Patent ID: 6914200

Claim:
A multilayer wiring board assembly laminated with a plurality of multilayer wiring board assembly components, being manufactured by a method comprising: preparing a plurality of multilayer wiring board assembly components comprising; a resin film having adhesivity, a copper foil bonded to one surface of the resin film, a through hole opened through the copper foil and the resin film, and a conductive paste embedded in the through hole so as to have a projection projected outward from the resin film; and laminating the multilayer wiring board assembly components with the other of the multilayer wiring board assembly components such that the projection of the conductive paste is pressed against the conductive paste or the copper foil of an adjacent one of the multilayer wiring board assembly components, all of the copper foil and the conductive paste are filled in the resin film, wherein the projection of the conductive paste is in close contact with the conductive paste or the copper foil of the adjacent one of the multilayer wiring board assembly components in order to make the electric connection having good electric connectivity.