Electronics Forum | Fri May 26 04:58:19 EDT 2023 | auriga2001
I agree with the two other replies. Left alone, it is a defect. If it's just excess adhesive or coating, you can use IPC-7711/7721 'Rework, Modification and Repair of Electronic Assemblies' for guidance on removing. Section 2.3.1 explains how to te
Electronics Forum | Thu Jul 18 21:56:40 EDT 2002 | computer
Hi Dave, I read the same article as you. But that method leaves solder balls in via holes or traces of it remains on the boards. I am using ultrasonic with solvent for cleaning misprint boards. Apprarently, they have adverse affect to the en
Electronics Forum | Tue Dec 14 09:53:03 EST 2004 | paul_fisher
Yep fully functional and failed during the test. 25 to 55C in 3 hour hold for 9 hours then 55C to 25C in 3 hours hold for 9 hours then repeat. Humidity at 95 percent! Boards only part conformally coated. Growth with and without the coating. seems to
Electronics Forum | Tue Feb 18 11:47:50 EST 2014 | rgduval
Is there a reason you're considering bead-blasting the conformal coating? It seems like a bit of overkill. Most of the cc that I've used over the years either has a solvent that will dissolve it, or will dissolve with heat. Heat has been our go-to
Electronics Forum | Tue Apr 20 17:56:42 EDT 1999 | Chrys Shea
| | I am wondering if anyone has any info regarding solder paste misprint clean-up procedures for Entek Plus CU-106A PCB's utilizing a water-clean solder paste. In a implementation procedure they recommend a 2-3 minute wash cycle with the following
Electronics Forum | Tue Nov 04 10:21:40 EST 2003 | blnorman
One of the requirements for our components and PCBs is fluid compatibility. They are tested by a 30 second immersion in the applicable solvent/cleaner/fluid, then they are tested for functionality and degradation.
Electronics Forum | Tue Jan 10 14:34:40 EST 2006 | Amol Kane
arent there environmentally friendly solvents (i have seen some from 3M) that can be used in a vapor degreaser. i was also planning to use the vapor degreaser to clean boards prior to conformal coating
Electronics Forum | Mon Jul 23 16:17:19 EDT 2007 | mleber
We have not had the best of luck with wet film. I agree on your statement. Depending on the mix and amount of solvent your results will vary. We were looking for something easy, accurate and foolproof.
Electronics Forum | Tue Feb 03 13:47:59 EST 2009 | grics
I would also suggest looking at your ramp rate in the cure oven. We noticed that accelerated heating increased the "gas out" of the solvent. We run 1A33 and and do not exceed a .5/degC ramp rate.
Electronics Forum | Tue Dec 08 17:55:51 EST 1998 | Dave F
1. What is the best way to remove polyurethane conformal coating from selected areas? Your conformal coat material supplier is best equipped to tell you how to remove the coating. Polyurethane conformal coating is not easy to remove. Without in-pu
