Electronics Forum | Thu Sep 02 21:51:54 EDT 2004 | davef
Curious, but thoughts are: * Your pretinning pot is loaded with gold that has been removed from lead over a period of time * Your failed solder connections are caused by something else other that gold intermetallics * Your tinning process is undiscip
Electronics Forum | Sun May 02 06:15:58 EDT 2010 | stephan
I look for specification for degolding - pretinning for SMT and through hole parts (in the military sector) . I found IPC JSTD 001 and some ECSS ...08 but without visual real criterias on the product. Thanks for your inputs .
Electronics Forum | Fri Jul 26 08:25:25 EDT 2013 | emeto
If there is a way to pre-tin the parts, that might help in forming better joint with gold.
Electronics Forum | Wed Sep 23 13:56:02 EDT 2020 | emeto
Try to pre-tin the part. This should give you a lot of answers.
Electronics Forum | Thu Sep 02 18:39:48 EDT 2004 | steveg
We're having a lot of problems with failed solder joints to gold-plated MOSFET leads. Gold plate thickness spec is 60uin, but we've seen as much as 200uin in cross-section, so we're obviously concerned about gold embrittlement issues. Pre-tinning w
Electronics Forum | Thu Sep 07 15:20:58 EDT 2023 | rjroaquin6
Hello All, I recently had a case of excessive tin coming from a solder pot sample. The solder is SN63 but the results of testing had a 64.97% for Sn. The J-STD-001 spec is 61.5% to 64.5%. The pot is used to pre-tin wires which will then be solder
Electronics Forum | Wed Sep 18 17:21:19 EDT 2002 | slthomas
Dave, anything besides gold embrittlement to be concerned about if that concentration is exceeded? Never tried the stuff.
Electronics Forum | Wed Sep 18 18:10:15 EDT 2002 | davef
IMHO, this finish is more cosmetically appealing than technically desirable (and VERY profitable for the PCB maker). That editorial comment aside, you're correct. Increasing the concentration of gold: * Hardens the solder. * Increases the liquidou
Electronics Forum | Tue Feb 22 12:12:01 EST 2005 | jimby
We are looking at replacing some solder pots (wave type)for pretinning components. What type are people out there using?
Electronics Forum | Fri May 06 10:38:28 EDT 2005 | jimby
Make sure that whoever is pretinning leads are not using a water soluble flux. If they are, make sure parts are being cleaned immediately upon cooling
