Assessing the impact of uncertainty in physics of failure analysis of BGA solder joints fatigue damage

Solder joint fatigue life models will be used for analysis in this paper. Identifying an approach for quantifying the combination of input and uncertainty would enable the determination of more realistic confidence limits on PoF predictions. Variability in the physical parameters can be addressed by existing stochastic methods, which are designed to propagate probability distributions on the parameters through a fixed model structure in order to estimate the statistics of interest on the model response quantities. This paper focuses on uncertainly analysis, that is, how the input data uncertainly affects the output data uncertainly. We are assuming the model is correct and are only dealing with uncertainties due to variations in inputs. Output uncertainty, uncertainly in the correction factor, is determined by Monte Carlo simulation.