I guess you forgot to attach the thread :-)
Vladimir
Sent from my BlackBerry 10 smartphone.
Original Message
From: Ed Popielarski
Sent: Thursday, October 8, 2015 00:27
To: [log in to unmask]
Reply To: TechNet E-Mail Forum
Subject: Re: [TN] ENIG VS. ammonia
This thread in this forum:
Re: [TN] ENIG coating durability
Ed Popielarski
Engineering Manager
970 NE 21st Ct.
Oak Harbor, Wa. 98277
Ph: 360-675-1322
Fx: 206-624-0695
Cl: 949-581-6601
“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.”
https://maps.google.com/maps/myplaces?hl=en&ll=48.315753,-122.643578&spn=0.011188,0.033023&ctz=420&t=m&z=16&iwloc=A
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Vladimir Igoshev
Sent: Wednesday, October 07, 2015 3:07 PM
To: [log in to unmask]
Subject: Re: [TN] ENIG VS. ammonia
Hi Ed,
Black pad would have nothing to do with amonia. How do you know it's Black Pad in a fist place?
Regards,
Vladimir
SENTEC
Sent from my BlackBerry 10 smartphone.
Original Message
From: David Hillman
Sent: Wednesday, October 7, 2015 23:59
To: [log in to unmask]
Reply To: TechNet E-Mail Forum
Subject: Re: [TN] ENIG VS. ammonia
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
>
> Ph: 360-675-1322
> Fx: 206-624-0695
> Cl: 949-581-6601
>
>
>
> "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."
>
> https://maps.google.com/maps/myplaces?hl=en&ll=48.315753,-122.643578&s
> pn=0.011188,0.033023&ctz=420&t=m&z=16&iwloc=A
>
>
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