Patent ID: 7550821

Claim:
A nitride semiconductor device, comprising: a substrate; a nitride semiconductor layer formed on a main surface of the substrate and having a channel region through which electrons drift in a direction parallel to the main surface; a plurality of first electrodes and a plurality of second electrodes formed spaced apart from each other so as to be alternately arranged on an active region in the nitride semiconductor layer; a first insulating film and an interlayer insulating film sequentially formed on the nitride semiconductor layer in this order and having a plurality of openings that expose the respective first electrodes; a first electrode pad formed in a region on the interlayer insulating film over the active region and electrically connected to an exposed portion of each of the first electrodes through the respective openings, and a third electrode that is formed in a region between each first electrode and each second electrode on the nitride semiconductor layer and serves as a gate electrode of a field effect transistor, wherein each of the first electrodes is one of a drain electrode and a source electrode of the field effect transistor and each of the second electrodes is another one of the drain electrode and the source electrode.