Skin-Potential Variation Insensitive Dry Electrodes for ECG Recording
Objective: A skin-potential variation (SPV) insensitive dry electrode is developed to remove the interference of SPV. Methods: Based on a conventional microneedles array-based electrode, a layer of Parylene membrane is coated at the root of microneedles to insulate the electrode from the corneum layer. Only tips of the needles are exposed to make it can contact with the stratum germinativum layer directly. Results: As a result, skin potential will not be coupled into the recording electrode. Thus, SPV will not influence the biopotential recording in the dynamic state. Conclusion: The proposed electrode is potential for a device which is insensitive to the motion noise source from SPV. Significance: It paves the way for applications of the proposed dry electrode in the wearable technology which require strong anti-motion interference ability.
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