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WLCSP器件Sn3.9Ag0.6Cu焊点疲劳寿命预测

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摘要 基于蠕变模型采用有限元法对WLCSP30器件Sn3.9Ag0.6Cu焊点可靠性及疲劳寿命进行预测.研究发现WLCSP器件整体的最大应力集中在阵列最拐角焊点的上表面处,该部位可能成为焊点裂纹的发源地,试验结果也验证了模拟结果的正确性.对焊点应力—应变分析,发现焊点部位出现明显的蠕变应变和蠕变应变能累积现象,结合焊点疲劳寿命方程,预测焊点疲劳寿命,发现基于蠕变应变能密度的计算结果和试验结果较吻合,但是基于蠕变应变的预测结果和试验结果相差较大,因此基于蠕变应变的疲劳寿命预测方程需要进一步的研究.
作者 顾立芬
出处 《辽宁经济职业技术学院学报.辽宁经济管理干部学院》 2012年第2期97-98,共2页 Journal of Liaoning Economy Vocational and Technical College. Journal of Liaoning Economic Management Cadre College
基金 江苏科技大学先进焊接技术省级重点实验室开放研究基金资助课题(JSAWS-11-03) 徐州师范大学自然科学研究基金资助项目(11XLR16)
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