Electronics Forum | Wed Jul 06 20:05:02 EDT 2011 | rickysanchez
we are using the silicone Dow Corning JCR6101UP. we use it to coat the whole die including the wires.
Electronics Forum | Mon Jul 04 20:10:05 EDT 2011 | rickysanchez
1.The bubbles appear only after the oven curing.before curing no bubbles encounterred. 2.The bubbles were very small, and can be found around the die in between the die and the epoxy. 3.Curing time is 150 degC for 4 hours.
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 | Mon Jul 11 11:40:11 EDT 2011 | blnorman
According to the datasheet, this is a LED encapsulant, is that how you are using it? It also had a section on compatibility, which indicates that it is an addition-cure silicone prone to cure inhibition.
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 | Fri Apr 17 08:52:03 EDT 2015 | charliedci
Thanks for the info Sarason. The UVCL is a Urethane. Did not want that hard of finish (for solder rework issues). We like the Acrylic as acetone will remove cured material for solder rework.
Electronics Forum | Tue Feb 10 13:59:29 EST 2004 | Vadim
At times the orange peel effect can be from excess flux improperly removed. Our company strictly provides the service of selctive conformal coating application. We quite often see this. Most times if the board is simply "water washed", or IPA washed,
Electronics Forum | Tue Feb 10 14:02:03 EST 2004 | Maryann
At times the orange peel effect can be from excess flux improperly removed. Our company strictly provides the service of selctive conformal coating application. We quite often see this. Most times if the board is simply "water washed", or IPA washed,
Electronics Forum | Wed Oct 01 10:57:53 EDT 2008 | blnorman
Oxford Instruments makes a device called the OSPrey 800 that measures OSP thickness on the pads. We took a look at it last year because we have one line that uses OSP. It is pricey, and that's why we didn't order one, but if you use a lot of OSP, m
Electronics Forum | Mon Sep 29 16:02:33 EDT 2008 | scottd3
We are having problems with a specific lot of boards wave soldering. I need a way to prove the boards are bad, does anyone know a way to verify the amount of OSP coating on a board, or a company I can get to do it for me? I am using PBfree solder of
