Patent ID: 7688414

Claim:
A method for fabricating a liquid crystal display device, comprising: forming a gate line, a gate electrode connected to the gate line, a common electrode and a common line connected the common electrode on a substrate in a first mask process; depositing a gate insulating layer on the substrate to cover the gate line, the gate electrode and the common electrode; forming an active layer on the gate insulating layer, the active layer overlapping the gate electrode to form a channel layer, and forming an ohmic contact layer on the active layer, a data line crossing with the gate line to define a pixel region and a source-drain pattern connected to the data line in a second mask process; depositing a protective layer over the data line, the source electrode and the drain electrode; patterning the source-drain pattern to form a source electrode and a drain electrode, completing the channel layer by removing a portion of the ohmic contact layer between the source electrode and the drain electrode, and forming a pixel contact hole exposing the drain electrode by penetrating the protective layer in a third mask process; and forming a pixel electrode that generates a horizontal electric field with the common electrode in the pixel region, wherein the pixel connects electrode to the drain electrode through the pixel contact hole in a fourth mask process using a reverse tapered photo-resist pattern, wherein the pixel electrode and the common electrode are formed in a zigzag shape while the data line is formed in a liner line shape, wherein a conductive line patterns of the substrate such as the pixel electrode, the common electrode, the gate line and the data line are formed with the reverse tapered photo-resist pattern, wherein at least one of the pixel electrode, common electrode, the gate lien, the data line and the common line has a line width of about 1.5˜4.0 μm.