Patent ID: 7960285

Claim:
A method, comprising: providing a body having a first side; producing a first trench and a second trench, which extend into the semiconductor body proceeding from the first side and which are arranged at a distance from one another in a lateral direction of the semiconductor body; producing a first material layer in the first trench; producing a third trench proceeding from the second trench, which extends as far as the first material layer in the first lateral direction; wherein the third trench has a first sidewall, which is formed by the first material layer, and a second sidewall, which lies opposite the first sidewall; and producing a second material layer in the third trench at least at the second sidewall, wherein producing the second material layer furthermore comprises: applying a material layer composed of a material of the first material layer to the sidewalls and a bottom of the third trench, and removing the material layer from the bottom of the third trench and/or removing the material layer from the first sidewall.