Patent ID: 6927427

Claim:
A monolithic bidirectional switch formed in a semiconductor substrate of a first conductivity type having a front surface and a rear surface, including: in a first area, a first main vertical thyristor having a rear surface layer of the second conductivity type, adjacent to a second main vertical thyristor having a rear surface layer of the first conductivity type; a triggering area arranged on the front surface side, apart from the first area, this triggering are including a well of the second conductivity type in which is formed a region of the first conductivity type; a first main electrode metallization, covering the rear surface; a second main electrode metallization on the front surface layers of the first and second thyristors; a third gate metallization on said well; on the rear surface side, an additional region of the second conductivity type and an insulating layer interposed between this additional region and the first rear surface metallization, said additional region extending under the triggering area and partially under the first area and being separated from rear surface layers of the first and second thyristors; and a fourth metallization on said region.