Patent ID: 8310034
Filing Date: 2012-11-13
Classification: H01L

Abstract:
1. A semiconductor device including a digital region and an analog region embedded therein, the semiconductor device comprising: a substrate; an insulating interlayer formed over the substrate; a seal ring comprising a first electro-conductive film embedded in the insulating interlayer, and surrounding an outer circumference of the digital region and the analog region in a plan view; a guard ring comprising a second electro-conductive film embedded in the insulating interlayer, provided in an area surrounded by the seal ring, between the digital region and the analog region, so as to isolate the analog region from the digital region, and so as to be electrically connected to the seal ring; and a first electrode pad being electrically connected to the guard ring in the vicinity of the guard ring, wherein the second electro-conductive film of the guard ring is connected to the substrate, while being routed through an impurity-diffused layer having a same conductivity type as that of the substrate and a first well having a same conductivity type as the substrate, and wherein the first electro-conductive film of the seal ring is connected to the substrate through an impurity-diffused layer having a same conductivity type as that of the substrate and a second well having an opposite conductivity type to that of the substrate.