Flexible PCB Failures From Dynamic Activity and Their Impacts on Bioimpedance Measurements: A Wearable Case Study

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dc.contributor.authorCritcher, Shelby
dc.contributor.authorFreeborn, Todd J.
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.date.accessioned2023-09-28T19:33:27Z
dc.date.available2023-09-28T19:33:27Z
dc.date.issued2021
dc.description.abstractWearable health monitoring systems that collect data in free-living environments are becoming increasingly popular. Flexible printed circuits provide a commercially available option that can conform to the shape of a wearable system and support electronic sensing and flexible interconnect. However, repetitive dynamic activity can stress and damage the interconnect of flexible PCBs which degrades data quality. This case study evaluated the performance of flexible PCBs providing interconnect between electrodes and sensing electronics for tissue bioimpedance measurements in a wearable system. Resistance data (1 kHz to 128 kHz) was collected from localized knee tissues of 3 participants using the wearable design with flexible PCBs over 7 days of free-living. From electrical and optical inspection after use trace cracking of the flexible PCBs occurred, degrading tissue resistances reported by the wearable system. Exploration of these results advances understanding of how flexible PCBs perform in free-living conditions for wearable bioimpedance applications.en_US
dc.format.mediumelectronic
dc.format.mimetypeapplication/pdf
dc.identifier.citationCritcher, S., & Freeborn, T. J. (2021). Flexible PCB Failures From Dynamic Activity and Their Impacts on Bioimpedance Measurements: A Wearable Case Study. In IEEE Open Journal of Circuits and Systems (Vol. 2, pp. 732–742). Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/ojcas.2021.3122369
dc.identifier.doi10.1109/OJCAS.2021.3122369
dc.identifier.orcidhttps://orcid.org/0000-0001-9979-7301
dc.identifier.orcidhttps://orcid.org/0000-0002-8888-2452
dc.identifier.urihttps://ir.ua.edu/handle/123456789/11414
dc.languageEnglish
dc.language.isoen_US
dc.publisherIEEE
dc.rights.licenseAttribution 4.0 International (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectFlexible printed circuits
dc.subjectAtmospheric measurements
dc.subjectWearable computers
dc.subjectIntegrated circuit interconnections
dc.subjectBioimpedance
dc.subjectInspection
dc.subjectParticle measurements
dc.subjectwearable sensors
dc.subjectfailure analysis
dc.subjecttrace cracking
dc.subjectbioimpedance
dc.subjectTISSUE BIOIMPEDANCE
dc.subjectLOW-COST
dc.subjectARRAY
dc.subjectEngineering, Electrical & Electronic
dc.titleFlexible PCB Failures From Dynamic Activity and Their Impacts on Bioimpedance Measurements: A Wearable Case Studyen_US
dc.typeArticle
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