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Formation of a Complex Topologies of SAW-Based Inertial Sensors by Laser Thin Film Local Evaporation.

Alexander S KukaevDmitry LukyanovDenis A MikhailenkoDaniil SafronovSergey Yu ShevchenkoVladimir VenediktovAndrey Vlasov
Published in: Micromachines (2020)
Originally, sensors based on surface acoustic waves are fabricated using photolithography, which becomes extremely expensive when a small series or even single elements are needed for the research. A laser thin film local evaporation technique is proposed to substitute the photolithography process in the production of surface acoustic wave based inertial sensors prototypes. To estimate its potential a prototype of a surface acoustic wave gyroscope sensing element was fabricated and tested. Its was shown that the frequency mismatch is no more than 1%, but dispersion of the wave on small inertial masses leads to a spurious parasitic signal on receiving electrodes. Possible ways of its neglecting is discussed.
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