Patent ID: 8134179

Claim:
A diode comprising: a crystalline substrate composed of a semiconductor material; a doped region of a first conductivity type formed at a surface of the substrate; a semiconductor layer, which is applied on the surface of the substrate above the doped region and which has a doping of a second conductivity type; a pn junction at a boundary between the doped region and the semiconductor layer; an insulation zone formed at the surface of the substrate, the doped region being enclosed by the insulation zone; an insulation layer arranged on the crystalline substrate; a polysilicon layer arranged above the insulation layer; and a window in the insulation layer and the polysilicon layer, the window being dimensioned such that the doped region and a portion of the insulation zone adjacent to the doped region are uncovered; wherein, in lateral areas of the doped region, the pn junction is arranged in the substrate at a distance from the boundary between the surface of the substrate and the semiconductor layer.