PROJECT TITLE :

AlN film SAW resonator integrated with metal structure

ABSTRACT:

A novel surface acoustic wave (SAW) resonator integrated on a metal substrate is presented. The devices were fabricated on the aluminium nitride (AlN) thin films deposited by mid-frequency magnetron sputtering on polished TC4 titanium alloy substrates. Using a two-step growth method, AlN film with a full-width at half-maximum of 4.1° had been prepared. The AlN film SAW resonator shows a resonance frequency of 129 MHz and an electromechanical coupling coefficient of 0.28%. The measurement results agree well with the simulation results. This integrated SAW resonator can be used as a good strain sensor in metal structure health monitoring.


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