Investigation of IMC layer effect on PBGA solder joint thermal fatigue reliability

被引：0
|
作者：
Che, FX [1 ]
Pang, JHL [1 ]
Xu, LH [1 ]
机构：
[1] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore
来源：
PROCEEDINGS OF THE 7TH ELECTRONICS PACKAGING TECHNOLOGY CONFERENCE, VOLS. 1 AND 2 | 2005年
关键词：
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Thermal cycling reliability test and analysis for PBGA with Sn-3.8Ag-0.7Cu lead free solder joints with Ni/Au surface finish were investigated. Failure mode of PBGA component exhibits solder fatigue failure with failure site close to solder/IMC interface. The MTTF was determined by Weibull model and used to calibrate the finite element analysis (FEA) results. Intermetallic compound (IMC) layers of CuNiSn are formed when SnAgCu solder is reflowed on PCB board with Ni/Au finish. The reliability of electronic assembly is affected by IMC during thermal cycling. In this paper, finite element analysis of solder joint reliability has been developed to model the effect of IMC layer on solder joint fatigue behavior. It is shown that the IMC layer reduces the solder joint fatigue life. In this study, the elastic modulus for CuNiSn IMC was measured by nanoindentation using a continuous stiffness measurement technique. The IMC elastic modulus effect on solder fatigue was also investigated by FEA modeling.
引用
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页码：427 / 430
页数：4
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