Load-Deflection Behavior of RF-MEMS Switches: FEA and Analytical Modeling for Prediction of Mechanical Properties

Autor: Chiara De Pascali, Alvise Bagolini, Donatella Duraccio, Pietro Siciliano, Luca Francioso
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Zdroj: Proceedings, Vol 2, Iss 13, p 968 (2018)
Druh dokumentu: article
ISSN: 2504-3900
DOI: 10.3390/proceedings2130968
Popis: SixNy/a-Si/SixNy thin film RF-MEMS switches were fabricated by unconventional PECVD process using surface micromachining approach. The mechanical properties of tri-layer were measured by nanoindentation and wafer curvature method. Deflections of switches clamped on two opposite edges were measured by a profilometer applying increasing quasi-point pressure loads. Finite Element Analysis (FEA) was used to study the mechanical behavior of clamped-clamped switches. An analytical solution was developed and validated, numerically and experimentally, to describe the load-deflection response of perforated membranes to quasi-point loads. The proposed function was used to determine the internal stress of the investigated membranes; the relative error between the predicted and calculated stress values was in the range 2.1–8.5%.
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