Solid Electrolytic Capacitor (e.g., Dry Electrolytic Capacitor) Patents (Class 361/523)
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Patent number: 8305734Abstract: An insulating encapsulation structure is applied to a chip type solid electrolytic capacitor that includes an aluminum metallic body having an aluminum core layer. An upper oxide film and a lower oxide film respectively having fine holes on their surfaces are respectively formed on the top and the bottom of the aluminum core layer. On side surfaces of the metallic body is a plurality of cut burrs. The upper oxide film and the lower oxide film of the metallic body are respectively separated by a separating layer to form an anode and a cathode. The insulating encapsulation structure includes an insulating cover layer enclosing an outer surface of the metallic body to cover the cut burrs. Thereby, the required chemical conversion process is reduced along with current leakage, the overall manufacturing cost is lowered, and the mechanical strength for the edge of the metallic body is reinforced.Type: GrantFiled: October 19, 2010Date of Patent: November 6, 2012Assignee: Apaq Technology Co., Ltd.Inventors: Chi-Hao Chiu, Ming-Tsung Chen, Chiao-Yinms Yang
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Patent number: 8305735Abstract: A stacked solid electrolytic capacitor with positive multi-pin structure includes a plurality of capacitor units, a substrate unit and a package unit. The positive electrode of each capacitor unit has a positive pin extended outwards therefrom. The positive pins are divided into a plurality of positive pin units that are separated from each other and electrically stacked onto each other. The negative electrode of each capacitor unit has a negative pin extended outwards therefrom. The negative pins are divided into a plurality of negative pin units. The negative pin units are separated from each other and the negative pins of each negative pin unit are electrically stacked onto each other. The substrate unit has a positive guiding substrate electrically connected to the positive pins and a negative guiding substrate electrically connected to the negative pins. The package unit covers the capacitor units and one part of the substrate unit.Type: GrantFiled: November 30, 2009Date of Patent: November 6, 2012Assignee: Apaq Technology Co., Ltd.Inventors: Yui-Shin Fran, Ching-Feng Lin, Chi-Hao Chiu, Chun-Chia Huang, Wen-Yen Huang
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Publication number: 20120275083Abstract: A solid electrolytic capacitor includes: a porous sintered body; an anode wire extending in a first direction and connected to the porous sintered body such that one end portion of the anode wire in the first direction is exposed; a resin package covering the porous sintered body and the anode wire; and a lead including a terminal exposed from the resin package and a lead side connector connected to the terminal. The anode wire includes a base and a connector placed at one side of the base in the first direction, a sectional area of the connector is smaller than that of the base, and the connector and the lead side connector are welded together.Type: ApplicationFiled: April 25, 2012Publication date: November 1, 2012Applicant: ROHM CO., LTD.Inventors: Takafumi YAMANAKA, Naotsugu SUGIMURA
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Patent number: 8300386Abstract: A porous valve metal thin film, a method for the production thereof, and a thin film capacitor utilizing the thin film as an anode. The porous valve metal thin film has an integral continuous structure that includes the valve metal, an outside surface, and micropores connected to the outside surface. The thin film has a surface area that is at least double a surface area of the outside surface if the outside surface of the thin film were flat. The valve metal is niobium, tantalum, a niobium alloy or a tantalum alloy and has a particle diameter within a range of 10 nm to 1 ?m. The micropores have pore diameters within a range of 10 nm to 1 ?m.Type: GrantFiled: December 28, 2005Date of Patent: October 30, 2012Assignee: Sumitomo Metal Mining Co., Ltd.Inventors: Toshiyuki Osako, Tetsufumi Komukai
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Patent number: 8300387Abstract: A capacitor assembly that is thermally and mechanically stable in high temperature environments is provided. Thermal stability is provided by enclosing and hermetically sealing the capacitor element within a housing in the presence of a gaseous atmosphere that contains an inert gas, thereby limiting the amount of oxygen and moisture supplied to the solid electrolyte of the capacitor. To provide the assembly with good mechanical stability, a polymeric restraint is also employed that is positioned adjacent to and in contact with one or more surfaces of the capacitor element. Without intending to be limited by theory, it is believed that the strength and rigidity of the polymeric restraint can help the capacitor element better withstand vibrational forces incurred during use without resulting in delamination. In this manner, the capacitor assembly is able to better function in high temperature environments.Type: GrantFiled: April 7, 2011Date of Patent: October 30, 2012Assignee: AVX CorporationInventors: Ivana Zednickova, Martin Biler
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Patent number: 8295032Abstract: The present invention provides a solid electrolytic capacitor having sufficiently low impedance at high frequencies in which a conductive polymer formed on a dielectric oxide film has good adherence to the dielectric oxide film, and a manufacturing method of the solid electrolytic capacitor. The solid electrolytic capacitor of the present invention includes a valve metal; a dielectric oxide film layer formed on a surface of the valve metal; and a solid electrolyte layer, comprising a conductive polymer layer, formed on the dielectric oxide film layer. The conductive polymer layer contains, as an additive, 0.1 wt % to 30 wt % of an organic oligomer having an average degree of polymerization of 2 to 100.Type: GrantFiled: November 20, 2008Date of Patent: October 23, 2012Assignee: NEC Tokin CorporationInventors: Yasuhisa Sugawara, Masako Ohya, Kazuyuki Katoh
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Publication number: 20120263993Abstract: Provided is an electrochemical device which is easy to produce and which has excellent characteristics. An electrochemical device includes a first electrode including an aluminum porous body having interconnecting pores and an active material filled into the pores of the aluminum porous body, a separator, and a second electrode, the first electrode, the separator, and the second electrode being stacked, in which a plurality of electrode bodies each including the first electrode, the separator, and the second electrode are stacked without being wound.Type: ApplicationFiled: April 18, 2012Publication date: October 18, 2012Applicants: SUMITOMO ELECTRIC TOYAMA CO., LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Akihisa Hosoe, Kazuki Okuno, Hajime Ota, Koutarou Kimura, Kengo Goto, Hideaki Sakaida, Junichi Nishimura
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Publication number: 20120262127Abstract: The present application is generally directed towards electrochemical energy storage devices. The devices comprise electrode material suspended in an appropriate electrolyte. Such devices are capable of achieving economical $/kWh(cycle) values and will enable much higher power and cycle life than currently used devices.Type: ApplicationFiled: April 16, 2012Publication date: October 18, 2012Applicant: EnerG2 Technologies, Inc.Inventors: Aaron Feaver, Richard Varjian, Chad Goodwin
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Patent number: 8289678Abstract: The present invention relates to a solid electrolytic capacitor and a method for preparing the same. There is provided a solid electrolytic capacitor in accordance with the invention including a capacitor element with anode polarity therein and a cathode layer formed on an outer surface thereof; an anode wire with an end portion protruding on one surface of the capacitor element; a cathode lead layer formed on the other surface the capacitor element; a molding part surrounding the capacitor element to expose the protruding end portion of the anode wire and an end portion of the cathode lead layer; and an anode terminal and a cathode terminal formed by a plating layer at both sides of the molding part. It is possible to save preparation cost by simplifying a structure and a preparation process of the solid electrolytic capacitor.Type: GrantFiled: August 14, 2008Date of Patent: October 16, 2012Assignee: Samsung Electro-Mechanics Co., LtdInventors: Jae Kwang Kim, Kwan Hyeong Kim, Chong Hoon Pak
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Patent number: 8289679Abstract: A decoupling device includes a lead frame, a capacitor unit, a metal layer, and a high dielectric organic-inorganic composite material layer. The lead frame includes a cathode terminal portion and an anode terminal portion. The capacitor unit is disposed on the lead frame. The capacitor unit includes a cathode portion, an anode portion, and an insulation portion located between the cathode portion and the anode portion. The cathode portion is electrically connected to the cathode terminal portion, and the anode portion is electrically connected to the anode terminal portion. The high dielectric organic-inorganic composite material layer is connected to the capacitor unit in parallel via the metal layer.Type: GrantFiled: May 10, 2010Date of Patent: October 16, 2012Assignee: Industrial Technology Research InstituteInventors: Cheng-Liang Cheng, Chi-Lun Chen, Li-Duan Tsai, Min-Lin Lee, Shur-Fen Liu
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Patent number: 8279581Abstract: An electrolytic solution for an electrolytic capacitor includes a solvent and an electrolyte dissolved in the solvent. This electrolyte includes at least one of a carboxylic acid and a salt of the carboxylic acid. The carboxylic acid has a carboxyl group and at least one or more of substituents bonded to each terminal carbon of a straight main chain. The substituent bonded to the each terminal carbon of the main chain is hydrophilic, and/or a hydrophilic substituent is bonded to at least one of carbons other than the both terminal carbons of the main chain.Type: GrantFiled: December 3, 2008Date of Patent: October 2, 2012Assignee: Panasonic CorporationInventor: Ryoko Takaoka
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Patent number: 8279580Abstract: Particles of active electrode material are made by blending or mixing a mixture of activated carbon, optional conductive carbon, and binder. In selected implementations, the activated carbon particles have between about 70 and 98 percent microporous activated carbon particles and between about 2 and 30 percent mesaporous activated carbon particles by weight. Optionally, a small amount of conductive particles, such as conductive carbon particles may be used. In one implementation, the binder is inert. The electrode material may be attached to a current collector to obtain an electrode for use in various energy storage devices, including a double layer capacitor.Type: GrantFiled: October 17, 2007Date of Patent: October 2, 2012Assignee: Maxwell Technologies, Inc.Inventors: Linda Zhong, Xiaomei Xi
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Patent number: 8279584Abstract: A capacitor assembly that includes a solid electrolytic capacitor element containing an anode body, a dielectric overlying the anode, and a solid electrolyte (e.g., conductive polymer) overlying the dielectric is provided. The anode body is in electrical contact with an anode termination and the solid electrolyte is in electrical contact with a cathode termination. The capacitor element and terminations are encapsulated within a resinous material so that at least a portion of the terminations remain exposed. In addition to enhancing mechanical robustness, the resinous encapsulating material acts in some capacity as a barrier to moisture and oxygen during use, which could otherwise reduce the conductivity of the solid electrolyte and increase ESR. To even further protect the capacitor element, especially at high temperatures, the encapsulated capacitor element is also enclosed and hermetically sealed within a ceramic housing in the presence of an inert gas.Type: GrantFiled: August 12, 2010Date of Patent: October 2, 2012Assignee: AVX CorporationInventor: Ivana Zednickova
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Patent number: 8273135Abstract: Provided is a method of manufacturing a solid electrolytic capacitor including a capacitor element, the capacitor element having an anode body with a dielectric coating film formed on a surface thereof and a solid electrolyte made of a conductive polymer. The method includes the steps of: forming the capacitor element having the anode body with the dielectric coating film formed on the surface thereof; preparing a polymerization liquid A containing one of a monomer as a precursor of the conductive polymer and an oxidant, and a silane compound; preparing a polymerization liquid B by adding the other of the monomer and the oxidant that is not contained in polymerization liquid A, to polymerization liquid A; and performing polymerization after impregnating the capacitor element with polymerization liquid B.Type: GrantFiled: October 6, 2009Date of Patent: September 25, 2012Assignees: SANYO Electric Co., Ltd., Saga Sanyo Industries Co., Ltd.Inventors: Takeshi Furukawa, Yuichiro Inutsuka
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Patent number: 8268019Abstract: A powder compaction press having opposed rib and channel punches which are interleaved and a production method are used to produce capacitor elements having a uniform compaction density and which are free of surface imperfections.Type: GrantFiled: June 24, 2008Date of Patent: September 18, 2012Assignee: Kemet Electronics CorporationInventor: Jeffrey P. Poltorak
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Publication number: 20120231346Abstract: The invention provides n electrochemical device containing a negative electrode having a negative electrode material layer at least on a surface; a positive electrode having a positive electrode material layer at least on a surface; and a solid polymer electrolyte of fine composite particles disposed between the negative electrode and the positive electrode. Each of the fine composite particles comprises a polymer brush layer of polymer graft chains. The fine composite particles form a substantially three-dimensional ordered array structure, and a continuous ion-conductive network channel is formed in each gap of the fine particles. The negative or positive electrode or electrode material layer have gaps filled with the fine composite particles.Type: ApplicationFiled: October 20, 2010Publication date: September 13, 2012Applicant: KYOTO UNIVERSITYInventors: Yoshinobu Tsujii, Kohji Ohno, Takeshi Fukuda, Takaya Sato, Takashi Morinaga
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Patent number: 8259436Abstract: An integrated capacitor assembly that contains at least two solid electrolytic capacitor elements electrically connected to common anode and cathode terminations is provided. The capacitor elements contain an anode, a dielectric coating overlying the anode that is formed by anodic oxidation, and a conductive polymer solid electrolyte overlying the dielectric layer. The capacitor elements are spaced apart from each other a certain distance such that a resinous material can fill the space between the elements. In this manner, the present inventors believe that the resinous material can limit the expansion of the conductive polymer layer to such an extent that it does not substantially delaminate from the capacitor element. In addition to possessing mechanical stability, the capacitor assembly also possesses a combination of good electrical properties, such as low ESR, high capacitance, and a high dielectric breakdown voltage.Type: GrantFiled: August 3, 2010Date of Patent: September 4, 2012Assignee: AVX CorporationInventors: Jan Petrzilek, Miloslav Uher, Lotfi Djebara
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Publication number: 20120219831Abstract: The present invention is directed to a hybrid device comprising: an energy converting unit comprising a first electrode, a second electrode and an energy converting medium arranged between the first electrode and the second electrode, wherein the energy conversion takes place between the first electrode and the second electrode; an energy charge storing unit comprising a first electrode, a second electrode and an electrolyte medium; wherein the energy charge is stored between the first and the second electrode; the second electrode of the energy converting unit and the second electrode of the energy charge storing unit being a shared electrode electrically connecting the energy converting unit and the energy charge storing unit; and wherein the shared electrode comprises a metal and a nanostructured material. The present invention is also directed to a method of manufacturing such a hybrid device.Type: ApplicationFiled: August 20, 2009Publication date: August 30, 2012Applicant: NANYANG TECHNOLOGICAL UNIVERSITYInventors: Wai Fatt Mak, Tsyh Ying Grace Wee, Teddy Salim, Madhavi Srinivasan, Subodh Mhaisalkar, Yin Chiang Freddy Boey
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Publication number: 20120218681Abstract: Provided are a solid electrolytic capacitor including an anode, a dielectric layer provided on a surface of the anode, a coupling agent layer provided on the dielectric layer, a conductive polymer layer provided on the coupling agent layer, and a cathode layer provided on the conductive polymer layer, wherein the coupling agent layer contains a first coupling agent having a phosphonic acid group and a second coupling agent which is a silane coupling agent, and a method for manufacturing the solid electrolytic capacitor.Type: ApplicationFiled: February 23, 2012Publication date: August 30, 2012Applicant: SANYO ELECTRIC CO., LTD.Inventors: Keiko KOSUGE, Taeko OTA, Takeshi SANO
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Publication number: 20120218682Abstract: A solid electrolytic capacitor including an anode, a dielectric layer formed on the anode, a polyvinyl alcohol film formed on the dielectric layer, and a conductive polymer layer formed on the polyvinyl alcohol film, wherein the polyvinyl alcohol film has a cross-linked structure.Type: ApplicationFiled: February 23, 2012Publication date: August 30, 2012Applicant: SANYO Electric Co., Ltd.Inventors: Keiichi KOMATSU, Koichi NISHIMURA, Fumio TATEZONO
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Patent number: 8254084Abstract: The present invention provides a chip type electric double layer capacitor including: a lower case having an internal space of which an upper surface is opened and an external terminal of which portions exposed to a bottom of the internal space and the outside are connected to each other; an electric double layer capacitor cell disposed in the internal space of the lower case to be electrically connected to the portion of the external terminal, which is exposed to the bottom of the internal space; and an upper cap mounted on the lower case to cover the internal space, and a method for manufacturing the same.Type: GrantFiled: December 18, 2009Date of Patent: August 28, 2012Assignee: Samsung Electro-Mechanics Co., Ltd.Inventors: Dong Sup Park, Ill Kyoo Park, Chang Ryul Jung, Sang Kyun Lee, Yeong Su Cho, Sung Ho Lee
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Patent number: 8241470Abstract: A method of anodizing that is performed in the capacitor case. The anode and a formation cathode are inserted into the capacitor case. The formation cathode includes one or more passageways through which formation electrolyte is transferred to contact the surface of the anode. In one particular implementation, the anode includes several slots and the formation cathodes are plates that are inserted into the slots. One or more valves coupled to formation electrolyte storage tanks storing different electrolytes may be coupled to the formation cathode. A rinsing step can be performed by supplying water through the passageways in the formation cathode. Other implementations anodize outside the capacitor case.Type: GrantFiled: June 28, 2006Date of Patent: August 14, 2012Assignee: Tantalum Pellet CompanyInventor: Todd Knowles
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Publication number: 20120200985Abstract: Electrode foil includes an aluminum alloy having a composition in a region at least 10 ?m deep from a surface of the foil. The composition includes aluminum as a main component and zirconium of at least 0.03 at % and at most 0.5 at %.Type: ApplicationFiled: October 19, 2010Publication date: August 9, 2012Inventors: Masashi Shoji, Hitoshi Ishimoto, Ayumi Kochi, Tomohiro Maruoka, Naomi Kurihara, Takao Sato
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Patent number: 8238079Abstract: A capacitor and a method for assembling a capacitor. A capacitor is assembled from a case, which contains an anode that is electrically coupled to the case and defines wells or slots receiving a plurality of cathode plates. A header is placed on the case. The header also supports a glass seal that insulates the lead tube and cathode lead coming from the cathode. Once assembled, the capacitor is filled with electrolyte. A weld extends around the header to secure the header to the case. A bent cathode configuration enables a plurality of cathode plates electrically coupled together from a common cathode plate.Type: GrantFiled: October 29, 2009Date of Patent: August 7, 2012Assignee: Tantalum Pellet CompanyInventor: Todd Knowles
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Patent number: 8228664Abstract: A solid electrolytic capacitor with suppressed occurrence of short circuit is provided. The solid electrolytic capacitor includes an anode body having a surface on which a dielectric film is formed, and a conductive polymer layer formed on the dielectric film. The conductive polymer layer includes at least a first conductive polymer layer formed on the dielectric film and a second conductive polymer layer formed on the first conductive polymer layer. A silane compound in the first conductive polymer layer and the silane compound in the second conductive polymer layer have respective concentrations different from each other.Type: GrantFiled: August 24, 2010Date of Patent: July 24, 2012Assignees: SANYO Electric Co., Ltd., Saga Sanyo Industries Co., Ltd.Inventors: Nobuyuki Yamaguchi, Koji Fukuchi, Yasuhiro Tsunezumi
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Publication number: 20120176731Abstract: A solid electrolytic capacitor includes a capacitor element, an anode terminal, and a cathode terminal. The capacitor element includes an anode body, and an anode member buried in the anode body. The anode member includes first and second anode components. At least a lower end portion of the first anode component is exposed at a lower surface of the anode body. The second anode component communicates with the first anode component and extends inside the anode body. The second anode component has a width greater than the width of the first anode component at least in a direction along the lower surface of the anode body. The anode terminal is electrically connected to the lower end portion of the first anode component. The cathode terminal is electrically connected to a cathode layer of the capacitor element at a position below the lower surface of the anode body.Type: ApplicationFiled: December 28, 2011Publication date: July 12, 2012Applicant: SANYO ELECTRIC CO., LTD.Inventor: Kazuyoshi Murata
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Patent number: 8218289Abstract: An electrolytic capacitor includes: a case including a case body, in which an electrolytic capacitor element is disposed in a sealed manner and filled up with an electrolytic solution, and a safety valve is mounted to the case body for jetting an evaporated gas of the electrolytic solution filling the electrolytic capacitor element; a cover member mounted to the case so as to cover the safety valve provided for the case; a first fixing unit mounted to the cover member so as to prevent the cover member from dismounting when the evaporated gas of the electrolytic solution is jetted outward; and a second fixing unit disposed in association with the first fixing unit and adopted to reinforce and assist a function of the first fixing unit to thereby prevent the cover member from being dismounted. An electric equipment includes a lighting circuit including circuit components, and an electrolytic capacitor of the structure mentioned above.Type: GrantFiled: January 27, 2010Date of Patent: July 10, 2012Assignee: Toshiba Lighting & Technology CorporationInventors: Isao Abe, Kenichi Asami, Hajime Osaki, Yoshiyuki Matsunaga, Hideo Kozuka
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Patent number: 8218290Abstract: Provided is a solid electrolytic capacitor with low ESR (equivalent series resistance) and excellent reliability during high-temperature storage. The solid electrolytic capacitor includes an anode formed of a valve metal, a dielectric film provided on the anode, a conducting polymer layer provided on the dielectric layer, and a cathode extraction layer provided on the conducting polymer layer. The conducting polymer layer contains a metal-based conductive filler in at least one of a flake form and a fiber form.Type: GrantFiled: August 20, 2008Date of Patent: July 10, 2012Assignee: Sanyo Electric Co., Ltd.Inventors: Taeko Ota, Masayuki Fujita, Takashi Umemoto, Hiroshi Nonoue
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Patent number: 8218291Abstract: A monomer and polycarbonate resin are provided, as are methods of making the monomer. The resin may be used to provide a thin film that has a higher dielectric constant and higher glass transition temperature, and similar breakdown strength and similar dissipation factor to films prepared from polycarbonate resins not so modified. The thin films, in turn, may advantageously be used to form, wholly or in part, articles such as capacitors, sensors, batteries, flexible printed circuit boards, keyboard membranes, motor/transformer insulations, cable wrappings, industrial tapes, interior coverage materials, and the like. In particular, a capacitor comprising the polycarbonate resin is also provided.Type: GrantFiled: March 31, 2010Date of Patent: July 10, 2012Assignee: General Electric CompanyInventors: Norberto Silvi, Gary Charles Davis, Patrick Joseph McCloskey, Sheldon Jay Shafer, Julia Lam Lee, Yang Cao, Patricia Chapman Irwin
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Patent number: 8218292Abstract: Solid electrolytic capacitors and related methods for forming such capacitors may variously involve forming at least one of a seed, grip, reference point and/or anode body by stencil printing of dry powder. In accordance with a method of forming anodic components for electrolytic capacitors, a stencil is positioned adjacent to a substrate, the stencil being formed to define a plurality of apertures therethrough. A plurality of printed powder portions are selectively printed on the substrate by placing dry powder into selected ones of the plurality of apertures defined in the stencil. The printed powder portions are then sintered to form respective anodic components for multiple respective electrolytic capacitors.Type: GrantFiled: July 31, 2009Date of Patent: July 10, 2012Assignee: AVX CorporationInventor: Majid Rezai-Kalantary
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Publication number: 20120170173Abstract: An electrode foil includes a substrate and a coarse film layer having a void therein and formed on the substrate. The coarse film layer includes at least a first coarse film layer formed on the substrate. The first coarse film layer is composed of arrayed first columnar bodies. Each of the first columnar bodies is composed of metallic microparticles stacked on a surface of the substrate and extending in a curve from the surface of the substrate.Type: ApplicationFiled: March 14, 2011Publication date: July 5, 2012Inventors: Akiyoshi Oshima, Hiroki Kamiguchi, Masashi Shoji, Hitoshi Ishimoto
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Publication number: 20120170171Abstract: An electrical component includes an inkjet-printed graphene electrode. Graphene oxide flakes are deposited on a substrate in a graphene oxide ink using an inkjet printer. The deposited graphene oxide is thermally reduced to graphene. The electrical properties of the electrode are comparable to those of electrodes made using activated carbon, carbon nanotubes or graphene made by other methods. The electrical properties of the graphene electrodes may be tailored by adding nanoparticles of other materials to the ink to serve as conductivity enhancers, spacers, or to confer pseudocapacitance. Inkjet-printing can be used to make graphene electrodes of a desired thickness in preselected patterns. Inkjet printing can be used to make highly-transparent graphene electrodes. Inkjet-printed graphene electrodes may be used to fabricate double-layer capacitors that store energy by nanoscale charge separation at the electrode-electrolyte interface (i.e., “supercapacitors”).Type: ApplicationFiled: November 21, 2011Publication date: July 5, 2012Inventors: Woo Young Lee, Linh Le, De Kong, Matthew Henderson Ervin, James L. Zunino, III, Brian E. Fuchs
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Patent number: 8213156Abstract: A coated electrode is provided for use in energy storage devices. The coated electrode comprises a dry fibrillized polymer that is fibrillized with no processing additives.Type: GrantFiled: November 17, 2009Date of Patent: July 3, 2012Assignee: Maxwell Technologies, Inc.Inventors: Porter Mitchell, Linda Zhong, Hermann Vincent, Chenniah Nanjundiah
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Patent number: 8213158Abstract: Provided is a solid electrolytic capacitor comprising an anode of a porous body formed of a valve metal or its alloy, a dielectric layer formed on the surface in the inside part of the porous body and on the surface in the outer peripheral part thereof, a conductive polymer layer formed on the dielectric layer, a cathode layer formed on the conductive polymer layer in the outer peripheral part of the porous body, and an anode lead of which one end is embedded inside the anode, wherein the conductive polymer layer in the first region which is in the inside part of the porous body and the periphery around the anode lead as the center is formed of a polypyrrole layer, and the conductive polymer layer in the second region which is the periphery around the first region is formed by laminating a polypyrrole layer on a polyethylenedioxythiophene layer.Type: GrantFiled: September 25, 2008Date of Patent: July 3, 2012Assignee: Sanyo Electric Co., Ltd.Inventors: Kazuhiro Takatani, Mutsumi Yano, Takashi Umemoto, Hiroshi Nonoue
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Patent number: 8213159Abstract: An electrode foil includes a structure a structure in which metal particles and ceramic particles, which primarily include at least one of valve metal particles having a dielectric constant and ceramic particles, are deposited on a surface of a metal foil.Type: GrantFiled: October 16, 2009Date of Patent: July 3, 2012Assignee: Fujitsu LimitedInventors: Yoshihiko Imanaka, Minoru Funahashi, Hidetoshi Ishizuka, Katsuharu Yamada
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Patent number: 8213160Abstract: A solid electrolytic capacitor including a solid electrolytic capacitor component comprises a porous anode body 2 composed of valve metal having a anode lead 1 protruding therefrom, a anode oxide film, a solid electrolyte layer 4, a graphite layer 5, a silver paste layer 6, a resist layer 3 separating the anode lead 1 used as a anode portion and the porous anode body 2 used as a cathode portion, and a anode lead element 7 connected to the anode lead 1, the anode oxide film, solid electrolyte layer 4, graphite layer 5, silver paste layer 6 being successively formed on the surface of the porous anode body 2, wherein the solid electrolytic capacitor component is bonded on a mounting substrate 21 having a anode terminal 21a, a cathode terminal 21b, and an insulating portion 21c therebetween with a precuring insulating adhesive 9 formed on the insulating portion 21c of the mounting substrate 21 and precuring conductive adhesives 8 formed on the anode terminal and cathode terminal, and sealed with exterior resin 10Type: GrantFiled: March 13, 2008Date of Patent: July 3, 2012Assignee: NEC Tokin CorporationInventors: Takeshi Saito, Yuji Yoshida, Takeo Kasuga, Koji Sakata, Katsuhiro Yoshida, Masanori Takahashi
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Patent number: 8208242Abstract: An electrode foil includes a substrate made of metal and a rough layer disposed on a surface of the substrate and including plural fine metallic particles. The rough layer includes a lower layer, an intermediate layer which is disposed on the lower layer and is more distanced from the substrate than the lower layer is, and an upper layer which is disposed on the intermediate layer and is more distanced from the substrate than the intermediate layer is. The mode of diameters of fine particles in the intermediate layer is greater than the mode of diameters of the fine particles in the upper and lower layers. This electrode foil provides a capacitor having a small leakage current.Type: GrantFiled: October 5, 2010Date of Patent: June 26, 2012Assignee: Panasonic CorporationInventors: Hiroki Kamiguchi, Akiyoshi Oshima
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Publication number: 20120154985Abstract: There is provided a high performance solid electrolytic capacitor that can be manufactured stably. The present invention provides the solid electrolytic capacitor comprising an anode foil and a cathode foil, and a separator arranged between the anode foil and the cathode foil, wherein the anode foil, the cathode foil, and the separator are wound around, so that the separator is intervened between the anode foil and the cathode foil, the anode foil has a dielectric oxide film layer, the separator comprises a solid electrolyte and a nonwoven fabric holding the solid electrolyte, the nonwoven fabric composing the separator is a laminated nonwoven fabric having at least two layers of the nonwoven fabric layers, and the laminated nonwoven fabric comprises a nonwoven fabric layer (layer I) composed of ultra fine fiber having a fiber diameter of 0.1 to 4 ?m, and a nonwoven fabric layer (layer II) composed of a thermoplastic resin fiber having a fiber diameter of 6 to 30 ?m.Type: ApplicationFiled: August 19, 2010Publication date: June 21, 2012Inventors: Kazufumi Kato, Rumina Obi, Ikuo Ueno
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Publication number: 20120156572Abstract: Disclosed are an electrode active material for a power storage device and a power storage device including the same. The electrode active material includes a polymer that includes: a tetravalent group derived from a compound selected from the group consisting of EBDT and derivatives thereof, TTF and derivatives thereof, a condensation product of EBDT and TTF and derivatives thereof, and a TTF dimer and derivatives thereof; and a divalent group —S-A-S— where A is a divalent aliphatic group or a divalent group represented by the formula -E-D-E- where D represents a divalent alicyclic group, a divalent aromatic group, or a carbonyl group, and two Es each independently represent a divalent aliphatic group. Adjacent two tetravalent groups mentioned above are linked by one or two divalent groups mentioned above.Type: ApplicationFiled: February 15, 2011Publication date: June 21, 2012Inventors: Nobuhiko Hojo, Yu Ohtsuka, Takafumi Tsukagoshi, Yohji Misaki
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Patent number: 8203827Abstract: A solid electrolytic capacitor that comprises an anode, a dielectric layer overlying the anode; and a cathode that contains a solid electrolyte layer overlying the dielectric layer. The anode comprises a porous, sintered body that defines a surface. The body is treated so that the surface contains a non-metallic element having a ground state electron configuration that includes five or more valence electrons at an energy level of three or more (e.g., phosphorous).Type: GrantFiled: February 20, 2009Date of Patent: June 19, 2012Assignee: AVX CorporationInventor: Tomas Karnik
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Publication number: 20120147527Abstract: A solid electrolytic capacitor includes a capacitor element, an anode terminal, and a cathode terminal. The capacitor element includes an anode body, an anode member buried in the anode body, a dielectric layer formed on part of a surface of the anode body, an electrolyte layer formed on the dielectric layer, and a cathode layer formed on the electrolyte layer. The anode member extends in a predetermined direction along a lower surface of the anode body, and has a lower end portion exposed at the lower surface of the anode body. The anode terminal is electrically connected to the lower end portion. The cathode terminal is electrically connected to the cathode layer at a position below the lower surface of the anode body. The anode and cathode terminals are spaced apart from each other in a direction substantially perpendicular to a direction in which the anode member extends.Type: ApplicationFiled: December 5, 2011Publication date: June 14, 2012Applicant: SANYO ELECTRIC CO., LTD.Inventor: Kazuyoshi Murata
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Publication number: 20120147528Abstract: A dispersion that contains an intrinsically conductive polythiophene formed via poly(ionic liquid)-mediated polymerization is provided. Without intending to be limited by theory, it is believed that a thiophene monomer can polymerize along the chains of a poly(ionic liquid). In this manner, the poly(ionic liquid) may act as a template for polymerization to provide a particle dispersion that is substantially homogeneous and stable. Such dispersions may be employed in an electrolytic capacitor as a solid electrolyte and/or as a conductive coating that is electrical communication with the electrolyte. Regardless, the dispersion may be more easily and cost effectively formed and incorporated into the structure of the capacitor. Moreover, due to the presence of the ionic liquid, the dispersion is conductive and does not require the addition of conventional dopants, such as polystyrene sulfonic acid.Type: ApplicationFiled: December 14, 2010Publication date: June 14, 2012Applicant: AVX CORPORATIONInventors: Martin Biler, Lubomir Kubac, Jiri Akrman
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Publication number: 20120147529Abstract: A solid electrolytic capacitor a solid electrolytic capacitor that includes an anode body, a dielectric overlying the anode body, and a solid electrolyte overlying the dielectric is provided. The capacitor also comprises a conductive polymer coating that overlies the solid electrolyte and includes nanoparticles formed from a poly(3,4-ethylenedioxythiophene) quaternary onium salt.Type: ApplicationFiled: December 14, 2010Publication date: June 14, 2012Applicant: AVX CORPORATIONInventors: Martin Biler, Lubomir Kubac, Radana Becvarikova
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Publication number: 20120147526Abstract: A solid electrolytic capacitor includes a capacitor element, an outer package member covering the capacitor element, an anode terminal, and a cathode terminal. The capacitor element includes an anode body, an anode member buried in the anode body, a dielectric layer formed on part of a surface of the anode body, an electrolyte layer formed on the dielectric layer, and a cathode layer formed on the electrolyte layer. The anode member has a lower end portion exposed at a lower surface of the anode body. The anode terminal is electrically connected to the lower end portion, and has a surface partially exposed at a lower surface of the outer package member. The cathode terminal is electrically connected to the cathode layer at a position below the lower surface of the anode body, and has a surface partially exposed at the lower surface of the outer package member.Type: ApplicationFiled: December 5, 2011Publication date: June 14, 2012Applicant: SANYO ELECTRIC CO., LTD.Inventor: Kazuyoshi Murata
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Publication number: 20120148921Abstract: Disclosed are an electrode for a low-resistance energy storage device, a method of manufacturing the same, and an energy storage device using the same. In detail, the electrode for an energy storage device is manufactured by forming electrode materials on a metal layer having a dendrite formed thereon. The energy storage device using the electrode for an energy storage device has low resistance characteristics.Type: ApplicationFiled: May 20, 2011Publication date: June 14, 2012Inventors: Sang Kyun Lee, Bae Kyun Kim, Ji Sung Cho
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Patent number: 8199462Abstract: An electrolytic capacitor that is configured to be embedded into a circuit board is provided. The electrolytic capacitor contains a capacitor element, anode and cathode terminations, and a case that encapsulates the capacitor element and leaves at least a portion of the anode and cathode terminations exposed that extend outwardly from opposite ends of the case. Each of the terminations possesses an upper surface that faces toward the capacitor element and a lower surface that faces away from the capacitor element. In contrast to conventional surface-mounted electrolytic capacitors, the upper surfaces of these exposed anode and cathode termination portions are mounted to the circuit board. In this manner, the capacitor may essentially be mounted “upside down” so that some or all of its thickness becomes embedded within the board itself, thereby minimizing the height profile of the capacitor on the board.Type: GrantFiled: September 8, 2008Date of Patent: June 12, 2012Assignee: AVX CorporationInventors: Stanislav Zednicek, Ladislav Marek
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Patent number: 8199460Abstract: A capacitor containing a solid electrolytic capacitor element that includes an anode, dielectric, and solid electrolyte is provided. An anode lead extends from the anode and is electrically connected to an anode termination. The anode termination contains an upstanding portion that is bent or folded about an axis so that it possesses two or more sections. A slot (e.g., U-shaped) extends through the sections of the upstanding portion for receiving an anode lead. The resulting “folded” configuration of the anode termination increases the total thickness of the upstanding portion and its associated slot, which thereby enhances the degree of mechanical support and stability that the termination provides to the anode lead. This is particularly beneficial for thicker anode leads, such as those having a height and/or width of about 100 micrometers or more, in some embodiments about 200 micrometers or more, and in some embodiments, from about 250 to about 1000 micrometers.Type: GrantFiled: September 27, 2010Date of Patent: June 12, 2012Assignee: AVX CorporationInventor: Ales Vyroubal
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Patent number: 8194395Abstract: A capacitor assembly that includes an electrolytic capacitor that contains an anode body, dielectric overlying the anode, and a solid electrolyte overlying the dielectric is provided. An anode lead is also electrically connected to the anode body and extends in a longitudinal direction therefrom. The anode lead is connected to an “upstanding” portion of a leadframe. Among other things, this helps to limit substantial horizontal movement of the lead and thereby improve the mechanical robustness of the part. The capacitor and leadframe are enclosed and hermetically sealed within a ceramic housing in the presence of an inert gas. It is believed that the ceramic housing is capable of limiting the amount of oxygen and moisture supplied to the conductive polymer of the capacitor. In this manner, the solid electrolyte (e.g., conductive polymer) is less likely to undergo a reaction in high temperature environments, thus increasing the thermal stability of the capacitor assembly.Type: GrantFiled: October 8, 2009Date of Patent: June 5, 2012Assignee: AVX CorporationInventors: Stanislav Zednicek, Ladislav Vilc, Martin Biler
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Patent number: 8187567Abstract: Disclosed is a niobium suboxide powder for the manufacture of capacitors with higher break down voltages, higher temperatures of operation and elongated lifetimes. The powder is doped with nitrogen which is at least partly present in the form homogeneously distributed, x-ray detectable Nb2N-crystal domains. The niobium suboxide powder contains niobium suboxide particles having a bulk nitrogen content of between 500 to 20,000 ppm.Type: GrantFiled: May 31, 2006Date of Patent: May 29, 2012Assignee: H. C. Starck GmbHInventors: Christoph Schnitter, Holger Brumm, Christine Rawohl, Colin McCracken
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Patent number: 8189322Abstract: The solid electrolytic capacitor according to the present invention comprises a capacitor element including an anode section, a cathode section, and a dielectric oxide film provided between the anode section and the cathode section. The solid electrolytic capacitor further comprises an anode lead frame connected to the anode section, a cathode lead frame connected to the cathode section, and an exterior resin covering the capacitor element and a part of the anode lead frame and cathode lead frame respectively. The anode section comprises an anode body including a sintered body of a valve action metal, and an average particle diameter of particles of the valve action metal of the anode body is 0.43 ?m or smaller.Type: GrantFiled: September 21, 2009Date of Patent: May 29, 2012Assignee: SANYO Electric Co., Ltd.Inventors: Kenichiro Matsuzaki, Taro Matsuo, Kiyotaka Ito