Patent ID: 6229196
Filing Date: 2001-05-08
Classification: H01L,Y10S

Abstract:
A semiconductor device comprising:a first semiconductor layer of a first conductivity type;a second semiconductor layer of a second conductivity type at a relatively high concentration, compared to said first semiconductor layer, provided to form an interface with a first main surface of said first semiconductor layer;a gettering layer provided on an upper part of a first main surface of said second semiconductor layer on the opposite side to the interface with said first semiconductor layer to form an interface with said first main surface of said second semiconductor layer, for segregating metal impurities;a first main electrode provided to be in direct contact with at least a first main surface of said gettering layer on the opposite side to the interface with said second semiconductor layer; anda second main electrode provided on a second main surface of said first semiconductor layer on the opposite side to said first main surface of said first semiconductor layer.