Patent ID: 7936068
Filing Date: 2011-05-03
Classification: H01L

Abstract:
1. A semiconductor device, comprising: an interconnect layer including a plurality of interconnects; a first cap metal film provided to contact an upper portion of said interconnect layer and covering the upper portion of said interconnect layer; a conductive via provided on an upper portion of said first cap metal film and connected to said interconnect layer; a second cap metal film provided to contact an upper portion of said conductive via and covering the upper portion of said conductive via; an insulating film provided from a side wall of said interconnect layer to a side wall of said conductive via and formed so as to cover the side wall of said interconnect layer, the upper portion of said interconnect layer, and the side wall of said conductive via; and a reinforcing insulating film disposed under said insulating film and contact with a lower portion of the side wall of said interconnect layer, wherein a thickness of said reinforcing insulating film is substantially uniform and said reinforcing insulating film has greater film density than said insulating film, wherein said insulating film is provided with an air-gap in said insulating film, said air-gap being provided between said interconnect layer and a via layer including a plurality of said conductive vias in said insulating film.