US4959753A
Expired / Lapsed
US
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Solid electrolytic capacitor and method of manufacturing the same
Assignee: Panasonic Holdings Corp
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Filing: 1989-09-08
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Granted: 1990-09-25
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Expires: 2009-09-08
Abstract
Abstract A solid electrolytic capacitor comprising: an electrolyte comprising a conductive polymer (i) having a repeating unit of at least one compound selected from a heterocyclic compound and (ii) containing as a dopant at least one anion selected from a napthalenesulfonate, an alkyl naphthalenesulfonate at least one of hydrogen atoms on the naphthalene ring of which has been substituted with an alkyl group having 1 to 12 carbon atoms, an anthraquinoesulfonate, and an alkyl anthraquinonesulfonate at least one of hydrogen atoms on the anthraquinone ring of which has been substituted with an alkyl group having 1 to 12 carbon atoms; said electrolyte being provided on a valve metal on the surface of which a dielectric film is formed by anodic oxidation or anodic chemical conversion. Also disclosed is a method of manufacturing the solid electrolytic capacitor, in which the electrolyte is formed by electrolytic polymerization.
Inventors
- 👤 Yasuo Kudoh
- 👤 Sohji Tsuchiya
- 👤 Toshikuni Kojima
- 👤 Masao Fukuyama
- 👤 Susumu Yoshimura
- 👤 Kenji Kuranuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:46
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: 21
Claim 1
Independent Claim
124 words
A solid electrolytic capacitor comprising; an electrolyte comprising a conductive polymer (i) having a repeating unit of at least one compound selected from a heterocyclic compound and (ii) containing as a dopant at least one anion selected from a naphthalenesulfonate, an alkyl naphthalenesulfonate at least one of hydrogen atoms on the naphthalene ring of which has been substituted with an alkyl group having 1 to 12 carbon atoms, an anthraquinonesulfonate, and an alkyl anthraquinonesulfonate at least one of hydrogen atoms on the anthraquinone ring of which has been substituted with an alkyl group having 1 to 12 carbon atoms; said electrolyte being provided on a valve metal on the surface of which a dielectric film is formed by anodic oxidation or anodic chemical conversion.
Claim 2
Dependent Claim
124 words
A solid electrolytic capacitor comprising; an electrolyte comprising a conductive polymer (i) having a repeating unit of at least one compound selected from a heterocyclic compound and (ii) containing as a dopant at least one anion selected from a naphthalenesulfonate, an alkyl naphthalenesulfonate at least one of hydrogen atoms on the naphthalene ring of which has been substituted with an alkyl group having 1 to 12 carbon atoms, an anthraquinonesulfonate, and an alkyl anthraquinonesulfonate at least one of hydrogen atoms on the anthraquinone ring of which has been substituted with an alkyl group having 1 to 12 carbon atoms; said electrolyte being provided on a valve metal on the surface of which a dielectric film is formed by anodic oxidation or anodic chemical conversion.
Claim 3
Dependent Claim
25 words
A solid electrolytic capacitor according to claim 1, wherein said heterocyclic compound is selected from the group consisting of pyrrole, thiophene, furan, and derivatives thereof.
Claim 4
Dependent Claim
16 words
A solid electrolytic capacitor according to claim 2, wherein said heterocyclic compound is pyrrole or thiophene.
Claim 5
Dependent Claim
25 words
A solid electrolytic capacitor according to claim 1, wherein said naphthalenesulfonate is selected from the group consisting of sodium naphthalenesulfonate, ammonium naphthalenesulfonate, and potassium naphthalenesulfonate.
Claim 6
Dependent Claim
14 words
A solid electrolytic capacitor according to claim 4, wherein said naphthalenesulfonate is sodium naphthalenesulfonate.
Claim 7
Dependent Claim
28 words
A solid electrolytic capacitor according to claim 1, wherein said alkyl naphthalenesulfonate is selected from the group consisting of an isopropylnaphthalenesulfonate, a triisopropylnaphthalenesulfonate, a n-dibutylnaphthalenesulfonate, and a n-dodecylnaphthalenesulfonate.
Claim 8
Dependent Claim
22 words
A solid electrolytic capacitor according to claim 6, wherein said alkyl naphthalenesulfonate is sodium isopropylnaphthalenesulfonate, sodium triisopropylnaphthalenesulfonate, sodium n-dibutylnaphthalenesulfonate, or sodium n-dodecylnaphthalenesulfonate.
Claim 9
Dependent Claim
25 words
A solid electrolytic capacitor according to claim 1, wherein said anthraquinonesulfonate is selected from the group consisting of sodium anthraquinonesulfonate, ammonium anthraquinonesulfonate, and potassium anthraquinonesulfonate.
Claim 10
Dependent Claim
21 words
A solid electrolytic capacitor according to claim 8, wherein said anthraquinonesulfonate is sodium anthraquinone-2,6-disulfonate, ammonium anthraquinone-2,6-disulfonate, potassium anthraquinone-2,6-disulfonate, or sodium anthraquinone-2-sulfonate.
Claim 11
Dependent Claim
23 words
A solid electrolytic capacitor according to claim 1, wherein said alkyl anthraquinonesulfonate is selected from the group consisting of a methylanthraquinonesulfonate, and dodecylanthraquinonesulfonate.
Claim 12
Dependent Claim
18 words
A solid electrolytic capacitor according to claim 10, wherein said alkyl anthraquinonesulfonate is sodium 2-methylanthraquinone-7-sulfonate, or sodium 2-dodecylanthraquinone-7-sulfonate.
Claim 13
Dependent Claim
17 words
A solid electrolytic capacitor according to claim 1, wherein said valve metal comprises aluminum, tantalum or titanium.
Claim 14
Independent Claim
126 words
A method of manufacturing a solid electrolytic capacitor, comprising; forming a dielectric film on a valve metal; adhering manganese dioxide on said dielectric film; and thereafter further forming thereon an electrolyte comprising a conductive polymer (i) having a repeating unit of at least one compound selected from a heterocyclic compound and (ii) containing as a dopant at least one anion selected from a naphthalenesulfonate, an alkyl naphthalenesulfonate at least one of hydrogen atoms on the naphthalene ring of which has been substituted with an alkyl group having 1 to 12 carbon atoms, an anthraquinonesulfonate, and an alkyl anthraquinonesulfonate at least one of hydrogen atoms on the anthraquinone ring of which has been substituted with an alkyl group having 1 to 12 carbon atoms, by electrolytic polymerization.
Claim 15
Independent Claim
126 words
A method of manufacturing a solid electrolytic capacitor, comprising; forming a dielectric film on a valve metal; adhering manganese dioxide on said dielectric film; and thereafter further forming thereon an electrolyte comprising a conductive polymer (i) having a repeating unit of at least one compound selected from a heterocyclic compound and (ii) containing as a dopant at least one anion selected from a naphthalenesulfonate, an alkyl naphthalenesulfonate at least one of hydrogen atoms on the naphthalene ring of which has been substituted with an alkyl group having 1 to 12 carbon atoms, an anthraquinonesulfonate, and an alkyl anthraquinonesulfonate at least one of hydrogen atoms on the anthraquinone ring of which has been substituted with an alkyl group having 1 to 12 carbon atoms, by electrolytic polymerization.
Claim 16
Dependent Claim
29 words
A method of manufacturing a solid electrolytic capacitor according to claim 13, wherein said heterocyclic compound is selected from the group consisting of pyrrole, thiophene, furan, and derivatives thereof.
Claim 17
Dependent Claim
20 words
A method of manufacturing a solid electrolytic capacitor according to claim 14, wherein said heterocyclic compound is pyrrole or thiophene.
Claim 18
Dependent Claim
21 words
A method of manufacturing a solid electrolytic capacitor according to claim 13, wherein said valve metal comprises aluminum, tantalum or titanium.
Claim 19
Independent Claim
84 words
A method of manufacturing a solid electrolytic capacitor, comprising the steps of: forming on a valve metal an anodized film and thereafter adhering thereon manganese dioxide; and forming a film of a conductive electrolytically polymerized polymer, using a polymerization solution comprising a solvent, a monomer, an electrolyte and a polymer having a carboxylic acid group or a hydroxyl group wherein said polymer contained in said polymerization solution is selected from the group consisting of polyhydroxystyrene, novolac resin, polymethacrylic acid, polyacrylic acid, and copolymers thereof.
Claim 20
Independent Claim
84 words
A method of manufacturing a solid electrolytic capacitor, comprising the steps of: forming on a valve metal an anodized film and thereafter adhering thereon manganese dioxide; and forming a film of a conductive electrolytically polymerized polymer, using a polymerization solution comprising a solvent, a monomer, an electrolyte and a polymer having a carboxylic acid group or a hydroxyl group wherein said polymer contained in said polymerization solution is selected from the group consisting of polyhydroxystyrene, novolac resin, polymethacrylic acid, polyacrylic acid, and copolymers thereof.
Claim 21
Dependent Claim
40 words
A method of manufacturing a solid electrolytic capacitor according to claim 17, wherein said conductive electrolytically polymerized polymer is a polymer obtained by anodic oxidation polymerization of a monomer selected from the group consisting of pyrrole, thiophene, and derivatives thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-24 | 1994-03-26 | 1994-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-24 | 1998-03-26 | 1998-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-24 | 2002-03-26 | 2002-09-25 | $7700.00 | Window Closed / Lapsed |