EPOXY RESIN COMPOSITION, METAL FOIL WITH RESIN, AND INSULATING FILM

摘要

PROBLEM TO BE SOLVED: To obtain an epoxy resin composition scarcely causing cracking or peeling, etc., in a semicured state (B stage) and without making a resin residue remain in a cured state even when via holes are formed by carrying out perforation with laser beams. SOLUTION: This epoxy resin composition consists essentially of a novolak type epoxy resin and a cross-linked rubber having <=1μm particle diameter. The amount of the novolak type epoxy resin contained therein is 20-80 pts.mass based on 100 pts.mass of the solid content.