Patent ID: 7884362

Claim:
An array Substrate for a liquid crystal display device, comprising: a gate line and a data line crossing each other on a Substrate to define a pixel region; an insulating layer between the gate line and the data line; a gate electrode extending from the gate line; a transistor in the pixel region having an active layer on the insulating layer, an ohmic contact layer on the active layer, a source electrode and a drain electrode on the ohmic contact layer; and a pixel electrode connected to the transistor, a passivation layer covering the source and drain electrodes and exposing the pixel electrode, wherein the passivation layer has an edge that substantially coincides with an edge of the drain electrode, wherein the active layer is in an island shape over the gate electrode and within a boundary defined by a perimeter of the gate electrode, wherein each of the source and drain electrodes includes a transparent conductive layer and a metallic material layer on the transparent conductive layer, wherein the transparent conductive metallic layer is formed on the insulating layer, and the metallic material layer is formed on the transparent conductive layer, and wherein the pixel electrode extends from and has the same layer as the transparent conductive layer of the drain electrode.