Laminated piezoelectric component e.g. filter, has resonant frequency change resulting from heating piezoelectric substrate countered by that caused by stress applied by covering substrate and adhesive

摘要

The component has a piezoelectric substrate (1,2) with trembler electrodes on its surface, a cover substrate (10,11) forming a laminated mass with the piezoelectric substrate and an adhesive (7,9) between the substrates. The modulus of elasticity and the thickness of the adhesive are specified so that the change in resonant frequency resulting from the heat applied to the piezoelectric substrate is countered by that caused by the stress applied to the substrate by the covering substrate and adhesive