Patent ID: 6888226

Claim:
A semiconductor structure comprising: a base layer of a first conductivity type; a first layer of the first conductivity type arranged on the base layer and having a dopant concentration which is lower than a dopant concentration of the base layer; and a second layer of a second conductivity type being operative with the first layer in order to form a junction between the first conductivity type and the second conductivity type; wherein a course of a dopant profile is set step-shaped at the transition between the base layer and the first layer starting from a first dopant concentration in the first layer via a second dopant concentration in the base layer to a third dopant concentration in the base layer, wherein the third dopant concentration is higher than the first dopant concentration and the second dopant concentration, and wherein the second dopant concentration is higher than the first dopant concentration, and wherein the first dopant concentration is 10 16 atoms/cm 3 , the second dopant concentration is 10 17 atoms/cm 3 and the third dopant concentration is 10 19 atoms/cm 3 .