Patent ID: 6163101
Filing Date: 2000-12-19
Classification: H03H

Abstract:
A piezoelectric resonator comprising:an energy trap piezoelectric resonance element adapted to vibrate in a third harmonic of thickness extensional vibration, the piezoelectric resonance element including a piezoelectric substrate and a pair of excitation electrodes respectively provided on a pair of major surfaces of the piezoelectric substrate opposed to each other so as to face each other with the piezoelectric substrate disposed therebetween, a portion of the piezoelectric substrate sandwiched by the excitation electrodes defining a vibrating portion;a packaging member arranged to define a vibration space which encloses at least the vibrating portion so as to allow vibration of the vibrating portion, the vibrating portion being arranged such that the center thereof is displaced from the center of the vibration space as viewed along the major surface of the piezoelectric resonance element; anda seal portion provided around the vibration space so as to damp leakage vibration.