公开(公告)号：US20230274890A1

公开(公告)日：2023-08-31

申请号：US18003692

申请日：2021-07-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： MIWA OGAWA ,  NAOMI KURIHARA ,  MITSUHISA YOSHIMURA

IPC: H01G9/048 ,  H01G9/045

CPC classification number: H01G9/048 ,  H01G9/045

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.

公开(公告)号：US20250104930A1

公开(公告)日：2025-03-27

申请号：US18687354

申请日：2022-08-17

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： NAOMI KURIHARA ,  HIDEYUKI KURAHASHI ,  MIWA OGAWA

IPC: H01G9/055 ,  H01G9/045

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.

公开(公告)号：US20200373090A1

公开(公告)日：2020-11-26

申请号：US16984800

申请日：2020-08-04

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： MITSUHISA YOSHIMURA ,  TATSUJI AOYAMA ,  NAOMI KURIHARA ,  MIWA OGAWA

IPC: H01G9/048 ,  H01G9/07 ,  H01G9/00 ,  H01G9/02

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.

公开(公告)号：US20220115185A1

公开(公告)日：2022-04-14

申请号：US17426039

申请日：2020-02-19

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： NAOMI KURIHARA ,  AKIHIRO YAMAGUCHI ,  MITSUHISA YOSHIMURA ,  MIWA OGAWA

IPC: H01G9/00 ,  H01G13/00 ,  C23C16/40 ,  C23C16/02

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.

公开(公告)号：US20210366661A1

公开(公告)日：2021-11-25

申请号：US17396767

申请日：2021-08-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： MITSUHISA YOSHIMURA ,  NAOMI KURIHARA ,  MIWA OGAWA ,  YASUHIRO TSUDA

IPC: H01G9/055 ,  H01G9/045 ,  H01G9/07

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.

公开(公告)号：US20180358181A1

公开(公告)日：2018-12-13

申请号：US16106210

申请日：2018-08-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： MIWA OGAWA ,  AYUMI KOCHI ,  YASUHIRO TSUDA

IPC: H01G9/00 ,  H01G9/055 ,  H01G9/025 ,  H01G9/035 ,  H01G9/045 ,  C23C16/02 ,  C23C16/40 ,  C25D11/16

CPC classification number: H01G9/0032 ,  C23C16/0227 ,  C23C16/0272 ,  C23C16/40 ,  C23C16/45525 ,  C25D11/10 ,  C25D11/16 ,  H01G9/0036 ,  H01G9/025 ,  H01G9/035 ,  H01G9/04 ,  H01G9/042 ,  H01G9/045 ,  H01G9/055

Abstract: An electrolytic capacitor has an electrode foil that includes a metal foil containing a first metal, a first dielectric layer disposed on the metal foil, and a second dielectric layer disposed on the first dielectric layer. A method for manufacturing the electrolytic capacitor includes subjecting a roughening treatment to the metal foil and forming the second dielectric layer on a roughened surface of the metal foil by an atomic layer deposition method. The second dielectric layer contains an oxide of a second metal. The method further includes forming the first dielectric layer containing an oxide of the first metal between the metal foil and the second dielectric layer by subjecting the metal foil to an anodization treatment.

公开(公告)号：US20220301786A1

公开(公告)日：2022-09-22

申请号：US17637199

申请日：2020-09-04

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： MIWA OGAWA ,  NAOMI KURIHARA

IPC: H01G9/042 ,  H01G9/07 ,  H01G9/025 ,  H01G9/00 ,  H01G9/035

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.

公开(公告)号：US20210366660A1

公开(公告)日：2021-11-25

申请号：US17396635

申请日：2021-08-06

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： MIWA OGAWA ,  NAOMI KURIHARA ,  MITSUHISA YOSHIMURA

IPC: H01G9/045 ,  H01G9/00 ,  H01G9/055 ,  H01G9/07 ,  H01G9/15

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.

公开(公告)号：US20200006011A1

公开(公告)日：2020-01-02

申请号：US16558271

申请日：2019-09-02

Applicant: Panasonic Intellectual Property Management Co., ltd.

Inventor： MIWA OGAWA ,  NAOMI KURIHARA

IPC: H01G9/045 ,  H01G9/00 ,  H01G9/15

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.