Patent ID: 7550783
Filing Date: 2009-06-23
Classification: H01L

Abstract:
1. A high electron mobility transistor (HEMT), comprising: a plurality of active semiconductor layers; a two dimensional electron gas (2DEG) at the heterointerface between two of said plurality of active layers; source and drain electrodes in contact with said 2DEG; a gate formed between said source and drain electrodes and on said plurality of active layers; a spacer layer covering substantially all of the surface of said plurality of active layers between said gate and said source and at least part of the surface of said plurality of active layers between said gate and said drain electrode; a field plate on said spacer layer; and at least one conductive structure electrically connecting said field plate to said source electrode, said at least one conductive structure comprising one or more conductive buses running between said field plate and said source electrode on the topmost surface of said spacer layer and covering less than all of the topmost surface between said gate and said source electrode, said spacer layer providing electrical isolation between said plurality of active layers and said conductive buses.