Patent ID: 8971053
Filing Date: 2015-03-03
Classification: H01L,H05K,Y02P,Y10T

Abstract:
1. A wiring board, comprising: a first substrate having a first opening portion penetrating through the first substrate; a built-up layer formed on a surface of the first substrate and comprising a plurality of interlayer resin insulation layers and a plurality of wiring layers, the built-up layer having a second opening portion communicated with the first opening portion of the first substrate and opened to an outermost surface of the built-up layer on an opposite side of the first substrate such that the first opening portion of the first substrate and the second opening portion of the built-up layer form a penetrating hole; an interposer accommodated in the second opening portion of the built-up layer and comprising a wiring layer, the wiring layer of the interposer comprising a plurality of conductive circuits configured to be connected to a plurality of semiconductor elements; a filler filling the penetrating hole such that the interposer is held in the second opening portion of the built-up layer; and a plurality of first mounting pads formed on the outermost surface of the built-up layer and positioned to mount the semiconductor elements, wherein the first mounting pads are positioned to form a matrix on the outermost surface of the built-up layer, and the second opening portion of the built-up layer has a tapered portion tapering toward the outermost surface of the built-up layer.