abstract |
[PROBLEMS] To provide a curable resin composition capable of forming a highly reflective white coating layer that is halogen-free and can achieve flame retardancy, and is excellent in resolution and low warpage, and a dry film and a cured product thereof. The printed wiring board by which flame-retardant films, such as a soldering resist, are formed is provided. A curable resin composition contains a carboxyl group-containing resin, titanium oxide, and a phosphinic acid metal salt. Preferably, the curable resin composition further includes a thermosetting resin. The carboxyl group-containing resin is preferably a carboxylic acid resin having a urethane skeleton. [Selection figure] None |