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December 2013

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Subject:
From:
Reuven Rokah <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Reuven Rokah <[log in to unmask]>
Date:
Tue, 10 Dec 2013 20:11:21 +0200
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MSL 3 is Okay.
For PCBs above 2mm with more than 12 layers, I prefer to define them as MSL
=4.

Wave soldering is indeed thermal event.


On Tue, Dec 10, 2013 at 7:20 PM, MaryJane Chism
<[log in to unmask]>wrote:

> Hi Group,
>
> I have a question concerning the moisture level of a printed circuit board.
>
> 1) Does a printed circuit board have an MSL level? We have been treating
> the printed circuit as an MSL Level 3.
> 2) Should we consider the wave solder as a thermal event even though the
> wave carriers shield all areas of the printed circuit board except the
> specific through hole areas. We currently do but should we?
>
> Any information you give will be helpful,
>
> Thanks,
>
> Mary Jane
>
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