Electronics Forum: conformal coating no clean} (Page 1 of 20)

Is conformal coating necessary?

Electronics Forum | Thu Mar 08 01:19:16 EST 2001 | Mike Moninger

The environment essentially defines the need for coating. "Inside" may mean inside a men's locker room with attendant high humidity or inside a climate-controlled clean environment. Conformal coatings offer protection against moisture, fungus, chemi

Problem with conformal coating

Electronics Forum | Wed Feb 23 22:38:28 EST 2005 | davef

We: * Cure 1B73 according to spec in a heat box, like a Blue-M * Clean nozzles [one set in use, one set being cleaned] in thinner in a bronson ultrasonic cleaner * Haven't evaluated coatings in years, but would do it according to J-STD-001C, Reqmnts

Problem with conformal coating

Electronics Forum | Thu Feb 17 15:01:23 EST 2005 | davef

We're not familiar with your DYMAX #984-LVUF. The problem is not with your conformal coating. The problem is with your 0805 [and not all of 0805, probably just those from a specific supplier]. This lack of coverage of components is called dewetting

Un-cured conformal coating

Electronics Forum | Wed Oct 27 13:20:47 EDT 2004 | DavidB

We are producing boards with Alpha 591S RMA No-Clean paste and are coating after SMC with Dow silicone ( toluene solvent based) conformal coating. We have experienced several failures due to soft shorts ( electrochemical migration?) We have also obse

Problem with conformal coating

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

Problem with conformal coating

Electronics Forum | Sun Apr 10 03:25:35 EDT 2005 | Peter

Normally, some conformal coatings do not have very good wetting properties, that should be basic function of a good coating material (the same reqirement as avoid bubbles during coating process)! For UV curing conformal coatings, you can try Lackwe

Simple conformal coating machine

Electronics Forum | Fri Sep 11 12:08:10 EDT 2015 | derrikf

I built one using an old Asymtek Automove. When all was said and done, it cost less than $400, including what was paid for the machine itself. It's a very basic setup, (air over syringe), but for our needs it does everything and more. With air to syr

Solder Balls and conformal coating

Electronics Forum | Mon Apr 08 14:16:29 EDT 2019 | sever_83

We've never heard of seen of such a thing either. We tried a clean sample board and applied con coat. Same process through out and we saw nothing. After speaking with the original operators who was curing the boards he had left the boards much longer

Bubbles on solder joint(after conformal coating curing)

Electronics Forum | Fri Dec 18 09:27:51 EST 2009 | sforman1

Tom: Once again - why are you using solvent based conformal coating. 1B31 is OK as a CC but it contains Toluene and MEK!! It is only 35% solids which means you are trying to get rid of 65% solvent. If you must use it due to customers requirement then

defect on PCB acrylic conformal coating

Electronics Forum | Thu May 09 13:49:24 EDT 2013 | davef

First, it appears that your solder mask and your coating material appear to be incompatible. Second, IPA leaves a residue that's probably not compatible with your coating material, either. IPC-HDBK-830 - Guidelines for Design, Selection and Applic

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