Organic light emitting display device and method of manufacturing the same

An organic light emitting display device comprising:

• a first insulation layer on a substrate;
• an active layer of a TFT on the first insulation layer;
• a second insulation layer covering the active layer;
• a pixel electrode on the second insulation layer;
• a gate bottom electrode on the active layer and at the same layer as and comprising the same material as the pixel electrode;
• a first pad electrode at the same layer as and comprising the same material as the gate bottom electrode and spaced from the gate bottom electrode;
• a second pad bottom electrode at the same layer as and comprising the same material as the first pad electrode and electrically connected to the first pad electrode;
• a gate top electrode on the gate bottom electrode;
• a second pad top electrode on the same layer as and comprising the same material as the gate top electrode and on the second pad bottom electrode;
• a third insulation layer covering at least portions of the pixel electrode, the gate top electrode, the first pad electrode, and the second pad top electrode;
• and
• a source electrode and a drain electrode on the third insulation layer, one of the source electrode or the drain electrode contacting the pixel electrode.

A method of manufacturing an organic light emitting display device, the method comprising:

• performing a first masking operation for forming an active layer of a TFT on a substrate;
• performing a second masking operation for forming a gate electrode, a second pad electrode, and electrode patterns for forming a pixel electrode and a first pad electrode, on the active layer;
• performing a third masking operation for forming an interlayer insulation layer having an opening that exposes two opposite ends of the active layer and a portion of the electrode patterns;
• performing a fourth masking operation for forming source and drain electrodes that respectively contact the two opposite exposed ends of the active layer, the pixel electrode, and the first pad electrode;
• and
• performing a fifth masking operation for forming a pixel define layer that exposes at least a portion of the pixel electrode.