Process of impregnating substrate and impregnated substrate

摘要

Impregnation of a substrate in the form of a layer having openings comprises keeping one of the substrate surfaces and a resin composition in contact. The resin composition is in liquid form. Also claimed is (1) a substrate which consists of a portion of the resin composition impregnated in it, (2) a prepreg produced by heating to dry and/or cure a substrate having resin impregnated in it, and (3) a laminate comprising at least one substrate and at least one metal layer laminated together.