Electronics Forum | Thu Jun 26 10:02:06 EDT 2008 | rdnggbsss1
I am a PCB Designer and I have to put a note on the assembly drawing to tell the assembler how to clean the board. This is new to me. Here is a sample note. Can someone give me some feedback on it? "Use water washable, no clean solder paste for t
Electronics Forum | Wed May 19 11:28:44 EDT 1999 | Martin Benites
Hi everyone. My name is Martin Benites from LIma, Peru. I am actually working on a project for automate PCB assembly process in our industry. Actual process is hand-based, thus our startpoint is zero equipment. I have already asked some companies fo
Electronics Forum | Thu Jun 26 13:55:56 EDT 2008 | dyoungquist
Water will not remove no clean flux residues because they are not water soluble. Solder paste with no clean flux should only be used when the assemblies do not need to be cleaned. That said, you can buy special cleaning solvents specifically for re
Electronics Forum | Thu Jun 26 12:53:54 EDT 2008 | dwelch123
Tell your assembler they shouldn't wash no clean paste,they will have to use a part stretcher to get parts to fit back on pads!!!??????????????
Electronics Forum | Mon Jul 23 18:42:50 EDT 2001 | johnmaetta
We are currently re-thinking our policy of no-clean and would like more information from users of both process'. Our assemblies exhibit residue and other 'contaminates' and this raises questions at our customer sites. Thanks, John
Electronics Forum | Thu Jul 26 13:31:52 EDT 2001 | Hussman
John, Are these spots the result of repair? I notice a lot of repair people love to squirt flux onto the board when they repair it.
Electronics Forum | Sun Jul 29 09:22:54 EDT 2001 | davef
Tough to say. The residues from fluxes vary according to the suppliers' forulations. Consider: * Talking to your supplier. * Running life cycle tests.
Electronics Forum | Mon Jul 23 20:28:17 EDT 2001 | davef
We run both NC and OA flux, although the majority of our product is run on OA. For application not requiring uBGA, we find the benefits of NC elusive, at best. What? .... Your customer recognizes that initially the NC res in non-ionic, but sticky.
Electronics Forum | Wed Jul 25 09:08:19 EDT 2001 | caldon
Our July 2000 empfasis article has a residue topic available for down load. http://www.empf.org (look under empfasis). Also, there are tons of Tech Pubs information available for down load via our web site as well. Caldon W. Driscoll ACI USA 610-36
Electronics Forum | Tue Jul 24 20:16:13 EDT 2001 | davef
We don't believe that water is thin enough to clean a uBGA. Given your telecom biz, what cleanliness standard do you use? How do you measure it? And how often do you check it? What are your in-bound materials cleanliness standards? [Oooo, I gues
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