Patent ID: 6469359
Filing Date: 2002-10-22
Classification: H01L

Abstract:
A semiconductor device of planar structure comprising a pn-junction (10) formed by a first layer (1) doped according to a first conductivity type, n or p, and on top thereof a second layer (2) doped according to a second conductivity type opposite to said first conductivity type, said second layer having a higher doping concentration than the first layer and having a lateral edge thereof provided with an edge termination with second zones (3) of said second conductivity type separated by first zones (4) of said first conductivity type arranged so that the total charge and/or the effective sheet charge density of dopants according to said second conductivity type is decreasing towards the laterally outer border (8) of the edge termination, characterized in that a third layer (5) doped according to said first conductivity type is arranged on top of said second layer at least in the region of said edge termination for burying the edge termination of the device thereunder.