Patent ID: 6040652
Filing Date: 2000-03-21
Classification: H03H

Abstract:
A piezoelectric resonator, comprising:a piezoelectric member including piezoelectric layers;a plurality of excitation electrodes disposed at respective vertical positions on or within said piezoelectric member and superposed on one another in a thickness direction of said piezoelectric member with said piezoelectric layers of said piezoelectric member interposed therebetween;lead-out electrodes respectively connected to said excitation electrodes and extending to side surfaces of the piezoelectric member at the same vertical positions as the excitation electrodes; andat least one dummy electrode disposed at least one of the vertical positions at which said excitation electrodes are disposed and arranged to have a symmetrical relationship with the lead-out electrode connected to the excitation electrode relative to the corresponding excitation electrode wherein said plurality of excitation electrodes are disposed within said piezoelectric member, a piezoelectric layer existing outside in the thickness direction of an outermost excitation electrode of said plurality of excitation electrodes.