Patent ID: 9591767
Date: 2017-03-07
CPC Classifications: H01L,H05K,Y10T

Claim:
1. A component built-in board comprising: a plurality of printed wiring bases stacked therein and having a resin base, and a wiring pattern and a via formed on/in the resin base; and an electronic component built in the component built-in board, wherein at least a portion of the plurality of printed wiring bases include a thermal wiring in the wiring pattern and include a thermal via in the via, at least one of the plurality of printed wiring bases has formed therein an opening where the electronic component is built, and has formed therein a heat-conducting layer configured from a metallic member and closely attached to an opposite surface of the electronic component on an opposite side to an electrode formation surface of the electronic component built in to the opening, the electronic component is fixed in the opening by an adhesive layer stacked on the heat-conducting layer, via a hole formed in a region of the heat-conducting layer facing onto the opening, the adhesive layer contacting the opposite surface via the hole of the heat-conducting layer, and wherein the heat-conducting layer is connected to the thermal via and the thermal wiring.