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Related Experiment Video

Updated: Apr 18, 2026

Author Spotlight: Advancing Large-Scale Neural Dynamics Through HD-MEA Technology
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2.5D heterogeneously integrated microsystem for high-density neural sensing applications.

Po-Tsang Huang, Shang-Lin Wu, Yu-Chieh Huang

    IEEE Transactions on Biomedical Circuits and Systems
    |January 11, 2015
    PubMed
    Summary
    This summary is machine-generated.

    This study presents a miniaturized 2.5D bio-sensing microsystem for high-density neural sensing. The novel design achieves low power consumption for advanced brain function investigation.

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    Area of Science:

    • Neuroscience
    • Electrical Engineering
    • Materials Science

    Background:

    • Miniaturized neural sensing microsystems are essential for investigating brain function.
    • High-density neural signal acquisition requires advanced integration techniques.

    Purpose of the Study:

    • To present a 2.5D heterogeneously integrated bio-sensing microsystem with μ-probes and embedded through-silicon-via (TSVs).
    • To enable high-density neural sensing applications with reduced power consumption.

    Main Methods:

    • Fabrication of a 24 × 24 μ-probe array with embedded TSVs on a 5×5 mm² chip.
    • Heterogeneous integration of μ-probes, 4 dies (for signal acquisition, feature extraction, and classification), and a silicon interposer.
    • Utilizing low-power analog front-end circuits, efficient analog-to-digital converters, discrete wavelet transforms, filters, and a microcontroller (MCU).
    • Implementation of an on-interposer bus (μ-SPI) for data transfer.

    Main Results:

    • Successful fabrication and integration of the 2.5D bio-sensing microsystem.
    • Demonstration of 16-channel neural signal capture with high-density μ-probes.
    • Achieved a low overall power consumption of 676.3 μW for 16-channel neural sensing.
    • Successful in-vivo testing validating the microsystem's performance.

    Conclusions:

    • The proposed 2.5D heterogeneously integrated bio-sensing microsystem is effective for high-density neural sensing.
    • The microsystem offers a low-power solution for brain function investigation.
    • This technology holds promise for advancing neural interface applications.