Patent ID: 7800002
Filing Date: 2010-09-21
Classification: C23C,H01L,H05K,Y10T

Abstract:
1. A multilayer wiring board comprising: a core substrate; and two or more wiring layers provided through an electrical insulating layer on the core substrate, characterized in that the core substrate is a silicon core substrate and has a plurality of through holes filled with an electroconductive material for electrical conduction between the front side and back side of the core substrate, the through holes have an opening diameter in the range of 10 to 100 μm, an insulation layer and an electroconductive material diffusion barrier layer preventing the diffusion of the electroconductive material into the core substrate are provided on the inner wall surface of the through holes, the electroconductive material has been filled into the through holes through the insulation layer, a via connected to the electroconductive material is disposed immediately above the through holes and a first wiring layer of the two or more wiring layers is provided on the core substrate through the electrical insulating layer and is connected to the electroconductive material within the through hole through the via, wherein the insulation layer comprises a first insulation layer and a second insulation layer, and the insulation layer and the electroconductive material diffusion barrier layer are stacked on the inner wall surface within the through holes in the order of the first insulation layer, the electroconductive material diffusion barrier layer, and the second insulation layer, wherein the first insulation layer and the second insulation are formed of an identical material.