Patents Assigned to NEC Tokin Corporation
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Publication number: 20120276436Abstract: 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: ApplicationFiled: July 11, 2012Publication date: November 1, 2012Applicant: NEC TOKIN CORPORATIONInventors: Shinako Kaneko, Ryuichi Kasahara, Hiroshi Kobayashi, Yasutaka Kono, Toshihiko Nishiyama
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Patent number: 8295032Abstract: The present invention provides a solid electrolytic capacitor having sufficiently low impedance at high frequencies in which a conductive polymer formed on a dielectric oxide film has good adherence to the dielectric oxide film, and a manufacturing method of the solid electrolytic capacitor. The solid electrolytic capacitor of the present invention includes a valve metal; a dielectric oxide film layer formed on a surface of the valve metal; and a solid electrolyte layer, comprising a conductive polymer layer, formed on the dielectric oxide film layer. The conductive polymer layer contains, as an additive, 0.1 wt % to 30 wt % of an organic oligomer having an average degree of polymerization of 2 to 100.Type: GrantFiled: November 20, 2008Date of Patent: October 23, 2012Assignee: NEC Tokin CorporationInventors: Yasuhisa Sugawara, Masako Ohya, Kazuyuki Katoh
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Publication number: 20120262847Abstract: Provided is a solid electrolytic capacitor that is excellent in productivity, has improved volumetric efficiency aiming for capacity increase, a stable fillet shape when mounted, and has excellent ESL characteristics. Included is a capacitor stack element composed of a stack of capacitor elements. The capacitor element includes one anode part of an anode body made of linear, foil-like, or plate-like valve metal and a cathode part composed of dielectric, solid electrolyte, graphite, and silver paste layers, which are sequentially formed to another surface of the anode body separated by insulating resin. A fillet formation part with a recessed part is provided to an end surface of anode and cathode terminals of a mounting electrode side of a first direction end surface of the electrode substrate to which the capacitor stack element is mounted. Further, the anode and cathode terminals for element connection reach the end surface of the first direction.Type: ApplicationFiled: April 13, 2012Publication date: October 18, 2012Applicant: NEC TOKIN CorporationInventors: Akihiro KAWAI, Kenji Araki
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Patent number: 8287665Abstract: A soft magnetic alloy contains P, B, and Cu as essential components. As a preferred example, an Fe-based alloy contains Fe of 70 atomic % or more, B of 5 atomic % to 25 atomic %, Cu of 1.5 atomic % or less (excluding zero), and P of 10 atomic or less (excluding zero).Type: GrantFiled: March 19, 2008Date of Patent: October 16, 2012Assignees: NEC Tokin Corporation, Tohoku UniversityInventors: Akiri Urata, Hiroyuki Matsumoto, Akihiro Makino
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Patent number: 8289677Abstract: 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: GrantFiled: July 28, 2009Date of Patent: October 16, 2012Assignee: NEC Tokin CorporationInventors: Ryuta Kobayakawa, Tomoki Nobuta, Naoki Takahashi, Yasuhisa Sugawara, Satoshi Suzuki, Toshihiko Nishiyama
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Patent number: 8279582Abstract: 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: GrantFiled: July 28, 2009Date of Patent: October 2, 2012Assignee: NEC Tokin CorporationInventors: Tomoki Nobuta, Ryuta Kobayakawa, Naoki Takahashi, Yasuhisa Sugawara, Satoshi Suzuki, Toshihiko Nishiyama
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Publication number: 20120199254Abstract: An alloy composition of Fe(100-X-Y-Z)BXPYCuz, where 4?X?14 atomic %, 0<Y?10 atomic %, and 0.5?Z?2 atomic %. This alloy composition has an amorphous phase as a main phase. This alloy composition is used as a starting material and exposed to a heat-treatment so that nanocrystals comprising no more than 25 nm of bccFe can be crystallized. Thus, an Fe-based nano-crystalline alloy having superior magnetic properties can be obtained.Type: ApplicationFiled: July 20, 2010Publication date: August 9, 2012Applicants: TOHOKU UNIVERSITY, NEC TOKIN CORPORATIONInventors: Akiri Urata, Yasunobu Yamada, Hiroyuki Matsumoto, Shigeyoshi Yoshida, Akihiro Makino
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Publication number: 20120198936Abstract: A piezoelectric acceleration sensor comprises a piezoelectric element, a metallic sheet and a circuit board. The piezoelectric element is polarized in a predetermined direction. The circuit board includes a circuit portion and a roughly flat shaped base portion. The base portion protrudes from an end portion of the circuit portion. One of surfaces of the metallic sheet is fixed to and supported by a surface of the base portion. The piezoelectric element is fixed to and supported by a remaining one of the surfaces of the metallic sheet in a manner that the piezoelectric element and the base portion do not overlap each other in the predetermined direction.Type: ApplicationFiled: September 28, 2010Publication date: August 9, 2012Applicant: NEC TOKIN CORPORATIONInventor: Masuto Saito
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Patent number: 8215003Abstract: 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: GrantFiled: August 4, 2009Date of Patent: July 10, 2012Assignees: Denso Corporation, NEC Tokin CorporationInventors: Kenji Saka, Yousuke Setaka, Hiroyuki Katsuta, Takashi Yanbe
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Patent number: 8213160Abstract: A solid electrolytic capacitor including a solid electrolytic capacitor component comprises a porous anode body 2 composed of valve metal having a anode lead 1 protruding therefrom, a anode oxide film, a solid electrolyte layer 4, a graphite layer 5, a silver paste layer 6, a resist layer 3 separating the anode lead 1 used as a anode portion and the porous anode body 2 used as a cathode portion, and a anode lead element 7 connected to the anode lead 1, the anode oxide film, solid electrolyte layer 4, graphite layer 5, silver paste layer 6 being successively formed on the surface of the porous anode body 2, wherein the solid electrolytic capacitor component is bonded on a mounting substrate 21 having a anode terminal 21a, a cathode terminal 21b, and an insulating portion 21c therebetween with a precuring insulating adhesive 9 formed on the insulating portion 21c of the mounting substrate 21 and precuring conductive adhesives 8 formed on the anode terminal and cathode terminal, and sealed with exterior resin 10Type: GrantFiled: March 13, 2008Date of Patent: July 3, 2012Assignee: NEC Tokin CorporationInventors: Takeshi Saito, Yuji Yoshida, Takeo Kasuga, Koji Sakata, Katsuhiro Yoshida, Masanori Takahashi
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Patent number: 8164001Abstract: A multilayer printed circuit board includes an inner magnetic layer essentially consisting of magnetic material. The inner magnetic layer may be formed by an action of chemical bond or van der Waals force. The inner magnetic layer may comprise a plurality of magnetic units, each of which provides magnetism, and may be formed by magnetically coupling the magnetic units with each other by using a strong interaction. The inner magnetic layer may essentially consist of a ferrite film. The ferrite film may be formed directly on the inner conductive layer by means of an electroless plating method. The ferrite film may essentially consist of an oxide metal composition, the metal composition being represented by the formula of FeaNibZncCod, where: a+b+c+d=3.0; 2.1?a?2.7; 0.1?b?0.3; 0.1?c?0.7; and 0?d?0.15.Type: GrantFiled: November 21, 2007Date of Patent: April 24, 2012Assignee: NEC Tokin CorporationInventors: Shigeyoshi Yoshida, Koichi Kondo, Hiroshi Ono, Satoshi Arai, Tadashi Kubodera
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Patent number: 8164884Abstract: In a solid electrolytic capacitor including a porous valve-acting metal, an anode conductor has a large number of pores having openings on the surface thereof according to the porosity of the valve-acting metal. A solid electrolyte layer is formed on the surface of the anode conductor so as to be filled in at least a portion of each of the pores and to close the openings thereof. Further, a cathode conductor is formed on the solid electrolyte layer. Preferably, the solid electrolyte layer has a two-layer structure with two layers having different particle sizes.Type: GrantFiled: October 28, 2008Date of Patent: April 24, 2012Assignee: NEC TOKIN CorporationInventors: Tomoki Nobuta, Naoki Takahashi, Ryuta Kobayakawa, Satoshi Suzuki, Toshihiko Nishiyama
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Publication number: 20120045685Abstract: To provide an electric storage device whose negative electrode can be doped with lithium ions in a short time and whose resistance can be lowered. An electric storage device including a unit that is obtained by alternately stacking a positive-electrode sheet 9 and a negative-electrode sheet 10 with a separator 3 interposed therebetween, the positive electrode sheet 9 including a positive-electrode active material layer 1 and a positive-electrode charge collector 4, and the negative electrode sheet 10 including a negative-electrode active material layer 2 and a negative-electrode charge collector 5, in which a foil, an etching foil, or a porous lath foil is used as the positive-electrode charge collector 4 and the negative-electrode charge collector 5, a cut is made in a coating area of the positive-electrode active material layer 1 and the negative-electrode active material layer 2, and a lithium supply source is disposed so as to be opposed to the negative electrode sheet 10 of the unit.Type: ApplicationFiled: April 5, 2011Publication date: February 23, 2012Applicant: NEC Tokin CorporationInventors: Daisuke Seki, Yukinori Hato, Masako Ooya, Katsuhiro Yoshida, Risa Miyagawa, Kouji Maeda
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Publication number: 20120044615Abstract: A solid electrolytic capacitor according to an aspect of the present invention includes an anode conductor including a porous valve metal body, a dielectric layer formed on a surface of the anode conductor, and a solid electrolyte layer including a conductive polymer layer formed on a surface of the dielectric layer, in which the solid electrolyte layer includes a first solid electrolyte layer formed on a surface of the dielectric layer, and a second solid electrolyte layer formed on a surface of the first solid electrolyte layer, and at least one continuous or discontinuous layer containing an amine compound exists between the first and second solid electrolyte layers, and inside the second solid electrolyte layer.Type: ApplicationFiled: August 8, 2011Publication date: February 23, 2012Applicant: NEC TOKIN CORPORATIONInventors: Masanori TAKAHASHI, Satoshi IWAI, Masami ISHIJIMA
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Publication number: 20120032301Abstract: A semiconductor device includes a lead frame including an island, a power supply lead, and a GND lead; a sheet-like solid electrolytic capacitor that is mounted on the island; a semiconductor chip that is mounted on the solid electrolytic capacitor, a plane area of the semiconductor chip being smaller than that of the solid electrolytic capacitor; a bonding wire that connects the semiconductor chip and the solid electrolytic capacitor, and a bonding wire that connects the solid electrolytic capacitor and the power supply lead or the GND lead, in which at least the connection part between the anode plate and the anode part of the solid electrolytic capacitor and the connection part between the anode plate and the bonding wire do not overlap when being vertically projected.Type: ApplicationFiled: August 4, 2011Publication date: February 9, 2012Applicant: NEC TOKIN CORPORATIONInventors: Takeo KASUGA, Koji SAKATA, Takeshi SAITO
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Patent number: 8107224Abstract: In a thin solid electrolytic capacitor including a solid electrolytic capacitor element disposed on a substrate, the solid electrolytic capacitor element has an upper surface largely extending along the substrate as compared with a height dimension thereof from the substrate. A casing portion is at least partly made of a resin and surrounds the solid electrolytic capacitor element jointly with the substrate. The casing portion includes a non-adhesive member that is in contact with an upper surface of the solid electrolytic capacitor element, but is not adhesive to the solid electrolytic capacitor element.Type: GrantFiled: May 19, 2008Date of Patent: January 31, 2012Assignee: NEC TOKIN CorporationInventors: Masanori Takahashi, Takeshi Saito, Takeo Kasuga, Yuji Yoshida, Katsuhiro Yoshida, Koji Sakata
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Patent number: 8107646Abstract: In an acoustic vibration generating element, a piezoelectric bimorph element or unimorph element is covered with a covering member of a flexible material at least on two surfaces perpendicular to a thickness direction. The covering member may be provided with a plurality of V-shaped grooves so as to improve a generated vibrating force. Alternatively, the covering member may be provided with an air chamber in the vicinity of a surface of one side so as to prevent sound leakage. Further, the covering member and an earhook may be integrally formed by the flexible material so as to achieve a light-weight acoustic vibration generating element suitable for a bone conduction speaker.Type: GrantFiled: December 20, 2007Date of Patent: January 31, 2012Assignee: NEC TOKIN CorporationInventor: Mitsuo Tamura
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Publication number: 20110318637Abstract: 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: ApplicationFiled: September 2, 2011Publication date: December 29, 2011Applicant: NEC TOKIN CORPORATIONInventors: Takehiro Noguchi, Masaaki Matsuu, Ryuichi Kasahara, Tatsuji Numata, Yutaka Bannai
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Publication number: 20110292626Abstract: In a lower-face electrode type solid electrolytic multilayer capacitor and a mounting member having the same according to the present invention, fillet forming portions are formed by forming an electrode substrate cutting portion at a predetermined portion of an edge face in longer direction or in shorter direction of an electrode substrate, and a covering resin cutting portion on an edge face of a covering resin in a staircase pattern so that the electrode substrate cutting portion is surrounded by the covering resin cutting portion. According to the present invention, it is possible to provide the lower-face electrode type solid electrolytic multilayer capacitor and the mounting member having the same, in which the productivity is excellent, the volume efficiency can be improved to achieve the high capacitance, and the stable fillet can be formed on mounting.Type: ApplicationFiled: November 19, 2010Publication date: December 1, 2011Applicant: NEC TOKIN CORPORATIONInventors: Akihiro KAWAI, Kenji ARAKI
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Patent number: 8038738Abstract: A solid electrolytic capacitor manufacturing method includes a process of removing a roughened surface layer (10a?) from a distal portion (13) of a metal member (10) and from part of an intermediate portion (12) adjacent to the distal portion (13), a process of forming a resist (40) on the distal portion (13) and the intermediate portion (12) of the metal member (10), a process of forming a conductive polymer layer (30) of a conductive polymer on a proximal portion (11) of the metal member (10), and a process of removing a resist (40?) and a surface layer portion (13?) of the metal member (10) from the distal portion (13) of the metal member (10).Type: GrantFiled: October 31, 2008Date of Patent: October 18, 2011Assignee: NEC Tokin CorporationInventors: Naoki Takahashi, Toshihiko Nishiyama, Satoshi Suzuki, Ryuta Kobayakawa, Tomoki Nobuta