Electronics Forum | Mon Sep 22 16:10:35 EDT 2003 | Joe
Help Please! A friend of mine works for this company (a novice in the hardware world), they are thinking about covering their PCBAs with Epoxy (don't know what) so to prevent hackers from damaging their PCBAs - they claim it is costing them too much
Electronics Forum | Thu Apr 15 11:14:34 EDT 2004 | mikecollier
Our conformal coat area has recently requested changes to our bare board houses to perform a pumice scrub operation on the PWB prior to HASL plating and delivery to us. Our first lot received caused us to have void faults under multiple component ty
Electronics Forum | Sat Aug 21 08:00:50 EDT 2004 | davef
First, we know of no conformal coating that will help your situation. Second, as you say, companies recognize that stress testing of shippable products is NOT good practice, because it strips life from the product. So, your product is more expensiv
Electronics Forum | Thu Sep 16 18:59:14 EDT 2004 | Carol
Thanks Everyone, the information was very useful. We use 7095 as a bible. A-610 6.5.3 doesn't allow for any solder balls not entrapped/attached etc. so we will look again at plugging/tenting both ends of the via. We ran into the problem of the mask
Electronics Forum | Fri Jun 03 16:35:40 EDT 2005 | davef
We've never tried to remove Paraylene from a BGA, but we stayed [in seperate rooms] at the Red Roof Inn. Parylene/Paraxylyene is a great coating and can be selectively removed by several methods. IPC-7711 (Rework of Electronic Assemblies) has a sect
Electronics Forum | Tue Jul 26 20:43:46 EDT 2005 | davef
And the reason the connectors aren't on one side of the board is ... Thougts are: * Pealable temporary solder mask * Removable boots Sources of boots that may be ESD protected are: * Kinnarney Rubber; 450 Main St PO Box 37 Mantua, NJ 08051; 856-468
Electronics Forum | Tue Jan 03 17:36:49 EST 2006 | MikeF
If you know you have cleaned any flux residues that were under there you could consider a bead of an electronic grade RTV, such as RTV3145. If you trap any uncleaned residues under there you could have long term reliability problems. But, like Dave
Electronics Forum | Sun Mar 12 22:02:40 EST 2006 | Steveo
Personally I think Grid lok is inferior to the new Vacunest system, especially in screen printing. Vacunest is basically a bean bag that conforms to the shape of the PCB and then holds this shape indefinatley under vacuum, until the vacuum is releas
Electronics Forum | Thu May 11 15:11:14 EDT 2006 | patrickbruneel
I assume you talk about wave soldering. No-clean fluxes are widely used since 1987 or earlier and after all these years they have proven to be reliable. If you clean the board or not the dust bunnies etc. will still reach the board surface. If you us
Electronics Forum | Tue Sep 05 16:26:53 EDT 2006 | Bill
Thinking about this auto-mode on Grid-Lok..... Ok, the board is warped, lets say positively, the pins conform to the warped board... what about the effect on top side and squeegee pressure? It will be much higher and could damage stencils, right? Pos
