Patent ID: 7894032

Claim:
A liquid crystal display device, comprising: first and second substrates; a gate line on the first 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 opposite the source electrode and a semiconductor pattern defining a channel between the source electrode and the drain electrode; a common line on the first substrate substantially 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 to form a horizontal electric field with the common electrode, wherein the data line, the source electrode, the drain electrode and the pixel electrode are formed of a first conductive layer group having at least double conductive layers, and are formed in an area to be sealed by a sealant upon joining the first and second substrates.