Patent ID: 7674678
Filing Date: 2010-03-09
Classification: H01L

Abstract:
1. A method for producing a transistor component having a field plate, comprising: providing a semiconductor body having a first side and having at least one first trench extending into the semiconductor body proceeding from the first side; producing a field plate dielectric layer on the first side and at uncovered areas of the first trench in such a way that a residual trench remains; producing a field plate layer in the residual trench, including applying an electrically conductive layer on the field plate dielectric layer in such a way that the residual trench is completely filled, wherein the electrically conductive layer is applied in such a way that it covers the field plate dielectric layer above the first side of the semiconductor body; uncovering the first side of the semiconductor body by using a polishing method, wherein the electrically conductive layer is partially removed during the polishing method, such that the field plates are formed in the residual trenches; and partially removing the field plate dielectric layer from the at least one first trench proceeding from the first side.