Self-Closed Parylene Cuff Electrode for Peripheral Nerve Recording


We tend to have designed, fabricated, and characterised a self-closed parylene cuff electrode for peripheral nerve recording, whose curliness and closeness is realized by the difference in self-stress of various parylene layers due to the heat treatments. Compared with the traditional cuff electrodes, the self-closed structure while not any further mechanical locking structure minimizes the mechanical structure of the cuff electrode. Moreover, the self-closed structure made of thin and versatile parylene film minimizes mechanical injury to the nerve and the encompassing tissues. The zero insertion force interface facilitates the connection of 16 channels with external circuits through the integrated parylene bonding pads. To cut back the impedance and increase the charge storage capacity of the electrode, the electrodeposited iridium oxide film is electrodeposited on the electrode sites. Using the fabricated self-closed parylene cuff electrode, acute neural recoding of 16 channels was performed on the rat sciatic nerve to verify the capability of recording the neural activities. This self-closed parylene cuff electrode is promising for use as an neural interface for peripheral nerve recording.

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