Electronics Forum: solder and fractures and conformal and coat (Page 1 of 2)

silicone conformal coat and electrical contacts

Electronics Forum | Mon Jan 29 20:25:24 EST 2007 | davef

We allow no silicone in our shop, because they ruin solderability.

silicone conformal coat and electrical contacts

Electronics Forum | Tue Jan 30 14:12:12 EST 2007 | blnorman

We use nothing but silicones and have for at least the last 7 years. We don't have relays, but we do have motors. No issues with soldering, but our lines are constructed such that the last solder operation is a good distance from the coating or pot

silicone conformal coat and electrical contacts

Electronics Forum | Tue Jan 30 18:34:56 EST 2007 | realchunks

Hose and/or Dave, Please elaborate of how the silicone can affect soldering. Material itself or fumes?

silicone conformal coat and electrical contacts

Electronics Forum | Wed Jan 31 14:07:24 EST 2007 | electronhose

Material, fumes, cured or uncured, all are suspect. Silicone gets on an operator's hands, that operator handles components ( even a day or more later ) silicone is transferred to the solder connections = contamination. Process and workcell control

silicone conformal coat and electrical contacts

Electronics Forum | Wed Jan 31 17:01:34 EST 2007 | rw

I'm not that concerned about the solderability of the motor. Our customer is concerned about the outgassing of the conformal coat effecting the motor brushes. Silicone will break down into SiO2 and SiC will result from a spark between the brushes a

silicone conformal coat and electrical contacts

Electronics Forum | Fri Jan 26 16:47:35 EST 2007 | electronhose

IMHO I would avoid sprayed silicones like the plague. They can travel around your facility and cause solder wetting issues that you will never know the root cause for. Also found this e-drive article on using silicones around motors and relays. Loo

silicone conformal coat and electrical contacts

Electronics Forum | Tue Jan 30 20:38:32 EST 2007 | davef

NASA Internal Advisory: NASA-Issued Return to Flight Wristbands Contaminated with Silicone [snip] 10. PROBLEM DESCRIPTION: Recently we have been made aware of a silicone problem associated with the "Return to Flight" wristbands. These wristbands are

Solder Balls and conformal coating

Electronics Forum | Fri Apr 05 16:31:55 EDT 2019 | slthomas

Never heard of such a thing. Are you sure the coating isn't just making the solder balls more prominent? Where are the "new" solder balls appearing after coating?

Solder Balls and conformal coating

Electronics Forum | Fri Apr 05 15:24:14 EDT 2019 | sever_83

What can cause solder balls to appear after conformal coating? Using Dymax 9-20557, light curing for 1.5 mins. Can too much heat from light cure cause solder balls?

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

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