Juhee Kim1,2,Wonseop Hwang3,Hyunjung Yi1,In-Suk Choi2
Korea Institute of Science and Technology1,Seoul National University2,Hanyang University3
Juhee Kim1,2,Wonseop Hwang3,Hyunjung Yi1,In-Suk Choi2
Korea Institute of Science and Technology1,Seoul National University2,Hanyang University3
In this presentation, we introduce a skin-compatible meta-structured e-skin patch that only consists of commercial adhesive dressing and FPCB for continuously collecting electrocardiographic signals over five days. In terms of long-term monitoring, it is crucial for the on-skin sensors to stably monitor bio-signals without any skin discomfort. Our approach presents a practical and cost-effective way to manufacture a skin-compatible wearable sensor system, making use of conventional materials that were difficult to include due to their high elastic modulus.<br/>To rationally design the metal structural pattern of a stretchable sensor patch suitable for skin movement, we measured and analyzed the deformation field around the chest by using digital image correlation method and finite element simulation. Among many possible patterns, we chose the Kagome-based structure for the adhesive dressing that can well accommodate the deformation of the skin as well as give breathability to the patch due to its high porosity. We further devise a tethering scheme of attaching the FPCB to the adhesive dressing. The results showed that our sensor patch system greatly improved skin comfort and was able to monitor ECG signals for five days without any discomfort.