Electronics Forum | Wed Dec 19 10:21:16 EST 2001 | davef
Crank-up the volume. Look here for a similar discussion http://www.smtnet.com//forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=4735&#Message18380&
Electronics Forum | Fri Mar 07 15:07:50 EST 2003 | davef
YiEng, MA/NY DDave: Usually when the gold plating bath goes south, you loose solderability.
Electronics Forum | Sun Mar 09 19:55:56 EST 2003 | iman
Which specific title books from under your pen, would you recommend for the avid process reader/learner? specific - talking about info/process/data wealth books, and not which books give the most royalties *grinz*
Electronics Forum | Tue Mar 11 12:20:13 EST 2003 | Jim
Look at "Dave's Book Shelf" here: http://www.smtinfocus.com/bookshelf/bookshelf.html
Electronics Forum | Mon Sep 26 16:48:32 EDT 2005 | PWH
Are you using masking? Conformal coat will de-wet (no pin holes usually, though) due to masking tape adjacent to affected areas if the tape glue chemistry isn't compatible with the conformal coat.
Electronics Forum | Mon Apr 28 11:13:21 EDT 2008 | ck_the_flip
Here's a crude wettability test. Take a PCB - both types of finish - print them, and reflow with no components using your standard profile. Observe the wetting spread and flow of the solder paste. This rules in/out that it's PCB solderability.
Electronics Forum | Mon Jul 28 10:58:34 EDT 2008 | davef
Search the fine SMTnet Achives for background discussion on dewetting, like: http://www.smtnet.com//forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=12840&#Message54734
Electronics Forum | Wed Aug 27 15:48:05 EDT 2008 | grics
Again, our paste manufacturer specifies TAL to be 30-60 seconds. Out of curiousity, how would part placement cause de-wetting? I am fairly new to SMT so elaboration would be helpful... Thanks
Electronics Forum | Mon Mar 01 09:17:56 EST 2010 | duso02
Hey....I think it might be the silicone adhesive! LOL Yeah, that'll do it. We use simple Shercon paper dots. Work like a charm. No evidence of "de-wetting".
Electronics Forum | Fri Jul 28 12:16:34 EDT 2017 | dontfeedphils
I'm pretty sure that in the job description of each QA related position it lists "Ensure Process Engineering is always being hassled because you inspect to target and not acceptable."
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