Patent ID: 7990510

Claim:
A liquid crystal display device, comprising: a gate line provided on a substrate; a data line crossing the gate line with a gate insulating film therebetween to define a pixel area; a thin film transistor including a gate electrode connected to the gate line, a source electrode connected to the data line, a drain electrode opposed to the source electrode and a semiconductor pattern defining a channel between the source electrode and the drain electrode; a common line on the substrate in parallel to the gate line; a common electrode extended from the common line into the pixel area; and a pixel electrode extended from the drain electrode into the pixel area, wherein a horizontal electric field is formed between the pixel electrode and common electrode, wherein the gate line and the common line are formed of a first conductive layer group having at least double conductive layers, wherein a portion of the common electrode is formed of one conductive layer of the first conductive layer group and another portion of the common electrode is formed of multiple layers of the first conductive layer group, and wherein the gate line, the source electrode, and the drain electrode have a second conductive layer group of at least double conductive layers, and the pixel electrode is formed by an extension of at least one transparent conductive layer of the drain electrode.