Electronics Forum | Fri Nov 07 15:57:56 EST 2003 | Marc Simmel
Are there specifications or recommendations for electro-deposited tin-lead plating thickness on austenitic stainless steel that would provide a shelf life of 1 year? 6 months? Would 2 to 3 microns (78 to 118 micro-inches) 90/10 tin-lead over 1.27 mi
Electronics Forum | Sat Jun 04 01:39:39 EDT 2005 | adlsmt
It would appear that pure tin is backward compatible with leaded processes. This makes it a great finish, as if you migrate all your parts over time there is no issue mixing them. I am not aware of any finish that eliminates the possibility of tin wh
Electronics Forum | Fri Jun 17 13:14:34 EDT 2005 | Doug
Dave, The finish I'm most familiar with is the "white" tin by Omikron. Once the boards have been immersed the finish takes on much more of a white color however I have seen other immersion tin finishes where they are dull or bright in color. This is
Electronics Forum | Thu Dec 21 20:09:01 EST 2000 | Dave F
You are one lucky person to have access to the fine SMTnet Archives. They have over a hundred threads on immersion tin, white tin, and the other variants.
Electronics Forum | Thu Jul 17 10:56:50 EDT 2003 | James
COULD SOMEONE PLEASE TELL ME OF A WAY TO CLEAN THE OXIDIZATION OF OF WHITE TIN PADS, I AM GETTING ALOT OF DEWETTING PROBLEMS. AND I CONCLUDED THAT ALL THE BOARDS WITH WHITE TIN ARE HAVING THE SAME PROBLEMS. THANKS FOR THE INPUT.
Electronics Forum | Fri Jul 18 11:05:07 EDT 2003 | davef
A highly activated flux will begin to corrode the imm tin coating after 10 minutes. Corroded tin has poor solderability.
Electronics Forum | Thu Mar 25 10:25:46 EST 2004 | sjpence
For lead tinning services you might want to try: www.sixsigmaservices.com www.corfin.net Both of these companies will re-tin SMT.
Electronics Forum | Tue May 02 14:27:43 EDT 2006 | bhall
In the past we have used immersion tin as an alternative for HASL. Our biggest problem was shelf life. The tin oxidized very rapidly. We switched to immersion gold and have had great success.
Electronics Forum | Wed Sep 03 11:52:58 EDT 2008 | stepheniii
But Vlad was talking tin and Davef gave intermetalic thicknesses which Vlad said needs to be avoided by having a few microns of tin. I'm not 100% sure but I suspect that DaveF is not convinced that Vlad knows what "intermetalic" means.
Electronics Forum | Tue Nov 24 19:17:29 EST 2009 | gregoryyork
It could be that the Sn96 has dissolved the Tin rapidly and gone for the Copper. What dwell times are they using with the irons? Probably better off using a Tin Copper alloy for reduced dissolution worth a try Cheers Greg
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