title: A hybrid PDMS-Parylene subdural multi-electrode array.
abstract: In this paper, we report on a cost effective and simple method for fabricating a flexible multi-electrode array for subdural neural recording. The electrode was fabricated using a PDMS-Parylene bilayer to combine the major advantages of both materials. Mechanical and electrical characterizations were performed to confirm functionality of a 16-site electrode array under various flexed/bent conditions. The electrode array was helically wound around a 3 mm diameter cylindrical tube and laid over a 2 cm diameter sphere while maintaining its recording capability. Experimental results showed impedance values between 300 kΩ and 600 kΩ at 1 kHz for 90 μm diameter gold recording sites. Acoustically evoked neural activity was successfully recorded from rat auditory cortex, confirming in vivo functionality.
authors: School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA. ochoam@purdue.edu
authors: Manuel
authors: M
authors: Ochoa
authors: Pinghung
authors: P
authors: Wei
authors: Andrew J
authors: AJ
authors: Wolley
authors: Kevin J
authors: KJ
authors: Otto
authors: Babak
authors: B
authors: Ziaie
mesh_terms: D000818:Animals; D004129:Dimethylpolysiloxanes / Q000737:chemistry*; D004560:Electricity; D055724:Electrophysiological Phenomena; D055595:Mechanical Phenomena; D008839:Microelectrodes; D055616:Microtechnology / Q000295:instrumentation*; D011108:Polymers / Q000737:chemistry*; D051381:Rats; D013355:Subdural Space; D014992:Xylenes / Q000737:chemistry*
chemical_list: D004129:Dimethylpolysiloxanes; D011108:Polymers; D014992:Xylenes; C011055:parylene; C013830:baysilon