Journal article

Ultrananocrystalline diamond-CMOS device integration route for high acuity retinal prostheses

A Ahnood, MC Escudie, R Cicione, CD Abeyrathne, K Ganesan, KE Fox, DJ Garrett, A Stacey, NV Apollo, SG Lichter, CDL Thomas, N Tran, H Meffin, S Prawer

BIOMEDICAL MICRODEVICES | SPRINGER | Published : 2015

Abstract

High density electrodes are a new frontier for biomedical implants. Increasing the density and the number of electrodes used for the stimulation of retinal ganglion cells is one possible strategy for enhancing the quality of vision experienced by patients using retinal prostheses. The present work presents an integration strategy for a diamond based, high density, stimulating electrode array with a purpose built application specific integrated circuit (ASIC). The strategy is centered on flip-chip bonding of indium bumps to create high count and density vertical interconnects between the stimulator ASIC and an array of diamond neural stimulating electrodes. The use of polydimethylsiloxane (PD..

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Funding Acknowledgements

This research was supported by the ARC through its Special Research Initiative (SRI) in Bionic Vision Science and Technology grant to Bionic Vision Australia (BVA). This work was performed in part at the NSW Node of the Australian National Fabrication Facility. NVA is supported by an MMI-CSIRO PhD scholarship.