Patent ID: 7622807

Claim:
A semiconductor device, comprising: a plurality of lower interconnections formed at intervals in a first insulating film; a second insulating film formed over the lower interconnections and the first insulating film; a connection portion formed in the second insulating film and connected to one of the lower interconnections; and an upper interconnection formed in the second insulating film and connected to the connection portion, wherein between the lower interconnections, a low-dielectric-constant film is formed to fill an interconnection-to-interconnection gap formed by removing a portion of the first insulating film between the lower interconnections, and is covered with the second insulating film, the connection portion is connected to one of the lower interconnections not adjacent to the low-dielectric-constant film, and a part of the second insulating film coming into contact with the low-dielectric-constant film and a part of the second insulating film formed on one of the lower interconnections not adjacent to the low-dielectric-constant film are the identical film.