Abstract
This paper presents the design and characterization of a piezoelectrically-transduced (AlN) on silicon micro-mechanical resonator operating in its lateral bulk acoustic width-extensional mode at 28.73 MHz. The equivalent m-BVD model of the resonator is extracted using a least-squares-error algorithm which is presented in this paper. We report a mechanical Q factor of 5970 and motional resistance Rx of 273 Ω in vacuum (p0 = 30 mTorr) for the fundamental bulk acoustic mode for a 240 μm × 149 μm resonator. A good fit between the m-BVD model and the experimental data is obtained using the numerical fitting algorithm.
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