Electronics Forum | Fri Jul 30 20:11:35 EDT 1999 | Mike Konrad
It is true that the use of saponifiers (and other water soluble additives) will lower the surface tension and aid in under component penetration. It is also true, however, that other specific design features within a batch machine can also aid in un
Electronics Forum | Thu Mar 25 18:54:16 EST 2004 | Mike Konrad
A surfactant (AKA detergent) is great for OA flux removal applications. It has a good surface tension reducing property and is more easily rinsed than soaps. If using a soap or surfactant, be sure that you choose one that has a good de-foaming pack
Electronics Forum | Thu Aug 26 21:54:57 EDT 2004 | KEN
I ran into this about 2 years ago. The Rework Operators (all 3 shifts) would rework a device, rince the board with tap water (yep, 50k / Cm^3) from a nearby sink, then send the PCB to test (which is really ironic as they had to walk past the DI wash
Electronics Forum | Tue May 29 22:07:42 EDT 2001 | Robert Sykoh
OA stands for Organic Activated. In the good old fo SMT processes, a lot of different fluxes are being considered. RA, RMA, OA, etc. If you look at the present no-clean paste, it is actually RMA.
Electronics Forum | Sat Nov 21 08:52:22 EST 2009 | davef
Patrick: The flux was OA, but you can get the same result with low residue flux.
Electronics Forum | Thu Jun 24 14:36:45 EDT 1999 | Bob Barr
We are anticipating switching from RMA to OA flux for both reflow and wavesolder in the next few months. If you use a batch cleaner running DI water only I would like to hear your experiences. How is it for cleaning under low standoff components li
Electronics Forum | Mon Dec 10 13:56:51 EST 2001 | slthomas
1) The additional activity of the OA flux probably took care of the oxydation. How do you plan on taking care of the presence of conductive and corrosive residues from it now, though? You're not supposed to wash those parts with water. 2) The tomb
Electronics Forum | Thu Oct 03 15:14:46 EDT 2002 | SMTGuy
Good Day Everyone, Can anyone offer any advice on 0201 aperture design? We are looking at an application that will require them. We would like to do some experimentation first. Also, assuming an OA flux, would we need a type 4 or 5 powder paste to p
Electronics Forum | Thu Apr 10 20:57:03 EDT 2003 | Ray Chartrand
I've also seen "as received" defective devices. A tier 1 EMS I was working with put down an entire shift worth of these devices before it was noticed. Their rework costs were $$$. Just goes to prove that there's no free ticket and when bean counters
Electronics Forum | Wed Apr 21 21:27:11 EDT 2004 | davef
Dreamy "Ball rolling"? Are you a bowler? My nephew does the audio for the ESPN2 production of the professional bowling tour. Search the fine SMTnet Archives for discussion on assessing cleaning machines. For instance: http://www.smtnet.com/forum
