Multilayer Stretchable Conductors with a Large Tensile Strength

A metallic conductor layer on an elastomeric substrate has a limited stretchability. Application of a conductive rubber layer underneath the metal can enhance the flexibility and preserve the electrical connection even at high strains. Silicone and polydimethyl siloxane (PDMS) have been tested as elastic substrates. A repeatable resistance-strain behavior up to 100% strain is achieved for a multilayer conductor with PDMS substrate. It is found that this type of substrate has a large influence on the size of cracks on the metal layer.