Electronics Forum | Mon Apr 25 02:25:32 EDT 2005 | Mike Konrad
The issue of using ultrasonic technology for post reflow de-fluxing presents challenges in two categories: Controversial: Although there are recent studies that indicate acceptance with ultrasonic technology on populated assemblies, there remains si
Electronics Forum | Wed May 05 09:00:53 EDT 2010 | davef
IPC-A-610D Sections 3.1, 3.2, and 3.3 and Table 3.1 specifically mention compressed air as a source of ESD damage
Electronics Forum | Tue Feb 01 07:50:25 EST 2000 | Jason Bentley
This all depends on the mixture of your solder. If you are using water soluable flux then it will get clean. But not alcohol based flux. As for using the ultrasonic this might be a problem I personally have never heard of someone washing a board in a
Electronics Forum | Mon Apr 25 16:25:07 EDT 2005 | Mike Konrad
Hi Carl / Bill, I seem to miss your point regarding disclosure. As I CLEARLY stated, it is the perception of damage more than the possibility of damage. As a twenty year veteran of de-fluxing systems, I can assure you that there remains enough con
Electronics Forum | Wed Apr 27 23:23:18 EDT 2005 | pdeuel
It was a resonant frequency that brought down the Narrows bridge. Memorex can shatter a wine glass with resonance. Ultrasonic washers use frequency to do what they do. If anything on the pcb has a length width or mass that resonates at the washers fr
Electronics Forum | Tue Feb 01 12:02:56 EST 2000 | Mike Konrad
Your question may be answered in two parts. First, if you are using a water soluble (OA) paste, then water is an excellent �solvent�. Water, in one way or another, is used to clean all fluxes and pastes from PCB�s. In some cases, a chemical is add
Electronics Forum | Tue Feb 01 14:03:16 EST 2000 | Bill Schreiber
When cleaning water washable flux from PCBs using U/S, the final rinse can be with spray DI water for aesthetic purposes because the wash cycle is really just a long U/S rinse (no added chemistry). Fresh DI water should be continuously added to fresh
Electronics Forum | Tue Feb 01 21:48:12 EST 2000 | Dave F
Guo: You want to know: 1 Can I use water as the solvent in an ultrasonic machine to remove solder paste from PCB? Continuing from Jason�s comments: Sure you can use water as the solvent to remove solder paste from PCB, but recognize that some flu
Electronics Forum | Fri Jul 28 12:13:38 EDT 2017 | dontfeedphils
Ironically enough, inline wash system belts work well for placing on top of small assemblies inside wash basket to avoid bouncing around like you've seen. This of course assumes you have access to an old belt like that. Point being, try to find som
Electronics Forum | Wed Sep 22 17:14:49 EDT 2021 | swilson
Hello while washing SMT boards can unsealed switches and transformers be washed and/or will the wash solution damage the component down the road? Normally I leave them off and add them after wash just want to know if there is anyway possible to get t
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