Inkjet-Printed Silver Electrode Array for in-vivo Electrocorticography

Preston D. Donaldson, Leila Ghanbari, Mathew L. Rynes, Suhasa Bangalore Kodandaramaiah, Sarah L Swisher

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Electrocorticography (ECoG) is an important neuroscientific tool for acquiring information about brain states and mesoscopic neural activity. Additionally, the use of ECoG and the higher resolution technique micro-ECoG (μECoG) show promise in Brain-Machine Interface (BMI) applications for motor and speech prosthetics. Commercially available μECoG arrays made through photolithographic and vapor-deposition processes allow neuroscientists to incorporate μECoG into their studies, however, these electrode arrays can be expensive and do not lend themselves to easy reconfigurability for experiment-specific electrode layouts. Here we show a process for patterning μECoG electrode arrays using inkjet printing on a 50 μm thick PET substrate. With inkjet printing, we achieve electrode active areas with 300 μm diameters and interconnects with a 500 μm pitch. These electrode arrays demonstrate an average impedance of 2.5 kΩ at 100 Hz and were used to record local field potentials from the mouse somatosensory cortex with signal-to-noise ratios between 30-45 dB. Our results demonstrate the feasibility of using inkjet-patterned μECoG electrode arrays in future neuroscientific studies. Furthermore, we expect printed μECoG arrays to be compatible with roll-to-roll processing for high-throughput and low-cost manufacturing, decreasing the cost-barrier for neuroscientists seeking to incorporate customizable μECoG electrode arrays into their experimental design.

Original languageEnglish (US)
Title of host publication9th International IEEE EMBS Conference on Neural Engineering, NER 2019
PublisherIEEE Computer Society
Pages774-777
Number of pages4
ISBN (Electronic)9781538679210
DOIs
StatePublished - May 16 2019
Event9th International IEEE EMBS Conference on Neural Engineering, NER 2019 - San Francisco, United States
Duration: Mar 20 2019Mar 23 2019

Publication series

NameInternational IEEE/EMBS Conference on Neural Engineering, NER
Volume2019-March
ISSN (Print)1948-3546
ISSN (Electronic)1948-3554

Conference

Conference9th International IEEE EMBS Conference on Neural Engineering, NER 2019
CountryUnited States
CitySan Francisco
Period3/20/193/23/19

How much support was provided by MRSEC?

  • Shared

Reporting period for MRSEC

  • Period 6

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  • Projects

    University of Minnesota MRSEC (DMR-1420013)

    Lodge, T. P.

    11/1/1410/31/20

    Project: Research project

    MRSEC SEED Projects

    11/1/14 → …

    Project: Research project

    Cite this

    Donaldson, P. D., Ghanbari, L., Rynes, M. L., Bangalore Kodandaramaiah, S., & Swisher, S. L. (2019). Inkjet-Printed Silver Electrode Array for in-vivo Electrocorticography. In 9th International IEEE EMBS Conference on Neural Engineering, NER 2019 (pp. 774-777). [8717083] (International IEEE/EMBS Conference on Neural Engineering, NER; Vol. 2019-March). IEEE Computer Society. https://doi.org/10.1109/NER.2019.8717083