Patent ID: 9699909
Date: 2017-07-04
CPC Classifications: H01L,H05K

Claim:
1. A wiring board with a built-in electronic component, comprising: a core substrate; an electronic component positioned in the core substrate and having a plurality of surface electrodes; a first upper-layer structure formed on a first surface of the core substrate and comprising an upper wiring layer and an upper insulation layer; a second upper-layer structure formed on a second surface of the core substrate on an opposite side with respect to the first surface of core substrate and comprising an upper wiring layer and an upper insulation layer; a plurality of stacked via conductors formed in the core substrate and the first upper-layer structure such that the plurality of stacked via conductors is connected to one of the surface electrodes of the electronic component; and a through-stacked via structure comprising a plurality of via conductors such that the via conductors are formed in and stacked through the core substrate, the first upper-layer structure and the second upper-layer structure, wherein the core substrate has a component-accommodating layer, a first connection layer positioned on a first surface of the component-accommodating layer, and a second connection layer positioned on a second surface on an opposite side with respect to the first surface of the component-accommodating layer, the component-accommodating layer includes a plurality of inner wiring layers and a plurality of inner insulation layers and has a cavity accommodating the electronic component, the first connection layer includes an inner wiring layer and an inner insulation layer, the second connection layer includes a plurality of inner wiring layers and a plurality of inner insulation layers such that the second connection layer includes a greater number of inner wiring layers and a greater number of inner insulation layers than the first connection layer, and the plurality of stacked via conductors is formed through the first connection layer of the core substrate and the first upper-layer structure.