At 09:16 12/21/98 -0700, Harrison Cooper wrote:
>I was sorta surprised that our folks didn't have a ready answer on this,
>but does anyone have a formula for the current capacity of a via?
>knowns are the via size, and copper for the layers.  I suppose the
>other unknowns (as of me writing this) is the thickness of the plating
>and the distance (# of layers going thru).

basically you have a conductor with a trace width of the circumference of
the via. how much you can put through it depends on the diameter, the
copper thickness and the temperature rise considered acceptable.

ge