Patent ID: 6924177

Claim:
A method for producing a thyristor which comprises: providing a first wafer and a second wafer; producing a first zone of a first conductivity type serving as an anode on the first wafer; producing a first section of a second zone of a second conductivity type serving as a base on the first wafer; producing a second section of the second zone of the second conductivity type serving as the base on the second wafer; producing a third zone of the first conductivity type on the second wafer; producing a fourth zone of the second conductivity type serving as a cathode on the second wafer; producing a field stop layer in the second zone of the second conductivity type in a region at an inner surface of one of the first wafer and the second wafer; connecting the first wafer to the second wafer such that the inner surface of the first wafer and the inner surface of the second wafer lie one on top of another; and producing the field stop zone by ion implantation with an ion dose of from 10 12 cm −2 to 10 13 cm −2 into a layer in a region at the inner surface of one of the first wafer and the second wafer and implanted atoms are electrically activated by a subsequent thermal treatment.