Anti- EMI film

Technology briefing

Electromagnetic Interference (EMI) is a phenomenon in which electromagnetic waves are spilled from electro-mechanical devices, such as computers and hand-held devices like mobile phones, ear phone, as well as electronic watch, etc. Therefore, if the electronic product does not have an effective anti-EMI design, the electromagnetic wave generated by the current or magnetic induction inside the electronic product will overflow, leaking out to the surrounding environment, thereby affecting the user, or interfering with other equipment in the place. The accuracy of an operation or measurement will be then deviated.

On the other hand, electromagnetic radiation tolerance (EMS) refers to the ability of electronic equipment to resist electromagnetic waves entering the machine. General medical equipment, aircraft, etc. have this specification to avoid operational failure that caused from outside radiation. Whether the consideration of  EMI or EMS, to prevent electromagnetic wave leakage or block electromagnetic wave intrusion is a need to present electronics devices.

According to the transmission method, EMI can be divided into two types:  conduction or radiation type. It happen either independently or simultaneously. The frequency range of EMI is generally between 10 Hz and 100 GHz. However, the electromagnetic waves produced by various electronic products or the sensitive frequency ranges affected by electromagnetic wave interference are different. For example, the sensitive electromagnetic waves of computer electronic components are between 450KHz and 1GHz, while the sensitive frequencies of other industrial electronic products are between 500KHz and 10MHz.

Efun using roll-to-roll sputtering technology to make the Anti-EMI film on the PET or PI substrates, and provides various material to satisfy the different specs. to satisfy different applications.

Spcification