Electronics Forum | Wed Sep 09 09:38:53 EDT 2009 | patrickbruneel
Dave is correct (as usual). Baking the boards might reduce blowholes but will definitely not eliminate the problem. Back in my hay days we had a huge problem with blowholes and we baked boards 24/7 with very little success in reducing blowholes (ev
Electronics Forum | Fri Sep 04 02:09:03 EDT 2009 | sachu_70
Hi Walter, Do you refer to a sprayfluxer operation? The problem seems to be a parameter setting issue. 1. Ensure the wide angle spray reaches PCB with optimum jet pressure. You could pass a glass plate to understand flux coverage and view Jet pressur
Electronics Forum | Fri Oct 02 11:23:08 EDT 2009 | floydf
Does anyone out there have experience soldering > with Pb solder (Sn 63 or Sn 62) to SAC 305 coated > PCB lands (about 50um) or Sn-Cu plated lands > (about 10um). I know soldering Pb free (Sac based > soler) to Pb/Sn coated lands is a no-no, but
Electronics Forum | Thu Nov 19 13:49:00 EST 2009 | bricke
We have been manufacturing a part using bright electrolytic tin as the finish. Our customer has been hand soldering using 63/37. They have recently switched to SN96 and have been experiencing solderability issues. We have sent samples to an outside
Electronics Forum | Mon Jan 04 21:32:40 EST 2010 | boardhouse
Conductive Anodonic Filament My worry is that any extra moisture added to the Lead free Material during assembly may cause this Conductive filament to grow within the material weave. They are water washing after through hole assembly and then after
Electronics Forum | Thu May 06 13:06:36 EDT 2010 | dwonch
Unfortunately nothing ground breaking to report. The board shops analysis (SEM/EDS)showed high levels of carbon and oxygen, likely indicating an organic based contaminate. They are still stumped on where it is coming from. We recieved some boards y
Electronics Forum | Thu Jun 17 12:32:25 EDT 2010 | floydf
Last July I posted a query about reflowing leaded > paste to gold plated boards, I wasn't getting a > good reflow. The answer that seemed to work was > dwelling the board at reflow for the maximum > recommended amount of time. Would anyone have a
Electronics Forum | Wed Jul 07 11:02:07 EDT 2010 | davef
Rob gave you very good analysis and suggestions for troubleshooting your non-wetting issue. We agree with his sequence of troubleshooting. The following comments are meant to be a line to supplement Rob's plan of attack. This adds to Rob's comment
Electronics Forum | Fri Sep 03 08:19:44 EDT 2010 | rway
Agreed, but his fiducials aren't working so he may have to resort to something a little bigger that returns a more consistent pattern. You are correct, this will provide less accuracy than his fiducials but will save him the expense of cleaning his
Electronics Forum | Sat Aug 21 02:37:56 EDT 2010 | horvath83
What would You recommend? PCB has 5 medium sized lead BGA packages on one side and huge lead - free BGA. On the other side among other elements of course there are 5 big sized lead - free BGA Quad Gigabit Pulse transformers. PCB plating: Ni/Au.
