Electronics Forum | Fri Jan 07 03:04:12 EST 2005 | Deepak Mudliar
Following are my queries : 1. How actually the process of electrofoam Stencil preparation? 2. How N2 Helps for Leadfree soldering ? 3. Does Ultrasonic Cleaning process affects the internal bonding of IC ?
Electronics Forum | Thu Mar 17 22:14:42 EST 2005 | Chua
Hi Davef, Thanks for your advise...... We are running no-clean process. If there is white residues after few days.....is it cause by those excess flux. Thanks
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 | Sat Sep 26 19:09:17 EDT 1998 | Graham Naisbitt
As an addendum to Daves posting, please consider that: There is no such thing as no residue fluxing. A no-clean must herefore, have benign residues - in other words, they are not as efficient at removing surface oxides to enable good solder joints. S
Electronics Forum | Thu Sep 24 10:19:55 EDT 1998 | Dave F
| i am working on a no-clean process implementation project in a company. i want to change a board to no-clean which had dendrite problems underneath the small resistors on the bottom side(in smt).i want more information on the exact cause of dendrit
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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