Patent ID: 8264064

Claim:
A semiconductor device comprising: a semiconductor substrate on which an internal circuit is formed in a central position; an insulating layer formed over the semiconductor substrate; and a moisture-resistant ring formed by a metal plug embedded in the insulating layer, the moisture-resistant ring surrounding the internal circuit, the moisture-resistant ring extending over the semiconductor substrate in a shape, the moisture-resistant ring including: a first extending portion linearly extending in the insulating layer and in a first direction in parallel to the surface of the semiconductor substrate; a vertical portion connected to the first extending portion extending in the insulating layer and in a second direction orthogonal to the first extending portion and in parallel to the surface of the semiconductor substrate; and a second extending portion linearly extending in the insulating layer and orthogonal to the vertical portion and in parallel to the surface of the semiconductor substrate, the second extending portion spaced apart from the first extending portion, the second extending portion crossing the vertical portion.