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Polymer-based interconnection cables to integrate with flexible penetrating microelectrode arrays
- Polymer-based interconnection cables to integrate with flexible penetrating microelectrode arrays
- Oh, Keonghwan; Byun, Donghak; Kim, Sohee
- DGIST Authors
- Kim, Sohee
- Issue Date
- Biomedical Microdevices, 19(4)
- Article Type
- Cables; Durability; Electrochemical Impedance Spectroscopy (EIS); Electrochemical Phenomena; Electrodes; Equivalent Circuit Model; Equivalent Circuits; Flat Cables; Flexible Penetrating Microelectrode Array (FPMA); Integrated Circuit Interconnects; Interconnection Cable; Interconnection Method; Microelectrode Array; Microelectrodes; Neural Interface; Neural Interfaces; Neural Signal Recording; Parylene C; Phosphate Buffered Saline Solutions; Polyimide; Polyimides; Polymeric Implants; Wire
- There have been various types of interconnection methods for neural interfacing electrodes, such as silicon ribbon cables, wire bonding and polymer-based cables. In this study, interconnection cables were developed for integration with a Flexible Penetrating Microelectrode Array (FPMA) that was previously developed for neural signal recording or stimulation. Polyimide and parylene C were selected as base materials for the interconnection cables as both materials can preserve the flexibility of the FPMA better than other interconnection methods such as silicon ribbon cable or wire bonding. We conducted durability tests to determine if the interconnection cables were suitable for in-vivo implantation, by long-term soaking of the cables in phosphate buffered saline solution. We measured the changes in impedance over time, and equivalent circuit models were used to analyze the electrochemical phenomena on the surface of the cables. Lastly, we implanted the cable-integrated electrodes device onto rabbit’s sciatic nerve and recorded neural signals to prove the feasibility of the developed FPMA integration system. © 2017, Springer Science+Business Media, LLC.
- Springer New York LLC
- Related Researcher
Kim, So Hee
Neural Interfaces & MicroSystems Lab
Neural interface; Neural stimulation; Bio MEMS; Stretchable electronics; Numerical simulation of implant-body interactions
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