Patent ID: 7646040
Filing Date: 2010-01-12
Classification: H01L

Abstract:
1. A boron phosphide-based compound semiconductor device having a heterojunction structure comprising a Group-III nitride semiconductor layer having a (0.0.0.1.) crystal plane and a boron phosphide layer, wherein the surface of the Group-III nitride semiconductor layer has a crystal plane inclined at an angle that is within ±5° with respect to the (0.0.0.1.) crystal plane of the Group-III nitride semiconductor layer, the boron phosphide layer is a zinc-blende crystal type having a {111} crystal plane directly stacked on the (0.0.0.1.) crystal plane of the Group-III nitride semiconductor layer in parallel to the (0.0.0.1.) crystal plane, the Group-III nitride semiconductor layer is wurtzite crystal type, and the [2.−1.−1.0.] crystal azimuth of the (0.0.0.1.) crystal plane of the Group-III nitride semiconductor layer orients in parallel to the <110> crystal azimuth of the {111} crystal plane of the boron phosphide layer.