Solid electrolyte deposition on anodized pellets
AssigneeSprague Electric Company
InventorMelvin Tierman
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Abstract
A porous anode valve-metal pellet is anodized, impregnated with a manganese nitrate solution containing a surfactant, and subjected to pyrolysis to convert the manganese nitrate to manganese dioxide. The surfactant reduces ridging of the manganese dioxide during pyrolysis.
Claims8
A process for manufacturing a solid electrolytic capacitor comprising anodizing a porous valve metal pellet to form an anodic oxide coating thereon, impregnating said anodized pellet with a solution of manganese nitrate containing a surfactant chosen from the group of nonionic, amphoteric, and polyelectrolyte surfactants, subjecting said impregnated pellet to pyrolysis to convert said manganese nitrate to manganese dioxide whereby said surfactant reduces ridging of said manganese dioxide during said pyrolysis conversion, and forming a cathode layer on said anodized pellet.
Dependencies are inferred from the claim text.