SkinLink: On-body Construction and Prototyping of Reconfigurable Epidermal Interfaces

Recent advances in epidermal interfaces have enabled applications in biometric sensing, medical monitoring, and expressive interactions. While these systems demonstrate technical potential, their design and fabrication often rely on cleanrooms, photolithography, sputtering, or chemical etching - resources from microfabrication labs. As a result, the construction times of a single on-skin interface can take 3.5 to 11 hours [4, 5, 9], making tailor-made circuitry for individual bodies impractical for early-stage prototyping and iteration. Creating customized on-skin interfaces often involves designing precise layouts, routing conductive traces, and assembling components off-body before application. Yet the body's soft, nonplanar surface makes small layout changes difficult to accommodate or require full reconstruction [5, 6]. Repeated modifications further challenge skin conformability and long-term wearability [7, 8].