Hi Steve! I would recommend you select a bare board from the stock that produced the assembly photos and take a picture of both sides. When taking the picture, if the pads exhibit a topography, try to take the pic at an angle that shows the topography. If the pads do not show a topography make sure the pics you select show that too. With these pictures, I think we can all nail this one from the bare board side because the assembly pics tend to add some confusion. Brs, Gerry Gagnon > Date: Tue, 1 Oct 2013 17:14:03 -0600 > From: [log in to unmask] > Subject: Re: [TN] HASL question > To: [log in to unmask] > > Okay here's another picture. I printed a solder sample and sent it > through the oven and this is what it looked like: > > http://stevezeva.homestead.com/SolderSample.jpg > > You can see all the non-wetting going on. The board was profiled and it > was fine. We are using a FCT Assembly WS889 SN100C solder paste. > > What is even more strange is that the first side of the board looked > okay, but the second side looks like in the photos, like the problem is > confined to one side of the board if that's possible. > > The solder sample was only reflowed once, but I printed the paste on the > side that was to be built last. Weird huh? > > I know you can't tell anything for sure just from some photos, but it's > the strangest thing I've seen in a while... > > Steve > > -----Original Message----- > From: Steve Gregory > Sent: Tuesday, October 1, 2013 4:46 PM > To: [log in to unmask]; Steve Gregory > Subject: RE: [TN] HASL question > > Here's one picture: > > http://stevezeva.homestead.com/NonWetting.jpg > > Look at the left pad and the tarnish that you see there, does that look > like tarnished nickel? > > This is after the board was washed. I have places all over the board > that looks like this. > > I'll post a picture of what it looks like after I printed a solder > sample with paste and sent it through the reflow over > > Steve > > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory > Sent: Tuesday, October 1, 2013 4:16 PM > To: [log in to unmask] > Subject: Re: [TN] HASL question > > Ahhhh....it's what I figured. I think that's what happened. I'll have > pictures later. > > Steve > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Wayne Thayer > Sent: Tuesday, October 1, 2013 4:15 PM > To: [log in to unmask] > Subject: Re: [TN] HASL question > > No. Not unless somebody screwed up. > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory > Sent: Tuesday, October 01, 2013 6:11 PM > To: [log in to unmask] > Subject: Re: [TN] HASL question > > Hi all, > > It's funny that the HASL topic has come up today, because we just ran a > board today that supposedly was lead-free HASL finished, and man it > looks like crap! > > Question; does a PCB get nickel before it gets Lead-free HASL'ed? > > Steve > > -----Original Message----- > From: TechNet [mailto:[log in to unmask]] On Behalf Of Vladimir Igoshev. > PhD > Sent: Tuesday, October 1, 2013 2:23 PM > To: [log in to unmask] > Subject: Re: [TN] HASL question > > Hello Victor, > > It wouldn't solder in a first palce. > > -- > Best regards, > > Vladimir Igoshev. PhD > mailto:[log in to unmask] > > SENTEC Testing Laboratory Inc. > 11 Canadian Road, Unit 7. > Scarborough, ON M1R 5G1 > Tel: (416) 899-1882 > Fax: (905) 882-8812 > www.sentec.ca > > ______________________________________________________________________ > 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] > ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. 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