Electronics Forum | Wed Aug 22 21:42:54 EDT 2007 | davef
Questions are: * Do these pads take solder? How well? * Have you stripped the gold and evaluated the condition of the nickel?
Electronics Forum | Thu Aug 23 09:52:38 EDT 2007 | d0min0
Hi, in past we had an issue with ENIG surface, black was Ni that get pass the Au - but it was discovered after reflow (SnPb) and the IC was losing contact with Cu tracks...at customers application :| Reason was as I remember too thin Au sufrace... w
Electronics Forum | Sun Aug 26 11:27:12 EDT 2007 | vangogh
Hi Davef, Thanks for the reply. There seem to be no issues on SMT reflow based on some samples done. We have not stripped the gold yet. We did a X-section+EDX and we are seeing traces of copper on the nickel layer. Any idea what is the implication of
Electronics Forum | Mon Aug 27 08:03:32 EDT 2007 | davef
Actually, you will be soldering and wire bonding to the palladium layer, so we should have asked if you checked that layer, rather than the nickel. We not sure of the source of the copper that your see on EDX. It's possible copper from the pad migra
Electronics Forum | Thu Aug 30 09:49:32 EDT 2007 | blnorman
EDS @ 10kV maybe going too deep. I've talked to a surface science physicist that recommends Auger spectroscopy because it's more of a true "surface" examination tool.
Electronics Forum | Tue Aug 21 13:30:26 EDT 2007 | jseagle
Is it a clamshell type printer, opens on a hinge? If so you will never be able to reliably print with that type of printer. We had one of their printers and were never able to get it to print fine pitch reliably. It has nothing to do with the oper
Electronics Forum | Tue Aug 21 14:37:23 EDT 2007 | jseagle
We went with a DEK ELA automated printer and have never been happier. We print down to 16mil (.4mm) with great results. I know this may be beyond your budget but just look for a printer that raises straight off the board with no hinge. James
Electronics Forum | Wed Aug 22 02:01:03 EDT 2007 | lococost
Have you tried the same setup with your leaded paste? Your lf paste might have different cold slump characteristics.
Electronics Forum | Tue Aug 21 21:45:31 EDT 2007 | davef
Look here to get started: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=44831
Electronics Forum | Wed Aug 22 11:40:14 EDT 2007 | cedams
Dave, I'll be using Glastic for the bulk of the pallet but I'm looking for opinions on using titanium for masking and support where the Glastic will not support the weight. Thanks, Mike.
Nordson Electronics Solutions makes reliable electronics an everyday reality. Our ASYMTEK, MARCH, and SELECT brands deliver precision fluid dispensing, conformal coating, plasma treatment and selective soldering equipment.
2747 Loker Ave West
Carlsbad, USA
Phone: 18002796835
