Magnetron sputtering concept:
Magnetron sputtering is a technique that generates high-energy particle beams by combining an ion source with a magnetic field. In magnetron sputtering, the ion source is heated and releases charged particles, which are guided by a magnetic field to the surface of the target material and bombarded. During this process, some atoms will be stripped off and released from the surface of the target material, forming a thin film. Magnetron sputtering technology is widely used in the preparation of semiconductor devices, optical materials, coatings, and other fields.
Deposition of Multiple Film Systems on PET Plastic Substrate by Magnetron Sputtering Method
Metal shielding film layerAnd the preparation process of the metal film layer was studied. Finally, the shielding effectiveness of the metal film layer was tested using waveguide method Research has shown that using a Cu/1Cr18Ni9Ti bilayer metal film structure can achieve good surface properties and bonding strength, with a bonding strength of over 500kPa; Cu/1Cr18Ni9Ti with a total thickness of only 764nm can achieve a shielding efficiency of over 60dB at 2.5GHz; When the total thickness is equal, a double-sided metal layer has a higher effect than a single-sided metal layer
Working principle and core indicators of electromagnetic shielding film
According to the principle of electromagnetic induction, electric and magnetic fields will excite each other to form electromagnetic waves. When electronic components are working, capacitors and other components form an electric field, inductors and other components form a magnetic field, both of which will excite electromagnetic waves, and useless electromagnetic waves will induce with the electrical signals of the components themselves or other electronic components.
Electromagnetic shielding filmThe shielding principle of electromagnetic waves can be divided into two types: reflection attenuation and absorption attenuation. The shielding effectiveness can be further enhanced by superimposing the two principles or by stacking multiple layers of the same principle.
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