Patent ID: 7692193
Filing Date: 2010-04-06
Classification: H01L

Abstract:
1. An array substrate for a liquid crystal display device, comprising: a gate line and a data line on a substrate intersecting each other, the data line includes a first layer formed of a transparent conductive material and a second layer under the first layer; a thin film transistor including a gate electrode connected to the gate line formed at respective intersection of the gate and data lines, an insulating layer on the gate electrode, an active layer on the insulating layer and disposed within a width of the gate electrode, an etch stopper on the active layer, an ohmic contact layer on the etch stopper, a source electrode on the ohmic contact layer and connected to the first layer, a drain electrode spaced apart from the source electrode; a pixel electrode connected to the drain electrode, wherein the source electrode, the drain electrode and the pixel electrode are formed of the same layer and the same material as the first layer; and a buffer metal layer between the ohmic contact layer and the source electrode and between the ohmic contact layer and the drain electrode, wherein the buffer metal layer is disposed within a width of the active layer.