A Wireless Flexible Wearable Biopotential Acquisition System Utilizing Parylene Based Microneedle Array

In this paper, we proposed a flexible wearable patch integrating parylene-based microneedle array (MNA) and signal acquisition flexible PCB (FPC) circuit for long-term biopotential monitoring. The MNA can penetrate high-resistance stratum corneum to achieve low-impedance skin-electrode contact. Due to the flexibility of Parylene and polyimide (PI) substrate, the device can contact with soft and curved body surface compactly. Furthermore, the button battery, signal acquisition chip and Bluetooth transceiver were integrated and minimized to a small patch, leading to increased wearability. The system is expected to form a sensing net on the whole body to achieve multichannel biopotential monitoring.

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