Patent ID: 8519406

Claim:
An organic light emitting display device comprising: a substrate; a first wiring formed on the substrate in a first direction; second and third wirings formed on the substrate in a second direction; a first thin film transistor connected to the first and second wirings; a second thin film transistor connected to the first thin film transistor and the third wiring; and an organic light emitting display panel (OLED) connected to the second thin film transistor, wherein the second and third wirings are formed of graphene; and the first thin film transistor comprises: an active layer formed on the substrate; a gate electrode formed at a location of the substrate corresponding to the active layer and being insulated from the active layer; an insulating layer covering the gate electrode and having openings connected to the active layer; and source and drain electrodes formed on the insulating layer and connected to the active layer through the openings, wherein the source and drain electrodes comprise first portions buried in the openings and second portions formed on the insulating layer, and the first portions and the second portions are formed of materials different from each other.