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23 – Printed circuit boards – Copper-thickness conversion table

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1 oz = 28,35 g
1 ft = 30,48 cm
1 ft2 = 0,093 m2 = 930 cm2
Specific weight of copper = 8,9 g/cm3

Calculation examples
Volume = weight : specific weight = 28,35 g : 8,9 g/cm3 = 3,185 cm3
Foil thickness = volume : surface = 3,185 cm3 : 930 cm2 = 0,00342 cm = 35 µm

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