Hi all,

I am looking for reliability information on high intensity LED
illumination

1. Some vendors are supplying devices which seem like they contain a
bare die on ceramic substrate. Is there any encapsulation there or maybe
it is not required?

2. Is there a good basis for estimating life? We know light output will
degrade but we don't know how to extrapolate to 20,000 or 100,000 hours
which the vendors claim

3. What are the most common failure mechanisms, and how can we
accelerate tests, to look for them

Thanks in advance,
Moshe Valdman
Reliability Manager
Orbotech

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