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塑封器件失效机理及其快速评估技术研究 总被引:4,自引:3,他引:1
针对影响塑封器件可靠性的五种失效机理,即腐蚀失效、爆米花效应、低温/温冲失效、闩锁以及工艺缺陷等方面进行分析和讨论,并提出利用高温潮热和温度冲击试验对塑封器件的可靠性进行评估.还介绍了美国航天局Goddard空间飞行中心提出的对塑封器件进行高可靠性筛选的方案. 相似文献
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随着塑封器件高可靠性应用日益广泛,塑封产品的研制和生产需求不断增加。分析了塑封器件可能存在的热机械缺陷、腐蚀、爆米花效应,以及生产工艺中可能引入的封装、芯片粘接、钝化层等缺陷,从设计和工艺角度给出控制措施。介绍了国内外高可靠性塑封器件筛选、鉴定检验的典型流程及质量控制措施,用于在生产阶段剔除潜在缺陷的不合格品,保证产品具有高可靠性。 相似文献
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针对进口工业级塑封器件本身的材料、结构等特点,列出了塑封器件存在的主要问题,得出了塑封器件在使用前,要进行采购、筛选、评价、DPA分析等工作,从而提高塑封器件应用于军用武器的使用可靠性。 相似文献
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Qualification testing programs have been developed for assessing the reliability of commercial grade discrete semiconductors for use in office business machines. These programs include accelerated stresses of high temperature storage (HTS) and high temperature reverse bias (HTRB) for 1000 hours, and a sequence test of thermal cycle and thermal shock followed by storage at 85°C and 85% RH (85/85) for 1000 hours. Both hermetic and plastic encapsulated parts have been tested more than 15 million part hours. HTRB and 85/85 are about twice as effective as HTS in identifying potentially unreliable parts. Plastic packaged semiconductors are inherently capable of withstanding 85/85 for 1000 hours without parameter degradation. The value of qualification testing against the 85/85 environment is demonstrated by the observed correlation of machine failure rates in the field with the relative humidity in the use environment. The observed failure rate of plastic parts is not more than 3.2 times that of hermetic parts. Plastic parts are capable of reliable operation, but the marked differences in reliability between different vendors and between different part types from the same vendor require increased process and materials control in order to achieve the potential of which plastic parts are capable. 相似文献
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晶片级测试方法是半导体器件(VLSI)金属化可靠性试验中的一种新方法,本研究在现有设备的基础上进行了一系列的设计和改进,建立了一套同微机控制的晶片级金属化电徒动测试系统,为金属化可靠性测试和在线监测的研究奠定了良好的基础。 相似文献
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在对塑封集成电路进行封装可靠性评估中,预处理过程是必经的步骤,其中的浸润测试通常在非加速条件下进行,耗时较长。在市场竞争日趋激烈的环境下,企业迫切需要缩短新产品的可靠性验证时间。针对JEDEC(电子器件工程联合委员会)和JEITA(日本电子信息技术协会)标准中涉及到的三种加速浸润条件,以组件在非加速条件下(JEDECLevel3和JEITARankE)潮气的穿透力、吸收量及由此产生的失效为参照,确定在加速条件下,组件达到同样的潮气吸收量并产生相类似的失效所需的时间;同时应用有限元分析的方法进行建模和计算,并与实际的测量结果比较验证。 相似文献
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A novel method for the preparation of transparent conducting‐polymer patterns on flexible substrates is presented. This method, line patterning, employs mostly standard office equipment, such as drawing software, a laser printer, and commercial overhead transparencies, together with a solution or dispersion of a conducting polymer. The preparation of a seven‐segment polymer‐dispersed liquid‐crystal display using electrodes of the conducting polymer poly(3,4‐ethylenedioxythiophene) doped with poly(4‐styrene sulfonate) (PEDOT/PSS) is described in detail. Furthermore, a method to fabricate an eleven‐key push‐button array for keypad applications is presented. Properties of the electrode films and patterns are discussed using microscopy images, atomic force microscopy, conductivity measurements, and tests of film stability. 相似文献