Patent ID: 7732826
Filing Date: 2010-06-08
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a substrate comprised of SiC; a first contact layer arranged parallel to the substrate; a p electrode on the first contact layer; a second contact layer arranged parallel between the substrate and the first contact layer; an n electrode on the second contact layer; one or more luminescent layers arranged parallel between the first contact layer and the second contact layer; one or more electron gas layers with two-dimensional electron gases that are distributed parallel to the luminescent layers; and a buffer layer comprised of AlGaN with a molar ratio of AlN in the buffer layer of at least 25%, with the buffer layer coupled to the substrate; the one or more electron gas layers are comprised of GaN adjacent the AlGaN buffer layer; one of the one or more electron gas layers is coupled to the AlGaN buffer layer to accumulate the two-dimensional electron gas within an interface to the AlGaN buffer layer, with the one or more two-dimensional electron gas layers effectively having no intermixed impurities, enabling the two dimensional electron gases to have extremely high mobility without being scattered by impurities.