新型膜状静电放电抑制器的测试方法及性能参数研究

发布时间：2018-03-15 04:23

本文选题：静电放电　切入点：防护　出处：《武汉理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着电子技术的发展,静电放电(Electrostatic Discharge,ESD)问题日益凸显,同时电子产品的集成化发展也促使电子器件的敏感度不断提高,静电防护设计的难度不断加大。目前使用ESD防护器件是一种较为直接、有效的解决方法,有助于提高系统抗扰度。为了配合一种新型膜状ESD抑制器的研制,针对该抑制器的ESD防护特性,本文从基本原理、测试方法、测试讨论以及结果对比等方面展开了一系列研究工作。主要分为以下两部分:(1)ESD防护性能测试方法的研究。搭建了两种静电防护性能的测试系统——人体金属模型和传输线脉冲测试系统,并通过实验进行深入研究。人体金属模型测试是一种瞬态测试,能够模拟真实的静电放电现象。一次脉冲测试就能得到一系列详细的防护参数,测试方便快捷但精度较差;人体金属模型测试中放电电压的选取对钳位电压、峰值电压、消散功率等参数有一定影响,但与响应时间、导通阻抗、维持点电压和电流等关键参数没有关联。而传输线脉冲系统是一种暂稳态测试,用计算电流代替测量电流,可以减少测试设备,提高系统精确度,而且测试参数更为全面,但不能模拟真实放电情况。为了分析两种系统的相关性,对比同一器件在两种不同系统中的测试结果。结果表明对于响应速度快的ESD防护器件,两种方法得到的测试参数一致性较好,可相互代替,而对于响应速度慢、瞬态与暂稳态特性不一致的器件,两种测试结果有一定的差异。(2)新型膜状ESD抑制器的性能测试与分析。该抑制器利用纳米技术将高分子和导电材料融合一起,根据内部结构的隧道效应,使其在不同的电压条件下分别呈现绝缘性和导电性,具备ESD防护功能。设计样品测试板,测量该抑制器的防护特性,并与TVS二极管和压敏电阻进行比较。结果表明该膜状ESD抑制器绝缘阻抗高、寄生电容小,具有较好的透明性;将其直接添加至PCB板的地层和信号层之间,避免了大量ESD防护器件的使用,不占用板上面积、利于产品集成化,而且节约了制作成本;相较于TVS和压敏电阻,该抑制器稳定性差、触发电压高、ESD防护设计窗口宽,其ESD防护性能仍有待改善。
[Abstract]:With the development of electronic technology, the problem of Electrostatic discharge (ESD) becomes more and more prominent. Meanwhile, the integration of electronic products also promotes the sensitivity of electronic devices. The design of electrostatic protection is becoming more and more difficult. At present, the use of ESD protective devices is a more direct and effective solution, which is helpful to improve the immunity of the system. In order to cooperate with the development of a new type of membrane ESD suppressor, According to the ESD protection characteristics of the suppressor, this paper introduces the basic principle, testing method, A series of research work has been carried out in the aspects of test discussion and comparison of results. It is mainly divided into the following two parts: the research of ESD protection performance test method. Two kinds of electrostatic protection performance test system-human body metal model and human body metal model are set up. Transmission Line Pulse Test system, The human metal model test is a transient test, which can simulate the real electrostatic discharge phenomenon. A series of detailed protection parameters can be obtained by one pulse test, which is convenient and fast, but the accuracy is poor. The selection of discharge voltage in human metal model test has a certain influence on the clamp voltage, peak voltage, dissipation power and other parameters, but with response time, on impedance, The transmission line pulse system is a kind of transient state test. The calculation current instead of the measuring current can reduce the testing equipment, improve the accuracy of the system, and the test parameters are more comprehensive. In order to analyze the correlation between the two systems, the test results of the same device in two different systems can not be simulated. The results show that for the ESD protection devices with high response speed, The test parameters obtained by the two methods are consistent and can be replaced by each other. However, for devices with slow response speed and inconsistent transient and transient characteristics, There is a certain difference between the two kinds of test results. (2) the performance test and analysis of the novel membrane ESD suppressor, which uses nanotechnology to fuse polymer and conductive materials, according to the tunneling effect of internal structure. Make it present insulation and conductivity under different voltage conditions, with ESD protection function. Design sample test board, measure the protective characteristics of the suppressor, Compared with TVS diode and varistor, the results show that the film ESD suppressor has high insulation impedance, small parasitic capacitance and good transparency, and is directly added to the layer and signal layer of PCB plate. The utility model avoids the use of a large number of ESD protective devices, does not occupy the area on the board, is conducive to product integration, and saves production costs. Compared with TVS and varistor, this suppressor has poor stability, high trigger voltage and wide window for ESD protection design. Its ESD protection performance still needs to be improved.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN607;O441.1

【参考文献】