Patent ID: 9226397
Filing Date: 2015-12-29
Classification: H01L,H05K

Abstract:
1. A multilayer printed wiring board, comprising: a multilayer core substrate including an interlayer insulating layer stacked over each of the outer conductor layers and filling a portion between the conductor circuits in each of the outer conductor layers; and a plurality of through hole structures formed through the multilayer core substrate, the plurality of through hole structures including a first through hole structure and a second through hole structure, the first through hole structure electrically connecting the inner power supply layer and the outer power supply layer, the second through hole structure electrically connecting the inner earth layer and the outer earth layer, wherein the outer power supply layer and the inner earth layer are formed over one another with an insulation layer formed therebetween, the inner power supply layer and the outer earth layer are formed over one another with an insulation layer formed therebetween, each of the inner conductor layers comprises a metallic foil layer, and each of the outer conductor layers comprises a metallic foil layer and a plated layer and is formed such that the inner conductor layers are thicker than the outer conductor layers, respectively.