Homebrew PCBs

--- In Homebrew_PCBs@yahoogroups.com, garydeal <garydeal@...> wrote:
> 
>      Oh, and I'm sure this is common knowledge to the rest of you, 
but on 
> say, a 1 oz and 2 oz board, what are the copper thicknesses?
> 
>      Thanks,
>      -Gary
>

Per IPC-4562

1/2 oz board has a copper thickness of 17.1 um, or 0.68 mils
3/4 oz board has a copper thickness of 25.7 um, or 1.01 mils
1 oz board has a copper thickness of 34.3 um, or 1.35 mils
2 oz board has a copper thickness of 68.6 um, or 2.70 mils
3 oz board has a copper thickness of 102.9 um, or 4.05 mils

Thickness (mils) = 1.35 x Area Wt (oz/ftsquared)
1 oz = the weight of copper spread over 1 sqare foot.