Electronics Forum | Wed Jan 12 13:42:19 EST 2011 | dwonch
Hi All, I'm hoping there is a PCB expert or two hanging around. We're having some solderability issue on our boards. The finish is ENIG but it doesn't seem to be related to the finish process itself. We did SEM and EDX analysis and found aluminum an
Electronics Forum | Tue Mar 25 11:25:18 EDT 2014 | horchak
The first impression I get is that the mask was applied over dirty or contaminated copper. What is the trace and land finish on the PCB? You also appear to have a wetting problem.
Electronics Forum | Wed Dec 08 04:19:16 EST 1999 | pascal MATHIEU
I am working in electronic automotive industry and today we are facing to a very serious problem : if we want to use a PCBoard with a copper thickness of 90�m + fine pitch circuit (0.65mm, 0.5mm) the supplier(several) of the PCB has some trouble t
Electronics Forum | Fri Jul 13 17:00:34 EDT 2007 | jmelson
Oh, sure, on fine-pitch parts you need a microscope or at least a good magnifier. But, OK, you have some kind of contamination. Solder is one thing, but where are these stainless, aluminum and copper particles coming from? Stainless makes me think
Electronics Forum | Fri Jul 13 09:27:15 EDT 2007 | losersk8er
Sorry I have just started working in this industry so I am not as familiar with everything. The probelm is with the Product shorting because of small pieces of metal stretching accross two leads of an IC. This could be a result of faulty equipment?
Electronics Forum | Fri Nov 06 18:40:25 EST 2009 | davef
While you're waiting for others to reply, look here: http://www.smtnet.com/Forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=13874&mc=19
Electronics Forum | Fri Jul 13 09:43:16 EDT 2007 | lococost
wow, never heard of such a thing! Are you sure it's allways different types of material? Are you using a washer that isnt cleaned regular? I would check your product step by step, from bare PCB to finished product to find out where exactly in your
Electronics Forum | Mon Nov 09 10:20:56 EST 2009 | davef
Carol: The thread that I posted above is not directed at your question. I'm sorry that I rushed in responding to you. There was two threads posted recently on the topic and I grabbed the wrong one. Here, try this link for a better response: http://
Electronics Forum | Fri Nov 06 11:39:17 EST 2009 | 14367
As you know, the H1N1 virus is on the move, and we are trying to take precautions. We wish to use a 60% alcohol based lotion for disinfecting our hands. It has been questioned if the added substances could be detrimental to electronic assembly board
Electronics Forum | Tue Mar 25 11:43:48 EDT 2014 | sara_pcb
It is Solder Mask on Bare copper, The land finish is HASL as per MIL-PRF-55110G which accepts trace of HASL as acceptable. Wetting is acceptable. regards, R.Saravanan
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