Influence of induced stress on AlN-solidly mounted resonators

The frequency variation of solidly mounted resonators made with AlN thin films operating in longitudinal and shear acoustic modes with induced in plane mechanical strain is presented. The induced deformation range is in the hundreds of microstrains and the frequency variations in the hundreds of kHz, giving coefficients of resonant frequency with deformation in the order of 56% per unit strain. The influence on this parameter of the resonant mode, coupling factor and frequency is analyzed.

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Universidad Politécnica de Madrid
Spain

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