Dear Technetters,
We want to protect silver plated contacts on solar cells from tarnishing by
overplating with a thin layer of gold.
I believe that the gold content of the final solder joint shouldn't exceed
3% (by volume of metal) to avoid embrittlement, but that means our gold
thickness will be 4 microns or less.
Is 4 microns thick enough to provide a non-porous gold layer and prevent the
silver from tarnishing?
Thanks in advance.
Jeff Brown
Research Engineer
Centre for Sustainable Energy Systems
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