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在电源LED包中使用Au,Cu和PCC的粘合线疲劳

Bernhard Czerny¹, Sebastian Schuh¹

¹Department Energy and Environment, Applied Electronics and Photonics, University of Applied Sciences Burgenland, Campus 1, 7000 Eisenstadt, Austria.

|November 25, 2023

概括

一个新的机械疲劳测试系统加速了对功率LED的结合线可靠性评估. 这种方法提供了更快,更准确的材料寿命数据,减少了长时间的热试验的需要.

科学领域:

材料科学材料科学材料科学
机械工程机械工程
电气工程电气工程

背景情况:

热力学疲劳,特别是电线部断裂,是功率LED设备的主要可靠性问题.
目前的标准寿命评估方法 (热循环/冲击测试) 是耗时的.
现有的模拟方法在没有实验性疲劳验证的情况下,难以提供准确的可靠性数据.

研究的目的:

开发一种新的机械疲劳测试系统,以诱导功率LED的关键结合线区域的应力.
为了加速在线圈部的疲劳裂启动,模仿热试验失效模式.
在显著缩短的时间框架内获得可靠的材料寿命数据.

主要方法:

开发了一种机械疲劳测试系统,用于对粘接线的关键部区域施加压力.
在低频和高频激发下对25微米Au,Cu和Pd涂层的Cu粘接线进行实验性疲劳测试.
有限元模拟以量化线上的应力,并与实验结果相关联.

主要成果:

开发的测试系统成功诱导了疲劳裂,复制了在热试验中看到的故障模式.
获得了从100到100万个周期的电线结合寿命,提供了快速的材料数据.
有限元分析量化了应力,使得与传统方法和材料模型进行比较.

结论:

拟议的机械疲劳测试系统提供了一个更快,更有效的替代传统的热测试,以电源LED结合线的可靠性.
这种方法提供关键的材料生命周期数据,样本准备最少,有助于设计评估.
该系统有助于更深入地了解LED和微电子组件中的细线结合可靠性.

关键词:

在CTE不匹配的情况下.加快的机械疲劳测试.频率效应影响频率效应整个生命周期的模型.失效的物理性失效的物理性热力机械疲劳的疲劳

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