Patent ID: 9209041
Filing Date: 2015-12-08
Classification: H01J,H01L

Abstract:
1. A plasma processing method performed in a plasma processing apparatus, the plasma processing method comprising: a first process of supplying a fluorine-containing gas into a plasma processing space to generate plasma of the fluorine-containing gas and etching a target substrate, in which at least one of a silicon oxide film and a silicon nitride film is formed on a surface of a nickel silicide film, with the plasma of the fluorine-containing gas; a second process of supplying a hydrogen-containing gas into the plasma processing space to generate plasma of the hydrogen-containing gas and reducing, with the plasma of the hydrogen-containing gas, a nickel-containing material deposited on a member, of which a surface is arranged to face the plasma processing space, after the first process; and a third process of supplying an oxygen-containing gas into the plasma processing space to generate plasma of the oxygen-containing gas and removing nickel, which is obtained by reducing the nickel-containing material in the second process, with the plasma of the oxygen-containing gas, wherein variation in Vpp on the target substrate is suppressed by removing the nickel-containing material deposited on the member, of which the surface is arranged to face the plasma processing space, through the second process and the third process.