Tuning fork type quartz crystal element and crystal device using the tuning fork type quartz crystal element

摘要

The present invention provides a tuning fork type quartz crystal element capable of suppressing vibration leakage of the tuning fork type quartz crystal element and reducing deterioration of equivalent series resistance. SOLUTION: A tuning fork type quartz crystal element 120 has a rectangular quartz crystal base 121 having an XY′Z ′ orthogonal coordinate system in a crystal axis and a thickness in a direction along the Z ′ axis, and a side surface of the quartz crystal base 121. A pair of quartz crystal vibrating parts 123 extending along the Y ′ axis, excitation electrodes 125 and 126 provided on the main surface and side surfaces of the pair of quartz crystal vibrating parts 123, and a pair of quartz crystal vibrating parts 123 to the quartz crystal base A lead-out electrode 127 electrically connected to the excitation electrodes 125 and 126, and a notch C provided near the lead-out electrode 127 along the Y 'axis from the outer peripheral edge of the quartz crystal base 121. There is. [Selected figure] Figure 1