Patent ID: 8637868

Claim:
An organic light emitting display device comprising: a thin-film transistor comprising: an active layer, a gate electrode, source and drain electrodes, a first insulation layer disposed between the active layer and the gate electrode, and a second insulation layer disposed between the gate electrode and the source and drain electrodes; a pixel electrode disposed on the first and second insulation layers and connected to one of the source and drain electrodes; a capacitor comprising: a first electrode disposed on the same layer as the gate electrode, a second electrode formed of the same material as the pixel electrode, a first protection layer disposed on the second electrode, and a second protection layer disposed on the first protection layer; a third insulation layer disposed between the second insulation layer and the pixel electrode, and between the first electrode and the second electrode; a fourth insulation layer covering the source and drain electrodes and the second protection layer, and exposing the pixel electrode; an organic light emitting layer disposed on the pixel electrode; and a counter electrode disposed on the organic light emitting layer.