Patent ID: 7935893

Claim:
A printed wiring board comprising: a first insulation layer having a first surface and a second surface opposite to the first surface; a conductive film formed on the first surface of the first insulation layer; a second insulation layer formed on the second surface of the first insulation layer; an electronic component enclosed in the second insulation layer and having a terminal; a via conductor connected to the terminal of the electronic component and provided in a via hole formed through the conductive film and the first insulation layer; and a conductive circuit formed on the first surface of the first insulation layer and comprising the conductive film, the conductive film being connected to the via conductor, wherein the first insulation layer and the conductive film have a through hole formed through the first insulation layer and the conductive film, the second insulating layer has an alignment mark comprising an insulative material and formed in the though hole, the first insulation layer comprises an insulative material, the insulative material of the first insulation layer is the insulative material of the alignment mark, and the alignment mark is positioned such that the electronic component and the via hole are positioned based on the alignment mark.