2008 · 10 citations · 5 references
EngineeringMaterials EngineeringMaterials ScienceCorrosion ScienceElectronic MaterialsSemiconductor DevicesDegradation ProductsDeterioration MechanismsMaterial DegradationMaterial Degradation AssessmentMaterial Deterioration ProcessesSemiconductor ReliabilityAging CharacterizationDegradation MonitoringIncoming Quality InspectionReliability Degradation MechanismsWear-out Mechanisms
Moisture-induced silver reactions have been identified as a fast degradation mechanism in commercial plastic packaged white LEDs, that passed a standard incoming lot inspection but resulted all degraded at the switching-on after mounting on the final boards. The source of the contaminant (Sulphur) is not explained by any part of the available history of the devices in the lot. Anyway, each one of three possible scenarios depicts a reliability issue that escaped the process monitors and reached the shelf.
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Failure Modes and Mechanisms of DC-Aged GaN LEDs
Gaudenzio Meneghesso, S. Levada, Enrico Zanoni et al. · physica status solidi (a) · 2002 · 57 citations