WO2024157396A1 - シールドフラットケーブル - Google Patents

シールドフラットケーブル Download PDF

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Publication number
WO2024157396A1
WO2024157396A1 PCT/JP2023/002305 JP2023002305W WO2024157396A1 WO 2024157396 A1 WO2024157396 A1 WO 2024157396A1 JP 2023002305 W JP2023002305 W JP 2023002305W WO 2024157396 A1 WO2024157396 A1 WO 2024157396A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
dielectric
flat cable
shielded flat
shield
Prior art date
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/JP2023/002305
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
将栄 米沢
徹 中西
千明 小島
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to CN202380089262.7A priority Critical patent/CN120457502A/zh
Priority to JP2024572736A priority patent/JP7845511B2/ja
Priority to PCT/JP2023/002305 priority patent/WO2024157396A1/ja
Priority to TW113102445A priority patent/TW202431284A/zh
Publication of WO2024157396A1 publication Critical patent/WO2024157396A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/08—Flat or ribbon cables

Definitions

  • This disclosure relates to a shielded flat cable.
  • Patent document 1 discloses a shielded flat cable having a plurality of conductors arranged in parallel with one another, a resin insulation layer covering the conductors, a shielding layer having an adhesive covering the outer surface of the resin insulation layer, and a pair of flame-retardant resin films covering the outer surface of the shielding layer.
  • the shielded flat cable of the present disclosure has a plurality of conductors arranged in parallel with each other, a first dielectric layer covering the plurality of conductors and formed of a first dielectric, and a shielding layer covering the outer surface of the first dielectric layer, the shielding layer being formed by stacking a second dielectric layer formed of a second dielectric, a metal layer, an anchor coat layer, and a base layer in this order, the second dielectric layer containing a flame retardant, the dielectric tangent of the second dielectric being greater than the dielectric tangent of the first dielectric, and the first dielectric layer and the second dielectric layer being bonded together.
  • FIG. 1 is a cross-sectional view showing a shielded flat cable according to a first embodiment.
  • FIG. 2 is a cross-sectional view showing a shielded flat cable according to a second embodiment.
  • FIG. 3 is a cross-sectional view showing a modified example of the shielded flat cable according to the second embodiment.
  • a shielded flat cable has a plurality of conductors arranged in parallel with each other, a first dielectric layer covering the plurality of conductors and formed of a first dielectric, and a shielding layer covering the outer surface of the first dielectric layer, the shielding layer being formed by stacking a second dielectric layer formed of a second dielectric, a metal layer, an anchor coat layer, and a base layer in this order, the second dielectric layer containing a flame retardant, the dielectric tangent of the second dielectric being greater than the dielectric tangent of the first dielectric, and the first dielectric layer and the second dielectric layer being bonded together.
  • the shielded flat cable according to one embodiment of the present disclosure achieves both the transmission characteristics and flame retardancy of the shielded flat cable.
  • the metal layer exposed at the end of the shielding layer in the width direction of the shielded flat cable is covered along the direction in which the multiple conductors extend, and an insulator layer formed of an insulator is provided.
  • the insulator layer By providing the insulator layer, the dielectric strength can be improved.
  • the exposed metal layer is covered with an insulating film.
  • the dielectric strength can be improved.
  • the exposed metal layer is covered with a single resin layer that seamlessly surrounds the shield layer.
  • the dielectric strength can be improved.
  • the dielectric tangent of the first dielectric is 0.001 or less.
  • the thickness of the first dielectric layer is 120 ⁇ m or more. By making the thickness of the first dielectric layer 120 ⁇ m or more, the transmission characteristics of the signal propagating through the conductor can be improved.
  • the thickness of the second dielectric layer is 100 ⁇ m or less. By making the thickness of the second dielectric layer 100 ⁇ m or less, the effect of the second dielectric layer on the transmission characteristics of the signal propagating through the conductor can be reduced.
  • a shielded flat cable has a plurality of conductors arranged in parallel with each other, a first dielectric layer covering the plurality of conductors and formed of a first dielectric, and a shielding layer covering the outer surface of the first dielectric layer, the shielding layer being formed by laminating a second dielectric layer formed of a second dielectric and a metal layer, the second dielectric layer containing a flame retardant, the dielectric tangent of the second dielectric being greater than the dielectric tangent of the first dielectric, the first dielectric layer and the second dielectric layer being bonded together, and the shielding layer being surrounded by a protective layer made of resin.
  • the shielded flat cable according to one embodiment of the present disclosure achieves both the transmission characteristics and flame retardancy of the shielded flat cable.
  • Fig. 1 is a cross-sectional view showing a shielded flat cable 100, which is an example of the shielded flat cable according to the first embodiment.
  • Fig. 1 shows a cross section perpendicular to the longitudinal direction of the shielded flat cable 100.
  • the shielded flat cable 100 is a cable used to electrically connect devices or for wiring within devices.
  • the shielded flat cable 100 has multiple conductors 10, a dielectric layer 20, a shielding layer 30, and an insulating layer 40.
  • the shielded flat cable 100 has multiple conductors 10 arranged along a surface 101 parallel to the XY plane.
  • the multiple conductors 10 are arranged in parallel to one another along the surface 101.
  • the shielded flat cable 100 may include two or more conductors 10.
  • the multiple conductors 10 are arranged in a planar shape.
  • the multiple conductors 10 extend, for example, in the X-axis direction and are arranged in parallel in the Y-axis direction.
  • the X-axis direction is the longitudinal direction of the shielded flat cable 100
  • the Y-axis direction is the width direction of the shielded flat cable 100.
  • the conductor 10 is, for example, a round conductor.
  • the conductor 10 is formed from a metal wire, for example, a copper wire, a tin-plated soft copper wire, or a silver-plated copper wire.
  • the conductor 10 is formed in a circular shape in the YZ cross section. Note that the conductor 10 is not limited to a round conductor, and may be a rectangular conductor or an irregular shaped conductor.
  • the shielded flat cable 100 has a dielectric layer 20 that sandwiches the surface 101 and covers the multiple conductors 10.
  • the dielectric layer 20 has a dielectric layer 21 on the -Z side of the surface 101 and a dielectric layer 22 on the +Z side of the surface 101.
  • the dielectric layer 20 is a layer that ensures the dielectric strength or high frequency characteristics of the shielded flat cable 100.
  • the dielectric layer 20 is formed of a dielectric.
  • the dielectric forming the dielectric layer 20 is formed of, for example, polyolefin.
  • the dielectric tangent of the dielectric layer 20 is 0.001 or less.
  • the thickness of the dielectric layer 20 is, for example, 200 ⁇ m. In other words, the thickness of each of the dielectric layers 21 and 22 constituting the dielectric layer 20 is 100 ⁇ m.
  • the dielectric layer 20 may be formed of a single dielectric layer, or may be formed of multiple dielectric layers, for example, five dielectric layers.
  • the dielectric layer 20 is an example of a first dielectric layer, and the dielectric that forms the dielectric layer 20 is an example of a first dielectric.
  • the dielectric forming the dielectric layer 20 may be formed from any of the following resins: polyethylene, polypropylene, polyimide, polyethylene terephthalate, polyester, and polyphenylene sulfide.
  • the thickness of the dielectric layer 20 is not limited to 200 ⁇ m, but may be 120 ⁇ m or more.
  • the thickness of the dielectric layer 20 may be appropriately set within the range of 120 ⁇ m to 2000 ⁇ m.
  • the thickness of each of the dielectric layers 21 and 22 constituting the dielectric layer 20 may be appropriately set within the range of 60 ⁇ m to 1000 ⁇ m.
  • the transmission characteristics of the shielded flat cable 100 can be improved by setting the dielectric tangent value (at 60 Hz) of the dielectric to 0.001 or less. In order to further improve the transmission characteristics, it is preferable that the dielectric tangent of the dielectric is 0.0005 or less.
  • the shielded flat cable 100 has a shield layer 30 that covers the outer surface of the dielectric layer 20.
  • the shield layer 30 includes a shield layer 30a that covers the outer surface 20A on the +Z side of the dielectric layer 20, and a shield layer 30b covering the +Y side outer surface 20B, the -Z side outer surface 20C, and the -Y side outer surface 20D of the dielectric layer 20.
  • Each of the shield layers 30a and 30b is an adhesive-attached shield layer that includes a metal layer as a shield.
  • Each of the shield layers 30a and 30b includes an adhesive layer 31 and a metal layer 32 that serves as a shield.
  • Each of the shield layers 30a and 30b also includes an anchor coat layer 33 and a base layer 34, in that order, on the outside of the metal layer 32.
  • the shield layer 30 has a laminated portion 30F at the +Y end of the shield layer 30a on the outer surface 20A, where the shield layer 30b is laminated and bonded onto the shield layer 30a.
  • the shield layer 30b has an end 30S where the metal layer 32 of the shield layer 30b is exposed.
  • the shield layer 30 also has a laminated portion 30G at the -Y end of the shield layer 30a on the outer surface 20A, where the shield layer 30b is laminated and bonded onto the shield layer 30a.
  • the shield layer 30b has an end 30T where the metal layer 32 of the shield layer 30b is exposed.
  • the end 30S and the end 30T are located on the outer surface 20A of the dielectric layer 20.
  • the shield layer 30 has a central portion 30H where the shield layer 30a is exposed on the upper side.
  • the adhesive layer 31 of the shielding layer 30b is bonded to the base layer 34 of the shielding layer 30a, improving the airtightness of the shielded flat cable 100.
  • the adhesive layer 31 is provided between the dielectric layer 20 and the metal layer 32, and bonds the dielectric layer 20 and the metal layer 32.
  • the dielectric layer 20 and the adhesive layer 31 are bonded together.
  • the adhesive layer 31 is an adhesive containing a flame retardant.
  • the material of the adhesive layer 31 may be, for example, a polyester resin or a polyolefin resin.
  • the adhesive layer 31 contains, as a flame retardant, a bromine-based flame retardant, a nitrogen-based flame retardant, a phosphorus-based flame retardant, or antimony trioxide.
  • the dielectric tangent of the adhesive layer 31 is greater than 0.001.
  • the thickness of the adhesive layer 31 is, for example, several ⁇ m. The thickness of the adhesive layer 31 is thinner than the thicknesses of the dielectric layers 21 and 22 in the dielectric layer 20.
  • the dielectric layer 20 Since the dielectric layer 20 is provided in contact with the conductor 10, the characteristics of the dielectric layer 20 greatly affect the transmission characteristics of signals propagating through the conductor 10. For example, it is conceivable to add a flame retardant to the dielectric that constitutes the dielectric layer 20 in order to improve flame retardancy, but adding a flame retardant to the dielectric that constitutes the dielectric layer 20 will deteriorate the transmission characteristics (insertion loss) of signals propagating through the conductor 10.
  • the shielded flat cable 100 in order to improve flame retardancy while suppressing deterioration of the transmission characteristics of signals propagating through the conductor 10, no flame retardant is added to the dielectric layer, the dielectric tangent value is set to 0.001 or less, and the adhesive layer 31 located on the inside of the metal layer 32 of the shielding layer 30 contains a flame retardant.
  • the shielded flat cable 100 can suppress deterioration of the transmission characteristics of signals propagating through the conductor 10.
  • the insertion loss at 16 GHz can be made 6 dB/m or less.
  • the shielded flat cable 100 has an adhesive layer 31 containing a flame retardant on the inside of the metal layer 32 of the shielding layer 30, thereby improving the flame retardancy of the shielded flat cable 100.
  • the dielectric layer 20 and the adhesive layer 31 are both dielectrics, so the dielectric beneath the metal layer 32 that serves as the shield is made up of multiple layers with different dielectric properties.
  • the dielectric beneath the metal layer 32 that serves as the shield there are two or more layers with different dielectric tangents.
  • the shielded flat cable 100 can maintain its signal transmission characteristics by providing a thick layer with good dielectric properties in the dielectric layer 20.
  • the thickness of the adhesive layer 31, which serves as the dielectric below the metal layer 32 that serves as the shield is 100 ⁇ m or less, the shielded flat cable 100 can suppress the effect on the signal transmission characteristics even if the dielectric properties of the adhesive layer 31 deteriorate slightly.
  • the adhesive layer 31 contains a flame retardant
  • a flame retardant is not required in the base material layer 34 and the base material layer 42. Therefore, a flexible material that does not contain a flame retardant can be applied to each of the base material layer 34 and the base material layer 42, making the shielded flat cable 100 flexible.
  • the shielded flat cable 100 can be made thinner.
  • the shielded flat cable 100 is thin and flexible while also achieving transmission characteristics and flame retardancy. With regard to transmission characteristics, the insertion loss has been improved.
  • the thickness of the adhesive layer 31 may be appropriately set within the range of 1 ⁇ m to 100 ⁇ m.
  • the adhesive layer 31 is an example of a second dielectric layer, and the dielectric that forms the adhesive layer 31 is an example of a second dielectric.
  • the metal layer 32 is a layer that has a shielding function to prevent noise or ensure high-frequency characteristics of the shielded flat cable 100.
  • the metal layer 32 is formed from a metal foil, for example, a copper foil or an aluminum foil.
  • the thickness of the metal layer 32 is, for example, 10 ⁇ m.
  • the anchor coat layer 33 is provided between the metal layer 32 and the base layer 34, and bonds the metal layer 32 and the base layer 34.
  • the material of the anchor coat layer 33 is not limited.
  • a urethane-based anchor coat material in which a polyurethane base is mixed with an isocyanate-based hardener can be used as the material of the anchor coat layer 33.
  • the anchor coat layer 33 is an example of an adhesive.
  • the anchor coat layer 33 contains a bromine-based flame retardant, a nitrogen-based flame retardant, a phosphorus-based flame retardant, or antimony trioxide as a flame retardant.
  • the substrate layer 34 is a layer that mechanically and electrically protects the metal layer 32.
  • the substrate layer 34 is formed, for example, from polyethylene terephthalate.
  • the thickness of the substrate layer 34 is, for example, 5 to 25 ⁇ m.
  • the shielded flat cable 100 has an insulator layer 40 (insulating film) that covers each of the ends 30S and 30T where the metal layer 32 of the shield layer 30b is exposed.
  • the insulator layer 40 covers each of the ends 30S and 30T along the direction in which the multiple conductors 10 extend.
  • the insulator layer 40 is laminated on the laminated portion 30F at the upper portion 40F of the laminated portion 30F in the shield layer 30.
  • the insulator layer 40 is also laminated on the laminated portion 30F at the upper portion 40G of the laminated portion 30G in the shield layer 30.
  • the insulator layer 40 is laminated on the shield layer 30a at the central portion 30H of the shield layer 30.
  • the shielded flat cable 100 can have a high dielectric strength voltage.
  • the structure of the insulator layer 40 will be described.
  • the insulator layer 40 includes an adhesive layer 41 and a base layer 42.
  • the adhesive layer 41 is provided between the shield layer 30 and the base layer 42, and bonds the shield layer 30 and the base layer 42.
  • the adhesive layer 41 is an adhesive containing a flame retardant.
  • the substrate layer 42 is a layer that protects the ends 30S and 30T of the shield layer 30.
  • the substrate layer 42 is formed, for example, from polyethylene terephthalate.
  • the substrate layer 42 may be a single-layer substrate layer or a multi-layer substrate layer.
  • the insulator layer 40 improves the dielectric strength by covering the ends 30S and 30T where the metal layer 32 of the shield layer 30b is exposed. By improving the dielectric strength, it is possible to comply with the dielectric strength (AC 1000V) standard set forth in, for example, the UL (UNDERWRITERS LABORATORIES) standard.
  • the shielded flat cable 100 meets the required specifications without the insulator layer 40, the shielded flat cable 100 does not need to include the insulator layer 40.
  • Fig. 2 is a cross-sectional view showing a shielded flat cable 200, which is an example of the shielded flat cable according to the second embodiment.
  • Fig. 2 shows a cross section perpendicular to the longitudinal direction of the shielded flat cable 200.
  • the shielded flat cable 200 which is an example of the shielded flat cable according to the second embodiment, has a protective layer 50 instead of the insulating layer 40 of the shielded flat cable 100.
  • the protective layer 50 is a layer that covers the entire periphery of the shielding layer 30 to protect the shielding layer 30.
  • the protective layer 50 is made of an insulating material.
  • the protective layer 50 is formed, for example, by wrapping tape, coating, or extrusion molding.
  • the protective layer 50 may be a jacket.
  • the protective layer 50 is, for example, a single resin layer that surrounds the shielding layer 30 without interruption.
  • the protective layer 50 covers the exposed metal layer 32.
  • the shielded flat cable 200 is thin and flexible while also providing excellent transmission characteristics and flame retardancy.
  • the shielded flat cable 200 does not need to include the substrate layer 34 in the shielding layer 30 because the protective layer 50 provides dielectric strength.
  • FIG. 3 is a cross-sectional view showing a shielded flat cable 210, which is an example of a modified example of the shielded flat cable according to the second embodiment.
  • Figure 3 shows a cross section perpendicular to the longitudinal direction of the shielded flat cable 210.
  • the shielded flat cable 210 has a shield layer 130 in place of the shield layer 30 of the shielded flat cable 200.
  • the shield layer 130 has shield layers 130a and 130b in place of the shield layers 30a and 30b of the shield layer 30.
  • Each of the shield layers 130a and 130b has an adhesive layer 31 and a metal layer 32 that serves as a shield.

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  • Insulated Conductors (AREA)
PCT/JP2023/002305 2023-01-25 2023-01-25 シールドフラットケーブル Ceased WO2024157396A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202380089262.7A CN120457502A (zh) 2023-01-25 2023-01-25 屏蔽扁平电缆
JP2024572736A JP7845511B2 (ja) 2023-01-25 2023-01-25 シールドフラットケーブル
PCT/JP2023/002305 WO2024157396A1 (ja) 2023-01-25 2023-01-25 シールドフラットケーブル
TW113102445A TW202431284A (zh) 2023-01-25 2024-01-22 屏蔽扁形纜線

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2023/002305 WO2024157396A1 (ja) 2023-01-25 2023-01-25 シールドフラットケーブル

Publications (1)

Publication Number Publication Date
WO2024157396A1 true WO2024157396A1 (ja) 2024-08-02

Family

ID=91970009

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2023/002305 Ceased WO2024157396A1 (ja) 2023-01-25 2023-01-25 シールドフラットケーブル

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Country Link
JP (1) JP7845511B2 (https=)
CN (1) CN120457502A (https=)
TW (1) TW202431284A (https=)
WO (1) WO2024157396A1 (https=)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0569819U (ja) * 1992-02-25 1993-09-21 日東電工株式会社 テ−プ電線用シ−ルドテ−プ
JP2009032685A (ja) * 2007-06-27 2009-02-12 Sumitomo Electric Ind Ltd 高速差動伝送ケーブル
WO2018159489A1 (ja) * 2017-02-28 2018-09-07 住友電気工業株式会社 シールドフラットケーブル

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022003895A1 (ja) * 2020-07-02 2022-01-06 住友電気工業株式会社 シールドフラットケーブル

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0569819U (ja) * 1992-02-25 1993-09-21 日東電工株式会社 テ−プ電線用シ−ルドテ−プ
JP2009032685A (ja) * 2007-06-27 2009-02-12 Sumitomo Electric Ind Ltd 高速差動伝送ケーブル
WO2018159489A1 (ja) * 2017-02-28 2018-09-07 住友電気工業株式会社 シールドフラットケーブル

Also Published As

Publication number Publication date
TW202431284A (zh) 2024-08-01
JPWO2024157396A1 (https=) 2024-08-02
CN120457502A (zh) 2025-08-08
JP7845511B2 (ja) 2026-04-14

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