Electronics Forum | Thu Apr 27 10:35:21 EDT 2000 | Russ
Scott, I am a little confused, when you mention "silver thru hole vs. plated through hole what do you mean. A silver "immersion" type finish vs. HASL (Tin lead)on your PCB? Or are you talking about using silver solder to perform intrusive reflow of
Electronics Forum | Mon May 13 16:20:10 EDT 2002 | ian
Are you refering to MacDermid Sterling Silver finish or immersion silver in general. We have had enquiries about Sterling Silver from a customer and the blurb I have read looks very good (don't most sales literature). Has anyone tried this finish? O
Electronics Forum | Thu Apr 27 11:36:53 EDT 2000 | PeterB
Russ, We also use 'immersion silver' and have not had any impact on our processes. In fact there are a number of benefits i.e very flat pads (as good as electroless nickel/immersion gold but much cheaper and less unfriendly to the environment), good
Electronics Forum | Fri Jan 11 17:14:13 EST 2002 | davef
We have one product with electroless nickel, immersion silver solderability protection. We do not purport to be experts, but like many things, have seemingly boundless opinions. Side note: There are a least three different [maybe five] imm silver
Electronics Forum | Mon Feb 18 07:49:17 EST 2019 | SMTA-Joe
the tarnishing is happening across all the traces without solder even being applied. The PCB is soldered into the housing first. Once this is complete the traces have changed, and when it is time to solder the components to the traces this tarnishing
Electronics Forum | Thu May 09 17:13:10 EDT 2002 | davef
We are converting all our ENIG to imm silver. CHARACTERISTICS * Nominal thickness of the deposit will be 0.1 to 0.3 microns. * Deposit is flat and uniform * It will withstand multiple heat cycles in assembly, which can be problematic with tradition
Electronics Forum | Mon Feb 18 07:52:09 EST 2019 | SMTA-Joe
Would increasing the thickness to compensate be a reasonable soulluction? This tarnishing is happening after the first time heat is applied. Could it be a factor of too long in ramp and/or soak?
Electronics Forum | Fri Jan 16 16:36:07 EST 2009 | boardhouse
i would not try to chemically clean the finish, you would just be asking for other problems. 1) I would ask your supplier their Hasl mix. Standard Lead hasl is 63/37 - it almost sounds like your boards have a higher content of Tin and your experien
Electronics Forum | Fri Apr 23 14:27:22 EDT 2010 | hegemon
I am concerned about a 'tarnishing' effect after moisture bake out that affects solderability on a batch of PCBs. This finish is new to us,and I am wondering if anyone has ideas about how to drive the moisture out of the boards without compromising
Electronics Forum | Wed Nov 06 20:18:30 EST 2002 | davef
cvrgrrrl Your first thermal cycle with imm silver should be the easiest to solder. That you see copper indicates you did no soldering, got no wetting, produced no intermetallics, etc. Tell us again which components did not solder? Wuzzis "plug" t
