Patent ID: 6097453
Filing Date: 2000-08-01
Classification: G02F,H01L

Abstract:
A method of producing an active matrix substrate for a liquid crystal display apparatus, said active matrix substrate having pixel electrodes each of which is provided with a thin film transistor at each intersecting point between plural signal lines and plural scanning lines perpendicular to the signal lines, comprising the steps of:providing a substrate;producing on the substrate a first insulation layer of silicon nitride;producing on the first silicon nitride insulation layer a second insulation layer of silicone oxide by thermally oxidizing the surface of the first silicon nitride insulation layer;producing a polycrystal silicon layer on the second silicone oxide insulation layer;producing the thin film transistors in the polycrystal silicon layer;forming insulation on the thin film transistors having through holes reaching to the source and drain regions of the thin film transistors;forming respective electrodes on said insulation in contact with the source and drain regions, said respective electrodes being formed by depositing aluminum and thereafter laminating TiN on the deposited aluminum;forming further insulation on said respective electrodes and the adjacent surface of said insulation, said further insulation having through holes reaching to the respective electrodes; andforming pixel electrodes on the said further insulation, each pixel electrode being in ohmic contact with an associated one of said respective electrodes.