Solid Electrolytic Capacitor Containing A Sequential Vapor-Deposited Interior Conductive Polymer Film
AssigneeAVX Corporation
InventorsMitchell D. Weaver, Jan Petrzilek
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Abstract
A capacitor comprising a solid electrolytic capacitor element that a sintered porous anode body, a dielectric that overlies the anode body, and a solid electrolyte is provided. The solid electrolyte contains an interior conductive polymer film that overlies the dielectric, which may be formed by sequential vapor deposition. An exterior conductive polymer layer also overlies the interior conductive polymer film.
Claims30
A capacitor comprising a solid electrolytic capacitor element that contains a sintered porous anode body, a dielectric that overlies the anode body, and a solid electrolyte, wherein the solid electrolyte contains an interior conductive polymer film formed by sequential vapor deposition that overlies the dielectric and an exterior conductive polymer layer that overlies the interior conductive polymer film.
A capacitor comprising a solid electrolytic capacitor element that contains a sintered porous anode body, a dielectric that overlies the anode body, and a solid electrolyte, wherein the solid electrolyte contains an interior conductive polymer film that overlies the dielectric and an exterior conductive polymer layer that overlies the interior conductive polymer film, wherein the interior film has a thickness of about 10 nanometers or ore and an intrinsic conductivity of about 1,000 S/cm or more as determined at a temperature of about 25° C.
A method for forming a solid electrolytic capacitor element, the method comprising:
- positioning a capacitor element with a reactor vessel, wherein the capacitor element comprises a sintered porous anode body and a dielectric overlying the anode body;
- forming a film on the capacitor element by a sequential vapor deposition process, the process including subjecting the capacitor element to a reaction cycle that includes contacting the capacitor element with a gaseous precursor compound that bonds to a surface of the capacitor element and thereafter contacting the capacitor element with a gaseous oxidizing agent to oxidize and/or polymerize the precursor compound;
- and
- applying an exterior conductive polymer layer over the film.
Dependencies are inferred from the claim text.