Patent ID: 6690085
Filing Date: 2004-02-10
Classification: H01L

Abstract:
A semiconductor device, comprising:a first n-type semiconductor region formed on an n-type semiconductor body, said first n-type semiconductor region having an electric resistance higher than that of the n-type semiconductor body; a first p-type semiconductor region formed on said first n-type semiconductor region; an anode formed on said first p-type semiconductor region; a second n-type semiconductor region formed on the n-type semiconductor body, said second n-type semiconductor region having an electric resistance higher than that of the n-type semiconductor body; a second p-type semiconductor region formed on said second n-type semiconductor region, said second p-type semiconductor region being placed in an electrically floating condition due to the absence of said anode on said second p-type semiconductor region; a high-resistance region formed in said first and second n-type and first and second p-type semiconductor regions, said high-resistance region being in contact with said first and second n-type and first and second p-type semiconductor regions and extending from an upper surface of said first and second p-type semiconductor regions in a direction of the n-type semiconductor body; and a cathode formed on a surface facing the surface of the n-type semiconductor body, on which said first and second semiconductor regions are formed.