Patent ID: 7485972
Filing Date: 2009-02-03
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate of a first conduction type a diffusion layer of a second conduction type on an inside surface portion of the semiconductor substrate, the second conduction type being an opposite of the first conduction type; an insulating film on a surface of said substrate and said diffusion layer, and a conductive bonding pad on said insulating film, above said diffusion layer, the horizontal edges of said conductive bonding pad extending beyond the horizontal edges of said diffusion layer of the second conduction type, thereby diminishing electric fields at ends of the diffusion layer and improving a breakdown voltage of a PN junction at a boundary of the diffusion layer and the semiconductor substrate, wherein a diffusion layer of the second conduction type is not formed on a surface region of the semiconductor substrate directly under a horizontal edge of the bonding pad, the surface region being the semiconductor substrate of a first conduction type that extends continuously from a PN junction of the diffusion layer.