Electronics Forum | Thu Apr 21 10:44:35 EDT 2005 | jdumont
Morning all. So today I have been tasked with conformally coating a few of our first run PCBs for a new product line. The problem is that they have already had all the larger caps potted with RTV. Are there any problems with spraying the CC over the
Electronics Forum | Thu Apr 21 12:35:15 EDT 2005 | jdumont
Well that doesnt sound very promising. What im going to do is make sure these two boards I just coated (with the RTV already cured) will be used in house only. In the future we will do any conformal coating operations before potting with whatever mat
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?
Electronics Forum | Fri Apr 22 10:12:14 EDT 2005 | davef
Common RTV does out-gas causing corrosion. NASA allows use of non/low-out-gassing RTV. Try the following companies: * Ablestik Electronic: Materials, 20021 Susana Road, Rancho Dominguez, California 90221 U.S.A., 310-764.4600, F 310-764-2545 * Arlon
Electronics Forum | Thu Apr 28 11:14:27 EDT 2005 | bbarr
If you apply the RTV after coating, what happens to bond strength since you are now bonding to the coating and not the board? Will the caps still survive vibration and shock? I specify applying RTV before coating for this reason. Am I correct? I als
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
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
Electronics Forum | Fri Sep 23 09:14:47 EDT 2005 | Base
Hey Rob, I've seen operators splicing large tapes not just by sticking them together with a piece of splicing-tape, but additionally they overlap the tapes and (forcefully) insert the last pocket of the leaving reel into the first (empty) pocket of
Electronics Forum | Fri Jun 16 00:45:19 EDT 2006 | Richard Robins-Bird
Not all splicing tapes require the use of specialist tooling or splicing plates to make a join. Please see wwww.fujismt.com where a complete range of SMT splicing tapes (Joint Tapes) can be found for use with chip mounters such as Assembleon, Europla
Electronics Forum | Wed Sep 21 10:11:12 EDT 2005 | gregp
Hi Rob, I'm not sure I know what you mean. Are you referring to adding leaders to cut tapes in order to minimize component loss? Also, I've never heard of tapes snapping. Is this something you see regularly on a particular piece of equipment? Th
