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8 Layer Stackup
Please modify
the variables far and then click on the 'Calculate'
button. The trace impedance's will then be calculated.
Note:
All values
need to be filled to get the desired result.
1. All dimensions are in MIL (thousands
of an inch).
2.
For microstrip
traces (0.1< W/H < 4.0; 1 < εr
< 16 )
where W = width of the trace
H = height of the dielectric
εr
= Dielectric constant
3.
The Dielectric Constant of FR4 material may vary
by as much as 20% (4.2 to 5.2).
4. The overall Dielectric Thickness (Cu
to Cu) should total 62 MIL nominally.
5. Variables unavailable for modification
have no significant effect on the impedance of
the traces.
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