# US 2019/0315093 A1 · Electromagnetic wave transmissive metal member, article using the same, and production method for electromagnetic wave transmissive metal film > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0315093 A1 - Document ID: US20190315093A1 - Status: Published application - Kind: A1 - Application number: 16/313,338 - Filed: 2017-06-28 - Published: 2019-10-17 - Earliest claimed: 2016-06-30 - Assignees: Nitto Denko Corporation - Applicants: Nitto Denko Corporation - Inventors: Hajime NISHIO; Hironobu MACHINAGA; Kazuto YAMAGATA; Masaharu ARIMOTO; Xiaolei CHEN; Rie HAYASHIUCHI - Web page: https://patentgrep.com/patent/US20190315093A1 ## CPC - B32B 15/01: all layers being exclusively metallic {(making layered metal workpieces by pressure cladding B23K20/22; making coatings with a metallic material characterised by its composition C23C30/00)} - B32B 15/04: comprising metal as the main or only constituent of a layer, {which is} next to another layer of {the same or of} a {different material (next to a bituminous or tarry layer B32B11/08; next to a water-setting substance layer B32B13/06; next to a glass layer B32B17/061; next to a cellulosic plastic layer B32B23/042)} - B32B 15/08: of synthetic resin - B60R 19/52: Radiator or grille guards {; Radiator grilles (cooling aspects B60K11/08)} - C08J 5/18: Manufacture of films or sheets - C23C 14/024: {Deposition of sublayers, e.g. to promote adhesion of the coating (C23C14/027 takes precedence)} - C23C 14/205: {by cathodic sputtering} - C23C 14/34: Sputtering - C23C 14/562: {for coating elongated substrates} - C23C 14/5886: {Mechanical treatment (involving removal of material C23C14/588)} - C23C 28/021: {including at least one metal alloy layer} - C23C 28/321: {with at least one metal alloy layer} - C23C 28/34: {including at least one inorganic non-metallic material layer, e.g. metal carbide, nitride, boride, silicide layer and their mixtures, enamels, phosphates and sulphates} - G01S 7/03: Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver - G01S 13/93: for anti-collision purposes - G01S 13/931: of land vehicles - H01Q 1/3233: {particular used as part of a sensor or in a security system, e.g. for automotive radar, navigation systems} - B60R 2019/525: {Radiator grilles} - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - B60R: VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) - G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract Provided is an electromagnetic wave transmissive metal member capable of being easily produced at a low production cost, with both a metallic luster and an electromagnetic wave transmissibility, an article using the electromagnetic wave transmissive metal member, and a production method for an electromagnetic wave transmissive metal film. The electromagnetic wave transmissive metal member comprises a metal layer and a crack layer, wherein the metal layer and the crack layer have, in their respective planes, a plurality of linear cracks extending substantially parallel to each other. The linear cracks in the metal layer and the linear cracks in the crack layer penetrate through their respective layers in a thickness direction, and are continuous with each other in the thickness direction. ## Claims ### Claim 1 An electromagnetic wave transmissive metal member comprising a metal layer and a crack layer, wherein the metal layer and the crack layer have, in their respective planes, a plurality of linear cracks extending substantially parallel to each other, and the linear cracks in the metal layer and the linear cracks in the crack layer penetrate through their respective layers in a thickness direction, and are continuous with each other in the thickness direction. ### Claim 2 (depends on 1) The electromagnetic wave transmissive metal member as recited in claim 1, wherein an angle made by adjacent two of the linear cracks included in the plane of at least one of the metal layer and the crack layer is within the range of ±10°. ### Claim 3 (depends on 1) The electromagnetic wave transmissive metal member as recited in claim 1, wherein 40% or more of angles, each of the angles being made by two linear cracks which are arbitrarily selected from among a plurality of linear cracks included in a 400 μm square-plane of the metal layer or the crack layer, are within the range of ±10°. ### Claim 4 (depends on 3) The electromagnetic wave transmissive metal member as recited in claim 3, wherein, as for the two linear cracks which are arbitrarily selected from among a plurality of linear cracks included in a 400 μm square-plane of the metal layer or the crack layer, 40% or more of the angles, each of the angles being made by the selected two linear cracks, are within the range of ±10°, and 40% or more of the angles are in the range of 80° to 100°. ### Claim 5 (depends on 1) The electromagnetic wave transmissive metal member as recited in claim 1, wherein 80% or more of the plurality of linear cracks included in a 400 μm square-plane of the metal layer or the crack layer, lie within the range of ±5° with respect to a reference straight line. ### Claim 6 (depends on 1) The electromagnetic wave transmissive metal member as recited in claim 1, wherein the linear cracks are formed in the metal layer and the crack layer by bending and stretching a multi-layered film obtained by laminating the metal layer and the crack layer on a substrate film, in only one direction in a state in which the multi-layered film is folded toward the side of the substrate film. ### Claim 7 (depends on 1) The electromagnetic wave transmissive metal member as recited in claim 1, wherein a rate of linear cracks lying within the range of ±5° with respect to a reference straight line, among a plurality of linear cracks included in a 400 μm-square plane of the metal layer or the crack layer, is equal to or less than 70%. ### Claim 8 (depends on 1) The electromagnetic wave transmissive metal member as recited in claim 1, wherein the linear cracks are formed in the metal layer and the crack layer by bending and stretching a multi-layered film obtained by laminating the metal layer and the crack layer on a substrate film, in a plurality of directions in a state in which the multi-layered film is folded toward the side of the substrate film. ### Claim 9 (depends on 1) The electromagnetic wave transmissive metal member as recited in claim 1, wherein each of the linear cracks has a length of 200 μm or more. ### Claim 10 (depends on 1) The electromagnetic wave transmissive metal member as recited in claim 1, wherein the linear cracks generated in one of the metal layer and the crack layer located farther from a bending side when the metal layer and the crack layer are being bent with a given curvature, has a width of 0.1 nm to 100 nm. ### Claim 11 (depends on 1) The electromagnetic wave transmissive metal member as recited in claim 1, wherein a ratio of a thickness of the metal layer to a thickness of the crack layer is from 0.1 to 20. ### Claim 12 (depends on 1) The electromagnetic wave transmissive metal member as recited in claim 1, wherein the metal layer has a thickness of 10 nm to 1000 nm. ### Claim 13 (depends on 1) The electromagnetic wave transmissive metal member as recited in claim 1, wherein the crack layer has a thickness of 5 nm to 5000 nm. ### Claim 14 (depends on 1) The electromagnetic wave transmissive metal member as recited in claim 1, wherein the crack layer is made of a substance containing at least one selected from the group consisting of a metal having a Mohs hardness of 4 or more, an alloy comprising a primary component consisting of the metal, and ceramics. ### Claim 15 (depends on 14) The electromagnetic wave transmissive metal member as recited in claim 14, wherein the ceramics contains any of an oxide, a nitride, a carbide and an oxynitride of an element including at least one selected from the group consisting of a metal, silicon, and boron. ### Claim 16 (depends on 1) The electromagnetic wave transmissive metal member as recited in claim 1, wherein the metal layer has a Mohs hardness of 1 to less than 4. ### Claim 17 (depends on 16) The electromagnetic wave transmissive metal member as recited in claim 16, wherein the metal layer contains either of at least one metal selected from the group consisting of Al, Cu, Ag, Au, and Zn, and an alloy comprising a primary component consisting of the metal. ### Claim 18 (depends on 1) An electromagnetic wave transmissive metal film comprising the electromagnetic wave transmissive metal member as recited in claim 1, and a substrate film. ### Claim 19 (depends on 1) An electromagnetic wave transmissive metal member-equipped resin component comprising the electromagnetic wave transmissive metal member as recited in claim 1, and a molded resin substrate. ### Claim 20 (depends on 1) An on-vehicle radar device using the electromagnetic wave transmissive metal member as recited in claim 1. ### Claim 21 (depends on 5) A radar cover comprising the electromagnetic wave transmissive metal member as recited in claim 5. ### Claim 22 (depends on 5) A polarized wave antenna comprising the electromagnetic wave transmissive metal member as recited in claim 5. ### Claim 23 A method of producing an electromagnetic wave transmissive metal film, comprising: forming linear cracks in a metal layer and a crack layer by bending and stretching a multi-layered film in a longitudinal direction of the multi-layered film, in a state in which the multi-layered film is folded toward the side of an elongated substrate film along a cross direction intersecting the longitudinal direction, the multi-layered film being made by laminating the metal layer and the crack layer on the substrate film. ### Claim 24 (depends on 18) An on-vehicle radar device using the electromagnetic wave transmissive metal film as recited in claim 18. ### Claim 25 (depends on 19) An on-vehicle radar device using the electromagnetic wave transmissive metal member-equipped resin component as recited in claim 19.