SOLDER FATIGUE IMPACTS OF CONFORMAL COATING FOR TIN WHISKER MITIGATION ON CHIP-SCALE THIN SMALL OUTLINE PACKAGES

被引:0
|
作者
Geisler, Karl J. L. [1 ]
机构
[1] Gen Dynam Adv Informat Syst, Bloomington, MN 55431 USA
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D O I
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中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
This study explores the impact of polyurethane conformal coating on the solder fatigue life of 0.5 mm pitch, thin small outline package (TSOP) components. Test samples were subjected to temperature cycling from -40 degrees C to +100 degrees C. Uncoated samples were tested in addition to sets with 10, 13, and 20 gm thick coatings. Solder joint failure data fit to 3-parameter Weibull distributions demonstrate characteristic fatigue life reductions of 30% with increasing coating thickness but relatively subtle changes to the failure distribution shape.
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页码:915 / 920
页数:6
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