SAC305, no S in mixture, so not PbS 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: Yuan-chia Joyce Koo [mailto:[log in to unmask]] Sent: Wednesday, October 07, 2015 5:35 PM To: TechNet E-Mail Forum; Ed Popielarski Subject: Re: [TN] ENIG VS. ammonia (1) is the ENIG soldered using Pb/Sn? (2) peelable MSDS containing S? (thiol? UV curable?) if both answer are yes, you might have PbS - orange color. just a guess. jk On Oct 7, 2015, at 6:25 PM, Ed Popielarski wrote: > 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] > ______________________________________________________________________ ______________________________________________________________________ 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] ______________________________________________________________________