Filter and duplexer
    3.
    发明授权
    Filter and duplexer 有权
    过滤器和双工器

    公开(公告)号:US07786649B2

    公开(公告)日:2010-08-31

    申请号:US11790530

    申请日:2007-04-26

    IPC分类号: H01L41/04

    CPC分类号: H03H9/564 H03H9/568

    摘要: A filter includes piezoelectric thin-film resonators having a substrate, a lower electrode supported by the substrate, a piezoelectric film provided on the lower electrode, and an upper electrode provided on the piezoelectric film. At least one of the piezoelectric thin-film resonators has a portion in which the upper electrode overlaps the lower electrode across the piezoelectric film. The above portion has a shape different from shapes of corresponding portions of other piezoelectric thin-film resonators, so that a spurious component in the above at least one of the piezoelectric thin-film resonators occur at a frequency different from frequencies of spurious components that occur in the other piezoelectric thin-film resonators.

    摘要翻译: 滤波器包括具有基板,由基板支撑的下电极,设置在下电极上的压电膜和设置在压电膜上的上电极的压电薄膜谐振器。 压电薄膜谐振器中的至少一个具有上电极跨越压电膜与下电极重叠的部分。 上述部分具有与其它压电薄膜谐振器的相应部分的形状不同的形状,使得上述至少一个压电薄膜谐振器中的杂散分量以与发生的杂散分量的频率不同的频率出现 在其他压电薄膜谐振器中。

    Filter and duplexer
    4.
    发明申请
    Filter and duplexer 有权
    过滤器和双工器

    公开(公告)号:US20070252662A1

    公开(公告)日:2007-11-01

    申请号:US11790530

    申请日:2007-04-26

    IPC分类号: H03H9/70 H03H9/58

    CPC分类号: H03H9/564 H03H9/568

    摘要: A filter includes piezoelectric thin-film resonators having a substrate, a lower electrode supported by the substrate, a piezoelectric film provided on the lower electrode, and an upper electrode provided on the piezoelectric film. At least one of the piezoelectric thin-film resonators has a portion in which the upper electrode overlaps the lower electrode across the piezoelectric film. The above portion has a shape different from shapes of corresponding portions of other piezoelectric thin-film resonators, so that a spurious component in the above at least one of the piezoelectric thin-film resonators occur at a frequency different from frequencies of spurious components that occur in the other piezoelectric thin-film resonators.

    摘要翻译: 滤波器包括具有基板,由基板支撑的下电极,设置在下电极上的压电膜和设置在压电膜上的上电极的压电薄膜谐振器。 压电薄膜谐振器中的至少一个具有上电极跨越压电膜与下电极重叠的部分。 上述部分具有与其它压电薄膜谐振器的相应部分的形状不同的形状,使得上述至少一个压电薄膜谐振器中的杂散分量以与发生的杂散分量的频率不同的频率出现 在其他压电薄膜谐振器中。

    Surface acoustic wave device
    7.
    发明申请
    Surface acoustic wave device 失效
    表面声波装置

    公开(公告)号:US20050190014A1

    公开(公告)日:2005-09-01

    申请号:US11065363

    申请日:2005-02-25

    IPC分类号: H03H9/145 H03H9/25 H03H9/64

    摘要: A surface acoustic wave device includes a surface acoustic wave resonator. The surface acoustic wave resonator includes comb-like electrodes and reflection electrodes provided on both sides of the comb-like electrodes, and each of the reflection electrodes has at least two different pitches. It is thus possible to suppress the ripple components.

    摘要翻译: 表面声波装置包括表面声波谐振器。 表面声波谐振器包括梳状电极和设置在梳状电极两侧的反射电极,并且每个反射电极具有至少两个不同的间距。 因此可以抑制纹波成分。