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Electromagnetic wave absorbing and shielding film, method of manufacturing the same, and cable including the same

  • US 20090075068A1
  • Filed: 12/06/2007
  • Published: 03/19/2009
  • Est. Priority Date: 09/13/2007
  • Status: Abandoned Application
First Claim
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1. A method of manufacturing an electromagnetic absorbing and shielding film, in which the method comprises forming a plate-like metal flake using a spherical metal alloy by an attrition mill, which operates at a predetermined speed for a predetermined time, with the addition of steel use stainless (SUS) balls or ceramic balls and surfactants, and washing the plate-like metal flake with ethyl alcohol, methyl alcohol or water and drying the washed metal flake, the method comprising:

  • dispersing powder capable of absorbing electromagnetic wave selected from the group consisting of Fe—

    Si alloy, Fe—

    Si—

    Cr alloy, amorphous substance, sendust (SDST) alloy, High-Flux powder, molypermalloy powder (MPP), pure iron alloy (Fe—

    Si, or Fe—

    Si—

    Cr), amorphous alloy (Fe—

    Si—

    Al—

    Cr), carbon coated iron, Ni—

    Zn ferrite powder, Mn—

    Zn ferrite powder, and a mixture thereof, into a binder solution, thus forming electromagnetic wave absorbing paint; and

    coating the electromagnetic wave absorbing paint on the surface of a film capable of shielding electromagnetic wave and drying the resulting film, thus forming an electromagnetic wave absorbing and shielding film, of which one side is an electromagnetic wave absorbing layer having a thickness in a range of 10 to 100 μ

    m and the other side is an electromagnetic wave shielding layer.

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