Patent ID: 9595601
Date: 2017-03-14
CPC Classifications: H01L

Claim:
1. A method of fabricating a thin-film semiconductor substrate including a thin-film semiconductor, the method comprising: forming a semiconductor layer including the thin-film semiconductor above a substrate; forming a metal film comprising Cu above the substrate; forming at least one of an electrode and a line by processing the metal film in a predetermined shape; irradiating an upward facing surface of the at least one of the electrode and the line with nitrogen plasma after the forming of the at least one of the electrode and the line; exposing the upward facing surface of the at least one of the electrode and the line with silane (SiH forming an insulating layer comprising an oxide on the at least one of the electrode and the line after the exposing, wherein outermost portions of the upward facing surface of the at least one of the electrode and the line each have a tapered shape inclined from a normal direction of the substrate in a cross-sectional view, the outermost portions each being irradiated with the nitrogen plasma and exposed to the silane gas in the normal direction, and for the at least one of the electrode and the line, the insulating layer is formed only on the upward facing surface.