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    • 1. 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。
    • 2. 发明授权
    • Piezoelectric vibration component
    • 压电振动分量
    • US08330336B2
    • 2012-12-11
    • US12794144
    • 2010-06-04
    • Eitaro KamedaToru KizuAkihiro MitaniHiroaki Kaida
    • Eitaro KamedaToru KizuAkihiro MitaniHiroaki Kaida
    • H01L41/053
    • H03H9/1021
    • To obtain an inexpensive piezoelectric vibration component having vibration characteristics whose degradation resulting from deposition of moisture due to a temperature change is less likely to occur without increasing the cost of a sealing structure and the number of parts, a piezoelectric vibration component includes a piezoelectric vibrating element accommodated in a package being sealed, and when the volume of the piezoelectric vibrating element is Ve and the volume within the package obtained by subtraction of the volume Ve of the piezoelectric vibrator from the volume of the space of the package is Vp Ve/Vp>(Se×M)/{(Sp+Se)×2.72} where Se is the surface area of the piezoelectric vibrating element, Sp is the surface area of the space inside the package when the piezoelectric vibrating element inside the package is absent, and M is the maximum mass of moisture per unit volume [μg/mm3] at the use temperature and 100% relative humidity.
    • 为了获得具有振动特性的廉价的压电振动部件,其压电振动部件包括压电振动部件,压电振动部件不会增加密封结构的成本和部件数量,因此,由于温度变化导致的水分沉积导致的劣化, 容纳在被封装的封装中,并且当压电振动元件的体积为Ve时,通过从压缩振动器的空间体积减去压缩振动器的体积Ve而获得的封装体积为Vp Ve / Vp> (Se×M)/ {(Sp + Se)×2.72}其中Se是压电振动元件的表面积,Sp是包装内的压电振动元件不存在时封装内的空间的表面积, M是使用温度和100%相对湿度下每单位体积的最大水分质量[μg/ mm3]。
    • 6. 发明申请
    • PIEZOELECTRIC VIBRATION COMPONENT
    • 压电振动元件
    • US20100231094A1
    • 2010-09-16
    • US12794144
    • 2010-06-04
    • Eitaro KamedaToru KizuAkihiro MitaniHiroaki Kaida
    • Eitaro KamedaToru KizuAkihiro MitaniHiroaki Kaida
    • H01L41/053
    • H03H9/1021
    • To obtain an inexpensive piezoelectric vibration component having vibration characteristics whose degradation resulting from deposition of moisture due to a temperature change is less likely to occur without increasing the cost of a sealing structure and the number of parts, a piezoelectric vibration component includes a piezoelectric vibrating element accommodated in a package being sealed, and when the volume of the piezoelectric vibrating element is Ve and the volume within the package obtained by subtraction of the volume Ve of the piezoelectric vibrator from the volume of the space of the package is Vp Ve/Vp>(Se×M)/{(Sp+Se)×2.72} where Se is the surface area of the piezoelectric vibrating element, Sp is the surface area of the space inside the package when the piezoelectric vibrating element inside the package is absent, and M is the maximum mass of moisture per unit volume [μg/mm3] at the use temperature and 100% relative humidity.
    • 为了获得具有振动特性的廉价的压电振动部件,其压电振动部件包括压电振动部件,压电振动部件不会增加密封结构的成本和部件数量,因此,由于温度变化导致的水分沉积导致的劣化, 容纳在被封装的封装中,并且当压电振动元件的体积为Ve时,通过从压缩振动器的空间体积减去压缩振动器的体积Ve而获得的封装体积为Vp Ve / Vp> (Se×M)/ {(Sp + Se)×2.72}其中Se是压电振动元件的表面积,Sp是包装内的压电振动元件不存在时封装内的空间的表面积, M是使用温度和100%相对湿度下每单位体积的最大水分质量[μg/ mm3]。
    • 7. 发明授权
    • Longitudinally-coupled multi-mode piezoelectric bulk wave filter and electronic component
    • 纵向耦合多模压电体波滤波器和电子元件
    • US06897744B2
    • 2005-05-24
    • US10436066
    • 2003-05-13
    • Akihiro MitaniToshio NishimuraHiroaki KaidaJiro Inoue
    • Akihiro MitaniToshio NishimuraHiroaki KaidaJiro Inoue
    • H03H9/10H03H9/17H03H9/56H03H9/58H01L41/107
    • H03H9/581H03H9/1014H03H9/562
    • A longitudinally-coupled multi-mode piezoelectric bulk wave filter using the piezoelectric longitudinal effect includes a plurality of excitation electrodes extending substantially parallel to each other, a laminated piezoelectric body including a plurality of piezoelectric layers arranged between the excitation electrodes and polarized in a predetermined direction, an input electrode and output electrode disposed on a first side surface of the laminated piezoelectric body, and a ground electrode disposed on a second side surface of the laminated piezoelectric body. When an input signal is applied between the input electrode and the ground electrode, vibration modes of different orders of harmonic waves are excited and coupled so that an output signal is output between the output terminal and the ground terminal. Let T represent the dimension of the width between the opposed first and second side surfaces of the laminated piezoelectric body and D represent the distance between the adjacent excitation electrodes, and T/D is equal to or smaller than about 0.9. As a result, a longitudinally-coupled multi-mode piezoelectric bulk wave filter presenting a large out-of-band attenuation is provided.
    • 使用压电纵向效应的纵向耦合多模式压电体波滤波器包括彼此平行延伸的多个激励电极,层叠压电体,其包括布置在激励电极之间并沿预定方向极化的多个压电层 设置在层叠压电体的第一侧面上的输入电极和输出电极,以及设置在层叠压电体的第二侧面的接地电极。 当在输入电极和接地电极之间施加输入信号时,激励和耦合不同阶次谐波的振动模式,从而在输出端子和接地端子之间输出输出信号。 T表示叠层压电体的相对的第一和第二侧表面之间的宽度的尺寸,D表示相邻的激励电极之间的距离,T / D等于或小于约0.9。 结果,提供了具有大的带外衰减的纵向耦合多模压电体波滤波器。
    • 9. 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。
    • 10. 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。