Transparent radio frequency antenna and EMI shield
AssigneeChasm Advanced Materials, Inc.
InventorsRobert F. Praino, David J. Arthur, Emiliano Mezzarobba, Daniel Skiba
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Abstract
This disclosure includes, and results in the creation of, a printed carbon nanotube and/or graphene hybrid antenna and/or EMI shield, comprised of a conductive layer that comprises a metal mesh (MM) layer or a nanowire layer on a substrate, with a printed Signal Enhancement Layer (SEL) on the conductive layer. The SEL includes an ink that includes one or both of carbon nanotube (CNT) and graphene. The circuit pattern results after the “exposed” conductive layer (i.e., the regions where the CNT/graphene ink is not printed) is removed via chemical etching or mechanical cutting. The structure (the antenna/EMI shield) is preferably but not necessarily transparent.
Claims14
An EMI shield, comprising:
- a substrate;
- a conductive layer on a surface of the substrate and comprising either a metal mesh (MM) layer that comprises a metallic grid composed of ultranarrow interconnected spaced linear metal structures or a nanowire layer that comprises nanowires randomly distributed on the surface and with diameters that are less than their lengths;
- and
- a signal enhancement layer directly on top of the conductive layer and that comprises conductive nanoparticles that comprise one or both of carbon nanotubes (CNTs) and graphene, wherein the areal coverage of the conductive nanoparticles in the signal enhancement layer is from 0.75 mg/m2 to 5 mg/m2.
An EMI shield, comprising:
- a substrate;
- a conductive layer on a surface of the substrate and comprising either a metal mesh (MM) layer that comprises a metallic grid composed of ultranarrow interconnected spaced linear metal structures or a nanowire layer that comprises nanowires randomly distributed on the surface and with diameters that are less than their lengths;
- and
- a signal enhancement layer directly on top of the conductive layer and that comprises conductive nanoparticles that comprise one or both of carbon nanotubes (CNTs) and graphene, wherein the signal enhancement layer is made from an ink that comprises between 0.05 grams and 0.5 grams of the conductive nanoparticles per liter of ink.
Dependencies are inferred from the claim text.