturated group equivalent weight of from 1.2 mmol/g to 1.5 mmol/g (inclusive) and a mass composition ratio of aromatic groups of 30% by mass or more. The thermal crosslinking agent contains at least one compound selected from among epoxy compounds, oxethane compounds, compounds that are obtained by having a blocking agent react with isocyanate compounds, and melamine derivatives. The ethylenically unsaturated group-containing polyurethane resin contains a structural unit that is represented by general formula (I).