Patent ID: 11948864
Assignee: TOSHIBA ELECTRONIC DEVICES & STORAGE CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor device, comprising:
a first nitride semiconductor layer on a substrate;
a second nitride semiconductor layer on the first nitride semiconductor layer and having a band gap larger than that of the first nitride semiconductor layer;
a first wiring on the second nitride semiconductor layer and extending in a first direction;
a first source electrode on the second nitride semiconductor layer, electrically connected to the first wiring, and extending in a second direction intersecting the first direction;
a first drain electrode extending in the second direction and including:
a first drain wiring extending in the second direction on the second nitride semiconductor layer,
a second drain wiring extending in the second direction on the second nitride semiconductor layer, spaced from the first drain wiring in the first direction,
a first element isolation region in the second nitride semiconductor layer between positions of the first drain wiring and the second drain wiring, and
a third drain wiring extending in the second direction on the first drain wiring and the second drain wiring; and

a first gate electrode extending in the second direction on the second nitride semiconductor layer between the first source electrode and the first drain electrode in the first direction, wherein
the third drain wiring includes a plurality of holes therein aligned with each other along the second direction with spacing between adjacent holes in the second direction increasing with increasing distance in the second direction from the first wiring.