A 0.35-μm CMOS-MEMS Oscillator for High-Resolution Distributed Mass Detection
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Updated: Feb 2, 2026

Using Micro-Electro-Mechanical Systems MEMS to Develop Diagnostic Tools
Published on: October 1, 2007
Rafel Perelló-Roig1, Jaume Verd2, Joan Barceló3
1System Electronic Group (Physics Department), Universitat de les Illes Balears, Palma 07122 (Balearic Islands), Spain. rafel.perello@uib.es.
Abstract:
This paper presents the design, fabrication, and electrical characterization of an electrostatically actuated and capacitive sensed 2-MHz plate resonator structure that exhibits a predicted mass sensitivity of ~250 pg·cm-2·Hz-1. The resonator is embedded in a fully on-chip Pierce oscillator scheme, thus obtaining a quasi-digital output sensor with a short-term frequency stability of 1.2 Hz (0.63 ppm) in air conditions, corresponding to an equivalent mass noise floor as low as 300 pg·cm-2. The monolithic CMOS-MEMS sensor device is fabricated using a commercial 0.35-μm 2-poly-4-metal complementary metal-oxide-semiconductor (CMOS) process, thus featuring low cost, batch production, fast turnaround time, and an easy platform for prototyping distributed mass sensors with unprecedented mass resolution for this kind of devices.
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