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    • 1. 发明申请
    • FILM BULK ACOUSTIC RESONATOR
    • 电影大音量谐振器
    • US20100156565A1
    • 2010-06-24
    • US12066317
    • 2006-07-05
    • Shuichi OkaTerukazu Ohno
    • Shuichi OkaTerukazu Ohno
    • H03H9/15
    • H03H9/132H03H9/02102H03H9/02118H03H9/02133H03H9/173
    • An object is to provide a film bulk acoustic resonator capable of improving resonant characteristics by reducing the generation of a standing wave to be caused by a transverse-mode acoustic wave to a minimum. In a film bulk acoustic resonator including a resonant portion A having a piezoelectric material layer 3 sandwiched between a first electrode 2 and a second electrode 4, the resonant portion A is configured to have a planar shape that is an ellipse having a part thereof cut off along a straight line L. The straight line L intersects at least one of a minor axis and a major axis of the ellipse, and preferably intersects both the minor axis and the major axis, and passes through the center of the ellipse.
    • 本发明的目的是提供一种能够通过将由横模式的声波引起的驻波的产生降低到最小来提高谐振特性的膜体声波谐振器。 在包括夹在第一电极2和第二电极4之间的具有压电体层3的谐振部分A的薄膜体声波谐振器中,谐振部分A被构造成具有截面的椭圆形的平面形状 直线L与椭圆的短轴和长轴中的至少一个相交,并且优选地与短轴和长轴相交,并且穿过椭圆的中心。