Amorphous-silicon thin film transistor and shift register having the same

A shift register for driving a liquid crystal display device, shift register providing turn-on signal and turn-off signal to a plurality of gate lines electrically coupled to a plurality of thin film transistors arranged in a matrix shape on a liquid crystal display panel, the shift register comprising:

• a first conductive layer formed on a substrate;
• a second conductive layer spaced apart from the substrate by a predetermined distance, the second conductive layer including a body conductive portion and a hand conductive portion extending from each end of the body conductive portion to form a symmetric U-shape;
• and
• a third conductive layer spaced apart from the substrate by the predetermined distance, the third conductive layer including an elongated portion and a base portion substantially perpendicular to each other, the elongated portion straightly formed and disposed between each of the hand conductive portions of the second conductive layer wherein contacts of the second and third conductive layers are on a same plane,
• wherein the first conductive layer entirely overlaps each of the hand conductive portions of the second conductive layer and the elongated portion of the third conductive layer.