Patent ID: 8242539

Claim:
A field effect transistor comprising: a stacked layer structure provided with a plurality of nitride semiconductor layers, the stacked layer structure including a carrier transit layer; a gate electrode provided on the stacked layer structure; and a source electrode and drain electrode provided on the stacked layer structure in such manner that the gate electrode is placed between the source and drain electrodes; wherein: the stacked layer structure has a step portion having inclined side surfaces exposing respective end portions of the carrier transit layer to the source electrode and drain electrode, the inclined side surfaces extending from a lower step of the step portion to an upper step of the step portion, the source and drain electrodes are respectively connected to the end portions of the carrier transit layer, and are provided respectively on the inclined side surfaces of the step portion, and parts of the source electrode and drain electrode are provided respectively on a surface of an upper step of the step portion.