WO2020095554A1 - 車載レーダー装置用レドーム及びその製造方法 - Google Patents

車載レーダー装置用レドーム及びその製造方法 Download PDF

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Publication number
WO2020095554A1
WO2020095554A1 PCT/JP2019/037061 JP2019037061W WO2020095554A1 WO 2020095554 A1 WO2020095554 A1 WO 2020095554A1 JP 2019037061 W JP2019037061 W JP 2019037061W WO 2020095554 A1 WO2020095554 A1 WO 2020095554A1
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WIPO (PCT)
Prior art keywords
background color
layer
electromagnetic wave
metal layer
transparent substrate
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2019/037061
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English (en)
French (fr)
Japanese (ja)
Inventor
佐藤大輔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sankei Giken Kogyo Co Ltd
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Sankei Giken Kogyo Co Ltd
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Filing date
Publication date
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Publication of WO2020095554A1 publication Critical patent/WO2020095554A1/ja
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Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • 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
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal 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
    • B32B15/08—Layered products comprising a layer of metal 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 of synthetic resin
    • B32B15/082—Layered products comprising a layer of metal 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 of synthetic resin comprising vinyl resins; comprising acrylic resins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes

Definitions

  • the present invention relates to a radome for an on-vehicle radar device, and relates to a radome for an on-vehicle radar device having a plurality of background colors and a manufacturing method thereof.
  • a radome for an in-vehicle radar device having a plurality of background colors there is a radome of Patent Document 1 having two colors of a printing layer black and a coating layer silver as a background color of a glittering discontinuous metal film.
  • printing is performed on a printing layer forming region on the back surface of the transparent resin member to form a black printing layer, and then a region where an emblem is formed is covered with a painting mask and painted.
  • the transparent resin member excluding the mask is coated on the back surface to form a silver coating layer.
  • a resin is separately injection-molded to form an inner core, a discontinuous metal is formed by vacuum deposition or sputtering so as to cover the surface of the inner core, and the inner core having the discontinuous metal formed therein is accommodated in a transparent resin member.
  • a radome is obtained by accommodating in a recess.
  • the back surface of the transparent resin member is exposed in the region where the emblem in which the black printed character is provided in the center is formed.
  • a paint mask is applied to the area where the emblem of the transparent resin member in such a state is formed and the paint is applied, the paint permeates into the gap between the paint mask and the exposed transparent resin member, and the boundary of the paint layer is blurred and visible. There is a case that it will be in the state of being.
  • the painting process using a painting mask complicates the work, and causes problems such as a reduction in work efficiency and an increase in manufacturing cost.
  • the present invention is proposed in view of the above problems, it is possible to manufacture by decorating without using a coating mask, the boundary of the decorating layer is made clear, the efficiency of decorating work is improved, and the manufacturing cost is improved. It is an object of the present invention to provide a radome for a vehicle-mounted radar device having a plurality of background colors and a method for manufacturing the radome, which can reduce the above-mentioned problem.
  • the radome for an on-vehicle radar device has a first background color visible range in which the first background color of the first background color printing layer is visually recognized from the surface side of the transparent substrate, and a second background from the surface side of the transparent substrate.
  • a second background color visible range in which a second background color different from the first background color of the color decoration layer is visually recognized, and the first background color and the second background color from the front surface side of the transparent substrate.
  • the electromagnetic wave permeable metal layer is visually recognized, and the electromagnetic wave permeable metal layer visible range is provided, and at least the first background color visible range is located around the second background color visible range.
  • a decorative layer is provided.
  • the transparent substrate includes both a single transparent base material and a transparent base material having a transparent base layer formed on the back surface side. According to this, the second background color decorative layer is located around the second background color visible range, and the electromagnetic wave in the electromagnetic wave transmitting metal layer visible range is behind the first background color printing layer in the first background color visible range.
  • the electromagnetic wave permeable metal layer is formed on the back surface of the transparent substrate, for example, a resin is separately injection-molded to form the inner core, and the metal is formed so as to cover the surface of the inner core.
  • the work of housing the film-formed inner core in the housing recess of the transparent resin member is not necessary, and in this respect, the efficiency of the manufacturing work and the manufacturing cost can be reduced.
  • the first background color printed layer in the first background color visible range and the second background color decorative layer in the second background color visible range are adjacent to each other in a front view.
  • the transparent substrate is formed on the back surface at different depth positions, and the second background color decorative layer in the second background color visible range and the electromagnetic wave permeable metal layer in the visible range. It is characterized in that the transparent bases are formed on the back surface at substantially different depth positions at positions adjacent to each other in a front view.
  • the first background color printed layer in the first background color visible range the second background color decorative layer in the second background color visible range, and the electromagnetic wave permeable metal layer in the visible range
  • the marks and mark formation areas such as emblems shown by the combination of the three
  • the electromagnetic wave permeable metal layer in the visible range
  • the mark symbol portion is composed of the second background color decorative layer in the second background color visible range and the electromagnetic wave permeable metal layer in the visible range.
  • the second background color decorative layer is formed of a second background color decorative layer in the second background color visible range
  • the second background color decorative layer is a second background color coating layer, a second background color vapor deposition layer, a second background.
  • One of the color sputter layers is formed. According to this, by forming the mark symbol portion such as the emblem symbol portion other than the printing layer, the shape of the surface area of the transparent substrate on which the mark symbol portion is formed can have three-dimensional unevenness as needed.
  • the radome for an on-vehicle radar device is characterized in that the transparent substrate is a transparent substrate made of synthetic resin, glass or ceramic.
  • the transparent substrate is a transparent substrate made of synthetic resin, glass or ceramic.
  • a method for manufacturing a radome for an on-vehicle radar device is a method for manufacturing the radome for an on-vehicle radar device according to the present invention, wherein at least the first background color printed layer and the electromagnetic wave permeable metal layer are transparent. Decorating the first background color printed layer and the electromagnetic wave permeable metal layer between the first background color printed layer and the electromagnetic wave permeable metal layer on the back surface of the substrate, and A second region on the back side of the first background color printed layer located around the first region, and a third region on the back side of the electromagnetic wave permeable metal layer located around the first region, It is characterized by comprising a decorating step of forming the second background color decorating layer by decorating with the decorating of the first region.
  • the second background color decoration layer when the first area where the first background color printing layer and the electromagnetic wave permeable metal layer are not formed is coated, decoration work such as electroless plating, vapor deposition or sputtering can be performed.
  • the simplification can be expanded and the allowable range of decoration accuracy can be expanded.
  • the method for manufacturing a radome for an on-vehicle radar device comprises, prior to the decorating step, a first step of printing a first background color on the back surface of a transparent substrate to form the first background color printing layer, At least a back surface of the transparent substrate corresponding to a second background color visible range in which a second background color different from the first background color is visually recognized from the front surface side of the transparent substrate is covered with a photomask, The second step of forming a modified surface by light irradiation on the back surface of the transparent substrate corresponding to the visible range of the electromagnetic wave permeable metal layer where the electromagnetic wave permeable metal layer is visually recognized from the surface side of the transparent substrate, and an electroless plating treatment.
  • a third step of forming the electromagnetic wave permeable metal layer of the discontinuous metal layer on the modified surface it is possible to eliminate the film formation of the electromagnetic wave permeable metal layer other than the modified surface, reduce the amount of metal used for forming the electromagnetic wave permeable metal layer such as the discontinuous metal layer, and reduce the manufacturing cost. In addition to being able to do so, valuable metal resources can be effectively used. Further, for example, it is possible to increase the equipment cost when performing vacuum sputtering or vacuum deposition, eliminate the restrictions on the size and shape of the transparent substrate to be film-formed by the vacuum container, and apply it to radomes of various shapes at low cost. It will be possible.
  • the method for manufacturing a radome for an on-vehicle radar device comprises, prior to the decorating step, a first step of printing a first background color on the back surface of a transparent substrate to form the first background color printing layer, At least a back surface of the transparent substrate corresponding to a second background color visible range in which a second background color different from the first background color is visually recognized from the front surface side of the transparent substrate is covered with a metal mask, A second step of forming the electromagnetic wave permeable metal layer in a region including the back surface of the transparent substrate corresponding to the visible range of the electromagnetic wave permeable metal layer in which the electromagnetic wave permeable metal layer is visually recognized from the surface side of the transparent substrate; It is characterized in that a third step of removing the mask is performed.
  • the electromagnetic wave permeable metal layer can be formed by vapor deposition, sputtering, electroless plating, or the like, and the degree of freedom in the manufacturing process can be increased.
  • the method for manufacturing a radome for an on-vehicle radar device comprises, prior to the decorating step, a first step of printing a first background color on the back surface of a transparent substrate to form the first background color printing layer, From the rear surface of the transparent substrate corresponding to a second background color visible range in which a second background color different from the first background color is visually recognized from the front surface side of the transparent substrate, and from the front surface side of the transparent substrate.
  • a third step of removing the electromagnetic wave transmitting metal layer formed on the back surface of the corresponding transparent substrate by laser irradiation is performed. According to this, it is possible to peel the electromagnetic wave permeable metal layer into a free shape at high speed and with high precision by laser irradiation, and the electromagnetic wave formed on the back surface of the transparent substrate corresponding to the second background color visible range. It is possible to reliably remove the transparent metal layer and prevent the electromagnetic wave transparent metal layer or a part thereof from remaining in the visible range of the second background color, and the second background of the visible range of the second background color. It is possible to secure good visibility of the color decoration layer.
  • the removal treatment of the electromagnetic wave permeable metal layer by laser irradiation can be performed at low cost, and the manufacturing cost can be further reduced. Further, this manufacturing process can be performed without using a mask, and also in this respect, the manufacturing cost can be reduced. Further, it becomes possible to form the electromagnetic wave permeable metal layer by vapor deposition, sputtering, electroless plating or the like, and the degree of freedom in the manufacturing process can be increased.
  • a radome for a vehicle-mounted radar device having a plurality of background colors it is possible to manufacture by decorating without using a painting mask, and to clarify the border of the decorating layer and perform the decorating work. It is possible to improve efficiency and reduce manufacturing costs.
  • FIG. 2 is an enlarged sectional view taken along line AA of FIG. 1.
  • A)-(e) is a schematic explanatory drawing explaining the manufacturing process of the radome for vehicle-mounted radar apparatuses of embodiment.
  • A)-(e) is a schematic explanatory view explaining the 1st modification of the manufacturing process of the radome for vehicle-mounted radar apparatuses of embodiment.
  • A)-(e) is a schematic explanatory view explaining the 2nd modification of the manufacturing process of the radome for vehicle-mounted radar apparatuses of embodiment.
  • (A) is a schematic partial sectional view of a radome for an on-vehicle radar device of a first modified example
  • (b) is a schematic partial sectional view of a radome for an on-vehicle radar device of a second modified example
  • (c) is an on-vehicle of a third modified example.
  • an in-vehicle radar device radome 1 includes an insulative transparent base material 2 that is visible from the surface side corresponding to the transparent base material of the present embodiment, and a transparent base material.
  • An insulating support member 3 that is provided on the back side of the material 2 and supports the transparent base material 2 is provided, and the support member 3 is formed in a predetermined shape that supports the transparent base material 2.
  • the transparent base material 2 in this embodiment is an insulating transparent resin, and is a colorless synthetic resin having a plate thickness of 2 mm and a visible light transmittance of 50% or more. It is possible to use an appropriate material such as synthetic resin, glass, or ceramics for the transparent substrate 2 within the scope of the present invention, but it is preferable to use an insulating transparent synthetic resin.
  • the transparent substrate 2 is preferably a colorless material or a colored material having a visible light transmittance of 50% or more in order to ensure good visibility.
  • the transparent substrate in the present invention is preferably a transparent substrate such as synthetic resin, glass, or ceramics, but on the back side of the transparent substrate, an acrylic resin, a polyurethane resin, a polyester resin, a silicone resin, an epoxy resin, It is also possible to form a transparent underlayer of a synthetic resin such as a fluororesin, a vinyl resin, a styrene resin, an amino resin, a phenol resin, a nitrocellulose resin, and a melamine resin.
  • a transparent substrate such as synthetic resin, glass, or ceramics, but on the back side of the transparent substrate, an acrylic resin, a polyurethane resin, a polyester resin, a silicone resin, an epoxy resin, It is also possible to form a transparent underlayer of a synthetic resin such as a fluororesin, a vinyl resin, a styrene resin, an amino resin, a phenol resin, a nitrocellulose resin, and a melamine resin.
  • the transparent substrate is made of a synthetic resin, a single transparent substrate of glass or ceramic, if a coating mask is applied and coating is performed, the coating material easily penetrates into the gap between the coating mask and the back surface of the exposed transparent substrate, Although bleeding is likely to occur, in the present embodiment, such a situation can be eliminated and the boundary of the coating layer can be surely made clear.
  • the material when the transparent base material 2 is made of an insulating transparent synthetic resin is appropriate in an applicable range, and examples thereof include polycarbonate (PC), polymethylmethacrylate (PMMA), acrylonitrile-butadiene-styrene copolymer (ABS). ), Polyethylene terephthalate (PET), polyethylene (PE), polypropylene (PP), acrylonitrile-styrene copolymer (AS), polystyrene (PS), cycloolefin polymer (COP), etc., alone or in combination of two or more. Can be used in combination, and may contain an additive.
  • PC polycarbonate
  • PMMA polymethylmethacrylate
  • ABS acrylonitrile-butadiene-styrene copolymer
  • PET Polyethylene terephthalate
  • PE polyethylene
  • PP polypropylene
  • AS acrylonitrile-styrene copolymer
  • PS polystyrene
  • COP cycloo
  • the support member 3 is formed of, for example, an insulating synthetic resin, is fixedly provided to the second background color coating layer 6 described later, and the transparent base material 2 is fitted into the frame portion 31 of the support member 3.
  • the transparent base material 2 is fixed.
  • the material when the supporting member 3 is made of an insulating synthetic resin is appropriate in an applicable range, for example, polycarbonate (PC), polymethylmethacrylate (PMMA), acrylonitrile-butadiene-styrene copolymer (ABS), polyethylene.
  • PET Terephthalate
  • PE polyethylene
  • PP polypropylene
  • AS acrylonitrile-styrene copolymer
  • PS polystyrene
  • COP cycloolefin polymer
  • AES acrylonitrile-ethylene propyl rubber-styrene copolymer
  • Polycarbonate resins such as PC / ABS and PC / PET, styrene-acrylonitrile copolymer (SAN), acrylonitrile-butyl acrylate rubber-styrene copolymer (AAS), acrylonitrile-polyethylene chloride- Tylene copolymer (ACS), polybutylene terephthalate (PBT), polyvinyl chloride (PVC), polyamide (PA), polyacetal (POM), polyether sulfone (PES), thermoplastic polyimide (PI), polyether ketone ( PEK), polyether ether ketone (PEEK), polyphenylene sulfide (P
  • a first background color printing layer 4 printed on the back side of the transparent substrate 2, and an electromagnetic wave formed on the back side of the transparent substrate 2 by electroless plating, vapor deposition or sputtering.
  • An electromagnetic wave permeable metal layer 5 such as a discontinuous metal layer that is transparent and has a metallic luster, and a second background color coating layer 6 corresponding to the second background color decorative layer on the back side of the transparent substrate 2.
  • the first background color of the first background color printing layer 4 and the second background color of the second background color coating layer 6 are different colors, and the electromagnetic wave permeable metal layer 5 is different from the first background color. The appearance is different from any of the second background colors.
  • the first background color and the second background color may be appropriately combined as long as they are different colors.
  • the black first background color may be a blue or purple second background color or the like.
  • the electromagnetic wave permeable metal layer 5 may be an appropriate electromagnetic wave permeable metal layer, and may be, for example, a discontinuous metal layer that is electromagnetic wave permeable and has a metallic luster and visibility, or vapor deposition or A semiconductor layer such as silicon or germanium formed by sputtering or the like, or a metal having a visible light reflectance of 50% or more (for example, gold, silver, copper, aluminum, platinum, palladium, iron, nickel, chromium) with this semiconductor. It can be an alloy layer with a bright metal.
  • the first background color visible range 21 in which the first background color is visually recognized from the surface side of the transparent substrate 2 and the second background color is visually recognized from the surface side of the transparent substrate 2.
  • a second background color visible range 22 and an electromagnetic wave permeable metal layer visible range 23 in which the electromagnetic wave transparent metal layer 5 is visually recognized from the surface side of the transparent substrate 2 are provided.
  • a step is formed on the back surface 26 of the transparent base material 2, and a position in the depth direction of the back surface 26 p of the transparent base material 2 corresponding to the first background color visible area 21 and a second background color visible area 22 are formed.
  • the back surface 26q of the corresponding transparent base material 2 is formed so that the position in the depth direction is different from each other, and the position in the depth direction of the back surface 26q of the transparent base material 2 corresponding to the second background color visible range 22 and the electromagnetic wave transmission.
  • the rear surface 26r of the transparent base material 2 corresponding to the visible range 23 of the metallic metal layer is formed so as to be different from the position in the depth direction.
  • the surface 27 of the transparent base material 2 in the illustrated example is formed into a curved surface or a flat surface having no step.
  • the depth direction of the back surface 26q of the transparent substrate 2 corresponding to the second background color visible range 22 is more than the depth direction position of the back surface 26p of the transparent substrate 2 corresponding to the first background color visible range 21.
  • the back surface 26r of the transparent substrate 2 is formed so that the position in the depth direction is located on the front surface side.
  • the back surfaces 26p, 26q, 26r of the transparent substrate 2 may each have a planar shape or a curved shape.
  • the first background color printing layer 4 is fixedly formed on the back surface 26p of the transparent substrate 2 corresponding to the first background color visible range 21, and the electromagnetic wave permeable metal is formed on the back side of the first background color printing layer 4.
  • the layer 5 and the second background color coating layer 6 are sequentially laminated and fixed.
  • the second background color coating layer 6 is fixedly formed on the back surface 26q of the transparent substrate 2 corresponding to the second background color visual recognition range 22.
  • the electromagnetic wave permeable metal layer 5 is fixedly formed on the back surface 26r of the transparent substrate 2 corresponding to the visible range 23 of the electromagnetic wave permeable metal, and the second background color coating is further applied to the back surface side of the electromagnetic wave permeable metal layer 5.
  • Layer 6 is laminated and fixed.
  • the first background color printed layer 4 of the first background color visible range 21 and the second background color coating layer 6 of the second background color visible range 22 are formed on the transparent base material 2 at positions adjacent to each other in the front view.
  • the back surface 26p and the back surface 26q having different depth positions are formed, and the second background color coating layer 6 in the second background color visible range 22 and the electromagnetic wave permeable metal layer 5 in the electromagnetic wave transparent metal layer visible range 23 are viewed from the surface.
  • the second background color coating layer 6 is provided.
  • the second background color coating layer 6 is entirely on the back side of the first background color printing layer 4 in the first background color visible range 21 and on the back side of the electromagnetic wave permeable metal layer 5 in the electromagnetic wave permeable metal layer visible range 23. It is not limited to the configuration provided over the second background color visible range 22 and at least the back side of the first background color print layer 4 in the first background color visible range 21 located around the second background color visible range 22 and the second background color visible range.
  • the present invention includes any configuration in which the second background color coating layer 6 is provided on the back side of the electromagnetic wave permeable metal layer 5 in the visible range 23 of the electromagnetic wave permeable metal layer located around the range 22.
  • the mark symbol portion 7 which is a character portion or a symbol portion of a mark such as an emblem corresponds to the second background color decorative layer of the second background color visual recognition range 22. It is composed of the second background color coating layer 6 and the electromagnetic wave permeable metal layer 5 in the visible range 23.
  • the mark symbol portion 7 is composed of the second background color decorative layer other than the printing layer of the second background color visible range 22 and the electromagnetic wave permeable metal layer 5 of the electromagnetic wave permeable metal layer visible range 23, or It is preferable that the second background color decorative layer other than the print layer of the two background color visible range 22 is formed, and the second background color decorative layer is a second background color vapor deposition layer in addition to the second background color coating layer 6. Alternatively, the second background color sputter layer or the like may be used.
  • the second background color coating layer 6 is formed on the first background color printing layer 4 of the first background color visible range 21 located around the second background color visual range 22.
  • the electromagnetic wave permeable metal layer 5 is formed on the back surface 26r of the transparent substrate 2, a resin is separately injection-molded to form an inner core, and a discontinuous metal or the like is formed so as to cover the surface of the inner core.
  • a resin is separately injection-molded to form an inner core, and a discontinuous metal or the like is formed so as to cover the surface of the inner core.
  • the first background color printed layer 4 in the first background color visible range 21, the second background color coating layer 6 in the second background color visible range 22, and the electromagnetic wave permeable metal layer in the visible range 23 are examples of the first background color printed layer 4 in the first background color visible range 21, the second background color coating layer 6 in the second background color visible range 22, and the electromagnetic wave permeable metal layer in the visible range 23.
  • the depth of the transparent base material 3 of the three persons is different, so that the visual stereoscopic effect of the marks such as the emblem and the mark forming area shown by the combination of the three persons can be increased, and the three-dimensional visual expression is possible. Can be enriched.
  • the shape of the surface region of the transparent base material 2 on which the mark symbol portion 7 is formed can have three-dimensional unevenness as needed. Further, it is possible to make the edge of the surface area have a right angle, and to make the edge of the surface area an inclined surface, or to form a part of the mark symbol portion 7 on the inclined surface. Is possible. Therefore, it is possible to increase the stereoscopic effect of the mark symbol portion 7 or the mark symbol portion 7 and its surroundings as needed, and it is also possible to increase the variety of stereoscopic visibility.
  • the radome 1 for an on-vehicle radar device of the embodiment can be manufactured by using the manufacturing process shown in FIG. 3, for example.
  • the transparent substrate 2 having the step-shaped back faces 26p, 26q, and 26r is used, and the first background color is printed by printing the first background color on the back face 26p of the transparent substrate 2. 4 are formed (see FIGS. 3A and 3B).
  • the printing process of the first background color can be performed by using an appropriate printing method such as silk screen printing, and the same applies to the manufacturing processes of the first modified example and the second modified example described later. Even when the transparent base layer is provided on the back surface of the transparent base material 2, the same steps as in the present manufacturing step example can be applied.
  • the back surface 26q of the transparent substrate 2 corresponding to the second background color visible range 22 is covered with the photomask 11 to correspond to the electromagnetic wave permeable metal layer visible range 23.
  • the modified surface 25 is formed on the back surface 26r of the transparent base material 2 by light irradiation, and the modified surface 25 is also formed on the back surface of the first background color printing layer 4 corresponding to the back surface 26p of the transparent base material 2 by light irradiation.
  • electroless plating treatment is performed to form the electromagnetic wave permeable metal layer 5 of the discontinuous metal layer on the modified surface 25 and the modified surface on the back surface of the one background color printing layer 4.
  • the modified surface and the electroless plating process In the step of forming the modified surface and the electroless plating process, at least the back surface 26q of the transparent substrate 2 corresponding to the second background color visible range 22 is covered with the photomask 11, and the visible range of the electromagnetic wave permeable metal layer.
  • the modified surface 25 is formed on the rear surface of the transparent substrate 2 corresponding to No. 23 by light irradiation, and further the electroless plating treatment is performed to form the electromagnetic wave permeable metal layer 5 of the discontinuous metal layer on the modified surface 25. Good.
  • the back side of the first background color printing layer 4 is covered with the photomask 11 together with the back surface 26q of the transparent substrate 2, and the back surface 26r of the transparent substrate 2 corresponding to the visible range 23 of the electromagnetic wave transmitting metal layer is irradiated with light. It is also possible to form the modified surface 25 and perform electroless plating to form the electromagnetic wave permeable metal layer 5 of the discontinuous metal layer on the modified surface 25.
  • the first background The radome for an on-vehicle radar device has a structure in which the second background color coating layer 6 is laminated and fixed on the back surface of the color printing layer 4.
  • the light irradiation for forming the modified surface 25 on the back surface 26r of the transparent substrate 2 is directly bonded to the reaction nucleus of the discontinuous metal layer of the electromagnetic wave permeable metal layer 5, or when a chemical solution such as a conditioning solution is used.
  • Any material can be used as long as it can form a reactive functional group that indirectly binds to the reaction nucleus of the discontinuous metal layer of the electromagnetic wave permeable metal layer 5 on the back surface 26r of the transparent substrate 2.
  • ultraviolet irradiation is preferable. Yes, and infrared irradiation is good.
  • the infrared rays are absorbed by the back surface 26r to perform the surface modification, so that the surface modification is performed with a wavelength longer than the visible light region and a transparent resin or the like. It is necessary to irradiate infrared rays in the wavelength band absorbed by the transparent base layer 2 such as the transparent substrate 2 or the transparent resin with the energy density or output required for modification with laser light or the like.
  • the electromagnetic wave transmitting metal layer 5 of the electromagnetic wave transmitting discontinuous metal layer formed by electroless plating is, for example, nickel or nickel alloy, chromium or chromium alloy, cobalt or cobalt alloy, tin or tin alloy, copper or copper. It can be made of alloy, silver or silver alloy, palladium or palladium alloy, platinum or platinum alloy, rhodium or rhodium alloy, gold or gold alloy, or the like.
  • the second background color coating layer 6 is formed by coating with a paint having a color different from that of the first background color over the entire visible range 22 of the background color and the visible range 23 of the electromagnetic wave permeable metal layer.
  • the support member 3 is attached to the back side of the transparent base material 2 on which the first background color printed layer 4, the electromagnetic wave permeable metal layer 5, and the second background color coating layer 6 are formed to complete the on-vehicle radar device radome 1. To do.
  • the first background color printed layer 4 and the electromagnetic wave permeable metal layer 5 the region corresponding to the back surface 26q in the illustrated example
  • the first background color printed layer 4 and the electromagnetic wave permeable metal layer 5 the first region located around the first region. 1 second area on the back side of the background color printing layer 4 (corresponding to the back side of the area where the first background color printing layer 4 and the electromagnetic wave permeable metal layer 5 of FIG.
  • the second background color coating layer 6 may be formed by coating with the above coating.
  • the film formation of the electromagnetic wave permeable metal layer 5 on the surface other than the modified surface is eliminated, the amount of metal used for forming the electromagnetic wave permeable metal layer 5 is reduced, and the manufacturing cost is reduced.
  • valuable metal resources can be effectively used.
  • increase in equipment cost when performing vacuum sputtering or vacuum deposition restrictions on the size and shape of the transparent substrate 2 to be film-formed by the vacuum container, etc. are eliminated, and it is applied to radomes of various shapes at low cost. It becomes possible.
  • the second background color coating layer 6 when the first background color printing layer 4 and the electromagnetic wave permeable metal layer 5 are not coated, the first region is located around the first region.
  • the back surface 26q of the transparent base material 2 corresponding to the second background color visual recognition range 22 is covered with the metal mask 12, and an area including the back surface 26r of the transparent base material 2 corresponding to the electromagnetic wave permeable metal layer visual recognition range 23 is formed.
  • the electromagnetic wave permeable metal layer 5 is formed (see FIGS. 4C and 4D).
  • the back surface 26q of the transparent base material 2 corresponding to the second background color visual range 22 is covered with a metal mask, and the back surface 26r of the transparent base material 2 corresponding to the electromagnetic wave permeable metal layer visual range 23 and the metal mask 12 are covered.
  • the electromagnetic wave permeable metal layer 5 is formed in a region corresponding to the first background color printed layer 5, and the metal mask 12 formed by laminating the electromagnetic wave permeable metal layer 5 is removed.
  • the radome for a vehicle-mounted radar device has a structure in which the second background color coating layer 6 is laminated and fixed on the back surface of the first background color printing layer 4.
  • the electromagnetic wave permeable metal layer 5 can be formed by electroless plating, vapor deposition, sputtering, or the like, and the electromagnetic wave permeable metal layer 5 can be formed by the manufacturing process shown in FIG. It is possible to use the same one as in the example.
  • the coating process (see FIG. 4E) and the mounting process of the support member 3 are performed, and the radome 1 for an in-vehicle radar device is completed.
  • the electromagnetic wave permeable metal layer 5 can be formed by vapor deposition, sputtering, electroless plating or the like, and the flexibility of the manufacturing process can be increased.
  • corresponding effects can be obtained from the configuration corresponding to the manufacturing process example of FIG.
  • the electromagnetic wave permeable metal layer 5 is formed in a region including the back surface 26q of the transparent base material 2 corresponding to the second background color visible range 22 and the back surface 26r of the transparent base material 2 corresponding to the electromagnetic wave permeable metal layer visible range 23. Formed (see FIG. 3C).
  • the back surface 26q of the transparent base material 2 corresponding to the visible range 22 of the second background color and the back surface 26r of the transparent base material 2 corresponding to the visible range 23 of the electromagnetic wave transmitting metal layer are combined with the first background color print.
  • An electromagnetic wave permeable metal layer 5 is also formed on the back surface of the layer 4.
  • the electromagnetic wave permeable metal layer 5 can be formed by an electroless plating process, a vapor deposition process, a sputter process, or the like. It is possible to use the same as in the case of.
  • the electromagnetic wave permeable metal layer 5 formed on the back surface 26q of the transparent substrate 2 corresponding to the second background color visible range 22 is removed by laser irradiation.
  • the removal of the electromagnetic wave permeable metal layer 5 by this laser irradiation uses, for example, a laser beam having a beam diameter of preferably 0.1 ⁇ m to 1000 ⁇ m and a scanning speed of 1 mm / s to 10000 mm / s in the range of the back surface 26q. It is good to scan at high speed and remove.
  • the painting process (see FIG. 5E) and the mounting process of the support member 3 are performed, and the radome 1 for an in-vehicle radar device is completed.
  • the manufacturing process of the second modification it is possible to peel off the electromagnetic wave permeable metal layer 5 in a free shape at high speed and with high precision by laser irradiation, and it is possible to transparently correspond to the second background color visible range 22.
  • the electromagnetic wave permeable metal layer 5 formed on the back surface 26q of the base material 2 is surely removed, and the electromagnetic wave permeable metal layer 5 or a part thereof is prevented from remaining in the second background color visible range 22 by any chance. Therefore, it is possible to secure good visibility of the second background color coating layer 6 in the second background color visibility range 22. Further, the removal treatment of the electromagnetic wave permeable metal layer 5 by laser irradiation can be performed at low cost, and the manufacturing cost can be further reduced.
  • the manufacturing process of the second modified example can be performed without using a mask, and also in this respect, the manufacturing cost can be reduced.
  • the electromagnetic wave permeable metal layer 5 can be formed by vapor deposition, sputtering, electroless plating, etc., and the degree of freedom in the manufacturing process can be increased.
  • corresponding effects can be obtained from the configuration corresponding to the manufacturing process example of FIG.
  • the invention disclosed in the present specification includes, in addition to the inventions and embodiments listed as inventions, a partial content thereof is specified by being changed to other content disclosed in the specification, in an applicable range. Alternatively, those specified by adding other contents disclosed in the present specification to these contents, or those specified as a superordinate concept by deleting these partial contents to the extent that partial effects can be obtained Include.
  • the invention disclosed in the present specification includes the following modifications and added contents.
  • the first background color printing layer 4 in the first background color visible range 21 and the second background color coating layer 6 in the second background color visible range 22 are transparent at the positions adjacent to each other in the surface view.
  • the back surface 26p and the back surface 26q, which have different depth positions of the base material 2 and are preferably different from each other, are formed.
  • the transparent metal layer 5 includes an appropriate configuration in which the depth positions of the transparent base material 2 are substantially different at positions adjacent to each other in the front view, and preferably, the rear surface 26q and the back surface 26r are different from each other. Except for the areas adjacent to each other, the first background color printing layer 4 of the first background color visible range 21 and the second background color coating layer 6 of the second background color visible range 22 have the same depth position. And the second background color of the second background color visible range 22
  • the layer 6, also include those depth position of the electromagnetic wave-permeable metal layer 5 of the electromagnetic wave-permeable metal layer visible range 23 is formed at a position the same.
  • the position in the depth direction of the back surface 26q of the transparent base material 2 corresponding to the second background color visual recognition range 22 is larger than the position in the depth direction of the back surface 26p of the transparent base material 2 corresponding to the first background color visual recognition range 21.
  • the transparent base corresponding to the electromagnetic wave permeable metal layer visual range 23 is located more than the position in the depth direction of the back surface 26q of the transparent substrate 2 corresponding to the second background color visual range 22.
  • the back surface 26r of the material 2 is formed so that the position in the depth direction is located on the back side, and the transparent substrate 2 has the first background color printing layer 4, the electromagnetic wave permeable metal layer 5, and the second background color coating layer 6 formed thereon.
  • those in which are formed are also included (see FIG. 6A).
  • the position in the depth direction of the back surface 26q of the transparent base material 2 corresponding to the second background color visual recognition range 22 is larger than the position in the depth direction of the back surface 26p of the transparent base material 2 corresponding to the first background color visual recognition range 21.
  • the transparent base corresponding to the electromagnetic wave permeable metal layer visual range 23 is located more than the position in the depth direction of the back surface 26q of the transparent substrate 2 corresponding to the second background color visual range 22.
  • the back surface 26r of the material 2 is formed so that the position in the depth direction is located on the front surface side, and the first background color printed layer 4, the electromagnetic wave permeable metal layer 5, and the second background color coating layer 6 are formed on the transparent substrate 2.
  • those formed with are formed (see FIG. 6B).
  • the position in the depth direction of the back surface 26q of the transparent base material 2 corresponding to the second background color visual recognition range 22 is larger than the position in the depth direction of the back surface 26p of the transparent base material 2 corresponding to the first background color visual recognition range 21.
  • the transparent base corresponding to the electromagnetic wave permeable metal layer visual range 23 is located more than the position in the depth direction of the back surface 26q of the transparent substrate 2 corresponding to the second background color visual range 22.
  • the back surface 26r of the material 2 is formed so that the position in the depth direction is located on the back side, and the transparent substrate 2 has the first background color printing layer 4, the electromagnetic wave permeable metal layer 5, and the second background color coating layer 6 formed thereon.
  • those in which are formed are also included (see FIG. 6C).
  • the radome for an on-vehicle radar device of the present invention includes a radome for an on-vehicle radar device having a plurality of different background colors such as one having a third background color other than the first background color and the second background color.
  • the second background color decorative layer that constitutes the second background color visible range is the second background color coating layer 6 that is provided by coating, but the second background color decorative layer in the present invention is used.
  • the layer includes an appropriate decorating layer capable of decorating a second background color different from the first background color, for example, a second background color vapor deposition layer or a second background color sputter layer It is also possible to use a background color decoration layer.
  • the second background color decorative layer is formed by vapor deposition or sputtering instead of the coating process for forming the second background color coating layer 6.
  • the decoration step of forming is performed, and at least the back surface side of the first background color printed layer 4 of the first background color visible range 21 located around the second background color visible range 22 and the second background color visible range 22
  • the second background color decoration layer is also provided on the back surface side of the electromagnetic wave transmitting metal layer 5 in the visible range 23 of the electromagnetic wave transmitting metal layer located in the periphery.
  • the present invention can be used for a radome for an in-vehicle radar device.
  • SYMBOLS 1 ... Radome for vehicle-mounted radar device 2 ... Transparent base material 21 ... 1st background color visible range 22 ... 2nd background color visible range 23 ... Electromagnetic wave permeable metal layer visible range 25 ... Modified surface 26, 26p, 26q, 26r ... Back surface 27 ... Front surface 3 ... Support member 31 ... Frame portion 4 ... First background color printing layer 5 . Electromagnetic wave permeable metal layer 6 ... Second background color coating layer 7 ... Mark symbol portion 11 ... Photomask 12 ... Metal mask

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Details Of Aerials (AREA)
  • Vehicle Waterproofing, Decoration, And Sanitation Devices (AREA)
PCT/JP2019/037061 2018-11-09 2019-09-20 車載レーダー装置用レドーム及びその製造方法 Ceased WO2020095554A1 (ja)

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