Patent ID: 8465995

Claim:
A method of manufacturing an array substrate for a fringe field switching mode liquid crystal display, the method comprising: forming a thin film transistor in a pixel region on a substrate; forming a first passivation layer on the thin film transistor; forming a common electrode on the first passivation layer; forming a second passivation layer on the common electrode; forming an auxiliary insulating layer on the second passivation layer and having a first thickness; forming first and second photoresist patterns on the auxiliary insulating layer and having second and third thicknesses, respectively, the second thickness greater than the third thickness; etching the auxiliary insulating layer, the second passivation layer and the first passivation layer using the first and second photoresist patterns as an etching mask to form a drain contact hole exposing a drain electrode of the thin film transistor; performing an ashing to remove the second photoresist pattern and expose the auxiliary insulating layer therebelow; performing a dry etching to remove the auxiliary insulating layer not covered by the first photoresist pattern and expose the first passivation layer and to form an insulating pattern below the first photoresist pattern, the insulating pattern and the first photoresist pattern forming an undercut shape; forming a transparent conductive material layer on the substrate having the first photoresist pattern and having a fourth thickness less than the first thickness; and performing a lift-off process to remove the first photoresist pattern and the transparent conductive material layer thereon together and form a pixel electrode as a remaining portion of the transparent conductive material layer.