PRINTED WIRING BOARD AND METHOD FOR MANUFACTURING THE SAME

摘要

The printed wiring board 1 includes the metallic substrate 2, the insulating layer 3 provided on the surface of the metallic substrate 2, and the conductive layer 4 formed on the surface of the insulating layer 3. The conductive layer 4 is electrically connected to the metallic substrate 2. A bottomed via hole or a through hole 6 is formed in the insulating layer 3 and the conducive layer 4. The via hole has a bottom in the metallic substrate 2, and has a wall surface in the insulating layer 3 and in the conductive layer 4. The through hole 6 extends through the insulating layer 3, the conductive layer 4, and the metallic substrate 2. Conductive paste 7 fills the bottomed via hole or the through hole 6 to electrically connect the metallic substrate 2 and the conductive layer 4 with each other. The printed wiring board 1 is subjected to a process in which current is applied to the interface between the metallic substrate 2 and the conductive paste 7.