Piezoelectric vibrator

Abstract

The invention relates to a piezoelectric vibrator. A piezoelectric vibrator includes: a piezoelectric vibration element having a piezoelectric layer, excitation electrodes provided on main surfaces on both sides of the piezoelectric layer in a thickness direction, and extraction electrodes electrically connected to the excitation electrodes and extracted to a peripheral edge side of the main surfaces of the piezoelectric layer; a first substrate provided on one main surface side of the piezoelectric layer; a first adhesive layer provided between the first substrate and the piezoelectric layer; a second substrate provided on the other main surface side of the piezoelectric layer; and a second adhesive layer provided between the second substrate and the piezoelectric layer, the second substrate having an external electrode provided on a peripheral edge portion of a surface opposite to the piezoelectric layer and electrically connected to the extraction electrode, and the external electrode being electrically connected to the extraction electrode in a plan view of the surface opposite to the piezoelectric layer in the second substrate. The second substrate has a cutout portion that exposes the inclined portion of the second adhesive layer extending toward the outside of the second substrate and the lead-out end portion of the lead-out electrode, and a connection electrode that electrically connects the external electrode and the lead-out end portion is provided on the inclined surface of the second adhesive layer and the cutout portion of the second substrate.

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