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Fabrication of Microelectrodes on Microchip Sidewalls for Injectable Biomedical Devices.

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    Summary
    This summary is machine-generated.

    This study presents a new method for creating smaller implantable medical devices (IMDs) by fabricating electrodes on chip sidewalls. This technique utilizes plasma-focused ion beams for precise electrode creation, improving miniaturization for neural monitoring.

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    Area of Science:

    • Biomedical Engineering
    • Materials Science
    • Neuroscience

    Background:

    • Implantable Medical Devices (IMDs) are crucial for neural modulation and brain activity monitoring.
    • Current IMDs face miniaturization challenges due to off-chip components and complex assembly, impacting size and reliability.
    • Advanced CMOS technology offers potential for smaller, battery-free IMDs.

    Purpose of the Study:

    • To introduce a novel integration technique for miniaturized IMDs.
    • To reduce the overall volume and improve the reliability of implantable neural devices.
    • To demonstrate precise microelectrode fabrication on encapsulated CMOS chips.

    Main Methods:

    • Fabrication of microelectrodes on the sidewalls of encapsulated CMOS chips.
    • Utilization of plasma-focused ion beam (PFIB) for precise electrode manufacturing.
    • Integration of CMOS technology with novel electrode placement for miniaturization.

    Main Results:

    • Significant reduction in implant size achieved through sidewall electrode integration.
    • Demonstrated feasibility of precise and efficient microelectrode fabrication using PFIB.
    • Enabled potential for smaller, more reliable, and battery-free IMDs.

    Conclusions:

    • The novel integration technique successfully reduces IMD size.
    • PFIB enables precise microelectrode fabrication for advanced IMD designs.
    • This approach paves the way for next-generation miniaturized neural monitoring and modulation devices.