Patents Assigned to NEC Tokin Corporation
  • Publication number: 20040207500
    Abstract: An inductor component according to the present invention includes a magnetic core including at least one magnetic gap having a gap length of about 50 to 10,000 &mgr;m in a magnetic path, a magnet for magnetic bias arranged in the neighborhood of the magnetic gap in order to supply magnetic bias from both sides of the magnetic gap, and a coil having at least one turn applied to the magnetic core. The aforementioned magnet for magnetic bias is a bonded magnet containing a resin and a magnet powder dispersed in the resin and having a resistivity of 1 &OHgr;·cm or more. The magnet powder includes a rare-earth magnet powder having an intrinsic coercive force of 5 KOe or more, a Curie point of 300° C. or more, the maximum particle diameter of 150 &mgr;m or less, and an average particle diameter of 2.
    Type: Application
    Filed: May 11, 2004
    Publication date: October 21, 2004
    Applicant: NEC TOKIN CORPORATION
    Inventors: Teruhiko Fujiwara, Masayoshi Ishii, Haruki Hoshi, Keita Isogai, Toru Ito, Tamiko Ambo
  • Patent number: 6807045
    Abstract: An external cathode terminal (16) is adhered to one surface of a capacitor element while a prepreg (25) is adhered to another surface of the capacitor element. A reinforcement plate (26) is adhered to the prepreg. Heat and pressure are applied to the external cathode terminal, the prepreg, and the reinforcement plate to elute thermosetting resin from the prepreg in the side of the capacitor element, thereby sealing the side of the capacitor element with eluted material (27A, 27B). Inasmuch as transfer molding is not used as exterior package, the element never deforms by injection pressure of resin. It is possible to thin by a thickness of exterior package resin. Inasmuch as eluted thermosetting resin does not include a mold release agent, it has good adhesion for the external cathode terminal.
    Type: Grant
    Filed: July 17, 2003
    Date of Patent: October 19, 2004
    Assignee: NEC Tokin Corporation
    Inventors: Satoshi Arai, Takayuki Inoi, Yoshihiko Saiki, Sadamu Toita
  • Publication number: 20040201949
    Abstract: A chip-type solid electrolytic capacitor comprises two capacitor elements using a valve metal and laminated in a direction perpendicular to a mounting surface to be mounted on a substrate. A pair of anode lead wires are extracted on one side from anode members of the capacitor elements in parallel to the mounting surface. The anode lead wires are connected to two branches of an anode terminal portion, respectively. A cathode terminal is connected to cathode layers on dielectric oxide films of the anode members. The solid electrolytic capacitor is encapsulated in an encapsulating resin with the anode terminal and the cathode terminal partially exposed. The branches of the anode terminal portion are configured so that they overlap each other by rotation of 180° around a center line.
    Type: Application
    Filed: March 29, 2004
    Publication date: October 14, 2004
    Applicants: NEC TOKIN Corporation, NEC TOKIN Toyama, Ltd.
    Inventors: Fumio Kida, Shinji Arai, Takahiro Kayamori, Masao Hinazuru
  • Patent number: 6800395
    Abstract: A secondary battery of a proton conductive polymer, wherein a positive electrode and a negative electrode are arranged facing to each other via a separator in an electrolyte and only a proton or a proton of a hydroxyl group in an indole trimer and a &pgr; conjugated polymer, i.e., an active material of electrode in the positive electrode and in the negative electrode participates in a charge/discharge, and a proton concentration is 5 to 40% and an anion concentration is 30 to 60% in the solution, respectively, and the anion concentration is at least higher than the proton concentration.
    Type: Grant
    Filed: November 13, 2001
    Date of Patent: October 5, 2004
    Assignee: NEC Tokin Corporation
    Inventors: Tomoki Nobuta, Toshihiko Nishiyama, Hiroyuki Kamisuki, Gaku Harada, Masato Kurosaki, Yuuji Nakagawa, Shinya Yoshida, Masaya Mitani
  • Patent number: 6791446
    Abstract: An inductance component includes a magnetic core (11, 12) forming a magnetic circuit having a magnetic gap, an exciting coil (14) wound around the magnetic core, and a permanent magnet (13) disposed in the magnetic gap. The permanent magnet is greater in sectional area than the magnetic core.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: September 14, 2004
    Assignee: NEC Tokin Corporation
    Inventors: Mizuho Sato, Kazuyuki Okita, Toru Ito, Gen Daigaku
  • Publication number: 20040174660
    Abstract: In a stacked solid electrolytic capacitor or a stacked transmission line element, anode portions of adjacent elements are electrically and mechanically connected to each other by the use of connecting members each in the form of a conductive adhesive or solderable metal, via metal plates connected to the anode portions so as to sandwich therebetween the anode portions, respectively, from the upper and lower surfaces thereof. On the other hand, cathode portions of the adjacent elements are electrically and mechanically connected to each other by a conductive adhesive, or are electrically and mechanically connected to each other by the use of adhesive insulating sheets each having a hollowed portion and a conductive adhesive filled in the hollowed portions, or are adhered to each other by adhesive insulating sheets, then electrically connected to each other by a conductive adhesive applied onto side surfaces of the cathode portions.
    Type: Application
    Filed: February 13, 2004
    Publication date: September 9, 2004
    Applicant: NEC TOKIN Corporation
    Inventors: Satoshi Arai, Yoshihiko Saiki, Sadamu Toita, Takayuki Inoi
  • Patent number: 6788185
    Abstract: A powder core is obtained by compaction-forming magnetic powder. The magnetic powder is an alloy comprising 1-10 wt % Si, 0.1-1.0 wt % O, and balance Fe. An insulator comprising SiO2 and MgO as main components is interposed between powder particles having a particle size of 150 &mgr;m or less.
    Type: Grant
    Filed: July 29, 2003
    Date of Patent: September 7, 2004
    Assignee: NEC Tokin Corporation
    Inventors: Teruhiko Fujiwara, Masayoshi Ishii, Yoshitaka Saito
  • Publication number: 20040168303
    Abstract: An inductor component contains a drum magnetic core made of a magnetic material having a structure including integrated flanges at both ends of a columnar material, a coil wound around the columnar material in the drum magnetic core and placed between the flanges, and a permanent magnet placed in the neighborhood of the drum magnetic core with the coil wound around. This inductor component contains a sleeve core fitted to the outside of the drum magnetic core. The permanent magnet is placed in at least one gap in a closed magnetic circuit formed with the drum magnetic core and the sleeve core in order to apply a direct-current magnetic field in the direction opposite to the direction of a magnetic field generated by a magnetomotive force due to the coil.
    Type: Application
    Filed: March 1, 2004
    Publication date: September 2, 2004
    Applicant: NEC TOKIN CORPORATION
    Inventors: Hatsuo Matsumoto, Toru Ito, Masahiro Kondo, Ryutaro Isoda, Toshiya Sato, Tadakuni Sato, Teruhiko Fujiwara, Masayoshi Ishii, Haruki Hoshi
  • Publication number: 20040165338
    Abstract: A solid electrolytic capacitor comprising at least two capacitor elements using a valve action metal, such as tantalum or niobium, and laminated in a direction perpendicular to a mounting surface of a substrate. The capacitor elements have a width parallel to the mounting surface of the substrate greater than a thickness perpendicular to the mounting surface of the substrate, and an anode terminal is connected with anode leads led out to at least one side of an anode body made of the valve action metal generally in parallel to the mounting surface of the substrate. A cathode layer on a dielectric oxide film of the anode body is connected to a cathode terminal and is coated with exterior coating resin with a part of the anode terminal and a part of the cathode terminal exposed.
    Type: Application
    Filed: December 19, 2003
    Publication date: August 26, 2004
    Applicants: NEC TOKIN Corporation, NEC TOKIN Toyama, Ltd.
    Inventors: Shinji Arai, Takahiro Kayamori
  • Publication number: 20040160730
    Abstract: A chip-type capacitor includes a capacitor element, an encapsulation resin covering an entirety of the capacitor element, an anode terminal having a base portion whose bottom surface is exposed on a mounting surface of the encapsulation resin and a standing-up portion perpendicular to the base portion and having one end connected to the base portion and the other end welded to an anode lead wire led out from the capacitor element, and a cathode terminal fixed through a conductive adhesive to the capacitor element so as to expose a bottom surface on the mounting surface of the encapsulation resin. A depressed portion is formed on each of opposite side surfaces of the encapsulation resin, thereby partially exposing a top surface of each of the anode and the cathode terminals opposite to the bottom surface to form a terminal exposed portion exposed out of the encapsulation resin.
    Type: Application
    Filed: December 16, 2003
    Publication date: August 19, 2004
    Applicants: NEC TOKIN Corporation, NEC TOKIN Toyama, Ltd.
    Inventors: Makoto Tsutsui, Toshihisa Nagasawa
  • Patent number: 6778056
    Abstract: An inductance component comprises a magnetic core having at least one magnetic gap, means for generating a direct-current biased magnetic field produced by mounting a permanent magnet in the vicinity of a generally closed magnetic circuit which passes through the magnetic gap in the magnetic core or on the outside thereof, and a coil wound around the magnetic core, wherein the permanent magnet is mounted near the magnetic gap at one or more legs of the magnetic core which sandwich the magnetic gap.
    Type: Grant
    Filed: August 1, 2001
    Date of Patent: August 17, 2004
    Assignee: NEC Tokin Corporation
    Inventors: Toru Ito, Hatsuo Matsumoto, Teruhiko Fujiwara, Kazuyuki Okita, Toshiya Sato
  • Publication number: 20040157085
    Abstract: A ferrite film is formed by regularly arranging constituents such as magnetized grains or one analogous to that. In the ferrite film, the constituents have at least one of the uniaxial anisotropy and the multiaxial anisotropy. The ferrite film has the magnetic anisotropy or the magnetic isotropy. The ferrite film is formed by the use of the plating method in the presence of a magnetic field. Furthermore, an electromagnetic noise suppressor includes the ferrite film.
    Type: Application
    Filed: September 11, 2003
    Publication date: August 12, 2004
    Applicant: NEC TOKIN Corporation
    Inventors: Koichi Kondo, Okikuni Takahata, Tatsuya Chiba, Hiroshi Ono, Shigeyoshi Yoshida, Masanori Abe, Masahiro Yamaguchi
  • Patent number: 6775127
    Abstract: An anode member includes a tantalum foil (1) and a sintered member (2A, 2B) formed thereon. The sintered member has a double-layer structure including a lower sintered layer (2A1, 2B1) made of a first material powder having a high sinterability and an upper sintered layer (2A2, 2B2) made of a second material powder having a low sinterability. Sintering is performed at a temperature providing good porosity of the upper sintered layer and an over-sintered condition of the lower sintered layer. The first and the second material powders are same in raw material metal and different in average particle size or, alternatively, different in raw material metal and equal in average particle size. Alternatively, the sintered member (2C) has a single-layer structure including a sintered body of a powder mixture of the first and the second material powders.
    Type: Grant
    Filed: May 20, 2003
    Date of Patent: August 10, 2004
    Assignee: NEC Tokin Corporation
    Inventor: Katsuhiro Yoshida
  • Publication number: 20040151847
    Abstract: As an ornamental material, use is made of a single crystal represented by a chemical formula RVO4, where R is at least one rare earth element selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu.
    Type: Application
    Filed: December 23, 2003
    Publication date: August 5, 2004
    Applicant: NEC TOKIN CORPORATION
    Inventors: Hitoshi Itagaki, Hiroshi Machida
  • Publication number: 20040150942
    Abstract: In an anode member comprising a valve metal thin plate (1) and a valve metal powder layer (2) formed thereon and sintered, the valve metal powder layer is provided with a plurality of grid-like grooves (7) before it is sintered.
    Type: Application
    Filed: January 13, 2004
    Publication date: August 5, 2004
    Applicant: NEC TOKIN Corporation
    Inventor: Katsuhiro Yoshida
  • Publication number: 20040145065
    Abstract: In a chip type solid electrolytic capacitor including a capacitor element and a packaging resin covering the capacitor element, the packaging resin has a mount surface and a side surface adjacent to the mount surface. A terminal is electrically connected to the capacitor element and coupled to the packaging resin. The terminal extends along the mount surface and the side surface to have an outer surface exposed from the packaging resin and to have an inner surface opposite to the outer terminal surface. The inner surface has a stepwise shape formed by forging.
    Type: Application
    Filed: January 13, 2004
    Publication date: July 29, 2004
    Applicants: NEC TOKIN Corporation, NEC TOKIN Toyama, Ltd.
    Inventors: Mitsunori Sano, Takashi Kono, Makoto Tsutsui
  • Publication number: 20040141280
    Abstract: An electric double layer capacitor is disclosed which is capable of preventing transmission of an electrolytic solution vaporized in a basic cell through current collectors and capable of improving a yield. A method for preparing the electric double layer capacitor is also disclosed.
    Type: Application
    Filed: January 2, 2004
    Publication date: July 22, 2004
    Applicant: NEC TOKIN CORPORATION
    Inventors: Yutaka Nakazawa, Ryuichi Kasahara, Koji Sakata
  • Publication number: 20040140876
    Abstract: An inductor component is provided. The inductor component includes a core composed of a hollow core piece and a rod core piece, a bobbin, and bonded magnets. Regarding the hollow core piece and rod core piece, the rod core piece is arranged across the hollow core piece, and joining is performed between the bottom surfaces of both end portions of the rod core piece and the hollow core piece with bonded magnets therebetween.
    Type: Application
    Filed: December 16, 2003
    Publication date: July 22, 2004
    Applicant: NEC TOKIN CORPORATION
    Inventor: Masahiro Kondo
  • Patent number: 6765784
    Abstract: A solid electrolytic capacitor has an anode terminal and a cathode terminal for external electrical connection that are formed on one surface of a plate-like or foil-like anode member, and a cathode conductor layer formed such that it covers the area of the one surface of the anode member except for the portion where the anode terminal is secured. A first metal plate or metal foil functioning as the cathode terminal is closely joined to the one surface of the cathode conductor layer so as to cover the one surface of the cathode conductor layer. A second metal plate or metal foil is closely joined to the other surface of the cathode conductor layer so as to cover the other main surface of the cathode conductor layer. The first metal plate or metal foil and the second metal plate or metal foil function to intercept the ventilation between the anode member and the outside.
    Type: Grant
    Filed: February 20, 2003
    Date of Patent: July 20, 2004
    Assignee: NEC Tokin Corporation
    Inventors: Kazumasa Ohya, Satoshi Arai, Takayuki Inoi, Yoshihiko Saiki
  • Patent number: 6753751
    Abstract: An inductor component according to the present invention includes a magnetic core including at least one magnetic gap having a gap length of about 50 to 10,000 &mgr;m in a magnetic path, a magnet for magnetic bias arranged in the neighborhood of the magnetic gap in order to supply magnetic bias from both sides of the magnetic gap, and a coil having at least one turn applied to the magnetic core. The aforementioned magnet for magnetic bias is a bonded magnet containing a resin and a magnet powder dispersed in the resin and having a resistivity of 1 &OHgr;·cm or more. The magnet powder includes a rare-earth magnet powder having an intrinsic coercive force of 5 KOe or more, a Curie point of 300° C. or more, the maximum particle diameter of 150 &mgr;m or less, and an average particle diameter of 2.
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: June 22, 2004
    Assignee: NEC Tokin Corporation
    Inventors: Teruhiko Fujiwara, Masayoshi Ishii, Haruki Hoshi, Keita Isogai, Toru Ito, Tamiko Ambo