柔性电子装置的热学和力学性能研究

发布时间：2019-06-17 07:54

【摘要】：柔性电子产业依赖的是一种将电子器件制作在柔性或可延展塑料或薄金属基板上的新兴电子技术,该类产品具备可弯曲、可延展、可控物理寿命等特征。相比之下,传统光刻技术具有难以实现大幅面、非平面、低温制造等问题,且有机材料兼容性差、制造成本高,不适应大面积柔性电子器件的制造要求。可注射式微型光电子器件是范畴的一个典型应用。μ-LEDs点阵结构在组织中的热特性非常重要,因为过度加热可能导致组织损害和不良反应。为了更好地理解该装置的操作和建立设计μ-LED的一般性准则,最大限度地减少热效应,本论文提出了用于脉冲模式操作的理论模型,并进行了有限元分析(FEA)和实验验证。本文不仅得到了μ-LED的最高温度理论解,也建立了影响最大温度变化的各个参数之间的简单比例关系,可用于优化器件的性能。高面积覆盖率超薄基体的可伸缩砷化镓光伏器件是该领域的另一应用。通过合理的力学设计和模型的有限元数值分析及理论分析论证的基础上,提出了岛桥结构基体结合超延伸性互连的结构以满足高达91%的面积覆盖率和440%的局部延伸率,实现光伏组件高能量采集和存储率。超薄基体可更好地集成到屋顶,甚至可穿戴设备上,满足民用和军用的不同需求。在保证系统可重复伸缩20%的前提条件下,本文设计的互连结构采用了一级蛇形结构,且沟槽处材料采用的Ecoflex仿生物皮肤材料,承受高达440%的伸缩变形,判据是取金属铜的塑性屈服值0.3%,这意味着该光伏器件能保证一定的疲劳性能。
[Abstract]:Flexible electronics industry relies on a new electronic technology which makes electronic devices on flexible or extensible plastic or thin metal substrate. This kind of products have the characteristics of bending, extensibility, controllable physical life and so on. In contrast, the traditional lithography technology has many problems, such as large format, non-plane, low temperature manufacturing and so on, and the compatibility of organic materials is poor, the manufacturing cost is high, and it is not suitable for the manufacturing requirements of large area flexible electronic devices. Injectable micro optoelectronic devices are a typical application of the category. The thermal properties of 渭-LEDs lattice structure in tissues are very important because overheating may lead to tissue damage and adverse reactions. In order to better understand the operation of the device and establish the general criterion for designing 渭-LED and minimize the thermal effect, a theoretical model for pulse mode operation is proposed in this paper, and the finite element analysis (FEA) and experimental verification are carried out. In this paper, not only the theoretical solution of the maximum temperature of 渭-LED is obtained, but also the simple proportional relationship among the parameters that affect the maximum temperature change is established, which can be used to optimize the performance of the device. Retractable gallium arsenide photovoltaic devices with high area coverage ultra-thin matrix are another application in this field. On the basis of reasonable mechanical design, finite element numerical analysis and theoretical analysis and demonstration of the model, the structure of matrix bonding super-extensibility interconnection of island bridge structure is proposed to meet the requirements of up to 91% area coverage and 4.4% local extension, and to realize the high energy acquisition and storage rate of photovoltaic modules. Ultra-thin matrix can be better integrated into roofs and even wearable devices to meet the different needs of civil and military. On the premise of ensuring that the system can be retractable 20%, the interconnection structure designed in this paper adopts a first-order serpentine structure, and the Ecoflex imitating skin material used in the grooves bears up to 440% telescopic deformation. The criterion is 0.3% of the plastic yield of copper, which means that the photovoltaic device can ensure a certain fatigue performance.
【学位授予单位】：上海交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN312.8

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