Patents by Inventor Kenji KOMORITA
Kenji KOMORITA 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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Publication number: 20230420172Abstract: A multilayer coil component includes an element body having a multilayer structure including a first element body portion formed of a ferrite element body material, and a second element body portion laminated on the first element body portion and formed of a ferrite element body material having a composition different from the ferrite element body material forming the first element body portion, a multilayer coil having an axis parallel to a lamination direction of the element body, and a stress alleviation portion provided in an inner region of the multilayer coil when viewed from the lamination direction. In the multilayer coil component, the stress alleviation portion is provided in the inner region of the multilayer coil in which a stress tends to be concentrated to alleviate the stress in the inner region of the multilayer coil, and thereby occurrence of cracking in the element body can be suppressed.Type: ApplicationFiled: September 13, 2023Publication date: December 28, 2023Applicant: TDK CORPORATIONInventors: Hidekazu SATO, Takahiro SATO, Hitoshi KUDO, Takashi ENDO, Yusuke NAGAI, Tatsuro SUZUKI, Hiroko KORIKAWA, Kenji KOMORITA
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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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Patent number: 11810704Abstract: A multilayer coil component includes an element body having a multilayer structure including a first element body portion formed of a ferrite element body material, and a second element body portion laminated on the first element body portion and formed of a ferrite element body material having a composition different from the ferrite element body material forming the first element body portion, a multilayer coil having an axis parallel to a lamination direction of the element body, and a stress alleviation portion provided in an inner region of the multilayer coil when viewed from the lamination direction. In the multilayer coil component, the stress alleviation portion is provided in the inner region of the multilayer coil in which a stress tends to be concentrated to alleviate the stress in the inner region of the multilayer coil, and thereby occurrence of cracking in the element body can be suppressed.Type: GrantFiled: October 29, 2019Date of Patent: November 7, 2023Assignee: TDK CORPORATIONInventors: Hidekazu Sato, Takahiro Sato, Hitoshi Kudo, Takashi Endo, Yusuke Nagai, Tatsuro Suzuki, Hiroko Korikawa, Kenji Komorita
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Publication number: 20230170117Abstract: In a multilayer coil component, a plurality of coil conductors are stacked in a coil axis direction. A connecting conductor connects the coil conductors adjacent to each other in the coil axis direction. First, second, and third coil conductors are arranged in order in the coil axis direction. A main body portion extends in a circumferential direction of the coil axis. Pad portions are connected to the main body portion, are connected to the first coil conductor via the connecting conductor, overhang from the third coil conductor in a direction away from the coil axis when viewed from the coil axis direction, and are inclined with respect to a virtual plane orthogonal to the coil axis direction.Type: ApplicationFiled: November 22, 2022Publication date: June 1, 2023Applicant: TDK CORPORATIONInventors: Yuya OSHIMA, Kenji KOMORITA, Takehiro ISHII, Kouichi KAKUDA, Shigeshi OSAWA, Yusaku ABE, Tsubasa OZAWA, Midori KISHIMOTO, Makoto YOSHINO, Koki ITO, Masato KUDOU
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Publication number: 20220310316Abstract: In the multi-layer coil component, the hole portion is provided in the vicinity of the side surface of the element body, and the distance from the tip position of the external electrode to the hole portion is shorter than the distance from the tip position of the external electrode to the coil. Therefore, when a crack is generated starting from the tip position of the external electrode on the mounting surface, the crack progress toward the hole portion located at a distance closer than the coil. Therefore, in the multi-layer coil component, splitting of the coil due to the crack can be prevented.Type: ApplicationFiled: March 28, 2022Publication date: September 29, 2022Applicant: TDK CORPORATIONInventors: Yuya OSHIMA, Kenji KOMORITA, Masayuki SUZUKI, Yuudai KATOU, Takeru SASAKI, Shigeshi OSAWA, Takehiro ISHII, Kouichi KAKUDA, Yukio TAKAHASHI, Tsubasa OZAWA, Makoto YOSHINO
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Patent number: 11282622Abstract: A ferrite composition includes a main component and a sub-component. The main component includes 10.0 to 38.0 mol % of a Fe compound in terms of Fe2O3, 3.0 to 11.0 mol % of a Cu compound in terms of CuO, 39.0 to 80.0 mol % (excluding 39.0 mol %) of a Zn compound in terms of ZnO, and a balance of a Ni compound. The sub-component includes 10.0 to 23.0 parts by weight of a Si compound in terms of SiO2, 0 to 3.0 parts by weight (including 0 parts by weight) of a Co compound in terms of Co3O4, and 0.1 to 3.0 parts by weight of a Bi compound in terms of Bi2O3 with respect to 100 parts by weight of the main component.Type: GrantFiled: December 26, 2019Date of Patent: March 22, 2022Assignee: TDK CORPORATIONInventors: Takeshi Shibayama, Takashi Suzuki, Takahiro Sato, Kenji Komorita, Tatsuro Suzuki, Yukio Takahashi, Hiroyuki Tanoue, Yasuhiro Ito
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Patent number: 10984939Abstract: A multilayer coil component includes an element body, a coil including a plurality of internal conductors, and a plurality of stress-relaxation spaces. The plurality of internal conductors are separated from each other in a first direction in the element body. Each stress-relaxation space is in contact with a surface of the corresponding internal conductor and powders exist in each stress-relaxation space. The element body includes element body regions located between the internal conductors adjacent to each other in the first direction. Each stress-relaxation space includes a first boundary surface with each internal conductor and a second boundary surface with each element body region. The first boundary surface and the second boundary surface oppose each other in the first direction. A distance between the first boundary surface and the second boundary surface is smaller than a thickness of each element body region in the first direction.Type: GrantFiled: January 30, 2017Date of Patent: April 20, 2021Assignee: TDK CORPORATIONInventors: Takashi Endo, Kenji Komorita, Kunihiko Kawasaki, Hidekazu Sato, Takashi Suzuki
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Publication number: 20200243239Abstract: A ferrite composition includes a main component and a sub-component. The main component includes 10.0 to 38.0 mol % of a Fe compound in terms of Fe2O3, 3.0 to 11.0 mol % of a Cu compound in terms of CuO, 39.0 to 80.0 mol % (excluding 39.0 mol %) of a Zn compound in terms of ZnO, and a balance of a Ni compound. The sub-component includes 10.0 to 23.0 parts by weight of a Si compound in terms of SiO2, 0 to 3.0 parts by weight (including 0 parts by weight) of a Co compound in terms of Co3O4, and 0.1 to 3.0 parts by weight of a Bi compound in terms of Bi2O3 with respect to 100 parts by weight of the main component.Type: ApplicationFiled: December 26, 2019Publication date: July 30, 2020Applicant: TDK CORPORATIONInventors: Takeshi SHIBAYAMA, Takashi SUZUKI, Takahiro SATO, Kenji KOMORITA, Tatsuro SUZUKI, Yukio TAKAHASHI, Hiroyuki TANOUE, Yasuhiro ITO
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Publication number: 20200135375Abstract: A multilayer coil component includes an element body having a multilayer structure including a first element body portion formed of a ferrite element body material, and a second element body portion laminated on the first element body portion and formed of a ferrite element body material having a composition different from the ferrite element body material forming the first element body portion, a multilayer coil having an axis parallel to a lamination direction of the element body, and a stress alleviation portion provided in an inner region of the multilayer coil when viewed from the lamination direction. In the multilayer coil component, the stress alleviation portion is provided in the inner region of the multilayer coil in which a stress tends to be concentrated to alleviate the stress in the inner region of the multilayer coil, and thereby occurrence of cracking in the element body can be suppressed.Type: ApplicationFiled: October 29, 2019Publication date: April 30, 2020Applicant: TDK CORPORATIONInventors: Hidekazu SATO, Takahiro SATO, Hitoshi KUDO, Takashi ENDO, Yusuke NAGAI, Tatsuro SUZUKI, Hiroko KORIKAWA, Kenji KOMORITA
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Patent number: 10283247Abstract: In a multilayer coil component, even when both pairs of ends of a first coil part and a second coil part are located at the same positions when viewed from the laminated direction and have the same shapes, a connecting part is connected only to a second end of the first coil part on the upper side in the laminated direction, and is connected only to a first end of the second coil part on the lower side in the laminated direction. Thus, a coil wound around along the laminated direction is structured without misaligning the positions of respective connecting parts. Consequently, the entire shapes of the respective coil parts can be designed to be the exact same shape, which makes it possible to reduce the number of types of coil part, saving labor and time for preparing many types of conductor patterns like the conventional type.Type: GrantFiled: July 19, 2016Date of Patent: May 7, 2019Assignee: TDK CORPORATIONInventors: Yuusuke Nagai, Masazumi Arata, Kenji Komorita, Yoshimitsu Satoh
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Publication number: 20180218829Abstract: A multilayer coil component includes an element body, a coil including a plurality of internal conductors, and a plurality of stress-relaxation spaces. The plurality of internal conductors are separated from each other in a first direction in the element body. Each stress-relaxation space is in contact with a surface of the corresponding internal conductor and powders exist in each stress-relaxation space. The element body includes element body regions located between the internal conductors adjacent to each other in the first direction. Each stress-relaxation space includes a first boundary surface with each internal conductor and a second boundary surface with each element body region. The first boundary surface and the second boundary surface oppose each other in the first direction. A distance between the first boundary surface and the second boundary surface is smaller than a thickness of each element body region in the first direction.Type: ApplicationFiled: January 30, 2017Publication date: August 2, 2018Applicant: TDK CORPORATIONInventors: Takashi ENDO, Kenji KOMORITA, Kunihiko KAWASAKI, Hidekazu SATO, Takashi SUZUKI
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Publication number: 20170025219Abstract: In a multilayer coil component, even when both pairs of ends of a first coil part and a second coil part are located at the same positions when viewed from the laminated direction and have the same shapes, a connecting part is connected only to a second end of the first coil part on the upper side in the laminated direction, and is connected only to a first end of the second coil part on the lower side in the laminated direction. Thus, a coil wound around along the laminated direction is structured without misaligning the positions of respective connecting parts. Consequently, the entire shapes of the respective coil parts can be designed to be the exact same shape, which makes it possible to reduce the number of types of coil part, saving labor and time for preparing many types of conductor patterns like the conventional type.Type: ApplicationFiled: July 19, 2016Publication date: January 26, 2017Applicant: TDK CORPORATIONInventors: Yuusuke NAGAI, Masazumi ARATA, Kenji KOMORITA, Yoshimitsu SATOH