Patent ID: 9545043
Date: 2017-01-10
CPC Classifications: H01L,H05K

Claim:
1. An electromagnetic interference shielded device, comprising: an electrical circuit comprising a radio frequency module or a digital module; a conforming dielectric layer disposed on at least a portion of the electrical circuit; an electrically non-conductive encapsulant layer disposed on at least a portion of the dielectric layer and disposed on the radio frequency module or the digital module of the electrical circuit, the dielectric layer being between the electrical circuit and the electrically non-conductive encapsulant layer, the electrically non-conductive encapsulant layer comprising a substantially planar encapsulant-air interface and an encapsulant-dielectric interface, the encapsulant-air interface extending across the electrically non-conductive encapsulant layer; and a plurality of particles anisotropically dispersed within the electrically non-conductive encapsulant layer such that a particle concentration along the substantially planar encapsulant-air interface is higher than a particle concentration along the encapsulant-dielectric interface, the plurality of particles comprising a Nickel-Manganese (NiMn) ferrite material or polyacetylene, wherein the particle concentration at the encapsulant-air interface is sufficiently high to provide electromagnetic interference protection to the electrical circuit and the particle concentration at the encapsulant-dielectric interface is sufficiently low to provide short-circuit protection of the electrical circuit along the encapsulant-dielectric interface.