Patent ID: 8508002

Claim:
A semiconductor device, comprising: a substrate including a chip region; a plurality of dielectric films formed on the substrate; seal rings formed in a peripheral part of the chip region, the seal rings including a first seal ring and a second seal ring both provided through the plurality of dielectric films in the peripheral part of the chip region; a protection film formed on a first dielectric film which is an uppermost film among the plurality of dielectric films; a first opening provided in the protection film and formed on the first seal ring; and a cap layer disposed in the first opening and in contact with the first seal ring, wherein: the first seal ring is disposed outside of the second seal ring and surrounds the second seal ring, an entirety of an upper surface of the second seal ring is covered by the protection film, a width of the first opening is larger than a width of the first seal ring formed in the first dielectric film, and both of side surfaces of the first opening are disposed on a region other than an upper surface of the first seal ring, and a thickness of a center of the cap layer in a depth direction is larger than a thickness of the protection film in the depth direction.