Patent ID: 8039963

Claim:
A semiconductor device, comprising: a substrate; an element-forming region formed on the substrate, and having a via and a wiring formed therein; and a seal ring formed on the substrate, said seal ring being formed on an outer circumference of the element-forming region to surround the element-forming region, the seal ring including a first metal layer having a through hole formed therein to surround the element-forming region, and a second metal layer formed on the first metal layer to be in contact with the first metal layer, wherein, in the through hole in the first metal layer, a lower part thereof is provided with an insulating material formed thereon, and an upper part, that is not provided with the insulating material formed thereon, is provided with a metal material, which constitutes the second metal layer, formed to project into the upper part, and wherein in an entire region of the through hole, the upper part of the through hole is provided with the metal material.