Patents by Inventor Katsuhiro Yoshida

Katsuhiro Yoshida has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20080218943
    Abstract: A solid electrolytic capacitor is provided which is capable of exhibiting an excellent characteristic and high reliability against thermal stress. The solid electrolytic capacitor includes a base member having a capacitor element connecting face on its upper surface side and an electrode mounting face on its lower surface side and being made up of an insulating plate having first conductors and second conductors, disposed in a staggered format, each providing conduction between the upper and lower surface sides of the base member, and the capacitor element having anode portions and cathode portions, each being disposed in a staggered format, connected to each of the first and second conductors.
    Type: Application
    Filed: March 5, 2008
    Publication date: September 11, 2008
    Inventors: Koji SAKATA, Takeshi Saito, Yuji Yoshida, Takeo Kasuga, Masanori Takahashi, Katsuhiro Yoshida
  • Publication number: 20080123252
    Abstract: A solid electrolytic capacitor comprising: 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: Application
    Filed: November 27, 2007
    Publication date: May 29, 2008
    Applicant: NEC TOKIN CORPORATION
    Inventors: Takeo Kasuga, Yuji Yoshida, Masanori Takahashi, Ryuta Kobayakawa, Takeshi Saito, Koji Sakata, Sadamu Toita, Katsuhiro Yoshida
  • Patent number: 7379290
    Abstract: An electrically conductive polymer composition contains an electrically conductive polymer obtained by using a polymer in the form of cations composed of repeating structural units of 3,4-ethylene dioxythiophene and polystyrene sulfonic acid as anions and further contains naphthalene sulfonic acid as an additive. A solid electrolytic capacitor 101 or a surface-mount transmission line element 102 has a polypyrrole conductive polymer layer 3 as a first solid electrolyte and a poly(3,4-ethylene dioxythiophene) conductive polymer layer 4 as a second solid electrolyte.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: May 27, 2008
    Assignee: NEC TOKIN Corporation
    Inventors: Sadamu Toida, Shinji Arai, Kenji Araki, Katsuhiro Yoshida, Tadamasa Asami, Takeshi Saitou, Yuuichi Maruko
  • Patent number: 7355835
    Abstract: A capacitor has stacking capacitor elements, each of which contains a conductor plate, a first band being an insulator and disposed around the plate, a second band being an insulator and disposed around the plate so as to be substantially parallel to the first band, an insulating coating covering a region sandwiched between the first and second bands, a cathode layer formed on the insulating coating, and an anode containing the plate and formed on an outer side of at least one of the first and second bands. The cathode layers are elctrically connected to each other through paths each connecting in series the facing two cathode layers of the adjacent two elements and path(s) connecting in parallel the cathode layers to each other, and the anodes are electrically connected to each other through path(s) connecting in parallel the anodes to each other.
    Type: Grant
    Filed: May 20, 2006
    Date of Patent: April 8, 2008
    Assignee: NEC TOKIN Corporation
    Inventors: Takeshi Saitou, Hitoshi Takata, Katsuhiro Yoshida
  • Patent number: 7317610
    Abstract: A sheet-shaped capacitor for storing electrical charges of large capacities, and to assure facilitated manufacture, cost reduction and improved reliability, and a method for manufacturing the capacitor. The capacitor includes a dielectric film 12, formed on a first major surface of a metal plate 11, an electrically conductive high polymer layer 13, formed on a first major surface of the dielectric film, and an electrically conductive layer 14 formed on a first major surface of the electrically conductive high polymer layer 13, such as by copper plating. A cathode electrode 20 is led out from the electrically conductive layer 14 on the side electrically conductive high polymer layer 13.
    Type: Grant
    Filed: November 15, 2005
    Date of Patent: January 8, 2008
    Assignees: NEC Toppan Circuit Solutions, Inc., NEC Tokin Corporation
    Inventors: Hirofumi Nakamura, Yutaka Akimoto, Sadamu Toita, Takayuki Inoi, Katsuhiro Yoshida
  • Publication number: 20070297121
    Abstract: In a method of manufacturing a solid electrolytic capacitor, at first, an anodic oxide film is formed on the surface of an aluminum base. Then, a solid electrolyte layer is formed of a conductive polymer or the like on the anodic oxide film. Then, a cathode electrode portion including a silver paste layer is formed on the solid electrolyte layer. Then, a conductive paste is coated on the anodic oxide film on one side of the aluminum base and cured, thereby forming a metal silver layer. Then, a laser beam is irradiated from the opposite side of the aluminum base to weld together the aluminum base and the metal silver layer, thereby forming an anode electrode portion.
    Type: Application
    Filed: June 18, 2007
    Publication date: December 27, 2007
    Inventors: Yuji Yoshida, Katsuhiro Yoshida
  • Patent number: 7312978
    Abstract: An electrically conductive polymer composition contains an electrically conductive polymer obtained by using a polymer in the form of cations composed of repeating structural units of 3,4-ethylene dioxythiophene and polystyrene sulfonic acid as anions and further contains naphthalene sulfonic acid as an additive. A solid electrolytic capacitor 101 or a surface-mount transmission line element 102 has a polypyrrole conductive polymer layer 3 as a first solid electrolyte and a poly(3,4-ethylene dioxythiophene) conductive polymer layer 4 as a second solid electrolyte.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: December 25, 2007
    Assignee: NEC TOKIN Corporation
    Inventors: Sadamu Toida, Shinji Arai, Kenji Araki, Katsuhiro Yoshida, Tadamasa Asami, Takeshi Saitou, Yuuichi Maruko
  • Publication number: 20070242994
    Abstract: An image processing apparatus according to this invention has an apparatus body containing an image forming part, an opening/closing member attached to be openable/closable about an opening/closing shaft via a hinge with respect to an upper surface of the apparatus body, a detecting part that detects an opening/closing state of the opening/closing member, a scanner part arranged in an upper part of the apparatus body and arranged to be slidable horizontally, and a driving part that slides the scanner part in accordance with the opening/closing state of the opening/closing member from the detecting part.
    Type: Application
    Filed: April 18, 2006
    Publication date: October 18, 2007
    Applicants: Kabushiki Kaisha Toshiba, Toshiba Tec Kabushiki Kaisha
    Inventors: Hisaya Ishio, Katsuhiro Yoshida
  • Patent number: 7268997
    Abstract: An aluminum solid electrolytic capacitor (conductive polymer type solid electrolytic capacitor) has an anodic oxide film layer, a conductive polymer layer, and a polystyrene sulfonate layer interposed between the anodic oxide film layer and the conductive polymer layer. A transmission line element has a cathode portion formed on a central portion of an aluminum substrate in an aluminum solid electrolytic capacitor. The transmission line element also has a pair of anode terminal areas located at both sides of the cathode portion on the aluminum substrate and is configured to supply a current between the pair of anode terminal areas.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: September 11, 2007
    Inventors: Takeshi Saitou, Takeo Kasuga, Katsuhiro Yoshida, Sadamu Toida
  • Publication number: 20070159771
    Abstract: On a surface-roughened aluminum foil, an aluminum oxide film as an anodic oxide film is formed. Then, a conductive polymer layer as a solid electrolyte is formed thereon and thereafter a first metal plating layer is directly formed on the conductive polymer layer, thereby forming a cathode portion. On the other hand, a second metal plating layer is formed on another portion of the surface-roughened aluminum foil, which is not subjected to anodic oxidation or which is subjected to anodic oxidation followed by polishing or formation of an anode deposition film, to thereby form an anode portion. Third metal plating layers are formed at the anode and the cathode portions to obtain a capacitor element. A plurality of capacitor elements are stacked and bonded together fusion after formation of the third metal plating layers. Alternatively the capacitor elements may be bonded together by conductive paste without the third metal layers.
    Type: Application
    Filed: March 15, 2007
    Publication date: July 12, 2007
    Applicant: NEC TOKIN Corporation
    Inventors: Takeshi SAITO, Sadamu Toita, Katsuhiro Yoshida
  • Patent number: 7215534
    Abstract: On a surface-roughened aluminum foil, an aluminum oxide film as an anodic oxide film is formed. Then, a conductive polymer layer as a solid electrolyte is formed thereon and thereafter a first metal plating layer is directly formed on the conductive polymer layer, thereby forming a cathode portion. On the other hand, a second metal plating layer is formed on another portion of the surface-roughened aluminum foil, which is not subjected to anodic oxidation or which is subjected to anodic oxidation followed by polishing or formation of an anode deposition film, to thereby form an anode portion. Third metal plating layers are formed at the anode and the cathode portions to obtain a capacitor element. A plurality of capacitor elements are stacked and bonded together by fusion after formation of the third metal plating layers. Alternatively, the capacitor elements may be bonded together by a conductive paste without the third metal layers.
    Type: Grant
    Filed: June 21, 2005
    Date of Patent: May 8, 2007
    Assignee: NEC Tokin Corporation
    Inventors: Takeshi Saito, Sadamu Toita, Katsuhiro Yoshida
  • Publication number: 20070047178
    Abstract: An aluminum solid electrolytic capacitor (conductive polymer type solid electrolytic capacitor) has an anodic oxide film layer, a conductive polymer layer, and a polystyrene sulfonate layer interposed between the anodic oxide film layer and the conductive polymer layer. A transmission line element has a cathode portion formed on a central portion of an aluminum substrate in an aluminum solid electrolytic capacitor. The transmission line element also has a pair of anode terminal areas located at both sides of the cathode portion on the aluminum substrate and is configured to supply a current between the pair of anode terminal areas.
    Type: Application
    Filed: August 22, 2006
    Publication date: March 1, 2007
    Inventors: Takeshi Saitou, Takeo Kasuga, Katsuhiro Yoshida, Sadamu Toida
  • Publication number: 20060262490
    Abstract: A capacitor has stacking capacitor elements, each of which contains a conductor plate, a first band being an insulator and disposed around the plate, a second band being an insulator and disposed around the plate so as to be substantially parallel to the first band, an insulating coating covering a region sandwiched between the first and second bands, a cathode layer formed on the insulating coating, and an anode containing the plate and formed on an outer side of at least one of the first and second bands. The cathode layers are elctrically connected to each other through paths each connecting in series the facing two cathode layers of the adjacent two elements and path(s) connecting in parallel the cathode layers to each other, and the anodes are electrically connected to each other through path(s) connecting in parallel the anodes to each other.
    Type: Application
    Filed: May 20, 2006
    Publication date: November 23, 2006
    Inventors: Takeshi Saitou, Hitoshi Takata, Katsuhiro Yoshida
  • Publication number: 20060256507
    Abstract: In a solid electrolytic capacitor including a device portion having a cathode conductor layer and an anode conductor layer arranged on a sheet-like or a foil-like base member, a first insulating resin layer is formed on the cathode conductor layer and the anode conductor layer. A positive electrode mounting terminal layer is formed on the first insulating resin layer. An anode conductor portion penetrates the first insulating resin layer to electrically connect the positive electrode mounting terminal layer to the anode conductor layer. A plurality of negative electrode mounting terminal layers are arranged on the first insulating resin layer. A cathode conductor portion penetrates the first insulating resin layer to electrically connect the negative electrode mounting terminal layer to the cathode conductor layer. A second insulating resin layer is formed on the positive electrode mounting terminal layer.
    Type: Application
    Filed: May 5, 2006
    Publication date: November 16, 2006
    Inventors: Katsuhiro Yoshida, Koji Sakata
  • Publication number: 20060193105
    Abstract: The capacitor element includes as an anode an aluminum foil in the form of a thin plate, an oxide layer formed as a dielectric on the surface of the anode, and a conductive polymer layer formed as a cathode on the dielectric. The capacitor is formed by drawing terminals in arrays from the capacitor element. On the upper side of the capacitor element is provided an embossed copper foil 11 for suppressing deformation of the capacitor element. The anode terminals and the cathode terminals are drawn to the lower side of the capacitor element. The anode terminals and the cathode terminals are alternately formed at the same pitch in the x-direction and the y-direction, so that the heteropolar terminals are disposed at the adjacent positions with respect to any one of the terminals.
    Type: Application
    Filed: February 22, 2006
    Publication date: August 31, 2006
    Applicant: NEC TOKIN Corporation
    Inventors: Koji Sakata, Katsuhiro Yoshida, Yoshitaka Hori, Tomohide Date
  • Publication number: 20060187617
    Abstract: An electrically conductive polymer composition contains an electrically conductive polymer obtained by using a polymer in the form of cations composed of repeating structural units of 3,4-ethylene dioxythiophene and polystyrene sulfonic acid as anions and further contains naphthalene sulfonic acid as an additive. A solid electrolytic capacitor 101 or a surface-mount transmission line element 102 has a polypyrrole conductive polymer layer 3 as a first solid electrolyte and a poly(3,4-ethylene dioxythiophene) conductive polymer layer 4 as a second solid electrolyte.
    Type: Application
    Filed: February 17, 2006
    Publication date: August 24, 2006
    Inventors: Sadamu Toida, Shinji Arai, Kenji Araki, Katsuhiro Yoshida, Tadamasa Asami, Takeshi Saitou, Yuuichi Maruko
  • Publication number: 20060120014
    Abstract: A sheet-shaped capacitor for storing electrical charges of large capacities, and to assure facilitated manufacture, cost reduction and improved reliability, and a method for manufacturing the capacitor. The capacitor includes a dielectric film 12, formed on a first major surface of a metal plate 11, an electrically conductive high polymer layer 13, formed on a first major surface of the dielectric film, and an electrically conductive layer 14 formed on a first major surface of the electrically conductive high polymer layer 13, such as by copper plating. A cathode electrode 20 is led out from the electrically conductive layer 14 on the side electrically conductive high polymer layer 13.
    Type: Application
    Filed: November 15, 2005
    Publication date: June 8, 2006
    Applicants: NEC Toppan Circuit Solutions, INC., NEC Tokin Corporation
    Inventors: Hirofumi Nakamura, Yutaka Akimoto, Sadamu Toita, Takayuki Inoi, Katsuhiro Yoshida
  • Publication number: 20060028787
    Abstract: The electrolytic capacitor and the electric double-layer capacitor both have difficulties to satisfy recent demands that the capacitor should have lower resistance, larger capacitance and moreover smaller size and thinner film thickness, altogether. The present invention provides a wet electrolytic capacitor which comprises a porous anode substance wherein at least a surface of a porous material made of a powder of a valve metal is an oxide film of the valve metal, a cathode formed of either an active carbon layer or a porous material made of a powder of a valve metal and an acid electrolytic solution contained between the porous anode substance and the cathode electrode.
    Type: Application
    Filed: August 8, 2005
    Publication date: February 9, 2006
    Inventors: Katsuhiro Yoshida, Yoshihiko Saiki, Hiroyuki Kamisuki, Masahiro Murata
  • Patent number: D570283
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: June 3, 2008
    Assignee: NEC TOKIN Corporation
    Inventors: Katsuhiro Yoshida, Kazuyuki Katoh, Kunihiko Shimizu
  • Patent number: D570284
    Type: Grant
    Filed: April 5, 2007
    Date of Patent: June 3, 2008
    Assignee: NEC Tokin Corporation
    Inventors: Katsuhiro Yoshida, Koji Sakata, Kazuyuki Katoh