Patent ID: 8759133

Claim:
A method of manufacturing a back panel for a display apparatus, the method comprising: forming a first electrode material layer on a substrate, the first electrode material layer comprising a transparent conductive layer, a semiconductor layer, and a metal layer; performing a first mask process on the first electrode material layer, to form a pixel electrode and a gate electrode; forming a first insulating layer on the substrate and a transparent conductive oxide material layer on the first insulating layer; performing a second mask process on the transparent conductive oxide layer, to form an active layer on the gate electrode; forming a second insulating layer on the substrate; performing a third mask process to form first openings in the second insulating layer that expose portions of the active layer, and to form a second opening and a third opening in the first and second insulating layers, the second and third openings exposing portions of the pixel electrode; forming a second electrode material layer on the substrate; performing a fourth mask process on the second electrode material layer, to form first and second electrodes that contact the active layer through the first openings, and to enlarge the third opening by removing a portion of the metal layer and a portion of the semiconductor layer; forming a third insulating layer on the substrate; and performing a fifth mask process to remove a portion of the third insulating layer from the third opening and to expose the transparent conductive layer of the pixel electrode.