Electronics Forum | Thu Jan 31 22:22:04 EST 2008 | davef
It's not as simple as specifying tg in a leadfree world. You need to better understand delamination temperature - td. To start, search the fine SMtnet Archives on td. For instance: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=50312
Electronics Forum | Wed Apr 08 07:49:25 EDT 2009 | davef
We don't view this as "board delamination." It looks more like "solder mask bubbling." It may be the picture. Please describe the issue or enclude additional pictures.
Electronics Forum | Wed Apr 08 09:09:39 EDT 2009 | tommyttr
That is a delamination. It is indeed from moisture. You need to bake the boards for at least 8 hours and you should be good to go.
Electronics Forum | Sat May 02 08:48:32 EDT 2009 | davef
You have a board defect. Any moisture and/or organic contaminants trapped by the solder resist during lamination may cause solder mask delamination, blistering and/or adhesion loss during subsequent soldering operations or during extended use.
Electronics Forum | Mon Oct 26 12:40:08 EDT 2009 | awtm
pls find attached photo from Supplier saying that the failure at pth hole was due to blistering caused by moiture evaporate rapidly resulting delamination occur on FR-4 material from an old PCB (3yrs). Pls advise if attached picture confirms such co
Electronics Forum | Mon Jun 04 09:15:08 EDT 2012 | davef
bwjm: Delamination can be attributed to several factors: * Entrapped moisture, processing solutions, and what not that expands when heated to normal soldering temperature * Excessive soldering temperature * Excessive laminating temperature * Def
Electronics Forum | Tue Aug 06 08:21:28 EDT 2013 | leeg
I have been asked a question on what procedures we should in case of a PCB delaminating during the reflow process, e.g what gases can be produced and any evacuation /re-entering checks that we should do before allowing the operators to return to thei
Electronics Forum | Tue Aug 06 13:30:56 EDT 2013 | horchak
Wow this sounds like an upper management questions. Why would anybody suspect any different out gassing from a board that de-laminates and one that doesn't, unless of course the board is literally being burnt or scorched. If I'm missing something he
Electronics Forum | Fri Aug 09 02:51:54 EDT 2013 | leeg
The delamination was caused by a board falling off the rails and the operator not paying attention. I was more concerned with what fumes are produced by a smouldering board.
Electronics Forum | Fri Aug 09 12:40:41 EDT 2013 | boriskilk
ah, so just for the record, it's not always the PCB fab shop causing delamination. What a nice way to end a week.
