Patent ID: 8299529
Filing Date: 2012-10-30
Classification: H01L

Abstract:
1. A method for producing a thin film transistor of an inverted staggered type, comprising the steps of: forming a gate electrode on an object to be processed; forming a gate insulation layer on the gate electrode; forming a semiconductor layer on the gate insulation layer; forming an ohmic contact layer on the semiconductor layer; forming a metallic wiring layer on the ohmic contact layer; and forming first and second ohmic contact layers, a source electrode, and a drain electrode by patterning the ohmic contact layer and the metallic wiring film, wherein the step of forming the metallic wiring film includes a step of sputtering a target of a copper alloy having Al and copper, with Al being included at a rate of between at least 5 atom % and at most 30 atom %, in a vacuum atmosphere with a gas, including a sputtering gas and an oxidizing gas, for forming an adhesion layer having copper, Al and oxygen on the ohmic contact layer.