Patent ID: 8004157

Claim:
A piezoelectric resonator plate in which excitation electrodes having different potentials and lead electrodes connected to the excitation electrodes so as to electrically connect the excitation electrodes to external electrodes are provided on a substrate having first and second major surfaces, and the lead electrodes are connected via a conductive adhesive to the external electrodes, wherein an electrode forming region for providing the lead electrodes is set on the substrate, an adhesion reinforcing portion for reinforcing adhesion to the conductive adhesive is provided in at least one of opposed side surfaces of the substrate in the electrode forming region for the lead electrodes, and the adhesion reinforcing portion is a notch portion which is cut and formed in at least one of the opposed side surfaces of the substrate, the first major surface of the substrate and a notch wall surface of the notch portion constitute an adhesion surface to the conductive adhesive, and at least a portion of the wall surface of the notch portion is inclined toward the plane of the second major surface.