Reflection-transmission type liquid crystal display device and method for manufacturing the same

A method for manufacturing a liquid crystal display device, the method comprising the steps of:

• forming a gate electrode on a display region of a substrate, and a gate pad on a pad region of the substrate located in a periphery of the display region;
• forming a gate insulation layer to cover the gate electrode and the gate pad;
• forming an active pattern and an ohmic contact pattern on the gate insulation layer;
• forming a first electrode and a second electrode on the ohmic contact pattern, and simultaneously forming a data pad on the gate insulation layer in the pad region;
• forming a passivation layer on the first and second electrodes, the data pad, and the gate insulation layer;
• etching the passivation layer to form first, second, and third contact holes for exposing the second electrode, the gate pad, and the data pad, respectively;
• forming a transparent electrode on the display region and simultaneously, forming a gate pad electrode and a data pad electrode connected to the gate pad and the data pad through the second and third contact holes, respectively;
• successively forming a barrier metal layer and a reflective layer on the transparent electrode and the pad electrodes;
• annealing the reflective layer for preventing lifting of the reflective layer;
• and
• patterning the reflective layer and the barrier metal layer to form a reflective layer and a barrier metal layer pattern on the transparent electrode.