Display device and method of fabricating the same

A display device comprising:

• a substrate;
• a first wiring layer disposed on the substrate and including a gate signal wiring;
• a first insulating layer disposed on the first wiring layer;
• a second wiring layer disposed on the first insulating layer and including a data signal wiring, a data pad connected to the data signal wiring, and a drain electrode spaced apart from the data signal wiring;
• a second insulating layer disposed on the second wiring layer;
• and
• a pixel electrode disposed on the second insulating layer and electrically connected to the drain electrode,
• wherein the second wiring layer includes a first conductive metal layer and a metal compound layer which includes an oxide or a nitride of the first conductive metal layer and is disposed on the first conductive metal layer,
• wherein the metal compound layer has a reflectance lower than that of the first conductive metal layer, and
• wherein the metal compound layer has a resistance higher than that of the first area.

A method of fabricating a display device, comprising:

• sequentially forming a first pattern layer material layer, a second pattern layer material layer, a third pattern layer material layer, and a fourth pattern layer material layer on a substrate;
• patterning the first pattern layer material layer, the second pattern layer material layer, the third pattern layer material layer, and the fourth pattern layer material layer using one mask;
• and
• surface treating at least a part of the patterned first pattern layer material layer, the patterned second pattern layer material layer, the patterned third pattern layer material layer, and the patterned fourth pattern layer material layer to form a wiring layer including conductive layers and metal compound layers covering a top portion and a side portion of the conductive layers, the surface treating including an oxidation or a nitridation,
• wherein the metal compound layers have a light reflectance lower than that of the conductive layers.