Organic light emitting display with circuit measuring pad and method of fabricating the same

1. An organic light emitting display comprising:

a substrate having a display region and a circuit measuring pad region;

source and drain electrodes arranged above the display region, and a first conductive layer arranged above the circuit measuring pad region on the same layer as the source and drain electrodes;

a first insulating layer arranged on the source and drain electrodes and the first conductive layer;

first and second via holes formed in the first insulating layer, the first via hole exposing the source or drain electrode, the second via hole exposing the first conductive layer;

a pixel electrode contacting the source or drain electrode through the first via hole, and a second conductive layer contacting the first conductive layer through the second via hole; and

a pixel defining layer which exposes the pixel electrode and formed on the second conductive layer.

2. The display of claim 1 , wherein the second conductive layer has a thickness in a range of 100 to 1,000 Å.

3. The display of claim 1 , wherein the pixel defining layer has a thickness of 3,000 Å or less.

4. The display of claim 1 , wherein the second via hole has a taper angle of 50° or less.

5. The display of claim 1 , wherein an edge of the first conducive layer has a taper angle of 50° or less.

6. The display of claim 1 , wherein the first insulating layer is a passivation layer.

7. The display of claim 6 , wherein the first insulating layer further includes a planarization layer arranged on the passivation layer.

8. The display of claim 7 , wherein the second via hole has a taper angle of 50° or less.

9. The display of claim 7 , wherein the planarization layer includes an opening which exposes the circuit measuring pad region, and the second via hole is arranged in the passivation layer.