Patent ID: 6570194
Filing Date: 2003-05-27
Classification: H01L

Abstract:
A structure of a semiconductor device, said structure comprising:a compound semiconductor multi-layer structure having at least a channel region; a gate electrode provided on said compound semiconductor multi-layer structure; an ohmic contact layer of a first material provided adjacent to a first side face of said multi-layer structure said ohmic contact layer being in contact with at least a part of said first side face; and at least one electrode being in contact with said ohmic contact layer, said at least one electrode being spatially separated from said compound semiconductor multi-layer structure by said ohmic contact layer, wherein said ohmic contact layer has a top extending portion which extends in contact with a part of a top surface of said multi-layer structure, wherein said top extending portion of said ohmic contact layer extends continuously from an edge of said top surface of said multi-layer structure inwardly, wherein said top extending portion of said ohmic contact layer has a first lateral length which is defined between an inside edge of said top extending portion and said edge of said top surface of said multi-layer structure, and said first lateral length is not less than a total thickness of said multi-layer structure, and wherein said first lateral length is not more than a half of a distance between said edge of said top surface of said multi-layer structure and an edge of said gate electrode.