Patent ID: 7666793

Claim:
A method of manufacturing an amorphous metal oxide film comprising: a process for depositing an amorphous metal oxide film; and a film treatment process for improving film quality of said amorphous metal oxide film in the state in which an amorphous state of said amorphous metal oxide film is maintained by a high-density plasma radiation treatment based upon ion and radical reactions and which contains at least oxygen at an ion current density higher than 5 mA/cm 2 , wherein said process for depositing said amorphous metal oxide film is a film-deposition process using a source of said high-density plasma radiation and which is mainly composed of radical reaction and plasma electric power required in said film-deposition process selected to be higher than 40 W and less than 200 W, wherein all of said film-deposition processes and said film treatment processes of said amorphous metal oxide film are carried out at a temperature under 430° C., and wherein a leakage current value is less than 1×10 −8 A/cm 2 .