Field-effect transistor

Abstract

An object is to provide a field effect transistor which uses a liquid electrolyte as a gate and which operates stably in the liquid electrolyte. A field effect transistor includes a channel (2) formed of a portion of a hydrogen-terminated surface of a diamond, the portion being exposed to the outside between a gate electrode (3) and a drain electrode (6); and a gate formed of a liquid electrolyte (4) in contact with the exposed portion of the hydrogen-terminated surface of the diamond.

Dependencies are inferred from the claim text.