Electronics Forum | Wed Sep 09 09:57:15 EDT 2009 | mikesewell
You mention silver pcbs - baking will accelerate oxidation/tarnishing of the finish. Solderability will likely go down...
Electronics Forum | Thu Jul 21 10:40:37 EDT 2011 | blnorman
What is the metal finish? Silver, HASL, Tin??
Electronics Forum | Thu May 27 06:47:45 EDT 2004 | Bryan Sherh
Hello All, I 'd like to have some stuffs about immersion Silver to study with.Can anybody provide some information or some articles about Immersion silver? Thanks a lot. Bryan
Electronics Forum | Thu May 27 06:48:20 EDT 2004 | Bryan Sherh
Hello All, I 'd like to have some stuffs about immersion Silver to study with.Can anybody provide some information or some articles about Immersion silver? Thanks a lot. Bryan Bryan.she@163.com
Electronics Forum | Thu Sep 17 23:36:35 EDT 2009 | Sean
All, We know that incomplete immersion silver could potentially lead this creeping corrosion. Is there any way to check bare PCB for incomplete immersion silver coverage, especially on the via hole area? Thanks, Sean.
Electronics Forum | Fri May 24 14:03:19 EDT 2002 | luvtolean
I have used both immersion silver and immersion gold and found that the immersion silver performed better in reliability studies for BGA's using 63/37 paste.
Electronics Forum | Wed Sep 03 16:15:30 EDT 2008 | blnorman
Elemental is by SEM/EDX. The brown coloration does resemble the 3 micron photo. Again, if I'm picking up copper (our Ag plating thickness requirements are 0.05 micron to 0.12 micron following IPC 4553), maybe we do have a porous silver plating.
Electronics Forum | Wed Sep 03 11:42:21 EDT 2008 | robinj
If the tarnish is really dark, it is very difficult to remove. Since it is yellowish it is only in the early stages. Replating will definitely work. I have used sulfuric acid based cleaners to remove this yellowish color. But rinse well and dry quick
Electronics Forum | Tue Apr 20 20:09:30 EDT 2004 | davef
Companies that license immersion silver technology to board fabricators are: * Alpha Level Silver * Mac Dermid Sterling [Mac Dermid's TM]
Electronics Forum | Mon Jul 31 13:04:01 EDT 2006 | russ
Never changed anytihgn when we switched to Immersion silver. Have run approximatelky 10,000 16mil pitch devices to date with immersion Silver PCB, stainless, chempolished 5 mil stencil, and pbfree paste (OM338). Russ
