Patent ID: 7977795
Filing Date: 2011-07-12
Classification: G06F,H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate; an interlayer insulating film formed on the semiconductor substrate; a protective film formed on the interlayer insulating film, the protective film having a higher density than that of the interlayer insulating film; at least one of a wiring and a dummy wiring formed in the interlayer insulating film and the protective film; a chip ring formed in the interlayer insulating film that surrounds the at least one of the wiring and the dummy wiring; and a wall formed in the interlayer insulating film so as to be entirely surrounded by the chip ring and that entirely surrounds a first region, a second region being entirely surrounded by the chip ring and not surrounded by the wall, the wall formed at a position such that a first sum of covering densities of the at least one of the wiring and the dummy wiring in the first region is less than a second sum of covering densities of the at least one of the wiring and the dummy wiring in the second region.