Patent ID: 7402944

Claim:
An organic light emitting display device (OLED) comprising: a substrate; a thin film transistor (TFT) located on the substrate, and having a semiconductor layer, a gate electrode, and source and drain electrodes on the substrate; a passivation layer located on the TFT and over substantially an entire surface of the substrate, and having a via hole for exposing one electrode of the source and drain electrodes, and a groove; a first electrode on the passivation layer, the first electrode being in electrical contact with the one electrode of the source and drain electrodes through the via hole, and having an edge located in the groove; a pixel defining layer located on the first electrode and having an opening for exposing a predetermined portion of the first electrode; an organic layer having at least one emission layer, a predetermined region of which is in contact with the predetermined portion of the first electrode; and a second electrode formed on the organic layer.