High-Conductive Stretchable Electrode Array Patch for Real-Time High-Fidelity Electromyography Monitoring

Reliable acquisition of surface electromyography (sEMG) signals requires stretchable electrode arrays with high conductivity, robust mechanics, and low crosstalk, but such a combination has not yet been achieved in existing systems. Here, we present a multilayer stretchable microelectrode array patch (MEAP-S) that integrates photolithographically patterned gold microelectrodes with an ultrathin SEBS dielectric layer. MEAP-S achieves high conductivity (> 10⁵ S m^{- 1}), stretchability up to 100%, and densities of 100 channels cm^{- 2}, while effectively suppressing inter-channel interference. The device delivers stable, noise-robust performance with signal-to-noise ratios above 27 dB under strain and during long-term wear. Human studies demonstrate superior comfort and biocompatibility compared with Ag/AgCl electrodes, along with accurate decoding of complex hand gestures from high-density sEMG maps. These results establish MEAP-S as a scalable and versatile platform for next-generation neuromuscular interfaces, continuous health monitoring, and human-machine interaction.