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Square-extensional mode single-crystal silicon micromechanical RF-resonator

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9 Author(s)
Kaajakari, V. ; VTT Inf. Technol., Espoo, Finland ; Mattila, T. ; Oja, A. ; Kiihamaki, J.
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A micromechanical 13.1 MHz bulk acoustic mode (BAW) silicon resonator is demonstrated. The vibration mode can be characterized as a 2-D plate expansion that preserves the original square shape. The prototype resonator is fabricated of single-crystal silicon by reactive ion etching a silicon-on-insulator (SOI) wafer. The measured high quality factor (Q=130000) and current output (i/sub MAX/ /spl ap/ 160 /spl mu/A) make the resonator suitable for reference oscillator applications. An electrical equivalent circuit based on physical device parameters is derived and experimentally verified.

Published in:

TRANSDUCERS, Solid-State Sensors, Actuators and Microsystems, 12th International Conference on, 2003  (Volume:2 )

Date of Conference:

8-12 June 2003