Patent ID: 7705947

Claim:
A method of fabricating a liquid crystal display device, comprising: a first mask process of forming a first mask pattern group including a gate line, a gate electrode connected to the gate line and a common line parallel to the gate line having a first conductive layer group structure including at least double conductive layers, and a common electrode extended from the common line, on a substrate; a second mask process of forming a gate insulating film on the first mask pattern group, forming a semiconductor pattern on the gate insulating film, and exposing a portion of the common electrode, so that the common electrode at that portion consists of one conductive layer of the first conductive layer group; and a third mask process of forming a third mask pattern group including a data line, a source electrode connected to the data line and a drain electrode opposite the source electrode that have a second conductive layer group structure including at least double conductive layers, and a pixel electrode having a single layer structure formed by an extension of a lowermost layer of the drain electrode, on the gate insulating film provided with the semiconductor pattern; wherein the first mask process includes forming a lower pad electrode connected to one of the gate line, the data line and the common line from the first conductive layer group, wherein the second mask process includes forming a contact hole passing through the gate insulating film to expose the lower pad electrode, and wherein the third mask process includes forming an upper pad electrode connected, via the contact hole, to the lower pad electrode from the lowermost layer of the second conductive layer group.