Patent ID: 7611615

Claim:
An electrophoretic process for producing a porous metal electrode, wherein said electrode comprises a metal, capable of forming a stable oxide layer having a dielectric constant equal to or greater than 20, selected from the group consisting of tantalum and niobium, wherein said metal electrode comprises a substantially uniform porous layer of deposited particles of said metal having a porosity degree in the range of 30 to 50% deposited thereon, which process comprises the steps of: (a) providing a metal suspension of said metal in a polar solvent; (b) immersing a temporary cathode and a counter electrode in said suspension, and running a pre-processing initiating step by electrifying said temporary cathode as a deposition electrode; (c) replacing said temporary cathode with a new deposition electrode wherein said new deposition electrode is constituted by a metal foil; and (d) electrifying said new deposition electrode, so to cause electrophoretic homogeneous deposition of said metal particles onto the surface of said new deposition electrode.