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CMOS-based smart-electrode-type retinal stimulator with bullet-shaped bulk Pt electrodes
1Graduate School of MateriL Science, Nara Institute of Science and Technology, Ikoma, Nara, Japan. okuda@ms.naist.jp
Summary
Researchers developed a flexible retinal stimulator using CMOS technology and novel packaging with bulk platinum electrodes. In vivo trials confirmed its functionality for retinal stimulation in rabbits.
Area of Science:
- Biomedical Engineering
- Neuroscience
- Materials Science
Background:
- Developing advanced visual prosthetics is crucial for restoring sight.
- Current retinal stimulators face challenges in flexibility, electrode design, and integration.
Purpose of the Study:
- To fabricate and demonstrate a novel CMOS-based flexible retinal stimulator.
- To integrate on-chip stimulation modes and monitoring functions.
- To develop a new packaging process for enhanced device performance.
Main Methods:
- Fabrication of a CMOS unit chip with integrated stimulator and monitoring.
- Design and implementation of single- and multi-site stimulation modes.
- Development of a new flexible structure and packaging with bullet-shaped bulk platinum electrodes.
- In vivo testing of the retinal stimulator on rabbit retinas.
Main Results:
- Successful fabrication and demonstration of the flexible retinal stimulator.
- Confirmation of retinal stimulation functionality through in vivo trials.
- Validation of the novel structure, packaging, and electrode design.
Conclusions:
- The developed CMOS-based flexible retinal stimulator shows promise for visual prosthetics.
- The novel packaging and electrode design contribute to improved device performance.
- In vivo results support the potential of this technology for retinal stimulation applications.
