Electronics Forum: solder resist (Page 4 of 48)

Re: solder balling

Electronics Forum | Thu Aug 10 13:16:17 EDT 2000 | Bob Willis

Here is some thing that I wrote a while back on solder beading. First what is a Solder Bead? The term solder bead is used to differentiate it from solder balls. A solder bead is a solder ball but its location is normally constant unlike solder bal

Resistance value level of lead-free solder joint

Electronics Forum | Mon May 26 08:02:11 EDT 2003 | davef

Resistance: Tables of wire gauge often provide a resistance measure of some kind for each gauge. That way we can estimate the resistance of any length of wire we might be interested in. Calculating trace resistance is only slightly more complicated.

how to remove solder ball on PCB

Electronics Forum | Tue Sep 23 07:27:31 EDT 2008 | realchunks

Do not wipe the board at first before putting it in your cleaner. It will leave more paste in your tank, but you won't smear it into every corner of your solder resist. We found that only our stencil cleaner would clean a board properly and leave n

PCB residue after wave solder

Electronics Forum | Tue Aug 04 17:17:17 EDT 2009 | gregoryyork

Certainly does look like solder deposit across the board. Check to see if fluxing correctly. Best way is to hand flux the PCB ensuring you put plenty on. IF you still get the same result then probably down to resist absorbing the flux due to porous r

Hazards of Lead solder fumes?

Electronics Forum | Fri Jun 19 08:08:17 EDT 2009 | patrickbruneel

Stephen, What does the nurse say about lead-free? You can eat as much as you want? You don’t have to wash your hands anymore? Sorry couldn’t resist.

Re: How are your solder balls @ wave solder ?

Electronics Forum | Thu Oct 14 08:01:48 EDT 1999 | JohnW

Gee Dave That's the first time I've ever seen myself listed for a quote! Brian, what your saying is on the whole right, on the surface of it the mask, as long as it's cured properlay shouldn't make a difference but I have to say that I've found so f

How are your solder balls @ wave solder ?

Electronics Forum | Sun Oct 10 17:57:48 EDT 1999 | JohnW

Folk's, I'm just tying up some loose end's on my Master's Thesis on solderballing @ wave soldering and the effect the topography of the mask / PCB has on it. I was wanting to do a straw poll on you guy's as to the type of resist's you are using Glos

Re: How are your solder balls @ wave solder ?

Electronics Forum | Mon Oct 11 13:08:29 EDT 1999 | Dave F

| Folk's, | | I'm just tying up some loose end's on my Master's Thesis on solderballing @ wave soldering and the effect the topography of the mask / PCB has on it. | I was wanting to do a straw poll on you guy's as to the type of resist's you are us

Re: Wave solder of TQFPs

Electronics Forum | Wed Jul 19 20:48:05 EDT 2000 | Dave F

Craig: Waving TSOP should be your last choice. You should resist will high levels of red faced, neck vein bulging seriousness. After you loose: * Philips pads are a good starting point. * Recognize you'll probably have to lay-out the pads on the b

Resistance value level of lead-free solder joint

Electronics Forum | Tue May 27 21:07:41 EDT 2003 | jedduan

Thanks Dave. It's very nice of you. Jed


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