Patent ID: 8564194

Claim:
An organic light emitting diode device, comprising: a first gate electrode of a first transistor on a substrate; a second gate electrode of a second transistor on the substrate: a gate insulation film on the first and second gate electrodes of the first and second transistors; a first source electrode of the first transistor on the gate insulation film and overlapping with the second gate electrode of the second transistor; a contact hole exposing the second gate electrode of the second transistor and the first source electrode of the first transistor, wherein the contact hole is formed within a region where the second gate electrode of the second transistor and the first source electrode of the first transistor are overlapped; and a conductive wiring in the contact hole, for electrically connecting the first source electrode of the first transistor and the second gate electrode of the second transistor, thereby connecting the first transistor with the second transistor, wherein the conductive wiring in the contact hole is in contact with a lateral surface of an inner of the second gate electrode of the second transistor and the first source electrode of the first transistor.