Graphene based structures and methods for shielding electromagnetic radiation
AssigneeInternational Business Machines Corporation
InventorsPhaedon Avouris, Alberto Valdes Garcia, Chun-Yung Sung, Fengnian Xia, Hugen Yan
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Abstract
Electromagnetic interference shielding structures and methods of shielding an object form electromagnetic radiation at frequencies greater than a megahertz generally include providing highly doped graphene sheets about the object to be shielded. The highly doped graphene sheets may have a dopant concentration greater than >1e1013 cm−2, which is effective to reflect the electromagnetic radiation or a dopant concentration of 1e1013 cm−2>n>0 cm−2, which is effective to absorb the electromagnetic radiation.
Claims6
An electromagnetic interference shielding structure for shielding electromagnetic radiation emitted from a source at frequencies greater than one megahertz comprising, in combination:
- the source configured to emit electromagnetic radiation at radio, microwave and terahertz frequencies;
- one or more graphene sheets stackedly arranged and in direct contact with one another and not a structural component of an electronic device disposed directly on a device to be protected from the electromagnetic radiation, wherein at least one of the graphene sheets is doped with a dopant having a dopant concentration in an amount effective to reflect electromagnetic radiation at frequencies greater than 1 megahertz, wherein the device includes an electronic circuit, wherein the dopant concentration (n) is greater than 1e1013 cm−2, and wherein the dopant is a metal salt selected from the group consisting of gold chloride and silver nitrate.
Dependencies are inferred from the claim text.