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    Multilayer coil component
    1.
    发明授权
    Multilayer coil component 有权

    公开(公告)号：US11482365B2

    公开(公告)日：2022-10-25

    申请号：US16854303

    申请日：2020-04-21

    Applicant: TDK CORPORATION

    Inventor： Yuto Shiga ,  Yoji Tozawa ,  Masaki Takahashi ,  Takashi Endo ,  Hajime Kato

    IPC: H01F17/00 ,  H01F27/29

    Abstract: A multilayer coil component 1 includes an element body 2 having a plurality of stacked insulator layers 6 and having an outer surface provided with recessed portions 7 and 8, a coil 9 disposed in the element body 2, and terminal electrodes 4 and 5 connected to the coil 9 and disposed in the recessed portions 7 and 8. The recessed portions 7 and 8 are defined by a bottom surface and a side surface extending in a depth direction of the recessed portions 7 and 8 over the outer surface and the bottom surface, the terminal electrodes 4 and 5 have a first surface facing the bottom surface and a second surface facing the side surface, and a connection region A where a compound of elements constituting the element body 2 and a metal component are mixed is exposed to the second surface.

    Multilayer coil component
    4.
    发明授权
    Multilayer coil component 有权

    公开(公告)号：US11211188B2

    公开(公告)日：2021-12-28

    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

    IPC: H01F17/00 ,  H01F17/04 ,  H01F27/34 ,  H01F41/04 ,  H01F27/29

    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.

    Electronic component
    5.
    发明授权
    Electronic component 有权

    公开(公告)号：US11631521B2

    公开(公告)日：2023-04-18

    申请号：US16396913

    申请日：2019-04-29

    Applicant: TDK CORPORATION

    Inventor： Yoji Tozawa ,  Takuo Abe ,  Yuma Ishikawa ,  Hidekazu Sato ,  Takashi Endo ,  Masashi Shimoyasu ,  Kazuma Takahashi

    IPC: H01F27/28 ,  H03H1/00 ,  H03H7/09 ,  H01F41/04 ,  H01F27/29

    Abstract: An electronic component includes an element body and an external electrode disposed on the element body. The external electrode includes an underlying metal layer, a conductive resin layer, and a plating layer. The underlying metal layer is disposed on the element body. The conductive resin layer contains a plurality of conductive fillers and is disposed on the underlying metal layer. The plating layer is disposed on the conductive resin layer. A part of the plurality of conductive fillers is sintered with the underlying metal layer and is coupled to the underlying metal layer. Another part of the plurality of conductive fillers is exposed to a surface of the conductive resin layer and is in contact with the plating layer.

    Multilayer coil component
    6.
    发明授权
    Multilayer coil component 有权

    公开(公告)号：US10984939B2

    公开(公告)日：2021-04-20

    申请号：US15419522

    申请日：2017-01-30

    Applicant: TDK CORPORATION

    Inventor： Takashi Endo ,  Kenji Komorita ,  Kunihiko Kawasaki ,  Hidekazu Sato ,  Takashi Suzuki

    IPC: H01F5/00 ,  H01F17/00

    Abstract: 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.

    Lamination type LC filter array
    7.
    发明授权
    Lamination type LC filter array 有权

    公开(公告)号：US10784834B2

    公开(公告)日：2020-09-22

    申请号：US16334991

    申请日：2017-08-21

    Applicant: TDK CORPORATION

    Inventor： Akihiko Oide ,  Naoki Uchida ,  Yoji Tozawa ,  Makoto Yoshino ,  Seiichi Nakagawa ,  Shinichi Sato ,  Hiroshi Ono ,  Takashi Endo

    IPC: H03H7/01 ,  H03H1/00 ,  H03H7/075 ,  H01F17/00 ,  H01F27/00

    Abstract: A multilayer LC filter array includes an element body of a rectangular parallelepiped shape, a first filter including a first inductor and a first capacitor, a second filter including a second inductor and a second capacitor, a first input terminal electrode and a first output terminal electrode that are connected to the first inductor, a second input terminal electrode and a second output terminal electrode that are connected to the second inductor, and a ground terminal electrode that is connected to the first capacitor and the second capacitor. The element body includes a principal surface. The ground terminal electrode is disposed at a center of the principal surface. The first input terminal electrode, the first output terminal electrode, the second input terminal electrode, and the second output terminal electrode are disposed at respective different corner portions of the element body when viewed from a direction orthogonal to the principal surface.

    Multilayer coil component
    10.
    发明授权
    Multilayer coil component 有权

    公开(公告)号：US10818422B2

    公开(公告)日：2020-10-27

    申请号：US15895567

    申请日：2018-02-13

    Applicant: TDK CORPORATION

    Inventor： Yuusuke Nagai ,  Takashi Suzuki ,  Kouichi Kakuda ,  Kunihiko Kawasaki ,  Shinichi Kondo ,  Yuya Ishima ,  Shinichi Sato ,  Masaki Takahashi ,  Takashi Endo

    IPC: H01F27/30 ,  H01F17/00 ,  H01F27/29

    Abstract: 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.

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