Electronics Forum | Wed Jan 24 10:08:36 EST 2007 | electronhose
Immersion Silver, ImAg, is becoming the finish of preference. This is due to it having similar process limits vs. SnPb HASL. There were some early concerns about shelf life, but new chemistries have extended finish shelf life to 12 months+. Many boar
Electronics Forum | Mon Feb 18 09:25:20 EST 2019 | davef
It doesn't matter if the traces have solder or not. We're talking thermal cycles. RE IAg thickness: I believe the IAg is a self limiting process, similar to IAu. Your fab may be able to help a little, but I don't expect a substantial change. And if
Electronics Forum | Fri Mar 17 07:51:49 EST 2000 | Peter Barton
John, I have had previous experience of immersion silver coated PCB's in place of HASL coated type using no-clean processing with little or no problem at all. All of the process parameters were left unchanged. There is a very minor difference in th
Electronics Forum | Fri Mar 17 07:51:49 EST 2000 | Peter Barton
John, I have had previous experience of immersion silver coated PCB's in place of HASL coated type using no-clean processing with little or no problem at all. All of the process parameters were left unchanged. There is a very minor difference in th
Electronics Forum | Tue Aug 09 11:57:11 EDT 2005 | Board House
Hi Ted, I am a Sales Manager for a Circuit board Manufacture in MN. We have seen the Majority of our Customer base switch to Enig do to shelf life issues of silver and Tin. Silver, Tin & OSP all have a shelf life between 6 - 8 Mos. Enig is betwee
Electronics Forum | Mon Jul 05 03:44:53 EDT 2004 | johnwnz
Dave, I'm going to disagree with you on the ENIG, it's my 3rd choice only just beating out OSP for that 4th spot. 1. Immersion Silver - cheaper than ENIG, as flat and no issues with Brittle interface (black pad) or Gold Embrittlement) Longer shelf l
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 | 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 | Thu Dec 08 01:05:34 EST 2005 | Mike_Kennedy
Our new PCB supplier can give us a 20% price reduction if we convert from an ENIG finish to a FLASH gold finish. My uderstanding between the two is as follows: ENIG - Nickel is plated over copper and then immersed in Gold which forms a self limited f
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
