Patent ID: 7045831

Claim:
A semiconductor device, comprising: a semiconductor chip; first and second metal layers formed on a first main surface of said semiconductor chip; a first conductive layer layered on a second main surface of said semiconductor chip, consisting of a plurality of conductive films; a second conductive layer layered on said first metal layer, having a layered structure consisting of a plurality of conductive films formed in the same order as in said first conductive layer as viewed from said semiconductor chip; and a third conductive layer layered on said second metal layer, having a layered structure consisting of a plurality of conductive films formed in the same order as in said first conductive layer as viewed from said semiconductor chip, wherein said plurality of conductive films comprise a nickel film; and a low contact resistance conductive film having contact resistance with said semiconductor chip which is lower than that of said nickel film, and wherein said low contact resistance conductive film and said nickel film are formed in this order from said semiconductor chip.