JP2013008793A - Shield tape and cable using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shield tape which realizes a cable having excellent durability while having excellent noise characteristics, and to provide a cable using the shield tape.SOLUTION: A shield tape 21 comprises: a belt like film 22 made of a resin; a first metal layer 23 laminated on one surface of the film 22; a second metal layer 24 laminated on the other surface of the film 22; and a third metal layer 25 provided on one side surface of the film 22. The first metal layer 23, the second metal layer 24, and the third metal layer 25 are continuously connected.

Description

  The present invention relates to a shield tape capable of realizing a cable having excellent durability while having excellent noise characteristics, and a cable using the same.

  A cable in which a signal line is covered with a shield through an insulating layer may be used for connection between electronic devices or wiring inside the electronic device. As one of the cables, a cable in which a shield is formed by winding a tape having a metal layer around an insulating layer is known.

  Since this shield shields electromagnetic waves emitted from signal lines and prevents radiation noise of the cable, it preferably has excellent electromagnetic shielding properties (shielding properties). Preferably covers the signal line with no gap.

  However, in general, a tape (shield tape) having a metal layer used to shield a cable has a structure in which a metal layer is provided on a resin film. Even if it is wound on the insulating layer without a gap, a resin film is interposed between the metal layer and the metal layer in the portion where the tape overlaps. Between the metal layers in which the resin film is interposed, electromagnetic gaps that cannot shield electromagnetic waves are formed. When such an electromagnetic gap is generated, noise may be radiated from the gap. In particular, when an electrical signal having a high frequency is transmitted to the signal line, noise tends to be radiated even if the gap is small.

  Therefore, Patent Document 1 below describes a cable in which a metal covers a signal line without a gap. In the shield tape used for the shield of this cable, a resin film and a metal foil having substantially the same width are laminated in a state shifted in the width direction. Therefore, although the resin film and the metal foil are overlapped at the central portion in the width direction of the shield tape, the resin film and the metal foil are not laminated on one side edge at both side edges. The resin film is exposed on both sides at the part, and the metal foil is exposed on both sides at the other side edge part. The shield tape is then spirally wound on the insulating layer covering the central conductor so that the metal foil is on the insulating layer side. At this time, the shield tape is wound by overlapping the metal foil of the shield tape around the insulating layer on the side edge portion where the metal foil is exposed from the resin film.

  As described above, the metal foil is overlapped each time the shield tape wraps around the insulating layer, so that the shield metal covers the signal line without a gap. Therefore, the cable described in Patent Document 1 has excellent noise characteristics. Then it is said.

Japanese Utility Model Publication No. 03-1596

  However, in the shield tape used for the cable of Patent Document 1, the metal foil is not laminated with the resin film at the other side edge portion, so the metal foil is easily damaged at this portion. In particular, when the cable is repeatedly bent, the shield property of the cable may be deteriorated due to breakage of the metal foil.

  Then, an object of this invention is to provide the shield tape which can implement | achieve the cable which has the outstanding durability while having the outstanding noise characteristic, and a cable using the same.

  In order to solve the above problems, a shield tape of the present invention is laminated on a strip-shaped film made of a resin, a first metal layer laminated on one surface of the film, and the other surface of the film. A second metal layer, and a third metal layer provided on one side surface of the film, wherein the first metal layer, the third metal layer, and the second metal layer are continuously connected. It is characterized by being.

  In this shield tape, the metal layer is laminated on the film made of resin and is supported by the film. Therefore, even if the metal layer is thin, it is damaged when external force is applied to the shield tape. Can be suppressed. Therefore, a cable having excellent durability can be realized by winding this shield tape around an insulating core wire whose inner conductor is covered with an insulating layer. Moreover, in this shield tape, the 3rd metal layer has shielded the electromagnetic clearance gap by the resin-made film interposed between a 1st metal layer and a 2nd metal layer. Therefore, by winding the shield tape on the insulating layer covering the inner conductor so that the first metal layer and the second metal layer are in contact with each other, the inner conductor can be a metal layer without a gap through the insulating layer. A cable that is covered and has excellent noise characteristics can be realized.

  In addition, as described above, since the metal layer is supported by the film in this shield tape, the metal layer is damaged when the cable is manufactured by winding the shield tape on the insulating layer covering the inner conductor. This can be prevented, and the cable can be easily manufactured.

  Furthermore, the width of the second metal layer is smaller than the width of the first metal layer, and at least the region of the other surface of the film opposite to the side where the third metal layer is provided is the second metal layer. It is preferable to expose from the metal layer.

  A portion where the first metal layer and the second metal layer overlap with each other through the film because the width of the second metal layer is smaller than the width of the first metal layer, that is, a portion where the metal layers are laminated on both surfaces of the film. Then, a portion where the first metal layer does not overlap with the second metal layer, that is, a portion where the metal layer is laminated only on one surface of the film is generated. Therefore, when this shield tape is wound around the insulation core as described above, the part where the metal layer is laminated on both sides of the film overlaps the part where the metal layer is laminated only on one side of the film. By winding, it is possible to prevent the metal layers from overlapping four times. Therefore, it is possible to realize a cable having a reduced diameter as compared with the case where metal layers are laminated on both surfaces of the film.

  Furthermore, it is preferable that the first metal layer is laminated on the entire surface of the one surface of the film. Since the film is not exposed from the first metal layer, the shield tape can be easily wound so that the first metal layer and the second metal layer are in contact with each other, and a cable having excellent noise characteristics can be easily manufactured. be able to.

  The cable of the present invention includes at least one insulating wire core having an inner conductor, an insulating layer covering the outer peripheral surface of the inner conductor, and a shield layer covering the outer peripheral surface of the insulating wire core. The shield layer includes a strip-shaped film made of resin, a first metal layer laminated on one surface of the film, a second metal layer laminated on the other surface of the film, and the film And a third metal layer provided on one side surface of the first metal layer, the first metal layer, the third metal layer, and the second metal layer is continuously connected to the shield tape, The shield tape is wrapped around the insulating wire core so that the first metal layer and the second metal layer are in contact with each other.

  The third metal layer shields an electromagnetic gap formed by the resin film interposed between the first metal layer and the second metal layer, and the first metal layer and the second metal layer are in contact with each other. Since it is wound on the insulating layer that covers the inner conductor, the inner conductor is covered with a metal layer without a gap. Therefore, this cable can have excellent noise characteristics. Further, since each metal layer is provided on a resin film, the metal layer is not easily damaged even when the cable is bent. Therefore, this cable can have excellent durability.

  The width of the second metal layer is smaller than the width of the first metal layer, and at least the region of the other surface of the film opposite to the side on which the third metal layer is provided is the second metal layer. The portion where the first metal layer and the second metal layer overlap each other via the film overlaps only the portion where the first metal layer and the second metal layer do not overlap each other. It is preferable to be wound as follows.

  In this cable, the metal layers can be prevented from overlapping four times. Therefore, the diameter can be reduced as compared with the case where metal layers are laminated on both surfaces of the film.

  Furthermore, it is preferable that the first metal layer is laminated on the entire surface of the one surface of the film. Since the film is not exposed from the first metal layer, the shield tape can be easily wound around the insulating core wire so that the first metal layer and the second metal layer are in contact with each other, and the cable can be easily manufactured. it can.

  Further, the shield tape may be wound in a spiral shape. In this case, even if the cable is bent, it is difficult for a gap to be formed in a portion where the shield tape is overlapped, and noise characteristics are deteriorated even if the cable is bent. This can be prevented.

  Alternatively, the shield tape may be wound vertically, and in this case, the shield tape can be easily wound around the insulation core.

  As described above, according to the present invention, a shield tape capable of realizing a cable having excellent noise characteristics and excellent durability, and a cable using the same are provided.

It is a figure which shows the cable which concerns on 1st Embodiment of this invention. It is a figure which shows the structure in a cross section perpendicular | vertical to the longitudinal direction of a shield tape. It is a figure which shows the structure of the cable which represented the shield layer of FIG. 1 in the cross section. It is a figure which shows the cable which concerns on 2nd Embodiment of this invention. It is a figure which shows the structure of the cross section in the VV line of the cable shown in FIG. It is a figure which shows the cable which concerns on 3rd Embodiment of this invention. It is a figure which shows the cable which concerns on 4th Embodiment of this invention in the same state as FIG. It is a figure which shows the noise level according to the frequency of the cable of Example 1, and the cable of Comparative Example 1.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of a cable according to the present invention and a method for manufacturing the same will be described in detail with reference to the drawings.

(First embodiment)
FIG. 1 is a diagram illustrating a cable according to a first embodiment of the present invention.

  As shown in FIG. 1, the cable in this embodiment is a coaxial cable. The coaxial cable 1 includes an inner conductor 11 as a central conductor, an insulating wire core 10 formed of an insulating layer 12 covering the outer peripheral surface of the inner conductor 11, a shield layer 20 covering the outer peripheral surface of the insulating wire core 10, And a jacket 30 that covers the outer peripheral surface of the shield layer 20.

  The inner conductor 11 is composed of a plurality of conductive wire strands. The material of the inner conductor 11 is not particularly limited as long as it is a conductor, and examples thereof include copper and aluminum. In FIG. 1, as described above, the state in which the inner conductor 11 is composed of a plurality of conductive wire strands is shown, but the inner conductor 11 may be composed of a single wire of conductive wire. .

  The insulating layer 12 has a cross-sectional outer shape formed in a substantially circular shape by extrusion molding or the like, and covers the inner conductor 11. The material of the insulating layer 12 is not particularly limited as long as it is an insulating resin, and examples thereof include polyolefin resins. Examples of polyolefin resins include ethylene-propylene copolymer resins, polypropylene, polyethylene, or these resins. Examples of the material for the insulating layer 12 include polytetrafluoroethylene, a fluororesin such as a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, a tetrafluoroethylene-ethylene copolymer, and the like. It is done.

  The insulating wire core 10 is configured as described above by the inner conductor 11 and the insulating layer 12 covering the outer peripheral surface of the inner conductor 11.

  The shield layer 20 that covers the outer peripheral surface of the insulated wire core 10 is composed of a shield tape 21. FIG. 2 is a diagram showing a structure in a cross section perpendicular to the longitudinal direction of the shield tape.

  As shown in FIG. 2, the shield tape 21 includes a strip-shaped film 22 made of a resin, a first metal layer 23 laminated along the longitudinal direction of the film 22 on one surface of the film 22, and the film 22 A second metal layer 24 laminated along the longitudinal direction of the film 22 on the other surface, and a third metal layer 25 provided along the longitudinal direction of the film 22 on one side surface of the film 22 are provided. Yes.

  The first metal layer 23 and the second metal layer 24 are connected to the third metal layer 25, respectively. Accordingly, the first metal layer 23 and the second metal layer 24 are electrically connected to each other via the third metal layer 25. The width of the second metal layer 23 is smaller than the width of the first metal layer 24. The first metal layer 23 is laminated on the entire surface of the film 22, whereas the second metal layer 24 is formed of the film. 22 is provided only on the side where the third metal layer 25 is provided. Therefore, on the side of the film 22 where the third metal layer 25 is provided, the first metal layer 23 and the second metal layer 24 overlap each other via the film 22, and the third metal layer 25 of the film 22. The first metal layer 23 does not overlap the second metal layer 24 on the side opposite to the side on which is provided. That is, in the shield tape 21, a portion where the metal layer is laminated on both surfaces of the film and a portion where the metal layer is laminated only on one surface of the film are generated, and on the other surface of the film 22. A region opposite to the side where the third metal layer 25 is provided is exposed from the second metal layer 24. Note that an adhesive (not shown) is applied to the other surface of the exposed film 22.

  Although it does not restrict | limit especially as a material which comprises the film 22, For example, resin, such as a polyethylene terephthalate, a polyethylene naphthalate, a polyimide, a polyvinyl chloride, a polypropylene, can be mentioned, Especially, a polyethylene terephthalate is preferable.

  The first metal layer 23, the second metal layer 24, and the third metal layer 25 are formed by sticking a metal foil on the surface of the film 22 or by depositing a metal on the surface of the film 22. It is provided above. Although it does not specifically limit as a metal which comprises such a metal layer, For example, the metal which can be used for the internal conductor 11 can be mentioned.

  FIG. 3 is a diagram illustrating a cable structure in which the shield layer of FIG. 1 is represented in cross section. For easy understanding, the jacket 30 is omitted in FIG.

  As shown in FIG. 3, the shield tape 21 described with reference to FIG. 2 has the first metal layer 23 facing outward, the second metal layer 24 facing inward (insulating core 10 side), and the second The metal layer 24 is spirally wound on the outer peripheral surface of the insulated wire core 10 so as to be in contact with the first metal layer 23. That is, the shield tape 21 is wound such that the second metal layer 24 of the shield tape 21 that circulates around the insulated wire core 10 overlaps the first metal layer 23 of the shield tape 21 that has already been wound. Thus, the second metal layer 24 and the first metal layer 23 are in contact with each other, and the first metal layer 23 and the second metal layer 24 are directly conducted.

  As described above, the first metal layer 23 and the second metal layer 24 are wound so as to be in contact with each other, so that the outer peripheral surface of the insulating core 10 is covered with the metal layer without any gap.

  In the present embodiment, the shield tape 21 has a portion where the first metal layer 23 and the second metal layer 24 overlap each other with the film 22 interposed between the first metal layer 23 and the second metal layer 24. It is wound so that it overlaps only in the part which does not overlap. That is, the portion where the metal layer is laminated on both surfaces of the film 22 is wound so as to overlap the portion where the metal layer is laminated only on one surface of the film 22. By winding the shield tape 21 in this way, the metal layer is suppressed to a triple overlap at the maximum, and the metal layer is prevented from overlapping four times. For example, in a cable in which a shield tape in which metal layers are provided on both surfaces of the film 22 is wound on the outer peripheral surface of the insulated wire core 10, a portion where the metal layers are overlapped is generated. As described above, the cable can be reduced in diameter because the overlapping of the metal layers can be suppressed to triple.

  Further, the shield tape 21 is coated with an adhesive (not shown) on the exposed portion of the film 22 because the first metal layer 23 and the second metal layer 24 do not overlap as described above. Thus, the film 22 is adhered on the outer peripheral surface of the insulating core 10, and the shield tape 21 is firmly fixed on the outer peripheral surface of the insulating core 10.

  Thus, the shield layer 21 is formed as described above by winding the shield tape 21 on the outer peripheral surface of the insulated wire core 10.

  The jacket 30 is made of a thermoplastic resin, and is provided by extrusion so as to cover the outer peripheral surface of the shield layer 20. Examples of such thermoplastic resins include polytetrafluoroethylene, fluoropolymers such as tetrafluoroethylene-perfluoroalkyl vinyl ether copolymers, tetrafluoroethylene-ethylene copolymers, and vinyl chloride. Can do.

  As described above, the coaxial cable 1 around which the shield tape 21 of the present embodiment is wound has an electromagnetic gap due to the resin film 22 interposed between the first metal layer 23 and the second metal layer 24. Since the third metal layer 25 is shielded, and the first metal layer 23 and the second metal layer 24 are wound on the insulating layer 12 covering the inner conductor 11 so as to be in contact with each other, The conductor 11 is covered with a metal layer without a gap. Therefore, the coaxial cable 1 can have excellent noise characteristics. Each metal layer is laminated on a resin film 22 and supported by the film 22. For this reason, even when the coaxial cable 1 is bent, the metal layer is not easily damaged. Therefore, the coaxial cable 1 can have excellent durability.

  Thus, the shield tape 21 can realize a cable having excellent durability while having excellent noise characteristics.

  Further, since the shield tape 21 is spirally wound around the insulated wire core, even if the coaxial cable 1 is bent, it is difficult to generate a gap in the portion where the shield tape 21 overlaps. Can be prevented from decreasing.

(Second Embodiment)
Next, a second embodiment of the present invention will be described in detail with reference to FIGS. In addition, about the component which is the same as that of 1st Embodiment, or equivalent, except the case where it demonstrates especially, the same referential mark is attached | subjected and the overlapping description is abbreviate | omitted. FIG. 4 is a diagram showing a cable according to the second embodiment of the present invention, and FIG. 5 is a diagram showing a cross-sectional structure taken along line VV of the cable shown in FIG.

  As shown in FIGS. 4 and 5, the cable of this embodiment is also a coaxial cable. The coaxial cable 2 is different from the coaxial cable 1 of the first embodiment in the structure of the shield layer 20. The shield layer 20 of the coaxial cable 2 has a shield tape 21 similar to that of the first embodiment shown in FIG. Also in this embodiment, the shield tape 21 faces the outside of the first metal layer 23, the second metal layer 24 faces the inside, and the second metal layer 24 overlaps the first metal layer 23. It is rolled up. The second metal layer 24 and the first metal layer 23 are in contact with each other, and the first metal layer 23 and the second metal layer 24 are directly conducted.

  In the present embodiment, as in the coaxial cable 1 of the first embodiment, the portion where the first metal layer 23 and the second metal layer 24 overlap with each other via the film 22 is the first metal layer. The shield tape 21 is wound around the insulating wire core 10 so that only the portion where the second metal layer 24 and the second metal layer 24 do not overlap, and the overlapping of the metal layers is suppressed to triple at the maximum.

  According to the coaxial cable 2 according to the present embodiment, the shield tape 21 can be easily wound around the insulated wire core 10.

(Third embodiment)
Next, a third embodiment of the present invention will be described in detail with reference to FIG. In addition, about the component which is the same as that of 1st Embodiment, or equivalent, except the case where it demonstrates especially, the same referential mark is attached | subjected and the overlapping description is abbreviate | omitted. FIG. 6 is a view showing a cable according to the third embodiment of the present invention.

  As shown in FIG. 6, the cable according to the present embodiment is different from the first embodiment in that the outer peripheral surface of the plurality of insulated wire cores 10 is a composite cable covered with a shield layer 20. Note that the composite cable 3 of the present embodiment is a twinax wire having two insulating wire cores 10 as shown in FIG.

  The shield layer 20 is composed of a shield tape similar to the shield tape 21 in the first embodiment described with reference to FIG. 2, and the shield tape 21 is wound around the entire outer peripheral surface of the plurality of insulated wire cores 10. Except for the coaxial cable 1 of the first embodiment, it is wound.

  The outer peripheral surface of the shield layer 20 that covers the outer peripheral surfaces of the plurality of insulated wire cores 10 is covered with a jacket 30.

  According to the composite cable 3 of the present embodiment, even when noise is radiated from each of the inner conductors 11 of the plurality of insulated wire cores, the metal layer of the shield tape 21 covers the inner conductor without any gaps. Can be shielded.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described in detail with reference to FIG. In addition, about the component which is the same as that of 1st Embodiment, or equivalent, except the case where it demonstrates especially, the same referential mark is attached | subjected and the overlapping description is abbreviate | omitted. FIG. 7 is a view showing a cable according to the fourth embodiment of the present invention in the same state as FIG.

  As shown in FIG. 7, the cable according to the present embodiment has a single insulated wire core 10 and is a coaxial cable.

  In the coaxial cable 4, a shield tape similar to the shield tape 21 of the first embodiment described with reference to FIG. 2 is wound on the outer peripheral surface of the insulating core 10. The coaxial cable 4 is different from the coaxial cable 1 of the first embodiment in that the shield tape 21 is wound with the second metal layer 24 facing outward and the first metal layer 23 facing inward. In other words, the shield layer 20 in the present embodiment is wound on the outer peripheral surface of the insulating core 10 with the shield tape 21 in the first embodiment turned upside down. In the present embodiment, a part of the first metal layer 23 is wound so as to overlap the second metal layer 24, and the second metal layer 24 and the first metal are wound in the same manner as in the first embodiment. The layer 23 is in contact with each other, and the second metal layer 24 and the first metal layer 23 are in direct conduction. Thus, the shield layer 20 is formed by the shield tape 21.

  In the present embodiment, in order to avoid unnecessary adhesion, it is preferable that the adhesive is not applied to the portion where the film 22 is exposed from the second metal layer 24, and on the outer peripheral surface of the insulating core 10. It is preferable that an adhesive (not shown) is applied from the viewpoint of appropriately fixing the shield tape 21 on the insulating core 10.

  Also with the coaxial cable 4 according to the present embodiment, since the metal layer covers the insulating core 10 without a gap, excellent noise characteristics can be obtained.

  As mentioned above, although this invention was demonstrated to the 1st-4th embodiment as an example, this invention is not limited to these.

  For example, in the above embodiment, in the shield tape 21, the second metal layer 24 may be laminated on the entire other surface of the film 22. That is, a metal layer may be laminated on both surfaces of the film 22. In this case, a metal layer may be further provided on the side surface opposite to the side surface on which the third metal layer 25 is provided.

  In the third embodiment, the number of the insulation cores 10 may be three or more, and the shield tape 21 may be wound vertically as in the second embodiment.

  In the second and third embodiments, as in the fourth embodiment, the shield tape 21 is wound so that the second metal layer 24 faces the outside and the first metal layer 23 faces the inside. May be.

  Hereinafter, the content of the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

Example 1
The outer peripheral surface of the inner conductor of the annealed copper wire having a diameter of 0.4 mm was covered with an insulating layer made of polyethylene so that the outer diameter was 1.5 mm, thereby forming an insulating core. Also, an aluminum foil having a width of 8 mm and a thickness of 18 μm is pasted on one surface of a polyethylene terephthalate film having a width of 6 mm and a thickness of 10 μm, and the aluminum foil is pasted on one surface of the film Was the first metal layer. And the part which protruded from the film in this aluminum foil is folded and stuck on the other surface of the film, and the aluminum foil stuck on the other surface is used as the second metal layer, and the aluminum located on the side surface of the film The foil was the third metal layer. Thus, the first metal layer is laminated on the entire surface of one surface, the second metal layer is laminated by 2 mm from the side edge of the other surface, and the first metal layer and the second metal layer are connected to the third metal layer. Prepared shield tape.

  Next, the shield tape was spirally wound on the outer peripheral surface of the insulating core at a pitch of 6 mm with the first metal layer facing outward and the second metal layer facing the insulating core.

(Comparative Example 1)
An insulation core similar to that of Example 1 was prepared. Also, a shield tape similar to the shield tape of Example 1 was prepared except that an aluminum foil was attached to only one surface of a film having a width of 6 mm to form a metal layer.

  And it wound on the insulated wire core similarly to Example 1.

  Next, the metal layer of Example 1 and Comparative Example 1 was grounded, and a signal having a frequency of 1 MHz to 10 GHz was applied to each of the internal conductors of Example 1 and Comparative Example 1. And the noise in the place 1 mm away from each cable was measured. The result is shown in FIG.

  FIG. 8 is a diagram illustrating a noise level according to the frequency of the cable of the first embodiment and the cable of the first comparative example. As shown in FIG. 8, the cable of Example 1 was able to reduce noise by up to 25 dB compared to the cable of Comparative Example 1, and the noise could be reduced by about 10 dB on average.

  From this result, it was found that the cable according to the present invention is excellent in noise characteristics.

  As described above, according to the present invention, a shield tape capable of realizing a cable having excellent durability while having excellent noise characteristics, and a cable using the same are provided.

1, 2, 4, ... Coaxial cable (cable)
3 ... Composite cable (cable)
DESCRIPTION OF SYMBOLS 10 ... Insulated wire core 11 ... Inner conductor 12 ... Insulating layer 20 ... Shield layer 21 ... Shield tape 22 ... Film 23 ... 1st metal layer 24 ... 2nd Metal layer 25 ... Third metal layer 30 ... Jacket

Claims (8)

A belt-shaped film made of resin;
A first metal layer laminated on one side of the film;
A second metal layer laminated on the other surface of the film;
A third metal layer provided on one side of the film;
With
The shield tape, wherein the first metal layer, the third metal layer, and the second metal layer are continuously connected. The width of the second metal layer is smaller than the width of the first metal layer,
2. The shield tape according to claim 1, wherein at least a region of the other surface of the film opposite to the side on which the third metal layer is provided is exposed from the second metal layer.   The shield tape according to claim 2, wherein the first metal layer is laminated on the entire surface of the one surface of the film. At least one insulating wire core having an inner conductor and an insulating layer covering an outer peripheral surface of the inner conductor;
A shield layer covering the outer peripheral surface of the insulated wire core;
With
The shield layer includes a strip-shaped film made of a resin, a first metal layer laminated on one surface of the film, a second metal layer laminated on the other surface of the film, A third metal layer provided on one side surface, and the first metal layer, the third metal layer, and the second metal layer are continuously connected to the shield tape,
The cable is characterized in that the shield tape is wrapped around the insulating wire core so that the first metal layer and the second metal layer are in contact with each other. The width of the second metal layer is smaller than the width of the first metal layer, and at least the region of the other surface of the film opposite to the side on which the third metal layer is provided is the second metal layer. Exposed from
The portion where the first metal layer and the second metal layer overlap with each other via the film is wound so as to overlap only the portion where the first metal layer and the second metal layer do not overlap each other. The cable according to claim 4.   The cable according to claim 5, wherein the first metal layer is laminated on the entire surface of the one surface of the film.   The cable according to any one of claims 4 to 6, wherein the shield tape is wound spirally.   The cable according to claim 4, wherein the shield tape is wound vertically.

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