# US 2021/0280982 A1 · Method For Producing A Layer Of A Device For The Absorption Of Electromagnetic Radiation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0280982 A1 - Document ID: US20210280982A1 - Status: Published application - Kind: A1 - Application number: 16/697,678 - Filed: 2019-11-27 - Published: 2021-09-09 - Earliest claimed: 2018-12-14 - Assignees: Airbus Defence and Space GmbH - Applicants: Airbus Defence and Space GmbH - Inventors: Christian Karch; Christian Metzner; Matthias Bleckmann; Heinrich Dinnebier - Web page: https://patentgrep.com/patent/US20210280982A1 ## CPC - B05B 7/0408: {with arrangements for mixing two or more liquids} - H01Q 17/00: Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems - B05B 13/041: {with spray heads reciprocating along a straight line} - B28B 1/001: {Rapid manufacturing of 3D objects by additive depositing, agglomerating or laminating of material (selective deposition modelling of metallic powder B22F10/00; rapid manufacturing of 3D objects in general and in particular of plastics B29C64/00)} - B29C 64/165: using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber - B33Y 10/00: Processes of additive manufacturing - B33Y 80/00: Products made by additive manufacturing - C09D 5/30: Camouflage paints - C09D 5/32: Radiation-absorbing paints {(protection against X-, gamma- or corpuscular radiation G21F)} - H01Q 17/004: {using non-directional dissipative particles, e.g. ferrite powders (H01Q17/005 takes precedence; flake-like H01Q17/002)} - H05K 9/0088: {comprising a plurality of shielding layers; combining different shielding material structure} - B05D 1/12: Applying particulate materials (B05D1/06, B05D1/10 take precedence) - B05D 5/00: Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures - B05D 2601/20: used for non-pigmentation effect - B22F 7/002: {of porous nature} - C04B 35/62635: {Mixing details} - C04B 2235/6026: Computer aided shaping, e.g. rapid prototyping - C04B 2235/775: Products showing a density-gradient - F41H 3/00: Camouflage, i.e. means or methods for concealment or disguise (for vessels B63G8/34, B63G13/02 {; sound camouflage, i.e. simulating gun fire noise, F41A33/04; dummy or decoy targets F41J; chaff per se F41J2/00; ammunition for dispensing chaff F42B5/15, F42B12/70; radar absorbing fabrics H01Q17/005}) - B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D) - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - B28B: SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER (foundry moulding B22C; working stone or stone-like material B28D; shaping of substances in a plastic state, in general B29C; making layered products not composed wholly of these substances B32B) - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02) - B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE - F41H: ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL ## Abstract A method for producing a layer of a device for electromagnetic radiation absorption, includes: providing a ply of powder material in the layer to be produced of the device; providing a predefined concentration distribution of particles for electromagnetic radiation absorption in the layer; providing a first binder and a second binder for the powder materials, wherein the first binder includes particles for the absorption of electromagnetic radiation, wherein the second binder includes a lower concentration of identical and/or different particles than the first binder; determining a mixing ratio between the first binder and the second binder for every position in the layer; selecting a position of the layer; mixing the first and second binder according to the mixing ratio for the selected position; wetting the powder material at the selected position using the mixed first and second binders; and repeating selecting, mixing, and wetting to produce the layer. ## Claims ### Claim 1 A method for producing a layer of a device for the absorption of electromagnetic radiation, wherein the method comprises: providing a ply of powder material in the layer to be produced of the device for the absorption of electromagnetic radiation; providing a predefined concentration distribution of particles for the absorption of electromagnetic radiation in the layer of the device for the absorption of electromagnetic radiation; providing a first binder for the powder material and a second binder for the powder material, wherein the first binder comprises particles for the absorption of electromagnetic radiation, wherein the second binder comprises a lower concentration of identical and/or different particles for the absorption of electromagnetic radiation than the first binder; determining a mixing ratio between the first binder and the second binder for every position in the layer on the basis of the predefined concentration distribution; selecting a position of the layer; mixing the first and second binder according to the mixing ratio for the selected position; wetting the powder material at the selected position using the mixed first and second binder; and repeating the steps of selecting, mixing, and wetting to produce a layer of the device for the absorption of electromagnetic radiation. ### Claim 2 (depends on 1) The method according to claim 1, wherein the second binder does not comprise particles for the absorption of electromagnetic radiation. ### Claim 3 (depends on 1) The method according to claim 1, wherein the particles for the absorption of electromagnetic radiation comprise dielectric, magnetic, and/or electrically conductive particles. ### Claim 4 (depends on 1) The method according to claim 1, wherein the particles, alone or in combination with one another, are configured to absorb the electromagnetic radiation in megahertz, gigahertz, and/or terahertz range. ### Claim 5 (depends on 1) The method according to claim 1, wherein the powder material is homogeneous. ### Claim 6 (depends on 1) The method according to claim 1, wherein the powder material is a mixture of at least two different powder materials. ### Claim 7 (depends on 1) The method according to claim 1, wherein the powder material comprises a ceramic material. ### Claim 8 (depends on 1) The method according to claim 1, wherein the method further comprises: repeating the method steps after producing a layer to produce at least one further layer of the device for the absorption of electromagnetic radiation on the produced layer. ### Claim 9 (depends on 7) The method according to claim 7, wherein the method further comprises, after the production of all layers of the device for the absorption of electromagnetic radiation: sintering the device for the absorption of electromagnetic radiation. ### Claim 10 (depends on 1) The method according to claim 1, wherein the selected positions of the layer form a structure pattern which comprises pores. ### Claim 11 (depends on 1) The method according to claim 1, wherein the selected positions of the layer form a structure pattern having different density distributions of the powder material in combination with at least the first binder. ### Claim 12 (depends on 1) The method according to claim 1, wherein the ply of powder material in the layer to be produced of the device for the absorption of electromagnetic radiation has a structure pattern. ### Claim 13 (depends on 1) A device for the absorption of electromagnetic radiation, wherein the device is produced according to the method according to claim 1, wherein the device comprises at least one layer, wherein the at least one layer comprises a material made of the powder material bonded to at least the first binder; and wherein the at least one layer comprises a concentration distribution of particles for the absorption of electromagnetic radiation according to the predefined concentration distribution. ### Claim 14 (depends on 13) A means of transportation comprising: a device for the absorption of electromagnetic radiation according to claim 13, and an outer skin; wherein the device is arranged on and/or in the outer skin.