Case 873 ยท Public preview
Encapsulant Shrinkage Can Progress from Cloudy LEDs to Complete Lens Loss
LEDs exposed to autoclave or field conditions developed cloudy optics, fractured lenses, broken leads, or complete loss of the lens and die.
Optical microscopySEMEDSMicrosectioningFailed/reference comparison
What the evidence preview establishes
Elevated-temperature exposure produced post-cure shrinkage cracks and separation of the epoxy lens from the die and ceramic cup. Marginal adhesion allowed damage to progress from optical clouding to extensive fracture and complete lens loss, while steam exposure likely aggravated moisture ingress.
Why this case matters
Optical clouding can be a structural warning rather than a cosmetic defect. Encapsulant cure, thermal exposure, moisture ingress, and adhesion to every internal surface should be treated as one package-reliability system.
Full evidence reserved for MEMBER and STOREThe complete case includes the evidence sequence, four interpreted figures, alternative explanations, limitations, and practical application guidance.