Patents by Inventor Kenichi Chatani
Kenichi Chatani 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: 11911821Abstract: A compressed powder body comprises metal particles and an interposed substance which is interposed between the metal particles. Each of the metal particles is made of FeSiAl-based soft magnetic alloy and has a flat shape when seen along a predetermined direction. The metal particles include one or more of the metal particles each of which is formed with one or more predetermined holes. Each of the predetermined holes passes through the metal particle in the predetermined direction. Each of the predetermined holes has a maximum width in a predetermined plane perpendicular to the predetermined direction the maximum width being equal to or larger than a thickness of the metal particle with the predetermined hole in the predetermined direction.Type: GrantFiled: November 18, 2022Date of Patent: February 27, 2024Assignee: TOKIN CORPORATIONInventors: Mariko Fujiwara, Kaori Ohdaira, Chieko Fujimoto, Kenichi Chatani
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Patent number: 11710588Abstract: A forming method of a composite magnetic sheet. The forming method comprises a preparing step, a forming step and a heat-treating step. In the preparing step, magnetic slurry is prepared by mixing at least a soft magnetic powder having a flat shape, a first resin having a solid component and a second resin having a solid component, weight loss of the solid component of the first resin being 4.0% or less at 220° C., weight loss of the solid component of the second resin being 5.0% or more at 220° C. In the forming step, the magnetic slurry is formed into an intermediate body having a sheet-like shape. In the heat-treating step, the intermediate body is heat-treated at a heat-treatment temperature between 220° C. and 400° C. (both inclusive).Type: GrantFiled: June 14, 2021Date of Patent: July 25, 2023Assignee: TOKIN CORPORATIONInventors: Keitaro Tanno, Shun Mikoshiba, Kenichi Chatani
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Publication number: 20230166325Abstract: A compressed powder body comprises metal particles and an interposed substance which is interposed between the metal particles. Each of the metal particles is made of FeSiAl-based soft magnetic alloy and has a flat shape when seen along a predetermined direction. The metal particles include one or more of the metal particles each of which is formed with one or more predetermined holes. Each of the predetermined holes passes through the metal particle in the predetermined direction. Each of the predetermined holes has a maximum width in a predetermined plane perpendicular to the predetermined direction the maximum width being equal to or larger than a thickness of the metal particle with the predetermined hole in the predetermined direction.Type: ApplicationFiled: November 18, 2022Publication date: June 1, 2023Applicant: TOKIN CORPORATIONInventors: Mariko FUJIWARA, Kaori OHDAIRA, Chieko FUJIMOTO, Kenichi CHATANI
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Patent number: 11610710Abstract: A module includes a circuit board and an inductor. The circuit board has a facing surface and a rear surface which are located at opposite sides to each other in an up-down direction. The inductor has a magnetic core and a coil. The magnetic core is made of a soft magnetic metal material. The magnetic core has a facing surface and a radiating surface which are located at opposite sides to each other in the up-down direction. The facing surface of the magnetic core is arranged to face the facing surface of the circuit board in the up-down direction. The radiating surface of the magnetic core is arranged to be radiatable heat outward. The coil has a coil portion and a connection end. The coil portion winds, at least in part, the magnetic core. The connection end is connected to the facing surface of the circuit board.Type: GrantFiled: December 5, 2019Date of Patent: March 21, 2023Assignee: TOKIN CORPORATIONInventors: Kenichi Chatani, Kenji Ikeda, Toshinori Tsuda
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Publication number: 20220399144Abstract: A forming method of a composite magnetic sheet. The forming method comprises a preparing step, a forming step and a heat-treating step. In the preparing step, magnetic slurry is prepared by mixing at least a soft magnetic powder having a flat shape, a first resin having a solid component and a second resin having a solid component, weight loss of the solid component of the first resin being 4.0% or less at 220° C., weight loss of the solid component of the second resin being 5.0% or more at 220° C. In the forming step, the magnetic slurry is formed into an intermediate body having a sheet-like shape. In the heat-treating step, the intermediate body is heat-treated at a heat-treatment temperature between 220° C. and 400° C. (both inclusive).Type: ApplicationFiled: June 14, 2021Publication date: December 15, 2022Applicant: TOKIN CORPORATIONInventors: Keitaro TANNO, Shun MIKOSHIBA, Kenichi CHATANI
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Patent number: 11383487Abstract: A laminated substrate includes an upper prepreg cured body, a lower prepreg cured body and a magnetic member. The magnetic member is sandwiched between the upper prepreg cured body and the lower prepreg cured body in an up-down direction. The upper prepreg cured body is directly coupled to the lower prepreg cured body all over a predetermined area surrounding the magnetic member in a plane perpendicular to the up-down direction. The magnetic member is formed by binding soft magnetic metal powder using a binder. The soft magnetic metal powder consists of particles each of which has a flat shape. The binder comprises inorganic oxide as a chief ingredient. The magnetic member includes the soft magnetic metal powder of 60 vol. % or more and open pores of 10 vol. % or more and 30 vol. % or less. The magnetic member has a thickness of 0.3 mm or less.Type: GrantFiled: January 14, 2019Date of Patent: July 12, 2022Assignee: TOKIN CORPORATIONInventors: Hiroshi Shima, Shun Mikoshiba, Kenichi Chatani
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Patent number: 10943725Abstract: A laminated substrate embedded type inductor includes a laminated resin substrate in which a pair of first resin substrates are laminated, a sheet-shaped magnetic core placed in the laminated resin substrate, via holes provided so as to pass through the laminated resin substrate, and a coil formed via the via holes. The laminated resin substrate contains an adhesive component, wherein the sheet-shaped magnetic core is a molded body obtained by forming a soft magnetic flat metal powder into a flat plate, the soft magnetic flat metal powder is oriented in a plane of the flat plate, and a generated magnetic flux of the coil circulates in the plane of the flat plate, and wherein the magnetic core is integrated with the laminated resin substrate so that the adhesive component is impregnated in pores of the magnetic core.Type: GrantFiled: September 14, 2018Date of Patent: March 9, 2021Assignee: TOKIN CORPORATIONInventors: Kenichi Chatani, Naoharu Yamamoto, Shigeyoshi Yoshida
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Publication number: 20200111593Abstract: A module includes a circuit board and an inductor. The circuit board has a facing surface and a rear surface which are located at opposite sides to each other in an up-down direction. The inductor has a magnetic core and a coil. The magnetic core is made of a soft magnetic metal material. The magnetic core has a facing surface and a radiating surface which are located at opposite sides to each other in the up-down direction. The facing surface of the magnetic core is arranged to face the facing surface of the circuit board in the up-down direction. The radiating surface of the magnetic core is arranged to be radiatable heat outward. The coil has a coil portion and a connection end. The coil portion winds, at least in part, the magnetic core. The connection end is connected to the facing surface of the circuit board.Type: ApplicationFiled: December 5, 2019Publication date: April 9, 2020Applicant: TOKIN CORPORATIONInventors: Kenichi CHATANI, Kenji IKEDA, Toshinori TSUDA
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Patent number: 10546678Abstract: A module comprises a circuit board and an inductor. The circuit board has a facing surface and a rear surface which are located at opposite sides to each other in an up-down direction. The inductor has a magnetic core and a coil. The magnetic core is made of a soft magnetic metal material. The magnetic core has a facing surface and a radiating surface which are located at opposite sides to each other in the up-down direction. The facing surface of the magnetic core is arranged to face the facing surface of the circuit board in the up-down direction. The radiating surface of the magnetic core is arranged to be radiatable heat outward. The coil has a coil portion and a connection end. The coil portion winds, at least in part, the magnetic core. The connection end is connected to the facing surface of the circuit board.Type: GrantFiled: February 3, 2014Date of Patent: January 28, 2020Assignee: TOKIN CORPORATIONInventors: Kenichi Chatani, Kenji Ikeda, Toshinori Tsuda
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Patent number: 10515751Abstract: A soft magnetic molded body, in which a binder component is used to bind a soft magnetic metal powder that has a flat shape, includes 60% by volume or more of the soft magnetic metal powder and 10-30% by volume of fine open pores. The binder component includes an inorganic oxide as a main component.Type: GrantFiled: March 13, 2015Date of Patent: December 24, 2019Assignee: TOKIN CORPORATIONInventors: Kenichi Chatani, Kenji Ikeda, Toshinori Tsuda
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Publication number: 20190224943Abstract: A laminated substrate includes an upper prepreg cured body, a lower prepreg cured body and a magnetic member. The magnetic member is sandwiched between the upper prepreg cured body and the lower prepreg cured body in an up-down direction. The upper prepreg cured body is directly coupled to the lower prepreg cured body all over a predetermined area surrounding the magnetic member in a plane perpendicular to the up-down direction. The magnetic member is formed by binding soft magnetic metal powder using a binder. The soft magnetic metal powder consists of particles each of which has a flat shape. The binder comprises inorganic oxide as a chief ingredient. The magnetic member includes the soft magnetic metal powder of 60 vol. % or more and open pores of 10 vol. % or more and 30 vol. % or less. The magnetic member has a thickness of 0.3 mm or less.Type: ApplicationFiled: January 14, 2019Publication date: July 25, 2019Applicant: TOKIN CORPORATIONInventors: Hiroshi SHIMA, Shun MIKOSHIBA, Kenichi CHATANI
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Publication number: 20190043654Abstract: A laminated substrate embedded type inductor includes a laminated resin substrate in which a pair of first resin substrates are laminated, a sheet-shaped magnetic core placed in the laminated resin substrate, via holes provided so as to pass through the laminated resin substrate, and a coil formed via the via holes. The laminated resin substrate contains an adhesive component, wherein the sheet-shaped magnetic core is a molded body obtained by forming a soft magnetic flat metal powder into a flat plate, the soft magnetic flat metal powder is oriented in a plane of the flat plate, and a generated magnetic flux of the coil circulates in the plane of the flat plate, and wherein the magnetic core is integrated with the laminated resin substrate so that the adhesive component is impregnated in pores of the magnetic core.Type: ApplicationFiled: September 14, 2018Publication date: February 7, 2019Applicant: TOKIN CORPORATIONInventors: Kenichi CHATANI, Naoharu YAMAMOTO, Shigeyoshi YOSHIDA
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Patent number: 9716317Abstract: An antenna device, which has wide-angle directivity and a configuration suitable to be used in a portable electronic apparatus, includes a flat board-like substantially rectangular soft magnetic body, and a loop-shaped coil disposed from a front surface to a rear surface of the soft magnetic body such that a region surrounded by the coil includes at least a part of a specific edge, i.e., one edge out of four edges of the soft magnetic body, and does not include a facing edge that faces the specific edge.Type: GrantFiled: April 22, 2011Date of Patent: July 25, 2017Assignee: NEC TOKIN CORPORATIONInventors: Kenichi Chatani, Naoharu Yamamoto, Toshiaki Oka, Takashi Otsuki
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Publication number: 20170117081Abstract: A soft magnetic molded body, in which a binder component is used to bind a soft magnetic metal powder that has a flat shape, includes 60% by volume or more of the soft magnetic metal powder and 10-30% by volume of fine open pores. The binder component includes an inorganic oxide as a main component.Type: ApplicationFiled: March 13, 2015Publication date: April 27, 2017Applicant: NEC TOKIN CORPORATIONInventors: Kenichi CHATANI, Kenji IKEDA, Toshinori TSUDA
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Publication number: 20150235753Abstract: A sheet-shaped inductor includes a magnetic core and a coil. First and second via holes respectively pass through, in a lamination direction, two surfaces facing each other of the magnetic core. The coil includes first and second via conductors having end portions respectively protruding to the outside from the first and second via holes, and first and second surface conductors joined to both ends of the first and second via conductors via plug portions. The magnetic core is composed of a sheet obtained by molding a mixture containing a soft magnetic flat metal powder and a binder so that the soft magnetic flat metal powder is oriented in a flat plane formed by the inductor, or is composed of a plurality of such sheets laminated and pressed in a lamination direction. A laminated substrate embedded type inductor is configured so that a magnetic core is embedded in a laminated substrate.Type: ApplicationFiled: September 10, 2013Publication date: August 20, 2015Applicant: NEC TOKIN CORPORATIONInventors: Kenichi Chatani, Naoharu Yamamoto, Shigeyoshi Yoshida
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Patent number: 8896407Abstract: An inductor comprises a magnetic core and a coil. The magnetic core has a wound portion around which the coil is wound, and a peripheral portion. The magnetic core is formed from two or more preliminarily-formed-bodies which are pressure-molded in a state where the coil winds one or more preliminarily-formed-bodies which form the wound portion. The preliminarily-formed-bodies include at least one preliminarily-formed-body which forms the peripheral portion while not form the wound portion. Each of the preliminarily-formed-bodies is made of a mixture of flat magnetic powders and an organic binder so as to have a plate-like shape. The flat magnetic powders are oriented so as to be parallel to the preliminarily-formed-body.Type: GrantFiled: November 14, 2012Date of Patent: November 25, 2014Assignee: NEC TOKIN CorporationInventors: Kenichi Chatani, Naoharu Yamamoto
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Publication number: 20140218147Abstract: A module comprises a circuit board and an inductor. The circuit board has a facing surface and a rear surface which are located at opposite sides to each other in an up-down direction. The inductor has a magnetic core and a coil. The magnetic core is made of a soft magnetic metal material. The magnetic core has a facing surface and a radiating surface which are located at opposite sides to each other in the up-down direction. The facing surface of the magnetic core is arranged to face the facing surface of the circuit board in the up-down direction. The radiating surface of the magnetic core is arranged to be radiatable heat outward. The coil has a coil portion and a connection end. The coil portion winds, at least in part, the magnetic core. The connection end is connected to the facing surface of the circuit board.Type: ApplicationFiled: February 3, 2014Publication date: August 7, 2014Applicant: NEC TOKIN CORPORATIONInventors: Kenichi CHATANI, Kenji IKEDA, Toshinori TSUDA
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Publication number: 20140035790Abstract: An antenna device, which has wide-angle directivity and a configuration suitable to be used in a portable electronic apparatus, includes a flat board-like substantially rectangular soft magnetic body, and a loop-shaped coil disposed from a front surface to a rear surface of the soft magnetic body such that a region surrounded by the coil includes at least a part of a specific edge, i.e., one edge out of four edges of the soft magnetic body, and does not include a facing edge that faces the specific edge.Type: ApplicationFiled: April 22, 2011Publication date: February 6, 2014Applicant: NEC TOKIN CORPORATIONInventors: Kenichi Chatani, Naoharu Yamamoto, Toshiaki Oka, Takashi Otsuki