Patent ID: 8558230

Claim:
A thin film transistor substrate, comprising: gate wiring disposed on a substrate; oxide active layer patterns disposed on the gate wiring, the oxide active layer patterns comprising a first substance; data wiring disposed on the oxide active layer patterns and crossing the gate wiring, the data wiring comprising a second substance; barrier layer patterns formed between the oxide active layer patterns and the data wiring, the barrier layer patterns comprising a third substance; and ohmic contact layer patterns disposed between the oxide active layer patterns and the barrier layer patterns, wherein the ohmic contact layer patterns and the oxide active layer patterns comprise the same elements, with the ohmic contact layer patterns having a lower oxygen content than the oxide active layer patterns, and wherein the data wiring comprises: a first layer disposed on the oxide active layer patterns and comprising an alloy of the second substance and the third substance; and a second layer disposed on the first layer and comprising the second substance.