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    • 6. 发明公开
    • KT cut width-extensional mode quartz crystal resonator
    • Quarzkristall-Resonator im Breitenausdehnungsmodus mit KT-Schnitt。
    • EP0496583A2
    • 1992-07-29
    • EP92300508.6
    • 1992-01-21
    • SEIKO ELECTRONIC COMPONENTS LTD.
    • Kawashima,Hirofumi,c/o Seiko Electr.Components Ltd
    • H03H9/19H03H9/05
    • H03H9/02023H03H9/02157H03H9/0595H03H9/19
    • Hitherto, resonators of the this type have been formed by mechanical machining in a plane perpendicular to the z axis and have suffered from the disadvantages of problems when reducing the size in mounting, high series resistance, poor shock resistance and spurious noise.
      A width-extensional mode quartz crystal resonator (2, 68, 80) is formed from a quartz crystal which is cut along a plane defined in the O-xyz coordinate system of the quartz crystal lattice by rotating the original Z plane around the x axis by a rotation angle in the range 20°-35°. The quartz crystal resonator has a thickness-to-width ratio R zx in the range 0.25-0.80. A pair of excitation electrodes (3-10;13-20; 22-33; 36-51; 57, 59; 65, 66, 74, 75; 86, 87) are disposed on the resonator along the opposed side faces perpendicular to the widthwise direction to induce the width-extensional vibration. The resonator is also formed by an etching process together with its mounting means (69-73, 78; 81-85).
    • 到目前为止,这种类型的谐振器是通过在垂直于z轴的平面上进行机械加工形成的,并且在减小安装尺寸,高串联电阻,差的抗冲击性和杂散噪声方面存在问题的缺点。 宽度延伸模式石英晶体谐振器(2,88,80)由石英晶体形成,该石英晶体沿着在石英晶格的O-xyz坐标系中限定的平面切割,通过围绕x轴旋转原始Z平面 旋转角度在20°-35°。 石英晶体谐振器的厚度 - 宽度比Rzx在0.25-0.80范围内。 一对激励电极(3-10; 13-20; 22-33; 36-51; 57,59; 65,66,74,75,65,86,87)沿着垂直于 宽度方向引起宽度 - 拉伸振动。 谐振器也与其安装装置(69-73,78,81-85)一起通过蚀刻工艺形成。