| 摘要 |
PURPOSE:To enable a circuit to be connected with a base metallic board with high reliability, by disposing metallic foils on the top and bottom faces of a metallic board through resin layers to provide a metallic base circuit board having a through-hole circuit and electrically connecting the through-hole circuit with the metallic base. CONSTITUTION:An aperture is formed at a predetermined position in an aluminium board 1. After a copper foil 2 is disposed on one end of the aperture, the aperture is filled with epoxy resin containing a curing agent 3. A copper foil 5 is disposed on the top and bottom face of the resin-filled aluminium board while two sheets of glass cloth 4 impregnated with epoxy resin are interposed therebetween, respectively. Thus, a laminate is provided. Then, the part of the laminate filled with the resin is drilled to open an aperture. The through hole is then plated and patterned to connect the through hole circuit 6 with the metallic board 1. In this manner, the circuit can be connected with the metallic board with high reliability without using wire bonding. |
