Elastic device

Abstract

Provided is an elastic device comprising an elastic base material and a plurality of elastic wires provided on the elastic base material. The elastic base material has a base material opening with which at least one main surface side of the base material is open. The plurality of elastic wires include a first elastic wire and a second elastic wire, the first elastic wire and the second elastic wire being spaced apart from each other and facing each other with the base material opening therebetween.

Description

stretchable devices

[0001] The present disclosure relates to stretchable devices.

[0002] Conventionally, stretchable devices having portions with different degrees of stretchability have been used in some cases. Specifically, a single stretchable device may be provided with a highly stretchable portion and a less stretchable portion.

[0003] International Publication No. 2018 / 168734 Japanese Patent Application Laid-Open No. 2018-164015

[0004] In the past, stretchable devices sometimes adopted a configuration in which two different types of resin substrates were connected, with one resin substrate providing a more stretchable portion and the other resin substrate providing a less stretchable portion (see Patent Document 1). However, such a configuration is difficult to manufacture due to its complex structure, and there is a risk that it may be difficult to ensure high reliability at the joint between the different types of resin substrates.

[0005] Furthermore, in the past, there have been cases where highly stretchable portions have been realized by narrowing the width of stretchable wiring compared to less stretchable portions (see Patent Document 2). However, in such a configuration, if a force greater than necessary is applied to the stretchable device, the narrower width portion for achieving a highly stretchable configuration is more likely to twist or break due to its relatively lower rigidity compared to the less stretchable portion, and as a result, there is a concern that it may be more likely to break.

[0006] For these reasons, there is a need for a stretchable device that has a simple configuration and is capable of reducing the risk of breakage in highly stretchable parts.

[0007] Therefore, an object of the present disclosure is to provide a stretchable device that has a simple configuration and is capable of reducing the risk of breakage of highly stretchable parts.

[0008] In order to achieve the above object, in one embodiment of the present disclosure, there is provided a stretchable device comprising a stretchable substrate and a plurality of stretchable wirings provided on the stretchable substrate, wherein the stretchable substrate has a substrate opening that is open on at least one main surface side, the plurality of stretchable wirings include a first stretchable wiring and a second stretchable wiring, and the first stretchable wiring and the second stretchable wiring are spaced apart and face each other across the substrate opening.

[0009] A stretchable device according to an embodiment of the present disclosure can have a simple configuration and can reduce the risk of breakage of highly stretchable portions.

[0010] FIG. 1 is a plan view schematically showing a stretchable device according to a first embodiment of the present disclosure. FIG. 2 is a plan view schematically showing a stretchable device according to a second embodiment of the present disclosure. FIG. 3 is a plan view schematically showing a stretchable device according to a third embodiment of the present disclosure. FIG. 4 is a plan view schematically showing a stretchable device according to a fourth embodiment of the present disclosure. FIG. 5 is a plan view schematically showing a stretchable device according to a fifth embodiment of the present disclosure. FIG. 6 is a plan view schematically showing a stretchable device according to a sixth embodiment of the present disclosure. FIG. 7 is a plan view schematically showing a stretchable device according to a seventh embodiment of the present disclosure. FIG. 8 is a plan view schematically showing a stretchable device according to an eighth embodiment of the present disclosure. FIG. 9 is a plan view schematically showing a stretchable device according to a ninth embodiment of the present disclosure.

[0011] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. In each embodiment, differences from those previously described will be mainly described. In particular, similar effects resulting from similar configurations will not be mentioned in each embodiment. Among the components in the following embodiments, components not recited in independent claims will be described as optional components. Furthermore, the size and size ratios of components shown in the drawings are not necessarily strict. Furthermore, in each figure, substantially identical components are assigned the same reference numerals, and duplicated descriptions may be omitted or simplified.

[0012] In this specification, "above" includes a state where the wire is located above a certain element, i.e., above a certain element via another object, a state where the wire is located above a certain element with a gap therebetween, and a state where the wire is located directly above a certain element. Therefore, in this specification, "a stretchable wiring provided on a stretchable substrate" can include a stretchable wiring in a state where the wire is in contact with the main surface of the stretchable substrate, and a stretchable wiring in a state where the wire is not in direct contact with the main surface of the stretchable substrate but is separated from the main surface via another member (for example, a resin layer).

[0013] First Embodiment Hereinafter, the configuration of a stretchable device 100 according to a first embodiment will be described with reference to FIG.

[0014] FIG. 1 is a plan view schematically illustrating a stretchable device according to a first embodiment of the present disclosure.

[0015] The main components of the stretchable device 100 according to the first embodiment will be described below. After describing each component, the characteristic parts of the first embodiment will be described. In the corresponding drawings below, the main stretch direction of the stretchable substrate in the stretchable device 100 will be indicated as "d". This also applies to the second and subsequent embodiments described below.

[0016] The stretchable device 100 according to the first embodiment of the present disclosure includes a stretchable substrate 10 and a plurality of stretchable wires 20 provided on the stretchable substrate 10. The plurality of stretchable wires 20 include a first stretchable wire 21 and a second stretchable wire 22.

[0017] (Stretchable substrate) The stretchable substrate 10 is a sheet-like or film-like stretchable substrate, and is made of, for example, a stretchable resin material. Examples of the resin material for the stretchable substrate include elastomer resin materials such as olefin-based resins, urethane-based resins, and silicone-based resins. The thickness of the stretchable substrate is not particularly limited, but is preferably 100 μm or less from the viewpoint of not inhibiting stretching. Furthermore, the thickness of the stretchable substrate is preferably 20 μm or more from the viewpoint of ensuring a predetermined strength.

[0018] (Stretchable Wiring) The stretchable wiring 20 contains conductive particles and a resin. For example, the stretchable wiring 20 may be a mixture of conductive particles such as metal powder of Ag, Cu, Ni, or the like, and an elastomer resin such as a silicone resin. The average particle size of the conductive particles is not particularly limited, but is preferably 0.01 μm or more and 10 μm or less. Furthermore, the conductive particles are preferably spherical in shape.

[0019] The thickness of the elastic wire 20 is not particularly limited, but is preferably 100 μm or less, and more preferably 50 μm or less. The thickness of the elastic wire 20 is preferably 0.01 μm or more. The line width of the elastic wire is not particularly limited, but is preferably 0.1 μm or more, and more preferably 10 mm or less.

[0020] [Characteristic Parts of the First Embodiment] Under the above configuration, the first embodiment has the following two features. Specifically, as a first feature, the stretchable substrate 10 has a substrate opening 12 that is open on at least one main surface 11 side along the thickness direction of the stretchable substrate 10. The substrate opening 12 may be an opening that penetrates the stretchable substrate 10 along the thickness direction. In addition to this, as a second feature, the first stretchable wiring 21 and the second stretchable wiring 22 may be arranged so as to be spaced apart and facing each other with the substrate opening 12 between them. The positional relationship between these two wirings is based on the shape in a plan view as shown in FIG. 1 .

[0021] According to the first feature, it is possible to provide a highly elastic portion by forming the substrate opening 12 without narrowing the width of the elastic wiring compared to the less elastic portion, as was conventionally the case. Therefore, it is possible to avoid twisting and breaking of the highly elastic portion due to relatively low rigidity, etc., and as a result, it is possible to reduce the risk of breakage of the highly elastic portion.

[0022] Compared to conventional methods, the formation of the substrate openings 12 provides highly stretchable portions, so that it is possible to provide a stretchable substrate 10 that includes highly stretchable portions and less stretchable portions (which may also be referred to as rigid portions) within a single substrate without the need to bond different types of resin substrates. This makes it possible to provide a stretchable device 100 that includes a stretchable substrate 10 with a simple configuration. In other words, it is possible to provide a stretchable device 100 with a simpler overall configuration than conventional methods.

[0023] Furthermore, stress may occur at the location where the stretchable wiring is formed when the device stretches and contracts. In this regard, since the first stretchable wiring 21 and the second stretchable wiring 22 are arranged opposite each other with the substrate opening 12 in between, the difference in stress that may occur on each side of the substrate opening 12 can be made smaller than when a stretchable wiring is arranged on only one side of the substrate opening 12.

[0024] Specifically, the difference in stress that may occur on each side of the substrate opening 12 when an elastic wiring is arranged on both one side and the other side of the substrate opening 12 can be made smaller than the difference in stress that may occur on each side of the substrate opening 12 when an elastic wiring is arranged on only one side of the substrate opening 12 and no elastic wiring is arranged on the other side.

[0025] This makes it possible to suppress stress concentration and uneven distribution of stress, thereby reducing the risk of breakage at the location where stress occurs within the device.

[0026] As described above, the stretchable device 100 of the first embodiment can have a simple configuration overall, and can suitably reduce the risk of breakage of highly stretchable portions, etc.

[0027] In the above, it is preferable that the first elastic wire 21 and the second elastic wire 22 are arranged in line symmetry with respect to the substrate opening 12. Such an line symmetrical arrangement makes it possible to distribute and uniformize the locations where stress that may occur in the wires when the device expands and contracts, without biasing the locations where the stress occurs.

[0028] The following aspects are preferably adopted for the positional relationship between the stretchable wiring 20 and the substrate opening 12, from the viewpoint of suitably reducing the risk of breakage of the stretchable wiring 20 and the stretchable substrate 10. Specifically, the ratio of the shortest distance L2 between the longitudinal central axis 23 of the second stretchable wiring 22 and the outer edge 13 of the substrate opening 12 to the shortest distance L1 between the longitudinal central axis 23 of the first stretchable wiring 21 and the outer edge 13 of the substrate opening 12 can be 0.3 or more and 2.0 or less, preferably 0.6 or more and 1.5 or less, and more preferably 0.9 or more and 1.1 or less.

[0029] The planar shape of the substrate opening 12 is not particularly limited, but may be, for example, a rectangle, a square, a circle, etc. In addition, in order to prevent breakage of the outline of the substrate that forms the substrate opening 12, in the case of a rectangle or the like, it is preferable that each corner be rounded.

[0030] In addition, the second elastic wiring 22 may be made of the same material as the first elastic wiring 21, and the wiring width of the second elastic wiring 22 may be 80% or more and 120% or less of the wiring width of the first elastic wiring 21.

[0031] The stretchable device of the first embodiment can be produced by the following method. Specifically, a stretchable substrate 10 is prepared, and a substrate opening 12 can be formed at a predetermined location on the stretchable substrate 10, for example, by punching using a Pinnacle (registered trademark) blade, laser processing, or the like, at least partially from the main surface on which the stretchable wiring 20 is to be installed toward the opposite main surface. Then, the stretchable wiring 20 is arranged on both sides of the substrate opening 12, facing each other at a predetermined interval. In this manner, the stretchable device 100 can be produced.

[0032] Other embodiments, including the second embodiment, will be described below. The following description will mainly focus on differences from the first embodiment and / or previously described embodiments with similar configurations. As with the first embodiment, the characteristic features of each embodiment are based on the shape in a plan view.

[0033] Second Embodiment Hereinafter, a second embodiment will be described. Fig. 2 is a plan view schematically showing a stretchable device according to a second embodiment of the present disclosure.

[0034] The second embodiment differs from the first embodiment in that it further includes an electrode section 30A provided on a stretchable substrate 10A.

[0035] In this case, in the second embodiment, one of the elastic wirings 20A (e.g., the first elastic wiring 21A) and the electrode section 30A are continuous with each other, while the other elastic wiring 20A (e.g., the second elastic wiring 22A) and the electrode section 30A are not in contact with each other.

[0036] The electrode sections 30A can be arranged outside the contour of the substrate opening 12A so as to extend in directions different from the longitudinal extension direction of each stretchable wire 20A. Furthermore, the electrode sections 30A can be arranged outside the contour of the substrate opening 12A so as to extend from one stretchable wire 20A towards the other stretchable wire 20A. The planar shape of the electrode sections 30A is not particularly limited and can be, for example, square, rectangular, circular, etc.

[0037] That is, in a plan view, the first elastic wiring 21A, the electrode section 30A, and the second elastic wiring 22A can be arranged so as to surround a part of the substrate opening 12A. As an example, if the planar shape of the substrate opening 12A is rectangular, the first elastic wiring 21A, the electrode section 30A, and the second elastic wiring 22A can be arranged so as to surround three sides of the rectangular substrate opening 12A.

[0038] Because of this configuration, the first elastic wiring 21A and the second elastic wiring 22A are not electrically connected to each other, and the second elastic wiring 22A can function as a dummy wiring. Furthermore, since the first elastic wiring 21A and the second elastic wiring 22A can be arranged so as to be spaced apart and facing each other across the substrate opening 12A, similar to the first embodiment, it is possible to have a simple overall configuration and to suitably reduce the risk of breakage of highly elastic portions, etc. From the viewpoint of further reducing the risk of breakage of the highly elastic portions, etc., the number of dummy wirings can be multiple.

[0039] In an embodiment in which the electrode section 30A is provided, it is preferable that the length of the electrode section 30A in the width direction of the stretchable wiring (i.e., the vertical direction in FIG. 2) is longer than the length of the substrate opening 12A. In this case, it is possible to make the amounts of stretch of predetermined locations of the stretchable substrate 10A that form the substrate opening 12A in the width direction of the stretchable wiring (i.e., predetermined locations of the stretchable substrate 10A located above and below the substrate opening 12A in a plan view) closer to uniform.

[0040] Also, in the second embodiment, the second elastic wiring 22A as a dummy wiring may be made of the same material as the first elastic wiring 21A, and the wiring width of the second elastic wiring 22A may be 80% or more and 120% or less of the wiring width of the first elastic wiring 21A.

[0041] Third Embodiment Hereinafter, a third embodiment will be described. Fig. 3 is a plan view schematically showing a stretchable device according to a third embodiment of the present disclosure.

[0042] The third embodiment differs from the second embodiment in that the first elastic wiring 21B and the second elastic wiring 22B are continuous with each other via the electrode section 30B.

[0043] In this case, in the third embodiment, one of the elastic wirings 20B (e.g., the first elastic wiring 21B) and the electrode section 30B are continuous with each other, and the other elastic wiring 20B (e.g., the second elastic wiring 22B) and the electrode section 30B are also continuous with each other.

[0044] By adopting such a configuration, the first elastic wire 21B and the second elastic wire 22B can be electrically connected to each other. Therefore, it is possible to preferably prevent one of the elastic wires 20B (for example, the second elastic wire 22B) from becoming a noise source due to receiving external noise. This makes it possible to preferably prevent noise from being transmitted to the other elastic wire 20B (for example, the first elastic wire 21B).

[0045] Fourth Embodiment A fourth embodiment will now be described. Fig. 4 is a plan view schematically showing a stretchable device according to a fourth embodiment of the present disclosure.

[0046] The fourth embodiment differs from the first to third embodiments in that a plurality of substrate openings 12C provided in a stretchable substrate 10C are arranged at predetermined intervals in the stretch direction d.

[0047] When multiple substrate openings 12C are arranged, multiple highly stretchable portions can be provided, which allows the stretchable device 100C to flexibly meet the needs for complex stretchability.

[0048] In the fourth embodiment, the planar size and / or planar shape of the plurality of substrate openings 12C can be the same. In this case, it is possible to more uniformly distribute stress that may occur in each substrate opening 12C when the device expands or contracts, thereby suitably reducing the risk of breakage of the stretchable substrate 10C. From the viewpoint of more suitably uniformizing such stress, it is preferable that the planar size and planar shape of the plurality of substrate openings 12C are both the same.

[0049] Fifth Embodiment Hereinafter, a fifth embodiment will be described. Fig. 5 is a plan view schematically showing a stretchable device according to a fifth embodiment of the present disclosure.

[0050] The fifth embodiment differs from the fourth embodiment in that it includes a substrate opening 12D having a different planar size.

[0051] 5, the stretchable substrate 10D includes a first substrate opening 12D1 having a relatively large planar size and a second substrate opening 12D2 having a relatively small planar size. By providing the substrate openings 12D having different planar sizes, it is possible to change the stretch rate between the two.

[0052] That is, a magnitude relationship can be established between the stretchability of the first substrate opening 12D1 and the stretchability of the second substrate opening 12D2. Specifically, the stretchability of the first substrate opening 12D1 can be made greater than the stretchability of the second substrate opening 12D2. This allows the stretchable device 100D to flexibly meet the demands of complex stretchability characteristics.

[0053] Sixth Embodiment A sixth embodiment will now be described. Fig. 6 is a plan view schematically showing a stretchable device according to a sixth embodiment of the present disclosure.

[0054] The sixth embodiment differs from the first to fifth embodiments in that it further includes a covering member 40E.

[0055] In the sixth embodiment, the covering member 40E has a covering member opening 42E. This covering member 40E can be configured to cover the stretchable substrate, specifically, the portions of the stretchable substrate other than the substrate opening 12E, and the multiple stretchable wires 20E (first stretchable wires 21E and second stretchable wires 22E).

[0056] According to this configuration, as an example, the electrode section 30E, the stretchable wiring 20E, or the stretchable substrate located directly below the covering member opening 42E can be locally exposed as shown in the drawing. The substrate opening 12E can also be exposed.

[0057] In the illustrated embodiment, the covering member opening 42E and the electrode unit 30E are arranged to overlap each other so that a portion of the electrode unit 30E is exposed. The covering member opening 42E can be used to bring the electrode unit 30E and the like into contact with a living body, enabling transmission and reception of electrical signals.

[0058] Furthermore, the planar size of the substrate opening 12E is preferably larger than the planar size of the covering member opening 42E. In other words, the planar size of the covering member opening 42E is preferably smaller than the planar size of the substrate opening 12E. With this configuration, the area in which the covering member 40E functions appropriately as a protective member for the stretchable device 100E from the outside can be made as large as possible. Furthermore, the risk of breakage of the contour portion of the covering member opening 42E can be further reduced, and the stretchability of the stretchable substrate itself can be suitably improved.

[0059] Although not particularly limited, the covering member 40E may be formed from a stretchable resin material, such as a polyester resin, a styrene resin, an olefin resin, an epoxy resin, a urethane resin, an acrylic resin, or a silicone resin, for example, a urethane resin.

[0060] However, without being limited to this, the base opening 12E itself may be covered with the covering member 40E.

[0061] Both the covering member opening 42E of the covering member 40E and the base material opening 12E of the stretchable base material can expand and contract depending on the opening configuration. Therefore, when both are exposed to the outside, depending on the planar size of both openings, the covering member opening 42E side may expand and contract excessively, which may cause breakage of the outline portion of the covering member opening 42E. In other words, it may cause breakage of the covering member 40E.

[0062] In this regard, while the former covering member opening 42E is open, the latter base material opening 12E can be covered by the continuous portion 41E of the covering member 40E, which makes it possible to suitably prevent excessive expansion and contraction of the covering member opening 42E side, which would otherwise cause breakage of the outline portion of the covering member opening 42E.

[0063] Seventh Embodiment Hereinafter, a seventh embodiment will be described. Fig. 7 is a plan view schematically showing a stretchable device according to a seventh embodiment of the present disclosure.

[0064] The seventh embodiment differs from the sixth embodiment in that a penetration region 50F is formed in the formation region of the covering member opening 42F.

[0065] Specifically, the through region 50F can be configured to penetrate from the cover member opening 42F side to the stretchable substrate side along the thickness direction of the stretchable substrate.

[0066] This makes it possible to alleviate stress on the covering member opening 42F when the stretchable device 100F stretches and contracts, compared to when the electrode section 30F, the stretchable wiring 20F, or the stretchable substrate is continuous without having a through region directly below the covering member opening 42E as shown in the drawing, for example. As a result, it is possible to further prevent the outline portion of the covering member opening 42F from breaking.

[0067] Eighth Embodiment An eighth embodiment will now be described. Fig. 8 is a plan view schematically showing a stretchable device according to an eighth embodiment of the present disclosure.

[0068] The eighth embodiment differs from the first embodiment in that a plurality of first elastic wirings 21GX, 21GY and a plurality of second elastic wirings 22GX, 22GY are arranged on either side of the substrate opening 12G.

[0069] With this arrangement, an elastic wire is arranged on each side of the substrate opening 12G, similar to the case in the first embodiment where one first elastic wire 21 and one second elastic wire 22 are arranged on either side of the substrate opening 12, thereby reducing the difference in stress that may occur on each side of the substrate opening 12G.

[0070] This makes it possible to suppress stress concentration and uneven distribution of stress, thereby reducing the risk of breakage at the location where stress occurs within the device.

[0071] Ninth Embodiment A ninth embodiment will now be described. Fig. 9 is a plan view schematically showing a stretchable device according to a ninth embodiment of the present disclosure.

[0072] The ninth embodiment differs from the first and eighth embodiments in that a plurality of first elastic wirings 21HX, 21HY and one second elastic wiring 22H are arranged on either side of the substrate opening 12F.

[0073] With this arrangement, similar to the case in the first embodiment where one first elastic wiring 21 and one second elastic wiring 22 are arranged on either side of the substrate opening 12, elastic wiring is arranged on each side of the substrate opening 12H, thereby reducing the difference in stress that may occur on each side of the substrate opening 12H.

[0074] In particular, if the total width, particularly the total volume, of the elastic wirings arranged on each side of the substrate opening 12H is the same, even though the number differs, the above-mentioned effect can be more suitably achieved.

[0075] Each embodiment and modification is an example, and the present disclosure is not limited to each embodiment and modification. Also, each drawing is an example of components and does not limit the shape. Furthermore, partial substitution or combination of the configurations shown in different embodiments and modifications is possible.

[0076] The aspects of the stretchable device of the present disclosure are as follows. <1> A stretchable device comprising a stretchable substrate and a plurality of stretchable wirings provided on the stretchable substrate, wherein the stretchable substrate has a substrate opening that is open on at least one main surface side, wherein the plurality of stretchable wirings include a first stretchable wiring and a second stretchable wiring, and wherein the first stretchable wiring and the second stretchable wiring are spaced apart and face each other with the substrate opening between them. <2> The stretchable device according to <1>, wherein the first stretchable wiring and the second stretchable wiring are electrically connectable. <3> The stretchable device according to <1> or <2>, further comprising an electrode unit provided on the stretchable substrate, wherein the first stretchable wiring and the second stretchable wiring are continuous with each other via the electrode unit. <4> The stretchable device according to any of <1> to <3>, wherein one of the first stretchable wiring and the second stretchable wiring is a dummy wiring that is not electrically connected to the other stretchable wiring. <5> The stretchable device according to <4>, further comprising an electrode section provided on the stretchable substrate, wherein one of the first stretchable wiring and the second stretchable wiring is continuous with the electrode section, and the other is not continuous with the electrode section. <6> The stretchable device according to any one of <1> to <5>, wherein the arrangement of the first stretchable wiring and the second stretchable wiring is line-symmetrical with respect to the substrate opening. <7> The stretchable device according to any one of <1> to <6>, wherein a plurality of the substrate openings are arranged at predetermined intervals in the stretching direction. <8> The stretchable device according to <7>, comprising the substrate openings having mutually different planar sizes. <9> The stretchable device according to <7>, comprising the substrate openings having mutually the same planar sizes. <10> The stretchable device according to any one of <7> to <9>, comprising the substrate openings having the same planar shape. <11> The stretchable device according to any one of <1> to <10>, further comprising a covering member that covers the stretchable substrate, and the first stretchable wire and the second stretchable wire, wherein the covering member has a covering member opening. <12> The stretchable device according to <11>, further comprising an electrode unit provided on the stretchable substrate, wherein the covering member opening and the electrode unit overlap each other so that a part of the electrode unit is exposed.<13> The stretchable device according to <11> or <12>, wherein a planar size of the substrate opening is larger than a planar size of the covering member opening. <14> The stretchable device according to any one of <11> to <13>, further comprising an electrode part provided on the stretchable substrate, wherein a through region is formed that penetrates along a thickness direction of the stretchable substrate from the covering member opening side to the stretchable substrate side. <15> The stretchable device according to any one of <1> to <14>, wherein the substrate opening is an opening that penetrates along a thickness direction of the stretchable substrate.

[0077] 100 to 100H Stretchable device 50F Penetration region formed in formation region of covering member opening 40E, 40F Covering member 41E, 41F Continuous portion of covering member 42E, 42F Covering member opening of covering member 30A to 30F Electrode portion 20, 20A to 20F Stretchable wire 21, 21A to 21F, 21GX, 21GY, 21HX, 21HY First stretchable wire 22, 22A to 22F, 22GX, 22GY, 22H Second stretchable wire 23 Central (central) axis in longitudinal direction of first stretchable wire 10, 10A to 10H Stretchable substrate 11 Main surface of stretchable substrate 12, 12A to 12H Substrate opening 12D1 First substrate opening 12D2 Second substrate opening 13 Outer edge of substrate opening d: Main stretch direction of the stretchable substrate L1: Shortest distance between the longitudinal central axis of the first stretchable wire and the outer edge of the substrate opening L2: Shortest distance between the longitudinal central axis of the second stretchable wire and the outer edge of the substrate opening

Claims

1. A stretchable device comprising a stretchable substrate and a plurality of stretchable wirings provided on the stretchable substrate, wherein the stretchable substrate has a substrate opening that is open on at least one main surface side, the plurality of stretchable wirings include a first stretchable wiring and a second stretchable wiring, and the first stretchable wiring and the second stretchable wiring are spaced apart and face each other across the substrate opening.

2. The stretchable device according to claim 1, wherein the first stretchable wiring and the second stretchable wiring are electrically connectable.

3. The stretchable device according to claim 1 or 2, further comprising an electrode portion provided on the stretchable substrate, wherein the first stretchable wiring and the second stretchable wiring are continuous with each other via the electrode portion.

4. A stretchable device described in any one of claims 1 to 3, wherein one of the first stretchable wiring and the second stretchable wiring is a dummy wiring that is not electrically connected to the other stretchable wiring.

5. The stretchable device according to claim 4, further comprising an electrode section provided on the stretchable substrate, wherein one of the first stretchable wiring and the second stretchable wiring is continuous with the electrode section, and the other is not continuous with the electrode section.

6. A stretchable device according to any one of claims 1 to 5, wherein the first stretchable wiring and the second stretchable wiring are arranged in line symmetry with the opening of the substrate in between.

7. The stretchable device according to any one of claims 1 to 6, wherein a plurality of the substrate openings are arranged at predetermined intervals in the stretching direction.

8. The stretchable device of claim 7, comprising the substrate openings having mutually different planar sizes.

9. The stretchable device of claim 7, comprising the substrate openings having the same planar sizes as each other.

10. The stretchable device according to any one of claims 7 to 9, comprising the substrate openings having the same planar shape.

11. The stretchable device according to any one of claims 1 to 10, further comprising a covering member that covers the stretchable substrate and the first stretchable wiring and the second stretchable wiring, the covering member having a covering member opening.

12. The stretchable device according to claim 11, further comprising an electrode portion provided on the stretchable substrate, wherein the covering member opening and the electrode portion overlap each other so that a portion of the electrode portion is exposed.

13. The stretchable device according to claim 11 or 12, wherein the planar size of the opening of the substrate is larger than the planar size of the opening of the covering member.

14. The stretchable device according to any one of claims 11 to 13, further comprising an electrode section provided on the stretchable substrate, wherein a penetration region is formed that penetrates the stretchable substrate in the thickness direction from the opening side of the covering member to the stretchable substrate side.

15. The stretchable device according to any one of claims 1 to 14, wherein the substrate opening is an opening that penetrates the stretchable substrate along the thickness direction.

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