What document has instructions on how to
determine minimum thickness of plating in
plated through holes?  

I have a customer who has a design with
4 oz copper on surface conductors and
2 mils of copper in holes and they want
to know if the 2 mils is really necessary and
don't know how to calculate needs.

Thanks for your help

Susan Mansilla
Robisan Lab
317-353-6249