Patent ID: 7399706

Claim:
A manufacturing method of a semiconductor device, comprising: providing a first barrier metal film by a PVD process in a recess formed in at least one insulating film provided above a substrate, the first barrier metal film containing at least one metal element belonging to any one of the groups 4 -A, 5 -A, and 6 -A; sequentially providing a second barrier metal film by at least one of CVD and ALD processes on the first barrier metal film, without opening to atmosphere between providing the first barrier metal film and providing the second barrier metal film, the second barrier metal film containing at least one metal element belonging to any one of the groups 4 -A, 5 -A, and 6 -A; sequentially providing a third barrier metal film by a PVD process on the second barrier metal film, without opening to the atmosphere between providing the second barrier metal film and providing the third barrier metal film, the third barrier metal film containing at least one metal element belonging to any one of the groups 4 -A, 5 -A, and 6 -A; sequentially providing a first Cu film on the third barrier metal film, without opening to the atmosphere between providing the third barrier metal film and providing the first Cu film; and heating the first Cu film.