Metal microelectromechanical oscillator exhibiting ultra-high water vapor resolution.

Verd, J; Sansa, M; Uranga, A; Perez-Murano, F; Segura, J; Barniol, N · Lab Chip · 2011

basic_science · Level V

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Abstract

Water vapor sensing characterization of a metal resonator fabricated with an industrial 0.35 μm CMOS technology is reported. The resonator frequency is ∼13.2 MHz and exhibits a sensitivity magnitude of ∼3.5 kHz per %RH without requiring any additional hygroscopic coating layer. An on-chip integrated oscillator circuit enables an unprecedented resolution of 0.005 %RH.

Medical subject headings