Patent ID: 8258573

Claim:
A vertical power semiconductor component comprising: a front side; a rear side; a lateral edge; a semiconductor body comprising a drift zone of a first conductivity type, a source zone of the first conductivity type, a body zone of a second conductivity type opposite the first conductivity type, and a drain zone; a gate which forms a MOS structure with the drift zone, with the source zone and with the body zone; an edge termination between the lateral edge and the MOS structure, the edge termination comprising a plurality of field rings of the second conductivity type, the field rings enclosing the MOS structure, the lateral edge being at the same potential as the drift zone, and the edge termination reducing voltage between the lateral edge and the source zone; a horizontally extending edge plate disposed at the front side between the lateral edge and the edge termination; a field plate lying above the edge plate, the field plate being connected to a field ring of the edge termination and electrically isolated from a source electrode connected to the source zone; a first insulation layer arranged between the edge plate and the field plate; and a second insulation layer arranged between the field plate and a conductive layer lying above the field plate, the conductive layer being isolated from the source electrode, wherein the field plate terminates before the edge and is covered laterally by an insulation layer, the conductive layer extends, at the edge, down onto the edge plate to form an electrical contact with the edge plate, the field plate forms a first plate of a plate capacitor structure and the edge plate and the conductive layer form a second plate of the plate capacitor structure.