Patent ID: 8299366

Claim:
A wiring board comprising: a substrate having a first surface and a second surface on an opposite side of the first surface; an electronic component provided inside the substrate; a first insulation layer formed on the substrate and the electronic component, the first insulation layer comprising a first lower insulation layer and a first upper insulation layer formed directly on the first lower insulating layer, wherein the first lower insulation layer and the first upper insulation layer comprise different materials from each other, the first lower insulation layer is positioned on and in contact with the first surface of the substrate and the electronic component, and the material of the first lower insulation layer is filled in a clearance between the substrate and the electronic component; and a first conductive layer formed on a surface of the first upper insulating layer of the first insulation layer, wherein: the first conductive layer includes a conductive pattern, the electronic component has a connection terminal on a surface of the electronic component which faces a first-surface side of the substrate, and the connection terminal of the electronic component and the conductive pattern are electrically connected by a via hole that penetrates each of the first upper and first lower insulating layers of the first insulation layer.