基于液态金属直写的柔性电子打印研究

发布时间：2018-04-27 19:43

本文选题：柔性电子 + 液态金属　；参考：《浙江大学》2017年硕士论文

【摘要】：柔性电子是将电子器件制作在柔性基板上的新兴电子技术,具有可弯曲、拉伸、轻量化等优点,近年来发展迅速。但现有的柔性电子制造技术从导电功能材料的制备到柔性电子的制作工艺,以及产品的后续处理等过程较为复杂,时间成本、设备成本和原料成本较高。镓铟合金等液态金属在室温下呈液态、流动性好、电导率高、成本低,是较为理想的柔性电子制造技术功能材料。采用直写液态金属方法进行柔性电子产品的制造,便捷高效,对设备要求低,柔性强,具有广阔的应用前景。本论文提出了一种基于液态金属直写的柔性电子打印方法,实现柔性基底的液态金属直写打印及封装。本论文的主要研究内容如下:1、研究了液态金属材料的氧化性质,选定适合液态金属直写的基底材料,探究了其与液态金属的润湿性及粘附机理。通过打印硅胶对液态金属进行封装,便于柔性液态金属产品的应用和保存。2、搭建了液态金属直写设备。优化了三轴运动设备的稳定度和运动精度,设计了液态金属与硅胶的挤出系统,采用带行星减速器的步进电机系统精确控制滚珠丝杠的位移来保证材料挤出量的精确性,并构建双喷头打印封装系统,减少产品加工设备。3、探究了液态金属的直写工艺,探究了针头的种类、针头的内径、喷头运动速度和平台高度等运动参数对液态金属直写效果的影响,选定最佳打印方案。对硅胶的打印参数进行了研究,使其在打印过程中能够完好地密封液态金属直写线路。4、研究了柔性电子直写技术的系列应用。实现了液态金属直写技术在RFID射频识别标签、柔性天线等电子元件制造上的应用。制作了柔型电路,提出柔性PCB的直写方法。探究了本方法在可穿戴设备上的应用。
[Abstract]:Flexible electron is a new electronic technology which fabricates electronic devices on flexible substrate. It has the advantages of bending, stretching, lightweight and so on. It has developed rapidly in recent years. However, the existing flexible electronic manufacturing technology is more complex from the preparation of conductive functional materials to the fabrication process of flexible electronics, and the follow-up treatment of products. The cost of time, equipment and raw materials is high. Liquid metals such as gallium and indium alloys are liquid at room temperature, with good fluidity, high conductivity and low cost, so they are ideal functional materials for flexible electronic manufacturing technology. It is convenient and efficient to use direct writing liquid metal method to manufacture flexible electronic products. In this paper, a flexible electronic printing method based on liquid metal direct writing is proposed to realize liquid metal direct writing printing and packaging on flexible substrate. The main contents of this thesis are as follows: 1. The oxidation properties of liquid metal materials are studied. The substrate materials suitable for direct writing of liquid metals are selected and the wettability and adhesion mechanism between them and liquid metals are investigated. The liquid metal is encapsulated by printing silica gel, which is convenient for the application and preservation of flexible liquid metal products, and the liquid metal direct writing equipment is built. The stability and precision of triaxial motion equipment are optimized, and the extrusion system of liquid metal and silica gel is designed. The displacement of ball screw is precisely controlled by step motor system with planetary reducer to ensure the accuracy of material extrusion quantity. And build a double nozzle printing and packaging system, reduce the product processing equipment. 3, explore the direct writing technology of liquid metal, probe into the type of needle, the inner diameter of needle, The effect of motion parameters such as velocity of nozzle and height of platform on the direct writing effect of liquid metal was selected and the best printing scheme was selected. The printing parameters of silica gel are studied so that it can seal the liquid metal direct writing circuit. 4. The application of flexible electronic direct writing technology is studied. The liquid metal direct writing technology is applied to the manufacture of RFID RFID tags, flexible antennas and other electronic components. A flexible circuit is made and a direct writing method for flexible PCB is proposed. The application of this method in wearable devices is explored.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN605

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