A CMOS LSI-Based Flexible Retinal Stimulator for Retinal Prosthesis

Abstract

A CMOS LSI-based neural stimulator was developed for retinal prosthesis. The stimulator was designed with “multi-chip” architecture. Small LSI neural stimulators named “Unit Chip” were assembled on a flexible substrate into a flexible, multi-site retinal stimulator. An experimental system equipped with the fabricated LSI-based flexible stimulator was configured and current injection functionality was demonstrated in saline solution. Materials for improved charge injection were also discussed.