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CMOS-based smart-electrode-type retinal stimulator with bullet-shaped bulk Pt electrodes.

T Tokuda1, T Ito, T Kitao

  • 1Graduate School of MateriL Science, Nara Institute of Science and Technology, Ikoma, Nara, Japan. okuda@ms.naist.jp

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|January 19, 2012
PubMed
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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.

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  • 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.