Many people are interested in the question of what copper foil is (what kind of material copper foil is). Here is an answer for you.

Copper foil is a kind of negative electrolytic material. It is a thin, continuous metal foil deposited on the substrate of the circuit board. It serves as the conductor of PCB. It is easy to bond to the insulating layer, accept the printing protective layer, and form the circuit pattern after corrosion. Copper foil is made of copper plus a certain proportion of other metals. There are generally two types of copper foil, 90 foil and 88 foil, that is, 90% and 88% copper content, 16 * 16cm copper foil, which is the most widely used decorative material. For example: hotels, temples, Buddha statues, gold lettered signboards, tile mosaics, handicrafts, etc.