FILM BULK ACOUSTIC RESONATOR
    6.
    发明申请
    FILM BULK ACOUSTIC RESONATOR 审中-公开
    电影大音量谐振器

    公开(公告)号:US20080284542A1

    公开(公告)日:2008-11-20

    申请号:US11923117

    申请日:2007-10-24

    IPC分类号: H03H9/15

    摘要: A film bulk acoustic resonator includes: a substrate; a lower electrode held on the substrate with at least a portion thereof being in a hollow state; a piezoelectric film provided on the lower electrode; and an upper electrode provided on the piezoelectric film. At least one of the lower electrode and the upper electrode is primarily composed of copper (Cu) and further contains a first element having a negatively larger free energy of oxide formation (ΔG) than copper. At least one of the lower electrode and the upper electrode is primarily composed of copper (Cu) and further contains a second element having smaller surface energy than copper.

    摘要翻译: 膜体声波谐振器包括:基板; 保持在所述基板上的下电极,其至少一部分处于中空状态; 设置在下电极上的压电膜; 以及设置在压电膜上的上电极。 下电极和上电极中的至少一个主要由铜(Cu)组成,并且还包含具有比铜更大的氧化物形成自由能(ΔG)的较大的第一元素。 下电极和上电极中的至少一个主要由铜(Cu)组成,并且还包含比铜更小的表面能的第二元件。