Driven by the development trend of lightweight, miniaturization, lightweight, high-frequency, high-speed and other electronic products, the functional requirements of FPC for electromagnetic shielding film are also in addition to the original higher electromagnetic shielding efficiency. It also needs to be able to effectively reduce the transmission loss of the signal. Therefore, in the field of electromagnetic shielding film, high shielding efficiency and low insertion loss have become the development trend of new electromagnetic shielding film.

As an important raw material for flexible circuit boards, it has a broad application space in the field of electromagnetic shielding and electromagnetic absorption. PCB is the key electronic interconnection device of electronic products, known as the "mother of electronic products". Flexible circuit board is a kind of printed circuit board, with high wiring density, light weight, bending, three-dimensional assembly, etc., suitable for miniaturized and lightweight electronic products.

Screen made by special process, synthesized at high temperature; Through special treatment, the electromagnetic interference is weakened, and the shielding glass does not distort the observed pattern (including the dynamic color image), which has the characteristics of high fidelity and high definition; At the same time, it also has the characteristics of explosion-proof glass. Effectively block the propagation of radio waves, infrared waves and other electromagnetic waves, so as to successfully block the impact of information leakage, electronic eavesdropping and electromagnetic radiation interference, ensure the normal operation of the equipment, and avoid the impact of electromagnetic radiation on personnel.

How to make the window have normal lighting and electromagnetic shielding effect. This requires the use of high-tech transparent films, which can play an electromagnetic shielding role while ensuring high light transmittance. Electromagnetic shielding film is a transparent film that meets the requirements of light transmission. When the propagation path of the electromagnetic wave meets the electromagnetic shielding film, the propagation direction of the electromagnetic wave will be changed.

When the electromagnetic wave is coupled from one side or radiated to the other side, the shield film can inhibit or attenuate the electromagnetic wave. 3C products such as laptops, GPS, ADSL, and mobile phones will produce noise due to high-frequency electromagnetic interference, affecting the quality of communication.