WO2003107367A1 - 固体電解コンデンサおよび固体電解コンデンサ内蔵基板ならびにそれらの製造方法 - Google Patents
固体電解コンデンサおよび固体電解コンデンサ内蔵基板ならびにそれらの製造方法 Download PDFInfo
- Publication number
- WO2003107367A1 WO2003107367A1 PCT/JP2003/007733 JP0307733W WO03107367A1 WO 2003107367 A1 WO2003107367 A1 WO 2003107367A1 JP 0307733 W JP0307733 W JP 0307733W WO 03107367 A1 WO03107367 A1 WO 03107367A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrolytic capacitor
- solid electrolytic
- substrate
- valve metal
- aluminum foil
- Prior art date
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- 239000007787 solid Substances 0.000 title claims abstract description 335
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- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- GZXNBZCADRSACN-UHFFFAOYSA-N N1C=CC=C1.CC=C Chemical compound N1C=CC=C1.CC=C GZXNBZCADRSACN-UHFFFAOYSA-N 0.000 description 1
- 229910002089 NOx Inorganic materials 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- LFQREKVEOMIWQF-JTLUYSSBSA-N Pimentol Chemical compound COC1=CC(CC=C)=CC(O[C@H]2[C@@H]([C@@H](O)[C@H](O)[C@@H](COC(=O)C=3C=C(O)C(O)=C(O)C=3)O2)O)=C1O LFQREKVEOMIWQF-JTLUYSSBSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 239000000908 ammonium hydroxide Substances 0.000 description 1
- 229940107816 ammonium iodide Drugs 0.000 description 1
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium peroxydisulfate Substances [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 1
- VAZSKTXWXKYQJF-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)OOS([O-])=O VAZSKTXWXKYQJF-UHFFFAOYSA-N 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 150000001448 anilines Chemical class 0.000 description 1
- VBVBHWZYQGJZLR-UHFFFAOYSA-I antimony pentafluoride Chemical compound F[Sb](F)(F)(F)F VBVBHWZYQGJZLR-UHFFFAOYSA-I 0.000 description 1
- HKVFISRIUUGTIB-UHFFFAOYSA-O azanium;cerium;nitrate Chemical compound [NH4+].[Ce].[O-][N+]([O-])=O HKVFISRIUUGTIB-UHFFFAOYSA-O 0.000 description 1
- 230000036621 balding Effects 0.000 description 1
- 150000007514 bases Chemical class 0.000 description 1
- 235000010233 benzoic acid Nutrition 0.000 description 1
- 229960004365 benzoic acid Drugs 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
- UDHMTPILEWBIQI-UHFFFAOYSA-N butyl naphthalene-1-sulfonate;sodium Chemical compound [Na].C1=CC=C2C(S(=O)(=O)OCCCC)=CC=CC2=C1 UDHMTPILEWBIQI-UHFFFAOYSA-N 0.000 description 1
- QGJOPFRUJISHPQ-NJFSPNSNSA-N carbon disulfide-14c Chemical compound S=[14C]=S QGJOPFRUJISHPQ-NJFSPNSNSA-N 0.000 description 1
- 150000003857 carboxamides Chemical class 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 229960003280 cupric chloride Drugs 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 229940060296 dodecylbenzenesulfonic acid Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- LFQREKVEOMIWQF-UHFFFAOYSA-N ericifolin Natural products COC1=CC(CC=C)=CC(OC2C(C(O)C(O)C(COC(=O)C=3C=C(O)C(O)=C(O)C=3)O2)O)=C1O LFQREKVEOMIWQF-UHFFFAOYSA-N 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- YAGKRVSRTSUGEY-UHFFFAOYSA-N ferricyanide Chemical compound [Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] YAGKRVSRTSUGEY-UHFFFAOYSA-N 0.000 description 1
- UQSQSQZYBQSBJZ-UHFFFAOYSA-N fluorosulfonic acid Chemical compound OS(F)(=O)=O UQSQSQZYBQSBJZ-UHFFFAOYSA-N 0.000 description 1
- ZZUFCTLCJUWOSV-UHFFFAOYSA-N furosemide Chemical compound C1=C(Cl)C(S(=O)(=O)N)=CC(C(O)=O)=C1NCC1=CC=CO1 ZZUFCTLCJUWOSV-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 229910000043 hydrogen iodide Inorganic materials 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- PNDPGZBMCMUPRI-UHFFFAOYSA-N iodine Chemical compound II PNDPGZBMCMUPRI-UHFFFAOYSA-N 0.000 description 1
- CBEQRNSPHCCXSH-UHFFFAOYSA-N iodine monobromide Chemical compound IBr CBEQRNSPHCCXSH-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- KAEAMHPPLLJBKF-UHFFFAOYSA-N iron(3+) sulfide Chemical compound [S-2].[S-2].[S-2].[Fe+3].[Fe+3] KAEAMHPPLLJBKF-UHFFFAOYSA-N 0.000 description 1
- 239000004310 lactic acid Substances 0.000 description 1
- 235000014655 lactic acid Nutrition 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 229940098895 maleic acid Drugs 0.000 description 1
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical group [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- PDKHNCYLMVRIFV-UHFFFAOYSA-H molybdenum;hexachloride Chemical compound [Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[Cl-].[Mo] PDKHNCYLMVRIFV-UHFFFAOYSA-H 0.000 description 1
- YBGCOCZUFYIMAF-UHFFFAOYSA-N naphthalen-1-yl naphthalene-1-sulfonate;sodium Chemical compound [Na].C1=CC=C2C(S(=O)(OC=3C4=CC=CC=C4C=CC=3)=O)=CC=CC2=C1 YBGCOCZUFYIMAF-UHFFFAOYSA-N 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- LYGJENNIWJXYER-UHFFFAOYSA-N nitromethane Chemical compound C[N+]([O-])=O LYGJENNIWJXYER-UHFFFAOYSA-N 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 150000002927 oxygen compounds Chemical class 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- FIYYJQQFRVGGAM-UHFFFAOYSA-N phosphoric acid;pyridine-3-carboxylic acid Chemical compound OP(O)(O)=O.OC(=O)C1=CC=CN=C1 FIYYJQQFRVGGAM-UHFFFAOYSA-N 0.000 description 1
- UHZYTMXLRWXGPK-UHFFFAOYSA-N phosphorus pentachloride Chemical compound ClP(Cl)(Cl)(Cl)Cl UHZYTMXLRWXGPK-UHFFFAOYSA-N 0.000 description 1
- 229920003217 poly(methylsilsesquioxane) Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 239000001103 potassium chloride Substances 0.000 description 1
- 235000011164 potassium chloride Nutrition 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- OTYBMLCTZGSZBG-UHFFFAOYSA-L potassium sulfate Chemical compound [K+].[K+].[O-]S([O-])(=O)=O OTYBMLCTZGSZBG-UHFFFAOYSA-L 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 229960003857 proglumide Drugs 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 239000003586 protic polar solvent Substances 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- ABTOQLMXBSRXSM-UHFFFAOYSA-N silicon tetrafluoride Chemical compound F[Si](F)(F)F ABTOQLMXBSRXSM-UHFFFAOYSA-N 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 1
- JQWHASGSAFIOCM-UHFFFAOYSA-M sodium periodate Substances [Na+].[O-]I(=O)(=O)=O JQWHASGSAFIOCM-UHFFFAOYSA-M 0.000 description 1
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 1
- AWMAOFAHBPCBHJ-UHFFFAOYSA-M sodium;(7,7-dimethyl-3-oxo-4-bicyclo[2.2.1]heptanyl)methanesulfonate Chemical compound [Na+].C1CC2(CS([O-])(=O)=O)C(=O)CC1C2(C)C AWMAOFAHBPCBHJ-UHFFFAOYSA-M 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- OBTWBSRJZRCYQV-UHFFFAOYSA-N sulfuryl difluoride Chemical group FS(F)(=O)=O OBTWBSRJZRCYQV-UHFFFAOYSA-N 0.000 description 1
- CBXCPBUEXACCNR-UHFFFAOYSA-N tetraethylammonium Chemical compound CC[N+](CC)(CC)CC CBXCPBUEXACCNR-UHFFFAOYSA-N 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- DDFYFBUWEBINLX-UHFFFAOYSA-M tetramethylammonium bromide Chemical compound [Br-].C[N+](C)(C)C DDFYFBUWEBINLX-UHFFFAOYSA-M 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- YXFVVABEGXRONW-UHFFFAOYSA-N toluene Substances CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 1
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
- 238000001721 transfer moulding Methods 0.000 description 1
- FEONEKOZSGPOFN-UHFFFAOYSA-K tribromoiron Chemical compound Br[Fe](Br)Br FEONEKOZSGPOFN-UHFFFAOYSA-K 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/008—Terminals
- H01G9/012—Terminals specially adapted for solid capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/22—Electrodes
- H01G11/30—Electrodes characterised by their material
- H01G11/48—Conductive polymers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
- H01G2/02—Mountings
- H01G2/06—Mountings specially adapted for mounting on a printed-circuit support
- H01G2/065—Mountings specially adapted for mounting on a printed-circuit support for surface mounting, e.g. chip capacitors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/004—Details
- H01G9/14—Structural combinations or circuits for modifying, or compensating for, electric characteristics of electrolytic capacitors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/13—Energy storage using capacitors
Definitions
- the present invention relates to a solid electrolytic capacitor, a substrate with a built-in solid electrolytic capacitor, and a method for producing the same. More specifically, the present invention relates to a valve metal foil substrate having a surface on which an insulating oxide film is formed, and a solid polymer electrolyte layer. The present invention relates to a solid electrolytic capacitor in which a conductive layer is sequentially formed, the solid electrolytic capacitor being suitable for being mounted or incorporated in a circuit board, a substrate with a built-in solid electrolytic capacitor, and a method of manufacturing the same.
- Electrolytic capacitors use metals such as aluminum, titanium, brass, nickel, and tantalum, which have the ability to form an insulating oxide film, or so-called valve metals, as an anode, and anodize the surface of the valve metal to form an insulating oxide film.
- metals such as aluminum, titanium, brass, nickel, and tantalum, which have the ability to form an insulating oxide film, or so-called valve metals, as an anode, and anodize the surface of the valve metal to form an insulating oxide film.
- an electrolyte layer substantially functioning as a cathode is formed, and further, a conductive layer such as graphite or silver is provided as a cathode.
- aluminum electrolytic capacitors use a porous aluminum foil, whose specific surface area is increased by etching, as the anode, and an electrolytic capacitor between the aluminum oxide-palladium layer formed on the anode surface and the cathode foil. It is configured with a separator paper impregnated with the liquid.
- an electrolytic capacitor that uses an electrolyte in the electrolyte layer between the insulating oxide film and the cathode has a problem that its life is determined by leakage from the sealing part and evaporation of the electrolyte.
- the sensor does not have such a problem and is preferred.
- a typical solid electrolyte composed of a metal oxide used for a solid electrolytic capacitor is manganese dioxide.
- a solid electrolyte composed of an organic compound used for a solid electrolytic capacitor is disclosed in, for example, And 7,7,8,8-tetracyanooxydimethane (TCNQ) complex salts disclosed in Japanese Patent Application Laid-Open No. 7-92555 and Japanese Patent Application Laid-Open No. 58-191414.
- Solid electrolytic capacitors had the following problems.
- the solid electrolyte layer composed of manganese dioxide is generally formed by repeating the thermal decomposition of manganese nitrate, but the oxidation of NOx gas generated by the heat applied during the thermal decomposition or by the thermal decomposition
- the dielectric oxide insulating film which is a dielectric, is damaged or deteriorated by the operation.
- the solid electrolyte layer is formed of manganese dioxide, the leakage current value becomes large and the solid electrolyte layer obtained finally becomes There has been a problem that various characteristics of the capacitor tend to be low.
- manganese dioxide is used as a solid electrolyte, there is a problem that the impedance of the solid electrolytic capacitor is increased in a high frequency range.
- the conductivity of the TCNQ complex salt is less than about 1 SZ cm, so that it has a problem that it cannot sufficiently meet the current demand for lower impedance of electrolytic capacitors.
- TCNQ complex salts are used as solid electrolytes because of their low adhesion to insulating oxide films and low thermal stability when fixing solder and thermal stability over time. It has been pointed out that the solid electrolytic capacitors that have not been able to achieve sufficient reliability.
- the TCNQ complex salt is expensive, and the solid electrolytic capacitor using the TCNQ complex salt as a solid electrolyte has a problem that the cost is high.
- Japanese Patent No. 27255553 discloses a solid electrolytic capacitor in which polyaniline is formed by chemical oxidative polymerization on an insulating oxide film on the surface of an anode.
- Japanese Patent Publication No. 8-310400 discloses that it is difficult to form a high-strength conductive polymer film on an insulating oxide film on the anode surface only by the chemical oxidation polymerization method.
- the insulating oxide film on the anode surface is an electric conductor, it is impossible or extremely difficult to form an electrolytic polymerized film directly on the insulating oxide film on the anode surface by electrolytic polymerization.
- a metal or manganese dioxide thin film is formed on an insulating oxide film, and a conductive polymer such as polypyrrol, polythiophene, polyaniline, or polyfuran is formed on the metal or manganese dioxide thin film.
- a solid electrolytic capacitor whose membrane is formed by electrolytic polymerization is proposed.
- Japanese Patent Publication No. Hei 4-74853 discloses a solid electrolytic capacitor in which a conductive polymer film such as polypyrrole, polythiophene, polyaurine, or polyfuran is formed on an insulating oxide film by chemical oxidation polymerization. It has been disclosed.
- the demand for smaller and thinner electronic devices demands that electronic components be further reduced in size and higher performance, and that circuit boards have higher functionality by making them thinner and more multilayered.
- the thickness of IC cards is 1 mm or less
- the thickness of portable personal computers is extremely thin, 20 mm or less.
- Electronic components mounted on these and wiring boards on which electronic components are mounted Is required to be formed with a thickness of several mm to several hundred microns.
- Japanese Patent Application Laid-Open No. 2-545010 / Patent No. 29505707 discloses that a solid electrolytic capacitor is integrated with a substrate in advance in the same manner as the resistance function of a wiring substrate and a conductive pattern. It is proposed to increase the density of electronic components and reduce the thickness of the circuit board by using a circuit board formed on a single substrate with multiple solid electrolytic capacitors formed on a single substrate.
- Japanese Patent Application Laid-Open No. 2-54510 discloses a method in which a pattern of a foil-shaped valve metal base such as an aluminum foil having an electric conductor and an insulating oxide film forming ability is formed on an insulating substrate.
- An insulating oxide layer, a conductive polymer layer of a heterocyclic compound, and a conductor layer are sequentially formed at one or several locations on one side of the pattern of the metal substrate, and a substrate with a solid electrolytic capacitor is formed.
- a pattern of a valve metal substrate having an electric conductor and an insulating oxide film forming ability is formed on both surfaces of the insulating substrate, and one or more of the surface of the pattern of the valve metal substrate is formed.
- a substrate with a built-in solid electrolytic capacitor was fabricated. And layers, discloses a solid electrolytic capacitor built-in substrate having a multilayer structure.
- a solid electrolytic capacitor using a conductive polymer is formed integrally with a substrate in advance, similarly to a resistor layer and a conductive pattern of a circuit board. By doing so, it is not necessary to mount individual capacitors on the circuit board, and it is possible to increase the density of electronic components and to improve electrical characteristics such as noise reduction. ing.
- Patent No. 2,950,587 discloses that a dielectric layer, an electrolyte layer, and a conductor layer are sequentially formed on both sides of a plate-shaped anode body, that is, a plate-shaped valve 'metal base, A cathode terminal is provided through each conductor layer to form a capacitor element, and a desired wiring pattern is formed on both sides of the capacitor element thus formed.
- a solid electrolytic capacitor produced by joining printed boards provided with a resin layer via a resin layer. According to Patent No. 2,950,587, even a solid electrolyte that is mechanically fragile can be protected by the printed substrates disposed on both sides, so that a highly reliable solid electrolytic capacitor can be obtained. It is stated that, by forming a desired wiring pattern on a printed circuit board in advance, other electronic components can be easily mounted on the printed circuit board.
- Such an electric wiring board with a built-in solid electrolytic capacitor has an ability to form an insulating oxide film serving as an anode, as a lead electrode for connecting the solid electrolytic capacitor to another electronic component to be mounted on the board. It is indispensable to connect to the valve metal foil substrate. However, it is desirable to simply connect a metal conductor such as copper to the valve metal foil substrate to form a lead electrode. However, there is a problem that the capacitor characteristics cannot be obtained.
- the solid electrolytic capacitor roughens (increases the surface of) the valve metal foil base so that the surface area of the valve metal base is increased, and also uses a material such as aluminum oxide.
- a valve metal foil base of a desired size is cut out from a foil sheet of a valve metal such as aluminum having an insulating oxide film formed thereon, and a cathode and a cathode are formed on the roughened insulating oxide film of the valve metal foil.
- a solid polymer electrolyte layer, and a conductive layer such as a carbon paste layer and a silver paste layer on the solid polymer electrolyte layer serving as a cathode, and forming a lead electrode of the cathode.
- the insulating oxide film formed on the surface of the roughened valve metal foil substrate is removed, and a metal conductor such as copper is applied to the valve metal substrate. Electrical between metal It is necessary to connect by ultrasonic welding, cold, and balding (cold welding) so that they can be connected and joined together. Since the valve metal foil substrate on which the lead electrodes are formed is cut out from the valve metal sheet, the edge portion of the valve metal foil substrate does not have an insulating oxide film formed thereon. If an insulating oxide film is not formed on the edge, the metal part of the valve metal substrate comes into contact with the solid polymer electrolyte layer and does not function as a solid electrolytic capacitor. It is indispensable to form an insulating oxide film on the part.
- the anode body which is made by bonding a metal conductor such as copper to the valve metal foil substrate whose surface has been roughened by ultrasonic welding or cold welding (cold pressure welding), is connected to a conductive material such as a stainless beaker.
- a metal conductor such as copper to the positive electrode
- a conductive container to the negative electrode to perform anodization.
- the conductor comes into contact with the chemical conversion solution, current continues to flow, and as a result, metal conductors such as copper are corroded, and there is a problem that an insulating oxide film cannot be formed on the edge portion of the valve metal base.
- Valve metal foil substrate with roughened surface In the case of anodic oxidation by immersing only in a chemical conversion solution, since the surface of the valve metal foil substrate is roughened, the chemical conversion solution reaches a metal conductor such as copper by capillary action, Similarly, current continues to flow, and metal conductors such as copper are corroded, so that there is a problem that an insulating oxide film cannot be formed on the edge portion of the valve metal foil base.
- Such a problem is that, before joining a metal conductor such as copper to the valve metal foil base, an electrode is provided on an edge portion of the valve metal foil base where the insulating oxide film is not formed, and anodizing treatment is performed.
- This can be solved theoretically by forming an insulating oxide film on the edge portion of the base, but in general, the thickness of a foil sheet of a valve metal base such as aluminum is 100 ⁇ m. Therefore, it is extremely difficult to provide an electrode at the edge of the valve metal foil substrate where the insulating oxide film is not formed, and to perform anodizing treatment.
- a solid electrolytic capacitor suitable for the above cannot be obtained.
- an object of the present invention is a solid electrolytic capacitor in which at least a solid polymer electrolyte layer and a conductor layer are sequentially formed on a valve metal foil substrate having an insulating oxide film formed on its surface, It is an object of the present invention to provide a solid electrolytic capacitor suitable for mounting or incorporating on a circuit board while reducing ESL, a substrate on which the solid electrolytic capacitor is incorporated, and a method of manufacturing the same.
- the inventor of the present invention has made intensive studies to achieve the object of the present invention.
- the valve metal foil substrate having an insulating oxide film formed on its surface is provided with a valve at each of two opposing ends.
- the object of the present invention has been achieved by joining one end of a metal body so as to electrically connect between valve metals to form a three-terminal type solid electrolytic capacitor element electrode body. To be able to do so.
- one end of a valve metal body is electrically connected to each of two opposing ends of a metal foil substrate having an insulating oxide film formed on the surface, and the valve metal is electrically connected.
- the electrode body for a solid electrolytic capacitor element formed by bonding them together forms an insulating oxide film at the edge portion of the valve metal foil substrate where the insulating oxide film is not formed by anodic oxidation.
- the chemical conversion solution does not reach the valve metal body beyond the junction between one end of the valve metal foil substrate and one end of the valve metal body whose surface is not roughened.
- one end of the valve metal body is joined to each of the two opposite ends of the valve metal foil substrate having an insulating oxide film formed on the surface so that the valve metals are electrically connected to each other.
- each of the valve metal bodies For the first time, according to the present invention, by joining one end of the conductive metal base to the end so that the metal is electrically connected to each other to form an electrode body for a solid electrolytic capacitor element, It is possible to achieve the purpose.
- one end of a valve metal body is connected to each of two opposing ends of a valve metal foil base having an insulating oxide film formed on the surface so that the valve metals are electrically connected to each other.
- One end of a conductive metal base is joined to the other end of each of the valve metal bodies so that the metal is electrically connected to each other. Since the body is composed, even if an insulating oxide film is formed on the edge of the valve metal foil substrate where the insulating oxide film is not formed by anodic oxidation, the chemical solution remains at one end of the valve metal foil substrate. Over the junction between one end of the valve metal body and the conductive metal base without reaching the conductive metal base.
- the insulating oxide film can be formed on the edge of the valve metal foil base as desired.
- the solid electrolytic capacitor is built into the circuit board, Even if an insulating oxide film is formed over time on the surface of the foil-shaped valve metal substrate where the surface is not roughened, the other end of the foil-shaped valve metal substrate whose surface is not roughened And one end of the foil-shaped conductive metal is joined so as to be electrically connected, so that the conductive metal contacts other electronic components mounted on the circuit board.
- a solid electrolytic capacitor having a desired impedance characteristic can be built in the circuit board.
- ESL can be significantly reduced by the three-terminal electrode structure.
- a plurality of the solid electrolytic capacitor elements are individually arranged on a lead frame at least one by one, and the solid electrolytic capacitor elements are arranged by the lead frame.
- Conductor layers respectively provided on the element are electrically connected to each other, 03 07733
- a part of the cathode lead portion is drawn out from one surface of the region where the conductor frame portion of the solid electrolytic capacitor element intersects with the lead frame in a direction perpendicular to the surface. . ⁇
- a plurality of three-terminal solid electrolytic capacitor elements are arranged in an array, and can be configured as a discrete solid electrolytic capacitor, and a cathode lead electrode of each capacitor element is provided. Therefore, depending on how the circuit is assembled, each capacitor element can be used independently, or the capacity can be increased by connecting a plurality of capacitors in parallel. That is, the solid electrolytic capacitor according to the present embodiment can be used for multiple purposes.
- the object of the present invention is also to provide a metal foil base having an insulating oxide film formed on a surface thereof, and two opposing ends of the valve metal foil base, one end of which is provided between the valve metal. One end is connected to the other end of each of the valve metal body and the valve metal foil base so as to be electrically connected so that the metal is electrically connected to each other.
- At least a solid electrolytic capacitor element having a cathode electrode in which at least a solid polymer electrolyte layer and a conductor layer are sequentially formed on the conductive metal substrate and the valve metal foil substrate.
- the solid electrolytic capacitor element is attached to one surface of a first insulating substrate on which at least one wiring pattern is formed so as to be electrically connected to the wiring pattern, Facing the insulating substrate of A second insulating substrate on which at least one wiring pattern is formed is provided, and the solid electrolytic capacitor element is substantially closed formed by the first insulating substrate and the second insulating substrate. This is achieved by a substrate with a built-in solid electrolytic capacitor, which is housed in a space.
- At least one of the solid electrolytic capacitor elements is independently disposed on the first insulating substrate at least one by one, and the solid electrolytic capacitor element is provided by the wiring pattern.
- Con Conductor layers provided on each of the capacitor elements are electrically connected to each other, and one surface of a region where the wiring pattern intersects with the conductor layer portion of each of the solid electrolytic capacitor elements extends from one surface to the corresponding surface. In the vertical direction, a part of the wiring pattern is drawn out so as to penetrate the first insulating substrate.
- the object of the present invention is also to provide a valve metal foil substrate having an insulating oxide film formed on its surface, to each of two opposing ends of the valve metal body, electrically connecting one end of a valve metal body and the valve metal.
- the valve metal foil base body, the entire masked portion, and a part of the valve metal body not subjected to the masking process are immersed in the chemical conversion solution so as to be immersed in the chemical conversion solution.
- the electrode body Applying a voltage to perform an anodizing treatment to form an insulating oxide film on at least an edge portion of the valve metal foil base; and a solid polymer electrolyte on substantially the entire surface of the valve metal foil base.
- a solid electrolyte layer and a step of applying a conductive base on the solid polymer electrolyte layer and drying to form a conductive layer. Is achieved.
- the object of the present invention is also to provide a valve metal foil substrate having an insulating oxide film formed on its surface, to each of two opposing ends of the valve metal body, electrically connecting one end of a valve metal body and the valve metal.
- the present invention is attained by a method for manufacturing a substrate having a solid electrolytic capacitor, characterized by comprising a step of housing.
- the valve metal substrate is formed of a metal or an alloy selected from the group consisting of a metal having an insulating oxide film forming ability and an alloy thereof.
- Preferred valve metals include one metal or an alloy of two or more metals selected from the group consisting of aluminum, tantalum, titanium, niobium, and zirconium. Among these, aluminum and tantalum are preferred. Particularly preferred.
- the anode electrode is formed by processing these metals or alloys into a foil shape.
- the material of the conductive metal is not particularly limited as long as the material is a metal or an alloy having conductivity, but preferably, solder connection is possible, and particularly, copper, brass, nickel, It is preferable to select from one kind of metal selected from the group consisting of zinc and chromium, or alloys of two or more kinds of metals. Among these, from the viewpoints of electrical characteristics, workability in later processes, cost, etc. Therefore, copper is most preferably used.
- the solid polymer electrolyte layer contains a conductive polymer compound, and is preferably a valve having a surface roughened by chemical oxidation polymerization or electrolytic oxidation polymerization to form an insulating oxide film. Formed on a metal foil substrate.
- the surface of the solid polymer electrolyte layer is roughened as described below, and an insulating oxide film is formed. Formed on a valve metal foil substrate.
- a solution containing 0.001 to 2.0 mol Z liter of an oxidizing agent only on the valve metal foil base having a roughened surface and an insulating oxide film formed, or A solution to which a compound giving a dopant species is added is uniformly applied by a method such as coating or spraying.
- a solution containing at least 0.1 mol mol of the conductive polymer compound raw material monomer or the conductive polymer compound raw material monomer itself is coated on the surface of the valve metal foil substrate with the insulating material formed thereon. Direct contact with oxide film.
- the raw material monomers are polymerized, a conductive polymer compound is synthesized, and a solid polymer electrolyte layer made of the conductive polymer compound is formed on the insulating oxide film formed on the surface of the valve metal foil substrate. Is formed.
- the conductive polymer compound contained in the solid polymer electrolyte layer includes a substituted or unsubstituted ⁇ -conjugated heterocyclic compound, a conjugated aromatic compound, and a heteroatom-containing conjugated aromatic compound.
- a compound selected from the group consisting of a starting monomer is used as a starting monomer, and among these, a conductive polymer compound in which a substituted or unsubstituted ⁇ -conjugated heterocyclic compound is used as a starting monomer is preferable, Further, a conductive polymer compound selected from the group consisting of polyaniline, polypyrrole, polythiophene, polyfuran, and derivatives thereof, particularly, polyaniline, polypyrrole, and polyethylenedioxythiophene are preferably used.
- the conductivity preferably used for the solid polymer electrolyte layer Specific examples of the raw material monomer for the polymer compound include unsubstituted aniline, alkenyl aniline, alkoxy aniline, haloaline, o-phenylenediamine, 2,6-dialkyl aniline, 2,5- Dialkoxyanilines, 4,4, -diaminodiphenyl ether, pyrrole, 3-methylpyrrole, 3-ethylpyrrole, 3-propylpyrroline, thiophene, 3-methinolethiophene, 3-ethinolethiophene, 3,4-ethylenedioxythiophene and the like can be mentioned.
- the oxidizing agent used in the chemical oxidative polymerization is not particularly limited, and examples thereof include Fe 3+ salts such as ferric chloride, ferric sulfide, and ferricyanide; Ce4 + salts such as ammonium and ammonium cerium nitrate, halides such as iodine, bromine and bromine iodide, silicon pentafluoride, antimony pentafluoride, silicon tetrafluoride, phosphorus pentachloride, phosphorus pentafluoride Metal halides, such as aluminum chloride, molybdenum chloride, etc., sulfuric acid, nitric acid, fluorosulfuric acid, trifluoromethanesulfuric acid, trifluoromethanesulfuric acid, etc., protic acids such as sulfuric acid, oxygen trioxide, oxygen compounds such as nitrogen dioxide, sodium persulfate, Persulfates such as potassium sulfate, ammonium per
- the compound providing dopant species to be added to the oxidizing agent for example, L i PF 6, L i A s F 6, N a PF 6, KPF 6, KA s F 6 , etc.
- Metal halides such as salt, ferric chloride, ferric bromide, cupric chloride, and collected cupric acid, hydrochloric acid, hydrogen bromide, hydrogen iodide, sulfuric acid, phosphoric acid, nitric acid, nitric acid, and alkali metals thereof Salts, alkaline earth metal salts or ammonium salts, perhalic acids such as perchloric acid and sodium perchlorate or hydrohalic acids such as salts thereof, inorganic acids or salts thereof, acetic acid, oxalic acid, formic acid, Mono or dicals such as butyric acid, succinic acid, lactic acid, cunic acid, phthalenoic acid, maleic acid, benzoic acid, salicylic acid, and nicotinic acid Phosphate, can be mentioned force Lebon acids such as aromatic heterocyclic carboxylic acid, c port Gen of the force carboxylic acid Contact Yopi these salts, such as Torifuruoro a
- these compounds capable of providing the oxidizing agent and the dopant species are used in the form of a suitable solution dissolved in water, an organic solvent or the like.
- the solvents may be used alone or as a mixture of two or more.
- the mixed solvent is also effective in increasing the solubility of the compound giving the dopant species.
- the mixed solvent those having compatibility between the solvents and those having compatibility with the compound capable of providing the oxidizing agent and the dopant species are preferable.
- Specific examples of the solvent include organic amides, sulfur-containing compounds, esters, and alcohols.
- the solid polymer electrolyte layer is formed on the valve metal foil substrate on which the surface is roughened and the insulating oxide film is formed by electrolytic oxidation polymerization, as is well known, a conductive underlayer is used.
- the solid polymer electrolyte layer is formed by immersing in the electrolyte containing the raw material monomer of the conductive polymer compound and the supporting electrolyte together with the counter electrode, and supplying an electric current.
- a thin layer is first introduced by chemical oxidation polymerization.
- An electrically conductive underlayer is formed.
- the thickness of the conductive underlayer is controlled by controlling the number of times of polymerization under certain polymerization conditions. The number of polymerizations is determined by the type of the raw material monomer.
- the conductive underlayer may be composed of any of a metal, a metal oxide having conductivity, and a conductive polymer compound, but is preferably composed of a conductive polymer compound.
- a raw material monomer for forming the conductive underlayer a raw material monomer used for chemical oxidative polymerization can be used, and the conductive polymer compound contained in the conductive underlayer is formed by chemical oxidative polymerization. This is the same as the conductive polymer compound contained in the solid polymer electrolyte layer formed by the above method.
- the conductive underlayer may be formed by converting the number of polymerizations so that the conductive polymer is formed under a condition of about 30% (weight ratio). Then, the conductive underlayer is used as a working electrode, and is immersed in an electrolytic solution containing a raw material monomer of a conductive polymer compound and a supporting electrolyte together with a counter electrode, and an electric current is supplied. A solid polymer electrolyte layer is formed.
- the conductive polymer compound that can be used for the solid polymer electrolyte layer is the same as the conductive polymer compound used for the conductive underlayer, and therefore, the conductive polymer compound used for chemical oxidation polymerization.
- conductive polymer compounds using a substituted or unsubstituted ⁇ -conjugated heterocyclic compound as a raw material monomer are preferable, and polyaniline, polypyrrole, polythiophene, polyfuran, and the like Selected from the group consisting of derivatives of Conductive polymer compounds, in particular, polyaniline, polypyrrole, and polyethylenedioxythiophene are preferably used.
- the supporting electrolyte is selected according to the monomer and the solvent to be combined.
- Specific examples of the supporting electrolyte include, for example, basic compounds such as sodium hydroxide, potassium hydroxide, ammonium hydroxide, and sodium carbonate. , Sodium bicarbonate, etc., and acidic compounds such as sulfuric acid, hydrochloric acid, nitric acid, hydrogen bromide, perchloric acid, trifluoroacetic acid, and sulfonic acid.
- the dissolution concentration of the supporting electrolyte may be set so as to obtain a desired current density, and is not particularly limited.
- a concentration of 0.05 is 1.0 mol / liter. Tor.
- the solvent used in the electrolytic oxidation polymerization is not particularly limited, and may be, for example, water, a protonic solvent, a nonprotonic solvent, or a mixed solvent obtained by mixing two or more of these solvents. Can be selected as appropriate.
- the mixed solvent those having compatibility between the solvents and those having compatibility with the monomer and the supporting electrolyte can be preferably used.
- protic solvent used in the present invention examples include formic acid, acetic acid, propionic acid, methanol, ethanol, n-propanol, and isoprono ⁇ .
- Knol, tert-butyl alcohol, methyl cellosonolev, Examples include getylamine and ethylenediamine.
- non-protonic solvent examples include methylene chloride, 1,2-dichloroethane, carbon disulfide, acetonitrile, acetone, propylene carbonate, nitromethane, nitrobenzene, ethyl acetate, diethyl ether ether, tetrahydrofuran, and dimethoxetane.
- Dioxane N, N-dimethylacetamide, N, N-dimethylformamide, pyridine, dimethylsulfoxide and the like.
- the solid polymer electrolyte layer is formed by electrolytic oxidation polymerization
- any of a constant voltage method, a constant current method, and a potential sweep method may be used.
- the conductive polymer compound can be polymerized by combining the constant voltage method and the constant current method.
- the current density is not particularly limited, but is at most about 50 O m AZ cm 2 .
- polymerization of a conductive polymer compound is performed while irradiating ultrasonic waves, as disclosed in JP-A-2000-100065. You can also. When polymerizing a conductive polymer compound while irradiating ultrasonic waves, it is possible to improve the film quality of the obtained solid polymer electrolyte layer.
- the maximum thickness of the solid polymer electrolyte layer is not particularly limited as long as it can completely fill irregularities on the surface of the anode electrode formed by etching or the like. 5 to 100 ⁇ m.
- the solid electrolytic capacitor further includes a conductor layer functioning as a cathode on the solid polymer electrolyte layer, and the conductor layer includes a graphite paste layer and a silver paste.
- the conductor layer includes a graphite paste layer and a silver paste.
- Layers can be provided, and the graphite paste layer and silver paste layer can be formed by a screen printing method, a spray coating method, or the like.
- the cathode of the solid electrolytic capacitor can be formed only by the silver paste layer, when the graphite paste layer is formed, the cathode of the solid electrolytic capacitor is formed only by the silver paste layer. Silver Migration can be prevented.
- a portion corresponding to a valve metal foil substrate on which a roughening treatment is performed using a metal mask or the like and an insulating oxide film is formed is removed.
- the graphite paste layer and the silver paste layer are formed only on the portion corresponding to the metal foil substrate on which the roughened portion is masked, subjected to a surface roughening treatment, and formed with an insulating oxide film.
- the solid electrolytic capacitor is fixed to the other surface side of one insulating substrate having at least one wiring pattern formed on one surface, or at least one wiring
- the pattern is fixed between the other surfaces of the pair of insulating substrates facing each other on which the pattern is formed.
- the material of the insulating substrate is not particularly limited, but it can be formed of a resin such as a phenol resin, a polyimide resin, an epoxy resin, or a polyester resin having good adhesiveness and solvent resistance.
- the insulating substrate may be formed of not only the organic material but also an inorganic material, and a metal oxide-based substrate such as an alumina substrate may be used as the insulating substrate of the present invention.
- FIG. 1 is a schematic perspective view of an electrode body for a solid electrolytic capacitor element (hereinafter, may be simply referred to as an electrode body) used in a solid electrolytic capacitor according to a preferred embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view of the solid electrolytic capacitor element electrode body shown in FIG. 1 taken along line AA.
- FIG. 3 is a schematic cross-sectional view showing an anodic oxidation method for forming an aluminum oxide film on an edge portion of an aluminum foil substrate 2 having a roughened surface.
- FIG. 4 is a schematic sectional view of a solid electrolytic capacitor element.
- FIG. 5 is a schematic sectional view of a substrate with a built-in solid electrolytic capacitor.
- FIG. 6 is a schematic perspective view showing a built-in substrate in which a plurality of solid electrolytic capacitor elements are built.
- FIG. 7 is a schematic top perspective view of a solid electrolytic capacitor element according to another preferred embodiment of the present invention.
- FIG. 8 is a schematic sectional view taken along the line BB in a state where the respective elements of FIG. 7 are joined.
- FIG. 9 is a schematic perspective view of an electrode body for a solid electrolytic capacitor element (hereinafter, may be simply referred to as an electrode body) used in a solid electrolytic capacitor according to another preferred embodiment of the present invention.
- FIG. 10 is a schematic cross-sectional view of the solid electrolytic capacitor element electrode body shown in FIG. 9 taken along the line AA.
- FIG. 11 is a schematic sectional view showing an anodic oxidation method for forming an aluminum oxide film on an edge portion of an aluminum foil substrate 2 having a roughened surface.
- FIG. 12 is a schematic sectional view of a solid electrolytic capacitor element.
- FIG. 13 is a schematic perspective view showing a configuration of a lead frame.
- FIG. 14 is a schematic perspective view of a plurality of solid electrolytic capacitor elements mounted on a lead frame.
- FIG. 15 is a schematic perspective view showing a molded solid electrolytic capacitor element.
- FIG. 16 is a schematic perspective view showing the solid electrolytic capacitor after molding and separated from the lead frame. The illustration of the internal solid electrolytic capacitor element is omitted.
- FIG. 1 shows a solid electrolytic capacitor according to a preferred embodiment of the present invention.
- FIG. 2 is a schematic perspective view of an electrode body for a solid electrolytic capacitor element (hereinafter, may be simply referred to as an electrode body) used in the present invention.
- FIG. FIG. 3 is a schematic cross-sectional view along the line A.
- aluminum is used as the valve metal having the ability to form an insulating oxide film, and as shown in FIGS. 1 and 2, the electrode of the solid electrolytic capacitor according to the present embodiment is used.
- the body 100 has an aluminum foil substrate 2 having a roughened surface (enlarged surface) and an aluminum oxide film 2X as an insulating oxide film formed on the surface, and a roughened surface.
- It has two aluminum foil bases 3a and 3b, which are not provided, and two foil-like copper bases 4a and 4 as metal conductors constituting the lead electrodes.
- One end of the aluminum foil base 2 having the roughened surface and the aluminum oxide film 2X formed on the surface is provided with one end of the aluminum foil base 3a whose surface is not roughened.
- the valve metal is joined by ultrasonic welding so that the valve metals are electrically connected to each other, and the other end of the aluminum foil substrate 3a whose surface is not roughened is a foil-like copper substrate 4.
- One end of a is joined by ultrasonic welding so that the metal is electrically connected.
- the other end of the aluminum foil substrate 2 having a roughened surface and an aluminum oxide film formed on the surface has one end of an aluminum foil substrate 3b having an unroughened surface.
- the valve metals are joined so as to be electrically connected to each other.
- the other end of the aluminum foil base 3b having an unroughened surface is provided with a foil-shaped copper base 4b. — The ends are joined by ultrasonic welding so that the metal is electrically connected.
- the electrode body 100 In forming the electrode body 100, first, two copper bases 4a and 4b, which are to constitute the lead electrodes, are cut out to predetermined dimensions from the copper foil sheet. Further, two aluminum bases 3a and 3b are cut out to predetermined dimensions from an aluminum foil sheet whose surface is not roughened. Then, a foil-shaped copper substrate 4 a and an aluminum foil substrate 3 whose surface is not roughened a are overlapped so that the ends of a predetermined area overlap each other. Further, the foil-shaped copper base 4b and the aluminum foil base 3b whose surface is not roughened are superimposed such that the ends having a predetermined area overlap each other.
- the areas of the ends of the foil-shaped copper bases 4a and 4b and the ends of the aluminum foil bases 3a and 3b overlapping each other are determined so that the joint has a predetermined strength.
- an aluminum foil substrate 2 of a predetermined size having a roughened surface and an aluminum oxide film formed on the surface is cut out of the aluminum foil sheet and joined to the foil-shaped copper substrates 4a and 4b, respectively.
- the aluminum foil substrates 3a and 3b, whose surfaces are not roughened, are overlapped so that the ends of a predetermined area overlap each other.
- the edge of the aluminum-film foil base 2 having a roughened surface and the ends of the aluminum foil bases 3 a and 3 b whose surfaces are not roughened are superposed by ultrasonic waves. By welding, they are joined to form weld joints 6a and 6b.
- the aluminum oxide film formed on the surface of the aluminum foil substrate 2 is removed, and the surface is roughened so that the aluminum metal is electrically connected.
- the ends of the aluminum foil bases 3a and 3b, which are not formed, are joined to the end of the aluminum foil base 2 whose surface is roughened.
- the area of the ends of the aluminum foil bases 3 a and 3 b and the end of the aluminum foil base 2 that overlap each other is determined by the following equation. It is determined to have a constant intensity.
- the electrode body 100 thus formed has a roughened surface, and the aluminum foil substrate 2 having the aluminum oxide film formed on the surface is cut out of the aluminum foil sheet.
- An aluminum oxide film is not formed on the edge, and to be used as the anode electrode of a solid electrolytic capacitor, the edge of the aluminum foil base 2 whose surface is roughened is oxidized by anodic oxidation. It is necessary to form an aluminum film.
- FIG. 3 is a schematic cross-sectional view showing an anodic oxidation method for forming an aluminum oxide film on an edge portion of an aluminum foil substrate 2 having a roughened surface.
- the aluminum foil substrate 2 As shown in FIG. 3, first, among the aluminum foil substrates 3a provided on one of the electrode bodies 100 and having an unroughened surface, the aluminum foil substrate 2 having a roughened surface. A part of the portion that does not overlap with and the entirety of the foil-shaped copper substrate 4a are masked by the thermosetting resist 8X. Next, the entire surface of the aluminum foil substrate 2 whose surface has been roughened and the masked surface have been roughened in a chemical conversion solution 8 comprising an aqueous solution of ammonium adipate housed in a stainless beaker 7. The electrode body 100 is set so that a part of the aluminum foil base 3a and the entire copper base 4a that are not covered are immersed, and the copper base 4b is positively placed. Then, a voltage is applied so that the stainless beaker 7 becomes negative.
- the working voltage can be determined appropriately according to the thickness of the aluminum oxide film to be formed.
- it is usually used. It is set to several volts or about 20 port.
- the chemical conversion solution 8 is reliably prevented from coming into contact with the foil-shaped copper bases 4 a and 4 b constituting the lead electrodes, and the entire surface of the aluminum foil base 2 whose surface including the edge is roughened An aluminum oxide film is formed only on a part of the aluminum foil bases 3a and 3b, the surfaces of which are not roughened.
- the electrode body 100 thus manufactured has a conductive surface formed on a substantially entire surface of the aluminum foil substrate 2 having a roughened surface and an aluminum oxide film formed thereon by a known method.
- a cathode electrode made of a conductive polymer or the like is formed, and a solid electrolytic capacitor element is manufactured.
- FIG. 4 is a schematic sectional view of a solid electrolytic capacitor element.
- the solid electrolytic capacitor element 110 has a solid polymer electrolyte on almost the entire surface of the aluminum foil substrate 2 on which the surface is roughened and the aluminum oxide film 9 is formed.
- a cathode electrode 14 comprising a layer 11, a graphite paste layer 12 and a silver paste layer 13 is provided.
- the solid polymer electrolyte layer 11 containing a conductive polymer compound has a roughened surface and is formed on substantially the entire surface of the aluminum foil substrate 2 on which the aluminum oxide film 9 is formed by chemical oxidation polymerization or electrolytic oxidation.
- the graphite paste layer 12 and the silver paste layer 13 are formed by polymerization, and are formed on the solid polymer electrolyte layer 11 by screen printing or spray coating.
- the solid electrolytic capacitor element 110 manufactured in this manner has the mask of the thermosetting resist 8X removed, is fixed between a pair of insulating substrates, is built into the substrate, and has a built-in solid electrolytic capacitor. It is a substrate.
- FIG. 5 is a schematic sectional view of a substrate with a built-in solid electrolytic capacitor.
- the solid electrolytic capacitor built-in substrate 12 ⁇ includes a first insulating substrate 21 and a second insulating substrate 22 opposed to each other, and the first insulating substrate 21 and the second insulating substrate 21.
- a solid electrolytic capacitor element 110 is provided between the substrate and the insulating substrate 22.
- a bank 23 whose height is larger than the thickness of the solid electrolytic capacitor element 110 is formed along two opposing sides, and The capacitor element 110 is positioned at a predetermined position on one surface of the first insulating substrate 21 between the banks 23, and is fixed by the conductive adhesive 29.
- the bank 23 is formed by punching a substrate made of the same material as the first insulating substrate 21 and the second insulating substrate 22 so that a portion of a predetermined area is left on a peripheral portion thereof. Process and make a frame-shaped substrate. It is formed by fixing the frame-shaped substrate to the first insulating substrate using an adhesive of the same material as the first insulating substrate 21 and the second insulating substrate 22.
- a wiring pattern 24 is formed on the other surface of the first insulating substrate 21, and the first insulating substrate 21 corresponds to an electrode position of a three-terminal solid electrolytic capacitor to be installed. As shown, a plurality of through holes 25 are formed.
- the solid electrolytic capacitor element 110 When the solid electrolytic capacitor element 110 is positioned at a predetermined position on the first insulating substrate 21 and fixed on the first insulating substrate 21 by the conductive adhesive 29, the first A second flat plate-shaped insulating substrate 22 is placed so as to contact the bank 23 formed on the insulating substrate 21 of FIG.
- first insulating substrate 21 and the second insulating substrate 22 are adhered to each other using an adhesive of the same material as that of the first insulating substrate 21 and the second insulating substrate 22.
- the built-in substrate 20 is manufactured.
- a wiring pattern 27 is formed on the upper surface of the second insulating substrate 22, and a plurality of through holes 28 are also formed on the second insulating substrate 22. Further, electronic components 30 are mounted on the lower surface of the first insulating substrate 21 and the upper surface of the second insulating substrate 22, and the contacts are electrically connected to the wiring patterns 24, 27. Connected.
- the first insulating substrate 21 is located at positions corresponding to the foil-shaped copper bases 4 a and 4 b, which are the anode lead electrodes of the solid electrolytic capacitor element 110, and at positions corresponding to the cathode electrodes 14.
- Each has through-holes 25a, 25b, and 25c, and copper, which is the anode lead electrode of the solid electrolytic capacitor element 110, is passed through the through holes 25a, 25b, and 25c.
- the bases 4a and 4b and the cathode electrode 14 are configured to be visually confirmed. ..
- the anode and the cathode of the solid electrolytic capacitor element 110 are connected to the wiring pattern 24 formed on the first insulating substrate 21 or the second insulating board. It is electrically connected to a wiring pattern 27 formed on the substrate 22.
- the surface of the aluminum foil substrate 2 having an anode lead electrode composed of the foil-shaped copper substrates 4a and 4b and having a roughened surface is covered with an aluminum oxide film. It is possible to obtain a three-terminal solid electrolytic capacitor element 110 having an excellent electrical property and having the electrode body 100 separated. In addition, because it is configured as a three-terminal solid electrolytic capacitor element, the ESL can be reduced by dividing the current path, and it has good electrical characteristics with almost no change in characteristics as well as initial characteristics. An electrolytic capacitor can be obtained.
- the solid electrolytic capacitor thus obtained can be made sufficiently thin, it is suitable for being incorporated in a circuit board, and as desired, fabricating a substrate 120 with a built-in solid electrolytic capacitor It becomes possible to do.
- the first insulating substrate 22 is provided with the bank 23, and in manufacturing the solid electrolytic capacitor built-in substrate 120, the solid electrolytic capacitor 10 is provided with the first insulating substrate 10.
- no excessive pressure is applied to the solid electrolytic capacitor, and therefore, the aluminum oxide film formed on the surface of the aluminum foil base 2 is broken and the aluminum acting as the anode is broken.
- FIG. 6 is a schematic perspective view showing a built-in substrate in which a plurality of solid electrolytic capacitor elements are built.
- the substrate 130 with a built-in solid electrolytic capacitor includes a first insulating substrate 21 and a second insulating substrate 22 opposed to each other.
- the four solid electrolytic capacitor elements 11 OA to 11 OD are built in between the insulating substrate 22 and the other.
- a bank 23 whose height is larger than the thickness of the solid electrolytic capacitor element 11 OA to 110 D is formed, and the solid electrolytic capacitor element 1 1 0 A to 110 D are positioned at predetermined positions on a wiring pattern formed on one surface of the first insulating substrate 21 between the banks 23, and are fixed by the conductive adhesive 29.
- wiring patterns (lands) 24A to 24D, 25A to 25D, and 26 for mounting a solid electrolytic capacitor are formed on one surface of the first insulating substrate 21, wiring patterns (lands) 24A to 24D, 25A to 25D, and 26 for mounting a solid electrolytic capacitor are formed. .
- the lands 24 A to 24 D corresponding to one anode lead electrode and the land 25 corresponding to the other anode lead electrode
- Lands 26 corresponding to A to 25D and a cathode electrode (conductor layer) are provided.
- the land 26 is formed as one wiring pattern connected to all the cathode electrodes of the four arranged solid electrolytic capacitor elements.
- a plurality of through holes 27 are formed at positions where the lands 24 to 26 are formed, thereby forming the first insulating substrate 21.
- the connection between the wiring pattern formed on the back surface and each land is ensured. Therefore, the electronic component mounted on the back surface of the first insulating substrate 21 can be electrically connected to the electronic component via the through hole 27 and the wiring pattern on the back surface of the substrate.
- each solid electrolytic capacitor 110 A to 110 D When the solid electrolytic capacitor elements 11 OA to 110 D are mounted, one conductive metal substrate 4 a of each solid electrolytic capacitor 110 A to 110 D will have a corresponding land 24 A to 24 D
- the other conductive metal substrates 4 b of the solid electrolytic capacitors 11 OA to 110 D are individually connected to the corresponding lands 25 A to 25 D, respectively.
- the cathode electrodes of the solid electrolytic capacitors 110 A to 110 D are all connected to a common land 26.
- the solid electrolytic capacitor element 11 OA to 11 OD is positioned at a predetermined position on the first insulating substrate 21, and each land and the lead electrode are electrically connected by soldering or conductive adhesive. While being fixed on the first insulating substrate 21, the plate-shaped second insulating substrate 22 is placed so as to come into contact with the bank 23 formed on the first insulating substrate 21. Then, the first insulating substrate 21 and the second insulating substrate 22 are integrated by an adhesive or the like.
- each anode lead electrode is provided independently, while the cathode electrode is short-circuited by a common land 26. ing. Therefore, the cathode electrodes of each solid electrolytic capacitor element are all electrically connected.
- each capacitor element can be used independently, and a large capacity and low ESR can be achieved by connecting multiple capacitors in parallel. That is, the substrate with a built-in solid electrolytic capacitor according to the present embodiment can be used for multiple purposes. It can be.
- FIG. 7 is a schematic top perspective view of a solid electrolytic capacitor element according to another preferred embodiment of the present invention.
- FIG. 8 is a schematic cross-sectional view taken along the line BB in a state where the elements of FIG. 7 are connected.
- the solid electrolytic capacitor element 140 is formed by stacking three elements 110 of one solid electrolytic capacitor shown in FIG. It is.
- the cathode electrode 14 is adhered by a conductive adhesive 29, and the anode lead electrodes 4a and 4b are joined by ultrasonic welding. Therefore, they are electrically connected. Therefore, although the thickness of the capacitor element is slightly increased, it is possible to provide a solid electrolytic capacitor element having three times the capacitance of the one-element solid electrolytic capacitor shown in Fig. 4. it can.
- FIG. 9 is a schematic perspective view of an electrode body for a solid electrolytic capacitor element (hereinafter, sometimes simply referred to as an electrode body) used in a solid electrolytic capacitor according to another preferred embodiment of the present invention.
- the figure is a schematic cross-sectional view of the solid electrolytic capacitor element electrode body shown in FIG. 9 taken along the line AA.
- the electrode body 150 of the solid electrolytic capacitor according to the present embodiment has a roughened surface (enlarged surface) and an aluminum oxide film 2X which is an insulating oxide film formed on the surface.
- An aluminum foil base 2 and two aluminum foil bases 3a and 3b whose surfaces are not roughened are provided.
- One end of the aluminum foil base 2 having the roughened surface and the aluminum oxide film 2X formed on the surface is provided with one end of the aluminum foil base 3a whose surface is not roughened.
- the valve metals are joined by ultrasonic welding so that they are electrically connected.
- one end of an aluminum foil substrate 3b whose surface is not roughened is provided at the other end of the aluminum foil substrate 2 having a roughened surface and an aluminum oxide film 2X formed on the surface.
- the valve metals are electrically connected by ultrasonic welding.
- the aluminum substrate 2 is cut into a predetermined size from an aluminum foil sheet cover having a roughened surface and an aluminum oxide film formed on the surface.
- two aluminum substrates 3a and 3b are cut out to predetermined dimensions from an aluminum foil sheet whose surface is not roughened.
- one end of the aluminum foil base 3a, 3b having an unroughened surface is attached to one end of the aluminum foil base 2 having a roughened surface and a roughened surface, respectively. They are overlapped so that the ends having a predetermined area overlap each other.
- the end of the aluminum foil base 2 having a roughened surface and the ends of the aluminum foil bases 3a and 3b whose surfaces are not roughened are superposed by ultrasonic welding.
- the welded portions 4a and 4b are formed.
- the aluminum oxide film 2X formed on the surface of the aluminum foil substrate 2 is removed, and the surface is roughened so that the aluminum metal is electrically connected.
- the ends of the non-planarized aluminum foil bases 3a and 3b are joined to the end of the aluminum foil base 2 whose surface is roughened.
- the overlapping aluminum foil substrates 3a, The area of the end of 3b and the end of the aluminum foil substrate 2 is determined so that the joint has a predetermined strength.
- the electrode body 150 thus produced was obtained by cutting an aluminum foil substrate 2 having a roughened surface and an aluminum oxide film 2X formed on the surface from an aluminum foil sheet. An aluminum oxide film constituting a dielectric is not formed on the edge portion.
- the edge portion of the aluminum foil substrate 2 having a roughened surface is It is necessary to form an aluminum oxide film by oxidation.
- FIG. 11 is a schematic sectional view showing an anodic oxidation method for forming an aluminum oxide film on an edge portion of an aluminum foil substrate 2 having a roughened surface.
- the electrode body 150 is made of an aluminum foil substrate 2a having a roughened surface out of the aluminum foil substrate 3a having a non-roughened surface. A portion of the portion that does not overlap with is masked by the thermosetting resist 8X.
- the entire surface of the aluminum foil substrate 2 having a roughened surface and the entire aluminum foil substrate 3 a having been subjected to a mask treatment are placed in a chemical conversion solution 8 comprising an aqueous solution of ammonium adipate stored in a stainless beaker 7.
- the electrode body 150 is set so that a part of the aluminum foil substrate 3b that has not been masked is immersed, and the aluminum foil substrate 3b whose surface is not roughened is set.
- a voltage is applied so that the stainless steel beaker 7 becomes negative and positive.
- the working voltage can be appropriately determined depending on the thickness of the aluminum oxide film to be formed. When forming an aluminum oxide film having a film thickness of 10 nm to 1 m, usually a few ports is used. Or about 20 volts.
- the chemical conversion solution 8 is reliably prevented from coming into contact with the tips of the aluminum foil bases 3a and 3b whose surfaces are not roughened, and the aluminum foil base whose surface including the edges is roughened.
- the aluminum oxide film is formed only on a part of the aluminum foil substrates 3a and 3b where the entire surface of the substrate 2 and the surface bonded thereto are not roughened.
- the electrode body 150 thus produced has a roughened surface, and is formed on a substantially entire surface of the aluminum foil substrate 2 on which the aluminum oxide film is formed by a known method using a conductive polymer or the like. Is formed, and a solid electrolytic capacitor element is manufactured.
- FIG. 12 is a schematic sectional view of a solid electrolytic capacitor element.
- the solid electrolytic capacitor element 160 has a roughened surface and an aluminum oxide film 9 formed on substantially the entire surface of the aluminum foil substrate 2.
- a cathode electrode 14 comprising a solid polymer electrolyte layer 11, a graphite paste layer 12, and a silver paste layer 13 is provided.
- the solid polymer electrolyte layer 11 containing a conductive polymer compound has a roughened surface and is formed on substantially the entire surface of the aluminum foil substrate 2 on which the aluminum oxide film 9 is formed by chemical oxidation polymerization or electrolytic oxidation.
- the graphite paste layer 12 and the silver paste layer (conductor layer) 13 are formed by polymerization, and are formed on the solid polymer electrolyte layer 11 by a screen printing method or a spray coating method.
- the plurality of solid electrolytic capacitor elements 160 manufactured in this manner are removed from the mask of the thermosetting resist 8X, mounted on a lead frame, and previously manufactured in the lead frame. Anode lead electrode and After being connected to the cathode lead electrode, it is molded to form a discrete solid electrolytic capacitor.
- FIG. 13 is a schematic perspective view showing a configuration of a lead frame.
- FIG. 14 is a schematic perspective view of a plurality of solid electrolytic capacitor elements mounted on a lead frame.
- the lead frame 15 is formed by stamping a phosphor bronze base into a predetermined shape to mount four solid electrolytic capacitor elements. .
- the lead frame 15 is provided with a center frame 18 X at the center of the main frame 15 X surrounding the four sides, and the center frame 18 X has a cathode lead portion 18 protruding downward.
- a to 18D are provided at predetermined intervals.
- the four solid electrolytic capacitor elements 10 A to 10 D are mounted at predetermined positions on the lead frame 15, respectively, and a paste layer (conductive layer) 14 A to form a cathode electrode of each element.
- the silver-based conductive adhesive is used to bond and fix the 14D so that it is electrically connected to the cathode leads 18A to 18D that have been prepared in the lead frame 15 beforehand.
- the ends of the aluminum foils 3a and 3b that have not been subjected to the surface roughening treatment are the same as the two anode lead parts 16A or 16D or 17A or Each of them is superposed on the end of 7D and welded by a laser spot welding machine, and joined to the anode lead portions 16 and 17.
- '' Fig. 15 is a schematic perspective view showing the molded solid electrolytic capacitor element.
- each solid electrolytic capacitor element is fixed on the lead frame, it is molded with epoxy resin 19 by means of a transformer or a transformer. A part of the cathode lead 18 is exposed from the bottom surface of the mold to serve as a cathode lead electrode.
- FIG. 16 is a schematic perspective view showing the solid electrolytic capacitor after molding and separated from the lead frame. The illustration of the internal solid electrolytic capacitor element is omitted.
- the solid electrolytic capacitor molded with epoxy resin 19 is separated from the lead frame, and the anode lead is bent to form anode lead electrodes 16 and 17. You. Further, the cathode lead portion is exposed from the bottom of the mold to form a cathode lead electrode 18.
- the solid electrolytic capacitor element 10 A to 1 ° D configured as described above has anode lead electrodes 16 A to 16 D and 17 A to 17 D, respectively, while the anode lead electrodes are independently provided.
- the cathode lead electrodes 18A to 18D are integrated by a common support portion 18X and short-circuited. Therefore, the cathode electrodes of each solid electrolytic capacitor element are all electrically connected.
- the surface is roughened, and the surface is roughened at each of two opposing ends of the aluminum foil substrate 2 covered with the aluminum oxide film.
- Aluminum foil bases 3a and 3b are joined at one end and copper bases 16 and 17 are joined at the other end to form an anode lead electrode.
- a solid electrolytic capacitor element 10 can be obtained.
- the ESL can be reduced by dividing the current path, and not only the initial characteristics but also good electrical characteristics with almost no change in characteristics With Electrolytic capacitor can be obtained.
- the discrete type solid electrolytic capacitor in which a plurality of three-terminal solid electrolytic capacitor elements are arranged in an array, has a common cathode lead electrode for each capacitor element.
- Each capacitor element can be used independently, and the capacity can be increased by connecting a plurality of capacitors in parallel. That is, the solid electrolytic capacitor according to the present embodiment can be used for multiple purposes.
- the apparent capacitor in the mold becomes a capacitor with multiple anode leads and a multi-terminal structure with electrodes, so the ESL or ESR can be reduced by dividing the current path. It is possible to greatly reduce it.
- a solid electrolytic capacitor having a solid polymer electrolyte layer was manufactured as follows.
- an aluminum foil is cut out from a 100 ⁇ m-thick aluminum foil sheet on which an aluminum oxide film has been formed and roughened, with dimensions of lcm X 1.5 cm. Join the copper foil and the unroughened aluminum foil so that the other end of the unroughened aluminum foil overlaps by 1 mm on each of the two ends When the parts are overlapped and their ends overlap, they are joined by an ultrasonic welding machine, and they are electrically connected together, copper foil, aluminum foil that has not been roughened, An electrode body for a three-terminal solid electrolytic capacitor element was prepared in which an aluminum foil subjected to a surface roughening treatment, an aluminum foil not subjected to a surface roughening treatment, and a copper foil were joined in this order.
- an aluminum oxide film was formed in an aqueous solution of ammonium adipate adjusted to a pH of 6.0 at a concentration of 7% by weight at a concentration of 7% by weight, and a roughening treatment was performed. It was set in an aqueous solution of ammonium adipate so that the aluminum foil to which the coating was applied was completely immersed. At this time, a part of the uncoated aluminum foil that had not been subjected to the surface roughening treatment was also immersed in the aqueous solution of ammonium adipate. The uncoated copper foil did not come into contact with the aqueous ammonium adipate solution.
- the copper foil side of the electrode body that has not been subjected to resist treatment is used as an anode, and immersed in an aqueous solution of ammonium adipate under a condition that the formation current density is 50 to 100 mA / cm and the formation voltage is 35 volts.
- the surface of the aluminum foil was oxidized to form an aluminum oxide film.
- the electrode body was pulled up from the aqueous solution of ammonium adipate, and a solid polymer electrolyte layer made of polypyrrole was formed by chemical oxidation polymerization on the surface of the roughened aluminum foil.
- through holes are formed at the positions of the epoxy resin insulating substrate containing glass vials corresponding to the two anode lead electrodes and cathode electrodes of the solid electrolytic capacitor element to be incorporated, respectively.
- a 3 ⁇ nickel plating was applied by electroless plating, and a 0.08 ⁇ gold plating was further applied.
- a substrate with a thickness of 200 ⁇ made of the same glass cloth-containing epoxy resin as the two substrates was processed into a size of 2 cm ⁇ 4.5 cm, and a 3 mm width around the processed substrate.
- the inner part was removed by punching, leaving a region, to prepare a bank forming substrate.
- two 50 ⁇ m-thick epoxy pre-predas made of the same glass cloth-containing epoxy resin as the two substrates were processed into a size of 2 cm x 4.5 cm, and a width of 3 mm was applied around the processed substrates. The inner portion was removed by punching, leaving a region of mm, to produce a substrate for bank formation.
- the bank-formed substrate from which the inner portion was removed by punching, and the surface from which one of the copper foils of the glass cloth-containing epoxy resin insulating substrate was removed were processed to a thickness of 50 as described above.
- the epoxy prepreg is held in close contact with one of the two epoxy prepregs, and maintained at 175 ° C. for 40 minutes under pressure and reduced pressure using a vacuum hot press. After curing, the glass cloth-containing epoxy resin insulating substrate and the substrate from which the inner portion was removed were fixed to obtain an insulating substrate having a concave space.
- the two anode lead electrodes and the cathode electrode of the three-terminal solid electrolytic capacitor element correspond to the through holes formed on the insulating substrate on the installation surface of the electrolytic capacitor on the insulating resin substrate with a turning space.
- Position The solid electrolytic capacitor was fixed using a silver-epoxy adhesive.
- the other epoxy resin insulative substrate was processed as described above on the other glass resin-containing epoxy resin insulative substrate to which the three-terminal solid electrolytic capacitor element was fixed.
- the solid electrolytic capacitors were overlapped and adhered to each other via the epoxy prepredder so as to be accommodated in the recessed space.
- the two insulated substrates thus adhered were held at 175 ° C. for 40 minutes under pressure and reduced pressure using a vacuum hot press device to cure the epoxy pre-prede.
- the two glass cloth-containing epoxy resin insulating substrates were fixed.
- the wiring pattern formed on the surface of the glass-cloth-containing epoxy resin insulating substrate passes through the through holes formed in each of the glass-cloth-containing epoxy resin insulating substrates.
- the printed circuit board with a built-in solid electrolytic capacitor is electrically connected to the through-hole to which the built-in solid electrolytic capacitor is fixed by using a conductive adhesive or solder, for example, through electronic components. Got one.
- the electrical characteristics of the printed circuit board # 1 with a built-in solid electrolytic capacitor thus manufactured were measured using the impedance analyzer 4294A manufactured by Agilent Technologies, Inc. and the network analyzer 8753D. measuring the S 2 i characteristic, based on the resulting S 2 i characteristic performs the equivalent circuit simulation was determined E SR, the ESL value. As a result, the capacitance at 120 Hz was 150 ⁇ F, the ESR at 100 kHz was 25 ⁇ , and the ESL was 15 ⁇ .
- printed circuit board sample # 1 with a built-in solid electrolytic capacitor was allowed to stand for 1000 hours at a high temperature of 125 ° C., and the electrical characteristics were evaluated in the same manner as described above.
- the capacitance at 120 ⁇ 1 is 14.5 ⁇ F and 100 k
- the ESR at H z was 27 ⁇ ⁇ and the ESL was 16 ⁇ ⁇ .
- the cathode electrode was integrated using a silver-based conductive adhesive, and the two anode lead electrodes were each integrated by welding with a NAG YAG laser spot welder.
- a solid electrolytic capacitor unit in which three three-terminal solid electrolytic capacitors were stacked was manufactured.
- two substrates of 500 ⁇ m thickness made of the same glass cloth-containing epoxy resin as the substrates were caloried to dimensions of 2 cm x 4.5 cm, respectively, around the processed substrate.
- the inner portion was removed by punching, leaving a region of 3 mm in width, to fabricate two bank forming substrates.
- three 50 m thick epoxy pre-predas made of the same glass cloth-containing epoxy resin as the substrate were each processed into dimensions of 2 cm x 4.5 cm, and a 3 mm width was placed around the processed substrate.
- the inner portion was removed by punching, leaving the area, to produce a first epoxy pre-preda, a second epoxy pre-preda and a third epoxy pre-preda.
- the other of the bank forming substrate having been punched out and having the inner portion removed, and the other surface of the glass cloth-containing epoxy resin insulating substrate from which the copper foil had been removed were processed as described above.
- the other epoxy pre-predeer 50 ⁇ m thick, is brought into intimate contact with the second epoxy pre-predeer, and the pressure is increased by applying a vacuum hot press at 175 ° C. for 40 minutes under reduced pressure. Then, the epoxy pre-preda was cured and the glass cloth-containing epoxy resin insulating substrate and the other substrate for bank formation were fixed to obtain a second insulating substrate having a recessed space.
- the two anode lead electrodes and the cathode electrode of the three-terminal solid electrolytic capacitor element cut were inserted into the through holes formed in the insulating substrate.
- the solid electrolytic capacitor element was fixed using silver-epoxy adhesive so as to be arranged at the corresponding position.
- a second insulating substrate was placed on the first insulating substrate to which the three-terminal solid electrolytic capacitor was fixed, and a 50 m-thick third epoxy pre-reader processed as described above.
- the solid electrolytic capacitors were overlapped and closely attached so that the concave spaces faced each other and the solid electrolytic capacitors were accommodated in the concave spaces.
- the two insulated substrates thus adhered were held at 175 ° C. for 40 minutes under pressure and reduced pressure using a vacuum hot press apparatus, and the epoxy pre-preda was cured.
- the two glass cloth-containing epoxy resin insulating substrates were fixed between them.
- the wiring pattern formed on the surface of the glass cloth-containing epoxy resin insulating substrate is passed through the through holes formed in each of the glass cloth-containing epoxy resin insulating substrates.
- the capacitance at 120 Hz was 450 F
- the ESR at 100 kHz was 1 1 ⁇
- the ESL was 12 ⁇ .
- PCB sample # 2 with a built-in solid electrolytic capacitor, 1 25. C was allowed to stand for 100 hours under high temperature conditions, and the electrical characteristics were evaluated in the same manner as above.
- the capacitance at 120 ° C. was 450 ⁇ F
- the ESR at 100 kHz was 1 ⁇
- the ESL was 12 pH.
- a 60 ⁇ m thick aluminum foil, which is not covered, is overlapped so that each end overlaps by 1 mm, and the part where each end overlaps is a part of the Planson Business Division of Emerson Japan, Ltd. was joined together and electrically connected by a 40 kHz Ultrasonic Welder to form a joined body of copper foil and aluminum foil that had not been subjected to surface roughening.
- an aluminum oxide film is formed, and the aluminum foil is cut out to a size of lcm x l.5 cm with a thickness of 100 m.
- the aluminum foil that has not been roughened is overlapped so that it overlaps the other end by 1 mm, and the part where each end overlaps is joined and electrically connected by an ultrasonic welding machine.
- a copper foil, an aluminum foil not subjected to a surface roughening treatment, and an aluminum oxide film were formed to form a bonded body of an aluminum foil subjected to the surface roughening treatment.
- the copper foil and the aluminum An electrode body for a two-terminal solid electrolytic capacitor was fabricated in which a aluminum foil and an aluminum oxide film were formed and the surface-treated aluminum foil was joined in this order. .
- the electrode body for a two-terminal solid electrolytic capacitor thus obtained was processed in substantially the same manner as in Example 1 to produce a printed board sample # 3 with a built-in two-terminal solid electrolytic capacitor.
- the capacitance at 120 Hz was 150 ⁇ F
- the ESR at 100 kHz was 45 m ⁇ .
- ESL was 150 000 pH.
- printed circuit board sample # 3 with a built-in solid electrolytic capacitor was allowed to stand for 1000 hours at a high temperature of 125 ° C., and the electrical characteristics were evaluated in the same manner as described above.
- the capacitance at 120 Hz was 140 F
- the ESR at 100 kHz was 55 m ⁇
- the ESL was 155 pH.
- an aluminum oxide film was formed, and an aluminum foil that had been subjected to a surface roughening treatment, an aluminum foil that had not been subjected to a surface roughening treatment, and a copper foil were joined.
- the printed circuit board samples # 1 and # 2 with a built-in solid electrolytic capacitor according to the present invention using the manufactured solid electrolytic capacitor were prepared by the method of bonding between foils, the material of the electric conductor and the solid polymer compound used.
- the capacitance characteristics, ESR characteristics, and ESL characteristics are all good.
- the printed circuit board sample # 3 with a built-in solid electrolytic capacitor according to Comparative Example 1 has the ESR characteristics and ESL characteristics. It was found that the characteristics were inferior, especially the ESL characteristics were remarkably inferior.
- a discrete three-terminal solid electrolytic capacitor was fabricated as follows.
- a roughening treatment is applied to form an aluminum oxide film.
- An aluminum foil sheet having a size of 0.7 cm 2 was cut from an aluminum foil sheet having a thickness of 100 / im. Further, an aluminum foil sheet of roughening is 0 have a thickness of 6, such have been subjected m, the so-roughening treatment is the same width as the aluminum foil that has been subjected, 0. Dimensions of ⁇ cm 2 Then, two pieces of aluminum foil were cut out.
- the unroughened aluminum foil is overlapped with the roughened aluminum foil so that one end of the aluminum foil is overlapped by 0.5 mm.
- the overlapped parts are joined and electrically connected by an ultrasonic welding machine, and a joined body of aluminum foil that has not been subjected to surface roughening treatment and aluminum foil that has been subjected to surface roughening treatment was prepared.
- Another aluminum foil which has not been subjected to surface roughening is laminated on the other end of the aluminum foil which has been subjected to surface roughening so that one end of the aluminum foil is overlapped by 0.5 mm.
- the parts where the ends overlap each other are joined and electrically connected by an ultrasonic welding machine, and the aluminum foil that has not been subjected to surface roughening and the surface roughening have been applied.
- a joined body of an aluminum foil and an aluminum foil not subjected to a surface roughening treatment was prepared.
- three-terminal solid electrolytic bonding is performed in the following order: aluminum foil that has not been subjected to surface roughening, aluminum foil that has been subjected to surface roughening, and aluminum foil that has not been subjected to surface roughening.
- An electrode body for a capacitor element was manufactured.
- the aluminum foil portion which has not been subjected to the surface roughening treatment is formed on both ends of the aluminum foil on which the surface roughening treatment has been performed and the aluminum oxide film has been formed.
- the aluminum foil portion which has not been subjected to the surface roughening treatment is formed on both ends of the aluminum foil on which the surface roughening treatment has been performed and the aluminum oxide film has been formed.
- only one end of aluminum foil was coated with a resist. No resist was applied to the other unfinished aluminum foil.
- the thus obtained electrode body was treated at a concentration of 3% by weight with a concentration of 6.0%.
- an aqueous solution of ammonium adipate adjusted to pH the entire surface of the uncoated aluminum foil coated with a resist and the surface roughening treatment are applied to form an aluminum oxide film.
- the entire aluminum foil and the part of the other aluminum foil that has not been subjected to the surface roughening treatment are soaked in the aqueous solution of ammonium adipate so that they are completely immersed as shown in Fig. 3. Set.
- the electrode body which was not subjected to the resist treatment and was not subjected to the surface roughening treatment, was used as the anode, the formation current density was 50 to 10 OmA / cm 2 , and the formation voltage was 12 Under a bolt condition, the surface of the aluminum foil immersed in the aqueous solution of ammonium adipate was oxidized to form an aluminum oxide film.
- the electrode body was pulled up from the aqueous solution of ammonium adipate, and a solid polymer electrolyte layer made of polypyrrole was formed by chemical oxidation polymerization on the surface of the roughened aluminum foil.
- the solid polymer electrolyte layer made of polypyrrole was made up of purified 0.1 mono / liter propylene monopyrrole monomer, 0.1 monoliter / liter annare quinole and sodium naphthyl naphthalenesulfonate.
- Electrode body so that only the aluminum foil on which the aluminum oxide film is formed is roughened in an ethanol-water mixed solution cell containing 5 mol / liter of iron (III) sulfate.
- a solid polymer electrolyte layer having a maximum thickness of about 50 ⁇ was formed.
- a carbon paste is applied to the surface of the solid polymer electrolyte layer thus obtained, and a silver paste is applied to the surface of the carbon paste to form a cathode electrode.
- the coated resist layer was dissolved in an organic solvent to remove the resist, exposing the aluminum foil portion that had not been subjected to the surface roughening treatment.
- a three-terminal solid electrolytic capacitor element was manufactured. Repeat the above operation to obtain a three-terminal solid electrolytic capacitor
- the four solid electrolytic capacitor elements thus manufactured were mounted in an array at predetermined positions on a lead frame processed into a predetermined shape shown in FIG.
- the cathode electrode portion of the solid electrolytic capacitor element to which the paste layer was applied was adhered to the lead frame using a silver-based conductive adhesive.
- the molded solid electrolytic capacitor element was separated from the lead frame, and the anode lead electrode was bent to obtain a discrete type solid electrolytic capacitor sample # 4. After that, by a known method, a constant voltage was applied to the solid electrolytic capacitor to perform aging treatment, and the leakage current was sufficiently reduced to complete the capacitor.
- the capacitance and S 2 characteristics were measured using an impedance analyzer 4 294 A and a network analyzer 875 3 D manufactured by Agilent Technologies, Inc. and, based on the resulting S 2 i characteristic performs the equivalent circuit simulation to determine ESR, the ESL value.
- a printed board with a built-in three-terminal solid electrolytic capacitor (hereinafter sometimes referred to as a three-terminal solid electrolytic capacitor or simply a solid electrolytic capacitor) was fabricated as follows.
- Aluminum foil with a thickness of 60 m is overlapped so that each end overlaps only 2.0 mm, and the overlapped portions of the foils are joined by an ultrasonic welding machine and Then, a joined body of a copper foil and an aluminum foil not subjected to the surface roughening treatment was produced. Two conjugates were produced.
- Another copper foil and a non-roughened aluminum foil joined body were attached to the other end of the roughened aluminum foil at the other end by 0.5 mm.
- the parts where one end overlaps each other so that they overlap each other, are joined and electrically connected by an ultrasonic welding machine, and copper foil, aluminum foil that has not been subjected to surface roughening treatment, A bonded body of an aluminum foil subjected to a surface roughening treatment, an aluminum foil not subjected to a surface roughening treatment, and a copper foil was formed.
- the copper foil and the surface roughening treatment which are formed on both ends of the aluminum foil on which the aluminum oxide film is formed are subjected to the surface roughening treatment.
- Aluminum foil contact Only one end of the coalesced portion was coated with a resist. No resist was applied to the other joint.
- the electrode body thus obtained was coated with a resist-coated copper foil and a rough surface at a concentration of 3% by weight in an aqueous solution of ammonium adipate adjusted to a pH of 6.0.
- the entire aluminum foil joined body that has not been subjected to the roughening treatment, the entire aluminum foil that has been subjected to the surface roughening treatment and has the aluminum oxide film formed thereon, and the roughened surface treatment has been performed. None
- the aluminum foil was set in an aqueous solution of ammonium adipate so that part of the other aluminum foil was completely immersed.
- the copper foil side of the electrode body which has not been subjected to the resist treatment, is used as the anode, and under the conditions of a formation current density of 50 to 10 OmA / cm 2 and a formation voltage of 12 volts, an aqueous solution of ammonium adipic acid is used.
- the surface of the aluminum foil immersed in it was oxidized to form an aluminum oxide film.
- the electrode body was pulled up from the aqueous solution of ammonium adipate, and a solid polymer electrolyte layer made of polypyrrole was formed by chemical oxidative polymerization on the surface of the roughened aluminum foil.
- the solid polymer electrolyte layer made of polypyrrole was purified.
- the surface of the solid polymer electrolyte layer thus obtained is coated with carbon.
- a paste is applied, and a silver paste is applied to the surface of the carbon paste to form a cathode electrode.
- the coated resist layer is coated with an organic solvent. After dissolving, the resist was removed to expose the aluminum foil not subjected to the surface roughening treatment and the copper foil portion.
- two glass cloth-containing epoxy resin insulative substrates with a thickness of 0.5 mm and a size of 144 mm ⁇ 46 mm, each of which is made of copper foil with a thickness of 18 m bonded on both sides, I prepared as follows.
- the copper foil surface On the copper foil surface, an unnecessary part of the copper foil was chemically etched to form an electric circuit, and a predetermined wiring pattern was formed.
- the copper foil on the board surface on the side where the three-terminal solid electrolytic capacitor element is to be fixed is puttered with a resist in order to perform the prescribed patterning, chemically etched, and turned into four solids. Unnecessary copper foil was removed so that the electrolytic capacitor elements were arranged at predetermined intervals and the respective cathode electrodes were electrically connected to each other.
- through holes are respectively placed at predetermined positions on the wiring pattern of the glass cloth-containing epoxy resin insulating substrate corresponding to the two anode lead electrodes and the cathode electrodes of the three-terminal solid electrolytic capacitor element to be incorporated. Then, a nickel plating of 3/1 m was applied by electroless plating on the through-holes and the etched copper foil pattern, and a gold plating of 0.08 m was further applied thereon.
- a 200 mm thick board made of the same glass cloth-containing epoxy resin as the two boards was processed to a size of 144 mm x 46 mm, and a 3 mm wide
- the inner portion was removed by punching, leaving the region, to prepare a bank forming substrate.
- two 50 mm thick epoxy pre-predas made of the same glass cloth-containing epoxy resin as the two substrates were processed into a size of 144 mm x 46 mm, and a width of 3 mm was applied around the processed substrates.
- the inner part was removed by punching, leaving the area of.
- the bank forming substrate from which the punching process has been performed and the inner portion thereof has been removed, and the surface of the glass cloth-containing epoxy resin insulating substrate on which the wiring pattern has been formed so that the solid electrolytic capacitor element is to be installed are added as described above.
- the 50 / Zm thick epoxy pre-preaders and pressurized and depressurized at 175 ° C for 40 minutes using a vacuum hot press By holding and curing the epoxy pre-preda, the glass cloth-containing epoxy resin insulating substrate and the substrate for bank formation from which the inner part was removed were fixed to obtain an insulating substrate having a concave space.
- the two anode and cathode electrodes of the three-terminal solid electrolytic capacitor correspond to the through-holes in the wiring pattern formed on the insulating substrate on the surface on which the wiring pattern is applied so that the solid electrolytic capacitor element is installed.
- Four three-terminal solid electrolytic capacitor elements were fixed in an array using silver-epoxy adhesive so as to be positioned.
- the other glass-cloth-containing epoxy resin insulating substrate is processed as described above.
- the solid electrolytic capacitor was overlapped and adhered via the other epoxy pre-preader having a thickness of 50 ⁇ m so as to be accommodated in the concave space.
- the two insulated substrates thus brought into contact with each other were maintained at 175 ° C for 40 minutes using a vacuum hot press under pressure and reduced pressure to remove the epoxy pre-prede. After curing, the space between the two glass cloth-containing epoxy resin insulating substrates was fixed.
- the through-holes formed in each of the glass cloth-containing epoxy resin insulating substrates And the wiring pattern formed on the surface of the glass cloth-containing epoxy resin insulating substrate are electrically connected with a conductive adhesive or solder to obtain a printed circuit board sample # 5 with a built-in solid electrolytic capacitor.
- a fixed voltage was applied to the solid electrolytic capacitor by a known method to perform aging treatment, and the leakage current was sufficiently reduced to complete the capacitor.
- a printed circuit board with a built-in two-terminal solid electrolytic capacitor (hereinafter sometimes referred to as a two-terminal solid electrolytic capacitor or simply a solid electrolytic capacitor) was fabricated as follows.
- the aluminum foil of 60 / X m thickness, which has not been subjected to the surface roughening treatment, is overlapped so that each end overlaps only 2.0 mm, and the part where each foil overlaps Were joined and electrically connected by an ultrasonic welder to produce a joined body of copper foil and aluminum foil that had not been subjected to surface roughening treatment.
- a size of 0.7 cm 2 is set so as to have the same width as the joined body.
- the aluminum foil is cut out and overlapped with the joined body of the prepared copper foil and the aluminum foil which has not been subjected to the surface roughening treatment so that the ends overlap each other by 0.5 mm.
- the electrode body for a two-terminal solid electrolytic capacitor element was prepared.
- a solid polymer electrolyte layer and a paste layer were formed in substantially the same manner as in Example 2 to form a two-terminal solid electrolytic capacitor.
- a capacitor element was fabricated and housed between two glass cloth-containing epoxy resin insulating substrates to obtain a printed circuit board sample # 6 with a built-in two-terminal solid electrolytic capacitor. After that, a fixed voltage was applied to the solid electrolytic capacitor by a known method to perform aging treatment, and the leakage current was sufficiently reduced to complete the capacitor.
- Table 1 shows the measurement results of the electrical characteristics of the solid electrolytic capacitors # 4 to # 6. No. 1 to No. 4 indicate each of the four solid electrolytic capacitor elements arranged in an array.
- the aluminum foil that has been subjected to the surface roughening treatment and has an aluminum oxide film, the aluminum foil that has not been subjected to the surface roughening treatment, and the copper foil are joined together.
- the solid electrolytic capacitor samples # 4 and # 5 of the present invention in which the three-terminal solid electrolytic capacitor elements thus arranged are arranged in an array and the cathode electrodes are electrically connected to each other, are discrete or built-in type. Regardless of the method of joining the foils, the material of the electric conductor, and the type of solid polymer compound used, the capacitance, ESR, and ESL characteristics are all good.
- the two-terminal solid electrolytic capacitor sample # 6 according to Comparative Example 1 it was found that the ESR characteristics and the ESL characteristics were inferior, and in particular, the ESL characteristics were remarkably inferior.
- samples of the three-terminal solid electrolytic capacitor, the printed circuit board with a three-terminal solid electrolytic capacitor, and the printed circuit board with a two-terminal solid electrolytic capacitor were taken at a constant temperature of 125 ° C for 100 The electric characteristics were measured in the same manner for a long time.
- Table 2 is a table showing the measurement results of the electrical characteristics of the solid electrolytic capacitors # 4 to # 6.
- valve metal bases 2 and 3 aluminum is used as the valve metal bases 2 and 3.
- aluminum alloy or tantalum, titanium, niobium, zirconium, or an alloy thereof is used.
- the valve metal bases 2 and 3 can be formed.
- foil-like copper is used as the metal conductor to constitute the lead electrode, but instead of copper, copper alloy, or brass, nickel, zinc, chromium, or an alloy thereof Thus, a metal conductor can be formed.
- the aluminum foil substrate 2 having a roughened surface and the aluminum substrates 3 a and 3 b having no roughened surface are joined by ultrasonic welding
- the aluminum bases 3a, 3b, which are not roughened, and the copper bases 4a, 4b in the form of foil are joined by ultrasonic welding, and both of these joints or One side may be joined by cold dwelling (cold welding) instead of ultrasonic welding to form a joint.
- the surface is roughened to increase the specific surface area of the aluminum foil base 2
- the aluminum foil base 2 is roughened. It is not always necessary to be.
- the present invention does not have to be a foil shape in the present invention.
- it may have a thicker frame or block shape.
- the copper substrate is not limited to a foil shape but may be a frame shape or a block shape.
- the solid electrolytic capacitor 10 is sandwiched between the first insulating substrate 21 and the second insulating substrate 22 to form the solid electrolytic capacitor storage printed circuit board 20.
- a solid electrolytic capacitor 10 can be fixed on one insulating substrate to produce a printed circuit board 20 with a built-in solid electrolytic capacitor.
- a plurality of electronic components 30 are mounted on both the surface of the first insulating substrate 21 and the surface of the second insulating substrate 22. It is not always necessary to mount a plurality of electronic components 30.
- the electronic component 30 is mounted on both the surface of the first insulating substrate 21 and the surface of the second insulating substrate 22.
- the electronic component 30 may be mounted on only one of the surface of the one insulating substrate 21 and the surface of the second insulating substrate 22.
- a plurality of wiring patterns 24 and 27 are formed on the surface of the first insulating substrate 21 and the surface of the second insulating substrate 22 respectively.
- a plurality of through holes 28 are formed in each of the first insulating substrate 21 and the second insulating substrate 22. It is not always necessary to form a plurality of through-holes in each of the insulating substrate 21 and the second insulating substrate 22, as long as at least one through-hole is formed in each. Les ,.
- the banks 23 are formed on the first insulating substrate 21.
- the banks 23 may be formed on the second insulating substrate 22. it can.
- a substrate made of the same material as the first insulating substrate 21 and the second insulating substrate 22 is formed so that a portion having a predetermined area is left around the periphery thereof.
- Punching to form a frame-shaped substrate, and fixing the frame-shaped substrate to the first insulating substrate using an adhesive of the same material as the first insulating substrate 21 and the second insulating substrate 22 By doing so, the bank 23 is formed, but the bank can be formed integrally with the first insulating substrate 21 by cutting the first insulating substrate 21, etc. Banks can be integrally formed on both the first insulating substrate 21 and the second insulating substrate 22 by cutting or the like.
- the height of the first insulating substrate 21 along the two sides facing each other is larger than the thickness of the solid electrolytic capacitor 10.
- the bank 23 is formed, it is not always necessary to form the bank 23, and the bank 23 can be replaced by a spacer, or simply by the resin 26, the first insulating substrate 21 is formed.
- the second insulating substrate 22 may be integrated with the solid electrolytic capacitor 10 so as to be separated from each other with the solid electrolytic capacitor 10 interposed therebetween.
- a solid electrolytic capacitor element 110 is sandwiched between a first insulating substrate 21 and a second insulating substrate 22 to form a printed circuit board 1 2 with a built-in solid electrolytic capacitor.
- a solid electrolytic capacitor mounted printed circuit board having the solid electrolytic capacitor element 110 fixed on one insulating substrate can also be manufactured.
- a foil-shaped valve metal substrate having a roughened surface and an insulating oxide film formed thereon, an insulating oxide film, a solid polymer electrolyte layer, and a conductor are provided on the foil-shaped valve metal substrate.
- a three-terminal solid electrolytic capacitor whose layers are sequentially formed, and which is suitable for being incorporated into a circuit board. It is possible to provide an electrolytic capacitor, a substrate with a built-in three-terminal solid electrolytic capacitor, and a method for manufacturing the same.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Parts Printed On Printed Circuit Boards (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003244246A AU2003244246A1 (en) | 2002-06-18 | 2003-06-18 | Solid electrolytic capacitor, board with built-in solid electrolytic capacitor, and method for producing them |
US10/518,683 US6989982B2 (en) | 2002-06-18 | 2003-06-18 | Solid electrolytic capacitor, circuit board having built-in solid electrolytic capacitor and methods for manufacturing them |
JP2004514095A JP4208833B2 (ja) | 2002-06-18 | 2003-06-18 | 固体電解コンデンサおよび固体電解コンデンサ内蔵基板ならびにそれらの製造方法 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002177547 | 2002-06-18 | ||
JP2002-177546 | 2002-06-18 | ||
JP2002177546 | 2002-06-18 | ||
JP2002-177547 | 2002-06-18 |
Publications (1)
Publication Number | Publication Date |
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WO2003107367A1 true WO2003107367A1 (ja) | 2003-12-24 |
Family
ID=29738438
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/007733 WO2003107367A1 (ja) | 2002-06-18 | 2003-06-18 | 固体電解コンデンサおよび固体電解コンデンサ内蔵基板ならびにそれらの製造方法 |
Country Status (5)
Country | Link |
---|---|
US (1) | US6989982B2 (ja) |
JP (1) | JP4208833B2 (ja) |
AU (1) | AU2003244246A1 (ja) |
TW (1) | TWI221620B (ja) |
WO (1) | WO2003107367A1 (ja) |
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JP2007005760A (ja) * | 2005-05-23 | 2007-01-11 | Matsushita Electric Ind Co Ltd | チップ形固体電解コンデンサ |
WO2019239937A1 (ja) * | 2018-06-11 | 2019-12-19 | 株式会社村田製作所 | コンデンサアレイ、複合電子部品、コンデンサアレイの製造方法、及び、複合電子部品の製造方法 |
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US8934257B1 (en) * | 2012-05-30 | 2015-01-13 | Juniper Networks, Inc. | Apparatus and methods for coplanar printed circuit board interconnect |
TWI510152B (zh) * | 2013-07-10 | 2015-11-21 | Ind Tech Res Inst | 內藏電容模組 |
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- 2003-06-18 US US10/518,683 patent/US6989982B2/en not_active Expired - Fee Related
- 2003-06-18 WO PCT/JP2003/007733 patent/WO2003107367A1/ja active Application Filing
- 2003-06-18 TW TW092116555A patent/TWI221620B/zh not_active IP Right Cessation
- 2003-06-18 JP JP2004514095A patent/JP4208833B2/ja not_active Expired - Fee Related
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007005760A (ja) * | 2005-05-23 | 2007-01-11 | Matsushita Electric Ind Co Ltd | チップ形固体電解コンデンサ |
WO2019239937A1 (ja) * | 2018-06-11 | 2019-12-19 | 株式会社村田製作所 | コンデンサアレイ、複合電子部品、コンデンサアレイの製造方法、及び、複合電子部品の製造方法 |
CN112243529A (zh) * | 2018-06-11 | 2021-01-19 | 株式会社村田制作所 | 电容器阵列、复合电子部件、电容器阵列的制造方法以及复合电子部件的制造方法 |
JPWO2019239937A1 (ja) * | 2018-06-11 | 2021-04-22 | 株式会社村田製作所 | コンデンサアレイ、複合電子部品、コンデンサアレイの製造方法、及び、複合電子部品の製造方法 |
US11469053B2 (en) | 2018-06-11 | 2022-10-11 | Murata Manufacturing Co., Ltd. | Capacitor array, composite electronic component, method for manufacturing capacitor array, and method for manufacturing composite electronic component |
JP7151764B2 (ja) | 2018-06-11 | 2022-10-12 | 株式会社村田製作所 | コンデンサアレイ、複合電子部品、コンデンサアレイの製造方法、及び、複合電子部品の製造方法 |
CN111755251A (zh) * | 2019-03-29 | 2020-10-09 | 株式会社村田制作所 | 电容器阵列以及复合电子部件 |
Also Published As
Publication number | Publication date |
---|---|
TWI221620B (en) | 2004-10-01 |
TW200402074A (en) | 2004-02-01 |
US20050225930A1 (en) | 2005-10-13 |
US6989982B2 (en) | 2006-01-24 |
JPWO2003107367A1 (ja) | 2005-10-20 |
AU2003244246A1 (en) | 2003-12-31 |
JP4208833B2 (ja) | 2009-01-14 |
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