Fabrication and electrical characterization of multi-layer capacitive touch sensors on flexible substrates by additive e-jet printing
Fabrication and electrical characterization of multi-layer capacitive touch sensors on flexible substrates by additive e-jet printing
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DOI：
10.1016/j.jmapro.2017.04.015
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发表时间：
2017-08
影响因子：
6.2
通讯作者：
H. Qin;Jingyan Dong;Yuan-Shin Lee
中科院分区：
文献类型：
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作者：
H. Qin;Jingyan Dong;Yuan-Shin Lee
目前的消费电子产品，特别是触摸显示器和柔性电子产品，受到现有商业透明导体材料的性能限制，这些材料被用作平板显示器和电容式触摸传感器的电极。本文提出了一种利用银纳米墨水替代氧化铟锡（ITO）用于柔性电子器件的高分辨率电极阵列快速成型的替代制造技术。采用在柔性衬底上直接印刷纳米银的方法，在聚对苯二甲酸乙二醇酯（PET）薄膜上制备了电容式触摸传感器。通过实验研究了高分辨率触摸传感器电极电流体动力喷墨打印的可行性。研究了亚20 μm电容传感器阵列在液滴和湿度检测中的灵敏度。快速原型方法对同时实现(1)定制和柔性触摸传感器，(2)成本效益制造以及(3)高分辨率和良好灵敏度具有重要影响。所提出的技术可用于柔性和可穿戴电子产品的定制导电模式的按需制造。
Current consumer electronics, in particular touch displays and flexible electronics, were limited by the properties of existing commercial transparent conductor materials used as electrodes both in flat panel display and capacitive touch sensors. In this paper, an alternative fabrication technique using silver nanoink that can be used for rapid prototyping of high-resolution electrode arrays to replace indium tin oxide (ITO) for flexible electronics was presented. By direct printing silver nanoparticles on flexible substrates, capacitive touch sensors were fabricated onto polyethylene terephthalate (PET) film. Experiments were conducted to study the feasibility of electrohydrodynamic inkjet printing (e-jet printing) of high-resolution electrodes for touch sensors. Sensitivity of sub-20 μm capacitance sensor array was investigated in the study for droplet and humidity detection applications. The rapid prototyping method makes a significant impact in enabling simultaneously (1) customized and flexible touch sensors, (2) cost-effective manufacturing, and (3) high resolution and good sensitivity. The presented techniques can be used for the on-demand fabrication of customized conductive patterns for flexible and wearable electronics.