Patent ID: 7795705
Filing Date: 2010-09-14
Classification: H01L

Abstract:
1. A semiconductor device, comprising: an element formed on a substrate; an insulating film formed on the substrate; a seal ring formed in the insulating film so as to surround a region where the element is formed and to extend through the insulating film; and a void region including at least one void and formed in the insulating film in a region located outside the seal ring when viewed from the element, wherein: the insulating film has a layered structure of a plurality of interlayer insulating films, and includes a via formed in at least one of the plurality of interlayer insulating films and electrically connected to the element, and an interconnect formed in at least one of the plurality of interlayer insulating films and electrically connected to the element, the seal ring includes a seal via formed in the interlayer insulating film in which the via is formed, and a seal interconnect formed in the interlayer insulating film in which the interconnect is formed, and the void region includes a void formed at least in the interlayer insulating film in which the seal interconnect is formed, the interconnect and the via are respectively formed in different interlayer insulating films of the plurality of interlayer insulating films, and the interlayer insulating film in which the interconnect is formed is made of a film having a lower dielectric constant than that of the interlayer insulating film in which the via is formed.