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    • 7. 发明申请
    • PIEZOELECTRIC VIBRATOR
    • 压电振动器
    • US20080290759A1
    • 2008-11-27
    • US12187965
    • 2008-08-07
    • Hiroaki KaidaShungo KanaiHitoshi Sakaguchi
    • Hiroaki KaidaShungo KanaiHitoshi Sakaguchi
    • H01L41/04H01L41/24
    • H03H9/177H03H9/0207H03H9/131H03H9/562Y10T29/42
    • An energy-trapping strip piezoelectric vibrator utilizing a third harmonic overtone of a thickness shear mode is provided. A piezoelectric vibrator 1 has a strip piezoelectric ceramic substrate 2 polarized in a longitudinal direction, and first and second excitation electrodes 3 and 4 provided on first and second principal surfaces 2a and 2b of the piezoelectric ceramic substrate 2. An excitation region 5 including a piezoelectric vibration portion that includes a portion where the first and second excitation electrodes 3 and 4 overlap and that utilizes harmonics of the thickness shear mode is formed. A region around the piezoelectric vibration portion is set as a non-excitation region. At least a region of the non-excitation region neighboring the piezoelectric vibration portion is a region having the same polarization axis direction as the excitation region 5 and a relatively small polarization degree or is an unpolarized region.
    • 提供了利用厚度剪切模式的三次谐波泛音的能量捕获带压电振动器。 压电振动器1具有沿纵向极化的带状压电陶瓷基板2,以及设置在压电陶瓷基板2的第一和第二主面2a,2b上的第一和第二激励电极3,4。 形成包括第一和第二激励电极3和4重叠的部分并且利用厚度剪切模式的谐波的振动部分。 压电振动部周围的区域被设定为非激励区域。 至少与压电振动部分相邻的非激​​发区域的区域是具有与激发区域5相同的偏振轴方向和相对较小偏振度的区域或者是非偏振区域。
    • 8. 发明申请
    • Energy Confinement Piezoelectric Resonator
    • 能量限制压电谐振器
    • US20080179994A1
    • 2008-07-31
    • US10559240
    • 2005-04-20
    • Hitoshi SakaguchiHiroaki KaidaTakashi Hase
    • Hitoshi SakaguchiHiroaki KaidaTakashi Hase
    • H03H9/17H01L41/047H01L41/083
    • H03H9/0207H03H9/177
    • An energy trap piezoelectric resonator makes use of a harmonic wave in a thickness longitudinal vibration mode and can effectively suppress a spurious fundamental wave in a thickness longitudinal vibration mode without significantly suppressing the harmonic wave that is used for the resonator. The energy trap piezoelectric resonator has a first excitation electrode disposed at an upper surface of a piezoelectric substrate polarized in a thickness direction and a second excitation electrode disposed at a lower surface, and a floating electrode disposed at least one of the upper surface and/or the lower surface of the piezoelectric substrate so as to extend towards and away from the first excitation electrode with respect to a node of an electric potential distribution based on electric charges generated by the fundamental wave that is propagated when an energy trap vibration portion where the excitation electrodes oppose each other is excited.
    • 能量阱压电谐振器利用厚度纵向振动模式的谐波,并且可以有效地抑制厚度纵向振动模式中的杂波基波,而不会显着地抑制用于谐振器的谐波。 能量阱压电谐振器具有设置在厚度方向偏振的压电基板的上表面的第一激励电极和设置在下表面的第二激励电极,以及设置在上表面和/或 所述压电基板的下表面相对于电位分布的节点朝向和远离所述第一激励电极延伸,所述电位分布基于由所述基波产生的电荷,所述基波在所述激发 电极彼此反对激动。
    • 10. 发明授权
    • Composite vibration device
    • 复合振动装置
    • US06717335B2
    • 2004-04-06
    • US09993963
    • 2001-11-27
    • Toshio NishimuraJiro InoueHiroaki KaidaAkihiro Mitani
    • Toshio NishimuraJiro InoueHiroaki KaidaAkihiro Mitani
    • H01L4104
    • H03H9/0514H03H9/178
    • A composite vibration device includes a piezoelectric element defining a vibrating member, which is made of a material having a first acoustical impedance, first and second reflecting layers are connected to respective end surfaces of the piezoelectric element, each of the layers are made of a material having a second acoustical impedance lower than the first acoustical impedance, and first and second supporting members. Each of the first and second supporting members is made of a material having an acoustical impedance higher than the second acoustical impedance and is connected to the outer surface of each of the first and second reflecting layers. Vibrations propagated from the piezoelectric element are reflected at the interfaces between the reflecting layers and the supporting members.
    • 复合振动装置包括限定由具有第一声阻抗的材料制成的振动部件的压电元件,第一和第二反射层连接到压电元件的相应端表面,每个层由材料制成 具有低于第一声阻抗的第二声阻抗,以及第一和第二支撑构件。 第一和第二支撑构件中的每一个由具有高于第二声阻抗的声阻抗的材料制成,并且连接到第一和第二反射层中的每一个的外表面。 从压电元件传播的振动在反射层和支撑构件之间的界面处被反射。