Method of producing tantalum dry-electrolytic capacitors
AssigneeSiemens Aktiengesellschaft
InventorWerner Schnabel
Life of this patent
Estimating the term…
Abstract
A method of producing a tantalum dry-electrolytic capacitor which comprises a sintered tantalum anode having applied thereto, by a forming process, an dielectric oxide layer and a semiconducting manganese dioxide cathode layer, with the latter being coated with a graphite layer serving as current supply, in which, after formation of the manganese dioxide layer, a thin layer of manganese dioxide is removed from the surface thereof by chemical treatment, following which the cathode is coated with the desired graphite layer.
Claims8
A method of producing a tantalum dry-electrolytic capacitor comprising a sintered tantalum anode, oxidized to form a dielectric layer, and a semiconducting manganese dioxide cathode layer which is coated with a graphite layer serving as current supply, characterized in that after the formation of the manganese dioxide layer a thin layer of manganese dioxide is removed from the surface thereof by chemical treatment in an acetic acid-hydrogen peroxide bath, following which the cathode is coated with said graphite layer.
Dependencies are inferred from the claim text.