ELECTROMAGNETIC INTERFERENCE SHIELDING FILM, CIRCUIT BOARD, AND PREPARATION METHOD FOR ELECTROMAGNETIC INTERFERENCE SHIELDING FILM

  • US 20210161040A1
  • Filed: 03/22/2018
  • Published: 05/27/2021
  • Est. Priority Date: 03/14/2018
  • Status: Active Grant
First Claim
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1. An Electromagnetic Interference shielding film, comprising a first shielding layer, a second shielding layer, an adhesive film layer and multiple convex particles, wherein the first shielding layer comprises a first surface and a second surface opposite to each other, the second surface is an undulating uneven surface;

  • the multiple convex particles are adhered on the second surface of the first shielding layer;

    the second shielding layer is disposed on the second surface of the first shielding layer and covers the multiple convex particles, thereby forming a protrusion portion at a position corresponding to the convex particles on an outer surface of the second shielding layer and forming a recessed portion at other positions;

    the undulation degree of the outer surface of the second shielding layer is greater than that of the second surface; and

    the adhesive film layer is disposed on the outer surface of the second shielding layer.

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