Patent ID: 7902626

Claim:
A semiconductor device, comprising: a trench-Schottky-bather-Schottky diode; and an integrated pn diode arranged as a contact element; wherein: an n silicon epilayer is located on an n+ substrate and is used as a cathode zone; in two-dimensional representation, at least two etched-in trenches are located in the n silicon epilayer, and their lower regions are filled in using at least one of (a) p-doped Si and (b) poly-Si, and are used as the anode zone of the pn diode; a depth of the trenches is greater than a width of silicon regions located between the trenches; a first metal fills in the trenches up to a specified height, having ohmic contact to the at least one of (a) the p-doped Si and (b) the poly-Si, and having Schottky contact to the n silicon epilayer and arranged as an anode electrode; and a second metal fills in a rest of the trenches, having Schottky contact to the n silicon epilayer and arranged as an anode electrode.