| abstract |
Epoxy resin compositions, which comprise (A) en epoxy resin having two or more epoxy groups in a molecule; (B) a phenol type curing agent where an average hydroxyl group content in a molecule (a mean value of (the total number of hydroxyl groups)/(the total number of benzene rings)), P, satisfies the equation 0<P<1; (C) a phenoxy resin; and (D) rubber particles, are suitable for use as an insulating layer of a multi-layered printed board in which, in spite of the fact that the roughness of a roughened surface after a roughening treatment is relatively small, an insulating layer having a good tight adhesion with a conductor layer formed by plating is able to be easily introduced into a multi-layered printed board. |