Patent ID: 6014799
Filing Date: 2000-01-18
Classification: H03H,Y10T

Abstract:
A method of manufacturing a piezoelectric resonator including a piezoelectric body, a plurality of first and second excitation electrodes overlapping each other with the piezoelectric body disposed therebetween so as to define an excitation portion, a first lead electrode extending from the corresponding first excitation electrodes to an edge portion of the piezoelectric body and connected to a first electric potential, and a second lead electrode extending to a direction opposite from the direction which said first lead electrode is extended and connected to a second electric potential, the method comprising the steps of:providing a first mother substrate having a plurality of first strip electrodes arranged with gaps therebetween along a first direction on the first mother substrate, the first strip electrodes each extending along a second direction, the first direction extending along a direction of a line which extends between the excitation electrodes and lead electrodes and the second direction is substantially perpendicular to the first direction;obtaining a second mother substrate by cutting said first mother substrate along said second direction such that a length of the first strip electrodes in said first direction is set according to a target resonance frequency;using a mask to form a plurality of second strip electrodes on a major surface of the second mother substrate, each of said second strip electrodes constituting said second excitation electrode and said second lead electrode connected to said second electric potential along said second direction; andobtaining a plurality of piezoelectric resonators by cutting the second mother substrate along said first direction.