Patent ID: 8823147
Filing Date: 2014-09-02
Classification: H01L

Abstract:
1. A semiconductor substrate having doped zones forming a P-N junction, the doped zones comprising: a first zone doped with a first type of doping; a second zone doped with a second type of doping; and a third zone doped with the second type of doping, the third zone being located between the first zone and the second zone, the concentration of doping element of the third zone being lower than the concentration of doping element of the first zone and lower than the concentration of doping element of the second zone; wherein the P-N junction of the substrate further comprising a fourth doped zone having: a first portion in contact with the first zone; and a second portion in contact with the third zone, said second portion extending in the direction of the second zone, and not being in contact with the second zone; said fourth zone being doped with the same type of doping as that of the first zone, and the concentration of doping element of the fourth zone is greater than the highest concentration of doping element of the first zone.