Rapid cleanroom-free fabrication of thread based transistors using three-dimensional stencil-based patterning
Rapid cleanroom-free fabrication of thread based transistors using three-dimensional stencil-based patterning
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DOI：
10.1088/2058-8585/abe459
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发表时间：
2021-02
影响因子：
3.1
通讯作者：
T. Kumar;Rachel Owyeung;S. Sonkusale
中科院分区：
文献类型：
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作者：
T. Kumar;Rachel Owyeung;S. Sonkusale
诸如可穿戴电子设备和柔性显示器的应用已经导致柔性电子材料的相当大的进步。纺织线最近已成为具有独特性能的柔性基材，如生物相容性、三维（3D）界面和可加工性。然而，在螺纹上制造晶体管和集成电路仍然是一个挑战。我们解决这个问题需要一个低成本，高通量和无洁净室的离子凝胶栅有机线为基础的晶体管的制造方法。它利用3D灵活的“模板”来制造有源沟道区间隙。类似于在二维基板上的丝网印刷中使用的模板，模板提供了用于在线基基板上进行空间定向印刷的3D掩模。碳墨水使用该3D模板涂覆在线上以充当源极和漏极，沿着与聚（3-己基噻吩）一起，聚（3-己基噻吩）是一种经过验证的有机半导体作为概念验证。我们实现了数十个晶体管的一致同时批量制造，阈值电压为−（1.48 ± 0.11）V，工作范围为0至−3 V，ON/OFF比为102。
Applications such as wearable electronics and flexible displays have led to considerable advancement in flexible electronic materials. Textile threads have recently emerged as a flexible substrate with unique properties like biocompatibility, three-dimensional (3D) interfacing, and processability. However, fabrication of transistors and integrated circuits on threads remains a challenge. We address this need with a low-cost, high-throughput and cleanroom-free fabrication method for ionogel-gated organic thread-based transistors. It makes use of a 3D flexible ‘stencil’ to fabricate the active channel area gap. Similar to stencils used in screen printing on two-dimensional substrates, the stencil provides a 3D mask for spatially targeted printing on thread-based substrates. Carbon ink is coated using this 3D stencil on the thread to act as source and drain electrodes, along with poly(3-hexylthiophene), a proven organic semiconductor as a proof of concept. We achieve consistent simultaneous batch fabrication of over tens of transistors with a threshold voltage of − (1.48 ± 0.11) V, an operating region of 0 to −3 V, and an ON/OFF ratio of the order of 102.