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公开(公告)号:US20200234873A1
公开(公告)日:2020-07-23
申请号:US16746178
申请日:2020-01-17
Applicant: TDK Corporation
Inventor: Hajime KATO , Hidekazu SATO , Makoto YOSHINO , Kazuya TOBITA , Yuto SHIGA , Youichi KAZUTA , Noriaki HAMACHI
Abstract: A multilayer coil component 1 includes an element body 2, a coil 8, and a terminal electrode 4 and a terminal electrode 5. Each of the terminal electrode 4 and the terminal electrode 5 is disposed over at least the end surfaces 2a and 2b and a main surface 2d. Each of the terminal electrode 4 and the terminal electrode 5 and at least a part of the coil 8 overlap when viewed from the facing direction of the pair of side surfaces 2e and 2f. Each of the terminal electrode 4 and the terminal electrode 5 and the coil 8 do not overlap when viewed from the facing direction of the pair of end surfaces 2a and 2b.
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公开(公告)号:US20170330673A1
公开(公告)日:2017-11-16
申请号:US15497314
申请日:2017-04-26
Applicant: TDK CORPORATION
Inventor: Shinichi SATO , Yohei TADAKI , Akihiko OIDE , Yuma ISHIKAWA , Hidekazu SATO
IPC: H01F27/245 , H01F41/04 , H01F27/32 , H01F27/29 , H01F27/28 , H01F41/12 , H01F27/255
CPC classification number: H01F27/245 , H01F17/0013 , H01F17/04 , H01F27/022 , H01F27/255 , H01F27/2804 , H01F27/29 , H01F27/292 , H01F27/323 , H01F41/043 , H01F41/122
Abstract: A multilayer coil component includes an element body made of a ferrite sintered body and a coil. The coil is configured with a plurality of internal conductors juxtaposed in the element body and electrically connected to one another. An average crystal grain size in a surface region of the element body is smaller than an average crystal grain size in a region between the internal conductors in the element body. A surface of the element body is covered with a layer made of an insulating material. The insulating material is not present among the crystal grains in the surface region of the element body.
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公开(公告)号:US20170309389A1
公开(公告)日:2017-10-26
申请号:US15488876
申请日:2017-04-17
Applicant: TDK CORPORATION
Inventor: Shinichi SATO , Yohei TADAKI , Akihiko OIDE , Yuma ISHIKAWA , Hidekazu SATO , Kazuhiro EBINA , Hiroyuki TANOUE
Abstract: An electronic component includes: an element body in which a plurality of insulator layers are stacked; a coil in which a plurality of inner conductors installed in the element body are electrically connected to each other; and an outer electrode that is disposed on an outer surface of the element body, is electrically connected to the coil, and includes at least a baked electrode layer. The inner conductor connected to the outer electrode includes a connection conductor that electrically connects the baked electrode layer to the inner conductor. The connection conductor includes a protruding portion that protrudes from the outer surface of the element body to the outer electrode. The protruding portion includes a metal having a smaller diffusion coefficient than a metal of a main component included in the baked electrode layer. The inner conductors have a lower electric resistance value than the metal included in the protruding portion.
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公开(公告)号:US20220068565A1
公开(公告)日:2022-03-03
申请号:US17521500
申请日:2021-11-08
Applicant: TDK CORPORATION
Inventor: Yoji TOZAWA , Masashi SHIMOYASU , Makoto YOSHINO , Takuo ABE , Akihiko OIDE , Tsutomu ONO , Shinichi SATO , Makoto MORITA , Shinichi SATO , Hidekazu SATO
IPC: H01G4/232 , H01G4/252 , H01G13/00 , H05K1/03 , H01B1/22 , H01G4/30 , H03H7/42 , H01F17/00 , H01F27/29 , H01F27/32
Abstract: An electronic component includes an element body, an external electrode, and a resin film having electrical insulation properties. The element body includes a principal surface and a side surface adjacent to the principal surface. The external electrode includes a first electrode portion disposed on the principal surface and a second electrode portion disposed on the side surface. The resin film is disposed on the principal surface and is in contact with the principal surface. Each of the first electrode portion and the second electrode portion includes a conductive resin layer disposed on the element body. A conductive resin layer included in the first electrode portion is disposed on the resin film and is in contact with the resin film.
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公开(公告)号:US20190096561A1
公开(公告)日:2019-03-28
申请号:US16136944
申请日:2018-09-20
Applicant: TDK CORPORATION
Inventor: Yusuke NAGAI , Takashi SUZUKI , Hidekazu SATO , Takashi ENDO , Kouichi KAKUDA , Kunihiko KAWASAKI , Shinichi KONDO , Yuya ISHIMA , Shinichi SATO , Masaki TAKAHASHI
Abstract: In a stepwise structure formed in a multilayer coil component, a difference occurs in a shrinkage amount between a maximum film thickness portion in which the number of layers is large and a minimum film thickness portion in which the number of layers is small due to portions different in the number of layers of coil parts (that is, upper coil part, lower coil part, and connecting part) adjacent to each other like the maximum film thickness portion and the minimum film thickness portion, readily causing a crack by an inner stress due to the difference in the shrinkage amount. In a multilayer coil component according to the present disclosure, a stress relaxation part overlapping with a maximum film thickness portion whose shrinkage amount is large is provided to relax inner stress in a stepwise structure, resulting in prevention of a crack.
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公开(公告)号:US20180337001A1
公开(公告)日:2018-11-22
申请号:US15821998
申请日:2017-11-24
Applicant: TDK CORPORATION
Inventor: Yoji TOZAWA , Masashi SHIMOYASU , Makoto YOSHINO , Takuo ABE , Akihiko OIDE , Tsutomu ONO , Shinichi SATO , Makoto MORITA , Shinichi SATO , Hidekazu SATO , Masashi KITAZAKI , Naoki UCHIDA , Masahiro KATO
CPC classification number: H01G4/2325 , H01B1/22 , H01F17/0013 , H01F2017/0093 , H01G4/12 , H01G4/252 , H01G4/30 , H01G13/006 , H03H7/427 , H03H2001/0085 , H05K1/0306
Abstract: An electronic component includes an element body, an external electrode, and a resin film having electrical insulation properties. The element body includes a principal surface and a side surface adjacent to the principal surface. The external electrode includes a first electrode portion disposed on the principal surface and a second electrode portion disposed on the side surface. The resin film is disposed on the principal surface and is in contact with the principal surface. Each of the first electrode portion and the second electrode portion includes a conductive resin layer disposed on the element body. A conductive resin layer included in the first electrode portion is disposed on the resin film and is in contact with the resin film.
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公开(公告)号:US20230005656A1
公开(公告)日:2023-01-05
申请号:US17945396
申请日:2022-09-15
Applicant: TDK CORPORATION
Inventor: Shinichi SATO , Yohei TADAKI , Akihiko OIDE , Yuma ISHIKAWA , Hidekazu SATO , Kazuhiro EBINA , Hiroyuki TANOUE
Abstract: An electronic component includes: an element body in which a plurality of insulator layers are stacked; a coil in which a plurality of inner conductors installed in the element body are electrically connected to each other; and an outer electrode that is disposed on an outer surface of the element body, is electrically connected to the coil, and includes at least a baked electrode layer. The inner conductor connected to the outer electrode includes a connection conductor that electrically connects the baked electrode layer to the inner conductor. The connection conductor includes a protruding portion that protrudes from the outer surface of the element body to the outer electrode. The protruding portion includes a metal having a smaller diffusion coefficient than a metal of a main component included in the baked electrode layer. The inner conductors have a lower electric resistance value than the metal included in the protruding portion.
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公开(公告)号:US20220277879A1
公开(公告)日:2022-09-01
申请号:US17666170
申请日:2022-02-07
Applicant: TDK CORPORATION
Inventor: Yusuke NAGAI , Hidekazu SATO , Kazuhiro EBINA , Kunihiko KAWASAKI , Takahiro SATO , Kouichi KAKUDA , Yuya ISHIMA , Shinichi KONDO , Shinichi SATO , Masaki TAKAHASHI
Abstract: In a multilayer coil component, first and second conductor patterns respectively have parallel parts that overlap in a lamination direction and non-parallel parts that do not overlap. The parallel parts of the first and second conductor patterns of one set are interconnected by a first through hole. The non-parallel parts of the first and second conductor patterns of sets adjacent to each other in the lamination direction are interconnected by a second through hole.
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公开(公告)号:US20200234874A1
公开(公告)日:2020-07-23
申请号:US16746276
申请日:2020-01-17
Applicant: TDK CORPORATION
Inventor: Hajime KATO , Hidekazu SATO , Makoto YOSHINO , Kazuya TOBITA , Yuto SHIGA , Youichi KAZUTA , Noriaki HAMACHI
Abstract: A multilayer coil component 1 includes four terminal electrodes 3, 4, 5, and 6. A part of the coil 8 as viewed from the facing direction of a pair of main surfaces 2c and 2d is disposed in at least one of first and second regions A1 and A2 formed between the pair of terminal electrodes 3 and 4 and the pair of terminal electrodes 5 and 6 disposed so as to face each other in the facing direction of the pair of side surfaces 2e and 2f and third and fourth regions formed between the pair of terminal electrodes 3 and 5 and the pair of terminal electrodes 4 and 6 disposed so as to face each other in the facing direction of the pair of end surfaces 2a and 2b.
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10.
公开(公告)号:US20170365385A1
公开(公告)日:2017-12-21
申请号:US15618493
申请日:2017-06-09
Applicant: TDK CORPORATION
Inventor: Takashi SUZUKI , Hidekazu SATO , Yuusuke NAGAI , Kouichi KAKUDA , Kunihiko KAWASAKI , Shinichi KONDO , Yuya ISHIMA , Shinichi SATO , Masaki TAKAHASHI , Takashi ENDO
IPC: H01F1/147 , H01F27/255 , H01F27/28
CPC classification number: H01F1/14766 , H01F17/0013 , H01F17/04 , H01F27/255 , H01F27/2804 , H01F2017/048 , H01F2027/2809
Abstract: 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 %.
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