Patent ID: 7851245

Claim:
A method of manufacturing an organic light-emitting display device, the method comprising: depositing a material for forming a gate electrode and a pixel electrode on a substrate and patterning the material to form the gate electrode and the pixel electrode so that the gate electrode and the pixel electrode are insulated from each other, wherein the deposited material for forming the gate electrode and the pixel electrode comprises a metal layer formed on the substrate and a metal oxide layer formed on the metal layer and wherein, when the metal layer and metal oxide layer are patterned to form the gate electrode and the pixel electrode, each of the formed gate electrode and the pixel electrode comprises a patterned portion of the metal layer and a patterned portion of the metal oxide layer contacting the metal layer, wherein the patterned portion of the metal layer is between the metal oxide layer and the substrate; depositing a gate insulating material on the gate electrode and the pixel electrode; depositing an amorphous silicon layer on the gate insulating material; crystallizing the amorphous silicon layer to form a polycrystalline silicon layer; depositing an ohmic contact material on the polycrystalline silicon layer; patterning the gate insulating material, the polycrystalline silicon layer, and the ohmic contact material so that the pixel electrode is exposed to thereby form a gate insulating layer, a semiconductor layer, and an ohmic contact layer that are separated from the pixel electrode; depositing a conductive material on the substrate, the ohmic contact layer, and the pixel electrode, and patterning the conductive material so that the ohmic contact layer corresponding to the gate electrode is exposed to thereby form a first electrode that is connected to the ohmic contact layer and a second electrode that is separated from the first electrode and that is connected to the ohmic contact layer and the pixel electrode; etching an exposed portion of the ohmic contact layer; depositing a pixel defining layer forming material on the substrate, the first and second electrodes, the semiconductor layer, and the pixel electrode and patterning the pixel defining layer forming material so that the pixel electrode is exposed to form a pixel defining layer; and forming an organic light-emitting layer and an opposite electrode on the pixel electrode.