Electronics Forum | Tue May 21 17:16:51 EDT 2002 | davef
Larry, Yes, no matter how much you�d like to avoid using NC, you probably will have to start using the stuff, if the design [sales, in your case] types have their way. We can clean WS under 1mm and 1.25mm pitch BGA. For 0.8mm pitch BGA, we use NC.
Electronics Forum | Tue May 21 00:24:34 EDT 2002 | ianchan
yngwie, Hi mate, and Holy Crap! what a blooming pile of 7 feet dung you have sitting on your front lawn! ok, we had a customer SQE like that before, fortunately she was promoted from SQE to purchasing officer. and in the name of universal sharing,
Electronics Forum | Wed May 22 08:43:40 EDT 2002 | pjc
I have experience cleaning NC for military boards. The reason for cleaning the NC is due to conformal coating requirements. Zestron Vigon A200 and Atron AC 100, as well as Petroferm Hydrex DX have both been effective at cleaning Alpha UP78 NC paste.
Electronics Forum | Sat May 18 22:51:35 EDT 2002 | yngwie
First of all, my Customers can be described as a real "Jack-Ass" or at least the SQE does. They don't treat us as their partners OR more like "do what I said...When I started to use solder paste you probably weren't borned yet and/or probably still o
Electronics Forum | Tue Feb 03 03:35:30 EST 2009 | sachu_70
Hi Jose, such a process is possible, but you need to confirm that the PCB material has high Tg. In additon, you need to re-look solder paste printing parameters and make required changes in stencil apperture design for optimum solder volume. Just a
Electronics Forum | Wed Feb 21 14:14:11 EST 2007 | rgduval
Hi, Bill, Lead-free solder and paste manufacturers will be a great resource for you during the transition; they've tested their products extensively, and their application groups have been able to help me through the biggest changes. There are a fe
Electronics Forum | Wed Dec 22 07:20:21 EST 2010 | piter
HI I used both of solder leveling HASL and ENIG, HASL I can recommended for biger pitch is cheaper solder leveling than ENIG but problem with that solder leveling is during the reflow process HASL isn't flat and during reflow process component move
Electronics Forum | Mon Dec 20 08:23:30 EST 2010 | johanhuizing
The buyers in our company like to change the PCB finishing because of reducing costs. The proposed change is going from Ni/Au to HASL lead free, I know that in the beginning of the lead free period there where a lot of problems to use the HASL especi
Electronics Forum | Thu May 18 19:45:32 EDT 2006 | grantp
Hi, The tin flush is a good idea, and better than the suppliers suggestion of filling with lead-free solder which is much more expensive. I guess we won't be leaving a KG of solder in the bath, but based on your experience, how much remaining sold
Electronics Forum | Sun Feb 01 07:50:07 EST 2009 | davef
The concern about lead contamination of lead-free solder has to with zone refining. For more, look here: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=30315
