Patents by Inventor Hidenobu Umeda
Hidenobu Umeda 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: 11955275Abstract: A method for producing a multilayer coil component includes forming, on a main face of a substrate, a first coil conductor extending along the main face having conductivity, forming a second coil conductor and a third coil conductor apart from each other in a direction in which the first coil conductor extends and each extending from the first coil conductor in a first direction orthogonal to the main face, and forming a fourth coil conductor electrically connected to an end of the second coil conductor opposite to the first coil conductor and extending along the main face. The forming the first coil conductor includes forming, on the main face, a first insulator layer provided with a first penetration portion having a shape corresponding to the first coil conductor and exposing a part of the main face, and forming, by plating, the first coil conductor in the first penetration portion.Type: GrantFiled: August 27, 2020Date of Patent: April 9, 2024Assignee: TDK CORPORATIONInventors: Yuya Ishima, Shinichi Kondo, Kosuke Ito, Shingo Hattori, Takashi Suzuki, Hidenobu Umeda
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Publication number: 20230402211Abstract: A ferrite composition includes a main component and a sub component. The main component includes an iron oxide in terms of Fe2O3, a copper oxide in terms of CuO, a zinc oxide in terms of ZnO, and a nickel oxide as its remainder. The sub component includes a cobalt oxide in terms of Co3O4, a tin oxide in terms of SnO2, and a bismuth oxide in terms of Bi2O3. A is ?3.5 or more and 1.0 or less, provided that A=(??18)/?; is defined, in which ? is an amount of the zinc oxide represented by mol % in terms of ZnO in the main component, and ? is an amount of the cobalt oxide represented by parts by weight in terms of Co3O4 with respect to 100 parts by weight of the main component.Type: ApplicationFiled: June 6, 2023Publication date: December 14, 2023Applicant: TDK CORPORATIONInventors: Kouichi KAKUDA, Yuya OSHIMA, Kenji KOMORITA, Shigeshi OSAWA, Shinichi KONDO, Hiroyuki TANOUE, Kaori SASAKI, Takuya NIIBORI, Yukio TAKAHASHI, Hidenobu UMEDA
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Publication number: 20230298787Abstract: A soft magnetic metal particle comprises an Fe—Ni based soft magnetic metal. The soft magnetic metal particle includes both an fcc phase and a bcc phase. A magnetic element body includes the soft magnetic metal particle. A coil-type electronic component includes the magnetic element body and a coil conductor.Type: ApplicationFiled: March 16, 2023Publication date: September 21, 2023Applicant: TDK CORPORATIONInventors: Yu SAKURAI, Hidenobu Umeda, Hideyuki Itoh, Ryuichi Wada, Kouichi Kakuda
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Publication number: 20230159380Abstract: A glass ceramic includes feldspar crystal phases, non-crystalline glass phases, Al2O3 phases, and SiO2 phases. At least one pair of the Al2O3 phases is bonded via at least one of the feldspar crystal phases.Type: ApplicationFiled: October 31, 2022Publication date: May 25, 2023Applicant: TDK CORPORATIONInventors: Hidenobu UMEDA, Masaki TAKAHASHI, Kaori SASAKI, Nami ENOMOTO
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Publication number: 20220293332Abstract: A method for manufacturing a multilayer coil component 1 includes: a step of forming a conductor by a photolithography method using photosensitive conductive paste; a step of forming an insulating film covering the conductor by a photolithography method using photosensitive insulating paste; a step of forming a resin layer holding the conductor covered with the insulating film by a positive-type photoresist; a step of forming a plurality of the conductors and the insulating film and then removing the resin layer by irradiating the resin layer with ultraviolet rays and developing the resin layer; and a step of filling the conductor covered with the insulating film with a magnetic material after removing the resin layer.Type: ApplicationFiled: March 7, 2022Publication date: September 15, 2022Applicant: TDK CORPORATIONInventors: Yuya ISHIMA, Kosuke ITO, Shinichi KONDO, Shingo HATTORI, Hidenobu UMEDA
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Publication number: 20210327606Abstract: In a photosensitive conductive paste containing photosensitive organic components, conductor powder, and quartz powder, melting of the quartz powder does not occur or is very unlikely to occur in a heat treatment step, and in the heat treatment step, it functions sufficiently to bring shrinkage rates and shrinkage behaviors of both of a conductor layer and an element body layer closer to each other when they shrink, and thus generation of voids can be inhibited when it is used for manufacturing a laminated coil component.Type: ApplicationFiled: April 14, 2021Publication date: October 21, 2021Applicant: TDK CORPORATIONInventors: Yuya Ishima, Masaki Takahashi, Akira Suda, Takashi Suzuki, Hidenobu Umeda
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Publication number: 20210065975Abstract: A method for producing a multilayer coil component includes forming, on a main face of a substrate, a first coil conductor extending along the main face having conductivity, forming a second coil conductor and a third coil conductor apart from each other in a direction in which the first coil conductor extends and each extending from the first coil conductor in a first direction orthogonal to the main face, and forming a fourth coil conductor electrically connected to an end of the second coil conductor opposite to the first coil conductor and extending along the main face. The forming the first coil conductor includes forming, on the main face, a first insulator layer provided with a first penetration portion having a shape corresponding to the first coil conductor and exposing a part of the main face, and forming, by plating, the first coil conductor in the first penetration portion.Type: ApplicationFiled: August 27, 2020Publication date: March 4, 2021Applicant: TDK CORPORATIONInventors: Yuya ISHIMA, Shinichi KONDO, Kosuke ITO, Shingo HATTORI, Takashi SUZUKI, Hidenobu UMEDA
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Patent number: 9795020Abstract: An ESD (ElectroStatic Discharge) protection component has: first and second discharge electrodes arranged so as to be opposed to each other through a gap; and a discharge inducing portion kept in contact with the first and second discharge electrodes and configured to connect the first and second discharge electrodes to each other. The discharge inducing portion has metal particles, a ceramic material containing glass, and a dielectric material having a dielectric constant higher than that of the ceramic material. A content of the dielectric material is in the range of 7.5 to 40% by volume, with respect to a total volume of the ceramic material and the dielectric material.Type: GrantFiled: December 12, 2014Date of Patent: October 17, 2017Assignee: TDK CORPORATIONInventors: Takeshi Shibayama, Hidenobu Umeda
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Patent number: 9293913Abstract: An ESD suppressor is configured including first and second discharge electrodes arranged as separated from each other, and a discharge inducing portion kept in contact with the first and second discharge electrodes so as to connect mutually opposed portions of the first and second discharge electrodes to each other. The discharge inducing portion contains metal particles. The first and second discharge electrodes are located on the coil side with respect to the discharge inducing portion when viewed in a stack direction of a plurality of insulator layers. An element body has a cavity portion located so as to cover the whole of the discharge inducing portion when viewed in the stack direction from the coil side. The cavity portion is in contact with the mutually opposed portions of the first and second discharge electrodes and with the discharge inducing portion.Type: GrantFiled: July 24, 2014Date of Patent: March 22, 2016Assignee: TDK CORPORATIONInventors: Hidenobu Umeda, Yuma Ishikawa, Makoto Yoshino, Keigo Higashida
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Patent number: 9185785Abstract: An electrostatic protection component includes: a body in which a plurality of ceramic substrates is laminated; and a pair of discharge electrodes which are formed within the body and which are spaced to face each other. The discharge electrodes include main body portions extending along a longitudinal direction, and the main body portions include tips in the longitudinal direction and side edges extending along the longitudinal direction. The pair of discharge electrodes are arranged such that both the main body portions are adjacent to each other in a short direction. The discharge electrodes face each other in the short direction between the side edges, and discharge occurs only between the side edges, between the discharge electrodes.Type: GrantFiled: March 24, 2014Date of Patent: November 10, 2015Assignee: TDK CORPORATIONInventors: Hidenobu Umeda, Makoto Yoshino, Takahiro Sato, Takuo Hattori, Shinichi Sato, Takeshi Shibayama
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Publication number: 20150189727Abstract: An ESD (ElectroStatic Discharge) protection component has: first and second discharge electrodes arranged so as to be opposed to each other through a gap; and a discharge inducing portion kept in contact with the first and second discharge electrodes and configured to connect the first and second discharge electrodes to each other. The discharge inducing portion has metal particles, a ceramic material containing glass, and a dielectric material having a dielectric constant higher than that of the ceramic material. A content of the dielectric material is in the range of 7.5 to 40% by volume, with respect to a total volume of the ceramic material and the dielectric material.Type: ApplicationFiled: December 12, 2014Publication date: July 2, 2015Inventors: Takeshi SHIBAYAMA, Hidenobu UMEDA
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Publication number: 20150036248Abstract: An ESD suppressor is configured including first and second discharge electrodes arranged as separated from each other, and a discharge inducing portion kept in contact with the first and second discharge electrodes so as to connect mutually opposed portions of the first and second discharge electrodes to each other. The discharge inducing portion contains metal particles. The first and second discharge electrodes are located on the coil side with respect to the discharge inducing portion when viewed in a stack direction of a plurality of insulator layers. An element body has a cavity portion located so as to cover the whole of the discharge inducing portion when viewed in the stack direction from the coil side. The cavity portion is in contact with the mutually opposed portions of the first and second discharge electrodes and with the discharge inducing portion.Type: ApplicationFiled: July 24, 2014Publication date: February 5, 2015Inventors: Hidenobu UMEDA, Yuma ISHIKAWA, Makoto YOSHINO, Keigo HIGASHIDA
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Publication number: 20140204499Abstract: An electrostatic protection component includes: a body in which a plurality of ceramic substrates is laminated; and a pair of discharge electrodes which are formed within the body and which are spaced to face each other. The discharge electrodes include main body portions extending along a longitudinal direction, and the main body portions include tips in the longitudinal direction and side edges extending along the longitudinal direction. The pair of discharge electrodes are arranged such that both the main body portions are adjacent to each other in a short direction. The discharge electrodes face each other in the short direction between the side edges, and discharge occurs only between the side edges, between the discharge electrodes.Type: ApplicationFiled: March 24, 2014Publication date: July 24, 2014Applicant: TDK CorporationInventors: Hidenobu UMEDA, Makoto YOSHINO, Takahiro SATO, Takuo HATTORI, Shinichi SATO, Takeshi SHIBAYAMA
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Patent number: 8724284Abstract: An electrostatic protection component includes: a body in which a plurality of ceramic substrates is laminated; and a pair of discharge electrodes which are formed within the body and which are spaced to face each other. The discharge electrodes include main body portions extending along a longitudinal direction, and the main body portions include tips in the longitudinal direction and side edges extending along the longitudinal direction. The pair of discharge electrodes are arranged such that both the main body portions are adjacent to each other in a short direction. The discharge electrodes face each other in the short direction between the side edges, and discharge occurs only between the side edges, between the discharge electrodes.Type: GrantFiled: May 18, 2012Date of Patent: May 13, 2014Assignee: TDK CorporationInventors: Hidenobu Umeda, Makoto Yoshino, Takahiro Sato, Takuo Hattori, Shinichi Sato, Takeshi Shibayama
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Publication number: 20120300355Abstract: An electrostatic protection component includes: a body in which a plurality of ceramic substrates is laminated; and a pair of discharge electrodes which are formed within the body and which are spaced to face each other. The discharge electrodes include main body portions extending along a longitudinal direction, and the main body portions include tips in the longitudinal direction and side edges extending along the longitudinal direction. The pair of discharge electrodes are arranged such that both the main body portions are adjacent to each other in a short direction. The discharge electrodes face each other in the short direction between the side edges, and discharge occurs only between the side edges, between the discharge electrodes.Type: ApplicationFiled: May 18, 2012Publication date: November 29, 2012Applicant: TDK CorporationInventors: Hidenobu Umeda, Makoto YOSHINO, Takahiro SATO, Takuo HATTORI, Shinichi SATO, Takeshi SHIBAYAMA
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Patent number: 7481947Abstract: A ferrite magnetic material comprising a main phase of W-type is provided which has magnetic properties improved through the optimization of additives. The ferrite magnetic material comprises a main constituent having a compound represented by composition formula AFe2+aFe3+bO27 (wherein A comprises at least one element selected from Sr, Ba and Pb; 1.5?a?2.1; and 12.9?b?16.3), a first additive containing a Ca constituent (0.3 to 3.0 wt % in terms of CaCO3) and/or a Si constituent (0.2 to 1.4 wt % in terms of SiO2), and a second additive containing at least one of an Al constituent (0.01 to 1.5 wt % in terms of Al2O3), a W constituent (0.01 to 0.6 wt % in terms of WO3), a Ce constituent (0.001 to 0.6 wt % in terms of CeO2), a Mo constituent (0.001 to 0.16 wt % in terms of MoO3), and a Ga constituent (0.001 to 15 wt % in terms of Ga2O3).Type: GrantFiled: December 8, 2004Date of Patent: January 27, 2009Assignee: TDK CorporationInventors: Yoshihiko Minachi, Junichi Nagaoka, Shunsuke Kurasawa, Noboru Ito, Taku Murase, Takeshi Masuda, Kenya Takagawa, Hidenobu Umeda
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Publication number: 20080292538Abstract: There is provided a process for producing W-type ferrite having high magnetic properties by reducing compacting defects during wet compacting. Specifically, there is a provided a process for producing a ferrite sintered body having a main composition of the following formula (1): AFe2+aFe3+bO27 . . . (1) wherein 1.5?a?2.1, 14?a+b?18.Type: ApplicationFiled: January 18, 2005Publication date: November 27, 2008Applicant: TDK CORPORATIONInventors: Yoshihiko Minachi, Junichi Nagaoka, Taku Murase, Noburo Ito, Shunsuke Kurasawa, Hidenobu Umeda
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Publication number: 20070099033Abstract: A ferrite magnetic material comprising a main phase of W-type is provided which has magnetic properties improved through the optimization of additives. The ferrite magnetic material comprises a main constituent having a compound represented by composition formula AFe2+aFe3+bO27 (wherein A comprises at least one element selected from Sr, Ba and Pb; 1.5?a?2.1; and 12.9?b?16.3), a first additive containing a Ca constituent (0.3 to 3.0 wt % in terms of CaCO3) and/or a Si constituent (0.2 to 1.4 wt % in terms of SiO2), and a second additive containing at least one of an Al constituent (0.01 to 1.5 wt % in terms of Al2O3), a W constituent (0.01 to 0.6 wt % in terms of WO3), a Ce constituent (0.001 to 0.6 wt % in terms of CeO2), a Mo constituent (0.001 to 0.16 wt % in terms of MoO3), and a Ga constituent (0.001 to 15 wt % in terms of Ga2O3).Type: ApplicationFiled: December 8, 2004Publication date: May 3, 2007Inventors: Yoshihiko Minachi, Junichi Nagaoka, Shunsuke Kurasawa, Noboru Ito, Taku Murase, Takeshi Masuda, Kenya Takagawa, Hidenobu Umeda
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Publication number: 20070071986Abstract: In the nonmagnetic Zn-ferrite of the present invention comprising iron oxide and zinc oxide, the content of Fe2+ is specifically limited. Alternately in the nonmagnetic Zr-ferrite comprising iron oxide and zinc oxide as main components, a given amount of at lease one metal oxide selected from the group consisting of manganese oxide, nickel oxide and magnesium oxide is contained. It is thus possible to provide a nonmagnetic Zn-ferrite that can have high resistivity without containing Cu.Type: ApplicationFiled: September 27, 2006Publication date: March 29, 2007Applicant: TDK CorporationInventors: Hidenobu Umeda, Yukio Takahashi
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Publication number: 20070009767Abstract: The present invention provides a ferrite magnetic material comprising as a main constituent a compound represented by a composition formula, AFe2+aFe3+bO27 (wherein 1.1?a?2.4, 12.3?b?16.1; and A comprises at least one element selected from Sr, Ba and Pb), and also comprising as additives a Ca constituent in terms of CaCO3 and a Si constituent in terms of SiO2 so as to satisfy the relation CaCO3/SiO2=0.5 to 1.38 (molar ratio). By making the relation CaCO3/SiO2=0.5 to 1.38 (molar ratio) be satisfied, the coercive force (HcJ) and the residual magnetic flux density (Br) can be made to simultaneously attain high levels.Type: ApplicationFiled: July 20, 2004Publication date: January 11, 2007Inventors: Yoshihiko Minachi, Junichi Nagaoka, Noboru Ito, Shunsuke Kurasawa, Taku Murase, Kenya Takagawa, Hidenobu Umeda