Ferrite sheet is a magnetic film used for NFC antenna to resist metal shielding interference and enhance the sensitivity of induced signal reception. 13.56MHz antenna ferrite sheet / film is a high temperature sintered ferrite material. In handheld devices such as NFC payment mobile phones, the main function of electronic tags is to reduce the absorption of signal magnetic field by metal materials. At the same time, the ferrite film itself is a kind of high-temperature sintered ferrite material, which can effectively increase the sensing distance by increasing the magnetic field strength.