ABSTRACT Multilayer piezoelectric resonators were fabricated and the dependence of the electrical impedance and the coupling coefficient were measured as a function of the number of layers, for N = 1, ..., 20 layers. The magnitude of the electrical impedance followed the theoretical predicted 1/N2 relation, and the coupling coefficient, Kt, remained relatively constant out to N = 15 layers. These cofired resonators are suitable for medical ultrasound transducers.
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