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An Inkjet Printed Flexible Electrocorticography (ECoG) Microelectrode Array on a Thin Parylene-C Film
Journal article   Open access   Peer reviewed

An Inkjet Printed Flexible Electrocorticography (ECoG) Microelectrode Array on a Thin Parylene-C Film

Yoontae Kim, Stella Alimperti, Paul Choi and Moses Noh
Sensors (Basel, Switzerland), v 22(3), p1277
08 Feb 2022
DOI: https://doi.org/10.3390/s22031277
PMID: 35162023
url
https://doi.org/10.3390/s22031277View
Published, Version of Record (VoR)CC BY V4.0,  Open

Abstract

Animals Electrocorticography Microelectrodes Polymers Rats Xylenes
Electrocorticography (ECoG) is a conventional, invasive technique for recording brain signals from the cortical surface using an array of electrodes. In this study, we developed a highly flexible 22-channel ECoG microelectrode array on a thin Parylene film using novel fabrication techniques. Narrow (<40 µm) and thin (<500 nm) microelectrode patterns were first printed on PDMS, then the patterns were transferred onto Parylene films via vapor deposition and peeling. A custom-designed, 3D-printed connector was built and assembled with the Parylene-based flexible ECoG microelectrode array without soldering. The impedance of the assembled ECoG electrode array was measured in vitro by electrochemical impedance spectroscopy, and the result was consistent. In addition, we conducted in vivo studies by implanting the flexible ECoG sensor in a rat and successfully recording brain signals.

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13 citations in Web of Science
14 citations in Scopus

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Collaboration types
Domestic collaboration
Web of Science research areas
Chemistry, Analytical
Engineering, Electrical & Electronic
Instruments & Instrumentation
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