Ultrathin shielding film of high shielding effectiveness and manufacturing method thereof

Abstract

The present application provides an ultrathin shielding film of high shielding effectiveness, comprising two or more solid shielding layers. An electrically-conductive adhesive layer is coated onto the outer surface at one side of the solid shielding layers, and one or more insulation film layers are formed on the outer surface at the other side of the solid shielding layers. A carrier film layer is provided on the outer surface of the insulation film layers. A protective film covers the lower surface of the electrically-conductive adhesive layer. The present application further discloses a manufacturing method of an ultrathin shielding film of high shielding effectiveness. The present application has the following advantages: the two or more ultrathin complete solid shielding layers are provided, which are capable of repeatedly reflecting and adsorbing high-frequency interference signals, and meanwhile, excessive charges are conducted into a ground layer, so that the high shielding effectiveness is realized; tests show that, at a frequency over 300 MHz, the shielding effectiveness can reach 60 dB or more; meanwhile, the ultrathin solid shielding layer is capable of providing great bending performance, so that the requirements of an electronic product for lightness and thinness are met.