Patent ID: 8952507
Filing Date: 2015-02-10
Classification: H01L,H05K

Abstract:
1. A wiring board, comprising: a substrate having a cavity, a first surface and a second surface on an opposite side of the first surface; an electronic component accommodated in the cavity of the substrate; and an insulation layer formed on the first surface of the substrate such that the insulation layer is covering an opening of the cavity, wherein the substrate has a thickness which is greater than a thickness of the electronic component such that a ratio of the thickness of the substrate to the thickness of the electronic component is set in a range of 0.3 or greater and 0.7 or less, and the electronic component is positioned in the cavity of the substrate such that a distance from the first surface of the substrate to the electronic component is set less than a distance from the second surface of the substrate to the electronic component.