Electronics Forum: conformal coating white residue (Page 1 of 11)

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

conformal coating over inspection stamps

Electronics Forum | Thu Jun 27 08:47:21 EDT 2019 | SMTA-John

Having success with Circuit Boards #432 Solvent Resistant Ink - Designed specifically for circuit boards. This medium dry ink is highly resistant to solvents .... It is also non-conducting. Note: this ink contains an aggressive solvent so should not

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

Bubbles on solder joint(after conformal coating curing)

Electronics Forum | Thu Nov 19 22:48:22 EST 2009 | davef

Since the bubbles: * Are only on the solder connection, we'd guess there must be some compatibility issue between the flux residues and the conformal coat materials. * Occur after curing, we'd guess the cure recipe is too rapid and is entrapping voli

Bubbles on solder joint(after conformal coating curing)

Electronics Forum | Sun Nov 22 19:59:26 EST 2009 | prodivegsr

Hi Davef, The bubbles occurs at the body also...there's also a washing process before the conformal coating:-the Flux residue are removed after washing. ... The curing profile is also something that we are looking into during the initial troubles

Bubbles on solder joint(after conformal coating curing)

Electronics Forum | Tue Nov 24 05:23:18 EST 2009 | prodivegsr

Hi Davef, Thanks...Saw 1 of your thread that you posted : Thanks for providing... From davef : There are many possibilities: * Conformal coat is incompatible with surface residue on the board * Conformal coat is incompatible with solder mask on the

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

Adhesion of conformal coating to plastic components

Electronics Forum | Tue Jun 02 14:32:58 EDT 1998 | Chris Fontaine

We have experienced poor adhesion of acrylic conformal coating to plastic bodied IC�s. The observed symptoms of this are a blistering or lifting of the coating at the surface of the component, although peel testing has revealed that this is not alwa

Humiseal 1A33 conformal coating using automated atomized spray

Electronics Forum | Tue Jul 03 01:54:42 EDT 2018 | rdhiman1

Reaching out to all conformal coating experts, please help! While setting up conformal coating using the automated atomized spray, we observing issues associated with conformal coating wetting on the following regions: 1) Component edges 2) Metalli

Re: Adhesion of conformal coating to plastic components

Electronics Forum | Tue Jun 02 15:53:32 EDT 1998 | Earl Moon

| We have experienced poor adhesion of acrylic conformal coating to plastic bodied IC�s. The observed symptoms of this are a blistering or lifting of the coating at the surface of the component, although peel testing has revealed that this is not al

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