Patent ID: 7473632

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, an air gap is formed by covering, with the second insulating film, an interconnection-to-interconnection gap formed by removing a portion of the first insulating film between the lower interconnections, the connection portion is connected to one of the lower interconnections not adjacent to the air gap, and a part of the second insulating film coming into contact with the air gap and a part of the second insulating film formed on one of the lower interconnections not adjacent to the air gap are the identical film.