Patents Assigned to NEC Tokin Corporation
  • 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: 8035954
    Abstract: An exterior case for a surface-mount type electrolytic capacitor has a box type resin case and an exterior case cover. The resin case incorporates anode terminals and a cathode terminal at the bottom portion and is open upward. The exterior cover covers the top and an outer surface of a side wall of the resin case. A convex portion is formed on an inner surface of a ceiling of the exterior case cover and, thereby, a concave portion is formed between an inner surface of the side wall of the exterior case cover and the convex portion. The concave portion and an upper end portion of the side wall of the resin case are fitted together with an adhesive therebetween. An upper surface of the capacitor element is pressed by the convex portion of the inner surface of the ceiling of the exterior case cover and, thereby, a positional deviation thereof is prevented.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: October 11, 2011
    Assignee: NEC Tokin Corporation
    Inventor: Osamu Funaya
  • Publication number: 20110233450
    Abstract: The present exemplary embodiment provides a conductive polymer having high conductivity and a method for producing the same, and a conductive polymer dispersion, and further provides a solid electrolytic capacitor having low ESR and a method for producing the same. A conductive polymer is produced by a method including the steps of dissolving a sulfonic acid group-containing resin having a weight average molecular weight of 2,000 or more and 50,000 or less and a compound represented by the following formula (1) in a solvent; mixing at least one monomer selected from pyrrole, thiophene, and derivatives thereof in an obtained solution; subjecting the monomer to chemical oxidative polymerization, using a persulfate, to obtain a conductive polymer; and washing the conductive polymer to remove the compound represented by the formula (1) contained in the conductive polymer. CnHn+2(OH)n??(1) wherein n represents an integer of 3 to 6.
    Type: Application
    Filed: March 23, 2011
    Publication date: September 29, 2011
    Applicant: NEC TOKIN CORPORATION
    Inventors: Tomoki NOBUTA, Yasuhisa SUGAWARA, Yuji YOSHIDA, Satoshi SUZUKI, Yasuhiro TOMIOKA
  • 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: 8014129
    Abstract: A stacked solid electrolytic capacitor includes a plurality of stacked solid electrolytic capacitor elements. Each solid electrolytic capacitor element includes an anode formed of a valve action metal, an anode section formed on an end of the anode, a dielectric formed on the surface of the valve action metal and including an oxide of the valve action metal, and a cathode layer formed on the dielectric. The cathode layers and the anode sections of the solid electrolytic capacitor elements are, respectively, connected to each other across the plurality of stacked solid electrolytic capacitor elements. A conductive layer extending in the stacking direction is formed on at least part of a side face of an area where the cathode layers of the solid electrolytic capacitor elements are formed.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: September 6, 2011
    Assignee: NEC Tokin Corporation
    Inventors: Takeshi Saito, Takeo Kasuga, Koji Sakata
  • Patent number: 8014127
    Abstract: In a solid electrolytic capacitor, a capacitor element laminate formed by stacking capacitor elements each using a valve metal as an anode body is bonded to a substrate by a conductive adhesive and packaged by a resin portion. The substrate includes a printed substrate made of an epoxy resin. On its mounting surface for the capacitor element laminate, there are provided an anode mounting portion and a cathode mounting portion each made of a copper base material. The anode mounting portion and the cathode mounting portion are electrically connected to an external anode terminal and an external cathode terminal, respectively, formed on the mounting surface of the solid electrolytic capacitor, through anode vias and cathode vias each penetrating through the epoxy resin. A part of the anode mounting portion on the substrate (6) extends to the outside of the packaging resin portion.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: September 6, 2011
    Assignee: NEC Tokin Corporation
    Inventors: Takeo Kasuga, Takashi Mizukoshi, Koji Sakata, Takeshi Saito
  • Publication number: 20110197435
    Abstract: The present invention provides a stack-type lithium-ion polymer battery wherein: the battery capacity is not being degraded; the generation of the wrinkles and fracture of the separator is being suppressed; the battery has gas releasing paths; the displacement of an electrode stack hardly occurs; and the workability at the time of placing the electrode stack in a package body is improved by fixing the electrode stack. A stack-type lithium-ion polymer battery of the present invention comprises: a cathode 13; an anode 14; a separator 15; and a gel electrolyte; wherein an electrode stack 23 in which the cathode 13 and the anode 14 are stacked through the separator 15 is enclosed and fixed by insulating porous sheets 21 and 24, and is packaged with a laminate material.
    Type: Application
    Filed: April 26, 2011
    Publication date: August 18, 2011
    Applicant: NEC TOKIN CORPORATION
    Inventors: Shinako KANEKO, Ryuichi KASAHARA, Hiroshi KOBAYASHI, Yasutaka KONO, Toshihiko NISHIYAMA
  • Publication number: 20110183130
    Abstract: This provides a fabrication method for fabricating a ferrite-provided body comprising a base member 3 and a ferrite film provided on the base member 3. The fabrication method includes: supporting the base member 3 with a space kept on a back of the base member 3, the space being 100 ?m or more; supplying a reaction solution and an oxidizing solution for a front of the base member 3 from a reaction solution nozzle 1 and an oxidizing solution nozzle 2, the reaction solution containing at least ferrous ions (Fe2+ ions), the oxidizing solution containing at least an oxidizing agent; and applying, to the reaction solution and the oxidizing solution, acceleration of 2˜150 m/s2 which comes from a cause other than gravity.
    Type: Application
    Filed: July 29, 2009
    Publication date: July 28, 2011
    Applicant: NEC Tokin Corporation
    Inventors: Koichi Kondo, Hiroshi Ono, Yukihiro Numata
  • Publication number: 20110182002
    Abstract: The present invention provides a conductive polymer suspension for providing a conductive polymer material having high conductivity and a method for producing the same, and particularly provides a solid electrolytic capacitor having low ESR and a method for producing the same. In an emulsion comprising a dopant of a low molecular organic acid or a salt thereof, obtained by emulsifying a monomer providing a conductive polymer, using a nonionic surfactant, in a water, the monomer is subjected to chemical oxidative polymerization, using an oxidant, to synthesize a conductive polymer. The obtained conductive polymer is purified, and then, the purified conductive polymer and an oxidant are mixed in an aqueous solvent containing a polyacid component to produce a conductive polymer suspension.
    Type: Application
    Filed: January 25, 2011
    Publication date: July 28, 2011
    Applicant: NEC TOKIN CORPORATION
    Inventors: Naoki TAKAHASHI, Tomoki NOBUTA, Yasuhisa SUGAWARA, Yuji YOSHIDA, Satoshi SUZUKI, Yasuhiro TOMIOKA
  • Patent number: 7978037
    Abstract: A movable contact positioned in a sealed case is moved together with a movable contact spring provided with an armature by a magnetic shunt body which is moved outside the sealed case. The movement of the movable contact (movement of the movable contact spring) due to the movement of the magnetic shunt body is based on the change of the magnetically attracting force of a magnet with respect to the armature through a pair of yokes. The movable contact spring is provided with a bent portion which is bent in spaced-apart relation to the armature, the bent portion being provided between a fulcrum portion at a time when the movable contact spring moves and a portion where the armature is provided.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: July 12, 2011
    Assignees: Kabushiki Kaisha Tokai Rika Denki Seisakusho, NEC TOKIN Corporation
    Inventors: Tomio Yamada, Tatsumi Ide, Yoshinori Ota
  • Publication number: 20110122546
    Abstract: Provided are 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 as follows: a conductive polymer is synthesized by chemical oxidative polymerization of a monomer giving a conductive polymer by using an oxidant in a solvent containing a dopant consisting of polysulfonic acid or a salt thereof; the conductive polymer is purified; and the purified conductive polymer is mixed with an oxidant in an aqueous solvent containing a polyacid component.
    Type: Application
    Filed: November 22, 2010
    Publication date: May 26, 2011
    Applicant: NEC TOKIN CORPORATION
    Inventors: Tomoki NOBUTA, Naoki TAKAHASHI, Yasuhisa SUGAWARA, Yuji YOSHIDA, Satoshi SUZUKI, Yasuhiro TOMIOKA
  • Publication number: 20110121926
    Abstract: To provide an electromagnetic relay having a reduced size, high conductivity, a high insulating performance between two fixed contact terminals and between each of the fixed contact terminals and backstop, a small number of factors causing a failure, and high reliability of electric contact. An electromagnetic relay has an electromagnetic block provided with a movable contact spring 14 swung by current flowing in a coil, two fixed contact terminals 22 and 22? each having a fixed contact, a backstop 23 having two movable contact abutment portions, and a base block 2 for retaining the above components. The base block 2 has a base portion 20 having substantially a rectangular shape, fixed contact terminal retaining portions 21 and 21? extending vertically from two opposing sides of the rectangle so as to retain the two fixed contact terminals, and a backstop retaining portion 24 extending vertically from the center portion of one of the remaining two opposing sides of the rectangle.
    Type: Application
    Filed: March 30, 2009
    Publication date: May 26, 2011
    Applicant: NEC TOKIN CORPORATION
    Inventors: Katsuto Kojima, Kei Chiba, Kouichi Mutou
  • Publication number: 20110109410
    Abstract: To provide a twin-type power electromagnetic relay having high reliability, having a reduced size and low mounting height, and suitable for surface mounting. By inserting projections provided in a coil spool, which is a component constituting an electromagnetic relay block, into projection insertion holes 5a and 5b formed in a base plate 5, two electromagnetic relay blocks 4A and 4B are arranged side by side on the base plate 5 such that their central axes are nearly parallel to the base plate. A base protective wall 5c is provided on the base plate 5, and a coil wire winding terminal portion of a spool is covered by the base protective wall and by a fixed terminal protective wall on the fixed terminal block when assembled, preventing foreign matters such as flux from entering between the contacts from the winding terminal portion.
    Type: Application
    Filed: May 12, 2009
    Publication date: May 12, 2011
    Applicant: NEC TOKIN CORPORATION
    Inventors: Yoshifumi Chida, Kei Chiba
  • Patent number: 7932796
    Abstract: A movable contact which is positioned inside a sealing case is moved by a magnetic shunt body which moves outside the sealing case. The movement of the movable contact by the movement of the magnetic shunt body is caused by a change of magnetic force of a magnet through a pair of yokes. The magnetic shunt body is assembled to a moving member, and elastically moves around the moving member resisting a first spring.
    Type: Grant
    Filed: October 2, 2008
    Date of Patent: April 26, 2011
    Assignees: Kabushiki Kaisha Tokai Rika Denki Seisakusho, NEC Tokin Corporation
    Inventors: Tomio Yamada, Masahiko Miyata, Katsuhide Kumagai, Tatsumi Ide, Yoshinori Ota
  • Patent number: 7898795
    Abstract: A solid-state electrolytic capacitor including a stacked body of a solid-state electrolytic capacitor element unit and an electrode conversion board. The unit includes two kinds of solid-state electrolytic capacitor elements. Each of first kind of solid-state electrolytic capacitor elements uses an anode body having a total thickness of an aluminum foil of 350 ?m and a residual core thickness, i.e., the total thickness minus the thickness of an etched layer, is 50 ?m. A second kind of solid-state electrolytic capacitor element provided on the mounting surface side uses an anode body having a total thickness of an aluminum foil of 150 ?m and a residual core thickness is 50 ?m. The electrode conversion board includes external anode and external cathode terminals that are arranged in a checkered manner and also includes, on the side opposite to the board, anode electrode and cathode electrode plates.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: March 1, 2011
    Assignee: NEC TOKIN Corporation
    Inventors: Takeo Kasuga, Masanori Takahashi, Koji Sakata, Yuji Yoshida, Takeshi Saito, Katsuhiro Yoshida
  • Publication number: 20110019340
    Abstract: An electrically conductive polymer composition has high electrical conductivity, excellent water resistance, high density, and excellent smoothness. Also disclosed is a solid electrolyte capacitor which is prevented from the reduction in electrical conductivity, has low ESR, and also has excellent reliability. Further disclosed is a method for producing the solid electrolyte capacitor. The electrically conductive polymer composition is produced by removing a dispersion medium from an electrically conductive polymer suspension, wherein the electrically conductive polymer suspension includes: an electrically conductive polymer material including a dopant composed of a polyacid or a salt thereof and an electrically conductive polymer; at least one compound (A) selected from erythritol, xylitol and pentaerythritol; and the dispersion medium.
    Type: Application
    Filed: April 10, 2009
    Publication date: January 27, 2011
    Applicant: NEC TOKIN CORPORATION
    Inventors: Tomoki Nobuta, Ryuta Kobayakawa, Naoki Takahashi, Yasuhisa Sugawara, Satoshi Suzuki
  • Patent number: 7872558
    Abstract: A coil device having a bobbin structure, includes a body section, a first flange section and a second flange section. The body section is positioned between the first flange section and the second flange section in a first horizontal direction. The first flange section includes a first lower base and a first upper portion. The first upper portion extends upwardly from the first lower base. The first upper portion is provided with a first upper edge on which at least one guide recess is formed. The second flange section includes a second lower base and a second upper portion. The second lower base faces the first lower base in the first horizontal direction. The second upper portion extends upwardly from the second lower base. The second upper portion faces the first upper portion in the first horizontal direction with the body section interposed therebetween.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: January 18, 2011
    Assignee: NEC TOKIN Corporation
    Inventor: Sadakatsu Sakuma
  • Publication number: 20100302714
    Abstract: An exemplary aspect of the invention provides a conductive polymer suspension for providing a conductive polymer material with high conductivity and a method for producing the same, and provides a solid electrolytic capacitor with low ESR and a method for producing the same. In an exemplary embodiment, a monomer providing a conductive polymer is subjected to chemical oxidative polymerization in a solvent comprising a dopant of an organic acid or a salt thereof, using an oxidant, to synthesize the conductive polymer; the conductive polymer is purified; the purified conductive polymer and an oxidant are mixed in an aqueous solvent comprising a polyacid; and an imidazole compound is further added to produce a conductive polymer suspension.
    Type: Application
    Filed: May 17, 2010
    Publication date: December 2, 2010
    Applicant: NEC Tokin Corporation
    Inventors: Ryuta Kobayakawa, Tomoki Nobuta, Naoki Takahashi, Yasuhisa Sugawara, Satoshi Suzuki
  • Publication number: 20100297340
    Abstract: There is provided a method for producing a solid electrolytic capacitor having an improved capacitance appearance ratio by forming a conductive polymer layer in a few steps. A method for producing a solid electrolytic capacitor obtained by forming solid electrolyte layer 5 and cathode 6 on dielectric layer 2 formed on anode body 1, which is a porous body of a valve action metal, includes the step of forming precoat layer 3 by the steps of impregnating the porous body with polyacid, water washing, and drying.
    Type: Application
    Filed: May 14, 2010
    Publication date: November 25, 2010
    Applicant: NEC TOKIN CORPORATION
    Inventors: Satoshi SUZUKI, Tomoki NOBUTA, Naoki TAKAHASHI, Yasuhisa SUGAWARA, Ryuta KOBAYAKAWA, Akiko OSHIMA
  • Patent number: 7839119
    Abstract: A charging device for a portable phone is provided which is capable of achieving its improved usability by making the device small-sized, improving its portability, and enabling instant telephone speech even in a state in which a battery of the portable phone has been exhausted. The charging device for a portable phone for charging a rechargeable battery housed in a portable phone includes the first charging section to charge the rechargeable battery housed in the portable phone and the second charging section to charge the lithium-ion battery built in the first charging section in which the first and second charging sections are connected so as to be freely detachable and attachable from or to each other and can be disconnected from each other.
    Type: Grant
    Filed: November 19, 2007
    Date of Patent: November 23, 2010
    Assignee: NEC Tokin Corporation
    Inventor: Katsuya Onose