A method of manufacturing an organic light emitting display panel, the method including: providing a pixel defined by an intersection of one of a plurality of data lines and one of a plurality of gate lines, the providing the pixel including: providing a transistor, providing a storage capacitor including: a first electrode, and a second electrode, and providing a semiconductor layer, providing a first plate partially overlapping the semiconductor layer in the pixel, the providing a first plate including: providing a gate portion of the transistor, and providing a capacitor-forming portion including the first electrode of the storage capacitor, and providing a second plate on the first plate in the pixel, the second plate including the second electrode of the storage capacitor, the second plate not overlapping the semiconductor layer.