Patent ID: 9220168
Filing Date: 2015-12-22
Classification: H05K

Abstract:
1. A wiring board with a built-in electronic component, comprising: a core substrate having a thickness not exceeding 300 μm and having a cavity having an opening on a surface of the core substrate and a second opening on a second surface on an opposite side of the core substrate with respect to the surface; an electronic component having a thickness not exceeding 300 μm and accommodated in the cavity of the core substrate; a laminated structure formed on the surface of the core substrate and comprising an insulation resin layer and a wiring layer such that the laminated structure is covering the opening of the cavity of the core substrate and the electronic component accommodated in the cavity of the core substrate; and a second laminated structure formed on the second surface of the core substrate and comprising an insulation resin layer such that the second laminated structure is covering the second opening of the cavity of the core substrate and the electronic component accommodated in the cavity of the core substrate, wherein the electronic component has an insulation material body and an electrode formed on a surface of the insulation material body, the wiring layer of the laminated structure is formed such that a thickness of the wiring layer is set smaller than a thickness of the electrode, the laminated structure has a filled via structure connected to the electrode of the electronic component, and the second laminated structure has a recessed via structure connected to a second electrode of the electronic component on a second surface of the insulation material body on an opposite side with respect to the surface having the electrode.