Patent ID: 6325831
Filing Date: 2001-12-04
Classification: H01G

Abstract:
A method for producing an anode by creating a porous layer with an increased surface roughness on an aluminum foil as a substrate in a vacuum, said method comprising:first vapor-depositing an alloy comprising aluminum and a metal whose oxide has a higher dieletric constant than aluminum oxide with a metal vapor beam onto the aluminum foil, wherein an angle of incidence between the metal vapor beam and a surface normal of the aluminum foil is equal to or greater than 75.degree.;second vapor-depositing the alloy with the metal vapor beam onto the aluminum foil, wherein an angle of incidence between the metal vapor beam and the surface normal of the aluminum foil is between 40.degree. and 60.degree.;third vapor-depositing the alloy with the metal vapor beam onto the aluminum foil; andsubjecting the alloy to anodic oxidation.