Patent ID: 6597052
Filing Date: 2003-07-22
Classification: H01L

Abstract:
A semiconductor device comprising a semiconductor body (10) including a substrate (11) and a stack of a first semiconductor region (1) of a first conductivity type having a first doping concentration, a second semiconductor region (2) having a second doping concentration, which is lower than the first doping concentration, a third semiconductor region (3) of a second, opposite conductivity type having a third doping concentration ranging between the first and the second doping concentration, a fourth semiconductor region (4) of the first conductivity type having a fourth doping concentration, which is higher than the third doping concentration, the first and the fourth semiconductor regions (1, 4) being provided with an electrical connection conductor (5, 6), one (5) of which is situated on the side of the substrate (11) and the other (6) is situated at the surface of the semiconductor body (11), an electric voltage being applied across said connection conductors during operation of the device, the thickness and the doping concentration of the second and the third semiconductor region (2, 3) being chosen to be such that they are completely depleted during operation, characterized in that the first semiconductor region (1) adjoins the surface of the semiconductor body (10), and the fourth semiconductor region (4) is situated on the side of the substrate (11).