Patent ID: 8395244

Claim:
A fast recovery diode comprising: an n-doped base layer having a cathode side and an anode side opposite the cathode side; a p-doped anode layer on the anode side, the anode layer having a doping profile and comprising at least two sublayers, which are arranged parallel to the anode side, wherein: the at least two sublayers comprise a first sublayer and a last sublayer; the first sublayer has a first maximum doping concentration, which is between 2*10 16 cm −3 and 2*10 17 cm −3 , the first maximum doping concentration being higher than the maximum doping concentration of any other sublayer of the at least two sublayers; the last sublayer having a last sublayer depth, which is larger than any other sublayer depth, the last sublayer depth being between 90 to 120 μm; the doping profile of the anode layer declines such that a doping concentration in a range of 5*10 14 cm −3 and 1*10 15 cm −3 is reached between a first depth, which is at least 20 μm, and a second depth, which is at maximum 50 μm; and wherein the at least two sublayers are aluminum diffused layers.