Patent ID: 6888586

Claim:
An array substrate for a liquid crystal display device, comprising: a substrate; a gate electrode formed on the substrate; a gate insulating film covering the gate electrode; an active layer overlapping the gate electrode over the gate insulating film; an ohmic contact layer on a part of the active layer, the ohmic contact layer defining a channel region in the active layer; a drain electrode at an upper portion of the substrate, the drain electrode including, at least in part, two layers of conductive materials and having a first drain contact hole penetrating the two layers such that sides of the two layers are exposed at all inner side surfaces of the first drain contact hole; a protective layer over the drain electrode, the protecting layer having a second drain contact hole communicating with the first drain contact hole; and a pixel electrode over the protective layer, the pixel electrode contacting the drain electrode at the inner surfaces of the first drain contact hole formed in the drain electrode through the second drain contact hole, wherein the gate insulating film is exposed through the first and second drain contact holes, and wherein the pixel electrode directly contacts the exposed gate insulating film through the first and second drain contact holes.