Patent ID: 7772669
Filing Date: 2010-08-10
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate of a first conductivity type; a device region formed on a major surface of the semiconductor substrate; a guard ring region formed on the major surface of the semiconductor substrate, and surrounding the device region; a first diffusion layer of a second conductivity type formed in the device region; a first electrode formed over the first diffusion layer, and connected to the first diffusion layer; at least one second diffusion layer of the second conductivity type formed in the guard ring region apart from the first diffusion layer, and surrounding the device region; an insulating film, whose one end contacts the first electrode, coating the upper surface of the second diffusion layer in the guard ring region on the semiconductor substrate; at least one second electrode facing the at least one second diffusion layer, formed on an upper surface of the insulating film, whereby the at least one second electrode is insulated from the second diffusion layer by the insulating film; and a conductive film integrally formed across the upper surface of the insulating film between and in contact with the electrodes thereby electrically connecting the electrodes to each other.