Patent ID: 7553757

Claim:
A semiconductor device provided with Cu wiring formed with a copper that are buried in a wiring trench formed in an interlayer insulator, comprising: the interlayer insulator including a first interlayer insulator formed over a semiconductor substrate and a second interlayer insulator formed on the first interlayer insulator; a barrier metal film formed on an inner wall of the wiring trench except an upper part thereof higher than a vicinity of the middle of the second interlayer insulator; and a Cu wiring including a first Cu wiring and a second Cu wiring, the first Cu wiring formed on the barrier metal film along the inner wall of the wiring trench to leave a recess inside the wiring trench and brought into contact with the second interlayer insulator at the upper part of the wiring trench to cover the upper end of the barrier metal film, and the second Cu wiring formed to bury the wiring trench including the recess.