Electronics Forum | Mon Jun 20 02:43:55 EDT 2011 | milroy
What is the correct FR4 for RoHS? This PCB is a 4layer board. When we get the boards from the supplier they are properly packed in vaccum sealed bags without HIC card but there is desicant in side.
Electronics Forum | Mon Jun 13 09:43:11 EDT 2011 | mosborne1
Delamination almost always is caused by moisture in the PCB. You can try to keep some of the PCBs in a dry box after recieving them. You can also slowly heat them up to bake out moisture. If you are purchasing boards form overseas form a board house
Electronics Forum | Mon Aug 22 15:57:28 EDT 2005 | pr
Is there a test to check for delamination on a pcb? We are looking at new board houses and along with our standard solderability tests my boss wants to test for delamination. thanks, pr
Electronics Forum | Mon Nov 06 12:19:25 EST 2000 | Tom Gervascio
I ma trying to get some information on possible causes and screening tests for PCB delamination. Is the main cause moisture absorption of PCB material or entrapped chemicals and or air in innerlayers that expand when expsoed to subsequent reflow and
Electronics Forum | Fri May 27 04:31:56 EDT 2016 | leeg
We have recently had a jig get caught in the chain of the flowsolder machine, causing the board to delaminate, is there any hard and fast rules as to if the area needs evacuating due to fumes, and if the air quality has to be checked before allowing
Electronics Forum | Thu Sep 01 18:53:08 EDT 2005 | Board House
Pr. I agree with some of the above responses. if you are seeing Delam issues with incoming PCB's the following should be check. 1) Check the OEM Print to what Material they are calling out to be manufactured with. 2) If they are calling out for S
Electronics Forum | Mon Jun 13 12:58:10 EDT 2011 | deanm
We find it is a bigger issue in the summer when there is more humidity in the air even though our facility is air conditioned. We've also seen similar boards go through the same process and vendor A has problems and vendor B doesn't, so fabrication t
Electronics Forum | Wed Jun 22 02:30:33 EDT 2011 | boardhouse
if its a RoHs Assembly they should be using an FR4 material designed with higher TD to handle higher Assembly temps. 370HR,IT158, IT180, 4000-29 just to name a few that would be suitable. Standard FR4 material is not designed to handle the higher as
Electronics Forum | Thu Jun 16 16:50:37 EDT 2011 | boardhouse
Hi Milroy, One thing to check is the FR4 Laminate being used - if this is a RoHs build is the correct FR4 being used by your manufacture. What layer count of board are you seeing the delamination on? Does you board shop Vacuum seal the packages wi
Electronics Forum | Mon Feb 05 09:21:22 EST 2001 | pteerink
Talking about delamination...... I have a customer requesting info about the max temperature ratings for FR4. Can anyone point me to a good source? ( and yes, I HAVE checked the archives, to no avail.....) Phil
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