On 6/22/07, Snail Instruments <snail@snailinstruments.com> wrote:
>
> >How does one convert oz/ft2 into mils as it relates to the thickness of
> >copper on a PCB?
>
> It should be converted thru copper density, which is 8 920
> kilogram/cubic meter = 8 910 oz/ft3.
>
> >to add that feature for the other unit selectable fields, one of which is
> >oz/ft2 or mils for copper thickness.
>
> Yet another way is thickness in micrometers.

Which is the correct way used even on clever american PCB houses
(which are trying with efforts to change everything on metric system).
see:
http://www.pcblibraries.com/forum/
or
http://www.pcblibraries.com/resources/GEN-docs.asp

0.5 oz = 17.5 um = 0.7mil (rounded value)
1 oz = 35 um = 1.4mil (rounded value)

Vasile
-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist