Patent ID: 6388720
Filing Date: 2002-05-14
Classification: G02F

Abstract:
A liquid crystal display device comprising first and second substrates opposing each other at a certain gap, a first electrode and a second electrode disposed on the first substrate, a nonlinear resistor disposed in a region wherein the first and second electrodes overlap, and a liquid crystal filled between the first and second substrates, characterized in that:said first electrode comprises a lower electrode constituting the nonlinear resistor, a plurality of signal electrodes for applying an external signal to the nonlinear resistor, a first anode oxide electrode connected to the signal electrodes for forming a nonlinear resistor layer by subjecting the lower electrode to an anodic oxidation treatment, a second anode oxide electrode independent of the first anode oxide electrode, and an auxiliary electrode connected to the second anode oxide electrode, and the plurality of signal electrodes are connected to each other by the first anode oxide electrode when the lower electrode is subject to the anodic oxidation treatment; wherein said second electrode is provided with upper electrodes disposed on the nonlinear resistor layer, a display electrode connected to the upper electrodes, and a connecting electrode for covering a part of the first and second anode oxide electrodes; wherein said nonlinear resistor is structured by said lower electrode, the nonlinear resistor layer formed by the anodic oxidation treatment of the lower electrode, and said upper electrodes; wherein the first anode oxide electrode is separated at portions thereof where the signal electrodes are connected to each other upon completion of the anodic oxidation treatment, thereby separating the signal electrodes from each other to permit them to be independent of each other; wherein the second anode oxide electrode is separated at portions thereof where the auxiliary electrodes are connected to each other upon completion of the anodic oxidation treatment, thereby separating the signal electrodes from each other to permit them to be independent of each other; and wherein the nonlinear resistor layer provided on the second anode oxide electrode by the anodic oxidation treatment is larger in thickness than the nonlinear resistor layer provided on the first anode oxide electrode.