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Comparison of various board level shield can materials

Shields are increasingly used in electronic products, but because of the cost of raw materials and the different signal requirements of each product, each company has its own considerations in the selection of materials. At the same time, the price of raw materials varies greatly, and the materials used are also different, but the materials are the following: stainless steel, nickel-plated copper, tin bronze, brass, tinplate, etc. Among them, nickel-plated copper, stainless steel, tinplate are the most widely used . The advantages and disadvantages of various shielding cover materials are as follows:
Nickel Silver shield can : The shielding effect is slightly worse, softer, more expensive than stainless steel, and easy to tin. At present, most shielding shields use nickel white copper.
Stainless steel: good shielding effect, high strength, and moderate price; but difficult to apply tin (almost no tin can be applied without surface treatment, improved after nickel plating, but still not conducive to patch)
Tinplate: The shielding effect is the worst, but the tin is good and the price is cheap
Tin bronze: The shielding effect is slightly worse
Brass: The shielding effect is slightly worse
In the analysis of the above products, nickel white copper is mostly used as the raw material of the shield cover because of its better shielding effect, good corrosion resistance and good welding performance. Although the price is more expensive than stainless steel. The following mainly introduces the composition of nickel white copper:
Nickel copper is a copper-based alloy with nickel as the main alloying element. It is named because most of them are silver-white. Copper and nickel can dissolve indefinitely to form a continuous solid solution. Adding nickel to copper can significantly improve corrosion resistance, strength, hardness, resistance, and reduce the temperature coefficient of resistivity. Among the copper alloys, white copper is widely used as corrosion-resistant structural parts in cell phone signal shielding, electronic products, shipbuilding, petroleum, chemical industry, electric power, precision instruments, medical equipment and other departments due to its excellent corrosion resistance and easy plastic processing and welding. Some white copper also has special electrical properties, which can be used to make resistive elements, thermocouple materials, and compensation wires.
The above are the advantages and disadvantages of the selection of the shield material. At the same time, due to price and product requirements, stainless steel and tinplate also have great applications in the market.