Patent ID: 7084029

Claim:
A method for fabricating a storage capacitor for a memory cell of a semiconductor memory device in a semiconductor substrate, comprising: applying a protective layer to a substrate surface of the semiconductor substrate; introducing a hole trench into the semiconductor substrate through the protective layer; forming an outer electrode in an electrode section of the semiconductor substrate the outer electrode surrounding a lower section of the hole trench; lining the hole trench with a capacitor dielectric at least in the lower section; providing an inner electrode in the interior of the hole trench; and forming a transition surface between the inner electrode and a conductive connection structure formed in a connection section of the semiconductor substrate, the transition surface conductive connection structure surrounding an upper section of the hole trench, wherein forming the transition surface includes providing the inner electrode such that the inner electrode extends to beyond the substrate surface and in sections adjoins the protective layer, removing the protective layer, and growing an additional layer on the substrate surface by a selective epitaxy process, the additional layer thickening and the semiconductor substrate and providing the conductive connection structure in the additional layer such that the transition surface is formed above the original substrate surface.