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Subject: Re: PCB trace resistance
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Date: 10/17/02 at 10:54 AM
Posted by: Robert Hawkins
In Reply to: PCB trace resistance posted by Clint Cook on 10/16/00 at 3:55 PM:
Resistance = (rho*Length) / (Area)rho = resistivity of the track material in Ohm MetresLength = Length of the track in metersArea = track cross sectional area in square metresArea is calculated by = .5 * (Width1 + Width2) * thicknessWidth1 is the width of the trace at the bottomWidth2 is the width of the trace at the top. Width1 and Width2 can be the same to simplify.thickness is the standard copper thickness.1 oz = .00003556 m ; 1/2 oz = .00001778 mrho for copper (pure) is 1.724E-08 ohm*mHope this helps someone!
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