THIN FILM TRANSISTOR OF LIQUID CRYSTAL DISPLAY ELEMENT

摘要

PURPOSE: A TFT liquid crystal is provided to reduce the flicker phenomena by overlapping the point of the source electrode and the drain electrode on the etch stopper which leads to the lowering of the kick back voltage and the Cgs. CONSTITUTION: A device comprises a gate bus line(10), a round projection part(11), an active line(20), a projection part(21), a round etch stopper(30), a pixel(40), a source electrode(50), and a drain electrode(60).The gate bus line extends to certain direction on the insulation substrate. The gate insulation layer is formed on the upper part of the whole gate bus line structure. The etch stopper is formed on the upper part of a certain part of the gate bus line. The active line is arranged to surround the etch stopper and formed to cover the gate bus line area in which the etch stopper is formed. The source electrode and the drain electrode are formed to overlap the active line and the etch stopper, the point area of the two electrodes overlaps the etch stopper and source electrode and the drain electrode are formed in a triangle shape corresponding to both sides of the etch stopper.