Patent ID: 7518215
Filing Date: 2009-04-14
Classification: H01L

Abstract:
1. A semiconductor structure comprising: a hyperabrupt junction located in an anode region of a semiconductor substrate; and at least one compensated cathode contact located in a cathode contact region of said semiconductor substrate and adjacent to, yet isolated from, said hyperabrupt junction, said at least one compensated cathode contact extends to an upper surface of said semiconductor substrate and vertically abuts a surface of a dopant region of a first conductivity type which lies directly on a surface of a reach-through dopant region, wherein an entirety of said at least one compensated cathode contact including an upper region thereof is of said first conductivity type, said at least one compensated cathode contact having a higher concentration of first conductivity type dopants as compared to said dopant region and said reach-through dopant region, and said reach-through dopant region is of the first conductivity type and is in contact with an underlying subcollector or cathode region.