Electronic equipment manufacturers usually use electromagnetic interference (EMI) and radio frequency interference (RFI) shielding measures to protect sensitive digital circuits from external radiation, and also limit the potentially harmful radiation emitted by their products.

Metal foil tape: Relatively easy to manufacture. The use of aluminum foil and copper foil backing tape provides excellent shielding performance without expensive metal plating on the case.

Usually referred to as etching or photochemical etching, it refers to removing the protective film of the area to be etched after exposure to plate making and development, and contacting the chemical solution during etching to achieve the effect of dissolving corrosion and forming irregularities or......

At present, there are two kinds of speaker nets for automotive interiors, mainly plastic and metal. Among them, plastic speaker nets account for the vast majority.

Relatively low-end cold rolled steel metal trumpet mesh. The metal horn grille of cold-rolled steel is widely used in some early BBA models.

Metal speaker net made of aluminum alloy. As a breakthrough point, starting from the selection of aluminum alloy materials, the metal speaker mesh can already be achieved through the etching process, that is, chemical corrosion.