Absorbing materials are a type of material that can absorb or significantly reduce the energy of electromagnetic waves projected onto its surface, thereby reducing the interference of electromagnetic waves. Absorbing materials not only have a high absorption rate of electromagnetic waves over a wide frequency band, but also have properties such as lightweight, temperature resistance, moisture resistance, and corrosion resistance. Electromagnetic interference absorbing materials mostly use their high magnetic permeability to attenuate the energy of incident electromagnetic waves, protecting surrounding sensitive components from interfering with the influence of electromagnetic waves. It is commonly used in electronic devices to reduce harmonic interference, enhance the stability of internal components, and reduce the impact of complex electromagnetic environments on the equipment. Electromagnetic interference absorbing materials are commonly used in electronic devices such as mobile phones, computers, workstations, NFC (Near Field Communication) technology, etc. EMI absorbing material is a soft magnetic material that can absorb electromagnetic wave energy projected onto its surface. The characteristics of absorbing materials have a wide range of electromagnetic interference resistance frequencies (10 M-6 GHz) up to 50 μ The ultra-thin thickness of m has good flexibility, bending resistance, easy die-cutting, low thermal resistance, and meets RoHS and HF standards. Available thicknesses: 50 µ m, 100 µ m, or 1500 µ m, T< 1000 µ m, can be made by rollers, T> 1000 µ m, can be used to manufacture mobile payment anti-interference absorption materials through thin plates. This material can be used in electronic devices to absorb electromagnetic radiation leakage and eliminate electromagnetic interference. In addition, in engineering applications, in addition to high absorption of electromagnetic waves in broadband, thin materials should also have lightweight, good flexibility, and easy die-cutting performance. Absorbing materials used for EMI shielding are an effective method for design engineers to reduce EMI. For different interference sources, the optimal absorption material should be selected after considering the installation size and spatial location to ensure that the system has the best shielding effect. Meanwhile, the absorbing material has high magnetic permeability. It can change the direction of the magnetic field, isolate magnetic field lines, and achieve magnetic isolation function.
