US Patent 7687884 Manufacture of solid state capacitors

Manufacturing multiple solid state capacitors includes providing a metal substrate layer; forming on an upper surface of the substrate layer a plurality of upstanding bodies consisting of porous sintered valve-action metal; forming a dielectric layer on the bodies; forming a cathode layer on the dielectric layer; coating a top end of each upstanding body with at least one conducting intermediary layer by liquid or vapor phase deposition or by application of an immobilized flowable composition such as a solidifiable paste; forming an intimate physical contact between the cathode layer and the intermediate layer; encapsulating side walls of each body with an electrically insulating material; and dividing the processed substrate into a plurality of individual capacitor bodies each having a sleeve of encapsulating material, an anode terminal surface portion at one end consisting of exposed substrate and a cathode terminal surface portion at the other end consisting of exposed intermediary layer.