Conductive member for touch panel, touch panel, touch panel display device, and method for manufacturing conductive member for touch panel

Abstract

The present application provides a kind of conductive component for touch panel, touch panel and touch panel display device, although using flexible substrate, but also can inhibit the peeling of connecting terminal part.The conductive component for touch panel has flexible substrate, first conductive layer arranged on flexible substrate, insulating layer arranged on first conductive layer, and second conductive layer arranged on insulating layer and first conductive layer, first conductive layer has anchor electrode part, second conductive layer has first connecting terminal part covering anchor electrode part, the length of the component orthogonal to the outline of the shape pattern of the anchor electrode part of the part covered by first connecting terminal part is the length of the component parallel to the specified direction, and the total value Y1 is the total value X1.

Description

Technical Field

[0001] The present invention relates to conductive components for touch panels used as electrodes for detecting touch operations.

[0002] In addition, the present invention also relates to a touch panel including conductive components for a touch panel.

[0003] In addition, the present invention also relates to a touch panel display device including a touch panel.

[0004] Furthermore, the present invention also relates to a method for manufacturing conductive components for touch panels. Background Technology

[0005] For a long time, various electronic devices, such as tablet computers and smartphones, have used touch panel display devices that allow input operations to be performed by touching or approaching the screen with fingers, pens, or other means.

[0006] Such a touch panel display device has a conductive component with a detection section for detecting touch operations.

[0007] The detection section is sometimes formed of transparent conductive oxides such as ITO (Indium Tin Oxide), but in addition to transparent conductive oxides, it can also be formed of opaque conductive materials such as metals. Compared with the aforementioned transparent conductive oxides, opaque conductive materials such as metals have advantages such as ease of pattern formation, excellent flexibility, and lower resistance.

[0008] For example, Patent Document 1 describes a conductive component in which a first electrode layer is stacked on one side of a glass substrate, an insulating layer is stacked on the first electrode layer, and a second electrode layer is stacked on the insulating layer. The first electrode layer has a detection electrode portion for detecting touch operations, lead-out wiring extending from the detection electrode portion, and an anchoring electrode portion connected to the lead-out wiring and electrically connected to an external circuit. For electrical connection to the external circuit, the anchoring electrode portion has one end exposed from the insulating layer relative to the end connected to the lead-out wiring, and a conductive connection terminal portion is disposed on the anchoring electrode portion. This prevents damage to the anchoring electrode portion during the manufacturing process.

[0009] Previous technical documents

[0010] Patent documents

[0011] Patent Document 1: Description of Chinese Patent Application Publication No. 110794992 Summary of the Invention

[0012] The technical problem to be solved by the invention

[0013] In Patent Document 1, a glass substrate was used. However, to improve the convenience of conductive components, it is sometimes desirable to use a flexible substrate formed of resin or the like instead of a glass substrate. However, if a flexible substrate is used, when the flexible substrate is bent, the stress acting on the interface between the anchor electrode portion and the connecting terminal portion can cause the connecting terminal portion to easily peel off from the anchor electrode portion.

[0014] The present invention was made to solve these previous problems, and its purpose is to provide a conductive component for a touch panel that can suppress peeling of the connection terminal portion even though a flexible substrate is used.

[0015] In addition, the present invention aims to provide a touch panel including the conductive component for the touch panel.

[0016] In addition, the present invention aims to provide a touch panel display device including the touch panel.

[0017] Furthermore, an object of the present invention is to provide a method for manufacturing a conductive component for a touch panel.

[0018] means for solving technical problems

[0019] The conductive component for a touch panel according to the first invention is characterized by comprising: a flexible substrate; a first conductive layer disposed on one surface of the flexible substrate; an insulating layer disposed on the first conductive layer; and a second conductive layer disposed on the insulating layer and the first conductive layer. The flexible substrate, viewed from above, has a visual recognition area, a peripheral wiring area located outside the visual recognition area, and a connecting wiring area located outside the peripheral wiring area in a predetermined direction. The first conductive layer comprises: a first detection electrode portion disposed in the visual recognition area; a first lead-out wiring portion disposed in the peripheral wiring area and electrically connected to the first detection electrode portion; and an anchoring electrode portion disposed in the connecting wiring area and electrically connected to the first lead-out wiring portion. The second conductive layer comprises: a second detection electrode portion disposed in the visual recognition area. The area includes: a second lead-out wiring portion disposed in the peripheral wiring area and electrically connected to a second detection electrode portion; a second connection terminal portion disposed in the connection wiring area and electrically connected to the second lead-out wiring portion; and a first connection terminal portion disposed in the connection wiring area, electrically insulated from the second lead-out wiring portion and covered with an anchor electrode portion and electrically connected to the anchor electrode portion. The anchor electrode portion forms a shape pattern that is partially exposed on the surface of the flexible substrate in plan view and has at least a portion of exposed area that is not covered by an insulating layer. The first connection terminal portion is covered with the anchor electrode portion in the exposed area and electrically connected to the anchor electrode portion. The total length Y1 of the components of the outline of the shape pattern of the anchor electrode portion in the portion covered by the first connection terminal portion is greater than or equal to the total length X1 of the components parallel to the predetermined direction.

[0020] The conductive component for a touch panel according to the second invention is characterized by comprising: a flexible substrate; a first conductive layer disposed on one surface of the flexible substrate; an insulating layer disposed on the first conductive layer; and a second conductive layer disposed on the insulating layer and the first conductive layer. The flexible substrate, when viewed from above, has a visual recognition area, a peripheral wiring area located outside the visual recognition area, and a connecting wiring area located outside the peripheral wiring area in a predetermined direction. The first conductive layer comprises: a first detection electrode portion disposed in the visual recognition area; a first lead-out wiring portion disposed in the peripheral wiring area and electrically connected to the first detection electrode portion; and an anchoring electrode portion disposed in the connecting wiring area and at least a portion electrically connected to the first lead-out wiring portion. The second conductive layer comprises: a first detection electrode portion disposed in the visual recognition area; a first lead-out wiring portion disposed in the peripheral wiring area and electrically connected to the first lead-out wiring portion; and an anchoring electrode portion disposed in the connecting wiring area and at least a portion electrically connected to the first lead-out wiring portion. The layer has: a second detection electrode portion disposed in a visual recognition area; a second lead-out wiring portion disposed in a peripheral wiring area and electrically connected to the second detection electrode portion; a second connection terminal portion disposed in a connection wiring area and electrically connected to the second lead-out wiring portion; and a first connection terminal portion disposed in the connection wiring area, electrically insulated from the second lead-out wiring portion and covered with an anchoring electrode portion and electrically connected to the anchoring electrode portion, the anchoring electrode portion including a connection anchor portion connected to the first lead-out wiring portion and an independent anchor portion disposed at a distance from the connection anchor portion in a predetermined direction, and having at least a portion of the connection anchor portion and an exposed area of ​​the independent anchor portion not covered by an insulating layer, the first connection terminal portion being covered with the anchoring electrode portion in the exposed area and electrically connected to the anchoring electrode portion.

[0021] The independent anchoring part can have multiple unit anchoring parts arranged at intervals between each other.

[0022] Preferably, when viewed from above, the ratio of the area of ​​the anchor electrode portion in the exposed area to the area of ​​the first connection terminal portion in the exposed area is 50% or less.

[0023] The first conductive layer and the second conductive layer can be formed from the same metallic material.

[0024] The touch panel of the present invention is characterized by comprising: the above-described conductive component for touch panel; a circuit board electrically connected to the first connection terminal portion and the second connection terminal portion; and a cover component disposed on the second conductive layer via an adhesive.

[0025] The touch panel display device of the present invention is characterized in that it comprises: the touch panel described above; and a display module having a display surface and the display surface being bonded to another surface of a flexible substrate by an adhesive.

[0026] The circuit board can also be folded back in such a way that one end is connected to the first connection terminal and the second connection terminal, and the other end is facing the opposite side of the display surface of the display module.

[0027] The wiring area can also be folded back with its ends facing the opposite side of the display surface of the display module.

[0028] The method for manufacturing a conductive component for a touch panel according to the first invention is characterized by comprising: a first step of forming a first conductive layer on a surface of a flexible substrate; a second step of forming an insulating layer on the first conductive layer; and a third step of forming a second conductive layer on the insulating layer and the first conductive layer. The flexible substrate, viewed from above, has a visual recognition area, a peripheral wiring area located outside the visual recognition area, and a connecting wiring area located outside the peripheral wiring area in a predetermined direction. The first conductive layer comprises: a first detection electrode portion disposed in the visual recognition area; a first lead-out wiring portion disposed in the peripheral wiring area and electrically connected to the first detection electrode portion; and an anchoring electrode portion disposed in the connecting wiring area and electrically connected to the first lead-out wiring portion. The second conductive layer comprises: a second detection electrode portion disposed in the visual recognition area. The device comprises: a detection area; a second lead-out wiring portion disposed in the peripheral wiring area and electrically connected to a second detection electrode portion; a second connection terminal portion disposed in the connection wiring area and electrically connected to the second lead-out wiring portion; and a first connection terminal portion disposed in the connection wiring area, electrically insulated from the second lead-out wiring portion and covered with an anchor electrode portion and electrically connected to the anchor electrode portion. The anchor electrode portion forms a shape pattern partially exposed on the surface of the flexible substrate in plan view and has at least a portion of exposed area not covered by an insulating layer. The first connection terminal portion is covered with the anchor electrode portion in the exposed area and electrically connected to the anchor electrode portion. The total length Y1 of the components orthogonal to a predetermined direction of the outline of the shape pattern of the anchor electrode portion in the portion covered by the first connection terminal portion is greater than or equal to the total length X1 of the components parallel to the predetermined direction.

[0029] The method for manufacturing a conductive component for a touch panel according to the second invention is characterized by comprising: a first step of forming a first conductive layer on a surface of a flexible substrate; a second step of forming an insulating layer on the first conductive layer; and a third step of forming a second conductive layer on the insulating layer and the first conductive layer. The flexible substrate, viewed from above, has a visual recognition area, a peripheral wiring area located outside the visual recognition area, and a connecting wiring area located outside the peripheral wiring area in a predetermined direction. The first conductive layer comprises: a first detection electrode portion disposed in the visual recognition area; a first lead-out wiring portion disposed in the peripheral wiring area and electrically connected to the first detection electrode portion; and an anchoring electrode portion disposed in the connecting wiring area and at least a portion electrically connected to the first lead-out wiring portion. The two conductive layers have: a second detection electrode portion disposed in a visual recognition area; a second lead-out wiring portion disposed in a peripheral wiring area and electrically connected to the second detection electrode portion; a second connection terminal portion disposed in a connection wiring area and electrically connected to the second lead-out wiring portion; and a first connection terminal portion disposed in the connection wiring area, electrically insulated from the second lead-out wiring portion and covered with an anchor electrode portion and electrically connected to the anchor electrode portion, the anchor electrode portion including a connection anchor portion connected to the first lead-out wiring portion and an independent anchor portion disposed at a distance from the connection anchor portion in a predetermined direction, and having at least a portion of the connection anchor portion and an exposed area of ​​the independent anchor portion not covered by the insulating layer, the first connection terminal portion being covered with the anchor electrode portion in the exposed area and electrically connected to the anchor electrode portion.

[0030] Invention Effects

[0031] According to the present invention, peeling of the connection terminal portion can be suppressed even though a flexible substrate is used. Attached Figure Description

[0032] Figure 1 This is a partial cross-sectional view of the conductive component for the touch panel in Embodiment 1 of the present invention.

[0033] Figure 2 This is a top view showing a portion of the conductive component for the touch panel according to Embodiment 1.

[0034] Figure 3 This is a diagram showing the anchoring electrode section in Embodiment 1.

[0035] Figure 4 This is a partial cross-sectional view of the touch panel display device in Embodiment 1.

[0036] Figure 5 This is a diagram showing the state of the manufacturing process of the conductive component for the touch panel according to Embodiment 1.

[0037] Figure 6This is a partial cross-sectional view showing another example of the touch panel display device in Embodiment 1.

[0038] Figure 7 This is a diagram showing a modified example of the anchoring electrode section in Embodiment 1.

[0039] Figure 8 This is a diagram showing the anchoring electrode section in Embodiment 2.

[0040] Figure 9 This is a diagram showing a first modified example of the anchoring electrode section in Embodiment 2.

[0041] Figure 10 This is a diagram showing a second modified example of the anchoring electrode section in Embodiment 2.

[0042] Figure 11 This is a diagram showing a third modified example of the anchoring electrode section in Embodiment 2. Detailed Implementation

[0043] The conductive component for the touch panel and the touch panel according to the present invention will now be described in detail based on the preferred embodiments shown in the accompanying drawings.

[0044] Furthermore, the symbol “~” used to indicate a range of values ​​includes the values ​​written on both sides. For example, “s is the value t1 to the value t2” means that the range of s includes the values ​​t1 and t2. If expressed in mathematical notation, it would be t1≤s≤t2.

[0045] Unless otherwise specified, angles including "orthogonal" and "parallel" are included within the generally permissible error range in the technical field.

[0046] The term "transparent" refers to a light transmittance of at least 40% in the visible light wavelength range of 400nm to 800nm, preferably 75% or more, more preferably 80% or more, and even more preferably 90% or more. The light transmittance is measured using the method specified in JIS K7375:2008, "Plastics—Determination of Total Light Transmittance and Total Light Reflectance—".

[0047] Implementation Method 1

[0048] Figure 1 This illustrates the structure of the conductive component 1 for a touch panel according to Embodiment 1 of the present invention.

[0049] The conductive component 1 for the touch panel includes a flexible substrate 2, a first conductive layer 3 disposed on one side of the flexible substrate 2, an insulating layer 4 disposed on the first conductive layer 3, and a second conductive layer 5 disposed on the insulating layer 4 and the first conductive layer 3. An anchoring electrode portion 11, protruding from the insulating layer 4, is formed at the end of the first conductive layer 3. The second conductive layer 5 has a second conductive layer body 21 stacked on the insulating layer 4 and a first connecting terminal portion 22 stacked on the anchoring electrode portion 11 protruding from the insulating layer 4. The second conductive layer body 21 and the first connecting terminal portion 22 are disposed spaced apart from each other and are electrically insulated from each other.

[0050] The first conductive layer 3 is preferably directly connected to one side of the flexible substrate 2, the insulating layer 4 is preferably directly connected to the first conductive layer 3, and the second conductive layer 5 is preferably directly connected to both the first conductive layer 3 and the insulating layer 4. The main body 21 of the second conductive layer is preferably directly connected to the insulating layer 4, and the first connecting terminal portion 22 is preferably directly connected to the anchoring electrode portion 11.

[0051] A cover component (not shown) is bonded to the surface of the touch panel on the side of the second conductive layer 5 using a conductive component 1, and a display module (not shown) is bonded to the surface of the flexible substrate 2, which can be used as a touch panel display device. At this time, the user's finger, pen, etc. that are in contact with or close to the cover component are detected to detect the user's touch operation.

[0052] Figure 2 The image shows a top view of a portion of the conductive component 1 for the touch panel.

[0053] The flexible substrate 2, when viewed from above, has a visual recognition area S1 for detecting touch operations such as fingers and pens, which is visually recognized by the user; a peripheral wiring area S2 located outside the visual recognition area S1; and a connection wiring area S3 located outside the peripheral wiring area S2 in a predetermined direction (also referred to as the first direction). Here, the predetermined direction refers to the direction in which the circuit board (not shown) is connected to the touch panel by the conductive member 1. The predetermined direction is designated as the X direction, and the direction orthogonal to the predetermined direction (also referred to as the second direction) is designated as the Y direction.

[0054] The first conductive layer 3 disposed on the flexible substrate 2 has a first detection electrode portion 12 extending along the X direction for detecting touch operation, a first lead wire portion 13 electrically connected to the first detection electrode portion 12, and an anchoring electrode portion 11 electrically connected to the first lead wire portion 13.

[0055] The first detection electrode portion 12 is composed of a plurality of first metal wires M1 intersecting each other in a mesh pattern and is disposed in the visual recognition area S1. Additionally, the first lead-out wiring portion 13 is disposed in the peripheral wiring area S2, and the anchor electrode portion 11 is disposed in the connecting wiring area S3. Furthermore, the first detection electrode portion 12 and the first lead-out wiring portion 13 are covered by an insulating layer 4, but the anchor electrode portion 11 has at least a portion of an exposed area R1 not covered by the insulating layer 4. Figure 2 In the diagram, the exposed area R1 is represented by the diagonal line.

[0056] The second conductive layer 5, located relatively far from the flexible substrate 2, comprises a second conductive layer body 21 and a first connecting terminal portion 22. The second conductive layer body 21 is disposed on the insulating layer 4, and the first connecting terminal portion 22 is disposed in a manner that isolates it from the second conductive layer body 21 and covers the periphery of the anchoring electrode portion 11. The exposed area R1 of the anchoring electrode portion 11 is covered by the first connecting terminal portion 22 and is electrically connected to it.

[0057] The second conductive layer body 21 has a second detection electrode portion 23 extending along the Y direction for detecting touch operation, a second lead-out wiring portion 24 electrically connected to the second detection electrode portion 23, and a second connection terminal portion 25 electrically connected to the second lead-out wiring portion 24.

[0058] The second detection electrode section 23 is composed of a plurality of second metal wires M2 that intersect each other in a mesh pattern and is disposed in the visual recognition area S1. In addition, the second lead-out wiring section 24 is disposed in the peripheral wiring area S2, and the second connection terminal section 25 is disposed in the connection wiring area S3.

[0059] In addition, although Figure 2 Not shown in the figure, but the first conductive layer 3 has a plurality of first detection electrode portions 12 extending along the X direction and arranged in the Y direction, a plurality of first lead-out wiring portions 13 electrically connected to the plurality of first detection electrode portions 12, and a plurality of anchoring electrode portions 11 electrically connected to the plurality of first lead-out wiring portions 13. Similarly, the second conductive layer 5 has a plurality of second detection electrode portions 23 extending along the Y direction and arranged in the X direction, a plurality of second lead-out wiring portions 24 electrically connected to the plurality of second detection electrode portions 23, and a plurality of second connection terminal portions 25 electrically connected to the plurality of second lead-out wiring portions 24.

[0060] In addition, the plurality of anchoring electrode portions 11 of the first conductive layer 3 and the plurality of second connecting terminal portions 25 of the second conductive layer 5 are arranged in the connecting wiring area S3 in a state of being arranged in the Y direction.

[0061] Furthermore, it is explained that the first detection electrode portion 12 extends along the X direction of the anchoring electrode portion 11 and the second detection electrode portion 23 extends along the Y direction orthogonal to the X direction of the anchoring electrode portion 11. However, the direction in which the first detection electrode portion 12 extends is not limited to the X direction, and the direction in which the second detection electrode portion 23 extends is not limited to the Y direction, as long as the first detection electrode portion 12 and the second detection electrode portion 23 intersect each other.

[0062] Figure 3 The image shows a top view of the anchoring electrode section 11.

[0063] The anchoring electrode portion 11 has a rectangular shape when viewed from above. This rectangular shape has a long side along the X direction and a short side along the Y direction. Furthermore, multiple rectangular openings A1, each having a long side along the Y direction and a short side along the X direction, are arranged at intervals along the X direction. These multiple openings A1 are disposed in the exposed area R1 of the anchoring electrode portion 11. That is, the anchoring electrode portion 11 is formed such that the surface of the flexible substrate 2 below is partially exposed through the multiple openings A1. Due to the presence of the multiple rectangular openings A1, the total length Y1 of the contour line of the anchoring electrode portion 11—that is, the length of the edge portion of the rectangular shape of the anchoring electrode portion 11 and the edge portion of the multiple openings A1—parallel to the Y direction is set to be greater than or equal to the total length X1 of the portion parallel to the X direction.

[0064] Furthermore, it was explained that the outline of the anchoring electrode section 11 extends along a predetermined direction, namely the X direction, or a direction orthogonal to the predetermined direction, namely the Y direction. However, it can also extend along a direction intersecting both the X and Y directions. In this case, the lengths of the components of the outline parallel to the X direction and the lengths of the components parallel to the Y direction can be determined by setting the angle between the direction of the tangent to the X direction of the outline to θ, and by...

[0065] (Length of the component of the contour line parallel to the X direction) = (Length of the contour line) × cosθ…(1)

[0066] (Length of the component of the contour line parallel to the Y direction) = (Length of the contour line) × sinθ…(2)

[0067] The calculation is based on the relationship (where 0°≤θ≤90°). Here, cosθ is the cosine function of angle θ, and sinθ is the sine function of angle θ.

[0068] The total length X1 of the components of the contour lines parallel to the X direction in the anchor electrode section 11 is the sum of the lengths of the components of the contour lines parallel to the X direction calculated using formula (1), covering all contour lines of the anchor electrode section 11. Similarly, the total length Y1 of the components of the contour lines parallel to the Y direction in the anchor electrode section 11 is the sum of the lengths of the components of the contour lines parallel to the Y direction calculated using formula (2), covering all contour lines of the anchor electrode section 11.

[0069] Furthermore, the shape of the anchoring electrode portion 11 is explained as follows: Figure 3 The example shown has multiple openings A1, but the shape of the anchoring electrode portion 11 is not limited to that shown. Figure 3 The shape shown can be a pattern in which the total length Y1 of the components parallel to the Y direction of the outline of the anchor electrode part 11 is greater than or equal to the total length X1 of the components parallel to the X direction.

[0070] Here, as Figure 2 As shown, the first connection terminal portion 22 and the second connection terminal portion 25 disposed in the connection wiring area S3 are connected to a flexible circuit board (not shown), for example, and are electrically connected to an external circuit via the flexible circuit board. At this time, the flexible circuit board is configured to extend from the flexible substrate 2 in the X direction, but when the flexible circuit board is folded back for connection to an external circuit, stress in the X direction and stress in the Z direction orthogonal to the XY plane are generated on the first connection terminal portion 22.

[0071] This stress is the main cause of peeling between the first connecting terminal portion 22 and the anchoring electrode portion 11. However, since the total length of the Y-direction parallel component of the outline of the anchoring electrode portion 11 is greater than the total length of the X-direction parallel component X1, the stress of the first connecting terminal portion 22 in the X-direction can be overcome, thereby suppressing peeling between the first connecting terminal portion 22 and the anchoring electrode portion 11.

[0072] According to Embodiment 1 of the present invention, the conductive component 1 for a touch panel has an anchoring electrode portion 11 formed in a pattern such that, when viewed from above, the total length Y1 of the components parallel to the Y direction of the outline portion of the anchoring electrode portion 11 is equal to or greater than the total length X1 of the components parallel to the X direction. Therefore, it is possible to suppress peeling between the first connecting terminal portion 22 and the anchoring electrode portion 11.

[0073] like Figure 7As shown, the anchoring electrode portion 11B can be formed into a pattern having a mesh-shaped portion E1 and a rectangular-shaped portion E2. The mesh-shaped portion E1 has a plurality of openings A2 arranged in two mutually orthogonal directions, and the rectangular-shaped portion E2 has a long side along the Y direction and a short side along the X direction. The anchoring electrode portion 11B is formed into a shape pattern in which the surface of the underlying flexible substrate 2 is partially exposed through the plurality of openings A2. Even when the anchoring electrode portion 11B is formed into a pattern... Figure 7 In the case of the pattern shown, since the total length Y1 of the components parallel to the Y direction of the outline of the anchor electrode portion 11B is greater than or equal to the total length X1 of the components parallel to the X direction, the stress acting on the interface between the first connecting terminal portion 22 and the anchor electrode portion 11B can be overcome, and the peeling between the first connecting terminal portion 22 and the anchor electrode portion 11B can be suppressed.

[0074] Viewed from above, the ratio of the area of ​​the anchoring electrode portion 11 in the exposed area R1 to the area of ​​the first connecting terminal portion 22 in the exposed area R1 is preferably 50% or less. By designing the area ratio to this range, the stress acting on the first connecting terminal portion 22 and the anchoring electrode portion 11 can be further mitigated, and the adhesion between the first connecting terminal portion 22 and the flexible substrate 2 can be strengthened, thereby further suppressing the peeling between the first connecting terminal portion 22 and the anchoring electrode portion 11B.

[0075] The ratio of the area of ​​the anchoring electrode portion 11 in the exposed region R1 to the area of ​​the first connecting terminal portion 22 in the exposed region R1 is preferably 45% or less, and most preferably 40% or less. The ratio of the area of ​​the anchoring electrode portion 11 in the exposed region R1 to the area of ​​the first connecting terminal portion 22 in the exposed region R1 is preferably 10% or more, and more preferably 20% or less.

[0076] Here, as Figure 4 As shown, a touch panel 6 can be constructed by bonding a transparent cover member 8 to the second conductive layer 5 of the conductive member 1 for the touch panel using a transparent adhesive B1. The cover member 8 protects the conductive member 1 for the touch panel and forms a touch surface for touch operation by the user's finger, pen, etc.

[0077] In addition, Figure 2 In the peripheral wiring area S2 and the connecting wiring area S3 shown, a decorative printing portion D is formed on the surface of the touch panel conductive component 1 of the cover component 8. The decorative printing portion D is opaque and serves to cover the first detection electrode portion 12, the first lead-out wiring portion 13, the anchoring electrode portion 11 of the first conductive layer 3, and the second detection electrode portion 23, the second lead-out wiring portion 24, the first connecting terminal portion 22, and the second connecting terminal portion 25 of the second conductive layer 5.

[0078] Additionally, on the surface of the first connecting terminal portion 22 on the side of the cover member 8, one end of a flexible circuit board C, which is electrically connected to an external circuit (not shown), is connected. Similarly, although not shown, one end of the flexible circuit board C is also connected to the second connecting terminal portion 25 of the second conductive layer 5.

[0079] Furthermore, in the touch panel 6, a display module 9 for displaying images is attached to the surface of the flexible substrate 2 opposite to the first conductive layer 3 using a transparent adhesive B2, thus forming a touch panel display device 7. Although not shown in detail, the display module 9 includes a display surface such as a liquid crystal display and a controller for controlling the display of images on the display surface. The user of the touch panel display device 7 visually recognizes the image displayed on the display module 9 via the touch panel 6, and performs touch operations based on the visually recognized image via the touch panel 6.

[0080] In this touch panel display device 7, for example, the flexible circuit board C is folded back relative to one end connected to the first connection terminal portion 22 and the second connection terminal portion 25, with the other end facing the opposite side of the display surface of the display module 9.

[0081] The touch panel display device 7 includes the conductive component 1 for the touch panel according to Embodiment 1 of the present invention, thereby suppressing the risk of failure caused by the peeling between the first connection terminal portion 22 and the anchoring electrode portion 11.

[0082] In addition, Figure 4 In the touch panel display device 7 shown, the flexible circuit board C, which is connected to the first connection terminal portion 22 and the second connection terminal portion 25, is folded back in a manner facing the opposite side of the display surface of the display module 9, for example, as shown. Figure 6 As shown, the laminate consisting of the flexible substrate 2A, the anchoring electrode portion 11A, and the first connecting terminal portion 22A can also be folded back so that it faces the opposite side of the display surface of the display module 9, and at its ends, the flexible circuit board C is connected to the first connecting terminal portion 22A and the second connecting terminal portion 25. The anchoring electrode portion 11A and Figure 3 The anchoring electrode section 11 shown is similarly configured such that the total length Y1 of the components of the outline of the anchoring electrode section 11A that are parallel to the Y direction is greater than or equal to the total length X1 of the components that are parallel to the X direction.

[0083] In this case, stress occurs at the interface between the first connecting terminal portion 22A and the anchoring electrode portion 11A due to the folding of the laminate composed of the flexible substrate 2A, the anchoring electrode portion 11A, and the first connecting terminal portion 22A. However, since the total length Y1 of the components of the outline of the anchoring electrode portion 11A that are parallel to the Y direction is greater than or equal to the total length X1 of the components that are parallel to the X direction, the stress can be overcome and the peeling between the first connecting terminal portion 22A and the anchoring electrode portion 11A can be suppressed.

[0084] Hereinafter, the components of the conductive member 1 for the touch panel and the touch panel 6 constituting Embodiment 1 will be described. Furthermore, the components constituting the conductive member for the touch panel in Embodiment 2 described later will also be based on the components constituting the conductive member 1 for the touch panel in Embodiment 1.

[0085] <Flexible substrate>

[0086] The flexible substrate 2 is not particularly limited, as long as it is transparent, electrically insulating, and flexible; for example, a resin substrate can be used. More specifically, materials constituting the flexible substrate 2 may include, for example, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), cyclo-olefin polymer (COP), cyclic olefin copolymer (COC), polycarbonate (PC), acrylic resin, polyethylene (PE), polypropylene (PP), polystyrene (PS), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), cellulose triacetate (TAC), etc. The thickness of the flexible substrate 2 is preferably 20 μm to 1100 μm, more preferably 20 μm to 500 μm. In particular, in the case of organic resin substrates such as PET, the thickness is preferably 20 μm to 200 μm, and more preferably 30 μm to 100 μm.

[0087] The total light transmittance of the flexible substrate 2 is preferably 40% to 100%. The total light transmittance is measured, for example, using the method specified in JIS K7375:2008, "Plastics - Determination of total light transmittance and total light reflectance -".

[0088] One preferred embodiment of the flexible substrate 2 is a substrate that has undergone at least one treatment selected from the group consisting of atmospheric pressure plasma treatment, corona discharge treatment, and ultraviolet irradiation treatment. By performing the above treatment, hydrophilic groups such as OH groups are introduced onto the surface of the treated flexible substrate 2, thereby improving the adhesion between the flexible substrate 2 and the first conductive layer 3. Furthermore, among the above treatments, atmospheric pressure plasma treatment is preferred from the perspective of further improving the adhesion between the flexible substrate 2 and the first conductive layer 3.

[0089] <First conductive layer and second conductive layer>

[0090] The first conductive layer 3 and the second conductive layer 5 can be formed using metals or alloys, such as silver, copper, gold, aluminum, nickel, chromium, molybdenum, or tungsten. Copper is preferably contained in the first conductive layer 3 and the second conductive layer 5, but metals other than copper, such as gold and silver, may also be contained. Additionally, the first conductive layer 3 and the second conductive layer 5 may contain metallic silver suitable for forming a grid pattern and polymeric adhesives such as gelatin or acrylic-styrene latex. Other preferred metals include aluminum, silver, molybdenum, titanium, and their alloys. Furthermore, a layered structure of these metals is also possible; for example, metal wires with a layered structure of molybdenum / copper / molybdenum or molybdenum / aluminum / molybdenum can be used.

[0091] Furthermore, the first conductive layer 3 and the second conductive layer 5 may also be conductive layers containing metal oxide particles, metal pastes such as silver paste and copper paste, and metal nanowire particles such as silver nanowires and copper nanowires. The first conductive layer and the second conductive layer are preferably formed of the same metallic material.

[0092] Next, the methods for forming the first conductive layer 3 and the second conductive layer 5 will be described. For example, sputtering, plating, silver halide, and printing methods can be appropriately used for their formation.

[0093] The method for forming the first conductive layer 3 and the second conductive layer 5 based on sputtering will be described. First, a copper foil layer is formed by sputtering, and copper wiring is formed from the copper foil layer by photolithography, thereby forming the first conductive layer 3 and the second conductive layer 5. Alternatively, the copper foil layer can be formed by vapor deposition instead of sputtering. In addition to sputtered or vapor-deposited copper foil, the copper foil layer can also be formed using electrolytic copper foil. More specifically, the process for forming copper wiring described in Japanese Patent Application Publication No. 2014-29614 can be used.

[0094] The method for forming the first conductive layer 3 and the second conductive layer 5 based on the plating method will be described. For example, the first conductive layer 3 and the second conductive layer 5 can be constructed using a metal plating film formed on a substrate layer by performing electroless plating on an electroless plating substrate layer. In this case, the first conductive layer 3 and the second conductive layer 5 are formed by: after forming a pattern of catalyst ink containing at least metal microparticles on a substrate, immersing the substrate in an electroless plating bath to form a metal plating film. More specifically, the method for manufacturing a metal coating substrate described in Japanese Patent Application Publication No. 2014-159620 can be used.

[0095] Furthermore, the first conductive layer 3 and the second conductive layer 5 are formed by: patterning a resin composition having at least functional groups capable of interacting with a metal catalyst precursor on a substrate, then applying a catalyst or catalyst precursor, and immersing the substrate in an electroless plating bath to form a metal plating film. More specifically, the method for manufacturing a metal coating substrate described in Japanese Patent Application Publication No. 2012-144761 can be applied.

[0096] The method for forming the first conductive layer 3 and the second conductive layer 5 based on the silver halide method will be described. First, an exposure pattern that becomes the first conductive layer 3 and the second conductive layer 5 is used to expose a silver halide-containing silver halide emulsion layer, followed by development, thereby forming the first conductive layer 3 and the second conductive layer 5. More specifically, the manufacturing method of the metal wire described in Japanese Patent Application Publication Nos. 2012-6377, 2014-112512, 2014-209332, 2015-22397, 2016-192200 and International Publication No. 2016 / 157585 can be used.

[0097] A method for forming the first conductive layer 3 and the second conductive layer 5 based on a printing method will be described. First, a conductive paste containing conductive powder is applied to a substrate in a manner that forms the same pattern as the first conductive layer 3 and the second conductive layer 5. Then, the first conductive layer 3 and the second conductive layer 5 can be formed by performing a heat treatment. The pattern formation using the conductive paste can be performed, for example, by inkjet printing or screen printing. More specifically, the conductive paste described in Japanese Patent Application Publication No. 2011-28985 can be used as the conductive paste.

[0098] <Cover Components>

[0099] The material used for the cover component 8 can be tempered glass, polycarbonate, polyethylene terephthalate, polymethyl methacrylate resin (PMMA), etc., and the thickness of the cover component 8 is preferably 0.1 mm to 1.5 mm.

[0100] <Adhesive>

[0101] As adhesive B1 for bonding the conductive component 1 and the cover component 8 of the touch panel to each other, and adhesive B2 for bonding the conductive component 1 of the touch panel and the display module 9 to each other, optically clear adhesive sheets (OCA) or optically clear adhesive resins (OCR) can be used, preferably with a film thickness of 10 μm or more and 200 μm or less. For example, the 8146 series manufactured by 3M can be used as an optically clear adhesive sheet.

[0102] Implementation Method 2

[0103] Figure 8 The text indicates the anchoring electrode section 11C in Embodiment 2.

[0104] The anchoring electrode portion 11C has a rectangular connecting anchor portion E3 electrically connected to the first lead-out wiring portion 13 and independent anchor portions E4 spaced apart in the X direction from the connecting anchor portion E3. Additionally, the anchoring electrode portion 11C has an exposed area R1 not covered by the insulating layer 4, and at least a portion of the connecting anchor portion E3 and the independent anchor portions E4 are disposed in the exposed area R1.

[0105] The independent anchoring part E4 has a plurality of unit anchoring parts F4 arranged at intervals in the X direction. Each unit anchoring part F4 has a rectangular shape, which has a long side along the Y direction and a short side along the X direction.

[0106] The first connection terminal portion 22 of the second conductive layer 5 is formed on the anchoring electrode portion 11C and the flexible substrate 2 in such a way that it is electrically connected to the connection anchoring portion E3 and the independent anchoring portion E4.

[0107] Here, as Figure 4 As shown, when the flexible circuit board connected to the first connection terminal portion 22 and the second connection terminal portion 25 is folded back, or as... Figure 6 As shown, when the laminate composed of the flexible substrate 2A, the anchoring electrode portion 11A, and the first connecting terminal portion 22A is folded back, stress is applied to the interface between the anchoring electrode portion 11C and the first connecting terminal portion 22A. However, since the anchoring electrode portion 11C is arranged at intervals in the X direction from the connecting anchor portion E3 and has an independent anchor portion E4 composed of multiple unit anchor portions F4, the stress is not concentrated but dispersed by the independent anchor portions E4, which can suppress the peeling between the first connecting terminal portion 22A and the anchoring electrode portion 11C.

[0108] Thus, even in the conductive component for touch panel of Embodiment 2, where the anchoring electrode portion 11C has an independent anchoring portion E4, the peeling between the first connecting terminal portion 22 and the anchoring electrode portion 11C can be suppressed, just like in the conductive component for touch panel of Embodiment 1.

[0109] also, Figure 8 The independent anchoring portion E4 of the anchoring electrode portion 11C shown has multiple unit anchoring portions F4. However, even with only one unit anchoring portion F4, the stress acting on the anchoring electrode portion 11C and the first connecting terminal portion 22 is dispersed, and peeling between the anchoring electrode portion 11C and the first connecting terminal portion 22 can be suppressed. However, from the viewpoint of dispersing stress and stably fixing the first connecting terminal portion 22, it is preferable that the independent anchoring portion E4 has two or more unit anchoring portions F4.

[0110] Furthermore, the shape of the anchoring electrode portion 11C is not particularly limited to Figure 8 The shape shown.

[0111] For example, such as Figure 9 As shown, the anchoring electrode section 11D can also have an independent anchoring section E5, which has multiple rectangular unit anchoring sections F5 arranged in the X and Y directions. In the anchoring electrode section 11D, at least a portion of the anchoring section E3 and the independent anchoring section E5 are also disposed in the exposed area R1.

[0112] The shape of the anchoring part F5 of this unit is not limited to a rectangle. For example, it can be designed as any shape such as a rhombus, a circle, or a polygon.

[0113] In addition, for example, Figure 10 The anchoring electrode portion 11E shown has a connecting anchoring portion E6 and an independent anchoring portion E7. The connecting anchoring portion E6 connects to one end of a plurality of rectangular portions G1, each having a long side along the X direction and a short side along the Y direction, arranged in the Y direction. The independent anchoring portion E7 has a plurality of unit anchoring portions F7, each having a rectangular shape and arranged in the X direction, the rectangle having a long side along the Y direction and a short side along the X direction. In the anchoring electrode portion 11E, at least a portion of the connecting anchoring portion E6 and the independent anchoring portion E7 are also disposed in the exposed area R1.

[0114] In addition, for example, Figure 11The anchoring electrode portion 11F shown has a generally rectangular connecting anchor portion E8 and an independent anchor portion E9. The independent anchor portion E9 has a plurality of rectangular unit anchor portions F9, the rectangle having a long side along the X direction and a short side along the Y direction. In the anchoring electrode portion 11F, at least a portion of the connecting anchor portion E8 and the independent anchor portion E9 are also disposed in the exposed area R1. The independent anchor portions E9 are arranged in a zigzag pattern with the plurality of unit anchor portions F9 interlaced in the Y direction.

[0115] In this way, even if the anchoring electrode sections 11D, 11E, and 11F have Figures 9-11 In the case of the shape illustrated, the stress acting on the anchoring electrode portions 11D, 11E and 11F and the first connecting terminal portion 22 can also be alleviated, and the peeling between the anchoring electrode portions 11D, 11E and 11F and the first connecting terminal portion 22 can be suppressed.

[0116] Furthermore, apart from the anchoring electrode portion described above, the conductive component for the touch panel in Embodiment 2 can adopt the same structure as the conductive component for the touch panel in Embodiment 1.

[0117] The manufacturing method of the conductive component 1 for a touch panel according to Embodiment 1 of the present invention will be described.

[0118] First, a flexible substrate 2 is prepared, and a first detection electrode portion 12, a first lead-out wiring portion 13 and an anchoring electrode portion 11 are patterned on the flexible substrate 2 to form a first conductive layer 3.

[0119] Next, the insulating layer 4 is patterned so that the exposed area R1 of the anchor electrode portion 11 is exposed, as shown in the figure. Figure 5 As shown, an insulating layer 4 is formed on the first conductive layer 3.

[0120] Furthermore, on the insulating layer 4, the second conductive layer body 21, which is composed of the second detection electrode part 23, the second lead wire part 24 and the second connection terminal part 25, is patterned. At the same time, the first connection terminal part 22 is patterned in such a way that it covers the anchoring electrode part 11 and is arranged at intervals from the second conductive layer body 21, thus forming the second conductive layer 5.

[0121] Thus, conductive component 1 for manufacturing touch panel is produced.

[0122] Since the anchoring electrode portion 11 is covered by the first connecting terminal portion 22, the risk of damage during the manufacturing process of the conductive component 1 for the touch panel is reduced. In addition, since the second conductive layer body 21 and the first connecting terminal portion 22 are formed simultaneously, the conductive component 1 for the touch panel can be manufactured with fewer processes.

[0123] Furthermore, the manufacturing method of the conductive component for the touch panel according to Embodiment 2 is based on the manufacturing method of the conductive component 1 for the touch panel according to Embodiment 1.

[0124] Symbol Explanation

[0125] 1. 1A Conductive component for touch panel; 2. 2A Flexible substrate; 3. 3A First conductive layer; 4 Insulating layer; 5 Second conductive layer; 6. 6A Touch panel; 7. 7A Touch panel display device; 8 Cover component; 9 Display module; 11. 11A, 11B, 11C, 11D, 11E, 11F Anchoring electrode section; 12 First detection electrode section; 13 First lead-out wiring section; 21 Second conductive layer body; 22. 22A First connection terminal section; 23 Second detection electrode section; 24 Second Lead-out wiring section; 25 Second connecting terminal section; A1, A2 Openings; B1, B2 Adhesive; C Flexible circuit board; D Decorative printing section; E1 Mesh-shaped section; E2, G1 Rectangular-shaped sections; E3, E6, E8 Connecting anchoring sections; E4, E5, E7, E9 Independent anchoring sections; F4, F5, F7, F9 Unit anchoring sections; M1 First metal wire; M2 Second metal wire; R1 Exposed area; S1 Visual recognition area; S2 Peripheral wiring area; S3 Connecting wiring area.

Claims

1. A conductive component for a touch panel, comprising: Flexible substrate; A first conductive layer is disposed on one surface of the flexible substrate; An insulating layer disposed on the first conductive layer; as well as A second conductive layer is disposed on the insulating layer and the first conductive layer. The flexible substrate, when viewed from above, has a visual recognition area, a peripheral wiring area located outside the visual recognition area, and a connection wiring area located outside the peripheral wiring area in a predetermined direction. The first conductive layer has: A first detection electrode is disposed in the visual recognition area; A first lead-out wiring portion is disposed in the peripheral wiring area and electrically connected to the first detection electrode portion; as well as An anchoring electrode portion is disposed in the connection wiring area and electrically connected to the first lead-out wiring portion. The second conductive layer has: The second detection electrode is disposed in the visual recognition area; The second lead-out wiring section is disposed in the peripheral wiring area and is electrically connected to the second detection electrode section; The second connection terminal portion is disposed in the connection wiring area and is electrically connected to the second lead-out wiring portion; as well as A first connecting terminal portion is disposed in the connecting wiring area, is electrically insulated from the second lead-out wiring portion, and is covered by the anchoring electrode portion and electrically connected to the anchoring electrode portion. The anchoring electrode portion forms a shape pattern that partially exposes the surface of the flexible substrate when viewed from above, and has at least a portion of exposed areas not covered by the insulating layer. The first connecting terminal portion covers the anchoring electrode portion in the exposed area and is electrically connected to the anchoring electrode portion. The sum of the lengths Y1 of the components orthogonal to the predetermined direction of the outline of the shape pattern of the anchoring electrode portion covered by the first connecting terminal portion is greater than or equal to the sum of the lengths X1 of the components parallel to the predetermined direction.

2. A conductive component for a touch panel, comprising: Flexible substrate; A first conductive layer is disposed on one surface of the flexible substrate; An insulating layer disposed on the first conductive layer; as well as A second conductive layer is disposed on the insulating layer and the first conductive layer. The flexible substrate, when viewed from above, has a visual recognition area, a peripheral wiring area located outside the visual recognition area, and a connection wiring area located outside the peripheral wiring area in a predetermined direction. The first conductive layer has: A first detection electrode is disposed in the visual recognition area; A first lead-out wiring portion is disposed in the peripheral wiring area and electrically connected to the first detection electrode portion; as well as An anchoring electrode portion is disposed in the connection wiring area and at least a portion thereof is electrically connected to the first lead-out wiring portion. The second conductive layer has: The second detection electrode is disposed in the visual recognition area; The second lead-out wiring section is disposed in the peripheral wiring area and is electrically connected to the second detection electrode section; The second connection terminal portion is disposed in the connection wiring area and is electrically connected to the second lead-out wiring portion; as well as A first connection terminal portion is disposed in the connection wiring area, is electrically insulated from the second lead-out wiring portion, covers the anchoring electrode portion, and is electrically connected to the anchoring electrode portion. The anchoring electrode portion includes a connecting anchoring portion connected to the first lead-out wiring portion and independent anchoring portions spaced apart from the connecting anchoring portion in a predetermined direction. The anchoring electrode portion has at least a portion of the connecting anchoring portion and an exposed area of ​​the independent anchoring portion that is not covered by the insulating layer. The first connection terminal portion is covered by the anchoring electrode portion in the exposed area and is electrically connected to the anchoring electrode portion.

3. The conductive component for a touch panel according to claim 2, wherein, The independent anchoring part has multiple unit anchoring parts arranged at intervals from each other.

4. The conductive component for a touch panel according to any one of claims 1 to 3, wherein, Viewed from above, the ratio of the area of ​​the anchoring electrode portion in the exposed area to the area of ​​the first connecting terminal portion in the exposed area is less than 50%.

5. The conductive component for a touch panel according to any one of claims 1 to 3, wherein, The first conductive layer and the second conductive layer are formed of the same metallic material.

6. A touch panel, comprising: Conductive component for touch panel according to any one of claims 1 to 5; Circuit board, which is electrically connected to the first connection terminal portion and the second connection terminal portion; and The cover component is disposed on the second conductive layer via an adhesive.

7. A touch panel display device, comprising: The touch panel as described in claim 6; The display module has a display surface that is bonded to another surface of the flexible substrate via an adhesive.

8. The touch panel display device according to claim 7, wherein, The circuit board is folded back in such a way that one end is connected to the first connection terminal portion and the second connection terminal portion, and the other end faces the opposite side of the display surface of the display module.

9. The touch panel display device according to claim 7, wherein, The connecting wiring area is folded back with its ends facing the opposite side of the display surface of the display module.

10. A method for manufacturing a conductive component for a touch panel, comprising the method for manufacturing the conductive component for a touch panel as described in claim 1, wherein, have: The first step of forming a first conductive layer on one surface of a flexible substrate; The second step of forming an insulating layer on the first conductive layer; as well as The third step is to form a second conductive layer on the insulating layer and on the first conductive layer. The flexible substrate, when viewed from above, has a visual recognition area, a peripheral wiring area located outside the visual recognition area, and a connection wiring area located outside the peripheral wiring area in a predetermined direction. The first conductive layer has: A first detection electrode is disposed in the visual recognition area; A first lead-out wiring portion is disposed in the peripheral wiring area and electrically connected to the first detection electrode portion; as well as An anchoring electrode portion is disposed in the connection wiring area and electrically connected to the first lead-out wiring portion. The second conductive layer has: The second detection electrode is disposed in the visual recognition area; The second lead-out wiring section is disposed in the peripheral wiring area and is electrically connected to the second detection electrode section; The second connection terminal portion is disposed in the connection wiring area and is electrically connected to the second lead-out wiring portion; as well as A first connecting terminal portion is disposed in the connecting wiring area, is electrically insulated from the second lead-out wiring portion, and is covered by the anchoring electrode portion and electrically connected to the anchoring electrode portion. The anchoring electrode portion forms a shape pattern that partially exposes the surface of the flexible substrate when viewed from above, and has at least a portion of exposed areas not covered by the insulating layer. The first connecting terminal portion is covered by the anchoring electrode portion in the exposed area and is electrically connected to the anchoring electrode portion. The sum of the lengths Y1 of the components orthogonal to the predetermined direction of the outline of the shape pattern of the anchoring electrode portion covered by the first connecting terminal portion is greater than or equal to the sum of the lengths X1 of the components parallel to the predetermined direction.

11. A method for manufacturing a conductive component for a touch panel, comprising the method for manufacturing the conductive component for a touch panel as described in claim 2, wherein, have: The first step of forming a first conductive layer on one surface of a flexible substrate; The second step of forming an insulating layer on the first conductive layer; as well as The third step is to form a second conductive layer on the insulating layer and on the first conductive layer. The flexible substrate, when viewed from above, has a visual recognition area, a peripheral wiring area located outside the visual recognition area, and a connection wiring area located outside the peripheral wiring area in a predetermined direction. The first conductive layer has: A first detection electrode is disposed in the visual recognition area; A first lead-out wiring portion is disposed in the peripheral wiring area and electrically connected to the first detection electrode portion; as well as An anchoring electrode portion is disposed in the connection wiring area and at least a portion thereof is electrically connected to the first lead-out wiring portion. The second conductive layer has: The second detection electrode is disposed in the visual recognition area; The second lead-out wiring section is disposed in the peripheral wiring area and is electrically connected to the second detection electrode section; The second connection terminal portion is disposed in the connection wiring area and is electrically connected to the second lead-out wiring portion; as well as A first connecting terminal portion is disposed in the connecting wiring area, is electrically insulated from the second lead-out wiring portion, and is covered by the anchoring electrode portion and electrically connected to the anchoring electrode portion. The anchoring electrode portion includes a connecting anchoring portion connected to the first lead-out wiring portion and independent anchoring portions spaced apart from the connecting anchoring portion in a predetermined direction. The anchoring electrode portion has at least a portion of the connecting anchoring portion and an exposed area of ​​the independent anchoring portion that is not covered by the insulating layer. The first connection terminal portion is covered by the anchoring electrode portion in the exposed area and is electrically connected to the anchoring electrode portion.

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