Hi ya'll!

I've got a project coming where it's called out to use a SN96 solder. Not
having the characteristics on the top of my head, I went to a web page to
refresh my memory. A SN 96 alloy is 96.5% Tin, and 3.5% Silver. It's a
eutectic alloy with the liquidous and solidus temperature at 221-degrees C.

The page stated the typical use was in applications where standard lead based
solders did not meet the safety or strength requirements. It also went on to
say that a SN96 was not recommended against gold plated surfaces. Guess what?
I was told the PCB is gold plated!

So what is the issue, gold embrittlement? Undesirable intermetallics? Would
sure like to know something about this...

Appreciate any info!

-Steve Gregory-

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