Patent ID: 7091115

Claim:
A method for doping a semiconductor body to produce doping centers in the semiconductor body, the method comprising: a) performing ion irradiation on the semiconductor body of a second conduction type; b) after step a) subjecting the semiconductor body to a first thermal treatment at about 400° C. to 500° C. and sufficient to cause doping of the first conduction type to prevail, c) after step b) performing a second thermal treatment in at least one specific region in the semiconductor body, the second thermal treatment is performed at a temperature which is chosen to be at least about 200° C. higher than a temperature of the first thermal treatment and is sufficient to weaken the doping of the first conduction type resulting from steps a) and b) in the at least one specific region such that the doping of the second conduction type prevails in said at least one specific region.