Patent ID: 9064945
Filing Date: 2015-06-23
Classification: H01L

Abstract:
1. A heterostructure field effect transistor (HFET) gallium nitride (GaN) semiconductor power device comprising: a hetero-junction structure comprises a first semiconductor layer interfacing a second semiconductor layer of two different band gaps thus generating an interface layer as a two-dimensional electron gas (2DEG) layer; a source electrode and a drain electrode disposed on two opposite sides of a gate electrode disposed on top of said hetero-junction structure for controlling a current flow between said source and drain electrodes in said 2DEG layer; said hetero-junction structure comprises said first and second semiconductor layers constituting a rectangular block with a longitudinal direction extending from the source electrode to the drain electrode; and the gate electrode constituting a wrap-around gate wrapping around a segment of said rectangular block around sidewalls and a top surface of said middle segment of said rectangular block to control the 2DEG layer generated between the first and second semiconductor layers.