Patents Assigned to NEC Tokin Corporation
  • Solid electrolytic capacitor and method of manufacturing same
    Patent number: 7835138
    Abstract: A solid electrolytic capacitor is provided in which volume efficiency of its capacitor element is improved. A converting substrate having an anode terminal forming portion and cathode terminal portion obtained by forming notches on faces exposed on outside faces of the anode and cathode portions and performing plating in the notches in portions in which the anode and cathode portions of a lower-face electrode type solid electrolytic capacitor is connected to the capacitor element and, after a sheathing resin is formed therein, the sheathed portion and converting substrate are cut along cutting planes to form fillet forming faces on the outside faces of the anode portion and cathode portion of the lower-face electrode type solid electrolytic capacitor.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: November 16, 2010
    Assignee: NEC Tokin Corporation
    Inventors: Daisuke Yamashita, Kazuhiro Koike, Kazuyuki Kato, Masako Ohya, Kunihiko Shimizu
  • Solid electrolytic capacitor and its manufacturing method
    Publication number: 20100254072
    Abstract: In a solid electrolytic capacitor whose cathode is formed by forming an oxide film 2 on an anode-body valve-action metal 1, and forming a conductive polymer layer 3, a graphite layer 4, and a silver layer 5 in succession on the oxide film, the conductive polymer layer 3 contains a sulfonic acid ester compound. In this way, a solid electrolytic capacitor having a low ESR and an excellent moisture resistance and its manufacturing method can be provided.
    Type: Application
    Filed: April 1, 2010
    Publication date: October 7, 2010
    Applicant: NEC TOKIN CORPORATION
    Inventors: Tomoki Nobuta, Yasuhisa Sugawara, Satoshi Suzuki, Naoki Takahashi, Ryuta Kobayakawa
  • SOFT MAGNETIC AMORPHOUS ALLOY
    Publication number: 20100188186
    Abstract: A soft magnetic amorphous alloy represented by the following composition formula: {Fea(SixByPz)1-a}100-bLb. In the composition formula, L represents one or more elements selected from Al, Cr, Zr, Nb, No, Hf, Ta and W, and a, b, x, y, and z meets the conditions of: 0.7?a?0.82; 0?b?5 atomic %; 0.05?x?0.6; 0.1?y?0.85; 0.05?z?0.7; and x+y+z=1.
    Type: Application
    Filed: September 16, 2008
    Publication date: July 29, 2010
    Applicants: NEC Tokin Corporation, Tohoku University
    Inventors: Akiri Urata, Hiroyuki Matsumoto, Akihiro Makino
  • LITHIUM SECONDARY BATTERY
    Publication number: 20100173201
    Abstract: An objective of the present invention is to provide a lithium secondary battery which can achieve a higher capacity and a longer life without reduction in a lower voltage in the battery. In the present invention, a compound represented by general formula (I) described below is used as a cathode active material, and a compound represented by general formula (II) described below is used as an anode active material; Lia1(Nix1Mn2-x1-y1M1y1)O4??(I) wherein the M1 is at least one of Ti, Si, Mg and Al, the a1 satisfies 0?a1?1, the x1 satisfies 0.4?x1?0.6, and the y1 satisfies 0?y1?0.4; and Lia2M21-y2M3y2Oz2??(II) wherein the M2 is at least one of Si and Sn; the M3 is at least one of Fe, Ni and Cu, the a2 satisfies 0?a2?5, the y2 satisfies 0?y2<0.3, and the z2 satisfies 0<z2<2.
    Type: Application
    Filed: March 17, 2010
    Publication date: July 8, 2010
    Applicant: NEC TOKIN CORPORATION
    Inventors: Takehiro NOGUCHI, Masaaki MATSUU, Ryuichi KASAHARA, Tatsuji NUMATA, Yutaka BANNAI
  • LITHIUM SECONDARY BATTERY
    Publication number: 20100173200
    Abstract: An objective of the present invention is to provide a lithium secondary battery which can achieve a higher capacity and a longer life without reduction in a lower voltage in the battery. In the present invention, a compound represented by general formula (I) described below is used as a cathode active material, and a compound represented by general formula (II) described below is used as an anode active material; Lia1(Nix1Mn2-x1-y1M1y1)O4??(I) wherein the M1 is at least one of Ti, Si, Mg and Al, the a1 satisfies 0?a1?1, the x1 satisfies 0.4?x1?0.6, and the y1 satisfies 0?y1?0.4; and Lia2M21-y2M3y2Oz2??(II) wherein the M2 is at least one of Si and Sn; the M3 is at least one of Fe, Ni and Cu, the a2 satisfies 0?a2?5, the y2 satisfies 0?y2?0.3, and the z2 satisfies 0?z2?2.
    Type: Application
    Filed: March 17, 2010
    Publication date: July 8, 2010
    Applicant: NEC TOKIN CORPORATION
    Inventors: Takehiro NOGUCHI, Masaaki MATSUU, Ryuichi KASAHARA, Tatsuji NUMATA, Yutaka BANNAI
  • Switching device
    Patent number: 7750771
    Abstract: Magnetic attractive force of a magnet exerted on a movable contact in a sealing case through yokes changes as a result of movement of a magnetic shunt element induced by movement of a movable element located outside the sealing case. As a result, the movable contact can be brought into or out of contact with a stationary contact without involvement of entry of the movable element into the sealing case.
    Type: Grant
    Filed: April 22, 2008
    Date of Patent: July 6, 2010
    Assignees: Kabushiki Kaisha Tokai Rika Denki Seisakusho, NEC Tokin Corporation
    Inventors: Tomio Yamada, Katsuhide Kumagai, Masahiko Miyata, Yoshinori Ota, Tatsumi Ide
  • REACTOR AND METHOD OF PRODUCING THE REACTOR
    Publication number: 20100123541
    Abstract: A reactor is composed of a coil and a core placed in the inside area and outer peripheral area of the coil in a container. The core is composed of magnetic powder, non-magnetic powder, and resin. The nom-magnetic powder is composed of main component powder and low elastic modulus powder. The main component powder as a main component of the non-magnetic powder is made of one or more kinds of powder of a heat conductivity which is larger than that of the resin. The low elastic modulus powder is made of one or more kinds of powder of an elastic modulus which is smaller than that of the powder forming the main component powder.
    Type: Application
    Filed: November 16, 2009
    Publication date: May 20, 2010
    Applicants: DENSO CORPORATION, NEC TOKIN CORPORATION
    Inventors: Kenji SAKA, Takashi Yanbe
  • Method for manufacturing a solid electrolytic capacitor
    Patent number: 7717967
    Abstract: A method for manufacturing a solid electrolytic capacitor has the steps of: mixing valve metal powders with organic binder for granulation, press-molding granulated powders embedded with a valve metal lead, sintering a press-molded compact in vacuum to produce a sintered body, and anodizing the sintered body to form a dielectric oxide film layer. The method further has a step of performing a cathode electrolytic cleaning to the sintered body before the step of forming the dielectric oxide film layer. The cathode electrolytic cleaning is performed in an acid solution, which is a mixed acid solution of hydrofluoric acid, nitric acid, and sulfuric acid.
    Type: Grant
    Filed: September 5, 2008
    Date of Patent: May 18, 2010
    Assignee: NEC TOKIN Corporation
    Inventors: Yasuhisa Sugawara, Masako Ohya, Katsuhiro Yoshida
  • Inductance device, filter device comprising the same, and noise filter comprising the same
    Patent number: 7714683
    Abstract: An inductance device comprises a magnetic core, a coil a conductor and a dielectric member. The coil is made of turns of insulated conductive wire. The conductor is distinct from the coil and is insulated from the magnetic core. The dielectric member is disposed between the conductor and the coil. The dielectric member, the conductor and the coil constitute a capacitor. The inductance device is used in, for example, a filter device or a noise filter.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: May 11, 2010
    Assignee: NEC TOKIN Corporation
    Inventors: Masahiko Takahashi, Hiroshi Ono, Satoshi Arai, Teruhiko Fujiwara
  • Screw attachment, fastening assembly having screw attachment, and process of releasing fastening assembly
    Patent number: 7699568
    Abstract: A screw attachment (10, 10?, 10?) disposed around a fastening piece (17) secured to a main fastening body (25a), the screw attachment sandwiched between a head (17b) of the fastening piece and a securing object (22) so that the screw attachment bears a securing force of the fastening piece to press the securing object. The screw attachment includes a pair of arms (12, 13) made of a shape restoring material. Each arm has a fore end, and the fore ends are joined to each other with an adhesive material that is softened when heated. The arms expands radially such that the screw attachment is released from the head of the fastening piece when heat or force is applied to the arms.
    Type: Grant
    Filed: May 24, 2004
    Date of Patent: April 20, 2010
    Assignees: Union Seimitsu Co. Ltd, NEC Tokin Corporation, Sharp Kabushiki Kaisha, Tokai University Educational System
    Inventors: Kazuo Sugiyama, Tadashi Tashima, Kazunari Yoshida, Yu Kagami, Hideo Takaara, Yoshio Shindoh, Masanobu Tanigawa
  • Conductive polymer composition, method of producing the same, and solid electrolytic capacitor
    Publication number: 20100091432
    Abstract: A conductive polymer composition with excellent water resistance and conductivity, and a solid electrolytic capacitor with low ESR, excellent reliability, and especially moisture resistance. The conductive polymer composition includes a conductive polymer, a polyanion that includes a hydrophilic group, where the polyanion functioning as a dopant of the conductive polymer. At least a part of the hydrophilic group of the polyanion is condensed with an epoxy group in a compound with one epoxy group. A solid electrolytic capacitor of the present invention includes the conductive polymer composition.
    Type: Application
    Filed: September 21, 2009
    Publication date: April 15, 2010
    Applicant: NEC TOKIN CORPORATION
    Inventors: Yasuhisa Sugawara, Tomoki Nobuta, Naoki Takahashi, Ryuta Kobayakawa, Satoshi Suzuki
  • LITHIUM ION BATTERY
    Publication number: 20100092869
    Abstract: To provide high energy density, good cycle properties and rate characteristics and long-term safety of a lithium ion battery containing at least an ionic liquid and a lithium salt. The above problems are solved by suppressing reduction and decomposition of the ionic liquid on an anode by using a graphite coated with an amorphous carbon or onto which an amorphous carbon is deposited as an anode active material.
    Type: Application
    Filed: September 2, 2009
    Publication date: April 15, 2010
    Applicant: NEC TOKIN CORPORATION
    Inventors: Shinako KANEKO, Hitoshi ISHIKAWA, Yasutaka KONO, Yoko HASHIZUME, Hiroshi KOBAYASHI
  • Solid electrolytic capacitor and forming method for the same
    Patent number: 7684172
    Abstract: A solid electrolytic capacitor includes a valve metal formed with an anodized film; an inner conductive polymer film formed on the anodized film; and an outer conductive polymer film formed on the inner conductive polymer film. The outer conductive polymer film is obtained by: preparing a first polymer solution (PEDOT/PSSA); dissolving a predetermined dissolved substance in a non-aqueous solvent, the predetermined dissolved substance being selected from the group consisting of boric acid, 1-naphthalenesulfonic acid, 2-naphthalenesulfonic acid, 1,3,6-naphthalenetrisulfonic acid, and polystyrenesulfonic acid, and a salt thereof; mixing the dissolved solvent with pure water to obtain an additive solution; adding the additive solution into the first polymer solution to obtain a second polymer solution; and applying the second polymer solution to the inner conductive polymer film.
    Type: Grant
    Filed: November 27, 2007
    Date of Patent: March 23, 2010
    Assignee: NEC TOKIN Corporation
    Inventors: Takeo Kasuga, Yuji Yoshida, Masanori Takahashi, Ryuta Kobayakawa, Takeshi Saito, Koji Sakata, Sadamu Toita, Katsuhiro Yoshida
  • METHOD OF MANUFACTURING A SOLID ELECTROLYTIC CAPACITOR WITH A SUFFICIENTLY LOW IMPEDANCE IN A HIGH FREQUENCY RANGE
    Publication number: 20100065434
    Abstract: In a method of manufacturing a solid electrolytic capacitor in which an electrolyte layer containing a conductive polymer is formed by chemical oxidative polymerization on a dielectric oxide film layer formed by anodizing surfaces of a valve metal, an ammonium peroxodisulfate solution adjusted to pH 6 to 8 is used as an oxidant in forming the conductive polymer layer.
    Type: Application
    Filed: September 11, 2009
    Publication date: March 18, 2010
    Applicant: NEC TOKIN Corporation
    Inventors: Yasuhisa SUGAWARA, Kazuyuki Katoh, Masako Ohya
  • Inductor
    Patent number: 7679482
    Abstract: An inductor includes a first magnetic substance core which has a middle leg, a first outer leg, a second outer leg, and a body portion interconnecting the middle leg, the first outer leg and the second outer leg, and a second magnetic substance core which is arranged to be opposed to the first magnetic substance core. A first conductor is arranged in a first space which is formed by the middle leg, the first outer leg, part of the body portion, and the second magnetic substance core. A second conductor is arranged in a second space which is formed by the middle leg, the second outer leg, part of the body portion, and the second magnetic substance core. The middle leg is formed with a region which is lower in height than the first outer leg, in the same direction as the longitudinal direction of the first outer leg.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: March 16, 2010
    Assignee: NEC Tokin Corporation
    Inventors: Seiichi Yamada, Okikuni Takahata, Hiroyuki Kamata, Fumishirou Tsuda, Masahiro Kondo
  • LITHIUM ION SECONDARY BATTERY
    Publication number: 20100062332
    Abstract: A lithium ion secondary battery shows excellent charge/discharge properties and also excellent storage properties. The lithium ion secondary battery includes an aprotic electrolyte containing a sulfonate ester having at least two sulfonyl groups and graphite as principal component of negative electrode active substance layers, the density of the negative electrode active substance layers being not less than 0.90 g/cm3 and not more than 1.65 g/cm3.
    Type: Application
    Filed: September 8, 2009
    Publication date: March 11, 2010
    Applicant: NEC TOKIN CORPORATION
    Inventor: Tomokazu Kumeuchi
  • METHOD OF FABRICATING REACTOR
    Publication number: 20100031497
    Abstract: A method of fabricating a reactor composed of a coil, a core, and a container, capable of suppressing the core to break when a current flows in the coil to generate magnetic flux. In the method, the coil is formed by spirally winding a conductive wire. The coil is immersed in an insulating film in liquid with electrical insulation. The coil is placed in a furnace. Annealing for the coil and thermosetting for the insulating film are performed at a temperature within 250 to 320° C. for a period of time within 30 minutes to one hour before forming the core in the container. The coil is then disposed in the container. Inside and outside areas of the coil in the container is filled with a resin mixture composed of magnetic powder and resin. The resin mixture in the container is hardened to form the core.
    Type: Application
    Filed: August 4, 2009
    Publication date: February 11, 2010
    Applicants: DENSO CORPORATION, NEC TOKIN CORPORATION
    Inventors: Kenji SAKA, Yousuke Setaka, Hiroyuki Katsuta, Takashi Yanbe
  • CONDUCTIVE POLYMER SUSPENSION AND METHOD FOR PRODUCING THE SAME, CONDUCTIVE POLYMER MATERIAL, ELECTROLYTIC CAPACITOR, AND SOLID ELECTROLYTIC CAPACITOR AND METHOD FOR PRODUCING THE SAME
    Publication number: 20100033905
    Abstract: The present invention provides a conductive polymer suspension for providing a conductive polymer material having a high conductivity and a method for producing the same, and in particular, a solid electrolytic capacitor having a low ESR and a method for producing the same. The conductive polymer suspension is produced by: synthesizing a conductive polymer by chemical oxidative polymerization of a monomer giving the conductive polymer by using an oxidant in a solvent containing a dopant consisting of a low-molecular organic acid or a salt thereof; purifying the conductive polymer; and mixing the purified conductive polymer and an oxidant in an aqueous solvent containing a polyacid component.
    Type: Application
    Filed: July 28, 2009
    Publication date: February 11, 2010
    Applicant: NEC Tokin Corporation
    Inventors: Ryuta KOBAYAKAWA, Tomoki NOBUTA, Naoki TAKAHASHI, Yasuhisa SUGAWARA, Satoshi SUZUKI, Toshihiko NISHIYAMA
  • CONDUCTIVE POLYMER SUSPENSION AND METHOD FOR PRODUCING THE SAME, CONDUCTIVE POLYMER MATERIAL, ELECTROLYTIC CAPACITOR, AND SOLID ELECTROLYTIC CAPACITOR AND METHOD FOR PRODUCING THE SAME
    Publication number: 20100033906
    Abstract: The present invention provides a conductive polymer suspension for providing a conductive polymer material having a high conductivity and a method for producing the same, and in particular, a solid electrolytic capacitor having a low ESR and a method for producing the same. The conductive polymer suspension can be is produced by: synthesizing a conductive polymer by chemical oxidative polymerization of a monomer giving the conductive polymer by using an oxidant in an aqueous solvent containing a dopant consisting of a low-molecular organic acid or a salt thereof, or a polyacid having a weight average molecular weight of less than 2,000 or a salt thereof.
    Type: Application
    Filed: July 28, 2009
    Publication date: February 11, 2010
    Applicant: NEC Tokin Corporation
    Inventors: Tomoki NOBUTA, Ryuta KOBAYAKAWA, Naoki TAKAHASHI, Yasuhisa SUGAWARA, Satoshi SUZUKI, Toshihiko NISHIYAMA
  • Balloon expandable superelastic stent
    Patent number: 7658761
    Abstract: A balloon expandable superelastic stent is made of a Ti—Ni—Nb (the content of Nb being at least 3 at %) shape memory alloy. A shape recovery temperature of the stent is lower than a living body temperature in an unloaded state after shape memory treatment. The shape recovery temperature exceeds the living body temperature after the stent is mounted to a catheter and released from the catheter in a living body.
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: February 9, 2010
    Assignees: NEC Tokin Corporation, Japan Stent Technology Co., Ltd.
    Inventors: Kiyoshi Yamauchi, Kouji Mori, Shuzou Yamashita