Patent ID: 6802949
Filing Date: 2004-10-12
Classification: C23C,H01J

Abstract:
A method for manufacturing a half-metallic magnetic oxide thin film on a substrate using a plasma sputtering apparatus provided with a substrate holder for supporting the substrate, a metal target being opposite to the substrate holder, a gas injection inlet for supplying oxygen gas into a reaction chamber, and a power supply unit for applying a voltage to the reaction chamber using the target and the substrate holder as both electrodes, said method comprising the steps of:disposing a conductor provided with at least one hole between the substrate holder and the metal target; forming a magnetic field at an area where a thin film is formed on the substrate, said magnetic field having a coercive force larger than that of the thin film to be formed; injecting oxygen gas into the reaction chamber; applying a designated voltage to the reaction chamber so as to form a sputtering condition; and forming a half-metallic magnetic oxide thin film on the substrate by bonding ions discharged from the metal target to oxygen ions decomposed from the oxygen gas under the sputtering condition of the reaction chamber.