abstract |
The curable resin composition contains a carboxyl group-containing resin, a titanium oxide, and a phosphinic acid metal salt in order to be able to form a highly reflective white coating layer that is halogen free and can achieve flame retardancy and is excellent in resolution and low warpage. And suitably, it further contains a thermosetting resin. It is preferable that the said carboxyl group-containing resin is carboxylic acid resin which has a urethane skeleton. By using such a curable resin composition and its dry film, the printed wiring board in which flame-retardant coatings, such as a soldering resist, are formed by these can be provided. |