Patent ID: 7303970

Claim:
Method for fabricating a capacitive element, comprising the steps of: a) providing a substrate which serves as a first electrode layer of the capacitive element; b) conditioning the substrate provided as a first electrode layer; c) depositing a dielectric layer on the conditioned substrate; c1) depositing a reaction layer on the dielectric layer; c2) heat-treating a layer stack formed in steps a), b), c) and c1) in such a way that the dielectric layer deposited on the conditioned substrate reacts with the reaction layer by means of a solid phase reaction so that the dielectric layer and the reaction layer convert into a dielectric mixed layer wherein the heat treatment comprises a reoxidation in an oxygen-containing environment selected from ozone, atomic or molecular oxygen, or oxygen plasma, or a moisture oxidation; c3) depositing a further dielectric layer on the dielectric mixed layer; c4) depositing a further reaction layer on the further dielectric layer; c5) heat-treating a layer stack formed in steps a), b), c1), c2), c3) and c4) in such a way that the further dielectric layer reacts with the further reaction layer by means of a solid phase reaction so that the further dielectric layer and the further reaction layer convert into a further dielectric mixed layer; and d) depositing a second electrode layer.