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Conf Proc IEEE Eng Med Biol Soc. 2012;2012:5999-6002. doi: 10.1109/EMBC.2012.6347361.

Polymer neural interface with dual-sided electrodes for neural stimulation and recording.

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  • 1Lawrence Livermore National Laboratory, Livermore, CA 94550, USA. tooker1@llnl.gov

Abstract

We present here a demonstration of a dual-sided, 4-layer metal, polyimide-based electrode array suitable for neural stimulation and recording. The fabrication process outlined here utilizes simple polymer and metal deposition and etching steps, with no potentially harmful backside etches or long exposures to extremely toxic chemicals. These polyimide-based electrode arrays have been tested to ensure they are fully biocompatible and suitable for long-term implantation; their flexibility minimizes the injury and glial scarring that can occur at the implantation site. The creation of dual-side electrode arrays with more than two layers of trace metal enables the fabrication of neural probes with more electrodes without a significant increase in probe size. This allows for more stimulation/recording sites without inducing additional injury and glial scarring.

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