Patent ID: 8569880
Filing Date: 2013-10-29
Classification: H01L,H05K

Abstract:
1. A multilayer printed wiring board, comprising: a multilayer core substrate comprising a first outer conductive layer formed on a first surface of the multilayered core substrate, a second outer conductive layer formed on a second surface of the multilayered core substrate, a first inner conductive layer formed between the first and second surfaces of the multilayered core substrate, a second inner conductive layer formed between the first and second surfaces of the multilayered core substrate, and a plurality of through holes connecting the first surface with the second surface, wherein each of the first and second inner conductive layers has a thickness which is greater than thicknesses of the first and second outer conductive layers, the plurality of through holes includes a plurality of power source through holes connected to a power source circuit and a plurality of grounding through holes connected to a ground circuit, each of the first and second outer conductive layers includes a plurality of grounding conductive layer portions and a plurality of power source conductive layer portions such that the power source through holes are connected to the power source conductive layer portions in the first and second outer conductive layers, respectively, and that the grounding through holes are connected to the grounding conductive layer portions in the first and second outer conductive layers, respectively, and the power source through holes and the grounding through holes are alternately positioned such that each of the power source through holes is surrounded by adjacent ones of the grounding through holes and that each of the grounding through holes is surrounded by adjacent ones of the power source through holes.