Failure modes and failure analysis of white LEDs

Reliability is one of primarily considered problems in white LED application. In this presentation, main failure modes in white LEDs such as ohmic contact degradation, electrode bonding defect, thermal mismatch and degradation of the encapsulation material, as well as ESD damage were analyzed, also combination with many failure analysis practices. Finally, several reliability assurance measures were discussed, which is helpful to improve reliability of LEDs in the solid state lighting applications.