Patent ID: 6040201
Filing Date: 2000-03-21
Classification: G02F,H01L

Abstract:
A method of manufacturing a thin film diode provided in a liquid crystal display, comprising a lower electrode connected with a signal electrode, an anodic oxidation film formed on a surface of the lower electrode, and an upper electrode formed so as to overlie the lower electrode via the anodic oxidation film and connected with a pixel electrode, said method comprising:a process comprising steps of forming a lower electrode material film of tantalum nitride on a substrate, forming a photoresist on the lower electrode material film, and patterning on the photoresist by applying a photolithographic treatment;a process of forming the lower electrode and the signal electrode by etching the lower electrode material film using the patterned photoresist as an etching mask;a process of forming an anodic oxidation film of a tantalum oxide film on the surface of the lower electrode by applying an anodic oxidation treatment to the lower electrode using an anodic oxidation solution;a first annealing process applied annealing in a vacuum to the anodic oxidation film;a process of forming an upper electrode material film composed of a transparent and electrically conductive film on an entire surface of the substrate including the surface of the lower electrode with the anodic oxidation film formed thereon;a second annealing process applied annealing in a vacuum to the substrate with the upper electrode material film formed thereon;a process comprising steps of forming a photoresist on the upper electrode material film, and patterning on the photoresist by applying the photolithographic treatment; anda process of forming the upper electrode and the pixel electrode by etching the upper electrode material film using the patterned photoresist as an etching mask.