CUED Publications database

Low loss HF band SOI wine glass bulk mode capacitive square-plate resonator

Lee, JEY and Yan, J and Seshia, AA (2009) Low loss HF band SOI wine glass bulk mode capacitive square-plate resonator. Journal of Micromechanics and Microengineering, 19. ISSN 0960-1317

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This paper reports on the design and electrical characterization of a single crystal silicon micromechanical square-plate resonator. The microresonator has been excited in the anti-symmetrical wine glass mode at a resonant frequency of 5.166 MHz and exhibits an impressive quality factor (Q) of 3.7 × 106 at a pressure of 33 mtorr. The device has been fabricated in a commercial foundry process. An associated motional resistance of approximately 50 kΩ using a dc bias voltage of 60 V is measured for a transduction gap of 2 νm due to the ultra-high Q of the resonator. This result corresponds to a frequency-Q product of 1.9 × 1013, the highest reported for a fundamental mode single-crystal silicon resonator and on par with some of the best quartz crystal resonators. The results are indicative of the superior performance of silicon as a mechanical material, and show that the wine glass resonant mode is beneficial for achieving high quality factors allowed by the material limit. © 2009 IOP Publishing Ltd.

Item Type: Article
Divisions: Div C > Applied Mechanics
Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:19
Last Modified: 27 Oct 2020 07:31
DOI: 10.1088/0960-1317/19/7/074003