Combined board level EMI shielding and thermal management
View Patent ↗According to various aspects of the present disclosure, exemplary embodiments are provided of EMI shielding apparatus capable of providing board level EMI shielding for one or more electronic components while also providing dissipation of heat generated by the one or more electronic components. In one particular embodiment, an apparatus generally includes a board level shield having at least one resiliently compressible EMI gasket disposed along at least a portion of the board level shield. At least one thermally-conductive compliant material is disposed relative to an inner surface of the board level shield and to the one or more electrical components. The at least one thermally-conductive material can form a thermally-conducting heat path from the one or more electrical components to the board level shield.
1. An apparatus for providing board level EMI shielding and dissipating heat from one or more electrical components of a board, the apparatus comprising:
a single-piece board level shield comprising a metal material and two or more portions of differing recessed depths; and
at least one resiliently compressible EMI gasket disposed on the shield, the EMI gasket defining walls that are formed entirely by the EMI gasket and are of varying depth corresponding to the differing recessed depths, which walls extend below the single-piece board level shield and that define the periphery of a plurality of individual EMI shielding compartments cooperatively defined by the walls and the single-piece board level shield, wherein the plurality of individual EMI shielding compartments include a top surface defined by the single-piece board level shield, and sidewalls that define the periphery of each EMI shielding compartment formed to have corresponding differing recessed depths, whereby the EMI gasket and the single-piece board level shield cooperatively provide EMI shielding for each EMI shielding compartment to thereby inhibit the ingress and egress of EMI into and out of each EMI shielding compartment.
2. The apparatus of claim 1 , further comprising at least one thermally-conductive compliant material disposed relative to an inner surface of the single-piece board level shield and to the one or more electrical components for forming a thermally-conducting heat path from the one or more electrical components to the single-piece board level shield.
3. The apparatus of claim 2 , wherein the at least one thermally-conductive compliant material comprises at least one or more of a thermally-conductive pad, a thermally-conductive grease, and a thermally-conductive putty.
4. The apparatus of claim 1 , wherein the at least one resiliently compressible EMI gasket comprises electrically-conductive elastomer.