FIELD-EFFECT TRANSISTOR, METHOD FOR MANUFACTURING FIELD-EFFECT TRANSISTOR, DISPLAY DEVICE USING FIELD-EFFECT TRANSISTOR, AND SEMICONDUCTOR DEVICE

摘要

A field effect transistor which includes an oxide film as a semiconductor layer, the oxide film has a channel part, a source part and a drain part, and the channel part, the source part and the drain part have substantially the same composition except oxygen and an inert gas.