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    MEMS MICROPHONE MODULE
    2.
    发明申请
    MEMS MICROPHONE MODULE 有权

    公开(公告)号：US20210127214A1

    公开(公告)日：2021-04-29

    申请号：US17143401

    申请日：2021-01-07

    Applicant: TDK CORPORATION

    Inventor： Akifumi KAMIJIMA ,  Tohru INOUE

    IPC: H04R19/04

    Abstract: A MEMS microphone includes a substrate, and a first conversion portion and a second conversion portion provided on the substrate, the first conversion portion and the second conversion portion convert sound into an electrical signal, the first conversion portion includes a first through hole, a first membrane covering the first through hole, and a first back plate facing the first membrane via a first air gap, the second conversion portion includes a second through hole, a second membrane covering the second through hole, and a second back plate facing the second membrane via a second air gap, and a dimension of the second air gap is greater than a dimension of the first air gap in a thickness direction of the substrate.

    LITHIUM SECONDARY BATTERY
    4.
    发明申请
    LITHIUM SECONDARY BATTERY 审中-公开

    公开(公告)号：US20200295397A1

    公开(公告)日：2020-09-17

    申请号：US16810216

    申请日：2020-03-05

    Applicant: TDK CORPORATION

    Inventor： Satoru HIRAKAWA ,  Yasuhiro TAKAGI ,  Tohru INOUE

    IPC: H01M10/0525 ,  H01M2/16 ,  H01M4/134

    Abstract: Disclosed herein is a lithium secondary battery that includes an electrode assembly having a weight energy density of 250 Wh/Kg or more, and a heat exhaust layer provided on a surface of the electrode assembly. The electrode assembly has a structure in which a positive electrode and a negative electrode are alternately stacked through a separator. The positive electrode includes a positive electrode current collector and a positive electrode active material layer formed on a surface of the positive electrode current collector. The negative electrode including a negative electrode current collector and a negative electrode active material layer formed on a surface of the negative electrode current collector.

    MEMS MICROPHONE
    5.
    发明申请
    MEMS MICROPHONE 审中-公开

    公开(公告)号：US20200077202A1

    公开(公告)日：2020-03-05

    申请号：US16509761

    申请日：2019-07-12

    Applicant: TDK CORPORATION

    Inventor： Akifumi KAMIJIMA ,  Tohru INOUE

    IPC: H04R19/04

    Abstract: MEMS microphone includes a substrate, and a first conversion portion and a second conversion portion provided on the substrate, the first conversion portion and the second conversion portion convert sound into an electrical signal, the first conversion portion includes a first through hole, a first membrane covering the first through hole, and a first back plate facing the first membrane via a first air gap, the second conversion portion includes a second through hole, a second membrane covering the second through hole, and a second back plate facing the second membrane via a second air gap, and a dimension of the second air gap is greater than a dimension of the first air gap in a thickness direction of the substrate.

    NEGATIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY USING THE SAME
    6.
    发明申请
    NEGATIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY USING THE SAME 审中-公开

    公开(公告)号：US20200295348A1

    公开(公告)日：2020-09-17

    申请号：US16810392

    申请日：2020-03-05

    Applicant: TDK CORPORATION

    Inventor： Yuusuke YAMAGUCHI ,  Tohru INOUE ,  Yasuhiro TAKAGI

    IPC: H01M4/131 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0585 ,  H01M10/0525

    Abstract: Disclosed herein is a negative electrode for non-aqueous electrolyte secondary battery that includes a negative electrode current collector, and a negative electrode active material layer. An area change rate and a thickness change rate of the negative electrode active material layer associated with charging are 0.1% or more and 10% or more, respectively. A triangular region having an intersection between first and second straight lines, a first point existing on the first straight line and being away from the intersection in the first direction toward the first side by a first distance, and a second point exists on the second straight line and being away from the intersection in the second direction toward the second side by a second distance, as vertices are cut away such that the triangular region has neither the negative electrode current collector nor the negative electrode active material layer.

    COIL COMPONENT AND POWER SUPPLY CIRCUIT UNIT
    7.
    发明申请
    COIL COMPONENT AND POWER SUPPLY CIRCUIT UNIT 审中-公开

    公开(公告)号：US20170316867A1

    公开(公告)日：2017-11-02

    申请号：US15495258

    申请日：2017-04-24

    Applicant: TDK CORPORATION

    Inventor： Akifumi KAMIJIMA ,  Masamichi TANIGUCHI ,  Makoto ENDO ,  Tohru INOUE

    IPC: H01F27/28 ,  H02M3/156

    Abstract: Provided is a coil component including a coil portion that has two ring-shaped planar coil portions individually including a coil-wound portion and an insulative resin layer which covers the periphery of the coil-wound portion within the same layer as the coil-wound portion, an insulative resin layer being interposed between the planar coil portions adjacent to each other in the stacking direction of the planar coil portions, and a pair of insulative resin layers being respectively positioned on one end side and the other end side of the two planar coil portions in the stacking direction; and a covering portion that covers the coil portion. In regard to the stacking direction, the thickness of the insulative resin layer is thinner than the thickness of each of the pair of insulative resin layers.

    MEMS MICROPHONE
    8.
    发明申请
    MEMS MICROPHONE 审中-公开

    公开(公告)号：US20200077201A1

    公开(公告)日：2020-03-05

    申请号：US16509628

    申请日：2019-07-12

    Applicant: TDK CORPORATION

    Inventor： Akifumi KAMIJIMA ,  Tohru INOUE

    IPC: H04R19/04 ,  H04R3/04 ,  H04R3/00 ,  H04R25/00 ,  B81B7/00

    Abstract: A MEMS microphone includes a substrate, and a first conversion portion and a second conversion portion provided on the substrate, the first conversion portion and the second conversion portion convert sound into an electrical signal, the first conversion portion includes a first through hole, a first membrane covering the first through hole, and a first back plate facing the first membrane via a first air gap, the second conversion portion includes a second through hole, a second membrane covering the second through hole, and a second back plate facing the second membrane via a second air gap, and an area of the second membrane is 1.21 times or more and 2.25 times or less an area of the first membrane when viewed in a thickness direction of the substrate.

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