本文選題：靜電放電　切入點：防護(hù)　出處：《武漢理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著電子技術(shù)的發(fā)展,靜電放電(Electrostatic Discharge,ESD)問題日益凸顯,同時電子產(chǎn)品的集成化發(fā)展也促使電子器件的敏感度不斷提高,靜電防護(hù)設(shè)計的難度不斷加大。目前使用ESD防護(hù)器件是一種較為直接、有效的解決方法,有助于提高系統(tǒng)抗擾度。為了配合一種新型膜狀ESD抑制器的研制,針對該抑制器的ESD防護(hù)特性,本文從基本原理、測試方法、測試討論以及結(jié)果對比等方面展開了一系列研究工作。主要分為以下兩部分:(1)ESD防護(hù)性能測試方法的研究。搭建了兩種靜電防護(hù)性能的測試系統(tǒng)——人體金屬模型和傳輸線脈沖測試系統(tǒng),并通過實驗進(jìn)行深入研究。人體金屬模型測試是一種瞬態(tài)測試,能夠模擬真實的靜電放電現(xiàn)象。一次脈沖測試就能得到一系列詳細(xì)的防護(hù)參數(shù),測試方便快捷但精度較差;人體金屬模型測試中放電電壓的選取對鉗位電壓、峰值電壓、消散功率等參數(shù)有一定影響,但與響應(yīng)時間、導(dǎo)通阻抗、維持點電壓和電流等關(guān)鍵參數(shù)沒有關(guān)聯(lián)。而傳輸線脈沖系統(tǒng)是一種暫穩(wěn)態(tài)測試,用計算電流代替測量電流,可以減少測試設(shè)備,提高系統(tǒng)精確度,而且測試參數(shù)更為全面,但不能模擬真實放電情況。為了分析兩種系統(tǒng)的相關(guān)性,對比同一器件在兩種不同系統(tǒng)中的測試結(jié)果。結(jié)果表明對于響應(yīng)速度快的ESD防護(hù)器件,兩種方法得到的測試參數(shù)一致性較好,可相互代替,而對于響應(yīng)速度慢、瞬態(tài)與暫穩(wěn)態(tài)特性不一致的器件,兩種測試結(jié)果有一定的差異。(2)新型膜狀ESD抑制器的性能測試與分析。該抑制器利用納米技術(shù)將高分子和導(dǎo)電材料融合一起,根據(jù)內(nèi)部結(jié)構(gòu)的隧道效應(yīng),使其在不同的電壓條件下分別呈現(xiàn)絕緣性和導(dǎo)電性,具備ESD防護(hù)功能。設(shè)計樣品測試板,測量該抑制器的防護(hù)特性,并與TVS二極管和壓敏電阻進(jìn)行比較。結(jié)果表明該膜狀ESD抑制器絕緣阻抗高、寄生電容小,具有較好的透明性;將其直接添加至PCB板的地層和信號層之間,避免了大量ESD防護(hù)器件的使用,不占用板上面積、利于產(chǎn)品集成化,而且節(jié)約了制作成本;相較于TVS和壓敏電阻,該抑制器穩(wěn)定性差、觸發(fā)電壓高、ESD防護(hù)設(shè)計窗口寬,其ESD防護(hù)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.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN607;O441.1

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本文編號：1614422