Patent ID: 8586433
Filing Date: 2013-11-19
Classification: H01L

Abstract:
1. A compound semiconductor device, comprising: a first nitride semiconductor layer of a first conductivity type; a second nitride semiconductor layer of the first conductivity type formed over the first nitride semiconductor layer and being in contact with the first nitride semiconductor layer; a third nitride semiconductor layer of a second conductivity type being in contact with the second nitride semiconductor layer; a fourth nitride semiconductor layer of the first conductivity type being in contact with the third nitride semiconductor layer; an insulating film insulating the first nitride semiconductor layer and the fourth nitride semiconductor layer from each other; a drain electrode formed on a rear surface of the first nitride semiconductor layer; a source electrode formed on the fourth nitride semiconductor layer; and a gate electrode formed above the third nitride semiconductor layer across a gate insulating film, wherein the source electrode is positioned inside an outer edge of the insulating film in planar view.