INSULATING COMPOSITE BODY, METHOD FOR PRODUCING THE SAME, AND USE OF INSULATING COMPOSITE BODY

摘要

Disclosed is an insulating composite body which is obtained by applying a varnish (1) having a composition for forming a cured product excellent in fine wiring pattern formability over one side of a fiber base and applying a varnish (2) having a composition for forming a cured product excellent in characteristics such as flame retardancy and containing a polymer of a specific molecular weight over the other side of the fiber base, and then removing the organic solvent therefrom and forming thermosetting compositions supported by the fiber base. This insulating composite body is excellent in flame retardancy, electrical insulation and crack resistance, and suitable for production of a multilayer circuit board having a fine wiring pattern.