Stretchable and flexible electronics with elastic interconnects is critical for electronics to be compatible with wearable applications. Especially fabricating such interconnects with printing technology promises rapid, low-cost, and mass manufacturing. Here, a novel direct-write manufacturing process is presented for a stretchable conductor using an extrusion printer and a micron size silver flake ink as the conductive material without expensive nanomaterials. Conductivity increases as the sintering temperature is increased but at the cost of limited stretchability. To overcome this trade-off, we place one mildly sintered line on top of a fully sintered line to create a hybrid serpentine feature. These two lines of a hybrid feature have two different stretchability-conductivity profiles, synergistically improving both the stretchability and conductivity. With this method, a maximum stretchability of 120% strain is obtained with a minimal change in resistance by a factor of 2.8....

中文翻译：

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直接书写可拉伸金属片状导体：通过结合不同的烧结材料，改善可拉伸性和导电性

具有弹性互连的可伸缩柔性电子设备对于使电子设备与可穿戴应用程序兼容至关重要。特别是用印刷技术制造这种互连件有望实现快速，低成本和批量生产。在这里，提出了一种新颖的直接写入制造工艺，该工艺使用挤压打印机和微米尺寸的片状银墨作为导电材料，而无需昂贵的纳米材料，从而用于可拉伸导体。电导率随着烧结温度的增加而增加，但是以有限的拉伸性为代价。为了克服这种折衷，我们将一条轻度烧结的线放置在完全烧结的线的顶部，以创建混合蛇形特征。这两条混合特征具有两个不同的拉伸性-导电性曲线，协同改善拉伸性和导电性。用这种方法，可以获得最大120％应变的可拉伸性，而阻力的最小变化仅为2.8...。