Patent ID: 7867906

Claim:
A method for manufacturing a semiconductor device, characterized in comprising: (a) a step for forming a trench and/or a via for forming wiring, in a prescribed region in an insulation film formed on top of a semiconductor substrate; (b) a step for forming a barrier metal film on said insulation film in which said trench and/or via is formed; (c) a step for forming a copper or copper alloy film on said barrier metal film; (d) a step for forming on said copper or copper alloy film an oxygen absorption film in which a standard energy of formation of an oxidation reaction in a range from room temperature to 400° C. is negative, and in which an absolute value of the standard energy of formation is larger than that of the barrier metal film formed in said (b) step; (e) a step for heating a layered film composed of said barrier metal film, said copper or copper alloy film, and said oxygen absorption film in a temperature range of 200 to 400° C.; and (f) a step for removing an upper part of said layered film and forming wiring.