Patents by Inventor Takahisa Iida

Takahisa Iida 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: 20110120754
    Abstract: A multilayer wiring board includes: a rigid portion including a first base member having flexibility and surfaces, the first base member having a first insulating layer and a first conductor layer, and a second base member bonded on at least one of the surfaces of the first base member and having rigidity higher than that of the first base member, the second base member having a second insulating layer and a second conductor layer; and a flexible portion provided so as to be continuously extended from the rigid portion, the flexible portion constituted from the first base member, wherein in the case where a coefficient of thermal expansion of the second insulating layer is measured by a thermal mechanical analysis based on JIS C 6481 at a predetermined temperature, the coefficient of thermal expansion of the second insulating layer in a plane direction thereof is 13 ppm/° C. or lower and the coefficient of thermal expansion of the second insulating layer in a thickness direction thereof is 20 ppm/° C.
    Type: Application
    Filed: September 13, 2007
    Publication date: May 26, 2011
    Applicant: SUMITOMO BAKELITE COMPANY LIMITED
    Inventors: Masayoshi Kondo, Masaaki Kato, Toshiaki Chuma, Toshio Komiyatani, Takahisa Iida, Kenichi Kanemasa
  • Patent number: 7800887
    Abstract: A solid electrolytic capacitor, having a small equivalent series resistance, is formed by burying a capacitor element inside an epoxy resin outer package. The capacitor element includes an anode, having part of an anode lead buried therein, a dielectric layer formed on the anode and containing a niobium oxide, and a cathode formed on the dielectric layer. The cathode includes a first electrolyte layer containing a conductive polymer and formed on the dielectric layer, an intermediate layer containing an organic silane and formed on the first electrolyte layer, a second electrolyte layer containing a conductive polymer and formed on the intermediate layer, a first conductive layer containing carbon particles and formed on the second electrolyte layer, and a second conductive layer containing silver particles and formed on the first conductive layer.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: September 21, 2010
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Takahisa Iida, Mutsumi Yano, Takashi Umemoto, Hiroshi Nonoue
  • Patent number: 7742282
    Abstract: In this solid electrolytic capacitor, a plate-shaped anode having a porous sintered body, a dielectric layer and an electrolyte layer of polypyrrole are formed in this order for covering one part of an anode lead. An intermediate layer of aminopropyltriethoxysilane (APTES) is formed for covering the electrolyte layer. A cathode having a first conductive layer containing graphite particles and a second conductive layer containing silver particles is formed for covering the intermediate layer. The cathode and a cathode terminal are connected by a conductive adhesive layer. The anode lead and the anode terminal are connected by welding. Further, a mold outer resin is formed to allow one end of the cathode terminal and one end of the anode terminal to project therefrom.
    Type: Grant
    Filed: January 23, 2006
    Date of Patent: June 22, 2010
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Takahisa Iida, Mutsumi Yano, Mamoru Kimoto
  • Patent number: 7599170
    Abstract: In a solid electrolytic capacitor of the present invention, a virtually plate-like anode having a porous sintered body, a dielectric layer, and an electrolyte layer are sequentially formed on an anode lead so as to cover a portion of the anode lead. A cathode includes a first electrically conductive layer containing graphite particles having a grain size of approximately 1 ?m to approximately 10 ?m and APTES; and a second electrically conductive layer including silver particles is formed on the electrolyte layer so as to cover an area surrounding the electrolyte layer. Also, the cathode and a cathode terminal are interconnected through an electrically conductive adhesive layer, and the anode lead and an anode terminal are welded to each other. Further, a mold-packaging resin is formed such that respective edges of the cathode terminal and the anode terminal are located outside the mold-packaging resin.
    Type: Grant
    Filed: May 23, 2006
    Date of Patent: October 6, 2009
    Assignee: SANYO Electric Co., Ltd.
    Inventor: Takahisa Iida
  • Patent number: 7593216
    Abstract: A solid electrolytic capacitor includes a capacitor element having a niobium oxide layer arranged between an anode and a cathode, and an outer package covering the capacitor element. The niobium oxide layer contains fluorine and phosphorus, and the outer package contains epoxy resin, phenol resin, filler and an imidazole compound.
    Type: Grant
    Filed: May 29, 2007
    Date of Patent: September 22, 2009
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kazuhiro Takatani, Mutsumi Yano, Hiroaki Izu, Takahisa Iida, Takashi Umemoto, Hiroshi Nonoue
  • Patent number: 7561409
    Abstract: A solid electrolytic capacitor element includes a first oxide layer formed on an anode. The solid electrolytic capacitor further includes a second oxide layer formed on the first oxide layer, and a cathode formed on the second oxide layer. The first oxide layer includes Nb2O5 and the second oxide layer includes NbOx (1?x ?2).
    Type: Grant
    Filed: August 28, 2006
    Date of Patent: July 14, 2009
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Takahisa Iida, Mutsumi Yano, Takashi Umemoto, Hiroshi Nonoue
  • Patent number: 7489498
    Abstract: A capacitor element comprises an anode, a dielectric layer formed on the anode, an electrolyte layer formed on the dielectric layer, and a cathode formed on the electrolyte layer. On the cathode formed by the surface of the capacitor element, a conductive adhesive layer containing silver particles and an organic silane layer made from aminopropyltriethoxysilane (APTES) are sequentially formed, and the cathode and a cathode terminal are connected through the conductive adhesive layer and the organic silane layer. In addition, an anode terminal is connected to an anode lead which exposed from the anode by welding.
    Type: Grant
    Filed: August 29, 2006
    Date of Patent: February 10, 2009
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Hiroaki Izu, Takahisa Iida, Mutsumi Yano, Mamoru Kimoto
  • Publication number: 20080316680
    Abstract: The present invention is to provide a solid electrolytic capacitor having a small equivalent series resistance. In this solid electrolytic capacitor, a capacitor element is buried inside of an outer package of an epoxy resin or the like, the capacitor element including an anode in which a part of an anode lead is buried, a dielectric layer which is formed on the anode and contains a niobium oxide and a cathode which is formed on the dielectric layer. The cathode includes a first electrolyte layer which is formed on the dielectric layer and contains a conductive polymer, an intermediate layer which is formed on the first electrolyte layer and contains organic silane, a second electrolyte layer which is formed on the intermediate layer and contains a conductive polymer, a first conductive layer which is formed on the second electrolyte layer and contains carbon particles and a second conductive layer which is formed on the first conductive layer and contains silver particles.
    Type: Application
    Filed: August 28, 2007
    Publication date: December 25, 2008
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Takahisa Iida, Mutsumi Yano, Takashi Umemoto, Hiroshi Nonoue
  • Publication number: 20080239630
    Abstract: The present invention provides an electrolytic capacitor having a large electrostatic capacity. In the solid electrolytic capacitor, a capacitor element provided with; an anode in which a part of an anode lead is embedded in the inside of an outer package made of an epoxy resin or the like; an oxide layer containing niobium oxide formed on the anode; and a cathode formed on the oxide layer; is embedded. The anode lead is composed of a niobium alloy containing at least one of vanadium and zirconium, and its one end is embedded in the anode composed of a porous sintered body of metal particles containing niobium, and the other end is connected to an anode terminal. The cathode is composed of a conductive polymer layer such as polypyrrole, a first conductive layer containing carbon particles, and a second conductive layer containing silver particles, and one end of a cathode terminal is connected to the cathode via a third conductive layer containing silver particles.
    Type: Application
    Filed: August 10, 2007
    Publication date: October 2, 2008
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Hiroaki Izu, Takahisa Iida, Mutsumi Yano, Takashi Umemoto, Hiroshi Nonoue
  • Publication number: 20080047116
    Abstract: Provided is a method of producing an electrolytic capacitor being higher in capacitance, lower in leakage current, and difficult to deteriorate these properties even when processed in a heat-treatment process such as reflow soldering process. In the method of producing a solid electrolytic capacitor, firstly, an anode containing a valve metal is prepared. Then, the anode is anodized in an aqueous solution of 0.1% by weight of ammonium hexafluorosilicate to form a dielectric layer on the surface of the anode. An electrolyte layer of polypyrrole is formed on the dielectric layer, and further a cathode is formed on the electrolyte layer. Subsequently, an anode lead is connected to the anode and a cathode lead is connected to the cathode, and these are covered with a resin layer of an epoxy resin.
    Type: Application
    Filed: July 25, 2007
    Publication date: February 28, 2008
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Kazuhiro TAKATANI, Takahisa Iida, Takashi Umemoto, Hiroshi Nonoue
  • Publication number: 20070285876
    Abstract: A solid electrolytic capacitor includes a capacitor element having a niobium oxide layer arranged between an anode and a cathode, and an outer package covering the capacitor element. The niobium oxide layer contains fluorine and phosphorus, and the outer package contains epoxy resin, phenol resin, filler and an imidazole compound.
    Type: Application
    Filed: May 29, 2007
    Publication date: December 13, 2007
    Applicant: SANYO ELECTRIC CO., LTD.
    Inventors: Kazuhiro Takatani, Mutsumi Yano, Hiroaki Izu, Takahisa Iida, Takashi Umemoto, Hiroshi Nonoue
  • Patent number: 7262954
    Abstract: The objective of the current invention is to provide a solid electrolytic capacitor element with low equivalent series resistance. In this solid electrolytic capacitor element, an anode including a porous sintered body, and a dielectric layer are sequentially formed on an anode lead so as to cover a portion of the anode lead. An intermediate layer including polyethylene glycol is formed on the dielectric layer so as to cover an area around the dielectric layer. An electrolyte layer that includes polypyrrole is formed on the intermediate layer so as to cover an area around the intermediate layer. A cathode that includes: a first electrically conductive layer mainly including graphite particles and a second electrically conductive layer mainly including silver particles is formed on the electrolyte layer so as to cover an area surrounding the electrolyte layer.
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: August 28, 2007
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Takahisa Iida, Mutsumi Yano, Kazuhiro Takatani, Hiroshi Nonoue
  • Publication number: 20070146970
    Abstract: The objective of the current invention is to provide a solid electrolytic capacitor element with low equivalent series resistance. In this solid electrolytic capacitor element, an anode comprising a porous sintered body, and a dielectric layer are sequentially formed on an anode lead so as to cover a portion of the anode lead. An intermediate layer comprising polyethylene glycol is formed on the dielectric layer so as to cover an area around the dielectric layer. An electrolyte layer comprised of polypyrrole is formed on the intermediate layer so as to cover an area around the intermediate layer. A cathode comprised of: a first electrically conductive layer mainly comprising graphite particles and a second electrically conductive layer mainly comprising silver particles is formed on the electrolyte layer so as to cover an area surrounding the electrolyte layer.
    Type: Application
    Filed: December 1, 2006
    Publication date: June 28, 2007
    Inventors: Takahisa Iida, Mutsumi Yano, Kazuhiro Takatani, Hiroshi Nonoue
  • Patent number: 7236350
    Abstract: An anode includes a base body of a sintered porous material of niobium particles, a surface layer made of crystalline niobium oxide formed on the base body, and an anode lead having partly buried in base body 1a. A dielectric layer containing amorphous niobium oxide is formed by anodic oxidation on the cathode. An electrolyte layer made of polypyrrole is formed on the dielectric layer and a cathode is formed on the electrolyte layer. A conductive adhesive layer and cathode terminal are formed on an upper surface of the cathode. The anode lead exposed from the base body is connected to an anode terminal by welding. In addition, a mold resin is formed to cover the second conductive layer, the cathode terminal and the anode terminal so as to expose cathode terminal and an end of anode terminal.
    Type: Grant
    Filed: April 4, 2006
    Date of Patent: June 26, 2007
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Mutsumi Yano, Koichi Nishimura, Takahisa Iida, Mamoru Kimoto
  • Patent number: 7233483
    Abstract: A solid electrolytic capacitor having an anode of valve metals or of an alloy of which main component is valve metals; a dielectric layer formed by anodizing said anode; an electrolyte layer formed on said dielectric layer; and a cathode formed on said electrolyte layer; wherein said cathode has a silver layer using silver and sulfur and/or sulfur compound is contained in said silver layer.
    Type: Grant
    Filed: March 9, 2006
    Date of Patent: June 19, 2007
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kazuhiro Takatani, Takahisa Iida, Mamoru Kimoto
  • Patent number: 7233484
    Abstract: In this solid electrolytic capacitor, a plate-shaped anode having a porous sintered body is formed covering one part of an anode lead. A dielectric layer is formed covering the anode. An electrolyte layer of tantalum carbide is formed covering the dielectric layer. A cathode is formed covering the electrolyte layer. A conductive adhesive layer is formed on the upper surface of the cathode, and the cathode and a cathode terminal are connected by the conductive adhesive layer. An anode terminal is connected by welding the anode terminal on the anode lead projecting from the anode. Further, a mold outer resin is formed around the second conductive layer, the cathode terminal and the anode terminal.
    Type: Grant
    Filed: February 1, 2006
    Date of Patent: June 19, 2007
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kazuhiro Takatani, Takahisa Iida, Mamoru Kimoto
  • Patent number: 7206192
    Abstract: A solid electrolytic capacitor comprising: an anode of valve metals or alloy of which main component is valve metals; a dielectric layer formed by anodizing the anode; and a cathode formed on the dielectric layer, wherein the dielectric layer comprises a first dielectric layer located on the anode side and a second dielectric layer formed on the first dielectric layer, and oxygen concentration of the second dielectric layer is decreased from the first dielectric layer side toward the cathode side.
    Type: Grant
    Filed: February 17, 2006
    Date of Patent: April 17, 2007
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Takahisa Iida, Mutsumi Yano, Mamoru Kimoto, Yasumi Kobayashi, Hiroshi Nonoue
  • Publication number: 20070047179
    Abstract: A capacitor element comprises an anode, a dielectric layer formed on the anode, an electrolyte layer formed on the dielectric layer, and a cathode formed on the electrolyte layer. On the cathode formed by the surface of the capacitor element, a conductive adhesive layer containing silver particles and an organic silane layer made from aminopropyltriethoxysilane (APTES) are sequentially formed, and the cathode and a cathode terminal are connected through the conductive adhesive layer and the organic silane layer. In addition, an anode terminal is connected to an anode lead which exposed from the anode by welding.
    Type: Application
    Filed: August 29, 2006
    Publication date: March 1, 2007
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Hiroaki Izu, Takahisa Iida, Mutsumi Yano, Mamoru Kimoto
  • Publication number: 20070045696
    Abstract: A solid electrolytic capacitor element includes a first oxide layer formed on an anode, a second oxide layer formed on the first oxide layer, and a cathode formed on the second oxide layer. The first oxide layer includes Nb2O5 and the second oxide layer includes NbOx (1?x?2).
    Type: Application
    Filed: August 28, 2006
    Publication date: March 1, 2007
    Applicant: Sanyo Electric Co., Ltd.
    Inventors: Takahisa Iida, Mutsumi Yano, Takashi Umemoto, Hiroshi Nonoue
  • Patent number: 7177141
    Abstract: The present invention provides a solid electrolytic capacitor with low leakage current. In the solid electrolytic capacitor, an anode has an anode lead made of tantalum, a surface layer made of niobium formed on the anode lead, and a rectangular block shaped base body having a porous sintered body made from niobium particles, and the anode lead is partially embedded in the base body. Onto the anode, an oxide layer made of niobium oxide, an electrically conductive polymer layer, and a cathode laminated with a first electrically conductive layer and a second electrically conductive layer are sequentially laminated. Onto the top surface of an area surrounding the cathode, a cathode terminal is formed through an electrically conductive adhesive layer. Also, an anode terminal is connected onto an edge of the anode lead.
    Type: Grant
    Filed: July 10, 2006
    Date of Patent: February 13, 2007
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Takahisa Iida, Mutsumi Yano, Mamoru Kimoto