Patents by Inventor Tetsuro Iwasa
Tetsuro Iwasa 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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Patent number: 10991514Abstract: A method for producing an electrolytic capacitor includes: a first step of preparing an anode body, and forming a dielectric layer on a surface of the anode body; a second step of forming a first conductive polymer layer on a surface of the dielectric layer, the first conductive polymer layer including a first conductive polymer and a first silane compound; a third step of bringing the first conductive polymer layer into contact with a first treatment liquid; and a fourth step of providing a second silane compound to the first conductive polymer layer after the third step.Type: GrantFiled: September 7, 2018Date of Patent: April 27, 2021Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Nobuyuki Yamaguchi, Koji Fukuchi, Koji Okamoto, Tetsuro Iwasa, Takahiro Kobayashi, Yasuo Tanaka, Ryo Morioka
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Patent number: 10861654Abstract: An electrolytic capacitor includes an anode body, a dielectric layer formed on the anode body, and a solid electrolyte layer covering at least a portion of the dielectric layer. The solid electrolyte layer includes a ?-conjugated conductive polymer, a high-molecular-weight dopant having an acid group, and a water-soluble polymer. The water-soluble polymer is a copolymer including a hydrophilic monomer unit having a hydrophilic group. The hydrophilic group is at least one group selected from the group consisting of a carboxyl group, an acid anhydride group, a phenolic hydroxyl group, and a C2-3 alkylene oxide group.Type: GrantFiled: October 26, 2018Date of Patent: December 8, 2020Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Youichirou Uka, Makoto Nagashima, Tetsuro Iwasa, Koji Okamoto
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Patent number: 10679795Abstract: An electrolytic capacitor includes an anode body, a dielectric layer formed on the anode body, a first conductive polymer layer covering at least a part of the dielectric layer, and a second conductive polymer layer covering at least a part of the first conductive polymer layer. The first conductive polymer layer contains a first conductive polymer and a first silane compound. The second conductive polymer layer contains a second conductive polymer and a basic compound. The basic compound may be an amine compound.Type: GrantFiled: December 14, 2017Date of Patent: June 9, 2020Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Nobuyuki Yamaguchi, Koji Fukuchi, Tetsuro Iwasa, Koji Okamoto, Takahiro Kobayashi, Yasuo Tanaka, Ryo Morioka
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Patent number: 10475590Abstract: An electrolytic capacitor includes: an anode body; a dielectric layer formed on the anode body; a first conductive polymer layer which covers at least a portion of the dielectric layer; and a second conductive polymer layer which covers at least a portion of the first conductive polymer layer. The first conductive polymer layer includes a first layer and a second layer. The first layer contains a first conductive polymer and a first dopant, and covers at least a portion of the dielectric layer. The second layer is formed on the first layer, and contains a first silane compound. The second conductive polymer layer contains a second conductive polymer, a second dopant, and a basic compound.Type: GrantFiled: January 12, 2018Date of Patent: November 12, 2019Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.Inventors: Nobuyuki Yamaguchi, Koji Fukuchi, Koji Okamoto, Tetsuro Iwasa, Takahiro Kobayashi, Yasuo Tanaka, Ryo Morioka
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Publication number: 20190074139Abstract: An electrolytic capacitor includes an anode body, a dielectric layer formed on the anode body, and a solid electrolyte layer covering at least a portion of the dielectric layer. The solid electrolyte layer includes a ?-conjugated conductive polymer, a high-molecular-weight dopant having an acid group, and a water-soluble polymer. The water-soluble polymer is a copolymer including a hydrophilic monomer unit having a hydrophilic group. The hydrophilic group is at least one group selected from the group consisting of a carboxyl group, an acid anhydride group, a phenolic hydroxyl group, and a C2-3 alkylene oxide group.Type: ApplicationFiled: October 26, 2018Publication date: March 7, 2019Inventors: Youichirou UKA, Makoto NAGASHIMA, Tetsuro IWASA, Koji OKAMOTO
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Patent number: 10199176Abstract: An electrolytic capacitor includes an anode body, a dielectric layer formed on the anode body, and a solid electrolyte layer covering at least a portion of the dielectric layer. The solid electrolyte layer includes a first conductive polymer layer covering at least a portion of the dielectric layer, and a second conductive polymer layer covering at least a portion of the first conductive polymer layer. The second conductive polymer layer includes a second conductive polymer and a water-soluble polymer. The water-soluble polymer is a copolymer including a hydrophilic monomer unit having a hydrophilic group. The hydrophilic group is at least one group selected from the group consisting of a carboxyl group, an acid anhydride group, a phenolic hydroxyl group, and a C2-3 alkylene oxide group.Type: GrantFiled: August 11, 2016Date of Patent: February 5, 2019Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Youichirou Uka, Makoto Nagashima, Tetsuro Iwasa, Koji Okamoto
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Publication number: 20190006110Abstract: A method for producing an electrolytic capacitor includes: a first step of preparing an anode body, and forming a dielectric layer on a surface of the anode body; a second step of forming a first conductive polymer layer on a surface of the dielectric layer, the first conductive polymer layer including a first conductive polymer and a first silane compound; a third step of bringing the first conductive polymer layer into contact with a first treatment liquid; and a fourth step of providing a second silane compound to the first conductive polymer layer after the third step.Type: ApplicationFiled: September 7, 2018Publication date: January 3, 2019Inventors: NOBUYUKI YAMAGUCHI, KOJI FUKUCHI, KOJI OKAMOTO, TETSURO IWASA, TAKAHIRO KOBAYASHI, YASUO TANAKA, RYO MORIOKA
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Publication number: 20180158618Abstract: An electrolytic capacitor includes: an anode body; a dielectric layer formed on the anode body; a first conductive polymer layer which covers at least a portion of the dielectric layer; and a second conductive polymer layer which covers at least a portion of the first conductive polymer layer. The first conductive polymer layer includes a first layer and a second layer. The first layer contains a first conductive polymer and a first dopant, and covers at least a portion of the dielectric layer. The second layer is formed on the first layer, and contains a first silane compound. The second conductive polymer layer contains a second conductive polymer, a second dopant, and a basic compound.Type: ApplicationFiled: January 12, 2018Publication date: June 7, 2018Inventors: NOBUYUKI YAMAGUCHI, KOJI FUKUCHI, KOJI OKAMOTO, TETSURO IWASA, TAKAHIRO KOBAYASHI, YASUO TANAKA, RYO MORIOKA
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Publication number: 20180108488Abstract: An electrolytic capacitor includes an anode body, a dielectric layer formed on the anode body, a first conductive polymer layer covering at least a part of the dielectric layer, and a second conductive polymer layer covering at least a part of the first conductive polymer layer. The first conductive polymer layer contains a first conductive polymer and a first silane compound. The second conductive polymer layer contains a second conductive polymer and a basic compound. The basic compound may be an amine compound.Type: ApplicationFiled: December 14, 2017Publication date: April 19, 2018Inventors: NOBUYUKI YAMAGUCHI, KOJI FUKUCHI, TETSURO IWASA, KOJI OKAMOTO, TAKAHIRO KOBAYASHI, YASUO TANAKA, RYO MORIOKA
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Publication number: 20160351340Abstract: An electrolytic capacitor includes an anode body, a dielectric layer formed on the anode body, and a solid electrolyte layer covering at least a portion of the dielectric layer. The solid electrolyte layer includes a first conductive polymer layer covering at least a portion of the dielectric layer, and a second conductive polymer layer covering at least a portion of the first conductive polymer layer. The second conductive polymer layer includes a second conductive polymer and a water-soluble polymer. The water-soluble polymer is a copolymer including a hydrophilic monomer unit having a hydrophilic group. The hydrophilic group is at least one group selected from the group consisting of a carboxyl group, an acid anhydride group, a phenolic hydroxyl group, and a C2-3 alkylene oxide group.Type: ApplicationFiled: August 11, 2016Publication date: December 1, 2016Inventors: YOUICHIROU UKA, MAKOTO NAGASHIMA, TETSURO IWASA, KOJI OKAMOTO
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Patent number: 8057553Abstract: A method for manufacturing a solid electrolytic capacitor having a solid electrolyte layer containing an electrically conductive polymer layer formed by electrolytic oxidative polymerization, comprising: forming a dielectric layer on a surface of an anode element containing a valve metal; forming an electrically conductive precoat layer on the dielectric layer; and performing electrolytic oxidative polymerization in an electrolytic polymerization solution containing a monomer, a dopant agent and a chelating agent to form the electrically conductive polymer layer on the electrically conductive precoat layer.Type: GrantFiled: March 17, 2008Date of Patent: November 15, 2011Assignee: SANYO Electric Co., Ltd.Inventors: Tetsuro Iwasa, Hiroshi Nakajima, Seiji Omura
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Patent number: 8050014Abstract: A solid electrolytic capacitor having a solid electrolyte layer, comprising: the solid electrolyte layer having an electrically-conductive polymer hybrid layer containing an electrolytically-polymerized electrically-conductive polymer and a chemically-polymerized electrically-conductive polymer.Type: GrantFiled: February 7, 2008Date of Patent: November 1, 2011Assignee: Sanyo Electric Co., Ltd.Inventors: Tetsuro Iwasa, Hiroshi Nakajima, Seiji Omura
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Publication number: 20080222862Abstract: A method for manufacturing a solid electrolytic capacitor having a solid electrolyte layer containing an electrically conductive polymer layer formed by electrolytic oxidative polymerization, comprising: forming a dielectric layer on a surface of an anode element containing a valve metal; forming an electrically conductive precoat layer on the dielectric layer; and performing electrolytic oxidative polymerization in an electrolytic polymerization solution containing a monomer, a dopant agent and a chelating agent to form the electrically conductive polymer layer on the electrically conductive precoat layer.Type: ApplicationFiled: March 17, 2008Publication date: September 18, 2008Applicant: SANYO ELECTRIC CO., LTD.Inventors: Tetsuro IWASA, Hiroshi NAKAJIMA, Seiji OMURA
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Publication number: 20080204975Abstract: A solid electrolytic capacitor having a solid electrolyte layer, comprising: the solid electrolyte layer having an electrically-conductive polymer hybrid layer containing an electrolytically-polymerized electrically-conductive polymer and a chemically-polymerized electrically-conductive polymer.Type: ApplicationFiled: February 7, 2008Publication date: August 28, 2008Applicant: SANYO ELECTRIC CO., LTDInventors: Tetsuro Iwasa, Hiroshi Nakajima, Seiji Omura
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Patent number: 7126812Abstract: A solid electrolytic capacitor using a conductive polymer compound as a solid electrolyte includes an anode body, a dielectric oxide coating formed on a surface of the anode body, a sulfone group-containing silanol derivative layer formed on at least a portion of the dielectric oxide coating by a coupling reaction, and a conductive polymer compound layer formed at least on the sulfone group-containing silanol derivative layer. With this, a solid electrolytic capacitor having a low ESR and a high capacitance and a method of manufacturing the solid electrolytic capacitor can be provided.Type: GrantFiled: October 13, 2005Date of Patent: October 24, 2006Assignee: Sanyo Electric Co., Ltd.Inventors: Yoshikazu Hirata, Tetsuro Iwasa
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Publication number: 20060082951Abstract: A solid electrolytic capacitor using a conductive polymer compound as a solid electrolyte includes an anode body, a dielectric oxide coating formed on a surface of the anode body, a sulfone group-containing silanol derivative layer formed on at least a portion of the dielectric oxide coating by a coupling reaction, and a conductive polymer compound layer formed at least on the sulfone group-containing silanol derivative layer. With this, a solid electrolytic capacitor having a low ESR and a high capacitance and a method of manufacturing the solid electrolytic capacitor can be provided.Type: ApplicationFiled: October 13, 2005Publication date: April 20, 2006Applicant: SANYO ELECTRIC CO., LTDInventors: Yoshikazu Hirata, Tetsuro Iwasa