To provide a phosphorus-containing compound capable of securing sufficient flame retardance without using a halogen-based flame retardant, obtaining a sufficient resolution by alkaline developing liquid, without having the discoloration of surface and blisters at the boundary of copper and a resin on a wiring board in the PCT test, and also sufficiently reducing the problem of bleeding out, a resin composition containing the phosphorus-containing compound, a photosensitive film using the resin composition, a method for forming a resist pattern and a printed wiring board.
This phosphorus-containing compound contains a resin having a repetition unit expressed by a specific chemical formula, (B) a photopolymerizable compound having an ethylene non-saturated group, and (C) a resin compound containing a polymer initiator.
ARIGA SHIGEHARU
MORITA MASAKI
HATAKEYAMA SHUICHI
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