Electromagnetic interference shielding film and preparing methods thereof

An electromagnetic interference shielding film comprising:

• an insulation layer with pencil hardness of 2H to 6H, which includes a pigment, an inorganic additive, or a combination thereof;
• a first adhesive layer formed on the insulation layer;
• a porous metal layer having a plurality of micropores with a diameter of 1 to 120 microns, which is formed on the first adhesive layer, allowing the first adhesive layer to be located between the porous metal layer and the insulation layer, wherein a porosity of the porous metal layer is 15% to 30%, a tensile strength of the porous metal layer is equal to or greater than 20 kgf/mm2, and an elongation of the porous metal layer is equal to or greater than 5%;
• and
• a conductive adhesive layer with a plurality of conductive particles, which is formed on the porous metal layer, allowing the porous metal layer to be located between the first adhesive layer and the conductive adhesive layer,
• wherein the insulation layer is a double-layer insulation layer, one layer of the double-layer insulation layers has no inorganic additive added, and the other layer of the double-layer insulation layers comprises the inorganic additive.