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 | 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 | Mon Dec 20 19:09:54 EST 1999 | Chris
If your flex circuit is only populated on one side, you can have the PCB vendor palletize the flex for you. What you do is have the flex circuit laminated to 062" FR4 using a thermoset adhesive like Dupont WA. Standard flex circuit adhesive. Howev
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 Dec 20 17:34:17 EST 1999 | Dave F
Ron: Chris is correct that there is a bunch of fixture fabricators that make good products that will serve your purpose. Other fixture fabricators can be found in the archives. Problems with these fixtures are: 1 Out-rageously expensive 2 Very lo
Electronics Forum | Tue Aug 31 12:42:45 EDT 1999 | Charles Barker
****************************************** ***************** HELP! *************** ****************************************** We are having a special ceramic smt board made. The boards are 16-up arrays that have smt pads on both sides. Only thre
Electronics Forum | Wed May 19 11:01:17 EDT 1999 | Vince Whipple
Wes, I have been involved with many customers changing over from an alcohol based no-clean to a VOC-free process. The change-over can be made easier by such things as air movement, convection preheat, "drains" or reliefs in pallets (if used), contr
Electronics Forum | Wed Jun 25 03:49:17 EDT 2003 | M.DAttilio
Hello everyone, my company produce Alumina PCB. Till now we mount ceramic BGA on alumina substrate, but now it's hard to find ceramic components so we'd like to mount plastic BGA on this kind of substrate. Do you know problems about it? Please, if yo
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