Multilayer emi shielding thin film with high rf permeability

Abstract

A flexible multilayer electromagnetic shield is provided that includes a flexible substrate, a thin film layer of a first ferromagnetic material with high magnetic permeability disposed upon the substrate and a multilayer stack disposed upon the first ferromagnetic material. The multilayer stack includes pairs of layers, each pair comprising a polymeric spacing layer and a thin film layer of at least a second ferromagnetic material disposed on the spacing layer. At least one or more of the spacing layers includes an acrylic polymer. Also methods of making the flexible multilayer electromagnetic shield are provided.

Dependencies are inferred from the claim text.