Electronics Forum | Thu Jul 12 10:32:59 EDT 2001 | Hussman
Wow, what a string of answers and nobody brought up the easiest way to eliminate solder balls. Yes, the paste being squished under the part does reflow and work it's way out to the side during reflow. I did a 5 week study on this (when I was a bori
Electronics Forum | Sun Aug 15 05:45:15 EDT 1999 | Brian
Boca, Dave Sorry, but I cannot let this go. I'll go along with you that, at the time that the Montreal Protocol was initially signed (September 1987), there was no scientific proof that CFCs etc. were causing ozone depletion. There was, however, ve
Electronics Forum | Thu May 03 12:59:55 EDT 2018 | donnie15
Our customer is asking for a solder ball dispersion test on our string solder for rework. The do not provide a test spec, only the attached diagram? has anyone seen this before? It looks like just pushing the solder against the iron and counting th
Electronics Forum | Fri May 04 10:10:18 EDT 2018 | donnie15
Thanks for your response, I changed the attachment to a PDF. It will be easy enough to set up if we need to do this. I was hoping the test was a little more formal and documented but quick and dirty evaluation have their place as well.
Electronics Forum | Mon Aug 16 16:57:06 EDT 2004 | Shean Dalton
Try to observe the board as it exits the wave, look for solder snapping as the leads finally exit the solder. The surface tension could be such that a "string" of solder stretches away from the wave until it finally breaks. Then, as the string reco
Electronics Forum | Wed Mar 02 09:28:02 EST 2005 | bobsavenger
I am looking for images of solder paste defects like Past stringing, paste gorging and dog ears. I would also like to have the avi file to show how tombstoning happens in the reflow oven. Thanks Bob
Electronics Forum | Fri May 04 16:19:52 EDT 2018 | solderingpro
meaning its non-eutectic. You would want to stay as close to 350°C as possible or (if a slightly off version of SAC305) target the highest melting point of your chemistry) - assuming your temp controller is properly calibrated that is. Other option
Electronics Forum | Thu May 03 15:02:59 EDT 2018 | solderingpro
Bob Willis (was the first I knew of) that has a splatter test that can be performed over a ceramic hot plate or the like. The concept is pretty straight forward, using a zoned circle, users can introduce the solder wire at a consistent rate and coun
Electronics Forum | Sat Mar 30 17:27:45 EST 2002 | davef
You should not have glue "all over the place." Tou should not have glue on solderable surfaces. It sounds like you are stringing glue from one dispense location to the next. Search the fine SMTnet Archives [there might be something there]. Read a
Electronics Forum | Wed Jul 11 18:42:35 EDT 2001 | Darby
As I mentioned in the previous string we are happy with Electrolube "SSS". The guy who built our ulrasonic cleaners recommended it and it works very well. You don't have to change tanks or machines for a switch from paste to adhesive. It doesn't leav
