Patent ID: 7777274
Filing Date: 2010-08-17
Classification: H01L

Abstract:
1. A power semiconductor component comprising: a semiconductor body having a drift zone of a first conduction type, a junction between the drift zone and a further component zone, the junction configured to cause a space charge zone to propagate in a first direction when a reverse voltage is applied to the junction, a field electrode arranged adjacent to the drift zone in a second direction, the field electrode insulated from the semiconductor body by at least a dielectric layer, the dielectric layer having a first section and a second section, the first section arranged nearer to the junction; and wherein the dielectric layer has a first dielectric layer and a second dielectric layer, the first section including the first dielectric layer which is arranged between the field electrode and the drift zone, the second section including the first dielectric layer and the second dielectric layer which are each arranged between the field electrode and the drift zone, wherein the first dielectric layer has a higher dielectric constant than the second dielectric layer.