Patent ID: 9711599
Date: 2017-07-18
CPC Classifications: H01L

Claim:
1. A switching device, comprising: a body of semiconductor material having a substantially planar surface and a bulk portion of a first conductivity type; implanted switching regions of a second conductivity type, the implanted switching regions extending in the body to a first depth from the surface; non-masked implanted surface portions extending in the body to a second depth from the surface, the second depth being less than the first depth, the implanted surface portions extending between respective pairs of the implanted switching regions and having the first conductivity type, the implanted surface portions having a higher conductivity level than the bulk portion and being sandwiched between and delimited by the respective pairs of the implanted switching regions; Schottky contact metal portions on the surface and in direct contact with the implanted surface portions; and ohmic contact metal portions on the surface and in direct contact with the implanted switching regions, wherein the Schottky contact metal portions and the ohmic contact metal portions are respective portions of a first metal layer having homogeneous chemical-physical characteristics, said first metal layer being a single, continuous layer over the implanted surface portions and implanted switching regions.