Patent ID: 9219137
Filing Date: 2015-12-22
Classification: B82Y,H01L

Abstract:
1. A vertical gallium nitride transistor, comprising: a first semiconductor layer of a first conductivity type comprising a first surface, a second surface opposite to the first surface, and sidewalls; a second semiconductor layer of the first conductivity type surrounding the second surface and the sidewalls of the first semiconductor layer; a third semiconductor layer of a second conductivity type disposed between the first semiconductor layer and the second semiconductor layer, the third semiconductor layer separating the first and second semiconductor layers from each other; a source electrode disposed on the first surface of the first semiconductor layer, the source electrode being electrically connected to the first semiconductor layer; a gate electrode disposed on a first surface of the third semiconductor layer between the first and second semiconductor layers; a drain electrode, wherein the second semiconductor layer is disposed on a first surface of the drain electrode; and a current blocking layer disposed between the drain electrode and the second semiconductor layer, the current blocking layer comprising a lower surface in direct contact with the drain electrode and an upper surface that is in direct contact with the second semiconductor layer, wherein the first semiconductor layer, the third semiconductor layer, and the second semiconductor layer comprise a semiconductor structure.