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.
Electronics Forum | Thu Aug 27 08:34:50 EDT 2009 | floydf
I am having trouble with little air bubbles in my conformal coat. It ranges from a few pin sized bubble to looking like spit. We are using Dow 2620 silicone conformal coat applied with a PVA sprayer machine. The conformal coat comes in bladder bags t
Electronics Forum | Fri Oct 09 16:07:30 EDT 2009 | dlabelle
We use Dow 2620 silicone conformal coat applied with PVA1000 sprayer machine. If used on a daily bases, we have no problem. If we let the machine sit idle for over a week, we will get bubbles in the conformal coating. Sometimes, purging the line w
Electronics Forum | Thu Feb 21 16:57:02 EST 2008 | flipit
If the vias are large and don't always tent, you can have your pcb supplier double mask the pcb. I do this for COB assembly sometimes because the globtop wicks through the vias and also causes air bubbles in the globtop.
Electronics Forum | Fri Sep 21 17:33:01 EDT 2018 | michaelszuch
Hello Hai, The first step is to determine where in the process the bubbles are being generated - either during coating or during curing. You can easily check this by letting a few boards air dry (no oven) and comparing them to the oven-cured ones. I
Electronics Forum | Tue May 23 15:01:24 EDT 2000 | A. Marques
Hello, I think the problem can be: 1.�- some humidity in the adhesive, 2.�- some bubble of air in the adhesive when you cured the adhesive some humidity will go evaporate and when you make the soldering the same soldering will make a bridge between t
Electronics Forum | Thu Jan 18 17:26:30 EST 2018 | davef
I'm aware of no electrical test for detecting voids and air bubbles. If someone was x-raying my boards and saw voids and air bubbles and they weren't happy about it, first thing I'd do is convince them that the boards a within standard. You know some
Electronics Forum | Tue Jun 26 16:07:12 EDT 2018 | eduszapata29
Minami vacuum reflow is easy to maintain air tightness, and oxygen can be reduced to 50ppm or less by filling N2 gas. And generation of oxide film can be suppressed, and production in low oxygen environment is possible. In addition to the air tightne
