Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Mitsuhisa Yoshimura

Naomi Kurihara

Miwa Ogawa

Hideki Kuwajima

Hideyuki Hashi

Hiroshi Yoshida

Masanori Okabayashi

Masami Tsubaki

Hiromi Nakanishi

Tatsuji Aoyama

Masakazu Tanahashi

Kyohei Kobayashi

Kenji Yoshida

Takahiro Suzuki

Yukiyasu Sugihara

Zhisheng Deng

Shinji Kabeya

Daisuke Suzuki

Kounosuke Hashio

Yuichiro Tsubaki

Kazuhiro Takatani

Hiroyuki Nakano

Yasuhiro Tsuda

Kazuo Fujiwara

Koichi Kojima

Katsuyuki Nakamura

Miyoko Masuda

Hayato Kato

Kazunari Hayashi

Seita Takahashi

Kazuaki Nakanishi

Takehiko Nakahara

Hideyuki Kurahashi

Natsuyo Sasada

Shosuke Nakano

Katsuyoshi Shingu

Akihiro Yamaguchi

Tatsushi Ota

An electrode foil for an electrolytic capacitor includes an anode body having a porous portion and a core part continuous with the porous portion, a dielectric layer covering a surface of a metal skeleton forming the porous portion, wherein an interface layer including a first element is present between the metal skeleton and the dielectric layer, and the first element is at least one selected from the group consisting of sulfur, nitrogen, and phosphorus.

Electrode foil for electrolytic capacitors, electrolytic capacitor, method for producing electrode foil for electrolytic capacitors, and method for producing electrolytic capacitor

A cathode foil for electrolytic capacitors includes a metal porous part, a metal core part that is continuous with the metal porous part, and a coating film covering the metal porous part. Pores in the metal porous part are open at a first main surface of the cathode foil. The coating film is disposed in a region from the first main surface to a depth more than or equal to 10% of a thickness of the metal porous part in a thickness direction of the metal porous part.

Cathode foil comprising porous metal and coating film covering the porous metal and electrolytic capacitor including the same

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 Tand a second part having a thickness Tsmaller than the thickness T.

Electrode foil for electrolytic capacitor, electrolytic capacitor, and method for manufacturing electrolytic capacitor

An electrolytic capacitor includes a capacitor element, a liquid component, a case housing the capacitor element and the liquid component, and a sealing member sealing the case. the capacitor element includes a porous sintered body including a dielectric layer, a cathode foil facing at least a part of the porous sintered body, and a conductive polymer covering at least a part of a surface of the dielectric layer. The conductive polymer is in contact with the cathode foil. And a void in the capacitor element is impregnated with the liquid component.

Electrolytic capacitor

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.

Film production method and electrode foil production method for producing layer containing metal oxide

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.

Electrode foil for electrolytic capacitor, electrolytic capacitor, and methods for producing them

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 first region is greater than a content of the at least one kind of additive element in the second region.

Electrode foil for electrolytic capacitor, electrolytic capacitor, and production methods therefor

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.

Electrode foil for electrolytic capacitor, electrolytic capacitor, and methods for manufacturing same

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.

Electrode foil for electrolytic capacitor, electrolytic capacitor, and method for manufacturing same

A method for producing an electrode foil includes an electrolytic etching step of etching a metal foil containing first metal by applying current between the metal foil and an electrode in etching liquid while a principal surface of the metal foil faces the electrode. A masking member is disposed between the principal surface of the metal foil and the electrode so as to cover a partial region of the principal surface. The masking member is an electric conductor. The masking member is electrically connected with the metal foil.

Electrode foil production method and capacitor production method

A method for producing an electrode foil includes: a first step of preparing a metal foil, the metal foil having a strip shape; a second step of disposing a masking member so as to cover part of a principal surface of the metal foil; and a third step of partially etching the principal surface of the metal foil by applying current between the metal foil and an electrode while the metal foil faces the electrode via the masking member in etching liquid after the second step. The masking member has a strip shape. In the second step, the masking member is disposed along a longitudinal direction of the metal foil so as to be separated from both side edges of the metal foil.

A fluid dispersion obtained by mixing oxide particles and water is sprayed to a raw aluminum foil from a direction opposite to a travelling direction of the raw aluminum foil while the raw aluminum foil is allowed to travel. In this way, a roll-pressed mark of the raw aluminum foil is eliminated, and thus aluminum foil for aluminum electrolytic capacitor electrode is produced. Pyramidal-shaped recesses each having an acute angle tip are present all over a surface of the aluminum foil.

Aluminum foil for aluminum electrolytic capacitor electrode and method for manufacturing the same

A head suspension assembly includes a head, a load beam carrying the head at one end, a resilient member joining the load beam and a carriage, and a pivot bearing provided between the load beam and the carriage and structured so that the load beam is movable in a direction perpendicular to a record medium so that the load beam rocks. The head suspension assembly is structured so that the resilient member has narrow sections for reducing the width of the resilient member to a width smaller than that of both ends of the resilient member that are symmetrical with respect to a centerline of the resilient member. The distal end of the resilient member is joined to the carriage and the resilient member has an opening (hole) in the center thereof. This structure provides a highly shock-resistant and thin head suspension assembly.

Head suspension assembly and disk drive using the same

The disclosed suspension assembly (S) for carrying a magnetic recording head in close following relation to a recording disc includes an improved arrangement for supplying a load to the recording head. The suspension assembly (S) includes a flexible gimbal section () for mounting the recording head and accommodating dampened pitch, roll and transverse movements. The head load arrangement comprises a flexible cantilevered spring tongue () and an elongate rigid load member () that extends from the free end of the spring tongue to contact the suspension assembly (S) adjacent the recording head. The load member () is configured to cause the spring tongue () to resiliently deflect by a predetermined amount, resulting in a predetermined head load being supplied through the load member to the recording head.

Head support device with bearing and elastic member

A head suspension assembly includes (a) a slider having a head for recording into/reproducing from a record medium, mounted thereon, (b) a load beam having (i) the slider disposed via a flexure at one end, and (ii) a leaf-spring-like resilient member integrally formed therewith in the vicinity of the other end along the longitudinal centerline thereof, and (c) a carriage having a pair of pivots in contact with the load beam. The distal end of the resilient member is joined to the carriage and the resilient member has an opening (hole) in the center thereof. Because the stress occurring in the leaf-spring-like resilient member that is provided in the load beam of the head suspension assembly is reduced, the resilient member exerts sufficient urging force to the head and has high flexibility. This structure can provide a highly shock-resistant and thin head suspension assembly.

Growing community of inventors

Osaka, Japan

Mitsuhisa Yoshimura