Hi folks! Just a comment. Some of Werner's comments of Ag embrittlement 
are based on some ceramic components with silver plated finishes which 
resulted in severe solder joint issues on a series of investigations back 
in the SMART conference era. The IPC-4553 Immersion Ag finish group is in 
the final stages of finishing up an investigation where Immersion Ag 
surface finish was applied to test vehicles in both 1X and 3X thicknesses 
plus combine with SnPb and Pbfree soldering processes. The goal of the 
testing is to characterizes and determine if silver embrittlement of 
solder joint can be created under practical applications. The thermal 
cycle testing is complete and 100+ cross sections are undergoing SEM 
elemental mapping analysis. The report will be completed this year - keep 
an eye on the IPC-4553 group activities.

Dave Hillman
Rockwell Collins
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Werner Engelmaier <[log in to unmask]> 
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Re: [TN] Silver Embrittlement?






Hi Lee,
Au- and Ag-embrittlements are certainly documented?the combined effect is 
simply my extension of the phenomena.

Werner



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