Patent ID: 8906738
Filing Date: 2014-12-09
Classification: H01L

Abstract:
1. A method of manufacturing a thin film transistor having a gate insulating film interposed between a gate electrode and an oxide semiconductor layer, and a source/drain electrode layer electrically connected to the oxide semiconductor layer, the method comprising: forming the gate electrode on a substrate; forming the oxide semiconductor layer on the gate insulating film; forming the source/drain electrode layer on the oxide semiconductor layer; after forming the source/drain electrode layer, forming a protective film, utilizing a sputtering method, on one or more of the source/drain electrode layer, the gate insulating film, and the oxide semiconductor layer, wherein the protective film is formed by continuously depositing an aluminum oxide layer on the one or more of the source/drain electrode layer, the gate insulating film, and the oxide semiconductor layer, and continuously depositing an aluminum layer on the aluminum oxide layer and selectively removing at least a portion of the aluminum layer.