SOLID ELECTROLYTIC CAPACITOR AND METHOD FOR PRODUCING SAME
First Claim
1. A solid electrolytic capacitor comprising a solid electrolyte comprised of an electroconductive polymer, formed on a metal substrate with a valve action having a dielectric film formed on the surface thereof, characterized in that said dielectric film has a thickness of at least 30 m and said solid electrolyte contains 0.1% to 20% by mol, based on the total monomer units constituting the electroconductive polymer, of an anion of an aromatic compound as dopant.
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Accused Products
Abstract
A solid electrolytic capacitor comprising a solid electrolyte comprised of an electroconductive polymer, formed on a metal substrate with a valve action having a dielectric film formed on the surface thereof, characterized in that the dielectric film has a thickness of at least 30 nm, and the solid electrolyte contains 0.1% to 20% by mol, based on the total monomer units constituting the electroconductive polymer, of an anion of an aromatic compound, preferably an aromatic polycyclic compound having an aromatic polycyclic structure as basic skeleton and containing a Brφnsted acid group, as a dopant.
11 Citations
11 Claims
- 1. A solid electrolytic capacitor comprising a solid electrolyte comprised of an electroconductive polymer, formed on a metal substrate with a valve action having a dielectric film formed on the surface thereof, characterized in that said dielectric film has a thickness of at least 30 m and said solid electrolyte contains 0.1% to 20% by mol, based on the total monomer units constituting the electroconductive polymer, of an anion of an aromatic compound as dopant.
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7. A process for producing a solid electrolytic capacitor comprising:
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at least one cycle comprising steps of coating a metal substrate having a valve action, having a dielectric film, formed on the surface of the substrate, with a solution containing an electroconductive polymer-forming monomer, and then drying the thus-formed liquid coating, and at least one cycle comprising steps of coating the metal substrate having a valve action, having formed thereon the dielectric film, with a solution containing an oxidizing agent, and then drying the thus-formed coating of the oxidizing agent-containing solution, whereby said monomer is polymerized to form an electroconductive polymer constituting a solid electrolyte; characterized in that a metal substrate having formed thereon a dielectric film with a thickness of at least 30 nm is used, and a solution containing an anion of an aromatic compound in addition to the oxidizing agent is used as the oxidizing agent-containing solution, to form an electroconductive polymer containing 0.1% to 20% by mol, based on the total monomer units constituting the electroconductive polymer, of the anion of the aromatic compound as a dopant. - View Dependent Claims (8, 9, 10, 11)
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Specification