Engineering plastics are the main materials for the shells of modern electronic equipment, but electromagnetic interference (EMI) can freely penetrate the plastics without shielding layer. When an electronic device, especially a digital circuit, runs, the EMI generated will interfere with the normal operation of other devices. Therefore, an EMI shielding layer must be added to the plastic shell of electronic equipment.

Vacuum sputtering EMI coating has the characteristics of environmental protection, non-pollution, high conductivity and high electromagnetic shielding efficiency. It is widely used in EMI shielding of projectors, telecommunications products (mobile phones), notebook computers (NB), network equipment, medical instruments, household electronic products, aerospace and other electronic equipment.