Advanced polymer-based microfabricated neural probes using biologically driven designs.
- References {1109}
- Thermal noise from 280 um^2 or 170 um^2 gold recording sites much higher than PEDOT coated sites.
- Used an interdigitated contact-free probe for measuring insulation impedance change. Very smart!
- Water molecules will diffuse 15 um / minute in parylene (Yasuda, Yu et. al 2010).
- In the frequency range critical for neural recording and stimulation, 500-5k, impedance moculus decline was small.
- 1 hr soak at 60C.
- Chapter 3 details 60-day soak of Parylene-C + reactive parylene insulation performance testing.
- Regular parylene seems to work perfectly fine, no better than the PPX heat-treated devices.
- Heat treatment does improve quality -- 200C in a vacuum oven for 2 days. (Li, Rodger et al 2005)
- However -- this increases the brittleness.
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