Hac. Tilmans et al., (ELECTRO)MECHANICAL CHARACTERISTICS OF ELECTROSTATICALLY DRIVEN VACUUM ENCAPSULATED POLYSILICON RESONATORS, IEEE transactions on ultrasonics, ferroelectrics, and frequency control, 41(1), 1994, pp. 4-6
The design, fabrication and performance of vacuum-encapsulated electro
statically driven polysilicon resonating beams, 210-510 mum long, 100
mum wide, and 1.5 mum thick, are described. The shortest beams have a
fundamental frequency of 324 kHz, a gauge factor of 2400 and a quality
factor of 600 at cavity pressures of 0.15 mbar. Intrinsic quality fac
tors of 18 000 were measured below 0.01 mbar.