Patent ID: 9214562
Filing Date: 2015-12-15
Classification: H01L

Abstract:
1. A method of manufacturing a field-effect transistor including a substrate, a gate electrode, a gate insulating film, a source electrode, a drain electrode, a pixel electrode, an oxide semiconductor layer containing an oxide semiconductor, and an inorganic insulating layer containing a Ga-containing oxide, the method comprising: forming an electroconductive layer containing at least one selected from the group consisting of the source electrode, the drain electrode and the pixel electrode; forming the inorganic insulating layer, by a vapor phase film-forming method, so as to cover the electroconductive layer and the oxide semiconductor layer; resist-forming a photoresist film on the inorganic insulating layer; exposing the photoresist film in a pattern shape; and developing, using a developer, the exposed photoresist film to form a resist pattern, and removing an area of the inorganic insulating layer exposed from the resist pattern by using the developer as an etching liquid, wherein the etching liquid is an alkaline solution, thereby exposing a part of the electroconductive layer, wherein the gate electrode is provided on the substrate, the gate insulating film is provided between the gate electrode and the electroconductive layer, the oxide semiconductor layer is provided to contact at least the electroconductive layer, and the inorganic insulating layer covers the electroconductive layer and the oxide semiconductor layer.