Patent ID: 9362166
Filing Date: 2016-06-07
CPC Classification: H01L

Claim Text:
1. A method of forming a copper wiring buried in a recess portion of a predetermined pattern formed in an interlayer insulation layer of a substrate, the method comprising: forming a manganese oxide film at least on a surface of the recess portion, the manganese oxide film serving as a self-aligned barrier film through reaction with the interlayer insulation layer; performing hydrogen radical treatment with respect to a surface of the manganese oxide film; placing a metal more active than ruthenium on the surface of the manganese oxide film after the hydrogen radical treatment; forming a ruthenium film on the surface where the metal more active than ruthenium is present; and forming a copper film on the ruthenium film by physical vapor deposition (PVD) to bury the copper film in the recess portion, wherein the placing a metal more active than ruthenium is performed by discontinuously forming the metal on a wall portion of the recess portion.