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EP0652576A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method of manufacturing solid electrolytic capacitor

Assignee: Tokin Corp
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Filing: 1994-11-03
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Granted: —
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Expires: 2014-11-03
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Abstract

Abstract According to a method of manufacturing a solid electrolytic capacitor of the present invention, a surface of an anode consisting of a valve metal and having a lead (7) extending therefrom is oxidized to form a dielectric layer (2). A chemical oxidation and polymerization process is performed using an oxidant, and a first conductive polymer compound layer (3) is formed on the dielectric layer (2). An undoped polymer compound layer is formed on the first conductive polymer compound layer (3) using a solution containing a polymer compound polymerized in advance and soluble in an organic solvent, and then proton acid is doped in the undoped polymer compound layer to make the undoped polymer compound layer conductive to form a second conductive polymer compound layer (1). A cathode electrode (6) is formed on the second conductive polymer compound layer (4).

Inventors

  • 👤 Koji Sakata
  • 👤 Atsushi Kobayashi
  • 👤 Takashi Fukaumi

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-25 19:50
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/022; H01G9/025; H01G11/00; H01G11/22; H01G11/30; H01G11/48; H01G11/54; H01G11/56; H01G9/028; Y; Y02; Y02E; Y02E60/00; Y02E60/13

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 141 words
A method of manufacturing a solid electrolytic capacitor, characterized by comprising: the step of oxidizing a surface of an anode (1) consisting of a valve metal and having a lead (11) extending therefrom to form a dielectric layer; the step of forming a first conductive polymer compound layer (3) on said dielectric layer, the step including a chemical oxidation and polymerization process using an oxidant; the step of forming an undoped polymer compound layer (4) on said first conductive polymer compound layer using a solution containing a polymer compound polymerized in advance and soluble in an organic solvent, and then doping proton acid in said undoped polymer compound layer to make said undoped polymer compound layer conductive, thereby forming a second conductive polymer compound layer; and the step of forming a cathode electrode (6) on said second conductive polymer compound layer.
Claim 2
Dependent Claim 79 words
A method according to claim 1, wherein the step of forming said first conductive polymer compound layer includes the step of repeatedly performing, a plurality of times, a series of processes consisting of a process of dipping said anode, on which said dielectric layer is formed, in a solution containing an oxidant, a process of dipping said anode in a solution containing a pyrrole monomer, a process of performing chemical oxidation and polymerization, and a process of performing doping.
Claim 3
Dependent Claim 26 words
A method according to claim 2, wherein said first conductive polymer compound layer consists of polypyrrole, and said second conductive polymer compound layer consists of polyaniline.
Claim 4
Dependent Claim 79 words
A method according to claim 1, wherein the step of forming said first conductive polymer compound layer includes the step of repeatedly performing, a plurality of times, a series of processes consisting of a process of dipping said anode, on which said dielectric layer is formed, in a solution containing an oxidant, a process of dipping said anode in a solution containing an aniline monomer, a process of performing chemical oxidation and polymerization, and a process of performing doping.
Claim 5
Dependent Claim 21 words
A method according to claim 4, wherein said first and second conductive polymer compound layers are constituted by polyaniline films, respectively.
Claim 6
Dependent Claim 79 words
A method according to claim 1, wherein the step of forming said first conductive polymer compound layer comprises the step of forming an undoped polymer compound layer on said dielectric layer using a solution containing a polymer compound which is polymerized in advance and soluble in an organic solvent, and the step of doping proton acid in said undoped conductive polymer compound layer to make said undoped polymer compound layer conductive, thereby forming said second conductive polymer compound layer.
Claim 7
Dependent Claim 15 words
A method according to claim 1, wherein the valve metal constituting said anode is tantalum.

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