Choi Jungrak, Han Chankyu, Cho Seokjoo, Kim Kyuyoung, Ahn Junseong, Del Orbe Dionisio, Cho Incheol, Zhao Zhi-Jun, Oh Yong Suk, Hong Hyunsoo, Kim Seong Su, Park Inkyu
Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, South Korea.
Department of Nano Manufacturing Technology, Korea Institute of Machinery and Materials (KIMM),156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, South Korea.
Sci Adv. 2021 Oct 15;7(42):eabj0694. doi: 10.1126/sciadv.abj0694. Epub 2021 Oct 13.
Recently, three-dimensional electronics (3DE) is attracting huge interest owing to the increasing demands for seamless integration of electronic systems on 3D curvilinear surfaces. However, it is still challenging to fabricate 3DE with high customizability, conformability, and stretchability. Here, we present a fabrication method of 3DE based on predistorted pattern generation and thermoforming. Through this method, custom-designed 3DE is fabricated through the thermoforming process. The fabricated 3DE has high 3D conformability because the thermoforming process enables the complete replication of both the overall shape and the surface texture of the 3D mold. Furthermore, the usage of thermoplastic elastomer and a liquid metal–based conductive electrode allows for high thermoformability during the device fabrication as well as high stretchability during the device operation. We believe that this technology can enable a wide range of new functionalities and multiscale 3D morphologies in wearable electronics.
近年来，由于对电子系统在三维曲面上无缝集成的需求不断增加，三维电子学（3DE）引起了极大的关注。然而，制造具有高定制性、贴合性和可拉伸性的3DE仍然具有挑战性。在此，我们提出一种基于预失真图案生成和热成型的3DE制造方法。通过这种方法，通过热成型工艺制造定制设计的3DE。所制造的3DE具有高的三维贴合性，因为热成型工艺能够完全复制三维模具的整体形状和表面纹理。此外，热塑性弹性体和基于液态金属的导电电极的使用使得在器件制造过程中具有高的热成型性，以及在器件运行过程中具有高的可拉伸性。我们相信，这项技术能够在可穿戴电子设备中实现广泛的新功能和多尺度三维形态。
