Electronics Forum | Thu Oct 22 15:10:00 EDT 1998 | Chris Fontaine
| I'M LOOKING FOR A SOLVENT TO MAKE REMOVING EPOXY FROM THE BOTTOMSIDE OF BOARD ON SMT COMPONENTS. THIS IS MOST IMPORTANT AFTER THE EPOXY HAS CURED AND EVEN RAN THROUGH THE WAVE. I'M LOOKING FOR A WAY OF | MAKING THE REWORK PROCESS ON THE CURED EPOX
Electronics Forum | Wed Apr 02 09:25:32 EST 2003 | davef
RDR The most common cause of dewetting is from a fabricator using any form of abrasive (e.g. pumice, abrasive brushes etc.) on copper. With this process, abrasive particles get implanted into the copper (often actually swaging copper over some of th
Electronics Forum | Wed Jan 16 07:49:40 EST 2008 | bandjwet
John: As one of the previous replies indicated a LASER of the proper wavelength (organic materials) will do this job. Contact BEST at http://www.solder.net offline to see if this is an option you want to pursue. Other methods include labels and m
Electronics Forum | Fri Oct 18 09:27:53 EDT 2013 | dontfeedphils
I believe it's mostly worn off through cleaning solvents and the slight abrasion during the under stencil cleaning process. I couldn't say whether or not it's ever in a state that would allow it to transfer to the PCB though.
Electronics Forum | Fri Apr 17 14:08:00 EDT 2015 | davef
Humiseal says, "UV cure – These materials are also more difficult to repair as they are the most chemically resistant and mechanically tough of all conformal coatings. Removal is possible locally by using powder abrasion."
Electronics Forum | Wed Feb 22 09:35:35 EST 2023 | richardcargill
out of interest, do you know what the nozzles are made of ? If you could get titanium ones then i would have thought abrasive wear shouldn't be an issue
Electronics Forum | Tue Aug 17 13:32:13 EDT 1999 | Brian
| Can anyone help on the subject of de-wetting during the spray coating process. We use PC29M Parts A+B spray coating material, Humiseal tapes and masking dots, Marigold supertouch V70N gloves and Concoat CM533 liquid masking material. We also use a
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 Mar 25 13:29:08 EST 1998 | Gary Simbulan
We currently use an abrasive fiberglass brush to clean the silver oxide off of our substrates proir to asembly. It's messy and tiring. Is there an alternative method, either chemical or mechanical that is cost effective for small (30 to 50ea 6in sq
Electronics Forum | Fri May 05 07:38:14 EDT 2006 | Chunks
Thanks davef, but having worked in the metal industry for years, I was wondering how someone would actually use a water jet to cut PCBs? I know it can cut them, but all water jets use an abrasive in the water. So, this would seem a rather "dirty" p
