In vitro assessment of long-term reliability of low-cost μECoG arrays.

Conference Paper

Micro-electrocorticographic (μECοG) electrode arrays provide a minimally invasive, high-resolution neural interface with broad cortical coverage. Previously, we fabricated μECoG arrays at a lower cost than commercially available devices using low-cost industrial processes [1], [2]. Here, we report the in vitro electrical performance of five μECoG designs undergoing an accelerated aging protocol. The impedance and yield of the μECoG arrays were tracked over time. The equivalent lifetime at 37°C depended on the manufacturer and material stack-up, and ranged between 30 and greater than 760 days (ongoing). The main failure modes of these devices were delamination at the site of the electrode contact and broken traces due to metal dissolution. Based on these in vitro results, we offer several recommendations for μECoG designs suitable for chronic implantation.

Full Text

Duke Authors

Cited Authors

  • Palopoli-Trojani, K; Woods, V; Chia-Han Chiang, ; Trumpis, M; Viventi, J

Published Date

  • August 2016

Published In

Volume / Issue

  • 2016 /

Start / End Page

  • 4503 - 4506

PubMed ID

  • 28269278

International Standard Serial Number (ISSN)

  • 1557-170X

Digital Object Identifier (DOI)

  • 10.1109/embc.2016.7591728