Patents by Inventor Yasuhide Yamashita
Yasuhide Yamashita 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: 11783988Abstract: A method of manufacturing an inductor element includes preparing an insert member including a winding portion where a conductor is wound in a coil shape. A plurality of preliminary green compacts is obtained by conducting a preliminary compression molding of a granule containing a magnetic powder and a resin at a pressure of 2.5×102 to 1×103 MPa. The insert member and the plurality of preliminary green compacts are integrated so that a joint interface of the plurality of preliminary green compacts is formed intermittently.Type: GrantFiled: September 11, 2020Date of Patent: October 10, 2023Assignee: TDK CORPORATIONInventors: Yasuhide Yamashita, Katsushi Yasuhara, Chiomi Sato
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Patent number: 11651880Abstract: A composite particle includes a large particle and binder particles. The large particle has a particle size of 10 ?m to 50 ?m. The binder particles are attached on the large particle and each have a particle size smaller than that of the large particle.Type: GrantFiled: March 24, 2020Date of Patent: May 16, 2023Assignee: TDK CORPORATIONInventor: Yasuhide Yamashita
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Patent number: 11605490Abstract: The present invention is an inductor element having a conductor wound in a coil form, and a core part surrounding the coil and including a magnetic powder and a resin. The core part includes a top board part and a bottom board part respectively covering both ends of the coil, and an outer circumference part positioned at an outer circumference side of the coil, and a resin content of the outer circumference part is larger than a resin content of the top board part and also larger than a resin content of the bottom board part.Type: GrantFiled: April 7, 2020Date of Patent: March 14, 2023Assignee: TDK CORPORATIONInventors: Yasuhide Yamashita, Chiomi Sato
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Publication number: 20220311007Abstract: A positive electrode for a lithium ion secondary battery includes a current collector and a positive electrode active material layer in contact with at least one surface of the current collector, wherein the positive electrode active material layer contains a plurality of positive electrode active materials and a plurality of fibrous carbons, the positive electrode active material layer has a plurality of pores therein, at least a part of the plurality of fibrous carbons is intertwined with each other to form a carbon network, and the carbon network is formed on a surface facing one of the plurality of pores.Type: ApplicationFiled: March 21, 2022Publication date: September 29, 2022Inventors: Hiroki KARISYUKU, Takashi MORI, Yasuhide YAMASHITA, Kotaro TERAO
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Patent number: 11401208Abstract: A substrate includes a fabric-like member. First inorganic fillers exist on a surface of the fabric-like member.Type: GrantFiled: March 31, 2020Date of Patent: August 2, 2022Assignee: TDK CORPORATIONInventors: Yasuhide Yamashita, Masaaki Yamashita
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Publication number: 20210391112Abstract: An electronic component having excellent DC superimposition characteristic and initial magnetic permeability, a core used for the electronic component, and a element body constituting the core are provided. The element body has magnetic large particles and at least one spacer region, wherein one or more small particles having an average particle size smaller than that of the magnetic large particles exist as spacers to form the spacer region between the large particles in a field of view within a predetermined range where 10 or more and 40 or less of the large particles are observable in a cross section of the element body.Type: ApplicationFiled: April 28, 2021Publication date: December 16, 2021Applicant: TDK CORPORATIONInventors: Yasuhide YAMASHITA, Kotaro TERAO, Shinsuke HASHIMOTO
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Publication number: 20210335526Abstract: A core can be used for an electronic component, and composite particles constitute the core. The composite particles contain magnetic large particles, small particles directly or indirectly attached to surfaces of the large particles and have an average particle size smaller than an average particle size of the large particles, and a mutual buffer film covering at least part of the surfaces of the large particles located between the small particles existing around the large particles. When the average particle size of the large particles is R, the average particle size of the small particles is r, and an average thickness of the mutual buffer film is t, (r/R) is 0.0012 or more and 0.025 or less, (t/r) is larger than 0 and 0.7 or less, and r is 12 nm or more and 100 nm or less.Type: ApplicationFiled: April 28, 2021Publication date: October 28, 2021Applicant: TDK CORPORATIONInventors: Yasuhide YAMASHITA, Kotaro TERAO, Shinsuke HASHIMOTO
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Patent number: 11043320Abstract: A dust core includes a metal magnetic material, a resin, and an insulation film. The insulation film contacts with a surface of the metal magnetic material and covers the metal magnetic material. The insulation film includes a first film and a second film. The first film contacts with the surface of the metal magnetic material. The second film contacts with a surface of the first film. A density of the first film is higher than a density of the second film.Type: GrantFiled: March 8, 2018Date of Patent: June 22, 2021Assignee: TDK CORPORATIONInventors: Masahiro Kamiya, Yasuhide Yamashita, Chiomi Sato, Yousuke Futamata, Ryoma Nakazawa, Takeshi Takahashi, Hiroyuki Ono
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Patent number: 10984941Abstract: An inductor element includes a wire-winding portion and a core portion. In the wire-winding portion, a conductor is wound in a coil shape. The core portion surrounds the wire-winding portion and contains a magnetic powder and a resin. An inner-core central region is a region of the core portion within a distance from a winding axis center of the wire-winding portion toward an existing region of the wire-winding portion in an outward direction perpendicular to the winding axis center. A top-plate central region is a region of the core portion within a distance from the winding axis center toward a no-existing region of the wire-winding portion in the outward direction. S??S???2% is satisfied, where S? (%) and S? (%) are respectively an area ratio of the magnetic powder in the inner-core central region and the top-plate central region.Type: GrantFiled: May 1, 2018Date of Patent: April 20, 2021Assignee: TDK CORPORATIONInventors: Yasuhide Yamashita, Katsushi Yasuhara, Chiomi Sato, Syota Goto
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Patent number: 10886056Abstract: An inductor element includes a wire-winding portion and a core portion. In the wire-winding portion, a conductor is wound in a coil shape. The core portion surrounds the wire-winding portion and contains a magnetic powder and a resin. The wire-winding portion includes an inner circumferential surface. A winding-wire inner circumferential neighboring region is a region of the core portion within a distance from the inner circumferential surface toward a winding axis of the wire-winding portion. An inner-core central region is a region of the core portion within a distance from the winding axis center toward an existing region of the wire-winding portion in an outward direction perpendicular to the winding axis center. S??S?1?5.0% is satisfied, where S?(%) and S?1(%) are respectively an area ratio of a magnetic powder in the inner-core central region and the winding-wire inner circumferential neighboring region.Type: GrantFiled: May 1, 2018Date of Patent: January 5, 2021Assignee: TDK CORPORATIONInventors: Yasuhide Yamashita, Katsushi Yasuhara, Chiomi Sato
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Publication number: 20200411226Abstract: A method of manufacturing an inductor element includes preparing an insert member including a winding portion where a conductor is wound in a coil shape. A plurality of preliminary green compacts is obtained by conducting a preliminary compression molding of a granule containing a magnetic powder and a resin at a pressure of 2.5×102 to 1×103 MPa. The insert member and the plurality of preliminary green compacts are integrated so that a joint interface of the plurality of preliminary green compacts is formed intermittently.Type: ApplicationFiled: September 11, 2020Publication date: December 31, 2020Applicant: TDK CORPORATIONInventors: Yasuhide YAMASHITA, Katsushi YASUHARA, Chiomi SATO
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Publication number: 20200328021Abstract: The present invention is an inductor element having a conductor wound in a coil form, and a core part surrounding the coil and including a magnetic powder and a resin. The core part includes a top board part and a bottom board part respectively covering both ends of the coil, and an outer circumference part positioned at an outer circumference side of the coil, and a resin content of the outer circumference part is larger than a resin content of the top board part and also larger than a resin content of the bottom board part.Type: ApplicationFiled: April 7, 2020Publication date: October 15, 2020Applicant: TDK CORPORATIONInventors: Yasuhide YAMASHITA, Chiomi SATO
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Patent number: 10804026Abstract: A method of manufacturing an inductor element includes preparing an insert member including a winding portion where a conductor is wound in a coil shape. A plurality of preliminary green compacts is obtained by conducting a preliminary compression molding of a granule containing a magnetic powder and a resin at a pressure of 2.5×102 to 1×103 MPa. The insert member and the plurality of preliminary green compacts are integrated so that a joint interface of the plurality of preliminary green compacts is formed intermittently.Type: GrantFiled: December 20, 2017Date of Patent: October 13, 2020Assignee: TDK CORPORATIONInventors: Yasuhide Yamashita, Katsushi Yasuhara, Chiomi Sato
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Publication number: 20200317567Abstract: A substrate includes a fabric-like member. First inorganic fillers exist on a surface of the fabric-like member.Type: ApplicationFiled: March 31, 2020Publication date: October 8, 2020Applicant: TDK CORPORATIONInventors: Yasuhide YAMASHITA, Masaaki YAMASHITA
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Publication number: 20200312502Abstract: A composite particle includes a large particle and binder particles. The large particle has a particle size of 10 ?m to 50 ?m. The binder particles are attached on the large particle and each have a particle size smaller than that of the large particle.Type: ApplicationFiled: March 24, 2020Publication date: October 1, 2020Applicant: TDK CORPORATIONInventor: Yasuhide YAMASHITA
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Publication number: 20180322998Abstract: An inductor element includes a wire-winding portion and a core portion. In the wire-winding portion, a conductor is wound in a coil shape. The core portion surrounds the wire-winding portion and contains a magnetic powder and a resin. An inner-core central region is a region of the core portion within a distance from a winding axis center of the wire-winding portion toward an existing region of the wire-winding portion in an outward direction perpendicular to the winding axis center. A top-plate central region is a region of the core portion within a distance from the winding axis center toward a no-existing region of the wire-winding portion in the outward direction. S??S???2% is satisfied, where S? (%) and s? (%) are respectively an area ratio of the magnetic powder in the inner-core central region and the top-plate central region.Type: ApplicationFiled: May 1, 2018Publication date: November 8, 2018Applicant: TDK CORPORATIONInventors: Yasuhide YAMASHITA, Katsushi YASUHARA, Chiomi SATO, Syota GOTO
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Publication number: 20180322997Abstract: An inductor element includes a wire-winding portion and a core portion. In the wire-winding portion, a conductor is wound in a coil shape. The core portion surrounds the wire-winding portion and contains a magnetic powder and a resin. The wire-winding portion includes an inner circumferential surface. A winding-wire inner circumferential neighboring region is a region of the core portion within a distance from the inner circumferential surface toward a winding axis of the wire-winding portion. An inner-core central region is a region of the core portion within a distance from the winding axis center toward an existing region of the wire-winding portion in an outward direction perpendicular to the winding axis center. S??S?1?5.0% is satisfied, where S?(%) and S?1 (%) are respectively an area ratio of a magnetic powder in the inner-core central region and the winding-wire inner circumferential neighboring region.Type: ApplicationFiled: May 1, 2018Publication date: November 8, 2018Applicant: TDK CORPORATIONInventors: Yasuhide YAMASHITA, Katsushi YASUHARA, Chiomi SATO
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Publication number: 20180294084Abstract: A dust core includes a metal magnetic material, a resin, and an insulation film. The insulation film contacts with a surface of the metal magnetic material and covers the metal magnetic material. The insulation film includes a first film and a second film. The first film contacts with the surface of the metal magnetic material. The second film contacts with a surface of the first film. A density of the first film is higher than a density of the second film.Type: ApplicationFiled: March 8, 2018Publication date: October 11, 2018Applicant: TDK CORPORATIONInventors: Masahiro KAMIYA, Yasuhide YAMASHITA, Chiomi SATO, Yousuke FUTAMATA, Ryoma NAKAZAWA, Takeshi TAKAHASHI, Hiroyuki ONO
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Publication number: 20180204661Abstract: A method of manufacturing an inductor element includes preparing an insert member including a winding portion where a conductor is wound in a coil shape. A plurality of preliminary green compacts is obtained by conducting a preliminary compression molding of a granule containing a magnetic powder and a resin at a pressure of 2.5×102 to 1×103 MPa. The insert member and the plurality of preliminary green compacts are integrated so that a joint interface of the plurality of preliminary green compacts is formed intermittently.Type: ApplicationFiled: December 20, 2017Publication date: July 19, 2018Applicant: TDK CORPORATIONInventors: Yasuhide YAMASHITA, Katsushi YASUHARA, Chiomi SATO
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Patent number: 9465230Abstract: A lens holding unit is held so that it can relatively move with respect to a base part to a direction vertical to an optical axis direction. The lens holding unit has a lens holder, a magnet part, and a spring. The lens holder has a first coil. The magnet part has a first magnet part which includes a first face facing to the first coil and a second magnet part which includes a second face vertical to the first face and constitutes a magnetic domain different from that of the first magnet part. These first magnet part and second magnet part are integrated.Type: GrantFiled: April 11, 2014Date of Patent: October 11, 2016Assignee: TDK CorporationInventors: Masaru Uno, Kazutomo Imi, Noriyuki Kawano, Kazuhiko Inoue, Masashi Gotoh, Osamu Ohhata, Shintarou Koike, Yasuhide Yamashita