Why is the copper thickness in PCB an ounce
Specifically, the conversion method of length and thickness is as follows: First, we all know that the density constant of copper and therefore the relevant unit conversion formula are as follows: The density of copper p =8.9g/cm3 1 cm (cm) =10 mm (mm); 1 mm (mm) =1000 micron (um) 1 mil material 25.4 um 1 FT2 material 929.0304 cm2 1 mil material 25.4 um According to the mass calculation formula m = rho ×V (volume) = rho ×S (area) ×t (thickness), know the load of copper foil divided by the density of copper and therefore the area is that the thickness of copper foil. As previously known, 1OZ=t×929.0304cm2×8.9g/ cm3=28.35g So, t = 28.35/ 929.0304/ 8.9 cm ≈ 0.0034287 cm = 34.287 um material 34.287/ 25.4 mil≈ 1.35 mil Therefore, the thickness of 1OZ copper foil is about 35um or 1.35mil. Copper thickness 1.OZ(0.035mm) copper thickness 1.5OZ(0.05mm) copper thickness 2.OZ(0.07mm) https://www.ymspcb.com/news/why-is-the-copper-thickness-in-pcb-an-ounce-ymspcb Address： HuiZHou ...