Patent ID: 6953954
Filing Date: 2005-10-11
Classification: H01L

Abstract:
1. A plasma oscillation switching device comprising: a substrate; a first barrier layer composed of a III-V compound semiconductor formed on the substrate; a channel layer composed of a III-V compound semiconductor formed on the first barrier layer; a second barrier layer composed of a III-V compound semiconductor formed on the channel layer; and a source electrode, a gate electrode and a drain electrode formed on the second barrier layer; wherein the first barrier layer includes either an n-type diffusion layer or a p-type diffusion layer, and the second barrier layer has a diffusion layer of the opposite type, the energy at the conduction band edge of the barrier layer having the n-type diffusion layer is larger than the energy at the conduction band edge of the channel layer, and the energy at the valence band edge of the barrier layer having the p-type diffusion layer is smaller than the energy at the valence band edge of the channel layer; two-dimensional electron gas is accumulated at the boundary between the barrier layer having the n-type diffusion layer and the channel layer, and two-dimensional hole gas is accumulated at the boundary between the barrier layer having the p-type diffusion layer and the channel layer; and the source electrode, the gate electrode, and the drain electrode are electrostatically coupled with the two-dimensional electron gas and two-dimensional hole gas.