Patent ID: 8836072

Claim:
A semiconductor system, comprising: an n + -type substrate; an n-type epilayer which is located on the n + -type substrate and acts as a cathode zone; and a trench junction barrier Schottky diode having an integrated p-n type diode as a clamping element; wherein: the trench junction barrier Schottky diode is a combination of a Schottky diode and a p-n type diode; a breakdown voltage of the p-n type diode is lower than a breakdown voltage of the Schottky diode; at least two trenches are etched into the n-type epilayer and form an anode zone of the p-n type diode; and the trenches are each divided into a respective upper area filled with highly-doped p + Si or p + poly-Si, a respective middle area filled with low-doped p Si or p poly-Si, and a respective lower area filled with highly-doped p + Si or p + poly-Si.