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公开(公告)号：US20230274890A1
公开(公告)日：2023-08-31
申请号：US18003692
申请日：2021-07-15
Inventor： MIWA OGAWA , NAOMI KURIHARA , MITSUHISA YOSHIMURA
Abstract: An electrode foil for an electrolytic capacitor includes a base material containing a valve metal and a dissimilar metal composite layer covering a surface of the base material. The dissimilar metal composite layer includes a mixed region in which a first metal and a second metal are mixed. The second metal is different from the first metal. The mixed region constitutes at least 50% of the dissimilar metal composite layer in a thickness-wise direction of the dissimilar metal composite layer. Each of a content M1 of the first metal and a content M2 of the second metal with respect to all metals in the mixed region is 1 atomic % or more.
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公开(公告)号：US20250104930A1
公开(公告)日：2025-03-27
申请号：US18687354
申请日：2022-08-17
Inventor： NAOMI KURIHARA , HIDEYUKI KURAHASHI , MIWA OGAWA
Abstract: A porous portion and a core portion continuous with the porous portion are provided. In a thickness direction of the porous portion, when the porous portion is equally divided into first to tenth regions in order from an outer surface side of the porous portion, A1 to A10 μm/μm2 respectively represent pit circumferential lengths of the first to tenth regions. At this time, a high-capacitance electrolytic capacitor is provided by using an electrode foil for an electrolytic capacitor in which a maximum value Amax of the pit circumferential lengths among A1 to A10, a (Nmax)th region indicating Amax, a minimum value Amin of the pit circumferential lengths among regions located at a side close to the outer surface of the porous portion with respect to the (Nmax)th region, and a (Nmin)th region indicating Amin satisfy a relationship of {(Amax/Amin−1)×100}/(Nmax−Nmin)≤6, 85≤Amax, and 2≤Nmax.
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3.发明申请公开(公告)号：US20200373090A1
公开(公告)日：2020-11-26
申请号：US16984800
申请日：2020-08-04
Inventor： MITSUHISA YOSHIMURA , TATSUJI AOYAMA , NAOMI KURIHARA , MIWA OGAWA
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.
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公开(公告)号：US20230131142A1
公开(公告)日：2023-04-27
申请号：US17905498
申请日：2021-01-29
Inventor： HIDEYUKI KURAHASHI , NAOMI KURIHARA , MITSUHISA YOSHIMURA
Abstract: An electrode foil for an electrolytic capacitor includes: an anode body that includes a core part and a porous part disposed on a surface of the core part, and contains a first metal; a first dielectric layer that covers at least a part of the porous part; and a second dielectric layer that covers at least a part of the first dielectric layer. The second dielectric layer contains an oxide of a second metal. The first dielectric layer includes a first part having a thickness T1 and a second part having a thickness T2 smaller than the thickness T1.
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公开(公告)号：US20220115185A1
公开(公告)日：2022-04-14
申请号：US17426039
申请日：2020-02-19
Inventor： NAOMI KURIHARA , AKIHIRO YAMAGUCHI , MITSUHISA YOSHIMURA , MIWA OGAWA
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.
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Patent Agency Ranking
6.发明申请公开(公告)号：US20210366661A1
公开(公告)日：2021-11-25
申请号：US17396767
申请日：2021-08-09
Inventor： MITSUHISA YOSHIMURA , NAOMI KURIHARA , MIWA OGAWA , YASUHIRO TSUDA
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.
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公开(公告)号：US20190333703A1
公开(公告)日：2019-10-31
申请号：US16503657
申请日：2019-07-05
Inventor： KOUTA MUNEYASU , MASAHIRO SATO , NAOMI KURIHARA , KEITA UENAKA
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.
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公开(公告)号：US20220301786A1
公开(公告)日：2022-09-22
申请号：US17637199
申请日：2020-09-04
Inventor： MIWA OGAWA , NAOMI KURIHARA
Abstract: An electrode foil for an electrolytic capacitor includes: an anode body including a first metal; a first dielectric layer covering at least a part of the anode body and including an oxide of the first metal; and a second dielectric layer covering at least a part of the first dielectric layer and including an oxide of a second metal. The first metal includes at least one selected from the group consisting of titanium, tantalum, niobium, and aluminum. And the second metal includes at least one selected from the group consisting of silicon, zirconium, hafnium, and tantalum. A thickness T2 of the second dielectric layer is smaller than a thickness T1 of the first dielectric layer.
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9.发明申请公开(公告)号：US20210366660A1
公开(公告)日：2021-11-25
申请号：US17396635
申请日：2021-08-06
Inventor： MIWA OGAWA , NAOMI KURIHARA , MITSUHISA YOSHIMURA
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.
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公开(公告)号：US20200006011A1
公开(公告)日：2020-01-02
申请号：US16558271
申请日：2019-09-02
Inventor： MIWA OGAWA , NAOMI KURIHARA
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.
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