Electronics Forum | Thu Mar 31 19:52:50 EST 2005 | davef
We agree with Russ that you're talking palladium instead of platinum. Your wetting problem likely is not the Pd-Ag surface layers, but the underlying metal or nickel to which you need to wet. Either a base metal is: * Contaminated and poorly wettabl
Electronics Forum | Wed Apr 06 21:37:35 EDT 2005 | KEN
Are you saying you have solder balls (as in solder paste balls) at the lead tips (or land tip)? This means your thermal profile is not hot enough. why the sudden cahnge? I will bet the lead frame material was copper and is now alloy 42. sounds like
Electronics Forum | Wed Apr 13 18:28:21 EDT 2005 | RT
We have a situation where our customer returned a device (BGA) with a missing solder ball. The process is Copper-Nickel-Gold-Solderball. EDX revealed that no trace of gold nor solder material (lead-free balls). Could poor Au plating/adhesion cause
Electronics Forum | Thu Apr 21 12:35:15 EDT 2005 | jdumont
Well that doesnt sound very promising. What im going to do is make sure these two boards I just coated (with the RTV already cured) will be used in house only. In the future we will do any conformal coating operations before potting with whatever mat
Electronics Forum | Mon May 23 23:21:18 EDT 2005 | magkel
HI guys, I am new to this forum, Earlier author is asking regarding of Lead free rework. 63-37 is non lead free and this will contaminate the product itself. I do not know what are the components that you are facing to rework with. But try to set th
Electronics Forum | Wed Apr 27 20:55:10 EDT 2005 | KEN
One thing that may have been over looked: Not all solder pastes are created equal. Period. The best way to avoid these situations is to characterize you material (and your process). The fact is you could try every aperture shape under the sun....a
Electronics Forum | Mon Jul 03 22:48:42 EDT 2006 | eyryren
Dear ve7khz We are the manufacturer of SMT accessorial material.stencil clean roll and splice tape.We are can manufacture many style stencil clean roll for kinds of screen printer machine and splice tape special for kinds of placement machine. If yo
Electronics Forum | Tue May 31 21:39:46 EDT 2005 | davef
We not sure what your supplier means either. So, maybe it's worth a follow-up call. One possibility is: The HASL could be lead-free as easily as it could be SnPb. You probably need to think about how you're going to change your reflow recipe to in
Electronics Forum | Tue Jun 21 07:39:23 EDT 2005 | davef
There's a fair amount of material on cooling rates for lead free on the web. Look here: * http://www.speedlinetech.com/docs/Cooling-Slopes-Lead-Free-Reflow.pdf * http://www.findarticles.com/p/articles/mi_qa3776/is_200412/ai_n9473486 * http://www.m
Electronics Forum | Fri Jun 17 23:31:12 EDT 2005 | kenscj
Hi all, currently, we are seeing BGA problem like solder ball misalign, void, solder short (all under BGA, tested with 5DX), after reflow. We examine the solder ball (raw material of BGA), and see that the ball surface is not smooth, will that affe
