Patent ID: 7737547

Claim:
A semiconductor device, comprising: a semiconductor substrate including a first face and a second face opposite said first face, and further including a chip area on said first face and a plurality of interconnect section formation areas in said chip area; a first insulation film on said first face of said semiconductor substrate, covering an element in said chip area; buried contacts in one or more contact holes, the contact holes are in said interconnect section formation areas of said first insulation film and reach said element through said first insulation film; dummy buried contacts in a plurality of dummy contact holes arranged outside of and around said interconnect section formation areas, the dummy buried contacts reach said first face through said first insulation film without connection to said element; a first interconnect layer including a plurality of first interconnect sections each having a first edge electrically connected to said buried contacts and a second edge extending on a surface of said first insulation film, and including first dummy interconnect sections connected to the dummy buried contacts; a second insulation film covering said surface of said first insulation film and said first interconnect layer; a buried via in a via hole, the buried via extends through said second insulation film to reach said second edge of one of said first interconnect sections; dummy buried vias in a plurality of dummy via holes, the dummy buried vias respectively reach parts of said plurality of first dummy interconnect sections; and a second interconnect layer including a second interconnect section which is electrically connected to said buried via and extends on a surface of said second insulation film, and including second dummy interconnect sections connected to said dummy buried vias, wherein each one of said dummy buried contacts are at a same distance from each adjoining one of said dummy buried contacts positioned in any one of front and aft directions and in any one of left and right directions, said dummy buried contacts surrounding each one of said buried contacts.