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    • 7. 发明授权
    • Surface acoustic wave device
    • 表面声波装置
    • US5302877A
    • 1994-04-12
    • US29514
    • 1993-03-11
    • Takahiro SatoHidenori Abe
    • Takahiro SatoHidenori Abe
    • H03H9/25H03H9/02H03H9/64H01L41/08
    • H03H9/02543
    • A surface acoustic wave device comprises lithium tetraborate single crystal substrate to make use of surface acoustic waves with higher propagation velocities and smaller propagation losses, whereby frequencies to be signal-processed can be as high as above 1 GHz. The surface acoustic wave device comprises a metal film formed on a surface of a lithium tetraborate single crystal substrate, the metal film being for exciting, receiving, reflecting and/or propagating surface acoustic waves, the metal film being so formed that a cut angle of the substrate, and a propagation direction of the surface acoustic waves are in an Eulerian angle representation of (39.degree.-51.degree., 66.degree.-114.degree., -20.degree.-20.degree.) and directions equivalent thereto. In this propagation direction few Rayleigh waves exit, and only surface acoustic waves of high propagation velocity are generated. Propagation losses can be eliminated.
    • 表面声波装置包括四硼酸锂单晶基板,以利用具有较高传播速度和较小传播损耗的表面声波,由此待信号处理的频率可高达1GHz以上。 表面声波装置包括形成在四硼酸锂单晶基板的表面上的金属膜,金属膜用于激发,接收,反射和/或传播表面声波,金属膜被形成为使得金属膜的切割角度 衬底和表面声波的传播方向处于(39度-51度,66度-114度,-20度-20度)和与此相当的方向的欧拉角度表示。 在这个传播方向上,很少的瑞利波出射,只有高传播速度的表面声波才产生。 传播损失可以消除。
    • 8. 发明授权
    • Surface acoustic wave device
    • 表面声波装置
    • US5434465A
    • 1995-07-18
    • US236015
    • 1994-05-02
    • Takahiro SatoHidenori Abe
    • Takahiro SatoHidenori Abe
    • H03H9/25H03H9/02H01L41/08
    • H03H9/02543
    • A surface acoustic wave device comprises a piezoelectric substrate of lithium tetraborate single crystal, and a metal film formed on the surface of the piezoelectric substrate for exciting, receiving, reflecting and/or propagating surface acoustic waves, the metal film being so formed that a cut angle of the surface of the piezoelectric substrate and propagation direction of the surface acoustic wave are an Eulerian angle representation of (0.degree.-45.degree., 30.degree.-90.degree., 40.degree.-90.degree.) and directions equivalent thereto, the surface acoustic wave having higher propagation velocity than Rayleigh waves and leaky waves, and a characteristic of radiating part of energy of the surface acoustic wave into the piezoelectric surface while propagating.
    • 表面声波装置包括四硼酸锂单晶的压电基板和形成在压电基板的表面上用于激发,接收,反射和/或传播表面声波的金属膜,金属膜被形成为切割 压电基板表面的角度和表面声波的传播方向是(0°-45°,30°-90°,40°-90°)和与其等效的方向的欧拉角表示,表面声波 具有比瑞利波和泄漏波更高的传播速度,以及在传播时将表面声波的能量的一部分辐射到压电表面中的特性。