Electronics Forum | Fri Sep 20 08:45:27 EDT 2019 | bukas
hello, I have been experiencing a strange solder defect lately. hope some of you may know what is causing it. it happens on same side of processor and there has been no changes in soldering process.
Electronics Forum | Sun Sep 22 23:23:39 EDT 2019 | sssamw
Yes, no wetting on the several leads, to verify is same location of the leads? Looks PCB/IC leads wetting issue, a process contaminated or raw material issue. A cross experiments to verify the potential cause is needed.
Electronics Forum | Fri Sep 20 17:43:03 EDT 2019 | deanm
Looks like poor wetting/solderability to me. I don’t see heel fillets on the leads where the solder balls up. The solder has to go somewhere. It won’t flow where it won’t wet. Try printing a bare board and run through reflow. If the solder balls up o
Electronics Forum | Sat Mar 16 11:06:48 EST 2002 | Lau
Hi, I am searching a method of reflow process for less / nothing solder ball defect. Thank Lau
Electronics Forum | Tue Mar 19 09:29:08 EST 2002 | Basaran
What type of solder ball defect that you want to avoid is it voids or misregistration or ball-pad adhesion. Cemal Basaran
Electronics Forum | Sat Mar 16 17:53:06 EST 2002 | davef
Not an unusual problem, especially for nc flux users. Search the fine SMTnet Archives for background.
Electronics Forum | Wed Mar 20 11:21:57 EST 2002 | Hussman
It's all in the way you design your stencil.
Electronics Forum | Wed Dec 17 17:09:03 EST 2003 | Gabriele
Clean or No Clean Solder Paste
Electronics Forum | Mon Dec 22 12:41:17 EST 2003 | Marc Simmel
No clean solder paste. One further observation ... the parts have a metal shell and are 'floating' high on the paste. Though there is wetting on the metal shell, it doesn't seem to sink as far as it should and this could be lifting the soldertails f
Electronics Forum | Wed Dec 17 16:19:42 EST 2003 | swagner
How long are the OSP boards out of there packaging? Is this a double sided smd process or single? Are the boards stored in nitrogen? Sounds like an osp issue to me!
