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BPN771: Silicon Carbide ECoGs for Chronic Implants in Brain-Machine Interfaces

Project ID BPN771
Start Date Wed 2014-Aug-13 14:31:09
Last Updated Mon 2015-Feb-02 10:18:42
Abstract Electrocorticography (ECoG) is an excellent brain mapping technique that places large arrays of electrodes directly on the cortex of the brain, and has been used in patients for several decades. Utilization of this technique results in an improved trade-off between spatial and temporal resolution. In recent years, the development of high-density, polymer-based micro- ECoGs has pushed the field even further, allowing even better neural circuit observation in acute recordings. Despite these advances, an unsolved challenge remains in terms of device longevity. Polymer-based micro-ECoGs are not suitable for chronic implantation within brain tissue, the interfacial layers within the device allow molecule penetration causing delamination, which overtime leads to device failure. However, silicon carbide (SiC)-based micro ECoGs are expected to enhance device structural and chemical stability, and thus lengthen the device lifetime compared to polymer-based micro- ECoGs. SiC is a biocompatible that can provide micro-ECoGs with the mechanical and chemical stability they are currently lacking within the reactive or harsh-environment of the body. Our goal is to design SiC- based micro-ECoG arrays that can serve as effective, robust chronic implants.
Status Continuing
Funding Source BSAC Member Fees
IAB Research Area BioMEMS
Researcher(s) Camilo A. Diaz-Botia, Lunet E. Luna
Advisor(s) Michel M. Maharbiz, Roya Maboudian
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