Electronics Forum: verify and solution (Page 1 of 27)

Frequency to verify the reflow profile

Electronics Forum | Fri Jun 03 04:16:27 EDT 2005 | Bryan She

Background: We use a thermal boards to setup/profiling the reflow oven for pilot run.and then daily verify the reflow profile with this thermal board.Now we phased into LF production,and the LF thermal board can only withstand 25~30 times reflow excu

Conductive contamination and the elusive solution

Electronics Forum | Thu Jul 12 17:52:06 EDT 2007 | swag

Are you talking about problems with your product or your SMT/wave solder equipment?

Conductive contamination and the elusive solution

Electronics Forum | Thu Jul 12 14:46:13 EDT 2007 | losersk8er

I'm new to the website so if I don't sound like I know what I'm talking about I probably don't. But I am having a great problem at work with conductive contamination that bridges two leads and shorts out the IC, causint costly repair. I have been t

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

Conductive contamination and the elusive solution

Electronics Forum | Mon Jul 16 08:42:14 EDT 2007 | realchunks

Hi Scott, Here is another thought. Check your wave solder machine visually. Does the wave flow on both sides of the nozzle? If not, you may have some dross build-up which may be causing your problem. Generally it will only happen on the very fir

Conductive contamination and the elusive solution

Electronics Forum | Thu Jul 12 16:14:20 EDT 2007 | realchunks

Hi Scott, Hard to tell what kind of problem you really have. I guess you need to describe your process first. What kind of process are you using. Wave solder, reflow solder, etc.. What kind of flux are you using to solder with? Vaccum? What ar

Conductive contamination and the elusive solution

Electronics Forum | Thu Jul 12 16:57:46 EDT 2007 | jmelson

Canyou see this contamination? Is it solder beads, flux or something else? If flux, then more cleaning should help, either more time, more cycles through the cleaner, etc. If it is solder beads that are not melted to the rest of the solder, then s

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?

Conductive contamination and the elusive solution

Electronics Forum | Fri Jul 13 11:33:54 EDT 2007 | realchunks

Just starting and already responsible for product quality and machine adjustment? Wow, you poor bastard. Ok, I will assume this problem happens on the bottom side of the board with a thru-hole IC. The short occurs on the side that doesn't have the

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