Researchers from Carnegie Mellon University’s College of Engineering and the Institute of Systems and Robotics at the University of Coimbra, Portugal, have developed a simple, efficient method to make robust, highly flexible, tattoo-like circuits for use in wearable computing.
The low-cost process adds a trace of an electrically conductive, liquid metal alloy to tattoo paper that adheres to human skin. These ultrathin tattoos can be applied easily with water, the same way one would apply a child’s decorative tattoo with a damp sponge.
Other tattoo-like electronics either require complex fabrication techniques inside a cleanroom or lack the material required for stretchable digital circuit functionality on skin.
MIT also had developed in the past a more artistic temp tattoos