EP0654804A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Solid electrolytic capacitor
Assignee: NEC Corp
•
Filing: 1994-11-15
•
Granted: —
•
Expires: 2014-11-15
Abstract
Abstract A solid electrolytic capacitor includes an anode, a dielectric layer, a solid electrolyte layer, and a cathode electrode. The solid electrolyte layer consists of a conductive polymer compound obtained by doping a dopant in one of a copolymer and a mixture of polypyrrole or a derivative thereof, the polypyrrole having a repetition unit represented by a formula wherein each of R 1 to R 3 represents an alkyl group or a hydrogen atom, and polyaniline or a derivative thereof, the polyaniline having a repetition unit represented by a formula wherein each of R 4 to R 7 represents an alkyl group or a hydrogen atom.
Inventors
- 👤 Toshihiko C/O Nec Corporation Nishiyama
- 👤 Koji C/O Nec Corporation Sakata
- 👤 Takashi C/O Nec Corporation Fukaumi
- 👤 Atsushi C/O Nec Corporation Kobayashi
- 👤 Satoshi C/O Nec Corporation Arai
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 06:20
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: 6
Claim 1
Independent Claim
148 words
A solid electrolytic capacitor, characterized by comprising: an anode (1) consisting of a valve metal and having a lead (11) extending therefrom; a dielectric layer (2) constituted by an oxide coating formed by oxidizing a surface of said anode; a solid electrolyte layer (3) formed on said dielectric layer; and a cathode electrode (6) formed on said solid electrolyte layer, wherein said solid electrolyte layer consists of a conductive polymer compound obtained by doping a dopant in one of a copolymer and a mixture of polypyrrole or a derivative thereof, the polypyrrole having a repetition unit represented by a formula wherein each of R 1 to R 3 represents an alkyl group or a hydrogen atom, and polyaniline or a derivative thereof, the polyaniline having a repetition unit represented by a formula wherein each of R 4 to R 7 represents an alkyl group or a hydrogen atom.
Claim 2
Dependent Claim
148 words
A solid electrolytic capacitor, characterized by comprising: an anode (1) consisting of a valve metal and having a lead (11) extending therefrom; a dielectric layer (2) constituted by an oxide coating formed by oxidizing a surface of said anode; a solid electrolyte layer (3) formed on said dielectric layer; and a cathode electrode (6) formed on said solid electrolyte layer, wherein said solid electrolyte layer consists of a conductive polymer compound obtained by doping a dopant in one of a copolymer and a mixture of polypyrrole or a derivative thereof, the polypyrrole having a repetition unit represented by a formula wherein each of R 1 to R 3 represents an alkyl group or a hydrogen atom, and polyaniline or a derivative thereof, the polyaniline having a repetition unit represented by a formula wherein each of R 4 to R 7 represents an alkyl group or a hydrogen atom.
Claim 3
Dependent Claim
48 words
A capacitor according to claim 1, wherein said solid electrolyte layer is constituted by a conductive polymer compound layer formed by a chemical oxidation and polymerization process, and said conductive polymer compound layer having a predetermined thickness is formed by repeatedly performing the chemical oxidation and polymerization process.
Claim 4
Dependent Claim
41 words
A capacitor according to claim 1, wherein the anode having said dielectric layer formed on a surface thereof is dipped in a solution mixture of pyrrole and aniline and then dipped in an oxidant solution, thereby forming said solid electrolyte layer.
Claim 5
Dependent Claim
76 words
A capacitor according to claim 1, wherein, after said anode having said dielectric layer formed on a surface thereof is dipped in a solution mixture which is obtained by mixing a solution mixture of pyrrole and aniline with an oxidant solution and has a temperature kept lower than a temperature at which a polymerization reaction progresses, the polymerization reaction is caused to progress in an atmosphere at a predetermined temperature, thereby forming said solid electrolyte layer.
Claim 6
Dependent Claim
44 words
A capacitor according to claim 1, wherein said anode consists of a tantalum sintered body formed by sintering a tantalum powder, and said dielectric layer is constituted by a tantalum oxide coating formed on said tantalum sintered body by anodizing said tantalum sintered body.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.