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A Novel Approach for Evaluation of Material Interfaces in Electronics

机译:一种评价电子材料界面的新方法

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the rapid technological advancements and market demands in electronic sector requires application of highly accelerated, still practice relevant reliability assessment methods. At present, accelerated power and temperature cycling tests count as the state of the art for qualification of the devices. However due to physical characteristics of the devices, there are limitations to accelerated thermal and power cycling tests. Further acceleration by exceeding a critical temperature or time reduction may result in occurrence of failure mechanisms other than those encountered in real application or suppressing these failures. An alternative approach for further acceleration of the testing procedures is based on the application of isothermal mechanical fatigue testing at high frequencies (AMT). The principle idea of this approach is replacement of thermally induced strains by means of equivalent mechanical strains. Based on a physics of failure approach, the relevant failure modes in the material interfaces are induced enabling detection of weak sites of the devices in a very short duration of time. In addition of time saving factor a further advantage of mechanical fatigue testing is the possibility of decoupling of thermal, mechanical and environmental stress factors for a more effective investigation and diagnosis. This paper presents an overview of our recent reliability studies on different types of electronic components by using the proposed methodology with the aim to give an insights into the advantages and some restrictions of AMT for qualification of electronic devices.
机译:电子部门的快速技术进步和市场需求需要高速加速,仍然练习相关的可靠性评估方法。目前,加速的电力和温度循环试验作为设备资格的最新技术。然而,由于设备的物理特性,加速热和电源循环测试存在局限性。通过超过临界温度或时间减少的进一步加速可能导致除了在实际应用中遇到的失败机制或抑制这些故障的影响。进一步加速测试程序的替代方法是基于高频(AMT)的等温机械疲劳试验的应用。这种方法的原理思想是通过等同的机械菌株更换热诱导的菌株。基于故障方法的物理学,材料界面中的相关失效模式诱导在非常短的时间内能够检测器件的弱部位。随着时间的推移,机械疲劳测试的进一步优点是用于更有效的调查和诊断的热,机械和环境应力因子去耦的可能性。本文概述了我们最近通过使用所提出的方法的不同类型电子元件的可靠性研究,其目的是对电子设备资格进行鉴定,了解AMT的优势和一些限制。

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