Electronics Forum | Tue Feb 10 14:02:03 EST 2004 | Maryann
At times the orange peel effect can be from excess flux improperly removed. Our company strictly provides the service of selctive conformal coating application. We quite often see this. Most times if the board is simply "water washed", or IPA washed,
Electronics Forum | Wed Feb 23 10:01:00 EST 2005 | frankracine
Dave, Few questions concerning your Umiseal 1B73. To cure your Acrylic coating do you respect specification ( 2Hrs-170degree F) or you go faster than that? What do you use to cure it? Do you have to clean your nozzles each day or each monday beca
Electronics Forum | Wed Apr 20 08:06:21 EDT 2005 | davef
We'd reject the boards because: * Vacuum seal is punctured. * HIC is expired. One of the nice things about immersion coatings is that the fab can rework the coating. You cannot do that with other coatings. Finally, every HIC that we investigated c
Electronics Forum | Tue Feb 28 07:53:28 EST 2006 | amol_kane
some coatings are more forgiving to surface contaminations than others. best way to go about is select some coatings with the properties you need and then trial the boards to see any coating defects (like dewetting, pinholes, flaking etc) wiping wit
Electronics Forum | Thu Mar 12 10:25:06 EDT 2009 | smt_guy
I have Through Hole Assembly Boards that require Conformal Coating but the customer did not specify which area or parts should not be coated. Upon asking them they are also not sure about it. I have Transformers, PLCC's on a socket, IC's on a Socket
Electronics Forum | Tue May 05 18:00:44 EDT 2009 | suepow
We recently started doing our own Parylene Coating on site. I am looking for some advise on the best way to remove the masking after coating. Is there a document anywhere that addresses this subject? Our fellow doing the coating had only about 2 we
Electronics Forum | Tue Feb 08 17:23:55 EST 2011 | bandjwet
Has someone had really good experience with the softening of silicone conformal coating using a specific chemical? One of our clients just came in with a board with Dow 1502 silicone coating on it. We generally mechanically remove the coating for re
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 | Thu Jul 07 10:07:40 EDT 2011 | duso02
Interesting stuff. I must admit that I am unfamiliar with that product but we use quite a bit of Dow and they are overall excellent silicone coatings. We do nothing but conformal coating here and bubbles are usually from curing to quickly. Without kn
Electronics Forum | Fri Nov 04 13:04:36 EDT 2011 | austinpeterman
I have come to the realization that the root of all of our coating issues stem from one source. We are unable to control the viscosity of our coating. I am ignorant on the subject. Is there a proven method to consistantly produce the identical vis
