Electronics Forum | Thu Mar 24 15:54:43 EDT 2011 | davef
You're correct. There's no point in conformal coating a board that you intend to pot. We're aware of no IPC [or IPCish] standards or guidelines for potting or encapsulation. We'd guess that materials and / or equipment suppliers would be the best pl
Electronics Forum | Tue Jul 05 17:43:43 EDT 2011 | davef
We agree. As Bill says, given that you seem to have bubbles in a restricted area and not broadly dispersed across your board, this seems to indicate an interaction between process materials, rather than a cure or thickness issue.
Electronics Forum | Fri Nov 04 16:36:53 EDT 2011 | davef
tombstonesmt: Ammonia based masks can create solderability issues after they are removed. You can get non-ammonia based latex mask material but down side is slower cure and cost a little more as they have higher levels of latex etc
Electronics Forum | Mon Feb 25 03:45:57 EST 2013 | odedkal
Hi Davef, The question is which product is better ? Do you know if there is some kind of research regarding these (or maybe others)materials ? best regards, Oded
Electronics Forum | Mon Jun 18 14:35:40 EDT 2018 | davef
That's a reasonable question for a supplier to ask his / her customer. It depends ... It depends on the materials use in the process the assembly and the reflow temperature recipe
Electronics Forum | Thu Aug 20 07:31:07 EDT 2020 | sssamw
It depends on what material you used, but normally viscosity, adhesion, thickness and coverage is usually being inspected in production.
Electronics Forum | Wed Feb 20 10:12:27 EST 2013 | dontfeedphils
Hey Bill, it really depends on the material you're looking at using UR, SR, AR, the easiest to deal with being AR, although if you can find a UR that doesn't clog up the machine too bad those are usually more viscous and easier to apply selectively u
Electronics Forum | Fri May 18 10:43:32 EDT 2012 | davef
Umar Chapter 7 of IPC-HDBK-830, Guidelines for Design, Selection and Application of Conformal Coatings deals with compatibility of the different materials in the chain. Have you: * Tested your bare boards at incoming for cleanliness with your Omega
Electronics Forum | Thu Aug 05 13:03:35 EDT 1999 | Dave Weihrauch
| | | | Has anyone out there tried to parylene coat plastic parts prior to soldering them to a pcb? I'm looking at several potential applications where fewer than 5% of my components on a pcb are plastic, yet from a reliability aspect (environmental
Electronics Forum | Wed Feb 24 14:17:20 EST 2016 | rgduval
I have a customer who is rather inexperienced, and asking us for a solution for them. They have a circuit board that's roughly two inches long by 1/2" wide or so, with component placements on one end of the board. The other end has a trace that I s
