Electronics Forum | Tue Mar 14 20:42:24 EDT 2023 | stephendo
In a previous lifetime, we had a selective solder machine where I would see solder splashes in the roof of it. I thought someone might have been putting the solder extremely high. But when it was melting there would be bubbles that burst. The manufac
Electronics Forum | Wed Oct 30 16:05:08 EST 2002 | msimkin
Hi, I have received a report form a board supplier, analysing the reuslts form non wetting problems we have been expereincing with their boards. I assumed it was due to the gold layer being too thin, thus allowing the nicklel layer to be exposed and
Electronics Forum | Thu Oct 31 11:08:12 EST 2002 | soupatech
Being very new to SMT I won't assume I know what the problem is but.... I had lots of air pockets in solder joints, 95% of the boards. Everyone I spoke to thought it was a problem with my process but when one board was sent to our supplier they admi
Electronics Forum | Tue Mar 01 15:33:35 EST 2011 | jlawson
If I assume you running a selective coating machine ? Maybe you have small leak and system is sucking in air creating bubbles in mixture, like a sort of venturi action, just idea, can be a faulty fitting , elbow etc. Have had this before....
Electronics Forum | Tue Jan 24 19:00:15 EST 2006 | MikeF
Graham Naisbitt is definitely an expert on conformal coating, he has posted answers here for years. Check your material to see what the cure mechanism is. Most urethanes need moisture from the air to cure, the higher the relative humidity the faste
Electronics Forum | Mon Jul 04 14:21:14 EDT 2011 | davef
The three primary causes for bubble generation in solvent-based coatings are: * Air entrapment * Solvent flash-off * Curing the coating too quickly Tell us more about your process including: * When you first notice the bubbles * Extent of the probl
Electronics Forum | Sun Jul 26 07:52:35 EDT 2020 | sync40
Hello to everyone, Have you ever experienced soldermask bubbles inmediately after printed the soldermask itself? (for screen printing method of LPISM). I am not talking here about blistering or any outgassing defects after exposing to high temperatu
Electronics Forum | Wed Jan 17 12:10:47 EST 2018 | guilherme_castro
I have the follwing problem in our proccess we have to many problem with via hole and trought plated holes like voids air bubbles . During the eletricial test process our machine is not detecting this problems , the voids and air bubbles How
Electronics Forum | Wed Apr 07 13:02:05 EDT 2004 | Marco Serrano
Had anyone experienced air bubbles inside of the Loctite glue syringes? If any of you do What have you done to rid off this problem? Thanks in advance!
Electronics Forum | Wed Apr 07 14:12:53 EDT 2004 | Paul
The easiest way to remove air bubbles from any fluid is to place it into a vacuum chamber. I do this almost daily with liquid rubber coatings, glues, and plastics.
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