PCB

Ounce (OZ) is a unit of weight. Why is it used to express thickness in PCB?

The first thing to note is that the ounce (OZ) itself is a unit of weight. The conversion formula between ounces and grams (g) is: 1OZ ≈28.35g. In the PCB industry, 1OZ means the thickness of copper weighing 1OZ evenly spread over an area of 1 square foot (FT2). It expresses the average thickness of copper foil in terms of weight per unit area. Expressed by the formula, 1OZ=28.35g/FT2 (FT2 is square...

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