Patent ID: 6552370
Filing Date: 2003-04-22
Classification: H01L

Abstract:
A bidirectional switch including:a semiconductor substrate of a first type of conductivity having a front surface side and a rear surface side; a layer of a second type of conductivity on the rear surface side; a deep diffusion of the second type of conductivity connecting the layer to the front surface side; a first well of the second type of conductivity on the front surface side, the first well containing a first region of the first type of conductivity; a second well of the second type of conductivity on the front surface side; second region of the first type of conductivity on the rear surface side, the second region substantially facing the second well; a third well of the second type of conductivity on the front surface side, the third well containing a third region of the first type of conductivity; a first metallization on the rear surface side corresponding to a first main electrode; a second metallization on the front surface side covering an upper surface of the first region and an upper surface of the second well, and corresponding to a second main electrode; a third metallization covering one of the third well and the third region, the third metallization being connected to a gate terminal; and a fourth metallization connecting the other one of the third well and the third region that is not covered by the third metallization to an upper surface of deep diffusion.