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
Electronics Forum | Fri Sep 12 16:56:13 EDT 2008 | ppcbs
We have a double sided board with Immersion Silver Plating. After reflow the Silver turns a yellowish color. It still wets good, and the yellow color will polish off with a pencil eraser. Has anyone seen this, or know the cause?
Electronics Forum | Fri Apr 25 11:38:22 EDT 2008 | vortex337
Our company has run into an issue with de-wetting of lead free components. Our profile is dead on with paste manufacturers specs. We have had this issue with both gold immersed, and hot air leveled boards. We have tried three different solder paste m
Electronics Forum | Tue Mar 01 10:21:55 EST 2005 | davef
IPC Plating Committee is presently working on a specification for immersion tin [IPC-4554 Specification for Immersion Tin Plating for Printed Circuit Boards] as a solderable surface finish. Immersion tin is normally deposited at 30 to 60 microinches.
Electronics Forum | Mon Jun 18 10:20:14 EDT 2007 | ck_the_flip
Grant, i have heard of a few cases where the PCB is "reworked" by the PCB house, where the immersion silver that did not wet to the base copper was reworked by just putting immersion silver on top of the non-wetted immersion silver. I know your PCB
Electronics Forum | Mon Apr 26 14:40:07 EDT 2010 | blnorman
We had one product that used immersion silver plating. There were a couple of instances where we saw tarnishing, and elemental analysis confirmed the presence of sulfur. These boards did have the anti-tarnish sheets between boards, but somehow they
Electronics Forum | Mon Aug 07 13:27:40 EDT 2017 | dleeper
Are you seeing this on bare PCBs or after assembly? with Immersion silver, the finish over the copper should be very thin and uniform, that's the main advantage of ImAg. You should not be seeing excess plating filling vias unless: A)Its HASL, not
Electronics Forum | Thu Jun 14 09:09:57 EDT 2001 | adam
Sorry, wrong technical word I meant immersion silver (Ag). Thanks.
Electronics Forum | Tue Oct 22 20:38:50 EDT 2002 | davef
Search the fine SMTmet Archives for background on immersion silver.
Electronics Forum | Thu May 27 08:04:15 EDT 2004 | davef
Contact the licensers of imm silver process, mentioned earlier in this thread.
.png)