Patent ID: 6078065
Filing Date: 2000-06-20
Classification: H01L

Abstract:
A bilaterally controllable thyristor comprising, in a semiconductor body,(a) between a first main surface and a second main surface, a first thyristor structure having a first anode region, a first n-type base, a first p-type base, a first cathode region and a first central gate region and, reverse-connected in parallel therewith, a second thyristor structure having a second anode region, a second n-type base, a second p-type base, a second cathode region and a second central gate region, the first anode region, the second cathode region and the second gate region being assigned to the first main surface and the second anode region, the first cathode region and the first gate region being assigned to the second main surface;on both main surfaces, a respective isolation region which is arranged between the two thyristor structures between the first anode region and the second cathode region and between the second anode region and the first cathode region; as well as(c) short-circuit regions which short circuit the first and second p-type bases through the first and second cathode regions, respectively, with a metallization layer which covers the cathode regions;wherein a density per unit area of the short-circuit regions increases toward the isolation region and assumes a maximum value directly adjacent to the isolation region, andwherein the short-circuit regions comprise short-circuit region running along the isolation regions.