A stretchable printed circuit board (PCB), which is an essential component 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 components 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 4 × 4 array of capacitance sensors in a stretchable keypad demonstration using our PCB was shown to work, even at 50% stretching of the PCB.

中文翻译：

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高度集成的弹性岛状结构印刷电路板，具有可拉伸电子器件的受控杨氏模量。

作为下一代电子设备的重要组成部分的可拉伸印刷电路板（PCB），即使在高集成度下也应具有很高的可拉伸性，并且在重复拉伸和图案化下也应具有耐用性。本文中，报道了由通过添加增强剂或控制交联度来控制杨氏模量和粘度的材料组成的岛状可拉伸PCB。每种材料都是通过3D打印机以最有效的结构制成的。即使高度集成，PCB仍能够拉伸71.3％，并进行了图案化，因此可以安装各种组件。完全集成后，即使拉伸超过70％，施加在已安装组件上的应力也会降低99.9％。所以，