Circuit board shielding cover, what is the role of magnetic shielding +15 years of focus on shielding manufacturers

The circuit board shield, when the magnetic induction line enters the iron from the air, the magnetic induction line deviates greatly from the normal line, so it has a strong convergence effect. Since the magnetic permeability μ of the casing is much larger than that of air, most of the magnetic field lines pass through the wall of the casing, and there are very few magnetic lines of induction in the cavity in the casing. This achieves the purpose of magnetic shielding. In order to prevent the interference of the external magnetic field, a magnetic shield is often added to the outside of the focusing part of the electron beam in the oscilloscope and kinescope, which can play the role of magnetic shielding. In electronic equipment, some components need to prevent interference from external magnetic fields. To solve this problem, it is necessary to make a cover with ferromagnetic material, and cover the parts that need to be anti-interference in it to isolate it from the external magnetic field. You can also cover the parts that radiate and interfere with the magnetic field so that it cannot interfere. For other components, this method is called magnetic shielding. Because the magnetic resistance of the iron shielding shell is very small, it provides a smooth magnetic circuit for the external interference magnetic field, so that the magnetic lines of force are short-circuited through the iron shell and no longer affect the components that are shielded inside. Hardware, 15 years of focus on circuit board shielding, 20,000+ sets of customized stamping die production experience, monthly processing capacity of 100+ sets of molds, hundreds of precision processing production equipment, daily production capacity of 3 million punches, and silk-like stamping accuracy up to 0.01 mm, the raw materials are imported and the original national standard factory, and 16 quality inspections are strictly controlled.