Patent ID: 7902731

Claim:
A piezoelectric resonator device, in which a package having an internal space is made up of a base and a lid, and a piezoelectric resonator plate is held on the base inside the internal space, wherein an +X axial direction of the piezoelectric resonator plate in the internal space is set and wherein the piezoelectric resonator plate is made up of a base component and a plurality of leg components that protrude from the base component, excitation electrodes having different potential are formed on the leg components, lead electrodes that are drawn from the excitation electrodes in order to electrically connect the excitation electrodes with external electrodes at the base component are formed on the base component and the leg components, and a groove is formed in a front main face of the base component from at least one side face in the .+−.X axial directions, wherein no grooves are formed in the rear main face.