Patent ID: 11888053
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. The field-effect transistor according to claim 6, further comprising:
a second source electrode and a second drain electrode on the ohmic cap layer, wherein the insulating layer is further disposed on the ohmic cap layer between the second source electrode and the second drain electrode;
a second gate opening in the insulating layer between the second drain electrode and the second source electrode, wherein a distance of the second gate opening from the second drain electrode is greater than a distance of the second gate opening from the second source electrode;
a plurality of second asymmetric openings in the insulating layer between the second gate opening and the second drain electrode, an opening size of the plurality of second asymmetric openings in the gate length direction being greater than an opening size of the plurality of second asymmetric openings in the gate width direction;
a second recess region below the second gate opening and the plurality of second asymmetric openings; and
a second gate electrode on the insulating layer and disposed in the second gate opening and the second recess region, wherein the second gate electrode is joined to the barrier layer through a second Schottky junction, wherein the opening size of the plurality of first asymmetric openings in the gate length direction is different from the opening size of the plurality of second asymmetric openings in the gate length direction.