Conformal Micropatterned Organic-Metal Electrodes for Physiological Recording

Conformal electrodes provide a soft and conforming interface with the skin for reduced impedance, comfortable skin contact, and improved signal quality compared to commercial electrodes. In this paper, we present conformal micropatterned organic-metal (CMOM) electrodes and our investigation on the effect of perforation micropatterning and PEDOT:PSS coating. CMOM electrodes were characterized then evaluated in vivo against commercial-off-the-shelf electrodes. PEDOT:PSS was found to reduce the overall impedance in each electrode variant, resulting in a >97% decrease in impedance at low frequencies. The change in impedance at high frequencies was not significant for the control or
$30\ \mu \mathrm{m}$
vias electrodes, but the impedance was significantly greater following EPD for
$60\ \mu \mathrm{m}$
vias electrodes.