Stretchable device

Abstract

An embodiment according to the present disclosure provides a stretchable device comprising: a wiring board provided with a stretchable base material and first stretchable wiring, which is provided on a first main surface of the stretchable base material; and an electronic circuit board provided with a base material, second wiring, which is provided on a second main surface of the base material facing the first main surface of the stretchable base material and can be electrically connected to the first stretchable wiring, and a mounted component, which is provided on the second wiring. The wiring board has a space region which is open on the side where the first stretchable wiring is disposed and in which the mounted component of the electronic circuit board can be accommodated.

Description

stretchable devices

[0001] The present disclosure relates to stretchable devices.

[0002] In the past, a bioelectrode (corresponding to a wiring board) and an electronic circuit board have been arranged so as to overlap in the thickness direction of the substrate. In this case, both the wiring board and the electronic circuit board comprise a substrate and wiring provided on the main surface of the substrate. In addition to the substrate and wiring, the electronic circuit board may further comprise electronic components provided on the wiring.

[0003] Patent No. 6718183

[0004] In the above-mentioned conventional embodiment, the wiring board and the electronic circuit board are arranged so as to overlap each other in the thickness direction of the base material. When such a structure is applied to a stretchable device including a wiring board having a stretchable wiring, depending on the arrangement position of the electronic components of the electronic circuit board in the overlapping region, there is a risk that the stretchable wiring of the wiring board will be broken by the electronic components.

[0005] Therefore, an object of the present disclosure is to provide a stretchable device that can suitably suppress breakage of a stretchable wiring in a wiring board.

[0006] In order to achieve the above object, in one embodiment of the present disclosure, there is provided a stretchable device comprising: a wiring board including a stretchable substrate and a first stretchable wiring provided on a first main surface of the stretchable substrate; and an electronic circuit board including a substrate and a second wiring provided on a second main surface of the substrate opposite to the first main surface of the stretchable substrate and electrically connectable to the first stretchable wiring, and a mounted component provided on the second wiring, wherein the wiring board is open from the side where the first stretchable wiring is arranged, and has a spatial region capable of accommodating the mounted component of the electronic circuit board.

[0007] According to the stretchable device according to an embodiment of the present disclosure, breakage of the stretchable wiring in the wiring substrate can be suitably suppressed.

[0008] Fig. 1 is an exploded cross-sectional view schematically showing a stretchable device according to a first embodiment of the present disclosure. Fig. 2 is a cross-sectional view (corresponding to Fig. 1 ) schematically showing a stretchable device according to the first embodiment of the present disclosure. Fig. 3 is a cross-sectional view schematically showing a stretchable device according to a second embodiment of the present disclosure. Fig. 4 is a cross-sectional view schematically showing a stretchable device according to a third embodiment of the present disclosure. Fig. 5 is a cross-sectional view schematically showing a stretchable device according to a fourth embodiment of the present disclosure. Fig. 6 is a cross-sectional view schematically showing a stretchable device according to a fifth embodiment of the present disclosure. Fig. 7 is a cross-sectional view schematically showing a stretchable device according to a sixth embodiment of the present disclosure. Fig. 8 is a cross-sectional view schematically showing a stretchable device according to a seventh embodiment of the present disclosure.

[0009] 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.

[0010] First Embodiment Hereinafter, the configuration of a stretchable device 1000 according to a first embodiment will be described with reference to FIGS. 1 and 2. FIG.

[0011] Fig. 1 is an exploded cross-sectional view schematically showing a stretchable device according to a first embodiment of the present disclosure. Fig. 2 is a cross-sectional view (corresponding to Fig. 1) schematically showing a stretchable device according to a first embodiment of the present disclosure. In the cross-sectional views in this specification, the thickness direction of a stretchable substrate, which will be described later, is indicated by a double-headed arrow X.

[0012] The stretchable device 1000 according to the first embodiment of the present disclosure includes a wiring board 100 and an electronic circuit board 200. The wiring board 100 includes a stretchable substrate 110 and a first stretchable wiring 120 provided on a first main surface 111 of the stretchable substrate 110. Because the wiring board 100 has stretchable wiring, the wiring board 100 as a whole can be referred to as a stretchable wiring board. Furthermore, the wiring board 100 and the electronic circuit board 200 can be arranged so as to overlap each other in the thickness direction of the wiring board 100 and the electronic circuit board 200.

[0013] The electronic circuit board 200 comprises a base material 210, a second elastic wiring 220 provided on the second main surface 211 of the base material 210 and capable of being electrically connected to the first elastic wiring 120, and a mounting component 230 provided on the second elastic wiring 220.

[0014] In this embodiment, the wiring of the components of the electronic circuit board 200 is premised on being a stretchable wiring (corresponding to the second stretchable wiring 220), but is not limited to this and may be a wiring that does not have stretchability. For the reasons described above, in this specification, the above-mentioned second stretchable wiring that has stretchability and wiring that does not have stretchability are collectively referred to as "second wiring".

[0015] In the first embodiment, the base material 210 may be a base material having the same stretchability as the stretchable base material 110 of the wiring board 100. The second main surface 211 of the base material 210 is a main surface on the side opposite to the first main surface 111 of the stretchable base material 110 of the wiring board 100.

[0016] 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 the main surface of a stretchable substrate" can include a stretchable wiring in contact with the main surface of the stretchable substrate, and a stretchable wiring that is not in direct contact with the main surface of the stretchable substrate and is separated from the main surface via another member (for example, a resin layer).

[0017] The main components of the stretchable device 1000 according to the first embodiment will be described below. After describing each component, the characteristic parts of the first embodiment will be described.

[0018] (Stretchable substrate) The stretchable substrate 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.

[0019] (First and second elastic wires 120, 220) The first and second elastic wires 120, 220 contain conductive particles and a resin. Examples of the first and second elastic wires 120, 220 include a mixture of metal powder such as Ag, Cu, or Ni as conductive particles 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. In addition, the conductive particles are preferably spherical in shape.

[0020] The thickness of the first and second elastic wires 120, 220 is not particularly limited, but is preferably 100 μm or less, and more preferably 50 μm or less. Furthermore, the thickness of the first and second elastic wires 120, 220 is preferably 0.01 μm or more. The line width of the first and second elastic wires 120, 220 is not particularly limited, but is preferably 0.1 μm or more, and more preferably 10 mm or less. The shape and number of the first and second elastic wires 120, 220 are not particularly limited.

[0021] (Mounted Components) Examples of mounted components 230 include passive components such as capacitors, resistors, and inductors, as well as active components such as amplifiers that amplify electrical signals and / or reduce noise, and rectifiers that rectify electrical signals.

[0022] In the above configuration, the first embodiment is characterized in that the wiring board 100 has an opening on the side where the first elastic wiring 120 is arranged, and has a spatial region 130 that can accommodate the mounted components 230 of the electronic circuit board 200.

[0023] According to this feature, the mounted component 230 can be accommodated in the spatial region 130 of the wiring board 100, and therefore the mounted component 230 can be positioned in this spatial region 130 in the thickness direction of the wiring board 100. In other words, the spatial region 130 can face the mounted component 230.

[0024] Furthermore, in the thickness direction of the wiring board 100, the mounting component 230 may have the same thickness as the wiring board 100, or may be thicker or thinner than the wiring board 100. In other words, in the thickness direction of the wiring board 100, the first elastic wiring 120 and the elastic base material 110 do not face the mounting component 230.

[0025] As a result, when the wiring board 100 and the electronic circuit board 200 are arranged so as to overlap in the thickness direction of the base material, it is possible to achieve electrical connection between the first elastic wiring 120 and the second elastic wiring 220 while avoiding the mounted component 230 from coming into contact with the first elastic wiring 120 of the wiring board 100.

[0026] This makes it possible to suitably prevent the first elastic wiring 120 in the wiring board 100 from being broken by the mounted component 230 when the wiring board 100 and the electronic circuit board 200 are arranged so as to overlap in the thickness direction of the base material and the first elastic wiring 120 and the second elastic wiring 220 are in a state in which they can be electrically connected.

[0027] In the first embodiment, the spatial region 130 may be a through-hole extending in the thickness direction of the substrate. When the spatial region 130 is a through-hole extending in the thickness direction of the substrate, the maximum diameter of the through-hole may be 100 μm or more and 20 mm or less from the viewpoint of processing accuracy. The planar shape of the through-hole may be, for example, a perfect circle, an ellipse, a polygon, or the like.

[0028] The first elastic wire 120 and the second elastic wire 220 can be connected in a contacting state by, for example, thermocompression bonding, etc. Note that the first elastic wire 120 and the second elastic wire 220 only need to be electrically connected, and may be in contact via, for example, an ACF or the like.

[0029] 1 and 2, in a cross-sectional view, the second elastic wires 220 can be arranged separately from each other via the mounting component 230. Furthermore, the first elastic wires 120 can be arranged separately from each other. For example, one second elastic wire 220 can be connected to an input terminal of the mounting component 230, and the other second elastic wire 220 can be connected to an output terminal of the mounting component 230. Then, one first elastic wire 120 and one second elastic wire 220 can be connected. Furthermore, the other first elastic wire 120 and the other second elastic wire 220 can be connected.

[0030] Without being limited to this, one second elastic wire 220 and the other second elastic wire 220 may be continuous in the depth direction of the drawing.

[0031] The spatial region 130 is preferably disposed in the center of the stretchable substrate 110. According to this arrangement, the electronic circuit board 200 including the mounted components 230 housed in the spatial region 130 can be positioned on the center side of the stretchable substrate 110.

[0032] This allows the connection point of the electronic circuit board 200 to the wiring board 100 to be positioned on the central side of the stretchable substrate 110. As a result, compared to when this connection point is positioned on the end or peripheral edge (rather than the central part) of the stretchable substrate 110, breakage of the first stretchable wiring 120 (and the stretchable substrate 110) due to stress concentration can be more suitably suppressed.

[0033] Furthermore, by covering the mounting component 230 with a protective layer such as potting or a cover from the main surface of the stretchable substrate 110 on which the first stretchable wiring 120 is not arranged, it is possible to suitably protect the mounting component 230 from external forces.

[0034] The stretchable device of the present disclosure can be manufactured by stacking the wiring board 100 and the electronic circuit board 200 in the thickness direction of the base material.

[0035] Specifically, for the wiring board 100, the spatial region 130 can be formed at least partially from the main surface on which the first elastic wiring 120 is to be installed to the opposite main surface at a predetermined location of the elastic substrate 110 by punching using a Pinnacle (registered trademark) blade, laser processing, or the like. In one example, the first elastic wiring 120 may be formed at a predetermined interval on the main surface of the elastic substrate 110 so that the location where the spatial region 130 is to be formed is removed in advance in a cross-sectional view. In another example, the first elastic wiring 120 may be formed on the main surface of the elastic substrate 110, and then the elastic substrate 110 and the first elastic wiring 120 may be integrally processed to form the spatial region 130.

[0036] Furthermore, for the electronic circuit board 200, second elastic wires 220 are provided at predetermined intervals in predetermined locations (on the main surface facing the first elastic wire 120) of the base material 210. Thereafter, a mounting component 230 is provided on this second elastic wire 220.

[0037] Thereafter, the first stretchable wiring 120 and the second stretchable wiring 220 are joined directly or indirectly in the thickness direction of the base material, and the mounted component 230 of the electronic circuit board 200 is inserted into the spatial region 130 of the wiring board 100 formed above. In this manner, the stretchable device 1000 of the present disclosure can be manufactured.

[0038] Other embodiments including the second embodiment will be described below, focusing mainly on the differences from the first embodiment.

[0039] Second Embodiment Hereinafter, a second embodiment will be described. Fig. 3 is a cross-sectional view schematically showing a stretchable device according to a second embodiment of the present disclosure.

[0040] The second embodiment differs from the first embodiment in that the spatial region 130A in cross section is a recessed region rather than a through-hole extending in the thickness direction of the base material.

[0041] In this case, since the mounting component 230A can be accommodated in the recessed region (corresponding to the spatial region 130A) of the wiring board 100A, the spatial region 130A can face the mounting component 230A in the thickness direction of the wiring board 100A. In the thickness direction of the wiring board, the mounting component 230A is not thicker than the wiring board 100A. In other words, in the second embodiment, the first elastic wiring 120A and the mounting component 230A do not face each other in the thickness direction of the wiring board 100A. On the other hand, unlike the first embodiment, the elastic base material 110A and the mounting component 230A can face each other in the thickness direction of the wiring board 100A.

[0042] As described above, when the wiring board 100A and the electronic circuit board 200A are arranged so as to overlap in the thickness direction of the base material, it is possible to prevent the mounting component 230A from coming into contact with the first elastic wiring 120A of the wiring board 100A while achieving electrical connection between the first elastic wiring 120A and the second elastic wiring 220A. This makes it possible to suppress breakage of the first elastic wiring 120A of the wiring board 100A by the mounting component 230A when the first elastic wiring 120A and the second elastic wiring 220 are in a state where they can be electrically connected.

[0043] Furthermore, in the second embodiment, as described above, the elastic substrate 110A and the mounted component 230A are positioned opposite each other in the thickness direction of the wiring board 100A, and therefore the wiring board 100A can have the effect of protecting the mounted component 230A from external forces.

[0044] Third Embodiment Hereinafter, a third embodiment will be described. Fig. 4 is a cross-sectional view schematically showing a stretchable device according to a third embodiment of the present disclosure.

[0045] The third embodiment differs from the first embodiment in that, in a cross-sectional view, an electrode 300B is provided on a first elastic wire 120B in a wiring substrate 100B.

[0046] Specifically, in the thickness direction X of the wiring board 100B, the first elastic wire 120B has an overlapping region 121B that overlaps with the electronic circuit board 200B and a non-overlapping region 122B that does not overlap with the electronic circuit board 200B. In this case, the electrode 300B can be positioned on the non-overlapping region 122B of the first elastic wire 120B.

[0047] In this embodiment, the electrode 300B is a conductive member that can come into contact with a living body, specifically the skin of the living body, and can receive electrical signals from the living body. This contact allows the electrode 300B to receive electrical signals (equivalent to biosignals) related to the body's internal information (e.g., brain waves and electrocardiograms in humans and animals). In contrast, the mounted component 230B can be placed on the electronic circuit board 200B so as not to come into contact with the living body.

[0048] To explain the behavior of the received electrical signal, after receiving the above electrical signal, the electrical signal passes through one of the first elastic wires 120B and one of the second elastic wires 220B and enters the mounted component 230B, where it undergoes predetermined electrical processing (signal amplification, noise removal, etc.).

[0049] Thereafter, the electrically processed electrical signal comes out of the mounting component 230B, passes through the other second elastic wire 220B and the other first elastic wire 120B, and can finally be suitably measured as an external signal.

[0050] Alternatively, without being limited to this, the received electrical signal may be measured directly as an external signal without passing through the mounted component 230B.

[0051] Fourth Embodiment A fourth embodiment will now be described. Fig. 5 is a cross-sectional view schematically illustrating a stretchable device according to a fourth embodiment of the present disclosure.

[0052] The fourth embodiment differs from the first or third embodiment described above in that, when viewed in cross section (thickness direction of the substrate), the exposed portion of the first elastic wiring 120C in the non-overlapping region 121C that does not overlap with the electronic circuit board 200C is covered with an insulating member 400C.

[0053] According to this feature, compared to an embodiment (corresponding to the above-described third embodiment) in which an electrode is simply provided in a non-overlapping region of the first stretchable wire, the portion of the main surface 123C of the first stretchable wire 120C that does not overlap with the electrode 300C and the second stretchable wire 220C can be covered as a whole by the insulating member 400C. This makes it possible to suppress external exposure of the main surface of the first stretchable wire 120C. As a result, it is possible to suppress the entry of electrical signals into the first stretchable wire 120C from sources other than the electrode 300C, and the entry of noise into electrical signals transmitted within the first stretchable wire 120C. In other words, it is possible to suppress the superposition of noise on electrical signals when the stretchable device 1000C is attached to a living body.

[0054] In this case, from the viewpoint of more suitably suppressing external exposure of the main surface of the first elastic wiring 120C, it is preferable that an insulating member 400C is arranged between the electrode 300C and the electronic circuit board 200C so as to be in contact with the electrode 300C and the electronic circuit board 200C.

[0055] The above assumes the placement of electrode 300C, but is not limited to this, and even if electrode 300C is not placed, the portion of the main surface 123C of the first elastic wiring 120C that does not overlap with the second elastic wiring 220C can be covered as a whole by the insulating member 400C.

[0056] Fifth Embodiment A fifth embodiment will now be described. Fig. 6 is a cross-sectional view schematically illustrating a stretchable device according to a fifth embodiment of the present disclosure.

[0057] The fifth embodiment differs from the first embodiment in that an insulating member 500D is provided in a region on a second elastic wire 220D between a mounting component 230D and a first elastic wire 120D. This configuration is based on the premise that the width dimension W2 of the spatial region 130D is larger than the width dimension W1 of the mounting component when viewed in the thickness direction of the wiring board 100D.

[0058] According to this feature, the portion of the second main surface 221D of the second stretchable wire 220D that does not overlap with the mounting component 230D and the first stretchable wire 120D can be covered as a whole by the insulating member 500D. This makes it possible to suppress external exposure of the second main surface 221D of the second stretchable wire 220D. As a result, compared to a case in which the second stretchable wire 220D may be exposed in the absence of the insulating member 500D, it is possible to suppress external contact with the second stretchable wire 220D when the stretchable device is attached to a living body, and as a result, it is possible to suppress the introduction of noise into the electrical signal transmitted within the second stretchable wire 220D.

[0059] In this case, from the viewpoint of more suitably suppressing external exposure of the second main surface 221D of the second elastic wiring 220D, it is preferable that an insulating member 500D is arranged between the mounting component 230D and the first elastic wiring 120D so as to be in contact with the mounting component 230D and the first elastic wiring 120D.

[0060] Sixth Embodiment Hereinafter, a sixth embodiment will be described. Fig. 7 is a cross-sectional view schematically showing a stretchable device according to a sixth embodiment of the present disclosure.

[0061] The sixth embodiment differs from the first embodiment in that a first elastic wire 120E and a second elastic wire 220E are joined by a conductive adhesive 600E.

[0062] As described above, in the first embodiment, the first elastic wire 120 and the second elastic wire 220 can be connected in a contacting state by, for example, thermocompression bonding or the like. The electrical connection between the two is not limited to this method of thermocompression bonding or the like, and can be achieved by providing a conductive adhesive 600E between them. In other words, the conductive adhesive 600E can function as a connecting member or an intervening member for electrically connecting the first elastic wire 120E and the second elastic wire 220E.

[0063] Although not particularly limited, the conductive adhesive 600E may include a thermosetting epoxy resin and conductive particles contained in the resin.

[0064] Furthermore, as shown in the third embodiment, in an aspect further comprising an electrode, two or more electrodes may be arranged at a predetermined interval throughout the entire stretchable device. In this case, if an electrical signal is applied via the conductive adhesive in the surface direction of the substrate rather than in the thickness direction of the substrate, other electrodes located in other regions within the device may unnecessarily receive the electrical signal.

[0065] In order to avoid such a phenomenon, the conductive adhesive 600E is preferably an anisotropic conductive adhesive. In this case, the conductive adhesive 600E preferably has conductivity in the thickness direction of the base material (the direction in which the first elastic wire 120E and the second elastic wire 220E overlap each other) and has insulation in the surface direction.

[0066] Seventh Embodiment Hereinafter, a seventh embodiment will be described. Fig. 8 is a cross-sectional view schematically showing a stretchable device according to a seventh embodiment of the present disclosure.

[0067] The seventh embodiment differs from the first embodiment in that the substrate of the electronic circuit board 200F is a rigid or flexible substrate rather than an elastic substrate, in which case soldering can be used to mount components on the electronic circuit board 200F.

[0068] 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.

[0069] The aspects of the stretchable device of the present disclosure are as follows. <1> A stretchable device comprising: a wiring board including a stretchable substrate and a first stretchable wiring provided on a first main surface of the stretchable substrate; and an electronic circuit board including a substrate and a second wiring provided on a second main surface of the substrate opposite to the first main surface of the stretchable substrate and electrically connectable to the first stretchable wiring, and a mounted component provided on the second wiring, wherein the wiring board is open from the side where the first stretchable wiring is arranged and has a spatial region capable of accommodating the mounted component of the electronic circuit board. <2> The stretchable device according to <1>, wherein the mounted component is located in the spatial region in the thickness direction of the wiring board. <3> The stretchable device according to <1> or <2>, wherein at least the first stretchable wiring does not face the mounted component in the thickness direction of the wiring board. <4> The stretchable device according to any of <1> to <3>, wherein the spatial region is a through-hole. <5> The stretchable device according to any one of <1> to <3>, wherein the spatial region is a recessed region in a cross-sectional view. <6> The stretchable device according to any one of <1> to <5>, wherein, in a thickness direction of the base material, the first stretchable wiring has an overlapping region that overlaps with the electronic circuit board and a non-overlapping region that does not overlap with the electronic circuit board, and an electrode is provided on the non-overlapping region of the first stretchable wiring. <7> The stretchable device according to <6>, wherein the electrode is capable of contacting a living body. <8> The stretchable device according to any one of <1> to <7>, wherein the mounted component does not contact a living body. <9> The stretchable device according to any one of <1> to <8>, wherein, in a thickness direction of the base material, the first stretchable wiring has an overlapping region that overlaps with the electronic circuit board and a non-overlapping region that does not overlap with the electronic circuit board, and an exposed portion of the first stretchable wiring in the non-overlapping region is covered with an insulating member. <10> The stretchable device according to <9>, wherein the insulating member is provided between the electrode and the electronic circuit board so as to be in contact with the electrode and the electronic circuit board.<11> The stretchable device according to any one of <1> to <10>, wherein, when the width dimension of the spatial region is larger than the width dimension of the mounting component as viewed in the thickness direction of the wiring board, an insulating member is provided in a region on the second wiring between the mounting component and the first stretchable wiring. <12> The stretchable device according to <11>, wherein the insulating member is provided between the mounting component and the first stretchable wiring so as to be in contact with the mounting component and the first stretchable wiring. <13> The stretchable device according to any one of <1> to <12>, wherein the first stretchable wiring and the second wiring are joined by a conductive adhesive. <14> The stretchable device according to <13>, wherein the conductive adhesive is an anisotropic conductive adhesive, and the anisotropic conductive adhesive is capable of conducting electricity in the thickness direction of the stretchable device. <15> The stretchable device according to any one of <1> to <14>, wherein the substrate of the electronic circuit board is a stretchable substrate, a rigid substrate, or a flexible substrate. <16> The stretchable device according to any one of <1> to <15>, wherein the mounted component is an amplifier. <17> The stretchable device according to <7>, wherein the electrode is a conductive member capable of receiving an electrical signal from the living body. <18> The stretchable device according to any one of <1> to <17>, wherein the second wiring has stretchability.

[0070] 1000-1000F Stretchable device 600E Conductive adhesive 500D Insulating member 400C Insulating member 300B Electrode 200-200F Electronic circuit board 210-210E Substrate (stretchable substrate) 210F Rigid substrate or flexible substrate 211 Second main surface of substrate 220-220F Second stretchable wiring 230-230F Mounted component 100-100F Wiring board 110-110F Stretchable substrate 111 First main surface of stretchable substrate 120-120F First stretchable wiring 121B Overlapping region of first stretchable wiring that overlaps with electronic circuit board 122B Non-overlapping region of first stretchable wiring that does not overlap with electronic circuit board 130-130F Spatial region of wiring board X: thickness direction of substrate W1: width dimension of mounted component W2: Width dimension of the spatial region

Claims

1. A wiring board comprising a stretchable substrate and a first stretchable wiring provided on the first main surface of the stretchable substrate, and An electronic circuit board comprising a base material, a second wiring provided on the second main surface of the base material facing the first main surface of the stretchable base material and electrically connectable to the first stretchable wiring, and mounted components provided on the second wiring. Equipped with, The wiring board has an opening from the side where the first stretchable wiring is arranged and has a spatial region capable of accommodating the mounted components of the electronic circuit board. When viewed from the thickness direction of the wiring board, if the width dimension of the spatial region is greater than the width dimension of the mounted component, an insulating member is provided in the region between the mounted component and the first expandable wiring on the second wiring. A stretchable device in which the insulating member is provided between the mounted component and the first stretchable wiring so as to be in contact with the mounted component and the first stretchable wiring.

2. The expandable device according to claim 1, wherein the mounted component is located in the spatial region in the thickness direction of the wiring board.

3. The stretchable device according to claim 1, wherein at least the first stretchable wiring does not face the mounted component in the thickness direction of the wiring board.

4. The expandable device according to claim 1, wherein the spatial region is a through hole.

5. The expandable device according to claim 1, wherein, in a cross-sectional view, the spatial region is a recessed region.

6. The stretchable device according to claim 1, wherein in the thickness direction of the substrate, the first stretchable wiring has an overlapping region that overlaps with the electronic circuit board and a non-overlapping region that does not overlap with the electronic circuit board, and electrodes are provided on the non-overlapping region of the first stretchable wiring.

7. The stretchable device according to claim 6, wherein the electrode is capable of contacting a living organism.

8. The stretchable device according to claim 1, wherein the mounted components do not come into contact with living organisms.

9. The stretchable device according to claim 1, wherein in the thickness direction of the substrate, the first stretchable wiring has an overlapping region that overlaps with the electronic circuit board and a non-overlapping region that does not overlap with the electronic circuit board, and the exposed portion of the first stretchable wiring in the non-overlapping region is covered with an insulating member.

10. The expandable device according to claim 9, wherein the insulating member is provided between the electrode and the electronic circuit board so as to be in contact with the electrode and the electronic circuit board.

11. The stretchable device according to claim 1, wherein the first stretchable wiring and the second wiring are joined together by a conductive adhesive.

12. The stretchable device according to claim 11, wherein the conductive adhesive is an anisotropic conductive adhesive, and the anisotropic conductive adhesive is conductive in the thickness direction of the stretchable device.

13. The stretchable device according to claim 1, wherein the substrate of the electronic circuit board is a stretchable substrate, a rigid substrate, or a flexible substrate.

14. The expandable device according to claim 1, wherein the mounted component is an amplifier.

15. The expandable device according to claim 7, wherein the electrode is a conductive member capable of receiving electrical signals from the living organism.

16. The stretchable device according to claim 1, wherein the second wiring is stretchable.