Patents by Inventor Naomi Kurihara

Naomi Kurihara 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: 20220148815
    Abstract: An electrode foil for an electrolytic capacitor including a metal porous portion, and a metal core portion continuous to the metal porous portion. When the metal porous portion is equally divided in three in a thickness direction of the metal porous portion into a first region, a second region, and a third region sequentially from the metal core portion side, the first region has a porosity P1, the second region has a porosity P2, and the third region has a porosity P3, satisfying P1<P2<P3.
    Type: Application
    Filed: October 30, 2019
    Publication date: May 12, 2022
    Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Mitsuhisa YOSHIMURA, Shosuke NAKANO, Hiroshi YOSHIDA, Masami TSUBAKI, Naomi KURIHARA, Miwa OGAWA
  • Publication number: 20220115185
    Abstract: A film production method for producing a layer containing a metal oxide, the film production method including: a heating step of heating a metal foil containing a first metal by bringing a part of the metal foil into contact with at least one heat generator; a first contact step of letting first gas containing a second metal to be in contact with both surfaces of the metal foil in a state where the part of the metal foil is supported; and a second contact step of letting second gas containing an oxidant to be in contact with the both surfaces of the metal foil in a state where the part of the metal foil is supported.
    Type: Application
    Filed: February 19, 2020
    Publication date: April 14, 2022
    Inventors: NAOMI KURIHARA, AKIHIRO YAMAGUCHI, MITSUHISA YOSHIMURA, MIWA OGAWA
  • Patent number: 11222753
    Abstract: An electrode includes a core portion including a first metal, and a porous portion disposed in contact with the core portion. The porous portion includes a porous body, a first dielectric layer, and a second dielectric layer. The porous body is integrated with the core portion and includes the first metal. The first dielectric layer covers at least a part of a surface of the porous body. And the second dielectric layer covers at least a part of the first dielectric layer. The first dielectric layer includes oxide of first metal, and the second dielectric layer includes oxide of a second metal. The second metal is different from the first metal. When T is a thickness of the porous portion, the second metal is distributed to a region closer to the core portion than a position of 0.5T from a boundary between the core portion and the porous portion.
    Type: Grant
    Filed: September 2, 2019
    Date of Patent: January 11, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Miwa Ogawa, Naomi Kurihara
  • Publication number: 20210366660
    Abstract: An electrode foil for an electrolytic capacitor includes an anode body foil having a porous part, and a dielectric layer covering a surface of a metal framework constituting the porous part. The dielectric layer includes a first layer containing an oxide of a second metal, the second metal being different from a first metal contained in the metal framework. An underlayer that is continuous with the first layer is provided between the metal framework and the first layer. The underlayer contains phosphorus and carbon.
    Type: Application
    Filed: August 6, 2021
    Publication date: November 25, 2021
    Inventors: MIWA OGAWA, NAOMI KURIHARA, MITSUHISA YOSHIMURA
  • Publication number: 20210366661
    Abstract: An electrode foil for an electrolytic capacitor includes a metal foil having a porous part, and a dielectric layer covering a surface of a metal framework constituting the porous part. The dielectric layer includes a first layer containing an oxide of a second metal different from a first metal contained in the metal framework. The first layer has a thickness T1. The first layer contains at least one kind of additive element selected from the group consisting of carbon, phosphorus, boron, and nitrogen. The first layer includes a first region from an outer surface of the first layer to a center of the first layer in a thickness direction, and a second region from the center to an inner surface of the first layer. A content of the at least one kind of additive element in the second region is greater than a content of the at least one kind of additive element in the first region.
    Type: Application
    Filed: August 9, 2021
    Publication date: November 25, 2021
    Inventors: MITSUHISA YOSHIMURA, NAOMI KURIHARA, MIWA OGAWA, YASUHIRO TSUDA
  • Patent number: 11087929
    Abstract: An electrolytic capacitor includes a capacitor element, a lead member, an outer packaging resin layer, and a silica film. The lead member is electrically connected to the capacitor element. The outer packaging resin layer covers the capacitor element and a part of the lead member. The silica film covers at least a part of the outer packaging resin layer.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: August 10, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Naomi Kurihara, Keita Uenaka
  • Patent number: 11049663
    Abstract: An electrolytic capacitor includes a capacitor element, a lead member electrically connected to the capacitor element, an outer packaging member in which the capacitor element and a part of the lead member are sealed, and a heat barrier layer that covers at least a part of the outer packaging member. The heat barrier layer has an electrical insulation property, and contains at least one of metallic oxide and metal hydroxide.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: June 29, 2021
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kouta Muneyasu, Masahiro Sato, Naomi Kurihara, Keita Uenaka
  • Publication number: 20200373090
    Abstract: An electrode foil for an electrolytic capacitor includes an anode electrode body including a base material part having a porous body portion, and a dielectric layer disposed on a surface of the porous body portion. The anode electrode body has a first main surface in which pores of the porous body portion are opened, a second main surface opposite to the first main surface, and an end surface connecting the first main surface and the second main surface. In the porous body portion, a first film thickness of the dielectric layer in an end surface vicinity region is larger than a second film thickness of the dielectric layer in a deep inner region, the end surface vicinity region being a region within a predetermined distance from the end surface, the deep inner region being a region located away from the first main surface and at a central portion in a direction parallel to the first main surface.
    Type: Application
    Filed: August 4, 2020
    Publication date: November 26, 2020
    Inventors: MITSUHISA YOSHIMURA, TATSUJI AOYAMA, NAOMI KURIHARA, MIWA OGAWA
  • Publication number: 20200006011
    Abstract: An electrode includes a core portion including a first metal, and a porous portion disposed in contact with the core portion. The porous portion includes a porous body, a first dielectric layer, and a second dielectric layer. The porous body is integrated with the core portion and includes the first metal. The first dielectric layer covers at least a part of a surface of the porous body. And the second dielectric layer covers at least a part of the first dielectric layer. The first dielectric layer includes oxide of first metal, and the second dielectric layer includes oxide of a second metal. The second metal is different from the first metal. When T is a thickness of the porous portion, the second metal is distributed to a region closer to the core portion than a position of 0.5T from a boundary between the core portion and the porous portion.
    Type: Application
    Filed: September 2, 2019
    Publication date: January 2, 2020
    Inventors: MIWA OGAWA, NAOMI KURIHARA
  • Publication number: 20190333703
    Abstract: An electrolytic capacitor includes a capacitor element, a lead member electrically connected to the capacitor element, an outer packaging member in which the capacitor element and a part of the lead member are sealed, and a heat barrier layer that covers at least a part of the outer packaging member. The heat barrier layer has an electrical insulation property, and contains at least one of metallic oxide and metal hydroxide.
    Type: Application
    Filed: July 5, 2019
    Publication date: October 31, 2019
    Inventors: KOUTA MUNEYASU, MASAHIRO SATO, NAOMI KURIHARA, KEITA UENAKA
  • Publication number: 20190287731
    Abstract: An electrolytic capacitor includes a capacitor element, a lead member, an outer packaging resin layer, and a silica film. The lead member is electrically connected to the capacitor element. The outer packaging resin layer covers the capacitor element and a part of the lead member. The silica film covers at least a part of the outer packaging resin layer.
    Type: Application
    Filed: June 3, 2019
    Publication date: September 19, 2019
    Inventors: NAOMI KURIHARA, KEITA UENAKA
  • Patent number: 8784637
    Abstract: The present invention provides a method of manufacturing anode foil for aluminum electrolytic capacitors with high capacitance and decreased leakage current. The method has the following steps: dipping etched aluminum foil into pure water having a temperature of 90° C. or higher so as to form a hydrated film on the foil; attaching organic acid to the surface of the hydrated film; performing main chemical conversion on the aluminum foil with application of formation voltage after the attaching step; performing depolarization on the aluminum foil after the main chemical conversion step; and performing follow-up chemical conversion on the aluminum foil after the main chemical conversion step. The main chemical conversion treatment has two-or-more stages. In the first stage of the treatment, the foil is dipped into a phosphate aqueous solution, and in the last stage, it is dipped into an aqueous solution different from the phosphate aqueous solution.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: July 22, 2014
    Assignee: Panasonic Corporation
    Inventors: Naomi Kurihara, Katsunori Matsuda, Fumiaki Kawaguchi, Takahiro Suzuki
  • Patent number: 8749954
    Abstract: Electrode foil includes an aluminum alloy having a composition in a region at least 10 ?m deep from a surface of the foil. The composition includes aluminum as a main component and zirconium of at least 0.03 at % and at most 0.5 at %.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: June 10, 2014
    Assignee: Panasonic Corporation
    Inventors: Masashi Shoji, Hitoshi Ishimoto, Ayumi Kochi, Tomohiro Maruoka, Naomi Kurihara, Takao Sato
  • Publication number: 20120200985
    Abstract: Electrode foil includes an aluminum alloy having a composition in a region at least 10 ?m deep from a surface of the foil. The composition includes aluminum as a main component and zirconium of at least 0.03 at % and at most 0.5 at %.
    Type: Application
    Filed: October 19, 2010
    Publication date: August 9, 2012
    Inventors: Masashi Shoji, Hitoshi Ishimoto, Ayumi Kochi, Tomohiro Maruoka, Naomi Kurihara, Takao Sato
  • Publication number: 20100326837
    Abstract: The present invention provides a method of manufacturing anode foil for aluminum electrolytic capacitors with high capacitance and decreased leakage current. The method has the following steps: dipping etched aluminum foil into pure water having a temperature of 90° C. or higher so as to form a hydrated film on the foil; attaching organic acid to the surface of the hydrated film; performing main chemical conversion on the aluminum foil with application of formation voltage after the attaching step; performing depolarization on the aluminum foil after the main chemical conversion step; and performing follow-up chemical conversion on the aluminum foil after the main chemical conversion step. The main chemical conversion treatment has two-or-more stages. In the first stage of the treatment, the foil is dipped into a phosphate aqueous solution, and in the last stage, it is dipped into an aqueous solution different from the phosphate aqueous solution.
    Type: Application
    Filed: June 7, 2010
    Publication date: December 30, 2010
    Inventors: Naomi KURIHARA, Katsunori Matsuda, Fumiaki Kawaguchi, Takahiro Suzuki
  • Patent number: 6726825
    Abstract: A method of manufacturing a positive electrode foil of an aluminum electrolytic capacitor is provided in which anodizing conditions are optimally determined and automatically set to minimize the loss of production and to produce a constant quality of the positive electrode foil. The method comprises an etching process and an anodizing process. An etched foil produced in the etching process is subjected to a constant current inspection, and then, the anodizing conditions are determined from the result of the constant current inspection. The anodizing conditions are transferred to a control panel in the anodizing process where they are automatically registered as its settings. Also, an apparatus for manufacturing the positive electrode foil is provided which has a voltage sensor connected between an output running roller and cathode electrodes in an anodizing tank. A voltage measured by the voltage sensor is fed back to a direct-current source for controlling its output voltage.
    Type: Grant
    Filed: April 3, 2001
    Date of Patent: April 27, 2004
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Mitsuhisa Yoshimura, Kazuaki Nakanishi, Kenji Yoshida, Seita Takahashi, Hiroyuki Nakano, Naomi Kurihara, Katsuyuki Nakamura, Masanori Okabayashi, Takahiro Suzuki
  • Patent number: 6620306
    Abstract: A method of manufacturing electrode foil for aluminum electrolytic capacitors and an AC power supply unit used therewith are disclosed. An etching is performed on an aluminum foil immersed in an electrolytic solution by applying an AC current to a pair of electrodes in the electrolytic solution. A waveform of the AC current is a deformed sine wave including a period of time (a) when an electric current rises from zero to a peak value, and another period of time (b) when the electric current falls from the peak value to zero. With the periods of time (a) and (b) made different from each other, the surface area of the aluminum foil is efficiently expanded by the etching and an enhancement of electric capacity of the electrode foil is obtained.
    Type: Grant
    Filed: November 27, 2001
    Date of Patent: September 16, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Mitsuhisa Yoshimura, Takehiko Nakahara, Kazunari Hayashi, Hiromi Nakanishi, Naomi Kurihara
  • Publication number: 20020092777
    Abstract: A method of manufacturing electrode foil for aluminum electrolytic capacitors and an AC power supply unit used therewith. An etching is performed on an aluminum foil immersed in a electrolytic solution by applying an AC current to a pair of electrodes in the electrolytic solution. A waveform of the AC current is a deformed sine wave including a period of time (a) when an electric current rises from zero to a peak value, and another period of time (b) when the electric current falls from the peak value to zero. With the periods of time (a) and (b) made different from each other, the surface area of the aluminum foil is expanded by the etching efficiently and an enhancement of electric capacity of the electrode foil is obtained.
    Type: Application
    Filed: November 27, 2001
    Publication date: July 18, 2002
    Inventors: Mitsuhisa Yoshimura, Takehiko Nakahara, Kazunari Hayashi, Hiromi Nakanishi, Naomi Kurihara
  • Publication number: 20010042687
    Abstract: A method of manufacturing a positive electrode foil of an aluminum electrolytic capacitor is provided in which anodizing conditions are optimally determined and automatically set to minimize the loss of production and to produce a constant quality of the positive electrode foil. The method comprises an etching process and an anodizing process. An etched foil produced in the etching process is subjected to a constant current inspection, and then, the anodizing conditions are determined from the result of the constant current inspection. The anodizing conditions are transferred to a control panel in the anodizing process where they are automatically registered as its settings. Also, an apparatus for manufacturing the positive electrode foil is provided which has a voltage sensor connected between an output running roller and cathode electrodes in an anodizing tank. A voltage measured by the voltage sensor is fed back to a direct-current source for controlling its output voltage.
    Type: Application
    Filed: April 3, 2001
    Publication date: November 22, 2001
    Inventors: Mitsuhisa Yoshimura, Kazuaki Nakanishi, Kenji Yoshida, Seita Takahashi, Hiroyuki Nakano, Naomi Kurihara, Katsuyuki Nakamura, Masanori Okabayashi, Takahiro Suzuki
  • Patent number: 5449448
    Abstract: This invention includes a first step for dipping etched aluminium foil into pure water of high temperature for a predetermined period of time, a second step for dipping the aluminium foil into an aqueous solution containing an organic acid and at least one kind of a salt thereof after the first step, and a third step for subjecting the aluminium foil to a forming treatment in an electrolytic solution after the second step, wherein either straight saturated dicarboxylic acid having an odd number of carbons or trans-straight unsaturated dicarboxylic acid is used or organic acid having an aromatic ring and a carboxyl group is used as the organic acid in the second step, whereby leakage current characteristics are improved by weakening a dissolving action to a hydrated film and strengthening a bonding action to the hydrated film.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: September 12, 1995
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Naomi Kurihara, Kazuo Okamura, Yoshihito Yoshimura, Tetsuo Sonoda, Kouichi Kojima