Microspike Array Electrode with Flexible Backing for Biosignal Monitoring

Interest in continuous biosignal monitoring has increased in recent years with the increase in popularity of wearable devices and smartphones. The electrode is a key component for biosignal recordings, but conventional wet electrodes are not suitable as they require skin preparation and the application of a conductive gel. One proposed solution for this problem is the microspike or microneedle electrodes as they have the potential of acquire spontaneous small amplitude signals, but they require complex and expensive fabrication methods. The present work proposes a simple fabrication method and design of a dry microspike array electrode with flexible backing made of low-cost conductive polymers and demonstrates EEG and ECG recording.