Patent ID: 6683347
Filing Date: 2004-01-27
Classification: H01L

Abstract:
A semiconductor device comprising:a layer with low electrical resistance having a first and second surface; an electrode on the second surface of the layer with low electrical resistance; a semiconductive substrate region having a first surface contacting the first surface of the layer with low electrical resistance and a surface opposing said first surface; at least one electrode on the opposing surface of the semiconductive substrate region; and the semiconductive substrate region including regions of a first conductivity type and regions of a second conductivity type, the regions of the first conductivity type and the regions of the second conductivity type extending vertically between said first and second surface of said semiconductive substrate region in parallel to each other and are arranged alternately with respect to each other horizontally; each of the regions of the first conductivity type including a plurality of vertically aligned second buried regions of the first conductivity type; and each of the regions of the second conductivity type comprising a plurality of vertically aligned first buried regions of the second conductivity type, wherein the semiconductive substrate region provides a current path when the semiconductor device is ON and is depleted when the semiconductor device is OFF, and wherein the first buried regions and the second buried regions exhibit respective concentration distributions caused by diffusion from respective limited impurity sources.