Electronics Forum: acrylic and coating (Page 1 of 21)

defect on PCB acrylic conformal coating

Electronics Forum | Wed May 08 14:24:22 EDT 2013 | wahahasteven

we are using acrylic conformal coating on the PCB. Under the same program, same parameters (not changing anything on the machine), and we always found one or two boards have some spots which are not coated (shown as picture). The location of the spot

defect on PCB acrylic conformal coating

Electronics Forum | Wed May 08 20:14:24 EDT 2013 | davef

What happens when you rework those non-coated areas? Please list your rework steps Br, davef

defect on PCB acrylic conformal coating

Electronics Forum | Thu May 09 10:12:08 EDT 2013 | wahahasteven

this is one of my project. I have tried to remove coating only on those areas with alcohol and thinner, then program the machine to coat the removed area again. But the result obviously shows that two different tones of coating on the board. I also

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

Mixing conformal coating and RTV

Electronics Forum | Thu Apr 21 11:43:03 EDT 2005 | davef

We understand the problem of trying to coat over RTV. We have seen the same problem with acrylic and urethane coatings not wanting to stick to RTV. Some acrylics seem to be worse than urethane. Since this is a new product, may be you could pot your

Conformal coating mask dots and halos

Electronics Forum | Fri Feb 26 10:42:56 EST 2010 | mleber

Your masking dots are a silicone adhesive. Contact the supplier and tell them you need an acrylic adhesive on the same dots. Normally same cost and lead time.

Conformal coating mask dots and halos

Electronics Forum | Thu Feb 25 10:21:49 EST 2010 | jdumont

My guess would be that the adhesive used on the dots contains silicone. We use 1B73 which is also acrylic and it hates silicone. We use silicone RTV to permanently mask around some connectors and unless its fully cured before coating it will cause l

conformal coating

Electronics Forum | Thu Apr 16 10:13:32 EDT 2015 | charliedci

Anyone aware of an acrylic conformal coating that is UV curable?

Conformal coating

Electronics Forum | Thu Jan 29 16:30:04 EST 2004 | blnorman

What conformal coating are you using - silicone, acrylic, urethane?

Conformal coating

Electronics Forum | Mon Feb 02 06:55:13 EST 2004 | Sam

The Type we predominntely use is Acrylic, but we also get this problem when we use silicone or urethane. Sam.

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