Patent ID: 7875982
Filing Date: 2011-01-25
Classification: H01L

Abstract:
1. A semiconductor device comprising: an interlayer insulation film; a lower interconnection layer located under the interlayer insulation film; an upper interconnection layer located above the interlayer insulation film; and a via hole extending through the interlayer insulation film to establish electric connection between an interconnection line residing in the lower interconnection layer and another interconnection line residing in the upper interconnection layer; wherein a plurality of interconnection lines extending along a predetermined direction is provided in the lower interconnection layer, and a contact region is formed for contact with the via hole by partially joining at least two interconnection lines, and a void exists in a first region of the interlayer insulation film located between adjacent interconnection lines out of the plurality of interconnection lines, and no void exists in a second region of the interlayer insulation film located between a contacting portion of the via hole in the contact region and an interconnection line adjacent to the contact region.