Patent ID: 6327443
Filing Date: 2001-12-04
Classification: G02F

Abstract:
A liquid crystal display device comprising first and second substrates opposing each other at a certain gap, a plurality of electrodes disposed on the first substrate, thin film transistors as nonlinear resistors disposed in a region where the plurality of electrodes overlap, and a liquid crystal filled between the first and second substrates, characterized in that:a plurality of gate electrodes for applying an external signal to the thin film transistors, and an opaque anode oxide electrode for forming a gate insulating film by subjecting the gate electrodes to an anodic oxidation treatment are provided on the first substrate, and the plurality of said gate electrodes are connected to each other by the opaque anode oxide electrode when the gate electrodes are subject to the anodic oxidation treatment;wherein a gate insulating film as an anode oxidation film thereof is formed on the gate electrodes, a semiconductor layer is provided on the gate insulating film, and a source electrode and a drain electrode are provided on the semiconductor layer, thereby forming the thin film transistor;wherein a display electrode is provided on the first substrate so as to be connected to the drain electrode;wherein a part of the opaque anode oxide electrode which connects the gate electrodes is separated upon completion of the anodic oxidation treatment, thereby separating the respective gate electrodes from each other to permit them to be independent of each other;wherein the display electrodes and the thin film transistors provided corresponding to each of the display electrodes are arranged in a matrix shape, thereby forming a display region; andwherein a shading portion comprising the remaining part of the opaque anode oxide electrode is provided at the periphery of the display region.