Patent ID: 7888713
Filing Date: 2011-02-15
Classification: H01L

Abstract:
1. A semiconductor device comprising: a substrate including a compound semiconductor; a semiconductor layer formed on a surface of the substrate, a constituent of the semiconductor layer including a nitride semiconductor different from a constituent of the substrate; a via hole provided in the substrate and configured to extend from a rear surface side of the substrate to the semiconductor layer; a ground electrode formed on an inner wall of the via hole; a contact layer provided in the semiconductor layer, the contact layer being configured to extend from a surface of the semiconductor layer to the ground electrode, the contact layer comprising a metal layer independent of the ground electrode, and a base level of the contact layer being at a same level as an interface of the substrate and the semiconductor layer; a gate electrode and a drain electrode, each of which being formed on the semiconductor layer, and a source electrode formed on the semiconductor layer and on the contact layer, and connected to the ground electrode through the contact layer.