Electromagnetic shielding concept:
When electronic devices work, they do not want to be interfered by external electromagnetic waves, nor do they want to radiate electromagnetic waves to interfere with external equipment and cause radiation hazards to human body. Therefore, it is necessary to block the propagation path of electromagnetic waves, which is electromagnetic shielding.
Working principle of electromagnetic shielding body:
Based on the reflection and absorption of electromagnetic wave. At present, the shielding function of electronic equipment is mainly realized by structure body and shielding pad. Among them, the structure body is usually a box with a certain thickness, which is made of steel plate, aluminum plate, copper plate or metal coating and conductive coating; the shielding liner is a device material with conductivity, which solves the electromagnetic shielding at the gap of the box body, and is made of metal, plastic, silica gel, cloth and other materials by stamping, forming and heat treatment.
Electromagnetic shielding material
Thermal conductive material concept:
Thermal conductive material is a new type of industrial material. These materials are designed for the heat conduction requirements of equipment in recent years, with excellent performance and reliability. They are suitable for all kinds of environment and requirements, have appropriate countermeasures for possible heat conduction problems, and provide powerful help for the high integration of equipment, as well as ultra-small and ultra-thin. The thermal conductivity products have been more and more applied to many products, improving the reliability of products
Working principle of thermal conductive materials:
The function of the thermal conductive interface device is to fill the air gap between the heating element and the heat dissipation element, so as to improve the thermal conductivity. When the thermal conductive interface device is not used, most of the effective contact area between the heating element and the heat dissipation element is separated by air. The air is the poor conductor of heat, which can not conduct heat effectively. After using the thermal conductive interface device, the effective heat transfer can be realized, and the working stability and service life of the product can be improved.
Thermal conductive materials
Application of electromagnetic shielding materials and thermal conductive materials:
Electromagnetic shielding materials and thermal conductive materials need to be updated rapidly according to the development of downstream electronic products. With the continuous innovation of electronic products, electronic products require higher performance, faster speed and more compact structure. Taking smart phones as an example, higher frequency and performance (four core / eight core), larger and clearer screen (2k / 4K), more built-in wireless devices (NFC, low-frequency Bluetooth, wireless charging, etc.) are the future development trend. With the rapid upgrading and performance improvement of electronic products, higher requirements are put forward for the effectiveness of electromagnetic shielding and heat dissipation, and the requirements for electromagnetic shielding materials and heat conduction materials are also higher and higher.
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