Electronics Forum | Fri Nov 09 16:59:32 EST 2001 | davef
Dunno. What is your goal in coating boards? What material are you using? How thick are you applying this material?
Electronics Forum | Mon Aug 04 15:06:24 EDT 2003 | swagner
Don't forget to look into Nordson's coating equipment, it's more expensive than the other's but you get what you pay for.
Electronics Forum | Fri Feb 13 14:50:57 EST 2004 | blnorman
Underfills could improve reliability. If you pick materials right, you could co-cure and underfill and coating.
Electronics Forum | Fri Sep 09 17:01:40 EDT 2005 | GS
You can find some input on IPC-HDBK-830 Guidelines for Design, Selection and Apllication of Conf Coating. Also look at IPC-CH-65A, Guidelines for Cleaning of Printed Board Assemblies. Regards...........GS
Electronics Forum | Thu Dec 15 08:55:56 EST 2005 | Amol Kane
unless of course, it can be proved that the coating sticks to the uncleaned board and shows no defects as per IPC specs....but it doubt it
Electronics Forum | Mon Feb 27 16:37:57 EST 2006 | davef
Options are: * Find a low residue flux and conformal coating material that are compatable, so that cleaning is not required. * Use a cleanable low residue flux, clean according to the supplier's recommendations, and then coat boards.
Electronics Forum | Wed Apr 05 07:50:10 EDT 2006 | Choppy
Good idea, pick the most difficult of your PCB and watch the final result. If you can, go to each company and watch the machine how it coats your board. You'll see what is the most suitable for you.
Electronics Forum | Thu Apr 20 09:53:25 EDT 2006 | samir
Amol, good call there. Silicone mask and silicone coatings are friendly with each other. This was 1995, and at the time, there were no silicone boots available on the market.
Electronics Forum | Wed Apr 18 11:25:06 EDT 2007 | jdumont
We use 1B73 Acrylic and coat right over an IBM processor which gets a heat sink mounted on top. Never had an issue after 5 years of production. Dont forget to post if you find anything out though.... JD
Electronics Forum | Mon Jun 25 12:23:15 EDT 2007 | coax
As for the bubbles/fisheyes, try increasing your thinner ratio. This sounds like your coating is thickening up before you are able to apply it to your application.
