Electronics Forum: copper and pcb and contamination (Page 1 of 8)

Aluminum and silica contamination

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

seperation of soldermask and pcb

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.

Fine pitch and thick copper

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

Conductive contamination and the elusive solution

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

Conductive contamination and the elusive solution

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?

H1N1 Hand Sanitizers and PCB contamination

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

Conductive contamination and the elusive solution

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

H1N1 Hand Sanitizers and PCB contamination

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://

H1N1 Hand Sanitizers and PCB contamination

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

seperation of soldermask and pcb

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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