Patent ID: 6307245
Filing Date: 2001-10-23
Classification: H01L

Abstract:
A semiconductor device comprising:a semi-insulating substrate;an active layer on the semi-insulating substrate;a semiconductor substrate including a Schottky layer and a semiconductor gate embedding layer, disposed on the semi-insulating substrate, the gate embedding layer having side surfaces transverse to the semi-insulating substrate and a top surface parallel to the semi-insulating substrate;a gate electrode; anda source electrode and a drain electrode disposed on opposite sides of the gate electrode, the gate electrode comprising:an embedded portion contacting the Schottky layer and embedded in and contacting the side surfaces of the gate embedding layer;two first extending portions contiguous with the embedded portion and contacting the top surface of the gate embedding layer; anda pair of second extending portions contiguous with the first extending portions and opposite the gate embedding layer so that lower surfaces of the second extending portions are spaced from the top surface of the gate embedding layer.