Wiring and display devices

Abstract

The present invention provides a wiring system and a display device that can suppress current concentration at the intersections of conductive wires while simultaneously suppressing increased visibility of the conductor layer. [Solution] The corners CN1, CN2, CN3, and CN4 of the intersection 53 have an extended portion 54 that extends outward. Therefore, the extended portion 54 smooths the flow of current, thereby suppressing current concentration. In the wiring body 200, at the largest area extended portion 54, the larger of the dimensions a1 of the imaginary line segment connecting the first intersection STP and the reference point SP, and the larger of the dimensions a2 of the imaginary line segment connecting the second intersection GLP and the reference point SP, is smaller than the smaller of the average width b1 of the first conductive wire 51 and the average width b2 of the second conductive wire 52. This makes it possible to keep the size of each extended portion 54 at the intersection 53 small. Consequently, the visibility of the conductor layer 5 at the intersection 53 can be suppressed.

Description

[Technical Field]

[0001] This disclosure relates to wiring and display devices. [Background technology]

[0002] Conventionally, wiring bodies comprising a base material and a mesh-like conductive layer provided on the base material are known (for example, Patent Document 1). On the base material, a mesh-like pattern is formed by multiple conductive wires intersecting each other. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-162225 [Overview of the project] [Problems that the invention aims to solve]

[0004] Here, at the intersection where conductive wires cross, a problem arises in which current tends to concentrate at the corner between the edge of one conductive wire and the edge of the other conductive wire. On the other hand, if a large expansion is formed at the intersection that extends the conductive portion outward, a problem arises in which the visibility of the conductive layer near the intersection increases.

[0005] Therefore, the present disclosure aims to provide a wiring system and a display device that can suppress current concentration at the intersections of conductive wires while suppressing increased visibility of the conductor layer. [Means for solving the problem]

[0006] A wiring assembly relating to one aspect of the present disclosure comprises a base material and a conductor layer formed by arranging a plurality of first conductive wires and a plurality of second conductive wires in a mesh-like manner on the base material, wherein the first conductive wires have first edges on both sides in the width direction, the second conductive wires have second edges on both sides in the width direction, and the conductor layer has intersections where the first conductive wires and the second conductive wires intersect each other, and in a plan view, a virtual first reference line which is a straight line parallel to the extending direction of the first conductive wires approximating the first edges, and a virtual second reference line which is a straight line parallel to the extending direction of the second conductive wires approximating the second edges, and the first When a hypothetical reference point is set where the reference line and the second reference line intersect, the corner of the intersection has an extended portion that extends outward beyond the first and second reference lines. When the first intersection point of the edge of the extended portion is set on the first reference line and the second intersection point of the edge of the extended portion is set on the second reference line, in the extended portion with the largest area in plan view at one intersection, the larger of the dimensions of the first hypothetical line segment connecting the first intersection point and the reference point, and the second hypothetical line segment connecting the second intersection point and the reference point, is smaller than the smaller of the average width of the first conductive wire and the average width of the second conductive wire.

[0007] A display device relating to one aspect of this disclosure comprises the wiring described above. [Effects of the Invention]

[0008] According to one aspect of this disclosure, it is possible to provide a wiring body and a display device that can suppress current concentration at the intersections of conductive wires while suppressing increased visibility of the conductor layer. [Brief explanation of the drawing]

[0009] [Figure 1] This is a plan view showing one embodiment of a conductive film equipped with wiring. [Figure 2] This is a cross-sectional view along the line II-II in Figure 1. [Figure 3] This is a cross-sectional view showing a conductive film relating to a modified example. [Figure 4] This is a cross-sectional view showing one embodiment of a display device. [Figure 5] This is a plan view of an antenna equipped with wiring. [Figure 6] It is an enlarged cross-sectional view of a wiring body. [Figure 7] It is an enlarged plan view of a conductor layer. [Figure 8] It is an enlarged view of an extension part at a corner. [Figure 9] It is a diagram for explaining a reference line with respect to an edge of a conductive wire and the surface roughness of a side surface of the conductive wire. [Figure 10] It is a conceptual diagram for explaining the area of an intersection. [Figure 11] It is a diagram for explaining the surface roughness of an upper surface of a conductive wire. [Figure 12] It is an enlarged plan view of an intersection at a location where the angle is an acute angle. [Figure 13] It is a graph showing the relationship between an angle and a length ratio. [Figure 14] It is an enlarged plan view showing an intersection of a wiring body according to a comparative example.

Modes for Carrying Out the Invention

[0010] Hereinafter, some embodiments of the present disclosure will be described in detail. However, the present disclosure is not limited to the following embodiments.

[0011] FIG. 1 is a plan view showing a conductive film including a wiring body 200 according to an embodiment of the present disclosure, and FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1. The conductive film 20 has an antenna 300, and the antenna 300 includes a wiring body 200. The conductive film 20 shown in FIGS. 1 and 2 includes a film-like light-transmissive base material 1 (base material), a conductor layer 5 provided on one main surface 1S of the light-transmissive base material 1, and a resin layer 7 provided on one main surface 1S of the light-transmissive base material 1. The conductor layer 5 has a conductor portion 3 including a portion having a pattern extending in a direction along the main surface 1S of the light-transmissive base material 1 and including a plurality of openings 3a. The resin layer 7 has an insulating resin portion 7A filling the openings 3a of the conductor portion 3 and a light-transmissive resin layer 7B provided on the outer peripheral side of the conductor portion 3. In FIG. 2, the conductor layer 5 is shown in a deformed state, and the width of the conductor portion 3 is shown in an emphasized state. Also, the thickness of each layer is shown in a deformed state. Details of the thickness of each layer will be described later. In the example shown in FIG. 1, the conductor layer 5 is formed near one short side of the conductive film 20, but the position where the conductor layer 5 is formed is not particularly limited, and the conductor layer 5 may be formed near the long side.

[0012] The light-transmissive base material 1 has a light transmittance required when the conductive film 20 is incorporated into a display device. Specifically, the total light transmittance of the light-transmissive base material 1 may be 90 to 100%. The haze of the light-transmissive base material 1 may be 0 to 5%.

[0013] The light-transmissive base material 1 may be, for example, a transparent resin film, and examples thereof include films of polyethylene terephthalate (PET), polycarbonate (PC), polyethylene naphthalate (PEN), cycloolefin polymer (COP), or polyimide (PI). Alternatively, the light-transmissive base material 1 may be a glass substrate.

[0014] For example, as shown in Figure 3, the light-transmitting substrate 1 may be a laminate having a light-transmitting support film 11 and an intermediate resin layer 12 and a base layer 13 provided sequentially on the support film 11. The support film 11 can be the transparent resin film described above. The base layer 13 is a layer provided to form the conductive part 3 by electroless plating or the like. If the conductive part 3 is formed by other methods, the base layer 13 does not necessarily have to be provided. The intermediate resin layer 12 does not necessarily have to be provided between the support film 11 and the base layer 13.

[0015] The thickness of the light-transmitting substrate 1 or the support film 11 constituting it may be 10 μm or more, 20 μm or more, or 35 μm or more, and may be 500 μm or less, 200 μm or less, or 100 μm or less.

[0016] The provision of the intermediate resin layer 12 can improve the adhesion between the support film 11 and the base layer 13. If the base layer 13 is not provided, the provision of the intermediate resin layer 12 between the support film 11 and the light-transmitting resin layer 7B can improve the adhesion between the support film 11 and the light-transmitting resin layer 7B.

[0017] The intermediate resin layer 12 may be a layer containing resin and inorganic filler. An example of the resin constituting the intermediate resin layer 12 is acrylic resin. An example of the inorganic filler is silica.

[0018] The thickness of the intermediate resin layer 12 may be, for example, 5 nm or more, 100 nm or more, or 200 nm or more, and may be 10 μm or less, 5 μm or less, or 2 μm or less.

[0019] The base layer 13 may be a layer containing a catalyst and a resin. The resin may be a cured product of a curable resin composition. Examples of curable resins included in the curable resin composition include acrylic resins, amino resins, cyanate resins, isocyanate resins, polyimide resins, epoxy resins, oxetane resins, polyesters, allyl resins, phenolic resins, benzoxazine resins, xylene resins, ketone resins, furan resins, COPNA resins, silicon resins, diclopentadiene resins, benzocyclobutene resins, episulfide resins, ene-thiol resins, polyazomethine resins, polyvinyl benzyl ether compounds, acenaphthylene, and UV-curable resins containing functional groups that undergo polymerization reactions under ultraviolet light, such as unsaturated double bonds, cyclic ethers, and vinyl ethers.

[0020] The catalyst contained in the underlayer 13 may be an electroless plating catalyst. The electroless plating catalyst may be a metal selected from Pd, Cu, Ni, Co, Au, Ag, Pd, Rh, Pt, In, and Sn, and may be Pd. The catalyst may be one type alone or a combination of two or more types. Typically, the catalyst is dispersed in the resin as catalyst particles.

[0021] The catalyst content in the base layer 13 may be 0.1% by mass or more, 0.3% by mass or more, or 0.5% by mass or more, based on the total amount of the base layer 13, and may also be 20% by mass or less, 10% by mass or less, or 5% by mass or less.

[0022] The thickness of the base layer 13 may be 10 nm or more, 20 nm or more, or 30 nm or more, and may be 500 nm or less, 300 nm or less, or 150 nm or less.

[0023] The light-transmitting substrate 1 may further have a protective layer provided on the main surface of the support film 11 opposite to the light-transmitting resin layer 7B and the conductor portion 3. The provision of the protective layer suppresses damage to the support film 11. The protective layer can be the same layer as the intermediate resin layer 12. The thickness of the protective layer may be 5 nm or more, 50 nm or more, or 500 nm or more, and may be 10 μm or less, 5 μm or less, or 2 μm or less.

[0024] The conductor portion 3 constituting the conductor layer 5 includes a portion having a pattern containing openings 3a. The pattern containing openings 3a is a mesh-like pattern consisting of a plurality of regularly arranged openings 3a formed by a plurality of intersecting linear portions. The conductor portion 3 having a mesh-like pattern can function well as, for example, a radiating conductor and a feed line of an antenna 300. The conductor portion 3 may also have a planar pattern without openings 3a that functions as a terminal and a ground pad portion. Details of the pattern configuration of the conductor portion 3 in the conductor layer 5 will be described later.

[0025] The conductor portion 3 may contain a metal. The conductor portion 3 may contain at least one metal selected from copper, nickel, cobalt, palladium, silver, gold, platinum, and tin, and may contain copper. The conductor portion 3 may be a metal plating formed by a plating method. The conductor portion 3 may further contain nonmetallic elements such as phosphorus, to the extent that appropriate conductivity is maintained.

[0026] The conductive portion 3 may be a laminate composed of multiple layers. Furthermore, the conductive portion 3 may have a blackened layer as the surface layer opposite to the light-transmitting substrate 1. The blackened layer can contribute to improving the visibility of the display device incorporating the conductive film.

[0027] The insulating resin portion 7A is made of a light-transmitting resin and is provided to fill the opening 3a of the conductor portion 3. Typically, a flat surface is formed between the insulating resin portion 7A and the conductor portion 3.

[0028] The light-transmitting resin layer 7B is formed of a resin that is light-transmitting. The total light transmittance of the light-transmitting resin layer 7B may be 90-100%. The haze of the light-transmitting resin layer 7B may be 0-5%.

[0029] The difference between the refractive index of the light-transmitting substrate 1 (or the refractive index of the support film constituting the light-transmitting substrate 1) and the refractive index of the light-transmitting resin layer 7B may be 0.1 or less. This makes it easier to ensure good visibility of the displayed image. The refractive index (nd25) of the light-transmitting resin layer 7B may be, for example, 1.0 or more, 1.7 or less, 1.6 or less, or 1.5 or less. The refractive index can be measured by a reflectance spectrophotometer. From the viewpoint of uniformity of the optical path length, the conductor portion 3, the insulating resin portion 7A, and the light-transmitting resin layer 7B may have substantially the same thickness.

[0030] The resin forming the insulating resin portion 7A and the light-transmitting resin layer 7B may be a cured product of a curable resin composition (photocurable resin composition or thermosetting resin composition). The curable resin composition forming the insulating resin portion 7A and / or the light-transmitting resin layer 7B includes a curable resin, and examples include acrylic resins, amino resins, cyanate resins, isocyanate resins, polyimide resins, epoxy resins, oxetane resins, polyesters, allyl resins, phenolic resins, benzoxazine resins, xylene resins, ketone resins, furan resins, COPNA resins, silicon resins, diclopentadiene resins, benzocyclobutene resins, episulfide resins, ene-thiol resins, polyazomethine resins, polyvinyl benzyl ether compounds, acenaphthylene, and UV-curable resins containing unsaturated double bonds and functional groups that undergo polymerization reactions under ultraviolet light, such as cyclic ethers and vinyl ethers.

[0031] The resin forming the insulating resin portion 7A and the resin forming the light-transmitting resin layer 7B may be the same. Since the insulating resin portion 7A and the light-transmitting resin layer 7B, formed from the same resin, have the same refractive index, the uniformity of the optical path length transmitted through the conductive film 20 can be further improved. When the resin forming the insulating resin portion 7A and the resin forming the light-transmitting resin layer 7B are the same, the insulating resin portion 7A and the light-transmitting resin layer 7B can be easily formed together by, for example, forming a pattern from a single curable resin layer using an imprint method.

[0032] The conductive film 20 can be manufactured by a method including, for example, pattern formation by imprinting. An example of a method for manufacturing the conductive film 20 includes preparing a light-transmitting substrate 1 having a support film and a base layer containing an intermediate resin layer and a catalyst provided on one main surface of the support film, forming a curable resin layer on the main surface 1S on the base layer side of the light-transmitting substrate 1, forming a trench exposing the base layer by imprinting using a mold having protrusions, and forming a conductive portion 3 that fills the trench by electroless plating, which grows metal plating from the base layer. By curing the curable resin layer with the mold pressed into it, an insulating resin portion 7A having a pattern including an opening with an inverted shape of the protrusions of the mold and a light-transmitting resin layer 7B are formed together. The method for forming the insulating resin portion 7A having a pattern including openings is not limited to imprinting, and any method such as photolithography can be applied.

[0033] The conductive film described above can be incorporated into a display device, for example, as a planar transparent antenna. The display device may be, for example, a liquid crystal display device or an organic EL display device. Figure 4 is a cross-sectional view showing one embodiment of a display device incorporating a conductive film. The display device 100 shown in Figure 4 comprises an image display unit 10 having an image display area 10S, a conductive film 20, a polarizing plate 30, and a cover glass 40. The conductive film 20, the polarizing plate 30, and the cover glass 40 are laminated in this order from the image display unit 10 side on the image display area 10S side of the image display unit 10. The configuration of the display device is not limited to the form shown in Figure 4 and can be changed as needed. For example, the polarizing plate 30 may be provided between the image display unit 10 and the conductive film 20. The image display unit 10 may be, for example, a liquid crystal display unit. The polarizing plate 30 and the cover glass 40 can be those commonly used in display devices. The polarizing plate 30 and the cover glass 40 are not necessarily required. Light for image display emitted from the image display area 10S of the image display unit 10 passes through a path with a highly uniform optical path length that includes the conductive film 20. This enables high-quality image display with high uniformity and suppressed moiré.

[0034] Next, with reference to Figure 5, the configuration of the conductor layer 5 and its surroundings will be described in more detail. Figure 5 is a plan view of the antenna 300 equipped with the wiring body 200. Figure 5 shows an enlarged view of a part of the conductor layer 5. In the following description, the XY coordinates will be set with respect to a plane parallel to the main surface 1S. The Y-axis direction is the direction along the main surface 1S, and in the example shown in Figure 1, it corresponds to the direction perpendicular to the edge of the conductive film 20. The central side of the conductive film 20 is considered the positive side in the Y-axis direction, and the outer periphery side of the conductive film 20 is considered the negative side in the Y-axis direction. The X-axis direction is the direction perpendicular to the Y-axis direction along the main surface S1, and in the example shown in Figure 1, it corresponds to the direction in which the edge of the conductive film 20 extends. One side on which the edge of the conductive film 20 extends is considered the positive side in the X-axis direction, and the other side is considered the negative side in the X-axis direction. The direction perpendicular to the X-axis direction and the Y-axis direction is considered the Z-axis direction. The side on which the resin layer 7 is provided with respect to the light-transmitting substrate 1 is considered the positive side in the Z-axis direction.

[0035] As shown in Figure 5, the mesh-like pattern of the conductor layer 5 includes a plurality of first conductive wires 51 and a plurality of second conductive wires 52. The first conductive wires 51 are linear conductive portions 3 extending parallel to the Y-axis direction. The plurality of first conductive wires 51 are arranged to be spaced apart from each other in the X-axis direction. The plurality of first conductive wires 51 are arranged to be spaced apart at equal intervals. The second conductive wires 52 are linear conductive portions 3 extending parallel to the X-axis direction. The plurality of second conductive wires 52 are arranged to be spaced apart from each other in the Y-axis direction. The plurality of second conductive wires 52 are arranged to be spaced apart at equal intervals. The thickness of the conductive wires 51 and 52 is not particularly limited, but may be set to, for example, 1 to 3 μm. The pitch of the conductive wires 51 and 52 is also not particularly limited, but may be set to, for example, 100 to 300 μm. The first conductive wire 51 does not need to be parallel to the Y-axis direction as long as it extends in the Y-axis direction, and the second conductive wire 52 does not need to be parallel to the X-axis direction as long as it extends in the X-axis direction. When explaining conductive wires 51 and 52 without distinguishing between them, they may be referred to as conductive wire 50. Conductive wires 51 and 52 may have a high aspect ratio shape in cross-sectional view (cross-section shown in Figure 6).

[0036] The conductor layer 5 has a radiating element section 5A and a feeding section 5B. The radiating element section 5A is the region that radiates signals as an antenna. The radiating element section 5A has a rectangular shape with two sides parallel to the Y-axis and two sides parallel to the X-axis. The feeding section 5B is the region that supplies power to the radiating element section 5A. The feeding section 5B has a strip shape that extends parallel to the Y-axis. The feeding section 5B is connected to the negative side of the radiating element section 5A in the Y-axis direction. The feeding section 5B is connected to a terminal that is not shown.

[0037] Next, with reference to Figure 5 and Figure 6, the configuration of the resin layer 7 and the conductor layer 5 will be described in more detail. Figure 6 is a cross-sectional view of the wiring body 200. In the following description, the terms "upper" and "lower" will be used, but this does not limit the orientation of the wiring body 200 when in use. The positive side in the Z-axis direction may be referred to as "upper," and the negative side as "lower." As mentioned above, as shown in Figure 6, the resin layer 7 is provided on the light-transmitting substrate 1. The resin layer 7 is provided so as to cover the main surface 1S on the positive side in the Z-axis direction of the light-transmitting substrate 1. The resin layer 7 has an upper surface 7a on the positive side in the Z-axis direction and a lower surface 7b on the negative side. The lower surface 7b on the negative side is provided so as to be in contact with the main surface 1S of the light-transmitting substrate 1.

[0038] A mesh-like trench 60 is formed in the resin layer 7, penetrating the resin layer 7 in the Z-axis direction (thickness direction). The mesh-like trench 60 extends from the upper surface 7a on the positive side in the Z-axis direction of the resin layer 7 to the lower surface 7b on the negative side. The conductive wires 50 of the conductor layer 5 are arranged within the mesh-like trench 60. As shown in Figure 5, the mesh-like trench 60 has a first trench 61 in which the first conductive wire 51 is arranged, and a second trench 62 in which the second conductive wire 52 is arranged. The first trench 61 is arranged with a pitch and width corresponding to the first conductive wire 51. The second trench 62 is arranged with a pitch and width corresponding to the second conductive wire 52. That is, the first trench 61 is a linear trench extending parallel to the Y-axis direction. Multiple first trenches 61 are arranged to be spaced apart from each other in the X-axis direction. Multiple first trenches 61 are arranged to be spaced apart at equal pitches. The second trench 62 is a linear trench extending parallel to the X-axis direction. Multiple second trenches 62 are arranged to be spaced apart from each other in the Y-axis direction. Multiple second trenches 62 are arranged to be spaced apart at equal intervals.

[0039] With this configuration, the conductor layer 5 penetrates the resin layer 7. That is, the conductive wire 50 extends from the positive upper surface 7a to the negative lower surface 7b of the resin layer 7. The upper surface 50a of the conductive wire 50 extends to the same position as the upper surface 7a of the resin layer 7, or to a position near the upper surface 7a. The lower surface 50b of the conductive wire 50 is in contact with the main surface 1S of the light-transmitting substrate 1. Note that the state in which the conductor layer 5 penetrates the resin layer 7 means that the conductive wire 50 is positioned within the trench 60 of the resin layer 7, and extends to the main surface 1S of the light-transmitting substrate 1. Therefore, the upper surface 50a of the conductive wire 50 does not necessarily have to reach the upper surface 7a of the resin layer 7, and may be positioned on the negative side in the Z-axis direction from the upper surface 7a, as will be described later. The conductive wire 50 has sides 50c on both sides in the width direction (in this case, the X-axis direction). The sides 50c of the conductive wire 50 are positioned so as to be in contact with the sides 60a of the trench 60 in the width direction.

[0040] Next, the configuration of the conductor layer 5 will be described in more detail with reference to Figure 7. Figure 7 is an enlarged plan view of the conductor layer 5. As shown in Figure 7, the first conductive wire 51 has first edges 51a on both sides in the width direction (X-axis direction). The second conductive wire 52 has second edges 52a on both sides in the width direction (Y-axis direction). The conductor layer 5 has an intersection 53 where the first conductive wire 51 and the second conductive wire 52 intersect. The intersection 53 has a corner CN1 between the first edge 51a on the positive side in the X-axis direction and the second edge 52a on the positive side in the Y-axis direction, a corner CN2 between the first edge 51a on the positive side in the X-axis direction and the second edge 52a on the negative side in the Y-axis direction, a corner CN3 between the first edge 51a on the negative side in the X-axis direction and the second edge 52a on the positive side in the Y-axis direction, and a corner CN4 between the first edge 51a on the negative side in the X-axis direction and the second edge 52a on the negative side in the Y-axis direction.

[0041] Here, with reference to Figure 9(a), the method for setting the reference lines SL1 and SL2 will be explained. As shown in Figure 9(a), the edges 51a and 52a have an uneven shape. The edges 51a and 52a have a plurality of protrusions 56A that project outward in the width direction and a plurality of recesses 56B that recess inward. Of these, the line L is set with respect to the vertex of the outermost protrusion 56A. OUT Set the line L to the vertex of the innermost recessed part 56B. IN Set the line L. OUT ,L IN It extends parallel to the direction of extension of the conductive wires 51 and 52. Straight line L OUT and the straight line L IN The straight lines set at the midpoint between the two points are defined as reference lines SL1 and SL2. Reference lines SL1 and SL2 are set for edges 51a and 52a that exist in the range between a certain intersection 53 and an adjacent intersection 53.

[0042] As described above, in the plan view shown in Figure 7, a virtual first reference line SL1 is set for the first edge 51a, and a virtual second reference line SL2 is set for the second edge 52a. The first reference line SL1 approximates the first edge 51a and is a virtual straight line extending parallel to the extension direction of the first conductive wire 51 (here, the Y-axis direction). The second reference line SL2 approximates the second edge 52a and is a virtual straight line extending parallel to the extension direction of the second conductive wire 52 (here, the X-axis direction). In addition, a virtual reference point SP is set where the first reference line SL1 and the second reference line SL2 intersect. At one intersection 53, four reference points SP are set corresponding to the corners CN1, CN2, CN3, and CN4. The intersection 53 has a main body 55 drawn by a pair of first reference lines SL1 and a pair of second reference lines SL2. The main body 55 draws a quadrilateral with the four reference points SP.

[0043] The corners CN1, CN2, CN3, and CN4 of the intersection 53 have an extended portion 54 that extends outward. The extended portion 54 is the part that extends outward beyond the first reference line SL1 and the second reference line SL2. The edge portion 54a of the extended portion 54 extends from a position on the first edge portion 51a that is spaced away from the reference point SP in the Y-axis direction to a position on the second edge portion 52a that is spaced away from the reference point SP in the X-axis direction. The edge portion 54a of the extended portion 54 may be curved so as to be concave inward. However, the shape of the edge portion 54a of the extended portion 54 is not particularly limited, and it does not have to have a curved shape that is concave inward, and the edge portion 54a may extend in a substantially straight line or in a wave-like shape.

[0044] The extended portion 54 of the corner CN1 extends to the positive side in the X-axis direction relative to the first reference line SL1 and to the positive side in the Y-axis direction relative to the second reference line SL2. The edge portion 54a of the extended portion 54 of the corner CN1 extends from a position on the first edge portion 51a that is spaced away from the reference point SP in the positive side in the Y-axis direction to a position on the second edge portion 52a that is spaced away from the reference point SP in the positive side in the X-axis direction. The edge portion 54a of the extended portion 54 of the corner CN1 may be curved so as to be recessed on the negative side in the X-axis direction and recessed on the negative side in the Y-axis direction.

[0045] The extended portion 54 of the corner CN2 extends to the positive side in the X-axis direction relative to the first reference line SL1 and to the negative side in the Y-axis direction relative to the second reference line SL2. The edge 54a of the extended portion 54 of the corner CN2 extends from a position on the first edge 51a that is spaced away from the reference point SP on the negative side in the Y-axis direction to a position on the second edge 52a that is spaced away from the reference point SP on the positive side in the X-axis direction. The edge 54a of the extended portion 54 of the corner CN2 may be curved so as to be recessed on the negative side in the X-axis direction toward the positive side in the Y-axis direction.

[0046] The extended portion 54 of the corner CN3 extends to the negative side in the X-axis direction relative to the first reference line SL1 and to the positive side in the Y-axis direction relative to the second reference line SL2. The edge portion 54a of the extended portion 54 of the corner CN3 extends from a position on the first edge portion 51a that is spaced away from the reference point SP in the positive side in the Y-axis direction to a position on the second edge portion 52a that is spaced away from the reference point SP in the negative side in the X-axis direction. The edge portion 54a of the extended portion 54 of the corner CN3 may be curved so as to be concave on the positive side in the X-axis direction and concave on the negative side in the Y-axis direction.

[0047] The extended portion 54 of the corner CN4 extends to the negative side in the X-axis direction with respect to the first reference line SL1 and to the negative side in the Y-axis direction with respect to the second reference line SL2. The edge portion 54a of the extended portion 54 of the corner CN4 extends from a position on the first edge portion 51a that is spaced away from the reference point SP in the negative side in the Y-axis direction to a position on the second edge portion 52a that is spaced away from the reference point SP in the negative side in the X-axis direction. The edge portion 54a of the extended portion 54 of the corner CN4 may be curved on the positive side in the X-axis direction so as to be concave towards the positive side in the Y-axis direction.

[0048] Next, the extension portion 54 will be described in more detail with reference to Figure 8. Figure 8 is an enlarged view of the extension portion 54 at the corner CN4. Note that in Figure 8, the uneven shapes of the edges 51a, 52a, and 54a are emphasized for illustrative purposes. The first intersection point STP of the edge 54a of the extension portion 54 is set on the first reference line SL1, and the second intersection point GLP of the edge 54a of the extension portion 54 is set on the second reference line SL2. The method for setting the first intersection point STP will be described. Near the intersection 53, an intersection point is set where the first edge 51a of the first conductive wire 51 intersects the first reference line SL1. Here, intersection points P1a, P2a, P3a, and P4a are set in order from furthest from the reference point SP, that is, from the negative side to the positive side in the Y-axis direction. At this point, on the side of intersection P4a towards reference point SP, i.e., the positive side in the Y-axis direction, the first edge 51a of the first conductive wire 51 does not return to the first reference line SL1, but instead heads toward the negative side in the X-axis direction. This intersection P4a is set as the first intersection STP. In this way, among the intersections of the first edge 51a of the first conductive wire 51 and the first reference line SL1 near the corner CN4, the intersection closest to reference point SP is set as the first intersection STP. The method for setting the second intersection GLP will now be explained. Near the intersection 53, the intersection point where the edge 52a of the second conductive wire 52 intersects the second reference line SL2 is set. Here, intersections P1b, P2b, P3b, and P4b are set in order from furthest from reference point SP, i.e., from the negative side to the positive side in the X-axis direction. At this point, on the side of intersection P4b towards reference point SP, i.e., the positive side in the X-axis direction, the second edge 52a of the second conductive wire 52 does not return to the second reference line SL2, but instead extends toward the negative side in the Y-axis direction. This intersection P4b is set as the second intersection point GLP. In this way, among the intersections of the second edge 52a of the second conductive wire 52 near corner CN4 and the second reference line SL2, the intersection closest to reference point SP is set as point GLP. Also, the first intersection point where the edge 54a extending from the first intersection point STP intersects the second reference line SL2 is set as the second intersection point GLP.

[0049] Let the dimension of the virtual line segment connecting the first intersection point STP and the reference point SP be dimension a1. Let the dimension of the virtual line segment connecting the second intersection point GLP and the reference point SP be a2. Among dimension a1 and dimension a2, let the larger dimension be dimension a. When dimension a1 and dimension a2 are the same, both dimensions a1 and a2 are dimension a. In the example of FIG. 8, since dimension a1 is larger than dimension a2, dimension a1 is set as dimension a. As shown in FIG. 7, let the average width of the first conductive wire 51 be width b1. Let the average width of the second conductive wire 52 be width b2. Among width b1 and width b2, let the smaller dimension be width b. When width b1 and width b2 are the same, both widths b1 and b2 are width b. In the example shown in FIG. 7, since widths b1 and b2 are set to the same dimension, widths b1 and b2 are width b. In the enlarged portion 54 with the largest area in plan view at one intersection portion 53, dimension a is smaller than width b (a < b). The area of the enlarged portion 54 in plan view is set as the area of the region surrounded by the edge portion 54a, the side of dimension a1, and dimension a2. In the example shown in FIG. 7, among the four enlarged portions 54 at the corner portions CN1, CN2, CN3, and CN4, the area of the enlarged portion 54 at the corner portion CN4 is the largest. Therefore, for the enlarged portion 54 at the corner portion CN4, the relationship of "a < b" holds. For the enlarged portions 54 at the corner portions CN1, CN2, and CN3, the relationship of "a < b" also holds.

[0050] Let the dimension of the virtual line segment connecting the first intersection point STP and the second intersection point GLP be dimension c. When a virtual diagonal line DL connecting the first intersection point STP and the second intersection point GLP is set, the length of the diagonal line DL is dimension c. In the enlarged portion 54 with the largest area in plan view at one intersection portion 53, dimension c may be smaller than width b (c < b).

[0051] The sum of the areas of the multiple extensions 54 at one intersection 53 may be less than the area of ​​the quadrilateral formed by the four reference points SP. In the example shown in Figure 7, the sum of the areas of the extensions 54 at corner CN1, corner CN2, corner CN3, and corner CN4 is less than the area of ​​the quadrilateral of the main body 55. Furthermore, if the maximum area of ​​the multiple extensions 54 at one intersection 53 is S1 and the minimum area is S2, then the following equation (1) may hold. In the example shown in Figure 7, the area of ​​the extension 54 at corner CN4 is the largest, so the area of ​​the extension 54 at corner CN4 is S1. The area of ​​the extension 54 at corner CN2 is the smallest, so the area of ​​the extension 54 at corner CN2 is S2. (S1-S2) / S2 < 1 …(1)

[0052] As shown in Figure 10, a region TE is set to define the area of ​​the entire intersection 53. A virtual connecting line JL is set between adjacent extensions 54 in the Y-axis direction, connecting the ends of their respective edges 54a, and a virtual connecting line JL is set between adjacent extensions 54 in the X-axis direction, connecting the ends of their respective edges 54a. The region defined by the four connecting lines JL and the edges 54a of the four extensions 54 is defined as region TE. In this case, the area of ​​region TE may be 3.5 times or less the area of ​​the main body 55. This prevents the overall size of the intersection 53, including the extensions 54, from becoming too large, and reduces the visibility of the intersection 53. In order to make the area of ​​region TE 3.5 times or less the area of ​​the main body 55, the above-mentioned dimension a (see Figure 8) may be 1 / 2 or less the width b of the conductive wire 50. Furthermore, in order to keep the area of ​​region TE 3.5 times or less the area of ​​the main body 55, the length of the diagonal line CRL connecting the edges 54a of the diagonally positioned extensions 54 may be less than twice the width b of the conductive wire 50. The diagonal line CRL passes through the reference points SP that are diagonally positioned.

[0053] The surface roughness of the side surface 51c of the first conductive wire 51 is smaller than the surface roughness of the upper surface 51b of the first conductive wire 51, and the surface roughness of the side surface 52c of the second conductive wire 52 may be smaller than the surface roughness of the upper surface 52b of the second conductive wire 52 (see also FIG. 6). The surface roughness of the side surface 50c of the conductive wire 50 is not particularly limited, but may be 150 nm or less. In this case, it is possible to suppress an increase in the visibility of the conductive wire 50. Further, the surface roughness of the side surface 54b of the extension portion 54 may be smaller than the surface roughness of the upper surfaces 51b and 52b of the first conductive wire 51 and the second conductive wire 52 (see FIG. 8). The surface roughness of the side surface 54b of the extension portion 54 is not particularly limited, but may be 100 nm or less.

[0054] Referring to FIG. 9(b), a method for measuring the surface roughness of the side surface 50c of the conductive wire 50 will be described. Here, the roughness of the edges 51a and 52a in a plan view is regarded as the surface roughness of the side surfaces 51c and 52c. As described above, in FIG. 9(a), with respect to the apex of the protruding portion 56A that protrudes most outward, a straight line L OUT is set, and with respect to the apex of the recessed portion 56B that is recessed most inward, a straight line L IN is set. As shown in FIG. 9(b), the length between the straight line L OUT and the straight line L IN is defined as the surface roughness SR1 of the side surface 50c of the conductive wire 50.

[0055] Referring to FIG. 8, a method for measuring the surface roughness of the side surface 54b of the extension portion 54 will be described. Here, the roughness of the edge 54a in a plan view is regarded as the surface roughness of the side surface 54b. As described above, a virtual diagonal line DL connecting the first intersection point STP and the second intersection point GLP is set. In a plan view, among the edges 54a of the extension portion 54, the distance from the diagonal line DL at the location where the distance from the diagonal line DL is the farthest is defined as the surface roughness SR2 of the side surface 54b.

[0056] Referring to Figure 11, a method for measuring the surface roughness of the upper surfaces 51b and 52b of the conductive wires 51 and 52 will be described. When the upper surfaces 51b and 52b of the conductive wires 51 and 52 are measured with a measuring instrument (e.g., a laser microscope), height information can be obtained for each position on the upper surfaces 51b and 52b, as shown in Figure 11. The height of the highest point within the measurement range is set to the maximum value H. MAX The height of the lowest point is obtained as the minimum value H. MIN It is obtained as the maximum value H. MAX and minimum value H MIN The difference is defined as the surface roughness SR3 of the upper surface 50a.

[0057] In the example shown in Figure 5, a mesh shape of a fixed size square is used as an example for the mesh shape of the conductor layer 5, but the mesh shape is not particularly limited. For example, a rectangular mesh shape may be used, a rhombus mesh shape may be used, or a mesh shape with random size and shape may be used.

[0058] For example, as shown in Figure 12, when the angle θ between the first reference line SL1 and the second reference line SL2 is 90° or less, the ratio of dimension a to width b, "a / b", tends to be large. In contrast, in the extended section 24 where the angle θ between the first reference line SL1 and the second reference line SL2 is 90° or less, the larger dimension a of the imaginary line segment a1 connecting the first intersection point STP and the reference point SP, and the larger dimension a2 connecting the imaginary line segment a2 connecting the second intersection point GLP and the reference point SP, can be smaller than the smaller width b of the first conductive wire 51, b1 and b2 of the second conductive wire 52. In other words, for the extended section 24 where the angle θ is 90° or less, the ratio of "a / b" can be less than 1.

[0059] Here, for the intersection, we prepared "Sample 1," "Sample 2," and "Sample 3" for three angles "θ = 45°, 90°, and 135°," and measured "a / b." As shown in Figure 13, the measurement results were plotted on a graph with angle on the horizontal axis and "length ratio (a / b)" on the vertical axis. For "Sample 1," "a / b" was able to be less than 1 regardless of the angle θ. We set an approximation line AP1 for the plot of "Sample 1," an approximation line AP2 for the plot of "Sample 2," and an approximation line AP3 for the plot of "Sample 3." When the horizontal axis is "x" and the vertical axis is "y," the approximation line AP1 becomes "y = -0.0017x + 0.4767," the approximation line AP2 becomes "y = -0.0189x + 3.25," and the approximation line AP3 becomes "y = -0.0533x + 8.5333." Furthermore, "a / b < 1" is also acceptable when the angle of the intersection is right, acute, or obtuse.

[0060] As described above, the manufacturing method for making the expansion portion 54 of an appropriate size and smoothing the side surface 50c of the conductive wire 50 and the side surface 54b of the expansion portion 54 is not particularly limited, and any method may be used as long as the desired shape can be obtained. For example, a resin layer 7 having a trench 60 may be formed in advance, and the conductive wire 50 may be formed in the trench 60. Alternatively, the conductive wire 50 may be formed on a substrate, and the expansion portion 54, etc., may be smoothed. In addition, a method may be employed in which a trench shape is formed using a resist, a conductor is filled into the trench, and then the resist is removed to form only the conductor.

[0061] Next, the operation and effects of the wiring body 200 and the display device 100 according to this embodiment will be described.

[0062] The wiring body 200 according to this embodiment comprises a light-transmitting substrate 1 and a conductor layer 5 formed by arranging a plurality of first conductive wires 51 and a plurality of second conductive wires 52 in a mesh pattern on the light-transmitting substrate 1. The first conductive wires 51 have first edges 51a on both sides in the width direction, and the second conductive wires 52 have second edges 52a on both sides in the width direction. The conductor layer 5 has intersections 53 where the first conductive wires 51 and the second conductive wires 52 intersect. In a plan view, if a virtual first reference line SL1 is set, which is a straight line parallel to the extending direction of the first conductive wire 51 that approximates the first edge 51a, and a virtual second reference line SL2 is set, which is a straight line parallel to the extending direction of the second conductive wire 52 that approximates the second edge 52a, and a virtual reference point SP is set where the first reference line SL1 and the second reference line SL2 intersect, then the corners CN1, CN2, CN3, and CN4 of the intersection 53 have extended portions 54 that extend outward beyond the reference lines SL1 and SL2. When the first intersection point STP of the edge 54a of the extension 54 is set on the first reference line SL1, and the second intersection point GLP of the edge 54a of the extension 54 is set on the second reference line SL2, in the extension 54 with the largest area in plan view at one intersection 53, the larger of the dimensions a1 of the virtual line segment connecting the first intersection point STP and the reference point SP, and the larger of the dimensions a2 of the virtual line segment connecting the second intersection point GLP and the reference point SP, is smaller than the smaller of the average width b1 of the first conductive wire 51 and the average width b2 of the second conductive wire 52.

[0063] Here, as a comparative example, consider the configuration shown in Figure 7 in which the intersection 53 is not provided with an extension portion 54, and the intersection 53 is formed only by the main body portion 55. In this comparative example, at the corners CN1, CN2, CN3, and CN4, a sharp edge is formed that curves inward, with the first edge portion 51a and the second edge portion 52a intersecting in a roughly L-shape. In this case, the current flowing through the intersection 53 tends to concentrate at the edge portion. In contrast, in the wiring body 200 according to this embodiment, the corners CN1, CN2, CN3, and CN4 of the intersection 53 have an extension portion 54 that extends outward. Therefore, the extension portion 54 smooths the flow of current, thereby suppressing current concentration. On the other hand, as another comparative example, consider the configuration having an intersection 53 as shown in Figure 14. In this comparative example, the dimension a of the extension portion 54 of the corner CN1, which has the largest area, is larger than the width b of the conductive wire 50. Thus, when the intersection 53 has a large extension 54, there is a problem that the visibility of the conductor layer 5 near the intersection 53 increases. In contrast, in the wiring body 200 according to this embodiment, in the extension 54 with the largest area, the larger dimension a of the imaginary line segment a1 connecting the first intersection STP and the reference point SP, and the larger dimension a2 of the imaginary line segment connecting the second intersection GLP and the reference point SP, is smaller than the smaller width b of the average width b1 of the first conductive wire 51 and the smaller width b2 of the average width b2 of the second conductive wire 52. As a result, the size of each extension 54 at the intersection 53 can be kept small. Therefore, the visibility of the conductor layer 5 at the intersection 53 can be suppressed. Thus, it is possible to suppress the concentration of current at the intersection 53 of the conductive wires 51 and 52 while suppressing the increased visibility of the conductor layer 5.

[0064] The edges 54a of the extension portion 54 may be curved inward. In this case, a smooth current path can be formed near the corners CN1, CN2, CN3, and CN4. Therefore, current concentration can be suppressed. Not all four extension portions 54 are curved; at least one extension portion may be curved.

[0065] In the extended section 54 with the largest area in plan view at one intersection 53, the dimension c of the imaginary line segment connecting the first intersection STP and the second intersection GLP may be smaller than the smaller of the average width b1 of the first conductive wire 51 and the average width b2 of the second conductive wire 52. In this case, the size of the extended section 54 can be kept small, and an increase in the visibility of the conductor layer 5 can be suppressed.

[0066] The sum of the areas of the multiple extensions 54 at one intersection 53 may be smaller than the area of ​​the rectangle formed by the four reference points SP. In this case, the size of the extensions 54 can be kept small, and an increase in the visibility of the conductor layer 5 can be suppressed.

[0067] If, among the multiple extensions 54 at a single intersection 53, the maximum area is S1 and the minimum area is S2, then the following equation (1) may hold. In this case, it is possible to prevent the size of the extension 54 with the largest area from becoming too large compared to the other extensions 54, and to suppress an increase in the visibility of the conductor layer 5. (S1-S2) / S2 < 1 …(1)

[0068] The surface roughness of the side surface 51c of the first conductive wire 51 may be smaller than the surface roughness of the top surface 51b of the first conductive wire 51, and the surface roughness of the side surface 52c of the second conductive wire 52 may be smaller than the surface roughness of the top surface 52b of the second conductive wire 52. When the cross-sectional shape of the conductive wires 51 and 52 (see Figure 6) has a high aspect ratio, reducing the surface roughness of the side surfaces 51c and 52c can suppress an increase in the resistance of high-frequency currents while suppressing an increase in the visibility of the conductor layer 5.

[0069] The surface roughness of the side surface 54b of the extension portion 54 may be less than the surface roughness of the upper surfaces 51b and 52b of the first conductive wire 51 and the second conductive wire 52. When the cross-sectional shape of the conductive wires 51 and 52 (see Figure 6) has a high aspect ratio, reducing the surface roughness of the side surface 54b of the extension portion 54 can suppress an increase in the resistance of high-frequency currents while suppressing an increase in the visibility of the conductor layer 5.

[0070] In the extension section 54 where the angle θ between the first reference line SL1 and the second reference line SL2 is 90° or less, the larger of the two dimensions a (a1) of the imaginary line segment connecting the first intersection point STP and the reference point SP, and the larger of the two dimensions a2 (a2) of the imaginary line segment connecting the second intersection point GLP and the reference point SP, may be smaller than the smaller of the two dimensions b (b1) of the average width of the first conductive wire 51 and the average width b2 of the second conductive wire 52. In this case, even at locations where the angle θ at the corner is acute, it is possible to suppress an increase in the size of the extension section 54.

[0071] A display device 100 relating to one aspect of this disclosure includes the wiring assembly 200 described above.

[0072] The display device 100 described above can be used to obtain the same functions and effects as the wiring assembly 200 described above.

[0073] This disclosure is not limited to the embodiments described above.

[0074] For example, the shapes of the conductive wire 50 and the resin layer 7 are not limited to those shown in Figure 6 and can be modified as appropriate without departing from the spirit of this disclosure. The height dimensions and width dimensions of each part, as well as the aspect ratio relationships, are also not limited to the embodiments described above and can be modified as appropriate. Furthermore, the shape and size of the extension portion 54 can be modified as appropriate without departing from the spirit of this disclosure.

[0075] In the embodiments described above, a display device was given as an example of an application for the wiring 200. However, the application of the wiring 200 is not particularly limited and can be applied to various devices where it is necessary to suppress the visibility of a mesh-like conductor layer, such as smart glasses, transparent cards, transparent displays, and transparent heaters.

[0076] [Form 1] Substrate and The device comprises a conductor layer formed by arranging a plurality of first conductive wires and a plurality of second conductive wires in a mesh pattern on the substrate, The first conductive wire has first edges on both sides in the width direction, and the second conductive wire has second edges on both sides in the width direction. The conductor layer has an intersection where the first conductive wire and the second conductive wire intersect. In a plan view, if a virtual first reference line is set, which is a straight line parallel to the extending direction of the first conductive wire approximating the first edge, a virtual second reference line is set, which is a straight line parallel to the extending direction of the second conductive wire approximating the second edge, and a virtual reference point is set where the first reference line and the second reference line intersect, The corner of the intersection has an extended portion that extends outward beyond the first reference line and the second reference line. When the first reference line is set to the first intersection point of the edge of the extended portion, and the second reference line is set to the second intersection point of the edge of the extended portion, In the extended portion with the largest area in plan view at one of the intersections, the larger of the dimensions of the imaginary line segment connecting the first intersection and the reference point and the dimensions of the imaginary line segment connecting the second intersection and the reference point is smaller than the smaller of the average width of the first conductive wire and the average width of the second conductive wire, in a wiring body. [Form 2] The wiring body according to Embodiment 1, wherein the edge of the expanded portion is curved inward so as to be recessed. [Form 3] The wiring assembly according to claim 1, wherein in the extended portion with the largest area in plan view at one of the intersections, the dimension of the imaginary line segment connecting the first intersection and the second intersection is smaller than the smaller of the average width of the first conductive wire and the average width of the second conductive wire. [Form 4] The wiring body according to any one of the embodiments 1 to 3, wherein the sum of the areas of the multiple extensions at one of the intersections is less than the area of ​​the quadrilateral formed by the four reference points. [Form 5] A wiring body according to any one of the embodiments 1 to 4, wherein, among the multiple extensions at one of the intersections, if the maximum area is S1 and the minimum area is S2, the following equation (1) holds true. (S1-S2) / S2 < 1 …(1) [Form 6] The wiring body according to any one of embodiments 1 to 5, wherein the surface roughness of the side surface of the first conductive wire is less than the surface roughness of the upper surface of the first conductive wire, and the surface roughness of the side surface of the second conductive wire is less than the surface roughness of the upper surface of the second conductive wire. [Form 7] The wiring body according to any one of embodiments 1 to 6, wherein the surface roughness of the side surface of the extended portion is smaller than the surface roughness of the upper surfaces of the first conductive wire and the second conductive wire. [Form 8] The wiring body according to claim 1, in the extended portion where the angle between the first reference line and the second reference line is 90° or less, the larger of the dimensions of the imaginary line segment connecting the first intersection and the reference point and the dimensions of the imaginary line segment connecting the second intersection and the reference point is smaller than the smaller of the average width of the first conductive wire and the average width of the second conductive wire. [Form 9] A display device comprising a wiring assembly as described in any one of Forms 1 to 8. [Explanation of symbols]

[0077] 1...Light-transmitting substrate (substrate), 5...Conducting layer, 51...First conductive wire, 52...Second conductive wire, 53...Intersection, 54...Expansion section, 100...Display device, 200...Wiring body.

Claims

1. Substrate and The device comprises a conductor layer formed by arranging a plurality of first conductive wires and a plurality of second conductive wires in a mesh pattern on the substrate, The first conductive wire has first edges on both sides in the width direction, and the second conductive wire has second edges on both sides in the width direction. The conductor layer has an intersection where the first conductive wire and the second conductive wire intersect. In a plan view, if a virtual first reference line is set, which is a straight line parallel to the extending direction of the first conductive wire approximating the first edge, a virtual second reference line is a straight line parallel to the extending direction of the second conductive wire approximating the second edge, and a virtual reference point is set where the first reference line and the second reference line intersect, The corner of the intersection has an extended portion that extends outward beyond the first reference line and the second reference line. When the first reference line is set to the first intersection point of the edge of the extended portion, and the second reference line is set to the second intersection point of the edge of the extended portion, In the extended portion with the largest area in plan view at one of the intersections, the larger of the dimensions of the imaginary line segment connecting the first intersection and the reference point and the dimensions of the imaginary line segment connecting the second intersection and the reference point is smaller than the smaller of the average width of the first conductive wire and the average width of the second conductive wire, in a wiring body.

2. The wiring body according to claim 1, wherein the edge of the expanded portion is curved so as to be recessed inward.

3. The wiring assembly according to claim 1, wherein in the extended portion with the largest area in plan view at one of the intersections, the dimension of the imaginary line segment connecting the first intersection and the second intersection is smaller than the smaller of the average width of the first conductive wire and the average width of the second conductive wire.

4. The wiring assembly according to claim 1, wherein the sum of the areas of the multiple extensions at one of the intersections is less than the area of ​​the quadrilateral formed by the four reference points.

5. The wiring assembly according to claim 1, wherein, among the multiple extensions at one intersection, if the maximum area is S1 and the minimum area is S2, the following equation (1) holds true. (S1-S2) / S2 < 1...(1)

6. The wiring assembly according to claim 1, wherein the surface roughness of the side surface of the first conductive wire is less than the surface roughness of the upper surface of the first conductive wire, and the surface roughness of the side surface of the second conductive wire is less than the surface roughness of the upper surface of the second conductive wire.

7. The wiring body according to claim 1, wherein the surface roughness of the side surface of the extended portion is smaller than the surface roughness of the upper surfaces of the first conductive wire and the second conductive wire.

8. The wiring assembly according to claim 1, in the extended portion where the angle between the first reference line and the second reference line is 90° or less, the larger of the dimensions of the imaginary line segment connecting the first intersection and the reference point and the dimensions of the imaginary line segment connecting the second intersection and the reference point is smaller than the smaller of the average width of the first conductive wire and the average width of the second conductive wire.

9. A display device comprising a wiring body according to any one of claims 1 to 8.

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