Patent ID: 7847197

Claim:
A multilayer circuit board comprising: a laminate including a plurality of substrate layers; and a wiring pattern disposed in the laminate; wherein at least one layer of the plurality of substrate layers includes, as the wiring pattern, at least one fully penetrating via-hole conductor that vertically passes through the substrate layer, and at least one partially penetrating via-hole conductor that is electrically connected to the fully penetrating via-hole conductor in the substrate layer and does not pass completely through the substrate layer; each of the at least one fully penetrating via-hole conductor and the at least one partially penetrating via-hole conductor is made of metal; and the at least one fully penetrating via-hole conductor and the at least one partially penetrating via-hole conductor extend continuously along the at least one layer of the plurality of substrate layers such that no portion of the at least one layer of the plurality of substrate layers is disposed between the at least one fully penetrating via-hole conductor and the at least one partially penetrating via-hole conductor.