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    Elastic wave device
    1.
    发明授权
    Elastic wave device 有权

    公开(公告)号：US11528008B2

    公开(公告)日：2022-12-13

    申请号：US15924307

    申请日：2018-03-19

    Applicant: Murata Manufacturing Co., Ltd.

    Inventor： Katsuya Daimon ,  Akira Michigami ,  Yasuharu Nakai ,  Toshimaro Yoneda

    IPC: H03H9/25 ,  H03H9/02 ,  H01L41/187 ,  H03H9/145 ,  H01L41/047 ,  H03H9/64

    Abstract: An elastic wave device includes a piezoelectric substrate, elastic wave resonators on or in the piezoelectric substrate, and a dielectric film disposed on the piezoelectric substrate and covering the elastic wave resonators. The elastic wave resonators includes respective IDT electrodes on the piezoelectric substrate. When a wavelength specified by an electrode finger pitch of the IDT electrode is denoted as λ, at least two of the elastic wave resonators have the different wavelengths. In two of the elastic wave resonators having different wavelengths, a film thickness of the IDT electrode in the elastic wave resonator having the longer wavelength is not greater than that of the IDT electrode in the elastic wave resonator having the shorter wavelength. Film thicknesses of the IDT electrodes in at least two of the elastic wave resonators are different from each other. The elastic wave device utilizes a Rayleigh wave.

    CHARGING CIRCUIT AND MODULE USING THE SAME
    2.
    发明申请
    CHARGING CIRCUIT AND MODULE USING THE SAME 审中-公开
    充电电路和使用它的模块

    公开(公告)号：US20160380474A1

    公开(公告)日：2016-12-29

    申请号：US15262214

    申请日：2016-09-12

    Applicant: Murata Manufacturing Co., Ltd.

    Inventor： Yasuharu Nakai ,  Masaharu ltaya ,  Yusuke Yoshida ,  Yasuhiro Kuratani ,  Masako Tenpaku ,  Yoshifumi Wada

    IPC: H02J7/35 ,  H01M10/46 ,  H01M10/42 ,  H02J7/00

    Abstract: A module includes a charging circuit and a driven unit. The charging circuit includes a power generation element and an electric storage element. The power generation element is connected to the electric storage element to charge the electric storage element. The electric storage element is connected to the driven unit to drive the driven unit with electric power stored. The power-generating voltage of the power generation element has a value equal to or more than the charging voltage of the electric storage element. The electric storage element is a secondary battery including a lithium-transition metal oxide in a positive electrode active material layer, and a lithium-titanium oxide of spinel-type crystal structure in a negative electrode active material layer.

    Abstract translation: 模块包括充电电路和从动单元。 充电电路包括发电元件和蓄电元件。 发电元件连接到蓄电元件以对蓄电元件充电。 蓄电元件与被驱动单元连接，驱动被驱动单元蓄电。 发电元件的发电电压具有等于或大于蓄电元件的充电电压的值。 蓄电元件是在正极活性物质层中含有锂过渡金属氧化物的二次电池和负极活性物质层中的尖晶石型晶体结构的锂钛氧化物。

    Elastic wave device, high-frequency front end circuit, and communication apparatus
    3.
    发明授权
    Elastic wave device, high-frequency front end circuit, and communication apparatus 有权

    公开(公告)号：US11595024B2

    公开(公告)日：2023-02-28

    申请号：US16429098

    申请日：2019-06-03

    Applicant: Murata Manufacturing Co., Ltd.

    Inventor： Hideaki Takahashi ,  Hirokazu Sakaguchi ,  Yasuharu Nakai

    IPC: H03H9/145 ,  H03H9/02 ,  H03H9/25 ,  H03H9/64 ,  H03H9/72

    Abstract: An elastic wave device includes a piezoelectric substrate, an IDT electrode on the piezoelectric substrate, and a silicon oxide film arranged on the piezoelectric substrate to cover the IDT electrode. The IDT electrode includes first and second electrode layers laminated on each other, the first electrode layer is made of metal or an alloy with a density higher than a density of metal of the second electrode layer and a density of silicon oxide of the silicon oxide film, the piezoelectric substrate is made of LiNbO3 and θ is in a range of equal to or greater than about 8° and equal to or less than about 32° with Euler Angles (0°±5°, θ, 0°±10°) of the piezoelectric substrate, and the silicon oxide film contains hydrogen atoms, hydroxyl groups, or silanol groups.

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