Organic light-emitting display apparatus and method of manufacturing the same

A method of manufacturing an organic light-emitting display apparatus, the organic light-emitting display apparatus comprising a plurality of pixels on a substrate, the method comprising:

• forming one of the pixels, the forming of one of the pixels comprising:
• forming an organic light-emitting device comprising a first electrode, a second electrode, and an intermediate layer between the first electrode and the second electrode, the intermediate layer comprising an organic emission layer;
• forming a driving transistor configured to drive the organic light-emitting device, the driving transistor comprising an active layer, a gate electrode, a source electrode, and a drain electrode;
• and
• forming a switching transistor electrically coupled to the driving transistor, the switching transistor comprising an active layer, a gate electrode, a source electrode, and a drain electrode, wherein
• the gate electrode of the driving transistor includes a first conductive layer, and a second conductive layer between the first conductive layer and the active layer of the driving transistor, wherein the second conductive layer has a smaller width along a direction parallel to a surface of the substrate than the first conductive layer, and
• the gate electrode of the switching transistor comprises a same material as the first conductive layer.