Patent ID: 8835925

Claim:
A method of fabricating an array substrate for an IPS mode LCD device, comprising: forming a gate line along a first direction, a gate electrode and a common electrode of a plate shape on a substrate, using a first mask; forming a first metal pattern and a second metal pattern at opposing ends of the common electrode; forming a gate insulating layer on the gate line, the gate electrode and the common electrode; forming a semiconductor layer on the gate insulating layer and corresponding to the gate electrode, using a second mask; forming source and drain electrodes and a data line on the semiconductor layer and the gate insulating layer, using a third mask, wherein the source and drain electrodes are separated from each other, and the data line is arranged along a second direction and crosses the gate line to define one pixel region, the first and second metal patterns being parallel to the data line and each having at least a portion formed above and overlapping the opposing ends of the common electrode, the first and second metal patterns overlapping the common electrode and the data line; forming a passivation layer including a drain contact hole on the source and drain electrodes and the data line, using a fourth mask, the drain contact hole exposing the drain electrode; and forming a pixel electrode connected to the drain electrode through the drain contact hole on the passivation layer and in the one pixel region, using a fifth mask, wherein the pixel electrode includes first and second portions and a plurality of third portions combining the first portion with the second portion, wherein the first and second portions are parallel to the second direction and separated from each other, and wherein all of the plurality of third portions of the pixel electrode in the one pixel region along a third direction are oblique to the first and second portions and separated from one another, wherein the gate insulating layer between the common and pixel electrodes has a dielectric constant between about 3 and about 4 and includes one of benzocyclobutene (BCB) and acrylic resin.