Simulation Of The Influence Of Manufacturing Quality On Reliability Of Vias
A. Dasgupta and V. Ramappan
Technique based on physics-of -failure principles are fairly well established for mechanical design of electronic packages. This paper provides an example where such techniques can also be exploited to develop guidelines for assessment of manufacturing quality and its impact on reliability. As a case study, plating waviness in Plated Through Holes (PTH) is modeled to investigate their performance during solder reflow cycles and during subsequent operational thermal cycling. The stress analysis is performed with elastic-plastic finite element models which are seeded with various levels of plating finite element models which are seeded with various levels of plating waviness defects. Sensitivity analysis is done with factorial parametric simulation studies based on Design of Experiment (DOE) methods. Buckling and fatigue failure models are used to establish inspection criteria for acceptable thresholds of plating waviness.
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