Patent ID: 7713869

Claim:
A semiconductor device manufacture method comprising steps of: (a) forming an interlayer insulating film having a concave portion, on a semiconductor substrate; (b) forming an adhesion layer on an inner surface of the concave portion and on an upper surface of the interlayer insulating film; (c) covering a surface of the adhesion layer with an auxiliary film made of Cu alloy containing a first metal element; (d) embedding a conductive member containing a second metal element other than the first metal element, in the concave portion, and depositing the conductive member on the auxiliary film; and (e) performing heat treatment to make atoms of the first metal element in the auxiliary film segregate on the inner surface of the concave portion and atoms of the adhesion layer diffuse into the conductive member, wherein the adhesion layer contains an element for enhancing tight adhesion of the auxiliary film more than if the auxiliary film is deposited directly on a surface of the interlayer insulating film; and wherein a third metal element constituting the adhesion layer diffuses in the conductive member, and the adhesion layer is extinguished during the heat treatment.