Electronics Forum | Thu Mar 02 16:06:32 EST 2000 | eLDON sANDERS
Gentlemen, I too have been atacked by that "soldering to gold" and will add my 2 cents. I also had parts that would pop off the board when the fillet looked perfect. After lots of pain, experimentation, and sleepless nights, I solved it through a
Electronics Forum | Tue Feb 01 12:52:19 EST 2005 | jbrower
Hi Tom, I did talk to Bob Gilbert about the sn100c. His comment is that it is a nickle stabalized alloy. Simplisticly, the tin and copper molecules would rather bond with the nickle. He also mentioned that with the SAC alloys, the manufactuers were
Electronics Forum | Mon Jun 25 20:39:08 EDT 2001 | ianchan
Hi mate, no complete info given from what i see, so just some humble comments, mayhaps you review : 1) PCB pad finishing - Copper+nickle plated? coz if so, nickle is a KILLER to good solder wetting. what we did back here, was to HAL coat the nickle
Electronics Forum | Tue Dec 14 17:02:04 EST 1999 | John Thorup
Hello Kris If you do have and OSP coating I'd say Curtis has nailed it. But you seem to have references to gold. Does this board have a standard nickle/gold finish. If so what sort of "solder on gold" problems were you having? Reading between the
Electronics Forum | Fri Sep 27 10:05:07 EDT 2002 | oconnorp
I spec COB using wire bond attach - 0.75um � 0.25 Gold over 5um � 3 Nickle.
Electronics Forum | Fri Mar 07 15:07:50 EST 2003 | davef
YiEng, MA/NY DDave: Usually when the gold plating bath goes south, you loose solderability.
Electronics Forum | Sun Mar 09 19:55:56 EST 2003 | iman
Which specific title books from under your pen, would you recommend for the avid process reader/learner? specific - talking about info/process/data wealth books, and not which books give the most royalties *grinz*
Electronics Forum | Tue Mar 11 12:20:13 EST 2003 | Jim
Look at "Dave's Book Shelf" here: http://www.smtinfocus.com/bookshelf/bookshelf.html
Electronics Forum | Tue Apr 01 19:36:02 EST 2003 | iman
from my humble experience : 1) check if there is nickle contaminate in the gold bath? shd have report data from the PCB fab house. 2) check if your production did 48hr bake at 125degC, IF the BGA did not come in its "original" MSD cozy packaging.
Electronics Forum | Sun Apr 11 14:35:25 EDT 2004 | davef
Please: * Describe the color and texture of the dry solder connection on the board. * Tell us the thickness of the gold and nickle plating on the board pads. * Inform us about the width and scope of the problem.
