What is Thin Copper Foil Thin Copper (UTC)

Thin Copper Foil Thin copper foil. Clad copper skin on the surface of the copper foil substrate is Thin Copper Foil if its thickness is less than 0.7mil (0.002mm or 0.5oz). If less than 1/3oz (12μm) is also known as Ultra Thin Copper Foil (UTC).