Patent ID: 7763520

Claim:
A method for manufacturing a capacitor device in a trench in a substrate, comprising: forming a conductive structure along a trench bottom and a trench wall; at least one-time performing of the following sequence: depositing a first part of a dielectric layer in the trench; depositing a conductive material in the trench; removing the conductive material on the trench bottom by anisotropic etching; depositing a second part of the dielectric layer; removing dielectric on the trench bottom by anisotropic etching; depositing conductive material in the trench; removing the conductive material on the trench bottom by anisotropic etching; depositing a third part of the dielectric layer in the trench; depositing conductive material in the trench and electrically connecting the conductive material on a side of the dielectric layer facing away from the substrate to a second electrode structure, wherein the conductive material in the trench on a side of the dielectric layer facing the substrate and a conductive structure along the trench bottom and the trench wall form the first electrode structure.