Patent ID: 8785788

Claim:
A wiring board with a built-in electronic component, comprising: a substrate having an opening portion and having a first surface and a second surface on an opposite side of the first surface; and an electronic component having a third surface and a fourth surface on an opposite side of the third surface and positioned in the opening portion of the substrate such that the third surface faces a same direction as the first surface of the substrate, wherein the electronic component has a curved surface joining the fourth surface and a side surface of the electronic component, and the opening portion of the substrate is partially tapered and has a tapered portion formed by a tapered surface of the substrate joining an inner wall of the opening portion and the first surface and tapering from the first surface toward the second surface, and the substrate has a thickness which is larger than a thickness of the electronic component, and the tapered surface is formed from the first surface to a deeper point than the third surface of the electronic component.