THIN FILM TRANSISTOR SUBSTRATE OF HORIZONTAL ELECTRONIC FIELD APPLYING TYPE

摘要

A TFT(thin film transistor) of a horizontal electric field applying type is provided to stabilize the electric filed of a common voltage applied to a common electrode and to prevent an image distortion phenomenon caused by distortion of a common voltage by reducing the parasitic capacitance between a common electrode and a gate line. A pixel region is defined by a gate line(102) and a data line(104). A TFT(106) is connected to the gate line and the data line. A common line is parallel with the gate line. A source electrode(110) is connected to the data line. A drain electrode(112) is connected to the pixel electrode. A common electrode(118) crosses the gate line on a plane, and is vertically extended from the common line. A pixel electrode(114) is formed in the pixel region to be connected to the TFT. The pixel electrode and the common electrode form a horizontal electric field. A dummy layer(120) is formed between the gate line and the common electrode to include a region where at least the gate line crosses the common electrode. The dummy layer is made of a metal material like a source/drain electrode.