In this work, we investigate how the selection of PDMS encapsulant, Sylgard 160 and Sylgard 184, affects the transmit and receive performance of immersion coupled PVD PZT PMUTs under the influence of DC bias. First, the benefit of having PDMS encapsulant has been demonstrated through acoustic characterization. Experiments were performed under immersion to determine the TRX frequency responses of the DUTs to show a 998% to 1085% improvement in TRX signal levels with DC bias as compared to the performance without bias for both types of PDMS, respectively. Second, a performance comparison of the encapsulation polymers was performed. Sylgard 160 encapsulated devices displayed 1.61 times more signal strength compared to Sylgard 184 encapsulated devices at their respective peak frequencies.
Choong, D.S.W., Ghosh, S., Thien, Y.F., Sarafianou, M., Goh, D.J., Merugu, S., et al. (2025). Bias Optimization and Polymer Encapsulation Synergy for Immersion PMUTs: A Comparative Study of Sylgard 160 and 184. In Proceedings of IEEE Sensors (pp.1-4). Institute of Electrical and Electronics Engineers Inc. [10.1109/sensors59705.2025.11330649].
Bias Optimization and Polymer Encapsulation Synergy for Immersion PMUTs: A Comparative Study of Sylgard 160 and 184
Savoia, Alessandro Stuart;
2025-01-01
Abstract
In this work, we investigate how the selection of PDMS encapsulant, Sylgard 160 and Sylgard 184, affects the transmit and receive performance of immersion coupled PVD PZT PMUTs under the influence of DC bias. First, the benefit of having PDMS encapsulant has been demonstrated through acoustic characterization. Experiments were performed under immersion to determine the TRX frequency responses of the DUTs to show a 998% to 1085% improvement in TRX signal levels with DC bias as compared to the performance without bias for both types of PDMS, respectively. Second, a performance comparison of the encapsulation polymers was performed. Sylgard 160 encapsulated devices displayed 1.61 times more signal strength compared to Sylgard 184 encapsulated devices at their respective peak frequencies.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
