Patents by Inventor Naoharu Yamamoto
Naoharu Yamamoto 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: 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: 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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Patent number: 9219299Abstract: A resonator is connected to a first plane which is one of a power plane and a ground plane, wherein the power plane and the ground plane are apart from each other in an up-down direction. The resonator comprises a connecting portion and a body portion. The connecting portion is connected to the first plane. The connecting portion extends in the up-down direction beyond a second plane, which is a remaining one of the power plane and the ground plane, while not being in electrical contact with the second plane. The body portion is connected to the connecting portion while not being in contact with the second plane. The body portion is arranged so that the second plane is located between the body portion and the first plane in the up-down direction.Type: GrantFiled: August 21, 2013Date of Patent: December 22, 2015Assignees: NEC TOKIN CORPORATION, NATIONAL UNIVERSITY CORPORATION OKAYAMA UNIVERSITYInventors: Koichi Kondo, Naoharu Yamamoto, Yoshitaka Toyota, Kengo Iokibe, Farhan Zaheed Mahmood
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Publication number: 20150303363Abstract: An object of the present invention is to provide a thermoelectric conversion element that can demonstrate satisfactory thermoelectric conversion performance, and also has flexibility or can be mounted on a surface having irregularities or a curved surface, a method of manufacturing such a thermoelectric conversion element, and a method of using such a thermoelectric conversion element. A thermoelectric conversion element according to the present invention includes a columnar crystal ferrite layer and an electromotive film formed on the columnar crystal ferrite layer. The electromotive film is configured to generate an electromotive force in an in-plane direction by an inverse spin Hall effect. Columnar crystal grains of the columnar crystal ferrite layer include a major axis a of not less than 200 nm and a minor axis b of not more than 500 nm where a>b.Type: ApplicationFiled: October 11, 2013Publication date: October 22, 2015Applicants: NEC CORPORATION, NEC TOKIN CORPORATIONInventors: Akihiro KIRIHARA, Masahiko ISHIDA, Shigeru KOUMOTO, Koichi KONDO, Naoharu YAMAMOTO
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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: 20140055208Abstract: A resonator is connected to a first plane which is one of a power plane and a ground plane, wherein the power plane and the ground plane are apart from each other in an up-down direction. The resonator comprises a connecting portion and a body portion. The connecting portion is connected to the first plane. The connecting portion extends in the up-down direction beyond a second plane, which is a remaining one of the power plane and the ground plane, while not being in electrical contact with the second plane. The body portion is connected to the connecting portion while not being in contact with the second plane. The body portion is arranged so that the second plane is located between the body portion and the first plane in the up-down direction.Type: ApplicationFiled: August 21, 2013Publication date: February 27, 2014Applicants: NATIONAL UNIVERSITY CORPORATION OKAYAMA UNIVERSITY, NEC TOKIN CORPORATIONInventors: Koichi KONDO, Naoharu YAMAMOTO, Yoshitaka TOYOTA, Kengo IOKIBE, Farhan Zaheed MAHMOOD
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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
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Patent number: 7167140Abstract: A coil antenna having a magnetic core and a wire wound around the magnetic core. The magnetic core is flexible and bendable and is made of a mixture including soft magnetic powder and an organic binder agent. The soft magnetic powder comprises a plurality of particles, each of which is coated with an insulator layer which is made of an oxide layer.Type: GrantFiled: July 1, 2004Date of Patent: January 23, 2007Assignee: NEC Tokin CorporationInventors: Yoshihiko Kato, Naoharu Yamamoto, Makoto Teshima
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Patent number: 7030828Abstract: A coil antenna is disclosed comprising a magnetic core and a wire wound around the magnetic core. The magnetic core is made of a mixture comprising soft magnetic powder and an organic binder agent. The magnetic core has a specific complex permeability whose real part ?? is 20 or more over a frequency range of 10 MHz or less and whose imaginary part ?? is 10 or more over a frequency range of 10 MHz or more so that the magnetic core is also servable as a noise suppressor against high-frequency noise.Type: GrantFiled: October 6, 2004Date of Patent: April 18, 2006Assignee: NEC TOKIN CorporationInventors: Yoshihiko Kato, Naoharu Yamamoto, Makoto Teshima, Mitsuharu Sato
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Publication number: 20050237254Abstract: A coil antenna is disclosed comprising a magnetic core and a wire wound around the magnetic core. The magnetic core is made of a mixture comprising soft magnetic powder and an organic binder agent. The magnetic core has a specific complex permeability whose real part ?? is 20 or more over a frequency range of 10 MHz or less and whose imaginary part ?? is 10 or more over a frequency range of 10 MHz or more so that the magnetic core is also servable as a noise suppressor against high-frequency noise.Type: ApplicationFiled: October 6, 2004Publication date: October 27, 2005Applicant: NEC TOKIN CorporationInventors: Yoshihiko Kato, Naoharu Yamamoto, Makoto Teshima, Mitsuharu Sato
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Publication number: 20050024285Abstract: A coil antenna is disclosed comprising a magnetic core and a wire wound around the magnetic core. The magnetic core is flexible and bendable and is made of a mixture comprising soft magnetic powder and an organic binder agent. The soft magnetic powder comprises a plurality of particles each of which is coated with an insulator layer.Type: ApplicationFiled: July 1, 2004Publication date: February 3, 2005Applicant: NEC TOKIN CorporationInventors: Yoshihiko Kato, Naoharu Yamamoto, Makoto Teshima
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Patent number: 5326945Abstract: To detect an impact due to a shock with high precision and stability, a shock sensor is employed which provides a sufficiently long closure interval of a contact of a reed switch (1) enough to carry out signal processing. A gap between an outer surface of a magnet (2) and an inner wall (8) of a housing (7) defining a passage for the magnet (2) comprises a first gap (G1) between a stationary position and an activating position and a second gap (G2) between the activating position and a stop position. The inner wall (8) is formed so that the first gap (G1) is greater than the second gap (G2). The velocity of the magnet (2) is lower when travelling in the second gap (G2) than the velocity in the first gap (G1) because air resistance is greater in the second gap (G2). Accordingly, the closure interval is increased.Type: GrantFiled: December 2, 1992Date of Patent: July 5, 1994Assignees: Tokin Corporation, Sensor Technology Co. Ltd.Inventors: Noriyuki Gotoh, Yasunori Ohtuki, Naoharu Yamamoto, Hiroyuki Sada, Akihiko Kuroiwa, Hiroshi Moriyama
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Patent number: 5137446Abstract: An orthodontic teeth alignment correction wire element made of an alloy represented by the chemical formula of Ti.sub.a Ni.sub.b-c C.sub.c, wherein a+b=100, b=50-52, c=0.25-5.0, or an alloy represented by the chemical formula of Ti.sub.a Ni.sub.b-c-d C.sub.c X.sub.d, wherein X is at least one element selected from V, Cr, Fe, Nb, Ta, W, and Al, wherein a+b=100, b=50-52, c=0.25-5.0, d=0.25-2.0, and exhibits pseudoelasticity at the natural human body temperature. The wire has different recovery forces at different sections therealong by heat treating those sections at controlled temperatures of 400.degree.-600.degree. C. and for controlled time periods of 10-150 minutes and thereafter reheat treating them. An orthodontic coil is made of each of the above-described alloy wires for correction of mismatch of the upper and the lower jaws.Type: GrantFiled: June 7, 1991Date of Patent: August 11, 1992Assignee: Tokin Corporation and Tomy, Inc.Inventors: Kiyoshi Yamauchi, Naoharu Yamamoto