Patent ID: 8502285
Filing Date: 2013-08-06
Classification: H01L

Abstract:
1. A thin-film transistor comprising: a glass substrate; a gate electrode film that is formed on the glass substrate; a silicon nitride film that is formed on the glass substrate and the gate electrode film; an n an n a barrier film that comprises a silicon oxide film formed on the n a drain electrode film and a source electrode film that are formed on the barrier film comprising the silicon oxide film, wherein each of the drain electrode film and the source electrode film comprises a composite copper alloy film which comprises: at least a copper alloy underlayer containing an oxygen-calcium concentrated layer that is formed so as to come into contact with the barrier film comprising the silicon oxide film; and a Cu layer that is formed on the copper alloy underlayer containing an oxygen-calcium concentrated layer, the copper alloy underlayer containing an oxygen-calcium concentrated layer comprises a concentrated layer, and the concentrated layer comprises 2 mol % to 30 mol % of Ca, 20 mol % to 50 mol % of oxygen, and as the remainder, Cu and inevitable impurities.