Electronics Forum | Thu Jul 24 14:53:17 EDT 2008 | boardhouse
I would agree with Doug, Enig with this type of switch is doubtful that it will hold up. You may have to think about Electroplated Deep Gold (hard Gold) 30-40 micro inches. Regards, Mike
Electronics Forum | Wed Nov 15 07:21:58 EST 2017 | stephendo
You don't clean contaminated gold fingers so much as you replace them. I once had the "cleaning" solution. It totally dissolved the gold fingers so that they could be replaced.
Electronics Forum | Thu Nov 10 20:39:44 EST 2022 | SMTA-64386598
The solderability shelf life of ENIG is related almost entirely to diffusion of O2 through the gold plating. When O2 diffuses through the gold, the underlying nickel is oxidized rendering it unsolderable (with ENIG - you solder to Ni, the gold dissol
Electronics Forum | Tue Apr 13 13:18:50 EDT 2004 | arcandspark
David F. thanks for information about the copper plating issues, I will check out the Indium site as you suggest. You are right about Thermount being Unreworkable, but T.I. makes us do it due to the cost of these RF proto types, $250 each bard board.
Electronics Forum | Tue Apr 13 07:08:34 EDT 2004 | mattkehoe
Dont forget, there is a method for BGA via in pad that is sometimes overlooked. Please look at http://www.sipad.net/sipadvip.htm It works!!!! mkehoe@sipad.net
Electronics Forum | Tue Apr 13 11:33:36 EDT 2004 | swagner
Arcandspark, I am having the exact same problem with a prototype product I ran last week, could you please give me a call about this so we can compare some notes. S. Wagner (260) 920-6072
Electronics Forum | Tue Apr 13 14:09:34 EDT 2004 | russ
I didn't know we worked for the same company (cheap)! Do you at least get to look at the boards before the ship schedule and pricing is determined and the kit is on the floor? DOE, taguchi, process capabilities? what? Russ
Electronics Forum | Mon Feb 09 16:55:28 EST 2009 | cuperpeter
Hi Sachin, thanks for your feedback. According to our supplier, surface plating is electrolytic gold over Nickel(not ENIG), but I think that is a still improper thickness for Au. (according to 3rd Working Draft from September 2008 of IPC 2221B "0.4
Electronics Forum | Tue Mar 31 05:26:14 EDT 2009 | d0min0
Hello, we had similar problem in the past - when we had to change PCB supplier from a batch of hundreds of boards (NiAu plated, SnPb process) we got 2-3 boards with paste wicking to components leads what we did, was to check the thickness of gold on
Electronics Forum | Tue May 12 06:44:16 EDT 2009 | jhk71
We do a conformal coating for a customer with copper-nickel-gold pads on his board. The pads are masked prior to coating with a standard gel, containing ammonia. After thousands of boards, being processed like this, now the gold pads seem to be less
