（1） It can be divided into thick copper foil (more than 70 μ m) Regular thickness copper foil (more than 18 μ M but less than 70 μ m) Thin copper foil (more than 12 μ M but less than 18 μ m) Ultra thin copper foil (less than 12 μ m)。

（2） According to the surface condition, it can be divided into single-sided treated copper foil (single-sided wool), double-sided treated copper foil (double-sided thick), smooth treated copper foil (double-sided wool), double-sided glossy copper foil (double-sided wool) and very low profile copper foil (VLP copper foil).

1. Single side treated copper foil (single side hair): Electrolytic copper foil In China, the variety with large production volume is single-sided surface treatment copper foil, which is not only a type of electrolytic copper foil with large usage in the manufacturing of copper clad laminate and multilayer board, but also a copper foil with large application range.

2. Double sided processing copper foil (double sided thick): It is mainly used for multi-layer circuit board of fine circuit. Its smooth surface processing mask has a lower profile. The copper clad plate made by pressing this surface with the substrate can maintain a high precision circuit after etching. The demand for such copper foil is growing.

（3） By application scope:

1. Copper clad laminate (CCL) and copper foil for printed circuit board (PCB): CCL and PCB are widely used fields of copper foil. At present, PCB has become an indispensable component for most electronic products to achieve circuit interconnection. At present, copper foil has become the key material of PCB that plays the role of supporting and interconnecting components in electronic products. At present, electrolytic copper foil is widely used in CCL and PCB industries.

2. Copper foil for lithium ion secondary battery: according to the working principle and structural design of lithium ion battery, graphite, petroleum coke and other negative materials need to be coated on the conductive collector. Copper foil has become the negative collector of lithium ion battery due to its good conductivity, soft texture, mature manufacturing technology and relatively low price.

3. Copper foil for electromagnetic shielding: mainly used in hospitals, communications, military and other areas requiring electromagnetic shielding Calendered copper foil Due to the limitation of width, the electromagnetic shielding copper foil is mostly electrolytic copper foil.