Electronics Forum | Sat Aug 30 11:42:49 EDT 2008 | davef
Some immersion silver [IAg] products can go brown with aging. On a newly plated board, we expect you to see Ag, C, & O. The amount will vary according to supplier and thickness. Questions are: * How uniform is the brown coloration of the IAg on the
Electronics Forum | Thu Oct 07 08:13:52 EDT 2010 | remullis
I just swapped from the HASL to Immersion Silver mainly because the board house we use could not maintain consistency in keeping the pads level. I was constantly battling bumps and bad finishes on the pads. They are able to give me a consistent board
Electronics Forum | Tue Jun 02 17:45:46 EDT 2009 | boardhouse
Hi Nicoleta, As a board shop, either are good choices but in my experience with my customers ENIG has alway been the favorite due to it is easier to work with in regards to not having to tweak your equipment. As long as the board shop that you are u
Electronics Forum | Thu Jun 16 17:02:40 EDT 2011 | boardhouse
The finish looks like Immersion Tin or Silver. if its lead free Hot air - could be issue of to high of a Tin Content. find out what brand of Hasl they are using. SL100 Example. Is this tarnished look only being seen after assembly or have you seen
Electronics Forum | Mon Jun 25 11:33:20 EDT 2012 | davef
The immersion silver is an active surface and readily combines with sulfur from the environment. Silver sulfide tarnishes the surface and creates doubt about the integrity of the finish at inspection. [uyemura.com/library-4.htm] Your customer's boar
Electronics Forum | Wed Jun 21 08:55:39 EDT 2006 | yme111
Hi, Thanks for this reply. Our problem is that our customer complained that the pcb that we sent them is not Immersion silver though the actual appearance of the pad is silver. They claim that it is only silver and not Immersion silver. We asked our
Electronics Forum | Tue Apr 20 17:19:38 EDT 2004 | Mike
1. Which manufacturers have proven the immersion silver is reliable after solder joint assembly? 2. Who has published guidelines for storing and handling immersion silver boards? 3. Is the immersion silver finish wire bondable? epoxy bondable? or j
Electronics Forum | Fri Aug 08 06:44:33 EDT 2003 | Matt Kehoe
Emergency!!! We have a small run (5) of very dense boards that have an immersion tin finish. They were built in April/May and have a heavy tarnish appearance on them, smd pads and through holes. We are being asked to apply ssd to the surface mount pa
Electronics Forum | Sun Sep 15 21:44:41 EDT 2002 | jason
Hi Dave, Immersion Ag has poor surface appearances after reflow or rather tarnished, while Immersion Tin requries higher temp. Probably that's why Immersion Ag is more preferred.
Electronics Forum | Wed Apr 29 05:25:11 EDT 2015 | anirudh_thabjul
thankyou for you answer dude. As you mentioned in your answer that immersion tin finishing gonna cause many problems. So, immersion Tin option is ruled out for my purpose. So, immersion Silver is the option left for my purpose But, I have checked f
