# US 11,910,583 B2 · Electromagnetic wave absorption structure > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,910,583 B2 - Document ID: US11910583B2 - Status: Granted - Kind: B2 - Application number: 17/406,586 - Filed: 2021-08-19 - Published: 2022-03-31 - Granted: 2024-02-20 - Earliest claimed: 2020-09-30 - Assignees: Black Solution Nanotech Co., Ltd. - Applicants: Black solution Nanotech Co., Ltd. - Inventors: Feng-Yu Wu - Web page: https://patentgrep.com/patent/US11910583B2 ## CPC - H05K 9/0084: {comprising a single continuous metallic layer on an electrically insulating supporting structure, e.g. metal foil, film, plating coating, electro-deposition, vapour-deposition} - B32B 9/007: {comprising carbon, e.g. graphite, composite carbon} - H01Q 17/002: {using short elongated elements as dissipative material, e.g. metallic threads or flake-like particles} - H05K 9/0088: {comprising a plurality of shielding layers; combining different shielding material structure} - H05K 9/009: {comprising electro-conductive fibres, e.g. metal fibres, carbon fibres, metallised textile fibres, electro-conductive mesh, woven, non-woven mat, fleece, cross-linked} - B32B 2250/42: Alternating layers, e.g. ABAB(C), AABBAABB(C) - B32B 2307/206: Insulating - B32B 2307/212: Electromagnetic interference shielding - B32B 2307/732: Dimensional properties - B32B 2571/00: Protective equipment - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract An electromagnetic wave absorption structure includes at least one electromagnetic wave composite absorbing layer. The electromagnetic wave composite absorbing layer includes a conductive composite layer and an insulating layer. The insulating layer is stacked and overlapped with the conductive composite layer. The electromagnetic wave absorption structure can provide good electromagnetic wave absorption function, and have the features of light and thin, so it is particularly suitable for satisfying the electromagnetic wave absorption or shielding requirements of thin electronic products. ## Claims ### Claim 1 An electromagnetic wave absorption structure, comprising: at least one electromagnetic wave composite absorbing layer; wherein the electromagnetic wave composite absorbing layer comprises a conductive composite layer and an insulating layer, and the insulating layer is stacked and overlapped with the conductive composite layer, wherein the conductive composite layer comprises a plurality of conductive layers and a plurality of interlayer insulating layers, and the conductive layers and the interlayer insulating layers are stacked in a staggered manner, wherein the conductive layer is a graphene layer, a graphite layer, a graphite nanoplatelet layer or a carbon nanotube layer, and wherein the insulating layer or one of the interlayer insulating layers is a resin/ceramic mixture layer being formed by a ceramic powder mixed into a polymer resin, or a resin/metal mixture layer being formed by a metal powder or the metal powder that has undergone insulation treatment mixed into a polymer resin. ### Claim 2 (depends on 1) The electromagnetic wave absorption structure of claim 1, wherein a thickness of the electromagnetic wave absorption structure is between 5 μm and 5000 μm. ### Claim 3 (depends on 1) The electromagnetic wave absorption structure of claim 1, wherein a thickness of the conductive composite layer is between 1 μm and 100 μm. ### Claim 4 (depends on 1) The electromagnetic wave absorption structure of claim 1, wherein a thickness of the insulating layer is between 0.1 μm and 200 μm. ### Claim 5 (depends on 1) The electromagnetic wave absorption structure of claim 1, wherein amounts of the conductive layers and the interlayer insulating layers in the conductive composite layer are different. ### Claim 6 (depends on 1) The electromagnetic wave absorption structure of claim 1, wherein a thickness of the conductive layer is between 5 nm and 200 nm. ### Claim 7 (depends on 1) The electromagnetic wave absorption structure of claim 1, wherein a thickness of the interlayer insulating layer is between 5 nm and 10000 nm. ### Claim 8 (depends on 1) The electromagnetic wave absorption structure of claim 1, wherein a sheet resistance of the conductive layer is between 10 ohm per square and 1000 ohm per square. ### Claim 9 (depends on 1) The electromagnetic wave absorption structure of claim 1, wherein the electromagnetic wave absorption structure comprises at least two electromagnetic wave composite absorbing layers stacked and overlapped with each other. ### Claim 10 (depends on 9) The electromagnetic wave absorption structure of claim 9, wherein amounts of the conductive layers and the interlayer insulating layers in the conductive composite layer are different. ### Claim 11 An electromagnetic wave absorption structure, comprising: at least one electromagnetic wave composite absorbing layer, wherein the electromagnetic wave composite absorbing layer comprises a conductive composite layer and an insulating layer, and the insulating layer is stacked and overlapped with the conductive composite layer, wherein the conductive composite layer comprises a plurality of conductive layers and a plurality of interlayer insulating layers, and the conductive layers and the interlayer insulating layers are stacked in a staggered manner, wherein the conductive layer is a graphene layer, a graphite layer, a graphite nanoplatelet layer or a carbon nanotube layer, and wherein the interlayer insulating layer comprises epoxy resin mixed with boron nitride, the insulating layer comprises epoxy resin mixed with iron oxide. ### Claim 12 (depends on 11) The electromagnetic wave absorption structure of claim 11, wherein a thickness of the electromagnetic wave absorption structure is between 5 μm and 5000 μm. ### Claim 13 (depends on 11) The electromagnetic wave absorption structure of claim 11, wherein a thickness of the conductive composite layer is between 1 μm and 100 μm. ### Claim 14 (depends on 11) The electromagnetic wave absorption structure of claim 11, wherein a thickness of the insulating layer is between 0.1 μm and 200 μm. ### Claim 15 (depends on 11) The electromagnetic wave absorption structure of claim 11, wherein amounts of the conductive layers and the interlayer insulating layers in the conductive composite layer are different. ### Claim 16 (depends on 11) The electromagnetic wave absorption structure of claim 11, wherein a thickness of the conductive layer is between 5 nm and 200 nm. ### Claim 17 (depends on 11) The electromagnetic wave absorption structure of claim 11, wherein a thickness of the interlayer insulating layer is between 5 nm and 10000 nm. ### Claim 18 (depends on 11) The electromagnetic wave absorption structure of claim 11, wherein a sheet resistance of the conductive layer is between 10 ohm per square and 1000 ohm per square. ### Claim 19 (depends on 11) The electromagnetic wave absorption structure of claim 11, wherein the electromagnetic wave absorption structure comprises at least two electromagnetic wave composite absorbing layers stacked and overlapped with each other. ### Claim 20 (depends on 19) The electromagnetic wave absorption structure of claim 19, wherein amounts of the conductive layers and the interlayer insulating layers in the conductive composite layer are different.