| 초록 |
Stretchable printed circuit board (PCB), which is essential components of next-generation electronic devices, should be highly stretchable even at high levels of integration, as well as durable under repetitive stretching, and patternable. Herein, an island-structured stretchable PCB composed of materials with controlled Young's modulus and viscosity by adding a reinforcing agent or controlling the degree of crosslinking is reported. Each material was fabricated with the most effective structures through a 3D printer. The PCB was able to stretch 71.3% even when highly integrated and was patterned so that various componiets could be mounted. When fully integrated, the stress applied to the mounted components was reduced by 99.9% even when stretched by over 70%. Consequently, a 4x4 array of capacitance sensors in a stretchable keypad demonstration using our PCB was shown to work, even at 50% stretching of the PCB. |
