Well, I've been saying all the time that there is ONLY ONE direct evidences of BP - streaks in E-Ni. Thickness of the layer most probably has nothing to do with the majority of problems people see with ENIG. Thickness of IAu is important, though.
If you want us to give you a hand getting down to the root cause, please contact me off line.
Regards,
Vladimir
Sent from my BlackBerry 10 smartphone.
Original Message
From: Ed Popielarski
Sent: Thursday, October 8, 2015 17:22
To: TechNet E-Mail Forum; [log in to unmask]
Subject: RE: [TN] ENIG VS. ammonia
Can't attach anything on Technet (server strips it) but you can look it up here:
http://listserv.ipc.org/scripts/wa.exe?A2=ind1510&L=TechNet&P=R3873&1=TechNet&9=A&J=on&d=No+Match%3BMatch%3BMatches&z=4
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 10:25 PM
To: [log in to unmask]
Subject: Re: [TN] ENIG VS. ammonia
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
>
>
> ______________________________________________________________________
> This email has been scanned by the Symantec Email Security.cloud service.
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> [log in to unmask]
> ______________________________________________________________________
>
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