Patent ID: 7541716
Filing Date: 2009-06-02
Classification: H03H

Abstract:
1. A resonator comprising: a piezoelectric ceramic resonator with a vibrating electrode formed; and a substrate which supports the piezoelectric ceramic resonator, wherein the substrate comprises terminal electrodes, and the piezoelectric ceramic resonator is supported on the substrate by the terminal electrodes at both ends and is in electrical continuity with the vibrating electrode via a conductive member, and wherein the piezoelectric ceramic resonator satisfies a condition of U>0.88×H+20.28, wherein U=maximum elastic energy (kJ/m the piezoelectric ceramic resonator comprises a perovskite compound represented by Pbα[(Mn as additives, Al in a content of 5.0 wt % or less in terms of Al a distance L between the terminal electrodes in the resonator is 4.06λ, where λ is the wavelength of the piezoelectric ceramic resonator.