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Date: | Wed, 7 Oct 2015 16:58:47 -0500 |
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Hi Ed - if the root cause of the attack is the peelable mask, then you
should be able to reproduce the same issue on any ENIG board and not just
this specific lot/supplier. There are lots of possible root causes for what
you described - plating issues, cleaning issues, etc.
Dave Hillman
Rockwell Collins
[log in to unmask]
On Wed, Oct 7, 2015 at 3:46 PM, Ed Popielarski <[log in to unmask]>
wrote:
> Hi all,
>
> I Have a batch of boards showing what I believe to be black pad. This is
> surfacing at thru hole (solderability, some pads are turning orange). One
> person suggested the peelable solder mask contains ammonia and this is what
> is causing it. I disagree.
>
> Suggestions or comments?
>
> Ed Popielarski
> Engineering Manager
>
> [cid:[log in to unmask]]
> 970 NE 21st Ct.
> Oak Harbor, Wa. 98277
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>
>
> "It's one kind of victory to slay a beast, move a mountain, and
> cross a chasm, but it's another kind altogether to realize that the beast,
> the mountain, and the chasm were of your own design."
>
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>
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