Patent ID: 6653216
Filing Date: 2003-11-25
Classification: H01L,Y02E

Abstract:
A method of fabricating an active matrix substrate, comprising:forming a line layer of an Al-based metal film on a substrate; forming an insulating film covering the line layer; forming at least one contact hole which extends through the insulating film on the line layer, and exposes at least a part of the line layer; forming an ITO film on the insulating film and said at least the part of the line layer which is exposed by the contact hole; and patterning the ITO film by performing dry etching with reactive ion etching using a mixed gas of a hydrogen halide gas and an inert gas, thereby removing at least a part of that portion of the ITO film which is formed on said at least the part of the line layer to expose that part of the line layer, and forming a transparent electrode layer on the insulating layer, the transparent electrode layer being formed of a part of the ITO film; wherein the hydrogen halide gas is a hydriodic acid gas, and the inert gas is a helium gas; and wherein a flow rate ratio of the helium gas to the hydriodic acid gas is 0.2 to 0.5.