Patent ID: 6377135
Filing Date: 2002-04-23
Classification: H03H

Abstract:
An energy trap-type piezoelectric resonator comprising:a piezoelectric substrate plate having a first main surface and a second main surface; first and second resonant electrodes provided on the first and second main surfaces of the piezoelectric substrate plate, respectively, to form an energy trap-type piezoelectric vibrating section; and first and second capacitor electrodes provided on the first and second main surfaces of the piezoelectric substrate plate, respectively, said first and second capacitor electrodes being arranged one above the other with the piezoelectric substrate plate interposed therebetween; wherein the first and the second capacitor electrodes are configured to extend on the first and the second main surfaces to edges thereof; and the first capacitor electrode is provided to be spaced by a desired margin area from an adjacent outside edge of the piezoelectric substrate plate, except at lead portions of said first capacitor electrode led out to said adjacent outside edge.