Patent ID: 8384077
Filing Date: 2013-02-26
Classification: H01L

Abstract:
1. A field effect transistor which comprises, on a substrate, at least a semiconductor layer, a passivation layer, a source electrode, a drain electrode, a gate insulating film and a gate electrode, the source electrode and the drain electrode being connected to each other through the semiconductor layer, the gate insulating film being present between the gate electrode and the semiconductor layer, the passivation layer being at least on one surface side of the semiconductor layer, and the semiconductor layer comprising a composite oxide which comprises In (indium), Zn (zinc) and Ga (gallium) in the following atomic ratios (1) to (3): wherein the semiconductor layer is an amorphous film which has an energy width (E 0 ) on the non-localized level of 14 meV or less.