Patents by Inventor Yuusuke Nagai
Yuusuke Nagai 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: 10818422Abstract: In a multilayer coil component, an end of a lower coil layer and an end of a connecting part are directly overlapped, and the end of the lower coil layer includes a contact edge positioned on a side of the connecting part and being in contact with the connecting part and a non-contact edge positioned on a side opposite to the connecting part and not being in contact with the connecting part. Then, the contact edge and the non-contact edge are not overlapped when viewed from a laminated direction. Consequently, a propagation distance of a crack becomes longer as compared with the case where an end face is parallel to the laminated direction, effectively suppressing advance of the crack. Suppressed advance of a crack in this manner makes the multilayer coil component provide a high component strength as a whole.Type: GrantFiled: February 13, 2018Date of Patent: October 27, 2020Assignee: TDK CORPORATIONInventors: Yuusuke Nagai, Takashi Suzuki, Kouichi Kakuda, Kunihiko Kawasaki, Shinichi Kondo, Yuya Ishima, Shinichi Sato, Masaki Takahashi, Takashi Endo
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Patent number: 10607756Abstract: A soft magnetic metal powder includes a plurality of soft magnetic metal grains composed of an Fe—Si based alloy. A content of P in the Fe—Si based alloy is 110 to 650 ppm provided that a total content of Fe and Si is 100 mass %. A soft magnetic metal fired body includes soft magnetic metal fired grains composed of an Fe—Si based alloy. A content of P in the Fe—Si based alloy is 110 to 650 ppm provided that a total content of Fe and Si is 100 mass %.Type: GrantFiled: June 9, 2017Date of Patent: March 31, 2020Assignee: TDK CORPORATIONInventors: Takashi Suzuki, Hidekazu Sato, Yuusuke Nagai, Kouichi Kakuda, Kunihiko Kawasaki, Shinichi Kondo, Yuya Ishima, Shinichi Sato, Masaki Takahashi, Takashi Endo
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Patent number: 10388448Abstract: A multilayer coil component includes an element body including soft magnetic metal powders and a coil disposed in the element body. The coil includes a plurality of internal conductors electrically connected to each other. The plurality of internal conductors are separated from each other in a first direction and are adjacent to each other in the first direction. An average particle diameter of the soft magnetic metal powders located at an inner side of the coil when viewing from the first direction is larger than an average particle diameter of the soft magnetic metal powders located between the internal conductors adjacent to each other in the first direction.Type: GrantFiled: June 8, 2017Date of Patent: August 20, 2019Assignee: TDK CORPORATIONInventors: Yuusuke Nagai, Takashi Suzuki, Kouichi Kakuda, Kunihiko Kawasaki, Shinichi Kondo, Yuya Ishima, Shinichi Sato, Masaki Takahashi, Takashi Endo
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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: 20180233262Abstract: In a multilayer coil component, an end of a lower coil layer and an end of a connecting part are directly overlapped, and the end of the lower coil layer includes a contact edge positioned on a side of the connecting part and being in contact with the connecting part and a non-contact edge positioned on a side opposite to the connecting part and not being in contact with the connecting part. Then, the contact edge and the non-contact edge are not overlapped when viewed from a laminated direction. Consequently, a propagation distance of a crack becomes longer as compared with the case where an end face is parallel to the laminated direction, effectively suppressing advance of the crack. Suppressed advance of a crack in this manner makes the multilayer coil component provide a high component strength as a whole.Type: ApplicationFiled: February 13, 2018Publication date: August 16, 2018Applicant: TDK CORPORATIONInventors: Yuusuke NAGAI, Takashi SUZUKI, Kouichi KAKUDA, Kunihiko KAWASAKI, Shinichi KONDO, Yuya ISHIMA, Shinichi SATO, Masaki TAKAHASHI, Takashi ENDO
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Patent number: 9959969Abstract: Each of internal conductors includes an annular portion with two end portions and an extension portion extending along the one end portion from the other end portion and separated from the one end portion. An edge of the one end portion and an edge of the other end portion oppose each other. The internal conductors include two first internal conductors and a second internal conductor located between the first internal conductors in a first direction. The one end portion of at least one first internal conductor includes a first portion overlapping the edges of the two end portions of the second internal conductor and a second portion overlapping a region between the edges of the two end portions of the second internal conductor, when viewed from the first direction. The second portion is recessed at a side opposite to the region, as compared with the first portion.Type: GrantFiled: September 26, 2016Date of Patent: May 1, 2018Assignee: TDK CORPORATIONInventors: Yuusuke Nagai, Kunihiko Kawasaki
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Patent number: 9947455Abstract: A coil includes a plurality of internal conductors that are electrically connected to each other and are disposed in an element body having magnetism. The plurality of internal conductors includes conductor portions that are separated from each other in a first direction and overlap each other when viewed from the first direction. At least one low-permeability layer is disposed along the conductor portions between the internal conductors adjacent to each other in the first direction. Permeability of the low-permeability layer is lower than permeability of the element body. The low-permeability layer includes a first portion contacting the internal conductors and at least one second portion separated from the internal conductors in the first direction, between the internal conductors adjacent to each other. The element body includes first element body regions that are interposed between the second portion and the internal conductors.Type: GrantFiled: September 26, 2016Date of Patent: April 17, 2018Assignee: TDK CORPORATIONInventors: Yuusuke Nagai, Kunihiko Kawasaki, Yoshimitsu Satoh
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Publication number: 20170372829Abstract: A multilayer coil component includes an element body including soft magnetic metal powders and a coil disposed in the element body. The coil includes a plurality of internal conductors electrically connected to each other. The plurality of internal conductors are separated from each other in a first direction and are adjacent to each other in the first direction. An average particle diameter of the soft magnetic metal powders located at an inner side of the coil when viewing from the first direction is larger than an average particle diameter of the soft magnetic metal powders located between the internal conductors adjacent to each other in the first direction.Type: ApplicationFiled: June 8, 2017Publication date: December 28, 2017Applicant: TDK CORPORATIONInventors: Yuusuke NAGAI, Takashi SUZUKI, Kouichi KAKUDA, Kunihiko KAWASAKI, Shinichi KONDO, Yuya ISHIMA, Shinichi SATO, Masaki TAKAHASHI, Takashi ENDO
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Publication number: 20170365385Abstract: A soft magnetic metal powder includes a plurality of soft magnetic metal grains composed of an Fe—Si based alloy. A content of P in the Fe—Si based alloy is 110 to 650 ppm provided that a total content of Fe and Si is 100 mass %. A soft magnetic metal fired body includes soft magnetic metal fired grains composed of an Fe—Si based alloy. A content of P in the Fe—Si based alloy is 110 to 650 ppm provided that a total content of Fe and Si is 100 mass %.Type: ApplicationFiled: June 9, 2017Publication date: December 21, 2017Applicant: TDK CORPORATIONInventors: Takashi SUZUKI, Hidekazu SATO, Yuusuke NAGAI, Kouichi KAKUDA, Kunihiko KAWASAKI, Shinichi KONDO, Yuya ISHIMA, Shinichi SATO, Masaki TAKAHASHI, Takashi ENDO
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Publication number: 20170103845Abstract: Each of internal conductors includes an annular portion with two end portions and an extension portion extending along the one end portion from the other end portion and separated from the one end portion. An edge of the one end portion and an edge of the other end portion oppose each other. The internal conductors include two first internal conductors and a second internal conductor located between the first internal conductors in a first direction. The one end portion of at least one first internal conductor includes a first portion overlapping the edges of the two end portions of the second internal conductor and a second portion overlapping a region between the edges of the two end portions of the second internal conductor, when viewed from the first direction. The second portion is recessed at a side opposite to the region, as compared with the first portion.Type: ApplicationFiled: September 26, 2016Publication date: April 13, 2017Applicant: TDK CORPORATIONInventors: Yuusuke NAGAI, Kunihiko KAWASAKI
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Publication number: 20170103842Abstract: A coil includes a plurality of internal conductors that are electrically connected to each other and are disposed in an element body having magnetism. The plurality of internal conductors includes conductor portions that are separated from each other in a first direction and overlap each other when viewed from the first direction. At least one low-permeability layer is disposed along the conductor portions between the internal conductors adjacent to each other in the first direction. Permeability of the low-permeability layer is lower than permeability of the element body. The low-permeability layer includes a first portion contacting the internal conductors and at least one second portion separated from the internal conductors in the first direction, between the internal conductors adjacent to each other. The element body includes first element body regions that are interposed between the second portion and the internal conductors.Type: ApplicationFiled: September 26, 2016Publication date: April 13, 2017Applicant: TDK CORPORATIONInventors: Yuusuke NAGAI, Kunihiko KAWASAKI, Yoshimitsu SATOH
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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
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Patent number: D622737Type: GrantFiled: June 15, 2009Date of Patent: August 31, 2010Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Yuusuke Nagai, Hitoshi Nishimura, Hideki Fujimoto