Patent ID: 8514340
Filing Date: 2013-08-20
Classification: G02F,H01L

Abstract:
1. A method of fabricating an array substrate for used in a liquid crystal display device, comprising: sequentially forming a molybdenum alloy (Mo-alloy) layer and then only a copper (Cu) layer on the molybdenum alloy (Mo-alloy) layer on a substrate; patterning the molybdenum alloy (Mo-alloy) layer and the copper (Cu) layer to form a Cu/Mo-alloy double-layered gate line and a Cu/Mo-alloy double-layered gate electrode, said gate line being disposed in a transverse direction and said gate electrode extending from the gate line, wherein the Mo-alloy layer is directly formed on the substrate and the Cu layer is formed on the Mo-alloy layer, wherein the Mo-alloy and Cu layers are simultaneously patterned by an etching solution, wherein a step is formed between the Cu layer and the Mo-alloy layer due to the difference of an etching rate, and wherein a width of the Cu layer is shorter than a width of the Mo-alloy layer and the Cu layer has a single width, such that there is a distance between a sidewall of the Cu layer and a sidewall of the Mo-alloy layer; forming a gate insulation layer on the substrate to cover said gate line and said gate electrode; forming an active layer and an ohmic contact layer sequentially on the gate insulation layer, over said gate electrode; forming a data line, a source electrode and a drain electrode, wherein the data line is disposed on the gate insulation layer and crosses the gate line to define a pixel region, the source electrode extends from the data line on the ohmic contact layer, and the drain electrode is spaced apart from the source electrode on the ohmic contact layer; forming a passivation layer on the gate insulation layer to cover the data line, the source electrode and the drain electrode, wherein the passivation layer has a drain contact hole that exposes a portion of the drain electrode; and forming a pixel electrode on the passivation layer, wherein the pixel electrode electrically contacts the drain electrode through the drain contact hole.