The principle of the mobile phone shield: use the shield to surround the interference source of the component, circuit, assembly, cable or the whole system to prevent the interference electromagnetic field from spreading outward; use the shield to surround the receiving circuit, equipment or system to prevent them from being affected by the external electromagnetic field. The shielding case is usually made of stainless steel and Cupronickel with thickness of 0.2mm. Among them, cupronickel is a metal shielding material easy to tin. The design of suction cup should be considered when SMT paste is used. The flatness of the mobile phone metal shield produced by Xinkuan is strictly controlled within the tolerance of 0.05mm to ensure its easy tin coating performance and excellent shielding effect.
1. Product Description:
?? many components of the motherboards of digital products such as mobile phones, modules, GPS, 3G wireless network cards, tablet computers and so on are welded with a shielding cover composed of a metal bracket and a metal cover. Shield is a kind of hardware parts. Shielding static electricity on PCB can protect electronic components, and the height of shielding cover is usually about 2.0 mm.
2. Function of shielding cover:
?? it is composed of outrigger and cover body, the outrigger and cover body are movable connection, and the cover body is spherical coronal. The utility model adopts the outrigger and the cover body as the movable connection, which can easily adjust the angle between them. The cover body is spherical and transparent, thus forming a safe operation area under the cover body. The operation mode is not only safe and reliable, but also convenient for the operation of the staff. Can be used in mobile phones, GPS and other fields, play a shielding role
3. Selection of shielding material:
?? the bracket can be made of Cupronickel (the price is relatively expensive) or tinplate (the price is much cheaper than Cupronickel). The cover is made of stainless steel. The shielding effect of the shielding cover directly affects the function of the product. How to choose the shielding material is the key. In the industry, the most commonly used is 0.2mm thick Cupronickel and stainless steel. In many materials, the shielding effect of Cupronickel is excellent. It is a kind of metal shielding material easy to tin.