Aluminum Or Tantalum Patents (Class 361/529)
  • Publication number: 20120229955
    Abstract: A solid electrolytic capacitor that includes an anode body, a dielectric overlying the anode body, a solid electrolyte overlying the dielectric, and a colloidal particle coating that overlies the solid electrolyte. The coating is formed from a colloidal particle dispersion. The particles of the dispersion contain at least two different polymer components—i.e., a conductive polymer and a latex polymer. One benefit of such a coating is that the presence of the latex polymer can help mechanically stabilize the capacitor during encapsulation due to its relatively soft nature. This helps limit delamination of the solid electrolyte and any other damage that may otherwise occur during formation of the capacitor. Furthermore, the latex polymer can also enhance the ability of the particles to be dispersed in an aqueous medium, which is desirable in various applications.
    Type: Application
    Filed: March 11, 2011
    Publication date: September 13, 2012
    Applicant: AVX CORPORATION
    Inventor: Martin Biler
  • Patent number: 8257463
    Abstract: A capacitor anode that is formed from flake powder is provided. The anodes are formed from low density flake powder (e.g., relatively large in size), which is believed to provide a short transmission line between the outer surface and interior of the anode. This may result in a low equivalent series resistance (“ESR”) and improved volumetric efficiency for capacitors made from such anodes.
    Type: Grant
    Filed: January 23, 2006
    Date of Patent: September 4, 2012
    Assignee: AVX Corporation
    Inventors: James Allen Fife, Zebbie Lynn Sebald
  • Patent number: 8259436
    Abstract: 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: Grant
    Filed: August 3, 2010
    Date of Patent: September 4, 2012
    Assignee: AVX Corporation
    Inventors: Jan Petrzilek, Miloslav Uher, Lotfi Djebara
  • Publication number: 20120206859
    Abstract: A process for preparing a solid electrolytic capacitor comprising application of coverage enhancing catalyst followed by application of a conducting polymer layer. Coverage enhancing catalyst is removed after coating and curing.
    Type: Application
    Filed: February 15, 2012
    Publication date: August 16, 2012
    Inventors: Antony P. Chacko, Qingping Chen, Jin Yang, Phillip M. Lessner, Randolph S. Hahn, Yongjian Qiu, Keith R. Brenneman
  • Patent number: 8238079
    Abstract: 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: Grant
    Filed: October 29, 2009
    Date of Patent: August 7, 2012
    Assignee: Tantalum Pellet Company
    Inventor: Todd Knowles
  • Patent number: 8238078
    Abstract: The present invention relates to valve metal particles uniformly containing nitrogen and a method for preparing the same, and a valve metal green pellet and a sintered pellet made from the particles, and an electrolytic capacitor anode. The present invention provides valve metal particles uniformly containing nitrogen, wherein the difference ratio of nitrogen contents of particles is 20% or less. The present invention provides a process for preparing said valve metal particles uniformly containing nitrogen, wherein the raw material particles of the valve metal were heated in a nitrogen-containing gas at a temperature of 200° C. or less for 2 hours or more. The present invention also provides a valve metal green pellet made from said valve metal particles. The present invention also provides a valve metal sintered pellet.
    Type: Grant
    Filed: October 14, 2008
    Date of Patent: August 7, 2012
    Assignee: Ningxia Orient Tantalum Industry Co., Ltd.
    Inventors: Bin Li, Luntao Pan, Aiguo Zheng, Yuezhong Ma, Yuewei Cheng, Xuecheng Dong, Xueqing Zhang, Zhidao Wang, Baojun Zhu
  • Patent number: 8228664
    Abstract: 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: Grant
    Filed: August 24, 2010
    Date of Patent: July 24, 2012
    Assignees: SANYO Electric Co., Ltd., Saga Sanyo Industries Co., Ltd.
    Inventors: Nobuyuki Yamaguchi, Koji Fukuchi, Yasuhiro Tsunezumi
  • Patent number: 8218292
    Abstract: 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: Grant
    Filed: July 31, 2009
    Date of Patent: July 10, 2012
    Assignee: AVX Corporation
    Inventor: Majid Rezai-Kalantary
  • Patent number: 8218291
    Abstract: 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: Grant
    Filed: March 31, 2010
    Date of Patent: July 10, 2012
    Assignee: General Electric Company
    Inventors: Norberto Silvi, Gary Charles Davis, Patrick Joseph McCloskey, Sheldon Jay Shafer, Julia Lam Lee, Yang Cao, Patricia Chapman Irwin
  • Patent number: 8213159
    Abstract: 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: Grant
    Filed: October 16, 2009
    Date of Patent: July 3, 2012
    Assignee: Fujitsu Limited
    Inventors: Yoshihiko Imanaka, Minoru Funahashi, Hidetoshi Ishizuka, Katsuharu Yamada
  • Patent number: 8208242
    Abstract: 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: Grant
    Filed: October 5, 2010
    Date of Patent: June 26, 2012
    Assignee: Panasonic Corporation
    Inventors: Hiroki Kamiguchi, Akiyoshi Oshima
  • Patent number: 8203827
    Abstract: 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: Grant
    Filed: February 20, 2009
    Date of Patent: June 19, 2012
    Assignee: AVX Corporation
    Inventor: Tomas Karnik
  • Publication number: 20120147528
    Abstract: 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: Application
    Filed: December 14, 2010
    Publication date: June 14, 2012
    Applicant: AVX CORPORATION
    Inventors: Martin Biler, Lubomir Kubac, Jiri Akrman
  • Patent number: 8199460
    Abstract: 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: Grant
    Filed: September 27, 2010
    Date of Patent: June 12, 2012
    Assignee: AVX Corporation
    Inventor: Ales Vyroubal
  • Patent number: 8194395
    Abstract: 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: Grant
    Filed: October 8, 2009
    Date of Patent: June 5, 2012
    Assignee: AVX Corporation
    Inventors: Stanislav Zednicek, Ladislav Vilc, Martin Biler
  • Patent number: 8187567
    Abstract: 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: Grant
    Filed: May 31, 2006
    Date of Patent: May 29, 2012
    Assignee: H. C. Starck GmbH
    Inventors: Christoph Schnitter, Holger Brumm, Christine Rawohl, Colin McCracken
  • Patent number: 8179664
    Abstract: A solid electrolytic capacitor comprises an insulating substrate in which an anode terminal and a cathode terminal are formed. A first anode section and a first cathode section are formed on a first surface of the insulating substrate, so as to be spaced from each other in a first predetermined direction. A second anode section and a second cathode section are formed on a second surface of the insulating substrate, so as to be spaced from each other in a second direction generally perpendicular to the first direction. The anode terminal comprises the first and second anode sections, which are electrically connected to each other. The cathode terminal comprises the first and second cathode sections, which are electrically connected to each other. A capacitor element is arranged on the first surface of the insulating substrate with an anode section thereof being oriented in the first direction.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: May 15, 2012
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Yasuko Ibata, Hiroya Nishimoto, Takeshi Takamatsu
  • Publication number: 20120113567
    Abstract: A capacitor assembly that includes a conductive polymer electrolytic capacitor that is enclosed and hermetically sealed within a ceramic housing in the presence of an inert gas is provided. Without intending to be limited by theory, the present inventors believe 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 conductive polymer is less likely to oxidize in high temperature environments, thus increasing the thermal stability of the capacitor assembly.
    Type: Application
    Filed: January 9, 2012
    Publication date: May 10, 2012
    Applicant: AVX CORPORATION
    Inventors: Bharat Rawal, Gang Ning, Brady Jones, Zebbie Lynn Sebald, Stanislav Zednicek, Zdenek Sita
  • Patent number: 8174819
    Abstract: A solid electrolytic capacitor comprises an insulating substrate in which an anode terminal and a cathode terminal are formed. The anode terminal comprises a first anode section formed on a first surface of the insulating substrate, and a second anode section formed on a second surface of the insulating substrate, which are electrically connected to each other. A connection part is formed integrally with the first anode section. The cathode terminal comprises a first cathode section formed on the first surface and a second cathode section formed on the second surface, which are electrically connected to each other. A distance between the first anode section and the first cathode section is smaller than a distance between the second anode section and the second cathode section. And an anode section and a cathode section of a capacitor element are electrically connected to the connection part and the first cathode section respectively.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: May 8, 2012
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Yasuko Ibata, Hiroya Nishimoto, Takeshi Takamatsu
  • Publication number: 20120081840
    Abstract: A method for producing agglomerated tantalum particles, comprising: a step for grinding secondary tantalum particles, which are obtained by reducing a tantalum salt, and adding water thereto to give a water-containing mass; a step for drying said water-containing mass to give a dry mass; a step for sieving said dry mass to give spherical particles; and a step for heating said spherical particles. A mixed tantalum powder comprising a mixture of agglomerated tantalum particles (X) with agglomerated tantalum particles (Y), wherein said agglomerated tantalum particles (X) show a cumulative percentage of particles with particle size of 3 ?m or less of 5 mass % or less after 25 W ultrasonic radiation for 10 min, while said agglomerated tantalum particles (Y) show a cumulative percentage of particles with particle size of 3 ?m or less of 10 mass % or more after 25 W ultrasonic radiation for 10 min.
    Type: Application
    Filed: November 11, 2011
    Publication date: April 5, 2012
    Applicant: CABOT CORPORATION
    Inventors: Ryosuke Matsuoka, Eiji Kataoka, Yoshikazu Noguchi, John Koenitzer, Sridhar Venigalla
  • Publication number: 20120075775
    Abstract: 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: Application
    Filed: September 27, 2010
    Publication date: March 29, 2012
    Applicant: AVX CORPORATION
    Inventor: Ales Vyroubal
  • Patent number: 8139344
    Abstract: A solid electrolytic capacitor has a capacitor body formed from a pressed anode, a dielectric layer and a solid electrolyte layer. An anode lead extends from anode pellet and is electrically connected to an anode termination. The outer surface of the capacitor body forms a cathode that is electrically connected to a cathode termination. Base anode and cathode termination portions are coplanar and connected with a recessed leadframe channel. A capacitor element is attached to the anode and cathode termination portions and encapsulated. The recessed leadframe channel is removed to isolate the anode and cathode terminations on a single mounting surface, leaving a surface groove formed between the anode and cathode terminations.
    Type: Grant
    Filed: September 10, 2009
    Date of Patent: March 20, 2012
    Assignee: AVX Corporation
    Inventors: Jiri Navratil, Jaroslav Tomasko, Stanislav Zednicek
  • Patent number: 8125767
    Abstract: A coated electrode includes a current collector of an etched aluminum foil having a thickness of 20 to 45 ?m, an apparent density of 2.00 to 2.54 g/cm3, an air permeability of 20 to 120 s and a number of through-holes penetrating therethrough from the front surface to the back surface, and an electrode layer formed by applying a coating material including, as an active material, a substance capable of reversibly carrying lithium ions and anions on to the current collector. The coated electrode is industrially producible, high in conductivity and strength, and excellent in evenness. A capacitor, for example, can make use of the electrode.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: February 28, 2012
    Assignee: JM Energy Corporation
    Inventors: Chisato Marumo, Kenichi Matsumoto, Yuka Toyomasu, Makoto Ohshima
  • Patent number: 8120893
    Abstract: A compound having the formula below. X is hydroxyl, a sulfonic ester or salt thereof, a phosphonate or salt thereof, a carboxylate or salt thereof, or a boronic ester or salt thereof. The value n is an integer greater than or equal to 2. A polymer made by polymerizing the compound. A method of: reacting NH2—(CH2—CH2—O)n—CH2—CH2—OH with thiophene acid chloride to form a (SC4H3)—CO—NH—(CH2—CH2—O)n—CH2—CH2—OH amide; reacting the amide with a vinyl sulfonic ester, a vinyl phosphonate, a vinyl carboxylate, or a vinyl boronic ester to form an intermediate; and converting the intermediate to a salt form.
    Type: Grant
    Filed: September 22, 2009
    Date of Patent: February 21, 2012
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Brett D Martin, Banahalli R Ratna, Jawad Naciri, Michael A Markowitz
  • Publication number: 20120039019
    Abstract: 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: Application
    Filed: August 12, 2010
    Publication date: February 16, 2012
    Applicant: AVX CORPORATION
    Inventor: Ivana Zednickova
  • Publication number: 20120033350
    Abstract: A process for producing a solid electrolyte capacitor with an anode comprising a sintered fine NbOx powder, where 0.5<x<1.7, includes providing a green anode body. The green anode body is sintered so as to provide a sintered anode body. The sintered anode body is formed so as to provide a formed anode body, wherein the forming is essentially performed without applying a pressure. The formed anode body is provided with a cathode so as to provide the solid electrolyte capacitor.
    Type: Application
    Filed: December 7, 2009
    Publication date: February 9, 2012
    Applicant: H. C. STARCK GMBH
    Inventors: Ralph Otterstedt, Marianne Gottschling
  • Patent number: 8081421
    Abstract: A solid electrolytic capacitor includes a capacitor element, an anode lead frame, a cathode lead frame, and a mold resin portion. The anode lead frame includes an anode terminal portion and a rising portion, and the anode terminal portion is exposed at the bottom surface of the mold resin portion. The rising portion is formed integral with the anode terminal portion, and rises to the anode portion. In the rising portion, a through hole is formed. The cathode lead frame includes a cathode terminal portion, a pair of side surface portions and a step portion. Thus, a solid electrolytic capacitor allowing highly accurate and reliable attachment of the capacitor element to the lead frame without using any additional member is provided.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: December 20, 2011
    Assignee: SANYO Electric Co., Ltd.
    Inventors: Keiko Matsuoka, Shoji Umeda, Yoshiyuki Fushimi, Koji Tezuka
  • Patent number: 8081418
    Abstract: Double-layer capacitors capable of operating at extremely low temperatures (e.g., as low as ?75° C.) are disclosed. Electrolyte solutions combining a base solvent (e.g., acetonitrile) and a cosolvent are employed to lower the melting point of the base electrolyte. Example cosolvents include methyl formate, ethyl acetate, methyl acetate, propionitrile, butyronitrile, and 1,3-dioxolane. An optimized concentration (e.g., 0.10 M to 0.75 M) of salt, such as tetraethylammonium tetrafluoroborate, is dissolved into the electrolyte solution. In some cases (e.g., 1,3-dioxolane cosolvent) additives, such as 2% by volume triethylamine, may be included in the solvent mixture to prevent polymerization of the solution. Conventional device form factors and structural elements (e.g., porous carbon electrodes and a polyethylene separator) may be employed.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: December 20, 2011
    Assignee: California Institute of Technology
    Inventors: Erik J. Brandon, Marshall C. Smart, William C. West
  • Patent number: 8081417
    Abstract: An electrolytic capacitor is provided having an airtight casing, electrodes immersed in an electrolytic solution, electrical contacts connected to the electrodes, and a means (10, 43) for sorption of harmful substances. The means for sorption of harmful substances includes a polymeric housing (11, 12) permeable to the harmful substances but impermeable to the electrolytic solution and contain one or more getter materials (14, 45) for sorption of the harmful substances.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: December 20, 2011
    Assignee: Saes Getters S.p.A.
    Inventors: Luca Toia, Marco Amiotti
  • Patent number: 8066783
    Abstract: A solid electrolytic capacitor of the present invention includes an anode element made of a sintered body of a valve-action metal; a dielectric coating, a solid electrolyte layer, and a cathode lead layer, sequentially formed on a surface of the anode element; and an anode lead member made of a conductive metal projecting from the anode element, the anode lead member having a base end thereof embedded in the anode element, the base end being formed such that a cross section thereof perpendicular to a direction extending inwardly of the anode element has a contour with four rounded rectangular corners.
    Type: Grant
    Filed: January 31, 2006
    Date of Patent: November 29, 2011
    Assignee: SANYO Electric Co., Ltd.
    Inventor: Yasushi Takeda
  • Patent number: 8068327
    Abstract: A holding device for encased capacitors used for electric drive engineering. The inventive holding device comprises integrateable and separable lower and top holding parts. Axially protruded retaining clamps are arranged on the top holding part around each encased capacitor. The lower holding part comprises an opening for the respective capacitor and each opening is surrounded with a sealing lip. The retaining clamps are pressed against the capacitors by the internal surface of the lower holding part. Sections protruded from the respective openings of the lower holding part are embodied in the form of the capacitor sections freely extending directly to a cold air flow of a device. The sealing lip is sealingly placed on the external wall of each encased capacitor in such a way that the penetration of solid or liquid materials inside the lower holding part is prohibited, thereby preventing a high IP protection degree.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: November 29, 2011
    Assignee: Lenze Drives GmbH
    Inventors: Josef Seifert, Rudi Hueskes, Matthias Rohde, Alex Itten
  • Patent number: 8054611
    Abstract: A porous metal thin film formed from aluminum has a film structure in which domains having an average diameter of 200 nm or more, and 500 nm or less and being formed through aggregation of a plurality of grains having an average grain diameter of 50 nm or more, and 160 nm or less are distributed discretely at an average distance of 5 nm or more, and 40 nm or less, wherein the area occupied by the above-described domains is 60% or more, and 90% or less in a cross-section in any direction of the porous metal thin film.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: November 8, 2011
    Assignee: Kobe Steel, Ltd.
    Inventor: Masao Mizuno
  • Patent number: 8050014
    Abstract: A solid electrolytic capacitor having a solid electrolyte layer, comprising: the solid electrolyte layer having an electrically-conductive polymer hybrid layer containing an electrolytically-polymerized electrically-conductive polymer and a chemically-polymerized electrically-conductive polymer.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: November 1, 2011
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Tetsuro Iwasa, Hiroshi Nakajima, Seiji Omura
  • Patent number: 8050015
    Abstract: A composite electric element includes a solid electrolytic capacitor and an electric element disposed on the solid electrolytic capacitor. A conductive plate, which is less resistive than an internal conductive layer, is connected to and covers the composite electric element. A current from a power source and its return current from an electric load flow across the internal conductive layer of the composite electric element in opposite directions. The composite electric element is disposed on a surface of a module substrate, and a slit is provided on the ground so that more current flows inside the electric element in opposite directions.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: November 1, 2011
    Assignee: SANYO Electric Co., Ltd.
    Inventor: Kazuya Niki
  • Patent number: 8040661
    Abstract: A method for manufacturing a solid electrolytic capacitor device is disclosed. The solid electrolytic capacitor device comprises a package substrate and a capacitor element which is mounted on the package substrate. The package substrate comprises an outer anode electrode, an outer cathode electrode, an inner anode electrode and an inner cathode electrode. The outer anode electrode is electrically connected to the inner anode electrode. The outer cathode electrode is electrically connected to the inner cathode electrode. The capacitor element comprises a capacitor body and an anode lead portion which extends from the capacitor body. The capacitor body has a surface at least one part of which is provided with a cathode portion. The method comprises: forming the anode lead portion; forming the cathode portion after the formation of the anode lead portion; and connecting the anode lead portion and the cathode portion to the inner anode electrode and the inner cathode electrode, respectively.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: October 18, 2011
    Assignee: NEC Tokin Corporation
    Inventors: Shinya Tokashiki, Katsuhiro Yoshida, Masanori Takahashi
  • Patent number: 8035952
    Abstract: A conductive composition comprises a ? conjugated conductive polymer, a polyanion, and a hydroxy group-containing aromatic compound containing two or more hydroxy groups. An antistatic coating material comprises the conductive composition and a solvent. An antistatic coating is produced by applying the antistatic coating material. A capacitor comprises an anode composed of a porous valve metal body; a dielectric layer formed by oxidizing a surface of the anode; and a cathode formed on the dielectric layer, wherein the cathode has a solid electrolyte layer comprising the conductive composition.
    Type: Grant
    Filed: October 21, 2010
    Date of Patent: October 11, 2011
    Assignee: Shin-Etsu Polymer Co., Ltd.
    Inventors: Kazuyoshi Yoshida, Tailu Ning, Yasushi Masahiro, Rika Abe, Yutaka Higuchi
  • Publication number: 20110242734
    Abstract: Provided is a high-voltage solid electrolytic capacitor having a rated voltage of several hundreds of volts. After an anodic oxide film layer is formed on a roughened surface of an aluminum foil by way of a first conversion treatment, a hydrated film is formed by way of boiling water immersion; the hydrated film is provided with a second conversion treatment at a formation voltage lower than that of the first conversion treatment such that an anodic foil is formed; and a conductive polymeric layer is formed on a surface of the anodic foil.
    Type: Application
    Filed: March 31, 2010
    Publication date: October 6, 2011
    Applicant: NIPPON CHEMI-CON CORPORATION
    Inventors: Lawrence A. Dominey, Alex D. Smith
  • Patent number: 8029762
    Abstract: Porous anode bodies suitable for use in solid state capacitors, the porous anode bodies prepared by processes which include providing a niobium suboxide powder comprising niobium suboxide particles having a bulk nitrogen content of 500 to 20,000 ppm, and agglomerating and coalescing the powder; and capacitors incorporating such anode bodies.
    Type: Grant
    Filed: June 1, 2006
    Date of Patent: October 4, 2011
    Assignee: H. C. Starck GmbH
    Inventors: Christoph Schnitter, Holger Brumm, Christine Rawohl, Colin McCracken
  • Patent number: 8027150
    Abstract: A solid electrolytic capacitor having an electrolytic layer containing at least two types of ionic liquids and a conductive polymer is provided. Preferably, the ionic liquids include at least one type of ionic liquid for supplying an excellent impedance characteristic and at least one type of ionic liquid for supplying an excellent withstand voltage characteristic. Thus, a solid electrolytic capacitor exhibiting a high withstand voltage and an excellent impedance characteristic can be obtained.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: September 27, 2011
    Assignee: Kaneka Corporation
    Inventors: Hideo Yamagishi, Kazuyuki Tateishi, Hiroyuki Furutani, Mutsuaki Murakami
  • Patent number: 8018713
    Abstract: Anodized films are formed at both surfaces of an aluminum base and, at the center portion on each side of the aluminum base, a solid electrolyte layer of a conductive polymer, a graphite layer, and a metal layer are stacked in the order, thereby forming a rectangular cathode portion. An insulator layer is formed at the peripheries of four sides of the cathode portion and, further, an anode lead frame is provided at the peripheries of four sides of the upper insulator layer, thereby forming an anode portion. Openings are formed at four corners of the insulator layer or the anode portion, thereby establishing electrical connection between the cathode portions on both sides of the aluminum base. By setting the ratio of a total region, occupied by the openings, of the cathode portion to 25% or less, the ESL of a capacitor can be suppressed low even when the openings are provided.
    Type: Grant
    Filed: April 17, 2008
    Date of Patent: September 13, 2011
    Assignee: NEC Tokin Corporation
    Inventors: Yuji Yoshida, Katsuhiro Yoshida, Takeo Kasuga, Masanori Takahashi, Takeshi Saito, Koji Sakata
  • Patent number: 8014128
    Abstract: The present invention provides means for forming an oxide film on a metal surface, means for repairing a defect of an oxide film, a high-performance electrolytic capacitor using the means, and an electrolyte of the capacitor. Namely, the prevent invention provides a method for easily forming an oxide film on the surface of a metal or an alloy thereof by anodization using a solution containing an ionic liquid. In an application of this method, an electrolytic capacitor having means for repairing a defect of an oxide film can be formed by a method using, as an electrolyte, an ionic liquid, a solution containing an ionic liquid and a salt, or a solution containing an ionic liquid and a conductive polymer or a TCNQ salt, and a valve metal or an alloy thereof as a metal.
    Type: Grant
    Filed: July 26, 2004
    Date of Patent: September 6, 2011
    Assignee: Kaneka Corporation
    Inventors: Mutsuaki Murakami, Masamitsu Tachibana, Hiroyuki Furutani, Hideo Yamagishi
  • Publication number: 20110205689
    Abstract: A capacitor containing a solid electrolytic capacitor element and a conductive adhesive disposed between the capacitor element and another optional capacitor element, an electrode termination, or both, is provided. The conductive adhesive contains a plurality of spacer particles that are substantially spherical and have a relatively large diameter. The present inventors have discovered that the use of spacer particles having the desired size and shape can provide multiple benefits to the resulting capacitor. For example, the spacer particles can limit the degree to which the adhesive is compressed during manufacture, thereby ensuring that it will have the minimum thickness needed to achieve a reliable mechanical connection to the desired part. Further, when multiple capacitor elements are employed, the spacer particles can also help ensure that proper spacing is achieved between the different elements upon manufacture of the capacitor.
    Type: Application
    Filed: February 19, 2010
    Publication date: August 25, 2011
    Applicant: AVX CORPORATION
    Inventor: Silvie Vilcová
  • Patent number: 8004825
    Abstract: A solid electrolyte capacitor that prevents the capacitance from decreasing. The solid electrolyte capacitor includes an anode, a cathode, and a dielectric layer, which is arranged between the anode and the cathode in contact with the cathode. The dielectric layer includes a plurality of recesses arranged at an interface between the dielectric layer and the cathode.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: August 23, 2011
    Assignee: Sanyo Electric CO., Ltd.
    Inventors: Yasumi Kobayashi, Takashi Umemoto, Hiroshi Nonoue
  • Patent number: 8004824
    Abstract: The invention provides a solid electrolytic capacitor element, comprising a metal oxide layer, an electroconductive polymer layer, a carbon paste layer and a silver paste layer sequentially formed on surface of a valve-acting metal material, wherein thickness of the silver paste layer is within a range of 5 to 20 ?m and the mass ratio of silver contained in the silver paste layer is within a range of 84 to 94%. According to the invention, a solid electrolytic capacitor having good electric properties such as ESR (equivalent series resistance) and LC (leakage current) and good reliability can be produced.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: August 23, 2011
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Isao Kabe
  • Patent number: 7990685
    Abstract: A solid electrolytic capacitor includes a capacitor element, an anode lead frame, a cathode lead frame, and a mold resin portion. The anode lead frame includes an anode terminal portion and a rising portion, and the anode terminal portion is exposed at the bottom surface of the mold resin portion. The rising portion is formed integral with the anode terminal portion, and rises to the anode portion. In the rising portion, a through hole is formed. The cathode lead frame includes a cathode terminal portion, a pair of side surface portions and a step portion. Thus, a solid electrolytic capacitor allowing highly accurate and reliable attachment of the capacitor element to the lead frame without using any additional member is provided.
    Type: Grant
    Filed: December 8, 2008
    Date of Patent: August 2, 2011
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Keiko Matsuoka, Shoji Umeda, Yoshiyuki Fushimi, Koji Tezuka
  • Patent number: 7990681
    Abstract: An aluminum electrolytic capacitor having an excellent short-circuit resistance, high capacitance, long life, and low equivalent series resistance (ESR) is provided. For this purpose, the aluminum electrolytic capacitor includes a capacitor element having a positive electrode foil, a first separator, a negative electrode foil, and a second separator, which are sequentially laminated one on another and wound together. After the capacitor element is impregnated with a driving electrolyte solution and housed in a metallic case, an open end of the metallic case is sealed with a sealing material. A ratio of B/A, i.e. a ratio of total thickness B of the first and second separators after winding with respect to total thickness A of the first and second separators before winding, is set in the range from 0.5 to 0.8.
    Type: Grant
    Filed: May 9, 2007
    Date of Patent: August 2, 2011
    Assignee: Panasonic Corporation
    Inventors: Hisao Nagara, Kazunari Imamoto, Shigetaka Furusawa, Hiroyuki Matsuura
  • Patent number: 7990686
    Abstract: A solid electrolytic capacitor of the present invention includes: a capacitor element having an anode leading part and a cathode leading part; an anode lead frame connected to the anode leading part and a cathode lead frame connected to the cathode leading part; and an packing resin with which the capacitor element is coated, and the anode leading part protrudes from one end face of the capacitor element. The anode lead frame includes: an anode terminal part having an exposed surface exposed from the packing resin, a rising part connected to the anode terminal part, bent toward the anode leading part located in the upper part of the anode terminal part and extending in the packing resin, and a bent part connected to the rising part and bent along a direction which is parallel to a protruding direction of the anode leading part and connected to the anode leading part.
    Type: Grant
    Filed: March 12, 2009
    Date of Patent: August 2, 2011
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Keiko Matsuoka, Shoji Umeda
  • Publication number: 20110149476
    Abstract: A solid electrolytic capacitor element having a solid electrolyte layer provided on a dielectric layer formed on a surface of an anode body comprising a valve acting metal including a pore, wherein the anode body is configured in such a way that multiple plate-shaped anode bodies are directly piled and integrated with a solid electrolyte, and adjacent piled anode bodies are joined at a section thereof, and a method for producing the solid electrolytic capacitor element.
    Type: Application
    Filed: September 1, 2010
    Publication date: June 23, 2011
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Yoshihiro Saida, Masaaki Nishioka
  • Patent number: 7957120
    Abstract: The present invention relates to a capacitor chip and a solid electrolytic capacitor, wherein in a capacitor chip in which one or more capacitor element is laminated on a metal lead frame to carry electricity and the whole is encapsulated with resin, a laminated body is located within a certain definite range. The present invention enables to increase the capacitance of a capacitor by broadening the allowable range of the total thickness of the laminated capacitor chips without generating defective appearance of the laminated solid electrolytic capacitor.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: June 7, 2011
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Kenki Kobayashi, Eiji Komazawa, Tomoya Utashiro
  • Patent number: 7952854
    Abstract: An apparatus is disclosed which includes an electrolytic capacitive element with multiple capacitor sections.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: May 31, 2011
    Assignee: American Radionic Company, Inc.
    Inventor: Robert Stockman