Patent ID: 7292302

Claim:
A method for manufacturing a fringe field switching liquid crystal display (FFS-LCD), the method comprising the steps of: forming a pair of gate bus lines on a lower substrate; depositing sequentially first and second gate insulating films, an amorphous silicon layer and a doped semiconductor layer on the lower substrate; patterning predetermined portions of the doped semiconductor layer, the amorphous silicon layer and the second gate insulating film and thereby defining an active region including an ohmic contact layer and a channel layer; forming a planar counter electrode using a transparent conductive material, on the first gate insulating film at a side of the active region; depositing a metal film on the first and second gate insulating films and the counter electrode, patterning a predetermined portion of the metal film and thereby forming a data bus line, a source electrode, a drain electrode and a common signal line, wherein the common signal line is disposed on the counter electrode with running in parallel with the data bus line such that the common signal line and the counter electrode are directly contacted to each other; wherein the gate bus line pair is laid substantially perpendicular to the data bus line and the area formed by the intersection is referred to as a unit pixel, wherein the common signal line is formed on the planar counter electrode inside the unit pixel and runs in parallel with a data bus line, wherein the common signal line is formed on the planar counter electrode and runs in parallel with and in between two data bus lines, depositing a passivation film on the resultant lower substrate; etching the passivation film in a manner such that the drain electrode is exposed; and forming a plurality of pixel electrodes in the unit pixel using a transparent conductive material, on the passivation layer, in a manner such that the pixel electrode is brought into contact with the exposed drain electrode, the pixel electrode cooperating with the counter electrode to form a fringe field, wherein the pixel electrode and the counter electrode are on a different layer separated by the passivation layer, wherein a distance between the counter electrode and the pixel electrode is set to be smaller than the predetermined cell gap according to FFS-LCD design principles.