Electronics Forum | Sat Jul 25 08:47:25 EDT 2009 | davef
Both "moisture content of bare board" and the "thickness of the copper plating in the PTH" are related to each other. As you heat the solder connection, moisture in the board boils and out-gasses through the solder connection. Plating with the proper
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 | Sun Nov 08 15:27:25 EST 2015 | davef
Thinner: Flux thinner, NOT paint thinner We kept a spare stone in thinner in inventory. We cut PVC pipe to size, cap in one end, screw thread on the other, stone inside, filled with flux thinner and covered with a screw cap. I don't remember who we
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
Electronics Forum | Fri Jan 29 11:23:54 EST 2010 | ppwlee
Smtnet, I am looking at pros and cons for automated soldering. The application is a simple multi pin through-hole soldering on a high volume manual assembly line. The goal was to eliminate defects associated with missing solder pins which goes undet
Electronics Forum | Mon Aug 14 13:21:48 EDT 2023 | calebcsmt
the implication being the soldermask is too thick, raising the top of the board higher than the pads themselves (eliminating gasketing)? Essentially, the board isn't perfectly planar would be the subject of cause it sounds like?
Electronics Forum | Thu Jan 24 19:58:58 EST 2002 | davef
for regular eutecticish solders, keep the pot temperature between 230�C [446�F] and 290�C [554�F]. If you polled us on our pot temperatures, we�d be all over the map, but with more lower than higher than you. High pot temperatures tend to generate
Electronics Forum | Wed Jan 09 14:52:53 EST 2002 | Chris
Hi, I have read many articles about theromsonically bonding to soft gold. Many of these articles state you can bond to 10uinches of gold. I have worked with both Hughes and Panasonic bonders at two different companies and I have never been able to
Electronics Forum | Thu Mar 23 12:11:20 EST 2006 | patrickbruneel
Here's a (427 page) EPA report on Solders in Electronics: A Life-Cycle Assessment http://www.epa.gov/opptintr/dfe/pubs/solder/lca/lfs-lca-final.pdf If you look at page ES-16/table ES-4 and ES-5 it appears that SAC alloys have a higher impact on the
Electronics Forum | Thu Dec 16 14:51:15 EST 2004 | blnorman
It's driven by those highly technically astute politicians in Europe. IPC has a lead-free forum you can subscribe to and almost to a person in the forum agrees that elimination of lead in solder is assinine. From the automotive end of electronics
