Patents by Inventor Kazuhiro Takatani
Kazuhiro Takatani 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).
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Publication number: 20080259529Abstract: A solid electrolytic capacitor includes an anode substrate, a dielectric layer provided on the anode substrate, a first cathode layer provided on the dielectric layer, and a second cathode layer provided on the first cathode layer. The first cathode layer is a layer made of polyethylenedioxythiophene and polypyrrole. The second layer is a layer made of polypyrrole.Type: ApplicationFiled: December 4, 2007Publication date: October 23, 2008Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kazuhiro Takatani, Mutsumi Yano, Takashi Umemoto, Hiroshi Nonoue
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Publication number: 20080232036Abstract: The present invention relates to a solid electrolytic capacitor provided with a anode made of a metal or an alloy having valve action, a dielectric layer formed on the anode, and an electrolyte layer consisting of a conductive polymer layer formed so as to have contact with a portion of the region on the dielectric layer surface and a manganese dioxide layer formed so as to have contact with the other portion of the region on the dielectric layer surface.Type: ApplicationFiled: March 10, 2008Publication date: September 25, 2008Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kikuko Kato, Mutsumi Yano, Kazuhiro Takatani, Koichi Nishimura, Takashi Umemoto, Hiroshi Nonoue
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Publication number: 20080174939Abstract: A niobium solid electrolytic capacitor having an anode composed of niobium or a niobium alloy, a dielectric layer formed on a surface of the anode by anodization and containing nitrogen and fluorine, and a cathode formed on the dielectric layer. Preferably, the dielectric layer has an increasing concentration gradient of fluorine from its cathode side toward its anode side.Type: ApplicationFiled: January 18, 2008Publication date: July 24, 2008Applicant: Sanyo Electric Co., Ltd.Inventors: Yasumi KOBAYASHI, Kazuhiro Takatani, Mutsumi Yano, Hiroshi Nonoue
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Patent number: 7362561Abstract: In a solid electrolytic capacitor provided with an anode, a cathode, and a dielectric layer formed by anodization of the anode, the anode includes a first metal layer and a second metal layer. The first metal layer is made of any of metal selected from niobium, aluminum and tantalum, or an alloy containing any of metal selected from niobium, aluminum and tantalum as a main component. The second metal layer contains any of metal selected from titanium, zirconium and hafnium. Here, a part of a surface of the first metal layer is covered with the second metal layer.Type: GrantFiled: March 29, 2007Date of Patent: April 22, 2008Assignee: Sanyo Electric Co., Ltd.Inventors: Kazuhiro Takatani, Takashi Umemoto, Hiroshi Nonoue
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Publication number: 20080084652Abstract: In a solid electrolytic capacitor provided with an anode, a cathode, and a dielectric layer formed by anodization of the anode, the anode includes a first metal layer and a second metal layer. The first metal layer is made of any of metal selected from niobium, aluminum and tantalum, or an alloy containing any of metal selected from niobium, aluminum and tantalum as a main component. The second metal layer contains any of metal selected from titanium, zirconium and hafnium. Here, a part of a surface of the first metal layer is covered with the second metal layer.Type: ApplicationFiled: November 26, 2007Publication date: April 10, 2008Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kazuhiro Takatani, Takashi Umemoto, Hiroshi Nonoue
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Patent number: 7349198Abstract: A solid electrolytic capacitor having less occurrence of leakage current and a fabrication method therefor. In a solid electrolytic capacitor, a dielectric layer of niobium oxide having high electrical insulation whose major component is niobium or oxygen, an electrolyte layer and a cathode are formed in the order on an anode formed of niobium or niobium alloy, the dielectric layer is composed of a first dielectric layer containing fluorine formed on the anode and a second dielectric layer containing phosphorus or sulfur formed on the first dielectric layer and fluorine concentration in the first dielectric layer is decreased from the anode side toward the second dielectric layer.Type: GrantFiled: December 21, 2004Date of Patent: March 25, 2008Assignee: Sanyo Electric Co., Ltd.Inventors: Mutsumi Yano, Kazuhiro Takatani, Mamoru Kimoto
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Publication number: 20080047116Abstract: 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: ApplicationFiled: July 25, 2007Publication date: February 28, 2008Applicant: Sanyo Electric Co., Ltd.Inventors: Kazuhiro TAKATANI, Takahisa Iida, Takashi Umemoto, Hiroshi Nonoue
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Publication number: 20070285876Abstract: 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: ApplicationFiled: May 29, 2007Publication date: December 13, 2007Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kazuhiro Takatani, Mutsumi Yano, Hiroaki Izu, Takahisa Iida, Takashi Umemoto, Hiroshi Nonoue
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Publication number: 20070232012Abstract: In a solid electrolytic capacitor provided with an anode, a cathode, and a dielectric layer formed by anodization of the anode, the anode includes a first metal layer and a second metal layer. The first metal layer is made of any of metal selected from niobium, aluminum and tantalum, or an alloy containing any of metal selected from niobium, aluminum and tantalum as a main component. The second metal layer contains any of metal selected from titanium, zirconium and hafnium. Here, a part of a surface of the first metal layer is covered with the second metal layer.Type: ApplicationFiled: March 29, 2007Publication date: October 4, 2007Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kazuhiro Takatani, Takashi Umemoto, Hiroshi Nonoue
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Patent number: 7262954Abstract: 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: GrantFiled: December 1, 2006Date of Patent: August 28, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Takahisa Iida, Mutsumi Yano, Kazuhiro Takatani, Hiroshi Nonoue
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Publication number: 20070188981Abstract: A solid electrolytic capacitor includes an anode and a dielectric layer. The anode is made of niobium or a niobium alloy. The dielectric layer is made of niobium oxide formed on the niobium or the niobium alloy. The niobium oxide has a feature that a full width at half maximum of a peak of an Mz ray of characteristic X-rays of niobium is 0.98 ? or more. The characteristic X-rays are emitted when the niobium oxide is irradiated with an electron beam.Type: ApplicationFiled: February 27, 2007Publication date: August 16, 2007Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kazuhiro Takatani, Kazumi Kurooka, Tomoko Omori, Mutsumi Yano, Takashi Umemoto, Hiroshi Nonoue
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Publication number: 20070146970Abstract: 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: ApplicationFiled: December 1, 2006Publication date: June 28, 2007Inventors: Takahisa Iida, Mutsumi Yano, Kazuhiro Takatani, Hiroshi Nonoue
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Patent number: 7233483Abstract: 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: GrantFiled: March 9, 2006Date of Patent: June 19, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Kazuhiro Takatani, Takahisa Iida, Mamoru Kimoto
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Patent number: 7233484Abstract: 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: GrantFiled: February 1, 2006Date of Patent: June 19, 2007Assignee: Sanyo Electric Co., Ltd.Inventors: Kazuhiro Takatani, Takahisa Iida, Mamoru Kimoto
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Patent number: 7154743Abstract: A solid electrolytic capacitor comprises an anode formed of at least one metal selected from tantalum, niobium, titanium and tungsten, and a dielectric layer, an electrolytic layer and a cathode disposed on the anode, wherein the cathode comprises a mixed layer containing a first material consisting of silver particles having an average particle diameter (median diameter) of not less than 2 ?m, a second material consisting of conducting carbon particles and/or silver particles having an average particle diameter (median diameter) of 1 ?m or less and a binding agent.Type: GrantFiled: December 3, 2003Date of Patent: December 26, 2006Assignee: Sanyo Electric Co., Ltd.Inventors: Kazuhiro Takatani, Mutsumi Yano, Mamoru Kimoto
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Publication number: 20060221554Abstract: 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: ApplicationFiled: February 1, 2006Publication date: October 5, 2006Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kazuhiro Takatani, Takahisa Iida, Mamoru Kimoto
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Publication number: 20060215354Abstract: An aspect of the present invention provides a method of manufacturing a solid electrolytic capacitor. The solid electrolytic capacitor includes an anode made of valve action metal, a dielectric layer, a solid electrolytic layer, a cathode conductive layer, and a cathode terminal. The method forms the cathode conductive layer by forming a conductive paste and conductive adhesive between the solid electrolytic layer and the cathode terminal and then simultaneously hardening the conductive paste and the conductive adhesive.Type: ApplicationFiled: March 28, 2006Publication date: September 28, 2006Applicant: Sanyo Electric Co., Ltd.Inventors: Kazuhiro Takatani, Mamoru Kimoto
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Publication number: 20060209496Abstract: A solid electrolytic capacitor comprising: 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 comprises a silver layer using silver and sulfur and/or sulfur compound is contained in said silver layer.Type: ApplicationFiled: March 9, 2006Publication date: September 21, 2006Applicant: SANYO ELECTRIC CO., LTD.Inventors: Kazuhiro Takatani, Takahisa Iida, Mamoru Kimoto
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Publication number: 20060133014Abstract: [Objectives]The objectives are to provide a solid electrolytic capacitor having less occurrence of leakage current and a fabrication method therefor. [Solutions] In a solid electrolytic capacitor 100, a dielectric layer 2 of niobium oxide having high electrical insulation whose major component is niobium or oxygen, an electrolyte layer 3 and a cathode 4 are formed in the order on an anode 1 formed of niobium or niobium alloy, said dielectric layer 2 is composed of a first dielectric layer 21 containing fluorine formed on the anode 1 and a second dielectric layer 22 containing phosphorus or sulfur formed on the first dielectric layer 21 and fluorine concentration in said first dielectric layer 21 is decreased from the anode 1 side toward the second dielectric layer 22.Type: ApplicationFiled: December 21, 2004Publication date: June 22, 2006Inventors: Mutsumi Yano, Kazuhiro Takatani, Mamoru Kimoto
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Publication number: 20060114645Abstract: A solid electrolytic capacitor comprises an anode formed of at least one metal selected from tantalum, niobium, titanium and tungsten, and a dielectric layer, an electrolytic layer and a cathode disposed on the anode, wherein the cathode comprises a mixed layer containing a first material consisting of silver particles having an average particle diameter (median diameter) of not less than 2 ?m, a second material consisting of conducting carbon particles and/or silver particles having an average particle diameter (median diameter) of 1 ?m or less and a binding agent.Type: ApplicationFiled: December 3, 2003Publication date: June 1, 2006Inventors: Kazuhiro Takatani, Mutsumi Yano, Mamoru Kimoto