WO2007077883A1 - コンデンサ及びその製造方法 - Google Patents
コンデンサ及びその製造方法 Download PDFInfo
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- WO2007077883A1 WO2007077883A1 PCT/JP2006/326092 JP2006326092W WO2007077883A1 WO 2007077883 A1 WO2007077883 A1 WO 2007077883A1 JP 2006326092 W JP2006326092 W JP 2006326092W WO 2007077883 A1 WO2007077883 A1 WO 2007077883A1
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- Prior art keywords
- oxide film
- capacitor
- solution
- dissolved
- metal
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Classifications
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- 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
- H01G9/0029—Processes of manufacture
- H01G9/0032—Processes of manufacture formation of the dielectric layer
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- 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
- H01G11/46—Metal oxides
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- 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
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- 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
- H01G9/04—Electrodes or formation of dielectric layers thereon
- H01G9/042—Electrodes or formation of dielectric layers thereon characterised by the material
-
- 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
- H01G9/07—Dielectric layers
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/16—Printed circuits incorporating printed electric components, e.g. printed resistors, capacitors or inductors
- H05K1/162—Printed circuits incorporating printed electric components, e.g. printed resistors, capacitors or inductors incorporating printed capacitors
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- 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 capacitor and a manufacturing method thereof. More specifically, the present invention relates to a capacitor having a large capacity, a low ESR (equivalent series resistance) in a high frequency range and a low leakage current, and a method for manufacturing the same.
- ESR Equivalent series resistance
- ESR electronic-semiconductor
- the capacitance is proportional to the relative dielectric constant and inversely proportional to the thickness of the dielectric layer, it is required to form a thin and uniform dielectric layer having a high relative dielectric constant.
- a method for forming a dielectric layer there are a dry film forming method and a wet film forming method.
- the dry film forming method include film forming methods such as sputtering, CVD, and vacuum deposition.
- the equipment cost will increase, such as maintaining a high vacuum and introducing an expensive film forming apparatus.
- Patent Document 1 Japanese Patent Application Laid-Open No. 60-116119
- Patent Document 2 Japanese Patent Application Laid-Open No. 61-30678
- Patent Document 3 discloses a technique for forming a barium titanate thin film on a substrate by an alkoxide method.
- Patent Document 4 discloses that a metal titanium substrate is treated in an aqueous solution of an alkali metal to thereby form an alkali metal titanate on the surface of the substrate. After forming, by treating with an aqueous solution containing metal ions such as strontium and calcium, the alkali metal is replaced with a metal such as strontium and calcium. A technique for forming a composite titanium oxide film is disclosed. Further, Japanese Patent Application Laid-Open No.
- Patent Document 5 discloses that a titanium oxide film is formed on a substrate by an electrochemical method, and the film is anodized in an aqueous solution of barium to form barium titanate. A method for producing a coating is disclosed.
- Patent Document 1 Japanese Patent Laid-Open No. 60-116119
- Patent Document 2 Japanese Patent Laid-Open No. 61-30678
- Patent Document 3 Japanese Patent Laid-Open No. 5-124817
- Patent Document 4 Japanese Patent Laid-Open No. 2003-206135
- Patent Document 5 Japanese Patent Laid-Open No. 11 172489
- An object of the present invention is to provide a capacitor having a large capacity, a low ESR (equivalent series resistance) in a high frequency range and a low leakage current, a manufacturing method thereof, and an electronic device using the capacitor. To do.
- the present inventors have used a composite oxide film obtained by using an acid film obtained by electrolytically oxidizing a valve action metal material as a raw material. As a result, it was found that a small, large-capacity, low ESR, low leakage current capacitor could be realized, and based on this knowledge, the present invention was completed.
- the present invention is as follows.
- Capacitor with a membrane
- Metal ions and organic bases are dissolved in the oxide film obtained by electrolytic oxidation of the substrate surface.
- a solid electrolyte layer laminated on the composite oxide film A solid electrolyte layer laminated on the composite oxide film.
- a solid electrolytic capacitor comprising a conductor layer laminated on the solid electrolyte layer.
- valve metal element is a titanium element.
- the method includes at least a step of forming an oxide film by electrolytic oxidation of a valve metal element and a step of reacting the formed oxide film with metal ions dissolved in an organic solvent. Capacitor manufacturing method.
- At least a step of forming an oxide film by electrolytic oxidation of a valve action metal element, a step of reacting the formed oxide film with a solution in which metal ions and an organic base are dissolved, and a step of firing are included.
- Capacitor manufacturing method At least a step of forming an oxide film by electrolytic oxidation of a valve action metal element, a step of reacting the formed oxide film with a solution in which metal ions and an organic base are dissolved, and a step of firing are included.
- a step of forming an oxide film by electrolytic oxidation of a valve metal element, a step of reacting the formed oxide film with a solution in which metal ions and an organic base are dissolved, and the composite oxide film A method for producing a solid electrolytic capacitor, comprising at least a step of laminating a solid electrolyte layer on the substrate and a step of laminating a conductor layer on the solid electrolyte layer.
- a composite oxide film having a high dielectric constant can be obtained by reacting an oxide film obtained by electrolytic oxidation of a valve action metal material with a solution in which metal ions and an organic base are dissolved.
- the composite oxide film it is possible to obtain a small, large-capacity, low ESR, low leakage current capacitor.
- the capacitor of the present invention is obtained by reacting an oxide film obtained by electrolytic oxidation of a substrate surface containing a valve action metal element and a solution in which metal ions and an organic base are dissolved. A composite oxide film is provided.
- the valve metal element is a metal element that forms a stable oxide film and exhibits a valve action.
- valve action metal elements include aluminum, tantalum, niobium, titanium, hafnium, zirconium, zinc, tungsten, bismuth, and antimony. Of these, aluminum, tantalum, titanium and niobium are preferred, and titanium is particularly preferred.
- the substrate containing the valve action metal element is not particularly limited as long as it contains the valve action metal element. Examples thereof include a valve action metal alone or an alloy containing the valve action metal.
- the substrate is not particularly limited as long as it can be electrolytically oxidized, but a plate-like, foil-like or rod-like one is particularly preferred.
- the foil-like substrate preferably has a foil thickness of 5 to 150 m.
- the size varies depending on the purpose of use, but the flat element unit is preferably about 1 to 50 mm in width and about 1 to 50 mm in length, more preferably 2 to 20 mm in width and 2 to 20 mm in length, more preferably A rectangular shape having a width of 2 to 5 mm and a length of 2 to 6 mm is preferably used.
- the substrate may be a sintered body! Sintered body, powder containing valve-acting metal element is pressed into a predetermined shape to obtain a molded body, and the molded body is obtained by, for example, heating to 500 to 2000 ° C. and sintering. Can do.
- a part of the metal wire (or metal foil) whose main component is valve action metal such as tantalum, niobium, and aluminum is embedded in the molded body and sintered together with the molded body.
- the metal wire (or metal foil) at the part where the physical strength protrudes can be designed as an anode lead wire (also abbreviated as a lead wire in the case of foil, the same applies hereinafter) of the sintered body.
- the metal wire (or metal foil) is connected by welding, etc.
- the metal wire can be used as an anode lead line.
- the wire diameter of such a metal wire is usually 1 mm or less, and the thickness in the case of a metal foil is usually 1 mm or less.
- a powder containing a valve metal element is attached to a valve metal foil such as aluminum, tantalum, or niobium, and sintered, whereby a part of the valve metal foil is anoded. It may be a sintered body as a lead-out part.
- the surface of the substrate may be cleaned by a known method such as an etching process before electrolytic oxidation, or the specific surface area may be increased by a known method such as a porous layer. It is preferable to keep it.
- a predetermined region of the base body containing the valve action metal element is immersed in a chemical conversion solution to perform conversion at a predetermined voltage / current density.
- a chemical conversion solution to perform conversion at a predetermined voltage / current density.
- the masking material is not limited by the material.
- a general heat-resistant resin preferably a heat-resistant resin that is soluble or swellable in a solvent, or a precursor thereof, a composition comprising inorganic fine powder and a cellulose-based resin (Japanese Patent Laid-Open No. 11-2009). 80596) can be used.
- the material used for the masking material include polysulfone (PPS), polyethersulfone (PES), cyanate ester resin, fluorine resin (tetrafluoroethylene, tetrafluoroethylene). (Ethylene (perfluoroalkyl vinyl ether copolymer)), polyimide and derivatives thereof. These can be dissolved or dispersed in an organic solvent, and can be easily prepared as a dispersion having an arbitrary solid content concentration (and hence viscosity) suitable for coating operation.
- Examples of the chemical conversion solution include a solution of an acid and Z or a salt thereof, for example, a solution containing at least one of phosphoric acid, sulfuric acid, succinic acid, boric acid, adipic acid and a salt thereof.
- the concentration of the chemical conversion liquid is usually 0.1 to 30% by mass, preferably 1 to 20% by mass.
- the temperature of the chemical liquid is normal. ⁇ 90. C ⁇ preferably 20-80. C.
- Constant current formation and constant voltage formation are usually performed under conditions of current density 0.1 to: LOOO mAZcm 2 , voltage 2 to 400 V, time 1 millisecond to 400 minutes, preferably current density 1 to 400 mAZcm 2 , voltage 5 to 70V, time 1 second to 300 minutes.
- an oxide film is formed on the surface of the substrate.
- the thickness of the oxide film is not limited as long as a composite oxide film can be formed in the next step, preferably in the range of 1 to 4000 nm, and more preferably in the range of 5 to 2000 nm. .
- the oxide film formed by the above-described electro-oxidation process is changed into a composite oxide film by reacting with a solution in which metal ions and organic bases are dissolved.
- Examples of the solvent used in the solution in which the metal ion and the organic base are dissolved include water, organic solvents such as alcohol and ketone, and mixed solvents thereof. In the present invention, water is preferable. .
- the metal ion dissolved in the solution is not particularly limited as long as it reacts with the valve metal and can obtain a high relative dielectric constant as a composite oxide film. Ions capable of obtaining a ferroelectric film in combination with a valve metal are preferred. Preferable examples include alkaline earth metals such as calcium, strontium, and norlium, and lead. Of these, barium is preferred.
- the metal compound dissolved in the solution is preferably a water-soluble compound.
- a water-soluble compound Specifically, calcium chloride, calcium nitrate, calcium acetate, strontium chloride, strontium nitrate, barium hydroxide, barium chloride, barium nitrate. , Barium acetate, lead nitrate, lead acetate and the like.
- These metal compounds may be used alone or in combination of two or more in any ratio.
- the organic base to be added is not particularly limited, but at least one of evaporation, sublimation and Z or thermal decomposition at a temperature equal to or lower than the temperature at the time of drying or baking described below and at atmospheric pressure or reduced pressure.
- Organic bases that are gaseous by means are preferred, for example, organic bases such as TMAH (hydroxyl tetramethylammonium hydroxide), tetramethylammonium hydroxide, choline and the like.
- TMAH hydroxyl tetramethylammonium hydroxide
- tetramethylammonium hydroxide choline and the like.
- the solution in which the metal ions and the organic base are dissolved has a pH of 11 or more, more preferably 13 or more, and particularly preferably 14 or more. By increasing the pH, a composite oxide film with higher crystallinity can be produced. The higher the crystallinity, the higher the relative dielectric constant of the film Therefore it is desirable.
- the above-mentioned organic base can be used as the pH adjuster used to adjust the pH of the solution.
- an alkali metal hydroxide such as lithium hydroxide, sodium hydroxide, or potassium hydroxide
- alkali metal remains in the resulting composite oxide film. Since characteristics as functional materials such as dielectric materials and piezoelectric materials may be inferior, it is preferable to add an organic base such as hydroxyammonium tetramethylammonium.
- the solution While stirring the solution in which the prepared metal ions and organic base are dissolved, the solution is heated to a temperature in the range of usually 40 ° C to the boiling point of the solution, preferably 80 ° C, in the range of the boiling point of the solution at normal pressure. Holding and reacting with the valve metal oxide coating.
- the reaction time is usually 10 minutes or longer, preferably 1 hour or longer. This reaction is preferably performed in a non-electric field. Details of the mechanism are unknown, but conversion to a complex oxide film proceeds well even in the absence of an electric field under the conditions of reaction in the presence of an organic base.
- impurity ions are removed from the reaction site using methods such as electrodialysis, ion exchange, water washing, and osmosis membrane, if necessary, and then dried. Drying is usually performed at room temperature to 150 ° C for 1 to 24 hours. The drying atmosphere is not particularly limited and can be performed in the air or in a reduced pressure.
- the oxide film can be substantially entirely converted into a complex oxide film, but may be limited to a partial shift.
- a composite oxide film is formed by the above method, and it is preferable to fire the composite oxide film in order to further increase the relative dielectric constant.
- the firing conditions can be any temperature, time, etc. as long as the dielectric constant of the composite oxide film can be increased.
- the conditions are determined experimentally depending on the composite oxide to be fired. Undeterminable force
- the temperature, time, etc. at which the relative permittivity is improved by 10 times or more than before firing are preferred
- the fired composite oxide film may be in a semiconductor state due to oxygen defects depending on the firing atmosphere.
- the annealing condition is a solution to the semiconductor state of the complex oxide film. Any conditions can be used as long as the time and temperature can be turned off and insulated. The conditions are individually determined experimentally depending on the complex oxide to be annealed, and cannot be determined in general, but it is preferable that the oxygen defect be reduced to a level at which the composite oxide film can be used as a capacitor. As long as the leakage current value due to the is low, any condition is acceptable.
- the complex oxide film constituting the capacitor of the present invention preferably has a relative dielectric constant of 80 to 15000.
- the capacitor of the present invention is provided with electrodes for forming a force capacitor element comprising the above-described composite oxide film.
- the electrode is generally made of an electrode material used in capacitors.
- the electrode material manganese oxide; conductive polymer; metals such as nickel, silver, and copper are used.
- a carbon paste is deposited on the composite oxide film formed on the surface of the substrate, and then a silver paste is further adhered to the external lead.
- a capacitor composed of a substrate, a complex oxide film, and an electrode can be formed. Note that a structure in which an oxide film is partially converted into a complex oxide film is also included in the present invention.
- the solid electrolytic capacitor of the present invention is a substrate comprising a valve action metal element, and the surface of the substrate is subjected to an electrolytic acid to react an oxide film with a solution in which metal ions and an organic base are dissolved.
- the substrate acts as the anode of the capacitor, and the solid electrolyte layer and conductor layer act as the cathode of the capacitor.
- a conductive polymer may be used as the solid electrolyte layer used in the capacitor of the present invention.
- a compound having a thiophene skeleton, a compound having a quinoxaline skeleton, a compound having a pyrrole skeleton, a compound having a furan skeleton, a compound having a furin skeleton, etc. is included as a repeating unit. Things.
- the conductive polymer that forms the solid electrolyte layer is not limited to these.
- Compounds having a thiophene skeleton used for obtaining a conductive polymer include 3-methylthiophene, 3-ethylthiophene, 3-propylthiophene, 3-butylthiophene, 3-pentylthiophene, and 3-hexyl.
- examples of the compound having a thiophene skeleton include those in which a ring such as a benzene ring or a naphthalene ring is condensed with a thiophene ring. Specifically, the compound has a 1,3 dihydrobenzo [c] thiophene skeleton.
- Compounds having a quinoxaline skeleton include 1,3 dihydroceno [3,4-b] quinoxaline, 1,3 dihydroceno [3,4-b] quinoxaline-4-oxide, 1,3 dihydrothieno [3 , 4-b] quinoxaline 1,4,9-dioxide and the like.
- Examples of the compound having a pyrrole skeleton include 3-methyl pyrrole, 3-ethyl pyrrole, 3-propyl pyrrole, 3-butyl pyrrole, 3-pentyl pyrrole, 3-hexyl pyrrole, 3-heptyl pyrrole, 3-octyl pyrrole, 3 —Norubirol, 3-decylpyrrolone, 3-fluoropyrrole, 3-chloropyrrole, 3-bromopyrrolone, 3-cyanopyrrole, 3,4-dimethylpyrrole, 3,4-jetylpyrrole, 3, 4 Examples thereof include derivatives such as —butylene pyrrole, 3,4-methylenedioxypyrrole, and 3,4-ethylenedioxypyrrole.
- Examples of the compound having a furan skeleton include 3-methylfuran, 3-ethylfuran, 3-propylfuran, 3-butylfuran, 3-pentylfuran, 3-hexylfuran, 3-heptylfuran, 3-octylfuran, 3- Norfuran, 3-decylfuran, 3-fluorofuran, 3-chlorofuran, 3-bromofuran, 3-cyanofuran, 3,4-dimethylfuran, 3,4 Jetylfuran, 3,4-butylenefuran, 3, 4 Derivatives such as —methylenedioxyfuran and 3,4-ethylenedioxyfuran can be mentioned. These compounds are commercially available products or can be prepared by known methods. However, the present invention is not limited to these.
- the compounds having a skeleton include 2-methylaline, 2-ethylaline, 2-propylaniline, 2-butylaniline, 2-pentylaniline, 2-hexylaniline, 2-heptyla. -Phosphorus, 2-Octylaline, 2-Noruroline, 2-Desila-Pholine, 2-Fluoro-Pholine, 2-Chloro-Arine, 2-Bromoa-Pholine, 2-Cyanoa-Lin, 2, Derivatives such as 5 dimethylaline, 2,5 jetylaline, 3,4 butylenealine, 3,4-methylenedioxylin, 3,4-ethylenedioxylin, etc. it can. These compounds can be prepared commercially or by known methods, but are not limited to the present invention! /.
- a compound selected from the above compound group may be used in combination, and used as a multi-component copolymer.
- the composition ratio of the polymerizable monomer depends on the polymerization conditions, and the composition ratio and the polymerization conditions can be confirmed by a simple test.
- the conductive polymer can be obtained by a chemical oxidative polymerization method or an electrolytic oxidative polymerization method.
- a compound that is industrially inexpensive and easy to handle in production is preferred.
- Fe (III) compounds such as salt
- Anhydrous salt ⁇ Aluminum Z salt ⁇ Cuprous; Alkali metal persulfate; Persulfate ammonium salt; Peroxides; Potassium permanganate 2,3 dichloro-5,6 dicyanol 1,4 monobenzoquinone (DDQ), tetrachloro 1,4-benzoquinone, tetracyanone 1,4 quinones such as benzoquinone; halogens such as iodine, bromine; Peracids: sulfuric acid, fuming sulfuric acid, sulfur trioxide, black mouth sulfuric acid, fluorosulfuric acid, amide sulfuric acid, sulfonic acid, ozone and the like.
- the basic compound of the organic acid ion that forms the Fe (organic acid ion) salt includes organic sulfonic acid or organic carboxylic acid, organic phosphoric acid, organic boric acid; polymer electrolysis Q-on.
- organic sulfonic acids include benzene sulfonic acid, p-toluene sulfonic acid, methane sulphonic acid, ethane sulphonic acid, ⁇ -sulphonanaphthalene, ⁇ -sulfonaphthalene, naphthalenedisulfonic acid, alkylnaphthalene sulphonic acid (butyl as the alkyl group, Triisopropyl, di-t-butyl, etc.).
- organic carboxylic acid include acetic acid, propionic acid, benzoic acid, and succinic acid.
- examples of the polymer electrolyte ion include polyacrylic acid, polymethacrylic acid, polystyrene sulfonic acid, polyvinyl sulfonic acid, polybulu sulfuric acid, poly a-methyl sulfonic acid, polyethylene sulfonic acid, and polyphosphoric acid. These organic acid ions are not limited to these.
- examples of counterions of the above-mentioned ions include H +; alkali metal ions such as Na + and K +; ammonium ions substituted with a tetramethyl group, a tetraethyl group, a tetrabutyl group, a tetraphenyl group, and the like.
- the invention is not particularly limited to these.
- trivalent Fe compounds cuprous chloride, alkali persulfate, ammonium persulfate, manganic acid, and quinones are particularly preferable. is there.
- the solid electrolyte layer used in the present invention may be one in which counter ions having dopant ability coexist.
- counter ions having a dopant ability include an electrolyte compound having an oxidizing agent ion (reduced form of an oxidizing agent) produced from the oxidizing agent as a counter ion, or other anion electrolytes.
- 5 such as PF-, SbF-, AsF-
- Group B element halides Group 3B element halides such as BF—;
- Halon such as Br—, C1—; Halogen such as CIO—; A1C1 "
- polyacrylic acid polymethacrylic acid
- polystyrene sulfonic acid polyvinyl
- polymer electrolytes such as sulfonic acid, polysulfuric acid, poly-a-methylsulfonic acid, polyethylenesulfonic acid, and polyphosphoric acid, but are not necessarily limited thereto.
- a high molecular or low molecular organic sulfonic acid compound or an aryl sulfonic acid salt dopant in which polyphosphoric acid is preferred is particularly preferable.
- arylene sulfonate dopants include salts such as benzene sulfonic acid, toluene sulfonic acid, naphthalene sulfonic acid, anthracene sulfonic acid, anthraquinone sulfonic acid, and derivatives thereof.
- the monomer concentration in the production of the conductive polymer varies depending on the type of substituent in the compound used as the monomer and the type of solvent, etc., but generally ranges from 10_3 to 10 mol Z liter.
- the range of 10 1 2 to 5 mol Z liters is more preferred.
- the reaction temperature is determined by the reaction method and is not particularly limited, but is generally selected within a temperature range of -70 ° C to 250 ° C. Desirably, it is ⁇ 30 to 150 ° C., and further, it is desirably performed in a temperature range of 10 to 30 ° C.
- the reaction solvent used in the production of the conductive polymer may be any solvent that can dissolve the monomer, the oxidizing agent, the counterion having the dopant ability, or each of them alone, such as tetrahydrofuran, Ethers such as dioxane and jetyl ether, or aprotic polar solvents such as dimethylformamide, acetonitrile, benzonitrile, N-methylpyrrolidone, and dimethyl sulfoxide; esters such as ethyl acetate and butyl acetate; Non-aromatic chlorinated solvents such as nitromethane, nitroethane, nitrobenzene, etc .; alcohols such as methanol, ethanol, propanol, etc .; organic acids such as formic acid, acetic acid, propionic acid, or acids of the organic acids Anhydrides (eg, acetic anhydride, etc.); ketones; water, etc. Al can be used as a solvent that can
- a monomer, an oxidant, and Z or a counter-one having a dopant ability may be used as a single solution dissolved in a reaction solvent; the oxidant and Z Alternatively, it may be used in the form of two solutions consisting of a solution of a dopant having a dopant ability dissolved in a reaction solvent and a solution of a monomer dissolved in the reaction solvent; -ON and monomer, each dissolved in reaction solvent It can be used in three solutions.
- a solid electrolyte layer can be formed on the composite oxide by applying these solutions onto the composite oxide film and oxidatively polymerizing them.
- the solid electrolyte layer used in the present invention has a conductivity of preferably 1SZcm or more, more preferably 5SZcm or more, and particularly preferably lOSZcm or more.
- the conductor layer laminated on the solid electrolyte layer is not particularly limited as long as it becomes an electrode of a capacitor.
- a metal thin film obtained by physical film formation such as vapor deposition or sputtering, or by applying pastes such as metal-containing paste can be used.
- the carbon paste layer and the metal powder-containing conductive layer force may be used.
- the conductive layer containing metal powder is in close contact with the solid electrolyte layer through the carbon paste layer, and acts as a cathode for the capacitor and at the same time serves as an adhesive layer for bonding the cathode lead terminal of the final capacitor product.
- the thickness of the metal-containing conductive layer is not limited, but is generally about 1 to: about LOO ⁇ m, preferably about 5 to 50 ⁇ m.
- a lead frame (lead terminal) is formed or connected to each electrode of the capacitor element obtained as described above by a known method or the like, and sealed with an electrically insulating grease such as epoxy grease.
- a capacitor can be obtained.
- the lead frame material is not particularly limited as long as it is generally used, but preferably copper-based (for example, Cu-Ni-based, Cu-Ag-based, Cu-Su-based, Cu-Fe-based, Cu--based) Ni-Ag-based, Cu-Ni-Sn-based, Cu-Co-P-based, Cu-Zn-Mg-based, Cu-Sn-Ni-P-based alloys) or copper-based materials on the surface If it is made of the applied material, the lead frame can be chamfered with good workability.
- the capacitor of the present invention can be used in electronic components and electronic devices.
- a high-density and multifunctional circuit board can be obtained by incorporating the function of the capacitor element in a printed board, that is, in a multilayer board itself such as a build-up board. Since the capacitor of the present invention has characteristics of low ESR and low leakage current, it can cope with high speed integration and high integration of IC chips and the like.
- Titanium foil made by Sank Metal Co., Ltd.
- a thickness of 20 / zm and a purity of 99.9% cut to 3.3 mm width is cut into 13 mm lengths, and one short side of this foil piece is made of metal It was fixed by welding to the guide.
- a 0.8 mm wide line was drawn with a polyimide resin solution (manufactured by Ube Industries Co., Ltd.) at a location 7 mm from the end of the titanium foil where the titanium foil was not fixed, and was masked by drying at about 180 ° C. for 30 minutes.
- the part of the titanium foil where the end force is not masked up to the masked part is immersed in a 5% by weight phosphoric acid aqueous solution and subjected to electrolytic oxidation for 120 minutes at a current density of 30mAZcm 2 , formation voltage of 15V and temperature of 40 ° C. Then, it was pulled out from the phosphoric acid aqueous solution, washed with water and dried to form an acid-titanium layer on the surface of the titanium foil.
- the treated foil was washed with water and dried, and a polyimide resin having a width of 0.8 mm centered on a 5 mm portion from the tip of the foil was applied linearly on the composite oxide film layer, and 180 ° C. And then masked by drying for 1 hour.
- the initial characteristics show the capacitance and loss relationships at 120 Hz.
- the leakage current was measured 1 minute after applying a voltage of 2V. The measurement results were as follows.
- Titanium foil with a purity of 99.9% with a thickness of 20 m (Sunk Metal Co., Ltd.) cut to 3.3 mm width is cut into 13 mm lengths, and one short side of this foil piece is made of metal It was fixed by welding to the id.
- a 0.8 mm wide line was drawn with a polyimide resin solution (manufactured by Ube Industries Co., Ltd.) at a location 7 mm from the end of the titanium foil where the titanium foil was not fixed, and was masked by drying at about 180 ° C. for 30 minutes.
- the part of the titanium foil where the end force is not masked is also immersed in a 5% by weight phosphoric acid aqueous solution, and the current density is 30mAZcm 2 , the formation voltage is 15V, and the temperature is 40 ° C for 120 minutes. Then, it was pulled out from the phosphoric acid aqueous solution, washed with water and dried to form a titanium oxide layer on the surface of the titanium foil.
- a polyimide resin having a width of 0.8 mm centered on a 5 mm portion from the tip of the treated foil was applied linearly on the composite oxide film layer, dried at 180 ° C for 1 hour, and masked. 4.
- the aqueous dispersion was dropped at 5 / z L, stretched over the entire cathode portion, naturally dried for 1 hour, and then dried at 125 ° C. for 30 minutes to form a solid electrolyte layer.
- a carbon paste and a silver paste were sequentially applied on the solid electrolyte layer to complete a capacitor element.
- Titanium foil with a purity of 99.9% with a thickness of 20 m (manufactured by Sunk Metal Co., Ltd.) cut to 3.3 mm width and cut into lengths of 13 mm each to become the cathode part 3.3 mm x 4.6 mm
- a barium titanate film with a thickness of 1 ⁇ m was formed by sputtering.
- the relative permittivity of this noble titanate film was 220.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US12/159,699 US7697267B2 (en) | 2005-12-28 | 2006-12-27 | Capacitor and method for manufacturing same |
| JP2007535735A JP4036466B2 (ja) | 2005-12-28 | 2006-12-27 | コンデンサ及びその製造方法 |
| CN2006800497747A CN101351857B (zh) | 2005-12-28 | 2006-12-27 | 电容器及其制造方法 |
| EP06843474.5A EP1978533B1 (en) | 2005-12-28 | 2006-12-27 | Capacitor and method for manufacturing same |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005377040 | 2005-12-28 | ||
| JP2005-377040 | 2005-12-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007077883A1 true WO2007077883A1 (ja) | 2007-07-12 |
Family
ID=38228238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2006/326092 Ceased WO2007077883A1 (ja) | 2005-12-28 | 2006-12-27 | コンデンサ及びその製造方法 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US7697267B2 (ja) |
| EP (1) | EP1978533B1 (ja) |
| JP (1) | JP4036466B2 (ja) |
| CN (1) | CN101351857B (ja) |
| TW (1) | TWI391969B (ja) |
| WO (1) | WO2007077883A1 (ja) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009130004A (ja) * | 2007-11-21 | 2009-06-11 | Sanyo Electric Co Ltd | 固体電解コンデンサ |
| EP2099041A1 (en) * | 2008-03-04 | 2009-09-09 | Nec Tokin Corporation | Conductive polymer and solid electrolytic capacitor using the same |
| JP2012209289A (ja) * | 2011-03-29 | 2012-10-25 | Sanyo Electric Co Ltd | 固体電解コンデンサ及びその製造方法 |
| EP2312597A4 (en) * | 2008-07-29 | 2018-04-04 | Showa Denko K.K. | Method for manufacturing niobium solid electrolytic capacitor |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5952551B2 (ja) | 2011-12-12 | 2016-07-13 | Necトーキン株式会社 | 導電性高分子組成物およびその製造方法、導電性高分子材料の製造方法、導電性基材の製造方法、電極の製造方法、電子デバイスの製造方法並びに固体電解コンデンサの製造方法 |
| JP5872872B2 (ja) * | 2011-12-12 | 2016-03-01 | Necトーキン株式会社 | 導電性高分子組成物の製造方法、導電性高分子材料の製造方法、導電性基材の製造方法、電極の製造方法および固体電解コンデンサの製造方法 |
| CN105023752B (zh) * | 2014-04-28 | 2017-07-28 | 中国科学院理化技术研究所 | 一种印刷式柔性电解电容及其制作方法 |
| CN104810163B (zh) * | 2014-07-18 | 2017-08-08 | 纳米新能源(唐山)有限责任公司 | 石墨烯超级电容器的制备方法、石墨烯超级电容器及储能系统 |
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- 2006-12-27 CN CN2006800497747A patent/CN101351857B/zh not_active Expired - Fee Related
- 2006-12-27 US US12/159,699 patent/US7697267B2/en not_active Expired - Fee Related
- 2006-12-27 EP EP06843474.5A patent/EP1978533B1/en not_active Not-in-force
- 2006-12-27 JP JP2007535735A patent/JP4036466B2/ja not_active Expired - Fee Related
- 2006-12-28 TW TW095149509A patent/TWI391969B/zh not_active IP Right Cessation
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009130004A (ja) * | 2007-11-21 | 2009-06-11 | Sanyo Electric Co Ltd | 固体電解コンデンサ |
| EP2099041A1 (en) * | 2008-03-04 | 2009-09-09 | Nec Tokin Corporation | Conductive polymer and solid electrolytic capacitor using the same |
| US7602602B2 (en) | 2008-03-04 | 2009-10-13 | Nec Tokin Corporation | Conductive polymer and solid electrolytic capacitor using the same |
| CN101525410B (zh) * | 2008-03-04 | 2011-11-16 | Nec东金株式会社 | 导电聚合物和使用该导电聚合物的固体电解质电容器 |
| EP2312597A4 (en) * | 2008-07-29 | 2018-04-04 | Showa Denko K.K. | Method for manufacturing niobium solid electrolytic capacitor |
| JP2012209289A (ja) * | 2011-03-29 | 2012-10-25 | Sanyo Electric Co Ltd | 固体電解コンデンサ及びその製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20080316681A1 (en) | 2008-12-25 |
| JP4036466B2 (ja) | 2008-01-23 |
| US7697267B2 (en) | 2010-04-13 |
| TWI391969B (zh) | 2013-04-01 |
| JPWO2007077883A1 (ja) | 2009-06-11 |
| CN101351857A (zh) | 2009-01-21 |
| EP1978533B1 (en) | 2016-11-16 |
| EP1978533A1 (en) | 2008-10-08 |
| EP1978533A4 (en) | 2013-07-31 |
| TW200746203A (en) | 2007-12-16 |
| CN101351857B (zh) | 2011-10-19 |
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