Hi Dave,

MSL6? Wow, I haven't run across any that moisture sensitive yet. Are the
assemblies in a cleaning process or no-clean? We have a customer that we
use a lot of LED's and were cleaning, but switched to building them
no-clean mainly because we were seeing that the silicone lenses were
getting damaged or sometimes popping right off. Most of the LED's we use
for this customer come from CREE... but no MSL6 yet.

Steve


On Mon, Sep 9, 2019 at 1:43 PM Dave Schaefer <[log in to unmask]> wrote:

> James,
>
> Thanks for the quick reply.
>
> The components in question are from a single manufacturer and are MSL6
> devices. They are properly stored and processed by the CM; have verified
> the appropriate pre-bake and reflow profile are being used. The majority of
> the failures we have seen are instant hard failures after bare board
> assembly but we have seen a few creep through into final assemblies. At
> this point I believe all components consumed are from a single lot from the
> manufacturer. I have reached out to the manufacturer in an attempt to
> determine how they assure component quality prior to shipment but they have
> not shared any information of value.
>
> Thanks,
> Dave
>


-- 
Steve Gregory
Kimco Design and Manufacturing
Process Engineer
(208) 322-0500 Ext. -3133

-- 



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