Patent ID: 11006554

Abstract:
Disclosed are an electromagnetic interference shielding film, a circuit board and a preparation method for the electromagnetic Interference shielding film. The electromagnetic interference shielding film includes a first shielding layer, a second shielding layer, an adhesive film layer and multiple convex particles, wherein a second surface of the first shielding layer 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 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.