Piezoelectric oscillator

Patent Granted PROBLEM TO BE SOLVED: To provide a piezoelectric oscillator having a superior Q-value and conductance value. ; SOLUTION: This piezoelectric oscillator comprises a piezoelectric substrate, at least a pair of excitation electrodes disposed on the front surface of the piezoelectric substrate, and a conductive film disposed on the back surface of the piezoelectric substrate. The piezoelectric substrate has a projecting thick part on the front surface side.