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发明公开
CN102377400A 台面型AT切割水晶振动片及水晶装置 无效 - 撤回

台面型AT切割水晶振动片及水晶装置
摘要：
本发明提供一种通过将振动部的大小做成适当的值来抑制无用振动的产生、可以防止特性的劣化的台面型AT切割水晶振动片。以38.400MHz振动的台面型AT切割水晶振动片(30)，具有矩形的励振部(31)和形成在励振部的外周且厚度薄于励振部的励振外周部(32)，当励振部的晶轴的x轴方向的长度为Mx(μm)时，励振部和励振外周部的段差的高度h(μm)满足公式(1)。h＝(0.2×Mx)-143 (1)。
摘要（英）：

The present disclosure provides a mesa-type AT-cut quartz-crystal vibrating piece, in which amount of the vibrating unit is adjusted to appropriate amount, in order to inhibit unnecessary vibration and to prevent degradation. The mesa-type AT-cut quartz-crystal vibrating piece (30) for vibrating piece vibrates at 38.400 MHz comprises a rectangular excitation unit (31), a peripheral region (32) formed in periphery of the excitation unit and thinner than the excitation unit. The thickness difference h ([mu]m) between one principal surface of the excitation unit and the adjacent peripheral region is obtained by the following equation: h=(0.2Mx)-143 The length of the x-axis direction of the crystallographic X-axis is Mx ([mu]m).

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