Patent ID: 9107314
Filing Date: 2015-08-11
Classification: G01R,H05K,Y10T

Abstract:
1. A method of manufacturing a wiring board including a core substrate having conductivity and a plurality of penetrating-through hole vias, the method comprising: forming an outer through hole that penetrates through the core substrate at a portion of the core substrate where a penetrating-through hole via is to be formed; filling the outer through hole with an insulation resin; forming a first conductive layer on a surface portion of the insulation resin where a core connecting via electrically connected with the core substrate is formed among the plurality of penetrating-through hole vias; forming a land around the first conductive layer; laminating a wiring layer over the core substrate after the forming of the first conductive layer and the forming of the land; forming an inner through hole that has a smaller diameter than that of the outer through hole and penetrates through the core substrate and the wiring layer so as to penetrate through the insulation resin; and coating a first conductive film on an inner wall surface of the inner through hole, wherein the core substrate and the first conductive film of the core connecting via are electrically connected through the first conductive layer and the land.