Organic light emitting diode display device

An organic light emitting diode (OLED) display device, comprising:

• a substrate including a display region and a pad region;
• a display structure in the display region on the substrate;
• and
• a pad electrode structure in the pad region on the substrate, the pad electrode structure including:
• a first pad electrode on the substrate,
• a first insulation layer covering opposite lateral portions of the first pad electrode and exposing a portion of an upper surface of the first pad electrode,
• a second pad electrode on the first pad electrode and on the first insulation layer, the second pad electrode having a step portion where the first pad electrode and the first insulation layer are overlapped,
• a third pad electrode on the second pad electrode and on the first insulation layer, the third electrode covering the second pad electrode, and
• a solid second insulation layer covering opposite lateral portions of the third pad electrode.