Abstract
LED lifetime and reliability are strong differentiators for a luminaire assembler. An LED being more a system and not a single device means reliability analyses are complex. The different subparts constituting the LED present different failure modes and mechanisms, as well as different responses to stresses. In this chapter, the latest results of LED early failure investigation are presented. In a first part, an introduction to early failure management in reliability studies will be presented. In the second part of this chapter, the different critical steps in LED production and their variability and quality impact will be reviewed. The third part explains postproduction weak LED detection method at the LED assembly side as well as the modeling, characterization, and measurement techniques. Last part details early failure signatures, identified defects, and how they are linked to production process steps.
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Hamon, B., Merelle, T., Bataillou, B. (2018). LED Early Failures: Detection, Signature, and Related Mechanisms. In: van Driel, W., Fan, X., Zhang, G. (eds) Solid State Lighting Reliability Part 2. Solid State Lighting Technology and Application Series, vol 3. Springer, Cham. https://doi.org/10.1007/978-3-319-58175-0_3
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DOI: https://doi.org/10.1007/978-3-319-58175-0_3
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