Characterizing substrate interface viscoelastic shear relaxation prevents dynamic thermal offset drift and avoids expensive late stage packaging redraws.
Polymer viscoelastic stress relaxation in molded MEMS packages causes long-term zero-point offset drift that requires cavity isolation or baked burn-in.
Precision voltage reference accuracy depends on isolating packages from board flexure, balancing trace Seebeck junctions, and blocking thermal conduction paths.
Board flexure stress couples to analog dies via solder joints and mold compounds, shifting bandgap voltages up to 10 millivolts under thermal cycling.
Driving current from an analog sensor output heats internal silicon sub-circuits, creating thermal gradients that drift the internal voltage reference beyond nominal tolerances.
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