Design, fabrication, and experimental validation of novel flexible silicon-based dry sensors for electroencephalography signal measurements

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Abstract

Many commercially available electroencephalography (EEG) sensors, including conventional wet and dry sensors, can cause skin irritation and user discomfort owing to the foreign material. The EEG products, especially sensors, highly prioritize the comfort level during devices wear. To overcome these drawbacks for EEG sensors, this paper designs Societe Generale de Surveillance S A c(SGS)-certified, silicon-based dry-contact EEG sensors (SBDSs) for EEG signal measurements. According to the SGS testing report, SBDSs extract does not irritate skin or induce noncytotoxic effects on L929 cells according to ISO10993-5. The SBDS is also lightweight, flexible, and nonirritating to the skin, as well as capable of easily fitting to scalps without any skin preparation or use of a conductive gel. For forehead and hairy sites, EEG signals can be measured reliably with the designed SBDSs. In particular, for EEG signal measurements at hairy sites, the acicular and flexible design of SBDS can push the hair aside to achieve satisfactory scalp contact, as well as maintain low skin-electrode interface impedance. Results of this paper demonstrate that the proposed sensors perform well in the EEG measurements and are feasible for practical applications.

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Yu, Y. H., Lu, S. W., Liao, L. D., & Lin, C. T. (2014). Design, fabrication, and experimental validation of novel flexible silicon-based dry sensors for electroencephalography signal measurements. IEEE Journal of Translational Engineering in Health and Medicine, 2. https://doi.org/10.1109/JTEHM.2014.2367518

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