³Ô¹Ïtv / ENGINEERING EXPLANATIONThermal-mismatch displacement indicator: inputs and limits01Package effective CTE · ppm/KSimplified constant effective CTEassumption; not a local material model.02Board effective CTE · ppm/KUse a justified in-plane direction andtemperature range.03Temperature excursion magnitude· KGeometric differential movement only, notfatigue life.04Distance from neutral point ·mmSelected joint distance in the simplifiedmodel.Use the exact drawing and a declared revision. Examples are not approved process limits.Illustrative geometry only. Not to scale, a production setting or evidence of qualification.