WO2020095761A1 - 導電体付き積層体 - Google Patents

導電体付き積層体 Download PDF

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Publication number
WO2020095761A1
WO2020095761A1 PCT/JP2019/042379 JP2019042379W WO2020095761A1 WO 2020095761 A1 WO2020095761 A1 WO 2020095761A1 JP 2019042379 W JP2019042379 W JP 2019042379W WO 2020095761 A1 WO2020095761 A1 WO 2020095761A1
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WIPO (PCT)
Prior art keywords
conductor
laminated body
thickness
substrate
layer
Prior art date
Application number
PCT/JP2019/042379
Other languages
English (en)
French (fr)
Inventor
平松　徹也
龍太 園田
良行 生熊
昌輝 堀江
崚太 奥田
Original Assignee
Ａｇｃ株式会社
エージーシー グラス ユーロップ
エージーシー フラット グラス ノース アメリカ，インコーポレイテッド
エージーシー ヴィドロ ド ブラジル リミターダ
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ａｇｃ株式会社, エージーシー グラス ユーロップ, エージーシー フラット グラス ノース アメリカ，インコーポレイテッド, エージーシー ヴィドロ ド ブラジル リミターダ filed Critical Ａｇｃ株式会社
Priority to CA3117114A priority Critical patent/CA3117114A1/en
Priority to JP2020555984A priority patent/JP7308226B2/ja
Priority to EP19882445.0A priority patent/EP3878645A4/en
Priority to KR1020217011655A priority patent/KR20210091129A/ko
Priority to BR112021006503A priority patent/BR112021006503A2/pt
Priority to EA202190868A priority patent/EA202190868A1/ru
Publication of WO2020095761A1 publication Critical patent/WO2020095761A1/ja
Priority to US17/233,678 priority patent/US11515610B2/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
    • H01P3/08—Microstrips; Strip lines
    • H01P3/081—Microstriplines
    • H01P3/082—Multilayer dielectric
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
    • H01P3/08—Microstrips; Strip lines
    • H01P3/081—Microstriplines
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/003—Coplanar lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P3/00—Waveguides; Transmission lines of the waveguide type
    • H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
    • H01P3/08—Microstrips; Strip lines
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10018—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising only one glass sheet
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B32B17/10045—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets with at least one intermediate layer consisting of a glass sheet
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • 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
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10174—Coatings of a metallic or dielectric material on a constituent layer of glass or polymer
    • B32B17/1022—Metallic coatings
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
    • B32B2307/202—Conductive
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • 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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin 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
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/025—Electric or magnetic properties
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
    • H01P5/085—Coaxial-line/strip-line transitions
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/1271—Supports; Mounting means for mounting on windscreens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna

Definitions

  • the present invention relates to a laminated body with a conductor.
  • a high-frequency transmission line also called a high-speed transmission line
  • a coplanar transmission line in which a conductor (a signal line and a ground line) is provided on one surface of an insulating substrate, or A microstrip type transmission line in which a signal line is provided on one surface of a substrate and a ground line is provided on the other surface of the substrate is known (see Patent Document 1, etc.).
  • Patent Document 2 discloses a three-layer radio wave transmitter that covers an antenna or a radio wave absorber.
  • a general surface finishing material is arranged in the first layer of the outermost layer, air or expanded polystyrene having a relative dielectric constant of 1 to 1.5 is arranged in the second layer, and an acrylic resin or a third layer in the third layer. It is configured by arranging a low dielectric constant material such as vinyl chloride resin.
  • the above-mentioned high-frequency transmission line is obtained by laminating a substrate and a conductor via a so-called intermediate film such as polyvinyl butyral (PVB) or ethylene vinyl acetate (EVA) as an example.
  • PVB polyvinyl butyral
  • EVA ethylene vinyl acetate
  • the above-mentioned interlayer film has a thickness of 0.37 mm even if it is the thinnest, and the difference between the thinnest part and the thickest part is found in the catalog value in manufacturing.
  • there is a variation of about 10% If this variation is large, there is a problem in that the directivity of radio waves may deteriorate during high frequency transmission, or the frequency may shift, making it impossible to obtain sufficient high frequency transmission characteristics.
  • the present invention has been made in view of such circumstances, and an object of the present invention is to provide a laminated body with a conductor that can obtain sufficient high-frequency transmission characteristics.
  • a first aspect of the present invention is a conductor in which a substrate, a functional layer having at least an adhesive layer, a conductor, and a protective material are sequentially laminated in the thickness direction.
  • a second aspect of the present invention provides a substrate having a first surface which is a front surface and a second surface which is a back surface, and at least a first adhesive layer on the first surface of the substrate.
  • a laminate with a conductor in which a conductor and a second protective material are sequentially laminated in the thickness direction, and the thickness of the first functional layer and the second functional layer is 0.300 mm or less.
  • Perspective view of main parts of antenna unit Enlarged sectional view of essential parts of a laminated body with a conductor according to the second embodiment.
  • FIG. 1 is a plan view of an antenna unit 12 to which a laminated body with a conductor 10 according to the first embodiment is applied.
  • FIG. 2 is an enlarged cross-sectional view of the laminated body with a conductor 10 taken along the line 2-2 of FIG.
  • a three-dimensional orthogonal coordinate system in the three-axis directions (X-axis direction, Y-axis direction, Z-axis direction) is used, and is parallel to the long side 12A of the antenna unit 12 configured as a rectangular shape as a whole.
  • the direction is the X-axis direction
  • the direction parallel to the short side 12B orthogonal to the X-axis direction is the Y-axis direction
  • the direction parallel to the thickness direction of the antenna unit 12 orthogonal to the X-axis direction and the Y-axis direction is Z.
  • Axial direction The overall shape of the antenna unit 12 is not limited to a rectangle, but is processed into a shape according to the application.
  • the laminated body 10 with the conductor shown in FIG. 1 is applied to a transmission line for connecting the antenna 14 and the connector 16 in the antenna unit 12 mainly made of a glass plate.
  • the application part of is not limited to the transmission line of the antenna 14, and can be applied to a high-frequency transmission line used for a transmitter or a receiver other than the antenna 14.
  • the antenna 14 is a member that constitutes the antenna unit 12.
  • a metal material forming the antenna 14 a conductive material such as gold, silver or copper can be applied.
  • the antenna 14 preferably has a light transmissive property.
  • the antenna 14 having a light-transmitting property is preferable because it has good designability and can reduce the average solar radiation absorption rate.
  • the connector 16 is connected to an external device (not shown) via, for example, a coaxial cable (not shown), and is connected to an end portion of the antenna unit 12 as shown in a perspective view of a main part of the antenna unit 12 shown in FIG. It is attached to the laminated body 10 with the conductor.
  • the connector 16 includes a connector main body 18 and two pairs of legs 20 extending from the connector main body 18 in the Y-axis direction to sandwich the antenna unit 12 in the thickness direction (Z-axis direction). 20 (see FIG. 3) and conductive pins 22 extending from the connector body 18 in the Y-axis direction.
  • the conductive pin 22 is connected to the conductor 36 of the laminated body 10 with the conductor.
  • the conductor 36 will be described later.
  • the laminated body 10 with the conductor shown in FIG. 2 is provided with the basic components of the second to fourth embodiments described below.
  • the configuration is such that the substrate 30, the functional layer 34 having at least the adhesive layer 32, the conductor 36, and the protective material 38 are sequentially laminated in the thickness direction (Z-axis direction), and the thickness of the functional layer 34 is
  • the thickness T is set to 0.300 mm or less.
  • the substrate 30 can be any substrate used for high frequency applications, antenna applications, and electronic applications.
  • glass, resin, glass resin composite for example, fiber reinforced plastic.
  • ceramics can be applied.
  • the thickness of the substrate 30 is, for example, 0.5 mm to 10.0 mm, preferably 2.5 to 5.0 mm, and more preferably 3.0 mm to 3.5 mm.
  • the thickness of the substrate 30 can be selected depending on the mechanical characteristics and electrical characteristics in mounting.
  • a glass plate is applied as the substrate 30.
  • “to” indicating a numerical range is used to mean that numerical values described before and after the numerical range are included as a lower limit value and an upper limit value.
  • transparent inorganic glass can be exemplified.
  • the inorganic glass include ordinary soda lime glass, borosilicate glass, non-alkali glass, quartz glass and the like.
  • the molding method is also not particularly limited, and examples thereof include a float plate glass manufactured by the float method. Further, a colorless and transparent material to which no coloring component is added may be used, or a colored and transparent material may be used.
  • Examples of the resin applied to the substrate 30 include polyethylene terephthalate (PET), polyethylene, and polyimide.
  • PET polyethylene terephthalate
  • polyethylene polyethylene
  • polyimide polyimide
  • the functional layer 34 mainly has the adhesive layer 32, and the conductor 36 is adhered to the substrate 30 by the adhesive layer 32.
  • the thickness of the functional layer 34 is preferably 0.010 mm or more, more preferably 0.020 mm or more.
  • the thickness of the functional layer 34 is 0.010 mm or more, there is sufficient mechanical strength (for example, shear fracture strength).
  • the upper limit of the thickness of the functional layer 34 is not particularly limited, but may be 0.10 mm or less, 0.050 mm or less, and 0.030 mm or less.
  • an optically transparent adhesive agent is applied as the adhesive layer 32.
  • the adhesive layer 32 has transparency and transparency, and the design of the laminated body 10 with the conductor is good.
  • the optically transparent adhesive agent include sheet-shaped materials called OCA (Optical Clear Adhesive) such as acrylic, silicone, and urethane materials.
  • the conductor 36 for example, a conductor made of a conductive material such as gold, silver, copper, aluminum, chromium or molybdenum can be applied.
  • the thickness of the conductor 36 is not particularly limited, but is, for example, 0.002 mm to 0.020 mm. When the thickness of the conductor 36 is 0.002 mm or more, a low resistance value suitable for a high frequency circuit including an antenna can be obtained. Further, if the thickness of the conductor 36 is 0.020 mm or less, patterning by etching or the like is easy. In this embodiment, a copper conductor is used as the conductor 36.
  • the conductor 36 may be formed in a mesh shape.
  • the mesh means a state in which mesh-shaped through holes are formed in the plane of the conductor 36.
  • the mesh When the conductor 36 is formed in a mesh shape, the mesh may have a square shape or a diamond shape. When the mesh eyes are formed in a square shape, the mesh eyes are preferably square. If the mesh has a square shape, the design is good. Also, a random shape by a self-assembly method may be used. Moiré can be prevented by using a random shape.
  • the line width of the mesh is preferably 5 to 30 ⁇ m, more preferably 6 to 15 ⁇ m.
  • the line spacing of the mesh is preferably 50 to 500 ⁇ m, more preferably 100 to 300 ⁇ m.
  • the thickness of the adhesive layer 32 is preferably larger than the thickness of the conductor 36. If the thickness of the adhesive layer 32 is thicker than the thickness of the conductor 36, the optically transparent adhesive will easily enter the mesh eyes, and the transparency and the transparency of the conductor-equipped laminate 10 will be improved.
  • the attached laminate 10 has good design.
  • the aperture ratio of the conductor 36 is preferably 80% or more, more preferably 90% or more.
  • the aperture ratio is the ratio of the area of the openings per area including the openings of the conductor 36.
  • the protective material 38 is a plate-shaped body that protects the conductor 36, and is adhered to the conductor 36 via an intermediate film 40 such as polyvinyl butyral or ethylene vinyl acetate. That is, according to the laminated body 10 with the conductor, the protective material 38 is laminated on the conductor 36 via the intermediate film 40 in order to protect the conductor 36.
  • the protective material 38 is not limited to the intermediate film 40, and the protective material 38 may be adhered to the conductor 36 using another adhesive such as an optically transparent adhesive.
  • the thickness of the intermediate film 40 when the intermediate film 40 is used is 0.37 mm, for example.
  • the other adhesive such as the intermediate film 40 or the optically transparent adhesive or the like may include a UV absorber. By including the ultraviolet absorber, deterioration of the functional layer 34 due to ultraviolet rays can be prevented.
  • the protective material 38 for example, glass such as soda lime glass, alkali-free glass, borosilicate glass, polyethylene terephthalate (PET), resin such as polyethylene, glass resin composite (for example, fiber reinforced plastic) or ceramics can be applied. Is.
  • the protective material 38 can prevent deterioration of the functional layer 34 due to ultraviolet rays, moisture (water vapor), and water, and damage and destruction of the functional layer 34 due to mechanical contact.
  • the thickness of the protective material 38 is, for example, 0.05 mm to 5.0 mm. When the thickness of the protective material 38 is 0.05 mm or more, it is possible to prevent the above-described deterioration of the functional layer 34 and damage and destruction of the functional layer 34 due to mechanical contact.
  • the thickness of the protective material 38 may be 0.10 mm or more, 0.50 mm or more, and 1.0 mm or more. If the thickness of the protective material 38 is 5.0 mm or less, it is possible to suppress the influence of impedance mismatch with the air, which is caused by providing the protective material.
  • the thickness of the protective material 38 may be 3.0 mm or less, or 2.0 mm or less.
  • a glass plate is used as the protective material 38.
  • the material of the glass plate applied to the protective material 38 is also the same as the material of the glass plate applied to the substrate 30, and thus the description thereof will be omitted.
  • a film-shaped resin such as polyethylene terephthalate (PET) or polyethylene having a thickness of 0.05 mm to 0.20 mm may be applied.
  • the laminate 10 with the conductor of the first embodiment will be compared with the conventional laminate 10 with the conductor in which the conductor is adhered to the substrate by the intermediate film.
  • the functional layer 34 is a constituent element of the laminated body 10 with a conductor corresponding to the conventional intermediate film.
  • the thickness T of this functional layer 34 is 0.020 mm to 0.050 mm, and since it is configured to be 0.300 mm or less, it is thinner than the thickness of the interlayer film (0.37 mm or more). Thickness variation is small. Therefore, according to the laminated body 10 with the conductor of the first embodiment having such a functional layer 34, the directivity of the radio wave of high frequency transmission is higher than that of the conventional laminated body with the conductor using the intermediate film. Since it is improved and the frequency shift can be suppressed, a sufficient high frequency transmission characteristic can be obtained.
  • the intermediate film expands and contracts, so that sagging (a portion inclined with respect to the surface of the substrate) is generated at the end of the intermediate film, or it is extended to the outside from the end of the substrate. There is a case where it sticks out or contracts and retracts inward from the edge of the substrate.
  • an optically transparent adhesive is used as the adhesive layer 32. Since the adhesive layer 32 does not expand and contract, the conductor 36 and the conductive pin 22 can be reliably connected.
  • FIG. 4 is an enlarged cross-sectional view of a main part of the laminated body 50 with a conductor according to the second embodiment.
  • the same or similar members as those of the laminated body with a conductor 10 according to the first embodiment described in FIG. 2 will be denoted by the same reference numerals.
  • the conductor 36 having a thickness of 20 ⁇ m or less (for example, 10 ⁇ m) is applied.
  • the laminated body 56 in which the conductor 36 is bonded to the resin plate 52 with the adhesive 54 is used.
  • the conductor 36 is patterned in the form of a transmission line in the state of the laminated body 56, and then the resin plate 52 is bonded to the substrate 30 via the adhesive layer 32.
  • the conductor 36 When the conductor 36 is less than 10 ⁇ m (for example, 5 ⁇ m), the conductor 36 may be directly provided on the resin plate 52 by vapor deposition or the like instead of using the adhesive 54.
  • the functional layer 34 is configured by the adhesive layer 32, the resin plate 52, and the adhesive 54
  • the reinforcing layer 58 for the conductor 36 is configured by the resin plate 52 and the adhesive 54.
  • the resin plate 52 for example, a plate-shaped body made of polyethylene terephthalate, polyethylene or polyimide and having a thickness of 0.05 to 0.20 mm can be applied. In this embodiment, a 0.10 mm polyethylene terephthalate plate is used.
  • the resin plate 52 is preferably made of a material having a high melting point and high heat resistance so as not to be deformed at high temperatures, and polyethylene terephthalate (melting point is about 225 ° C.) and polyimide are more preferable.
  • the adhesive 54 an acrylic adhesive having a thickness of 0.005 mm to 0.02 mm (for example, 0.01 mm) can be exemplified. Other examples of the adhesive 54 include silicone-based adhesives and urethane-based material adhesives.
  • the thickness of the reinforcing layer 58 is preferably 0.06 mm to 0.22 mm.
  • the thickness of the functional layer 34 including the adhesive layer 32, the resin plate 52, and the adhesive 54 is 0.135 mm, which is 0.300 mm or less. It is thinner than the thickness (0.37 mm or more), and its thickness variation is small. Therefore, also in the laminated body 50 with the conductor of the second embodiment, the directivity of the radio wave of the high frequency transmission is improved and the deviation of the frequency is suppressed as compared with the conventional laminated body with the conductor using the intermediate film. Therefore, sufficient high frequency transmission characteristics can be obtained.
  • FIG. 5 is an enlarged sectional view of an essential part of a laminated body 60 with a conductor according to the third embodiment.
  • the same or similar members as those of the laminated body 10 with the conductor according to the first embodiment described in FIG. 2 will be denoted by the same reference numerals.
  • the laminated body 60 with the conductor has a functional layer (first layer of the present invention) having at least an adhesive layer (corresponding to the first adhesive layer of the present invention) 32 on the surface 30A of the substrate 30 (corresponding to the first surface of the present invention).
  • a functional layer) 34, a conductor (corresponding to the first conductor of the invention) 36, and a protective material (corresponding to the first protective material of the invention) are sequentially laminated in the thickness direction.
  • a functional layer (corresponding to the second functional layer of the present invention) 34 having at least an adhesive layer (corresponding to the second adhesive layer of the present invention) 32 on the back surface (corresponding to the second surface of the present invention) 30B of the substrate 30.
  • a conductor (corresponding to the second conductor of the present invention) 36, and a protective material (corresponding to the second protective material of the present invention) 38 are sequentially laminated in the thickness direction.
  • the thickness of each of the functional layers 34, 34 is set to 0.300 mm or less.
  • the thickness thereof is 0.020 mm to 0.030 mm, preferably 0.025 mm.
  • the thickness of each of the functional layers 34, 34 is, for example, 0.025 mm, which is 0.300 mm or less. Therefore, the conductor-equipped laminate of the first and second embodiments. Similar to the bodies 10 and 50, sufficient high frequency transmission characteristics can be obtained.
  • FIG. 6 is an enlarged cross-sectional view of a main part of the laminated body with a conductor 70 according to the fourth embodiment.
  • the laminated body with conductor 70 the same as the laminated body with conductor 50 according to the second embodiment described in FIG. 4 and the laminated body 60 with conductor according to the third embodiment described in FIG. Alternatively, similar members will be described with the same reference numerals.
  • the laminated body with conductor 70 is provided with the functional layer 34 on the surface 30A side of the substrate 30.
  • the functional layer 34 includes an adhesive layer 32 and a reinforcing layer (corresponding to the first reinforcing layer of the present invention) 58 including the resin plate 52 and the adhesive 54. Further, the functional layer 34 is provided on the back surface 30B side of the substrate 30.
  • the functional layer 34 includes an adhesive layer 32 and a reinforcement layer (corresponding to a second reinforcement layer of the present invention) 58 including a resin plate 52 and an adhesive 54.
  • the thickness of each of the functional layers 34, 34 is set to 0.300 mm or less.
  • the thickness of the functional layer 34 including the adhesive layer 32, the resin plate 52, and the adhesive 54 is 0.135 mm, which is 0.300 mm or less. Similar to the laminated body with conductor 10, 50, 60 of the third embodiment, sufficient high frequency transmission characteristics can be obtained.

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  • Laminated Bodies (AREA)
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  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Non-Insulated Conductors (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)

Abstract

本発明の導電体付き積層体１０は、基板３０と、少なくとも接着層３２を有する機能層３４と、導電体３６と、保護材３８とがそれぞれ厚さ方向（Ｚ軸方向）に順に積層されており、機能層３４の厚さＴが０．３００ｍｍ以下に構成される。

Description

導電体付き積層体
　本発明は、導電体付き積層体に関する。
　近年、無線通信の高速化及び大容量化を図るため、第４世代移動通信システム（４Generation）及び第５世代移動通信システム（５Generation）用の周波数帯のように、使用する周波数帯域の高周波化が進められている。アンテナ、送信機又は受信機等で用いられる高周波伝送路（高速伝送線路とも言う。）として、絶縁性の基板の片面に伝導体（信号線とグランド線）が備えられたコプレーナ型伝送路、又は基板の一方の片面に信号線が備えられ、他方の片面にグランド線が備えられたマイクロストリップ型伝送路等が知られている（特許文献１等参照）。
　また、特許文献２には、アンテナ又は電波吸収体を被覆する３層構造の電波透過体が開示されている。この電波透過体は、最外層の第１層に一般の表面仕上げ材が配され、第２層に比誘電率１から１．５の空気又は発砲スチロールが配され、第３層にアクリル樹脂又は塩化ビニル樹脂等の低誘電率材が配されて構成されている。
特開２００８－２２７７２０号公報 特開平６－１９６９１５号公報
　従来、上記のような高周波伝送路は、一例として、ポリビニルブチラール（ＰＶＢ：Polyvinyl Butylal）又はエチレン酢酸ビニル（ＥＶＡ：Ethylene-Vinyl Acetate）等のいわゆる中間膜を介して基板と導電体とを積層することにより構成される場合がある。しかしながら、上記の中間膜は厚さが最も薄いものでも０．３７ｍｍの厚さがあることが知られており、製造上、厚さが最も薄い部分と最も厚い部分との差が、カタログ値に対して１０％程度のばらつきがある。このばらつきが大きい場合には、高周波の伝送の際に電波の指向性が悪化したり、周波数がずれたりして十分な高周波伝送特性を得ることができないという問題があった。
　本発明は、このような事情に鑑みてなされたもので、十分な高周波伝送特性を得ることができる導電体付き積層体を提供することを目的とする。
　本発明の第１の形態は、本発明の目的を達成するために、基板と、少なくとも接着層を有する機能層と、導電体と、保護材とがそれぞれ厚さ方向に順に積層された導電体付き積層体であって、機能層の厚さが０．３００ｍｍ以下である、導電体付き積層体を提供する。
　本発明の第２の形態は、本発明の目的を達成するために、表面である第１面及び裏面である第２面を有する基板と、基板の第１面に、少なくとも第１接着層を有する第１機能層と、第１導電体と、第１保護材とがそれぞれ厚さ方向に順に積層され、基板の第２面に、少なくとも第２接着層を有する第２機能層と、第２導電体と、第２保護材とがそれぞれ厚さ方向に順に積層され、第１機能層及び第２機能層の厚さが０．３００ｍｍ以下である、導電体付積層体を提供する。
　本発明によれば、十分な高周波伝送特性を得ることができる。
第１実施形態に係る導電体付き積層体が適用されたアンテナユニットの平面図 図１の２－２線に沿う導電体付き積層体の拡大断面図 アンテナユニットの要部斜視図 第２実施形態に係る導電体付き積層体の要部拡大断面図 第３実施形態に係る導電体付き積層体の要部拡大断面図 第４実施形態に係る導電体付き積層体の要部拡大断面図
　以下、添付図面に従って本発明に係る導電体付き積層体の好ましい実施形態を説明する。
　図１は、第１実施形態に係る導電体付き積層体１０が適用されたアンテナユニット１２の平面図である。図２は、図１の２－２線に沿う導電体付き積層体１０の拡大断面図である。
　以下の説明では、理解の容易のため、図面における各部材の縮尺が実際とは異なる場合がある。また、本明細書では、３軸方向（Ｘ軸方向、Ｙ軸方向、Ｚ軸方向）の三次元直交座標系を用い、全体形状として長方形に構成されたアンテナユニット１２の長辺１２Ａと平行な方向をＸ軸方向とし、Ｘ軸方向に直交する短辺１２Ｂと平行な方向をＹ軸方向とし、Ｘ軸方向及びＹ軸方向にそれぞれ直交するアンテナユニット１２の厚さ方向と平行な方向をＺ軸方向とする。なお、アンテナユニット１２の全体形状は、長方形に限定されるものではなく、用途に応じた形状に加工されるものである。
　図１に示す導電体付き積層体１０は、主としてガラス板からなるアンテナユニット１２において、アンテナ１４とコネクタ１６とを接続するための伝送路に適用されたものであるが、導電体付き積層体１０の適用箇所はアンテナ１４の伝送路に限定されるものではなく、アンテナ１４以外の送信機又は受信機等に用いられる高周波伝送路に適用可能である。なお、アンテナ１４はアンテナユニット１２を構成する一部材である。アンテナ１４を構成する金属材料としては、金、銀又は銅等の導電性材料を適用可能である。また、アンテナ１４は、光透過性を有することが好ましい。光透過性を有するアンテナ１４であれば、意匠性がよく、また、平均日射吸収率を低下させることができるので好ましい。
　コネクタ１６は、例えば同軸ケーブル（不図示）を介して外部機器（不図示）に接続されており、図３に示すアンテナユニット１２の要部斜視図に示すように、アンテナユニット１２の端部に位置する導電体付き積層体１０に取り付けられる。図２に示すように、コネクタ１６は、コネクタ本体１８と、コネクタ本体１８からＹ軸方向に延設されてアンテナユニット１２を厚さ方向（Ｚ軸方向）で挟持する二対の脚部２０、２０…（図３参照）と、コネクタ本体１８からＹ軸方向に延設された導電ピン２２と、を備える。コネクタ１６が上記の位置に取り付けられると、導電ピン２２が導電体付き積層体１０の導電体３６に接続される。導電体３６については後述する。
　図２に示す導電体付き積層体１０は、以下に説明する第２乃至第４実施形態の基本となる構成要素を備えるものである。その構成は、基板３０と、少なくとも接着層３２を有する機能層３４と、導電体３６と、保護材３８とがそれぞれ厚さ方向（Ｚ軸方向）に順に積層されており、機能層３４の厚さＴが０．３００ｍｍ以下に構成されている。
　具体的な構成について説明すると、基板３０としては、高周波用途、アンテナ用途、電子用途に使われる基板であれば使用可能であり、例えば、ガラス、樹脂、ガラス樹脂複合体(例えば、繊維強化プラスチック)又はセラミックスを適用可能である。基板３０の厚さは、一例として０．５ｍｍ～１０．０ｍｍであり、好ましくは２．５～５．０ｍｍであり、さらに好ましくは３．０ｍｍ～３．５ｍｍである。基板３０の厚さは、実装における機械的特性、電気的特性により選定することができる。本実施形態では、基板３０として、ガラス板が適用されている。なお、本明細書において、数値範囲を示す「～」とはその前後に記載される数値を下限値及び上限値として含む意味で使用する。
　基板３０に適用されるガラス板としては、透明な無機ガラスを例示することができる。無機ガラスとしては、通常のソーダライムガラス、ホウ珪酸ガラス、無アルカリガラス又は石英ガラス等を例示することができる。成形法についても特に限定されないが、例えば、フロート法によって製造されたフロート板ガラスを例示することができる。また、着色成分を添加しない無色透明な材質を用いてもよく、あるいは、着色された着色透明な材質を用いてもよい。
　基板３０に適用される樹脂としては、ポリエチレンテレフタレート（ＰＥＴ）、ポリエチレン、ポリイミドを例示することができる。
　機能層３４は、主として接着層３２を有し、この接着層３２によって導電体３６が基板３０に接着される。図２に示すように、機能層３４が接着層３２のみによって構成されている場合には、機能層３４の厚さは、０．０１０ｍｍ以上が好ましく、０．０２０ｍｍ以上がより好ましい。機能層３４の厚さが０．０１０ｍｍ以上であれば、十分な機械的強度（例えば、せん断破壊強度）がある。また、機能層３４の厚さの上限は特に限定されないが、０．１０ｍｍ以下であってよく、０．０５０ｍｍ以下であってよく、０．０３０ｍｍ以下であってよい。本実施形態では、接着層３２として、光学透明粘接着剤が適用されている。接着層３２として光学透明粘接着剤を用いることにより、接着層３２は透明性、透視性を有し、導電体付き積層体１０の意匠性がよい。光学透明粘接着剤としては、ＯＣＡ（Optical Clear Adhesive）と呼ばれるシート状のアクリル系、シリコーン系、ウレタン系等の材料が挙げられる。
　導電体３６としては、例えば金、銀、銅、アルミニウム、クロム又はモリブデン等の導電性材料により構成された導電体を適用可能である。導電体３６の厚さは、特に限定されるものではないが、一例として０．００２ｍｍ～０．０２０ｍｍである。導電体３６の厚さが０．００２ｍｍ以上であれば、アンテナを含む高周波回路に適した低い抵抗値を得ることができる。また、導電体３６の厚さが０．０２０ｍｍ以下であれば、エッチング等によるパターニングがしやすい。本実施形態では、導電体３６として、銅製の導電体が適用されている。
　導電体３６は、メッシュ状に形成されてもよい。ここで、メッシュとは、導電体３６の平面に網目状の透孔が空いた状態をいう。導電体３６をメッシュ状に形成することにより、導電体３６は透視性、透光性を有し、導電体付き積層体１０の意匠性がよい。
　導電体３６がメッシュ状に形成される場合、メッシュの目は方形であってもよく、菱形であってもよい。メッシュの目を方形に形成する場合、メッシュの目は正方形であることが好ましい。メッシュの目が正方形であれば、意匠性が良い。また、自己組織化法によるランダム形状でもよい。ランダム形状にすることでモアレを防ぐことができる。メッシュの線幅は、５～３０μｍが好ましく、６～１５μｍがより好ましい。メッシュの線間隔は、５０～５００μｍが好ましく、１００～３００μｍがより好ましい。
　導電体３６がメッシュ状に形成され、接着層３２が光学透明粘接着剤である場合、接着層３２の厚さは、導電体３６の厚さよりも厚いことが好ましい。接着層３２の厚さが導電体３６の厚さよりも厚ければ、メッシュの目に光学透明粘接着剤が入り込みやすく、導電体付き積層体１０の透明性、透視性が向上し、導電体付き積層体１０の意匠性がよい。
　導電体３６の開口率は、８０％以上が好ましく、９０％以上がより好ましい。開口率は、導電体３６の開口部を含めた面積当たりの開口部の面積の割合である。
　保護材３８は、導電体３６を保護する板状体であり、例えば、ポリビニルブチラール又はエチレン酢酸ビニル等の中間膜４０を介して導電体３６に接着される。すなわち、導電体付き積層体１０によれば、導電体３６を保護するために中間膜４０を介して保護材３８が導電体３６に積層されている。なお、中間膜４０に限定されず、光学透明粘接着剤等のような他の粘着剤を用いて保護材３８を導電体３６に接着してもよい。中間膜４０を使用した場合の中間膜４０の厚さは、例えば０．３７ｍｍである。また、中間膜４０または光学透明粘接着剤等のような他の粘着剤には、紫外線吸収剤を含んでもよい。紫外線吸収剤を含むことにより、紫外線による機能層３４の劣化を防ぐことができる。
　保護材３８としては、例えば、ソーダライムガラス、無アルカリガラス、ボロシリケートガラス等のガラス、ポリエチレンテレフタレート（ＰＥＴ）、ポリエチレン等の樹脂、ガラス樹脂複合体(例えば、繊維強化プラスチック)又はセラミックスを適用可能である。保護材３８により、紫外線、湿気（水蒸気）、水による機能層３４の劣化、機械的接触による機能層３４の損傷、破壊を防ぐことができる。この保護材３８の厚さは、一例として０．０５ｍｍ～５．０ｍｍである。保護材３８の厚さが０．０５ｍｍ以上であれば、上述した機能層３４の劣化、機械的接触による機能層３４の損傷、破壊を防ぐことができる。保護材３８の厚さは、０．１０ｍｍ以上であってもよく、０．５０ｍｍ以上であってもよく、１．０ｍｍ以上であってもよい。また、保護材３８の厚さが５．０ｍｍ以下であれば、保護材を設けることにより生じる空気とのインピーダンスの不整合の影響を抑えることができる。保護材３８の厚さは、３．０ｍｍ以下であってもよく、２．０ｍｍ以下であってもよい。本実施形態では、保護材３８として、ガラス板が適用されている。なお、保護材３８に適用されるガラス板の材質も、基板３０に適用されるガラス板の材質と同様なので説明は省略する。
　また、保護材３８としては、厚さが０．０５ｍｍ～０．２０ｍｍのフィルム状のポリエチレンテレフタレート（ＰＥＴ）、ポリエチレン等の樹脂を適用してもよい。
　ここで、第１実施形態の導電体付き積層体１０と、中間膜によって導電体を基板に接着する従来の導電体付き積層体とを比較する。
　従来の中間膜に対応する導電体付き積層体１０の構成要素は機能層３４である。この機能層３４の厚さＴは、０．０２０ｍｍ～０．０５０ｍｍであり、０．３００ｍｍ以下の厚さに構成されているので、中間膜の厚さ(０．３７ｍｍ以上)よりも薄く、その厚さのばらつきも小さい。したがって、このような機能層３４を有する第１実施形態の導電体付き積層体１０によれば、中間膜を使用する従来の導電体付き積層体と比較して、高周波伝送の電波の指向性が改善され、また周波数のずれも抑えることができるので、十分な高周波伝送特性を得ることができる。
　なお、接着剤として中間膜を使用した場合、中間膜は伸縮するため中間膜の端部にダレ（基板の面に対して傾斜した部分）が生じたり、伸長して基板の端部から外側にはみ出したり、収縮して基板の端部から内側に引っ込んだりする場合がある。このようなダレ、はみだし、引っ込みが生じると、導電体と導電ピン２２との接続に不具合が生じる場合があるが、本実施形態のように接着層３２として光学透明粘接着剤を使用したものは接着層３２が伸縮しないので、導電体３６と導電ピン２２とを確実に接続することができる。
　図４は、第２実施形態に係る導電体付き積層体５０の要部拡大断面図である。この導電体付き積層体５０を説明するに際し、図２で説明した第１実施形態に係る導電体付き積層体１０と同一若しくは類似の部材については同一の符号を付して説明する。
　図４に示す導電体付き積層体５０は、厚さが２０μｍ以下（例えば、１０μｍ）の導電体３６が適用されている。このように厚さの薄い導電体３６の場合には、この導電体３６を基板３０に接着層３２を介して直接接着して伝送路の形態にパターニングすることは難しい。そこで、このような場合には、樹脂板５２に導電体３６を接着剤５４により接着した積層体５６が用いられる。導電体３６は、積層体５６の状態で伝送路の形態にパターニングされ、その後、樹脂板５２が接着層３２を介して基板３０に接着される。導電体３６が１０μｍ未満（例えば、５μｍ）の場合、接着剤５４を用いる代わりに、樹脂板５２に導電体３６を蒸着などにより、直接設けてもよい。第２実施形態の導電体付き積層体５０では、接着層３２、樹脂板５２及び接着剤５４によって機能層３４が構成され、樹脂板５２及び接着剤５４によって導電体３６に対する補強層５８が構成される。
　樹脂板５２としては、例えば、ポリエチレンテレフタラート製、ポリエチレン製又はポリイミド製で厚さが０．０５～０．２０ｍｍの板状体を適用可能である。本実施形態では０．１０ｍｍのポリエチレンテレフタラートの板状体を用いた。導電体付き積層体５０が導電体３６と保護材３８との間に中間膜４０を有する場合に、導電体付き積層体５０の製造工程において、樹脂板５２は高温になる。樹脂板５２は、高温下で変形しないように、融点が高く、耐熱性の良い材料が好ましく、ポリエチレンテレフタラート（融点は約２２５℃）、ポリイミドがより好ましい。また、接着剤５４としては、厚さが０．００５ｍｍ～０．０２ｍｍ（例えば、０．０１ｍｍ）のアクリル系接着剤を例示することができる。また、接着剤５４としては、他にシリコーン系接着剤、ウレタン系材料接着剤を例示することができる。
　補強層５８の厚さは、０．０６ｍｍ～０．２２ｍｍが好ましい。
　第２実施形態の導電体付き積層体５０においても、接着層３２、樹脂板５２及び接着剤５４からなる機能層３４の厚さは例えば０．１３５ｍｍであり、０．３００ｍｍ以下なので、中間膜の厚さ(０．３７ｍｍ以上)よりも薄く、その厚さのばらつきも小さい。したがって、第２実施形態の導電体付き積層体５０においても、中間膜を使用する従来の導電体付き積層体と比較して、高周波伝送の電波の指向性が改善され、また周波数のずれも抑えることができるので、十分な高周波伝送特性を得ることができる。
　図５は、第３実施形態に係る導電体付き積層体６０の要部拡大断面図である。この導電体付き積層体６０を説明するに際し、図２で説明した第１実施形態に係る導電体付き積層体１０と同一若しくは類似の部材については同一の符号を付して説明する。
　導電体付き積層体６０は、基板３０の表面（本発明の第１面に相当）３０Ａに、少なくとも接着層（本発明の第１接着層に相当）３２を有する機能層（本発明の第１機能層に相当）３４と、導電体（本発明の第１導電体に相当）３６と、保護材（本発明の第１保護材に相当）とがそれぞれ厚さ方向に順に積層されている。また、基板３０の裏面（本発明の第２面に相当）３０Ｂに、少なくとも接着層（本発明の第２接着層に相当）３２を有する機能層（本発明の第２機能層に相当）３４と、導電体（本発明の第２導電体に相当）３６と、保護材（本発明の第２保護材に相当）３８とがそれぞれ厚さ方向に順に積層されている。そして、各々の機能層３４、３４の厚さが０．３００ｍｍ以下に構成されている。
　また、導電体付き積層体６０の機能層３４、３４は、接着層３２のみから構成されているので、その厚さは０．０２０ｍｍ～０．０３０ｍｍであり、好適には０．０２５ｍｍである。
　第３実施形態の導電体付き積層体６０においても、機能層３４、３４の各々の厚さは例えば０．０２５ｍｍであり、０．３００ｍｍ以下なので、第１及び第２実施形態の導電体付き積層体１０、５０と同様に十分な高周波伝送特性を得ることができる。
　図６は、第４実施形態に係る導電体付き積層体７０の要部拡大断面図である。この導電体付き積層体７０を説明するに際し、図４で説明した第２実施形態に係る導電体付き積層体５０、及び図５で説明した第３実施形態に係る導電体付き積層体６０と同一若しくは類似の部材については同一の符号を付して説明する。
　導電体付き積層体７０は、基板３０の表面３０Ａ側に、機能層３４が備えられている。この機能層３４は、接着層３２と、樹脂板５２及び接着剤５４からなる補強層（本発明の第１補強層に相当）５８と、を備えている。また、基板３０の裏面３０Ｂ側に、機能層３４が備えられている。この機能層３４は、接着層３２と、樹脂板５２及び接着剤５４からなる補強層（本発明の第２補強層に相当）５８と、を備えている。そして、各々の機能層３４、３４の厚さが０．３００ｍｍ以下に構成されている。
　第４実施形態の導電体付き積層体７０においても、接着層３２、樹脂板５２及び接着剤５４からなる機能層３４の厚さは例えば０．１３５ｍｍであり、０．３００ｍｍ以下なので、第１乃至第３実施形態の導電体付き積層体１０、５０、６０と同様に十分な高周波伝送特性を得ることができる。
　以上、本発明の実施形態について説明したが、本発明は、以上の例には限定されず、本発明の要旨を逸脱しない範囲において、各種の改良や変形を行ってもよいのはもちろんである。
　本国際特許出願は、２０１８年１１月６日に出願した日本国特許出願第２０１８－２０９０１１号に基づきその優先権を主張するものであり、日本国特許出願第２０１８－２０９０１１号の全内容を参照によりここに援用する。
　１０…導電体付き積層体、１２…アンテナユニット、１４…アンテナ、１６…コネクタ、１８…コネクタ本体、２０…脚部、２２…導電ピン、３０…基板、３０Ａ…表面、３０Ｂ…裏面、３２…接着層、３４…機能層、３６…導電体、３８…保護材、４０…中間膜、５０…導電体付き積層体、５２…樹脂板、５４…接着剤、５６…積層体、５８…補強層、６０…導電体付き積層体、７０…導電体付き積層体

Claims (15)

  1. 　基板と、少なくとも接着層を有する機能層と、導電体と、保護材とがそれぞれ厚さ方向に順に積層された導電体付き積層体であって、
    　前記機能層の厚さが０．３００ｍｍ以下である、導電体付き積層体。
  2. 　前記機能層は、前記接着層と、前記導電体を補強する補強層とを備える、請求項１に記載の導電体付き積層体。
  3. 　前記補強層の厚さは０．０６ｍｍ以上である、請求項２に記載の導電体付き積層体。
  4. 　前記接着層は光学透明粘接着剤である、請求項１から３のいずれか１項に記載の導電体付き積層体。
  5. 　前記基板はガラス板である、請求項１から４のいずれか１項に記載の導電体付き積層体。
  6. 　前記基板は樹脂である、請求項１から４のいずれか１項に記載の導電体付き積層体。
  7. 　前記保護材はガラス板である、請求項１から６のいずれか１項に記載の導電体付き積層体。
  8. 　前記保護材は樹脂である、請求項１から６のいずれか１項に記載の導電体付き積層体。
  9. 　表面である第１面及び裏面である第２面を有する基板と、
    　前記基板の前記第１面に、少なくとも第１接着層を有する第１機能層と、第１導電体と、第１保護材とがそれぞれ厚さ方向に順に積層され、
    　前記基板の前記第２面に、少なくとも第２接着層を有する第２機能層と、第２導電体と、第２保護材とがそれぞれ厚さ方向に順に積層され、
    　前記第１機能層及び第２機能層の厚さが０．３００ｍｍ以下である、導電体付き積層体。
  10. 　前記第１機能層は、前記第１接着層と、前記第１導電体を補強する第１補強層とを備え、
    　前記第２機能層は、前記第２接着層と、前記第２導電体を補強する第２補強層とを備える、請求項９に記載の導電体付き積層体。
  11. 　前記第１接着層及び前記第２接着層は光学透明粘接着剤である、請求項９又は１０に記載の導電体付き積層体。
  12. 　前記基板はガラス板である、請求項９から１１のいずれか１項に記載の導電体付き積層体。
  13. 　前記基板は樹脂である、請求項９から１１のいずれか１項に記載の導電体付き積層体。
  14. 　前記第１保護材及び前記第２保護材はガラス板である、請求項９から１３のいずれか１項に記載の導電体付き積層体。
  15. 　前記第１保護材及び前記第２保護材は樹脂である、請求項９から１３のいずれか１項に記載の導電体付き積層体。
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JPWO2020095761A1 (ja) 2021-10-14
KR20210091129A (ko) 2021-07-21
EP3878645A4 (en) 2022-07-27
BR112021006503A2 (pt) 2021-07-06
US11515610B2 (en) 2022-11-29
CA3117114A1 (en) 2020-05-14
US20210242553A1 (en) 2021-08-05
EP3878645A1 (en) 2021-09-15
JP7308226B2 (ja) 2023-07-13
EA202190868A1 (ru) 2021-08-16

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