Hi Gebhard,
Thanks for the reference—it would have been clear to me if you had mentioned 
the White Paper I co-authored with Laura Turbini.
You are reading things into what I wrote that I did not say. I wrote:
"Require a nominal copper deposit thickness of 1.2 mils (30 micro-m) to 
obtain actual plating thicknesses in the range of 1.0 to 1.5 mils (25 to 38 
micro-m);"
I also state that: "A plating thickness of ~25 micro-m (~1.0 mils) has been 
found the minimum thickness to give good reliability; a plating thickness of 
~38 micro-m (~1.5 mils) is optimum from a reliability perspective. Plating 
thicknesses greater than that tends to promote shoulder fractures."
So, I did not say that 38 micro-m (1.5 mils) should be the maximum plating 
thickness.



Werner




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