Patent ID: 8174657

Claim:
An LCD (liquid crystal display device) comprising: a gate line, a first and a second data lines arranged to cross each other so as to define a unit pixel region, where the first and the second data lines overlap each other and the second data line is made of a transparent metal; a thin film transistor disposed at a crossing region where the gate line, the first and the second data lines are crossed, and having a passivation layer only on an exposed channel layer; a common line disposed in parallel to the gate line; a first storage electrode integrally formed with the common line for forming a storage capacitance Cst in the unit pixel region; a second storage electrode disposed to be overlapped with the first storage electrode and made of the transparent metal; common electrodes branched from the first storage electrode and disposed at the unit pixel region; pixel electrodes branched from the second storage electrode, and are alternatively disposed with the common electrodes and made of the transparent metal; a first data pad formed at an edge of the first data line and formed by an extension of the first data line; and a second data pad formed to overlap with the first data pad and formed by an extension of the second data line, where the second data pad is contacted to a whole upper surface of the first data pad, wherein the thin film transistor includes source and drain electrodes having a double-layered structure, respectively, wherein the second storage electrode and the pixel electrodes are formed by an extension of only an upper layer of the drain electrode to be formed of a single layer, wherein the upper layer of the drain electrode covers a side of a lower layer of the drain electrode.