Waterproof, Omnidirectionally Stretchable Electronics with Multilayer Patterns Via Rapid, Photolithography-Free Fabrication

We report for the first time that stretchable electronics systems with complex geometric constructs and multiple layers of patterns can be fabricated rapidly without the need of photolithography steps. Instead, a desktop-size vinyl cutter and a CO2 laser cutter are used as patterning tools in our proposed process. To demonstrate the capacity of our method, we fabricate within 50 minutes per device a waterproof, omnidirectionally stretchable micro-supercapacitor patch with four stacked constituent layers, each with a different pattern. This soft, compliant patch can maintain full electrochemical performances after >16 hours of immersion in water, and/or various types of extreme folding and stretching deformations.