Flexible heterogeneously integrated low form factor wireless multi-channel surface electromyography (sEMG) device

A elegant extremely flexible Fan-Out Wafer-Level Packaging (FOWLP) based fully integrated bipolar multi-channel (up to 12 channels) surface electromyography (sEMG) device and assembly is demonstrated for intraoperative neurological monitoring (IONM) for complex spine surgeries and post-op physiological monitoring. It includes twenty gold-capped vertically corrugated flexible dry copper electrodes, Bluetooth wireless data transfer, a multichannel sEMG data acquisition and processing dielet, rechargeable energy storage and an ergonomic reusable adhesive for ease of use. This completely biocompatible and wearable system is highly flexible, thin (1 mm), light weight (< 5 g) and can be used to monitor neuro-muscular activations for IONM as well as for general physiological monitoring.