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. > For more information please contact helpdesk at x2960 or > [log in to unmask] > ______________________________________________________________________ > ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________