Patent ID: 8535975

Claim:
A method for manufacturing an organic light emitting diode (OLED) display comprising: forming an active layer and a capacitor lower electrode on a substrate; forming a gate insulating layer on the active layer and the capacitor lower electrode; sequentially stacking a metal oxide layer and a metal layer on the gate insulating layer, coating a first photosensitive layer on the metal layer and patterning the first photosensitive layer using a first halftone mask to form a first photosensitive pattern and a second photosensitive pattern each having a different thickness, etching the metal oxide layer and the metal layer to form a gate electrode pattern, a capacitor upper electrode pattern, and a first electrode pattern, ashing the first photosensitive pattern and the second photosensitive pattern to reduce a thickness of the first photosensitive pattern and to remove the second photosensitive pattern, etching the metal layer of the capacitor upper electrode pattern and the metal layer of the first electrode pattern, which are exposed by removing the second photosensitive pattern, to form a capacitor upper electrode and a first electrode, and removing the first photosensitive pattern to form a gate electrode; forming an interlayer insulating layer on the gate electrode, the capacitor upper electrode, and the first electrode; forming a source electrode and a drain electrode on the interlayer insulating layer; coating a second photosensitive layer on the source electrode and the drain electrode and patterning the second photosensitive layer using a second halftone mask to form a bank layer and a spacer; forming an organic layer on the first electrode; and forming a second electrode on the organic layer.