Fig. 1.

Fabrication of noncoplanar stretchable electronics and responses to deformation. (A) Schematic overview of the fabrication process for representative circuits that accomplish high levels of stretchability through the use of noncoplanar mesh designs integrated with elastomeric substrates [for the case shown here, PDMS]. (B) SEM images of an array of CMOS inverters that result from this process, in an undeformed state (Lower; ≈20% prestrain) and in a corresponding configuration that results from a complex twisting motion (Upper). (C) Optical image of a freely deformed stretchable array of CMOS inverters, highlighting 3 different classes of deformation: diagonal stretching, twisting, and bending. The Insets provide SEM images for each case (colorized for ease of viewing).