Copper foil is an anionic electrolytic material deposited as a thin, continuous layer of metal foil on the substrate layer of a circuit board. It serves as a conductor of electricity for PCBs and is made of copper plus a certain percentage of other metals. There are two kinds of copper foils: 90 foils and 88 foils, i.e. 90% and 88% copper content, with the size of 16*16cm.Copper foils are widely used in the electronic industry, and their production methods can be divided into calendered copper foils and electrolytic copper foils, and their application fields can be divided into standard copper foils and lithium-ion copper foils.
