Patent ID: 8184251

Claim:
A substrate for a display panel, the substrate comprising: a base substrate; a gate line disposed in a first direction on the base substrate, the gate line including a gate electrode; a first gate insulating layer disposed on the gate line; a second gate insulating layer disposed on the first gate insulating layer; a semiconductor layer disposed on the second gate insulating layer, the semiconductor layer including a channel portion; a data line disposed in a second direction, substantially perpendicular to the first direction, on the semiconductor layer, the data line including a source electrode and a drain electrode disposed opposite to the source electrode; a passivation layer disposed on the gate line and the data line, the passivation layer including an opening through which a portion of the first gate insulating layer and a portion of the drain electrode are exposed; and a pixel electrode disposed on the first gate insulating layer in the opening and connected to the drain electrode.