Electronics Forum | Mon Feb 06 17:24:26 EST 2017 | westshoredesign
So I had the same question too when I was setting ours up. My lazy (and cheap) solution was: for each program I have a universal path that is used up to the first dispense instruction and after the last one then I covered the surfaces underneath tha
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
Electronics Forum | Fri Oct 29 09:08:21 EDT 2004 | davef
Electrochemical migration under conformal coating: That's possible. Very few conformal coatings are water resistant. So, if you have ionic material on your board, standback. Uncured material under several IC: Materials like yours need moisture fro
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
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
Electronics Forum | Tue Feb 18 13:08:05 EST 2014 | hegemon
Paralene, Paraxylene, or other vacuum deposited coating will require this method to remove the coatings. UR and Acrylics have solvents, as Rob above has mentioned. Plastic bead media and wheat chaff are ones that I know have been used for Paralene
Electronics Forum | Thu Sep 10 17:13:31 EDT 2015 | tombstonesmt
There are factors that manufacturers have taken into consideration when dealing with coating. On/off times, dispense speeds, heights, etc.. Dedicated software with tools to easily map out paths are a godsend. We made our own coating machine with a s
Electronics Forum | Thu Jan 04 17:26:17 EST 2001 | Cory
We're going to begin conformal coating a few of our assemblies as required by our customer. We're using Kester No clean paste and will use cotton gloves to keep the boards clean while handling. My question is: Do we need to clean the boards prior to
Electronics Forum | Thu Feb 17 10:33:53 EST 2005 | Frank R.
I use conformal coating DYMAX #984-LVUF and I don't know if it's a problem of viscosity but 0805 components are not covered properly. We use a dispensor to applied it and we cured it by UV. Even if I apply a thicker layer, the coating seems to have
Electronics Forum | Wed Jul 02 02:46:44 EDT 2008 | tang
Hi Guys, I have few question would like to ask regarding pcb conformal coating: 1. Can I know which masking material is the best for easy apply, fast cure, fast & easy to remove after coating & baking. And no chemical reaction which will whiten the
