Patent ID: 7662725
Filing Date: 2010-02-16
Classification: C23F,G02F

Abstract:
1. A method of fabricating an array substrate for a liquid crystal display device, comprising: forming a first double metal layer including aluminum neodymium (AlNd) and molybdenum (Mo) on a substrate; forming a first photoresist pattern on the first double metal layer; etching the first double metal layer with a composition including about 63.5% to about 64.5% by weight of a phosphoric acid, about 8% to about 9% by weight of a nitric acid, about 8% to about 12% by weight of an acetic acid, and about 1% to about 4% by weight of a fluoric anionic surfactant to form a gate line and a gate electrode without an AlNd residue and a Mo tail; forming a gate insulating layer on the gate line and the gate electrode; forming a semiconductor layer on the gate insulating layer at a portion corresponding to the gate electrode; forming a data line on the gate insulating layer and source/drain electrodes on the semiconductor layer; forming a passivation layer on the data line and the source and drain electrodes, the passivation layer has a drain contact hole exposing the drain electrode; and forming a pixel electrode on the passivation layer, the pixel electrode connected to the drain electrode through the drain contact hole.