Patent ID: 8542331

Claim:
A display device comprising: a substrate; a plurality of gate pad metal layers disposed in a first direction on the substrate; a plurality of data pad metal layers disposed in a second direction on the substrate; a gate fanout unit connecting the gate pad metal layers and gate lines of a display area; a data fanout unit connecting the data pad metal layers and data lines of the display area; an upper insulating layer pattern disposed on the plurality of gate pad metal layers, the plurality of data pad metal layers, the gate fanout unit, and the data fanout unit, and a lower insulating layer pattern disposed between the substrate and both the plurality of data pad metal layers and data fanout unit, wherein the upper insulating layer pattern does not completely cover a first region between two neighboring gate pad metal layers, a second region between two neighboring data pad metal layers, or both the first region and the second region, thereby forming a first opening, and wherein the thickness of the lower insulating layer pattern disposed under the plurality of data pad metal layers is different from the thickness of the lower insulating layer pattern disposed in the first opening.