WO2015015691A1 - Touch panel sensor sheet module and method for manufacturing touch panel system module - Google Patents

Abstract

The present invention achieves relatively high flexibility and easy management of overall thickness without an increase in the number of processes, ensures high reliability of connection between a transparent sheet having a conductive film formed thereon and a flexible printed circuit (FPC) board, and suppresses the occurrence of problems such as peeling of the FPC board at the time of assembling after the board is joined. Flexible printed circuit (FPC) boards (7, 7A) are respectively covered with a transparent adhesive sheet (reinforcement member) (8) in the width directions thereof in order to reinforce the joint parts of the FPC boards (7, 7A). Consequently, high reliability of connection between transparent sheets (3, 4), on which conductive films (3a, 4a) are respectively formed and the FPC boards (7, 7A) can be ensured, and the problem of the FPC boards (7, 7A) peeling off after being joined to the transparent sheets (3, 4) can be prevented or suppressed. In addition, by using a transparent adhesive sheet (reinforcement member) (8) in which an optical clear adhesive (OCA) sheet is superimposed on a transparent sheet (PET) that is also used in one member of a touch panel sensor sheet module (1), the risks associated with procuring new materials can be reduced.

Description

Method for manufacturing touch panel sensor sheet module and touch panel system module

The present invention is a personal computer (PC), a tablet terminal, a digital signage, and an electronic device that is mounted on a display screen of a display device such as a liquid crystal display device and detects an instruction position by an instruction operation using an indicator corresponding to display contents. The present invention relates to a touch panel sensor sheet module used for a capacitive touch panel that can be used for applications such as a blackboard and enables multi-touch, and a method of manufacturing a touch panel system module using the same.

A conventional method for manufacturing a touch panel system module is a method in which a transparent sheet on which a conductive film is formed is bonded and laminated via an adhesive sheet called OCA (Optical Clear Adhesive), and a cover glass is also bonded using OCA to form a module. Yes. The material of the transparent sheet is a PET (Polyethylene terephthalate) material, and the conductive film on the transparent sheet uses Cu, Ag, Au, Al having a low conductor resistance as a conductor for the purpose of improving the reaction speed. This touch panel system module specifies the indicated position of touch coordinates by a change in the capacitance of the transparent sheet.

FPC is joined to the external connection electrode wiring formed on the outer peripheral portion of the transparent sheet on which the conductive film is formed, and the opposite side of the FPC is connected to a control board or the like. The connection between the transparent sheet and the FPC is performed by sandwiching an anisotropic conductive film such as an ACF (anisotropic conductive film), and heating and pressing.

As for the touch panel sensor sheet module used in the conventional touch panel system module, since PET is mainly used for the transparent sheet, if the transparent sheet is heated to about 180 degrees Celsius to 200 degrees Celsius like the liquid crystal module, the transparent sheet There is also a risk of deformation or dissolution. For this reason, an anisotropic conductive film for low-temperature connection at 150 degrees Celsius or less is used. Thereafter, an electrode terminal (input terminal) opposite to the bonded FPC transparent sheet is inserted into a socket and connected to a control board to constitute a conventional touch panel system module.

FIG. 14 is a perspective view showing an example of an FPC joint portion of a conventional touch panel sensor sheet module.

14, a conventional touch panel sensor sheet module 90 includes a cover glass 91, a transparent sheet 92 having a plurality of conductive films formed on the cover glass 91, and a plurality of conductive films on the transparent sheet 92. Is formed on the upper surface of the transparent sheet 93, the protective film 94 provided on the plurality of conductive films 93a of the transparent sheet 93, and the end of the upper surface of the transparent sheet 92 is exposed. An anisotropic conductive film 95 disposed on a plurality of electrode lead portions of any of a plurality of sense lines and a plurality of drive lines on the upper surface of the electrode, and an anisotropic conductive film so as to correspond to the plurality of electrode lead portions 95 and an FPC 96 in which a plurality of conductive films are arranged.

On the transparent sheet bonding side of the FPC 96, the plurality of electrode lead portions of the transparent sheet 92 and the plurality of conductive films of the FPC 96 are electrically bonded by thermal pressure with an anisotropic conductive film 95 interposed therebetween. Yes. The opposite side of the FPC 96 is connected to a control board on which a controller IC is mounted.

The plurality of electrode lead portions of the transparent sheet 92 of the conventional touch panel sensor sheet module 90 and the plurality of conductive films of the FPC 96 are only heating / pressure bonding through the anisotropic conductive film 95, The bonding between the plurality of electrode lead portions and the plurality of conductive films of the FPC 96 is maintained only by the adhesion strength with the anisotropic conductive film 95.

In this case, a kind of ACF of the anisotropic conductive film 95 has a certain degree of strength even at low-temperature bonding by the development of the material manufacturer, but the surface state of the pasting portion of the transparent conductive sheet 92 and the anisotropic conductive film 95 of the FPC 96 Depending on (contamination, etc.), the strength may decrease.

When the module in which the transparent sheet 92 and the FPC 96 are joined is assembled as the touch panel sensor sheet module 90 in another assembly manufacturer or factory, not in the FPC joining manufacturer, the electrode terminal (input terminal) of the FPC 96 is a socket of the control board, etc. In some cases, a large load is applied to the joint, and the FPC 96 joined to the transparent sheet 92 and the joint are peeled off, possibly causing a problem in the multi-touch function.

In order to prevent this, an example in which the joint portion is solidified with a protective layer made of a silicone resin is proposed in the following Patent Document 1.

FIG. 15 is a top view of a conventional touch panel sensor sheet module disclosed in Patent Document 1. FIG. 16 is a cross-sectional view taken along line AA in FIG.

In the conventional touch panel sensor sheet module 100 of FIG. 15, a first transparent conductive film 102 made of ITO is formed on the entire upper surface of the first transparent substrate 101. On the first transparent conductive film 102, dot spacers 103 with minute dimensions made of an insulating epoxy resin are provided at a predetermined pitch.

On the other hand, a second transparent conductive film 105 made of ITO is formed on the entire lower surface of the second transparent substrate 104 made of a biaxially stretched polyethylene terephthalate film having a thickness of 188 μm.

The first transparent substrate 101 and the second transparent substrate 104 are bonded to each other at an outer portion of the visible region boundary 106. Inside the visible region boundary 106 of the touch panel, the first transparent conductive film 102 and the second transparent conductive film 105 are However, they face each other so as to be in an insulating state with an interval of about 20 to 500 μm maintained.

A hard coat layer 107 made of acrylic resin and having a pencil hardness of 3H is provided on the upper surface side of the second transparent substrate 104 in order to protect scratches and the like that are likely to occur during operation with the indicator.

In the bonding portion between the first transparent substrate 101 and the second transparent substrate 104, the wiring by the printed dry film of the conductive paint in which silver powder is dispersed in the resin outside the visible region boundary 106 on the first transparent substrate 101 side. And an electrode 108 for supplying a voltage to the transparent conductive film (hereinafter referred to as a wiring / electrode pattern), an insulating undercoat resist 109, an overcoat resist 110, and an adhesive for fixing the first transparent substrate 101 and the second transparent substrate 104 together. The layer 111 and the like are formed in a predetermined pattern, and similarly, the wiring and electrode pattern 112, the insulating undercoat resist 113, the overcoat resist 114, and the like are also formed on the second transparent substrate 104 side outside the visible region boundary 106. Has been.

The flexible wiring board 115 (hereinafter referred to as FPC) transmits signals derived from the first and second transparent conductive films 102 and 105 to an external circuit. The FPC 115 is made of polyimide as a material for the base film 116, and a wiring pattern 117 in which a plurality of predetermined patterns are arranged on one side is made of gold-plated copper foil. A polyimide cover that covers portions of the wiring patterns 117 that do not need to be exposed. It has a ray 118.

The FPC 115 is thermocompression bonded and fixed to the position of the outer peripheral edge of the upper surface of the first transparent substrate 101 through an anisotropic conductive film 119 mainly composed of epoxy resin and gold-plated resin beads, and its tail portion is connected to an external circuit ( (Not shown).

At this time, the end portion of each wiring pattern 117 is electrically connected to the wiring and electrode pattern 108 via the anisotropic conductive film 119 while the FPC 115 is fixed.

The protective resin layer 120.121 made of moisture-curing silicone resin applied around the pressure-bonding portion of the FPC 115 to the first transparent substrate 101 reinforces the adhesive force of the FPC 115 and the wiring / electrode pattern of the first transparent substrate 101. The upper protective resin layer 120 formed on the upper surface side of the first transparent substrate 101 is formed by coating with a dispenser or the like for the purpose of preventing sulfuration of the wiring pattern 107 of the FPC 115 and the FPC 115 and preventing migration, and the like. It is configured to be cured without being in contact with the substrate 104.

JP 2005-115728 A (Patent No. 4356416)

In the conventional touch panel sensor sheet module 90, heat that is heated and pressed through an anisotropic conductive film 95 such as ACF at the connection between the wiring terminal group of each transparent sheet 92 and the wiring terminal group on one end side of the FPC 96. After joining by pressure bonding, when the electrode terminal (input terminal) opposite to the transparent sheet 92 of the joined FPC 96 is inserted into the socket on the control board side of the controller IC and connected, the FPC 96 is bent. There is a problem that the electrode terminal (input terminal) of the FPC 96 is peeled off by twisting or pulling.

In short, when assembling the touch panel system module using the conventional touch panel sensor sheet module 90, when the electrode wiring (input side) is incorporated into the socket of the control board, sometimes a large load (tensile force and twisting force) is applied to the FPC 96. In addition, the electrode wiring of the FPC 96 joined to the electrode wiring of the transparent sheet 92 may be peeled off from the electrode wiring of the transparent sheet 92, which may cause a problem with the multi-touch function.

In order to prevent this, in the conventional touch panel sensor sheet module 100 disclosed in Patent Document 1, an example is proposed in which the front and back surfaces are solidified with a protective resin layer 120.121 made of silicone resin. However, the flexibility of the FPC 115 is impaired, and the overall thickness is difficult to control (for example, the height of the protective resin layer 120 should not exceed the height of the hard coat layer 107). When the front and back surfaces are hardened with the layer 120.121, it takes time to cure and the man-hour increases.

The present invention solves the above-mentioned conventional problems, has relatively good flexibility, does not require overall thickness management, and has little increase in new man-hours. To provide a touch panel sensor sheet module capable of ensuring connection reliability and preventing or suppressing occurrence of problems such as peeling during assembly after FPC bonding, and a method of manufacturing a touch panel system module using the same With the goal.

The touch panel sensor sheet module of the present invention includes a plurality of conductors arranged on a plane plate to create a position information signal, a first electrode connected to the conductor and arranged on the plane, A touch panel sensor sheet module comprising: a second electrode connected to the first electrode; and a flexible wiring board provided with wiring connected to the second electrode, the touch panel sensor sheet module comprising: The reinforcing material is attached so as to include at least the boundary portion with the flat plate, and thereby the above-described object is achieved.

In the touch panel sensor sheet module of the present invention, a plurality of conductors arranged on a flat plate are formed on the surface thereof, and a plurality of conductors arranged on a flat plate different from the flat plate are A second transparent sheet formed on the surface and laminated on the first transparent sheet so as to intersect a conductor formed on the surface of the first transparent sheet, and the first electrode includes the first electrode, It arrange | positions at each of a 1st transparent sheet and this 2nd transparent sheet, and is connected with this 2nd electrode by the anisotropic conductive film.

The reinforcing material in the touch panel sensor sheet module of the present invention is attached so as to cover the end of the flexible wiring board including the connection portion between the first electrode and the second electrode.

The reinforcing material in the touch panel sensor sheet module of the present invention is affixed to each of the two portions corresponding to the width direction of the flexible wiring board at the boundary portion.

The reinforcing material in the touch panel sensor sheet module of the present invention is pasted and interposed between the flexible wiring board and the flat plate.

The touch panel sensor sheet module of the present invention includes a plurality of conductors arranged on a plane plate to create a position information signal, and a first electrode connected to the conductor and arranged on the plane plate. A touch panel sensor sheet module comprising: a second electrode connected to the first electrode by an anisotropic conductive film; and a flexible wiring board provided with a wiring connected to the second electrode. The flexible wiring board has a first outer width portion and a second outer width portion connected to the first outer width portion, and the first outer width portion includes the first electrode and the first outer width portion. Including a region of the connection portion of the second electrode, including a region bonded to the flat plate by the anisotropic conductive film outside the region of the connection portion, and with respect to the second outer width portion The outer width is symmetrical and wide, and the above purpose is achieved. It is.

A first transparent sheet having a plurality of conductors formed on the surface thereof on the flat plate in the touch panel sensor sheet module of the present invention, and a plurality of conductors arranged on a flat plate different from the flat plate Formed on the surface of the first transparent sheet, and a second transparent sheet laminated on the first transparent sheet so as to intersect the conductor formed on the surface of the first transparent sheet. It arrange | positions at a 1st transparent sheet and this 2nd transparent sheet, respectively.

In the touch panel sensor sheet module of the present invention, at least one electric conductor connected to the first electrode passes through a region of the first outer width portion joined to the flat plate.

In the touch panel sensor sheet module of the present invention, a reinforcing material is pasted so as to include at least a boundary portion between the flexible wiring board and the flat plate.

In addition, the connection indicates that the connection is established, the connection indicates that the connection is electrically connected, and the connection indicates that the connection is not an electrical connection but an adhesion.

The touch panel sensor sheet module of the present invention has a first transparent sheet having a plurality of arranged conductive films formed on the surface thereof, and is laminated on the first transparent sheet so as to intersect the plurality of arranged conductive films. A second transparent sheet having a plurality of arranged conductive films formed on the surface thereof, and each anisotropic conductive film on each of a plurality of electrode wirings of the first transparent sheet and the plurality of arranged conductive films of the second transparent sheet. In the touch panel sensor sheet module in which the electrode wirings of the respective flexible wiring boards are respectively joined through the plurality of electrode wirings of the plurality of conductive films arranged in the first transparent sheet and the second transparent sheet, and the respective flexible wirings In order to reinforce each joint electrode wiring portion with the electrode wiring of the wiring board, the first transparent wiring board is at least from both sides in the width direction. Each sheet and the second transparent sheet, the transparent adhesive sheet of the predetermined width size is one that is attached respectively, the object can be achieved.

Also preferably, the transparent adhesive sheet in the touch panel sensor sheet module of the present invention is affixed to all or both sides in the width direction of the flexible wiring board.

Further preferably, the transparent adhesive sheet in the touch panel sensor sheet module of the present invention is provided between one of the flexible wiring boards and the first transparent sheet and between the other of the flexible wiring boards and the second transparent sheet. It is stuck in between.

More preferably, the dimension of the first transparent sheet and the second transparent sheet protruding from the respective flexible wiring boards in the touch panel sensor sheet module of the present invention to the sheet side is 2 mm to 20 mm on one side.

Further preferably, the thickness of the transparent adhesive sheet in the touch panel sensor sheet module of the present invention is 0.1 mm to 3 mm.

Furthermore, preferably, the outer width of the flexible wiring board including the region bonded and bonded via the anisotropic conductive film in the touch panel sensor sheet module of the present invention is wider than the outer width of the flexible wiring board connected to the flexible wiring board. It has become.

The touch panel sensor sheet module of the present invention has a first transparent sheet having a plurality of arranged conductive films formed on the surface thereof, and is laminated on the first transparent sheet so as to intersect the plurality of arranged conductive films. A second transparent sheet having a plurality of arranged conductive films formed on the surface thereof, and each anisotropic conductive film on each of a plurality of electrode wirings of the first transparent sheet and the plurality of arranged conductive films of the second transparent sheet. In the touch panel sensor sheet module in which the electrode wirings of the respective flexible wiring boards are respectively joined via each of these, the outer width of the flexible wiring board including the region to be joined and bonded via the anisotropic conductive film is connected to this. Therefore, the above-mentioned object is achieved.

Further, preferably, each electrode wiring joined as an effective wiring through the anisotropic conductive film is provided on the flexible wiring board portion which is symmetrically widened in the touch panel sensor sheet module of the present invention.

Further preferably, in the touch panel sensor sheet module of the present invention, the arrangement direction of the electrode wiring of at least one conductive film on each side of the plurality of conductive films arranged on the first transparent sheet and the second transparent sheet. Are arranged in the width direction of the flexible wiring board, and the electrode wiring of at least one conductive film on each side of each of the plurality of conductive films arranged in each flexible wiring board is corresponding to this. The electrode wiring is arranged in the width direction of each flexible wiring board by changing the arrangement direction and joined to each other.

Further preferably, the outer shape of the flexible wiring board in the touch panel sensor sheet module of the present invention is both wide portions that swell in a region including the widthwise front boundary line of the anisotropic conductive film in the protrusion width direction. Projects outward.

Furthermore, preferably, the symmetrical wide dimension in the touch panel sensor sheet module of the present invention extends from 1 mm to 30 mm on one side.

Furthermore, preferably, the outer width of the flexible wiring board in the touch panel sensor sheet module of the present invention is R-attached with a radius of 0.1 mm to 15 mm and connected by a curve with respect to the outer width connected to the flexible wiring board.

Further preferably, in the touch panel sensor sheet module of the present invention, each of the plurality of electrode wirings of the plurality of conductive films arranged in the first transparent sheet and the second transparent sheet and the electrode wiring of each flexible wiring board. A transparent adhesive sheet having a predetermined width size is attached to each of the first transparent sheet and the second transparent sheet from at least both sides in the width direction of each flexible wiring board so as to reinforce the bonding electrode wiring portion. Yes.

The touch panel system module manufacturing method of the present invention includes a step of manufacturing the touch panel sensor sheet module of the present invention, and an electrode terminal group on the control board side opposite to the flexible wiring board of the touch panel sensor sheet module inserted into a socket. Connecting the electrode terminal group to the electrode terminal group of the control board, thereby achieving the above object.

The operation of the present invention will be described below with the above configuration.

In the present invention, a plurality of conductive films arranged on the surface thereof are laminated on the first transparent sheet, and a plurality of conductive films arranged so as to intersect the plurality of arranged conductive films. Each flexible wiring board through each anisotropic conductive film to each of a plurality of electrode wirings of a second transparent sheet formed on the surface and a plurality of conductive films arranged on the first transparent sheet and the second transparent sheet. In the touch panel sensor sheet module in which the electrode wirings of each are joined, each joint electrode wiring part of the plurality of electrode wirings of the conductive film and the electrode wiring of each flexible wiring board arranged in the first transparent sheet and the second transparent sheet Each of the predetermined widths on the first transparent sheet and the second transparent sheet from at least both sides in the width direction of each flexible wiring board. Size of the transparent adhesive sheet is attached, respectively.

As a result, the flexibility is relatively good, the overall thickness management is unnecessary, and there is little increase in new man-hours, and high connection reliability between the transparent sheet on which the conductive film is formed and the FPC can be secured. It is possible to prevent or suppress the occurrence of problems such as peeling during assembly after FPC bonding.

As described above, according to the present invention, flexibility is relatively good, overall thickness management is easy, man-hours are not increased, and high connection reliability between the transparent sheet on which the conductive film is formed and the FPC is ensured. Therefore, it is possible to prevent or suppress the occurrence of problems such as peeling during assembly after FPC bonding.

It is a top view of the touch panel sensor sheet module in Embodiment 1 of the present invention. It is a perspective view which shows the example of fixation of the FPC junction part of the touch-panel sensor sheet module of FIG. FIG. 3 is a sectional view taken along line BB in FIG. FIG. 3 is a cross-sectional view taken along the line CC of FIG. It is a perspective view which shows the other example of fixation of the FPC junction part in the touchscreen sensor sheet module of Embodiment 2 of this invention. It is a perspective view which shows the further another example of fixation of the FPC junction part in the touchscreen sensor sheet module of Embodiment 3 of this invention. FIG. 7 is a sectional view taken along the line DD in FIG. 6. It is a top view which shows an example of the touchscreen sensor sheet module in Embodiment 4 of this invention. It is a perspective view which shows the example of fixation of the FPC junction part in the touchscreen sensor sheet module of FIG. It is a perspective view which shows the example of fixation of the FPC junction part in the touchscreen sensor sheet module of Embodiment 5 of this invention. It is a perspective view which shows the example of fixation of the FPC junction part in the touchscreen sensor sheet module of Embodiment 6 of this invention. It is a perspective view which shows the example of fixation of the FPC junction part in the touchscreen sensor sheet module of Embodiment 7 of this invention. It is a perspective view which shows the example of fixation of the FPC junction part in the touchscreen sensor sheet module of Embodiment 8 of this invention. It is a perspective view which shows the example of the FPC junction part of the conventional touch panel sensor sheet module. It is a top view of the conventional touch panel sensor sheet module currently indicated by patent documents 1. FIG. 16 is a sectional view taken along line AA in FIG.

1, 1B-1H Touch panel sensor sheet module 2 Cover glass 3, 4 Transparent sheet 3a, 4a Conductive film (electrode wiring) of transparent sheet
5 Protective film 6, 6D-6F Anisotropic conductive film 7, 7A, 7A ', 7D-7F FPC (flexible printed circuit board)
7a, 7Aa, 7A'a, 7Da-7Fa FPC transparent sheet joint side (output side)
7b, 7Ab, 7A'b, 7Db-7Fb FPC control board connection side (input side)
7c FPC conductive film 7A'd, 7Dd, 7Ed Wide part 7Fd Protruding wide part 8, 8B, 8C, 8G, 8H Transparent adhesive sheet (reinforcing material)
9 Sensor part (conductive film part)
aa 'FPC outer width of I / O routing wiring section bb' FPC outer width of output electrode wiring side

Hereinafter, embodiments 1 to 8 of a touch panel sensor sheet module of the present invention and a method of manufacturing a touch panel system module incorporating the same will be described in detail with reference to the drawings. In addition, each thickness, length, etc. of the structural member in each figure are not limited to the structure to illustrate from a viewpoint on drawing preparation. In addition, the first to eighth embodiments of the touch panel sensor sheet module and the touch panel system module manufacturing method incorporating the same according to the present invention can be variously modified within the scope of the claims. In other words, embodiments obtained by further combining technical means appropriately changed within the scope of the claims of the present application are also included in the technical scope of the present invention.

(Embodiment 1)
FIG. 1 is a plan view of a touch panel sensor sheet module according to Embodiment 1 of the present invention.

In FIG. 1, the touch panel sensor sheet module 1 of Embodiment 1 is configured by attaching a sensor sheet on a cover glass as a transparent substrate not shown here. As this sensor sheet, a transparent sheet 3 as a first transparent sheet on which a plurality of conductive films are formed and a transparent sheet 4 as a second transparent sheet thereon are bonded and laminated with an adhesive sheet. Each of the plurality of conductive films 3a and 4a of the transparent sheets 3 and 4 uses a metal having a low conductor resistance, such as Cu, Ag, Au, and Al, for the purpose of improving the reaction speed. The touch panel sensor sheet module 1 specifies the position of the designated coordinates (touch coordinates) by changing the capacitance of the transparent sheets 3 and 4. In short, a touch pen is applied to a sensor surface 9 (sensor sheet surface) composed of a plurality of conductive films 3a (for example, sense lines) in the vertical direction and a plurality of conductive films 4a (for example, drive lines) in the horizontal direction perpendicular thereto. A touch position is calculated and detected by a controller IC (not shown) by an instruction operation using an indicator such as a finger or a finger.

The touch panel system module of the first embodiment is configured by including a control board on which the controller IC is mounted on the touch panel sensor sheet module 1 of the first embodiment.

Each of the electrode wiring groups for external connection formed on each outer peripheral portion of the transparent sheet 3 formed with a plurality of conductive films 3a and the transparent sheet 4 formed with a plurality of conductive films 4a, respectively, FPCs 7 and 7A as flexible wiring boards are joined to each other. The joined FPCs 7 and 7A are electrically connected to a control board on which a controller IC (not shown) is mounted. Each of the transparent sheets 3 and 4 and the FPCs 7 and 7A are connected to each other by thermocompression bonding (pressure of about 10 N / cm) to be heated and pressurized through an anisotropic conductive film 6 such as an ACF (anisotropic conductive film) described later. The metal is joined with.

The bonding of the electrode terminal group (input terminal) and the extraction electrode group of the transparent sheets 3 and 4 on the transparent sheet bonding side 7a of the FPCs 7 and 7A as flexible wiring boards is not peeled off during the manufacturing process and the transporting process. The strip-like and tape-like transparent adhesive sheet 8 is affixed in a tape shape so as to cover the FPCs 7 and 7A in the width direction, and both ends thereof are affixed on the transparent sheets 3 and 4, respectively. The area where the transparent conductive sheet 8 is attached includes an area where the anisotropic conductive film 6 is disposed.

The touch panel system module manufacturing method according to the first embodiment includes a process of attaching the transparent adhesive sheet 8 according to the first embodiment across the width directions of the FPCs 7 and 7A and fixing them to the transparent sheets 3 and 4 respectively. The manufacturing process of the sheet module 1 and the process of inserting the electrode terminal group on the opposite side of the FPC 7 and 7A of the touch panel sensor sheet module 1 into the socket and connecting the electrode terminal group to the electrode terminal group of the control board. Yes.

The touch panel sensor sheet module 1 of the first embodiment will be described in more detail with reference to FIGS.

FIG. 2 is a perspective view showing an example of fixing the FPC joint in the touch panel sensor sheet module 1 of FIG. 3 is a cross-sectional view taken along line BB in FIG. 4 is a cross-sectional view taken along the line CC of FIG.

As shown in FIGS. 2 to 4, the touch panel sensor sheet module 1 according to the first embodiment will be described by paying attention to the FPC 7. The cover glass 2 and a plurality of conductive films 3a parallel to each other on the cover glass 2 are described. A transparent sheet 3 having an upper surface (for example, a sense line), a transparent sheet 4 having a plurality of conductive films 4a (for example, drive lines) parallel to each other on the transparent sheet 3, and a transparent sheet 4 The protective film 5 provided for surface protection on the plurality of conductive films 4a and the end portion of the upper surface of the transparent sheet 3 are exposed only in a predetermined region, and the plurality of conductive films 3a ( A plurality of anisotropic conductive films 6 disposed on a plurality of electrode lead portions (connection electrode groups) of a plurality of sense lines and a plurality of anisotropic conductive films 6 so as to correspond to the plurality of electrode lead portions. Conductive film 7c And FPC7 arranged as a connection electrode group (flexible wiring board), and a transparent adhesive sheet 8 covering the upper at a predetermined width so as to protrude from the width direction of the tape-shaped ends FPC7 predetermined distance in a strip shape. The transparent adhesive sheet 8 reinforces the FPC joint.

On the transparent sheet bonding side 7a of the FPC 7, a plurality of electrode lead portions (connection electrode group) respectively connected to the plurality of conductive films 3a of the transparent sheet 3 and a plurality of conductive films 7c (connection electrode group) of the FPC 7 The connection electrode groups are electrically bonded to each other by thermal pressure with the anisotropic conductive film 6 interposed between them. The control board side 7b of the FPC 7 is connected to the connection electrode group of the control board on which the controller IC is mounted.

In this way, the connection electrode wiring (connection) of the FPC 7 via the anisotropic conductive film 6 on the external connection electrode wiring (connection electrode group) on the outer peripheral portion of the transparent sheet 3 on which the plurality of conductive films 3a are formed. Electrode group; output terminal) is joined.

The anisotropic conductive film 6 is made of ACF (film-like), ACP (paste-like) or the like, and an appropriate member such as the size of conductive particles (gold particles) depending on the pitch of the connection electrode wiring (connection electrode group). Is selected. Basically, the anisotropic conductive film 6 has a width substantially equal to or slightly larger than the outer width (the width direction is the lateral direction in the drawing) of the FPCs 7 and 7A on the outer peripheral portions of the transparent sheets 3 and 4. The anisotropic conductive film 6 is at least a region that covers the connection electrode terminal portion (connection electrode group) from end to end. Only the conductive particles (gold particles) of ACF existing between the upper and lower connection electrode terminals are crushed by thermocompression bonding, and the upper and lower connection electrode terminals become conductive, but the ACF in the portion other than between the upper and lower connection electrode terminals Since the periphery of the conductive particles (gold particles) remains covered with the insulating material, the conductive particles (gold particles) remain stationary. In this manner, the connection electrode wiring (output terminal) of the FPC 7 is joined to the external connection electrode wiring on the outer peripheral portion of the transparent sheet 3 via the anisotropic conductive film 6.

A transparent adhesive sheet 8 (reinforcing material) is pasted so as to cover the upper surface corresponding to the joint portion of the FPC 7. For the transparent sheets 3 and 4, a PET material is mainly used, and the conductive films 3a and 4a are formed through an adhesive layer. In the first embodiment, a transparent adhesive sheet 8 (reinforcing material) that is also used as an adhesive layer for the transparent sheets 3 and 4 of the touch panel sensor sheet module 1 is used for connection as a reinforcement measure that peels off on the joints of the FPCs 7 and 7A. Affixed to the FPCs 7 and 7A corresponding to the electrode terminal area, respectively, and fixed to the FPCs 7 and 7A.

In this touch panel sensor sheet module 1, since PET is used for the transparent sheets 3 and 4, the transparent sheets 3 and 4 are deformed or dissolved when heated to about 180 degrees Celsius to about 200 degrees Celsius like the liquid crystal module. Resulting in. Therefore, in the touch panel sensor sheet module 1, the anisotropic conductive film 6 for low-temperature connection at 150 degrees Celsius or less is used.

As described above, the electrode terminal group (input terminal) and the transparent sheet on the transparent sheet bonding side 7a of the FPC 7, 7A using the anisotropic conductive film 6 for low-temperature connection at about 150 degrees Celsius or less as described above. 3 and 4 lead electrode groups are joined, and the electrode terminal group (input terminal) on the control board side 7b opposite to the FPC 7 and 7A is inserted into the socket and connected to the electrode terminal group (input terminal) on the control board. To do. The FPCs 7 and 7A are bent to the side opposite to the cover glass 2 side (the upper side in FIG. 2) to assemble the touch panel system module. By touching the cover glass 2 side, the touch position is calculated and detected by the control board.

In order to ensure high connection reliability between the FPC 7 and the transparent sheet 3 on which such a plurality of conductive films 3a are formed, a highly adhesive member is used for the anisotropic conductive film 6 by low-temperature bonding. Is ideal, but when it is not possible, a transparent sheet (PET) that is also used in the touch panel sensor sheet module 1 and a double-sided adhesive sheet called OCA (Optical Clear Adhesive) are superimposed on it By sticking the transparent adhesive sheet 8 (reinforcing material), high connection reliability between the transparent sheet 3 on which the conductive film 3a is formed and the FPC 7 can be secured, and the FPC 7 joint at the time of assembly after the FPC 7 is joined. It is possible to prevent or suppress the occurrence of problems such as peeling off.

This transparent pressure-sensitive adhesive sheet 8 (reinforcing material) is composed of a sheet obtained by sticking a double-sided adhesive OCA on a film-like PET material. Regarding the protruding size of the transparent adhesive sheet 8 (reinforcing material) from the FPC 7, it is desirable that the transparent sheet 3 and the electrode terminal group of the FPC 7 (outer shape of the FPC 7) protrude by 2 to 20 mm on one side. If the protruding amount on one side of the transparent adhesive sheet 8 is less than 2 mm, the FPC 7 is easily peeled off when the peeling stress of the FPC 7 is applied, and the FPC 7 is easily peeled off. Conversely, the protruding size of the transparent adhesive sheet 8 from the FPC 7 is If it is 20 mm, sufficient peel prevention strength can be secured. Therefore, when the protruding size of the transparent adhesive sheet 8 from the FPC 7 exceeds 20 mm, the size of the transparent adhesive sheet 8 (reinforcing material) becomes large, and the transparent adhesive sheet 8 (reinforcement) has a sufficient strength for preventing peeling. The cost of the material itself increases.

Also, the thickness of the transparent adhesive sheet 8 (reinforcing material) is preferably 0.1 to 3 mm. If the thickness of the transparent pressure-sensitive adhesive sheet 8 (reinforcing material) is less than 0.1 mm, the FPC 7 is easily peeled off without ensuring the strength to prevent the FPC 7 from peeling off, and the thickness of the transparent pressure-sensitive adhesive sheet 8 (reinforcing material) is 3 mm or more. When the curved portion of the FPC 7 is applied even by several millimeters, the FPC 7 becomes difficult to bend, and the thickness of the sticking portion of the transparent adhesive sheet 8 (reinforcing material) increases as a module, which also affects the thickness of the housing.

Such reinforcement by the transparent adhesive sheet 8 makes it possible to prevent or suppress a problem that the FPC 7, 7A is peeled off when the module is assembled. The transparent adhesive sheet 8 (reinforcing material) is particularly effective against the stress that the FPCs 7 and 7A are twisted and peeled off from the ends.

As described above, according to the first embodiment, the FPC 7, 7A is covered with the transparent adhesive sheet 8 (reinforcing material) in the width direction to reinforce the joint portion of the FPC 7, 7A. Thereby, high connection reliability between the transparent sheets 3 and 4 on which the conductive films 3a and 4a are formed and the FPCs 7 and 7A can be secured. After the FPCs 7 and 7A are joined to the transparent sheets 3 and 4, the FPC 7 , 7A can be prevented or suppressed from occurring. In addition, by using the transparent adhesive sheet 8 (reinforcing material) on top of the transparent sheet (PET) used as a member of the touch panel sensor sheet module 1 and the OCA, the risk can be reduced by arranging new materials. In addition, a transparent sheet (PET) used as an enlargement and a piece of OCA member can be used, and the member can be used efficiently. Since the transparent adhesive sheet 8 (reinforcing material) is transparent, there is also an advantage that the state of the joint portion of the FPCs 7 and 7A can be confirmed even after the transparent adhesive sheet 8 (reinforcing material) is attached.

As a result, the flexibility is relatively good, the overall thickness control is not required, and the number of man-hours is not increased as in the prior art, and the transparent sheets 3 and 4 on which the conductive films 3a and 4a are formed and the FPCs 7 and 7A Connection reliability can be ensured, and problems such as peeling of the FPCs 7 and 7A during assembly after FPC bonding can be prevented or suppressed.

Although not particularly described in the first embodiment, the transparent adhesive sheet 8 (reinforcing material) will be described in the later-described embodiment, but is not fixed to the strip shape in plan view as shown in the figure, Various shapes (for example, circular and elliptical shapes) can be assumed. An example of this is shown in the second embodiment.

(Embodiment 2)
In the first embodiment, the FPCs 7 and 7A are fixed by covering the upper sides of the FPCs 7 and 7A with the strip-like transparent adhesive sheet 8 (reinforcing material) in the width direction and pasting them on the transparent sheets 3 and 4, respectively. However, in the second embodiment, two wing-shaped transparent adhesive sheets 8B (reinforcing materials), which will be described later, are applied to the transparent sheets 3 and 4 from both ends in the width direction on the FPCs 7 and 7A, respectively. A case will be described in which the FPCs 7 and 7A are fixed by pasting them.

FIG. 5 is a perspective view showing an example of fixing the FPC joint in the touch panel sensor sheet module 1B according to the second embodiment of the present invention. In FIG. 5, the same reference numerals are given to the structural members that exhibit the same effects as the structural members in FIGS.

In FIG. 5, in the touch panel sensor sheet module 1B according to the second embodiment, two transparent adhesive sheets 8B (reinforcing materials) are used as reinforcement measures for the FPC joints of the FPCs 7 and 7A, and transparent from both ends of the FPC 7 in the width direction joint. Affixing each on the sheet | seat 3 fixes the FPC junction part of FPC7. Similarly, the FPC joint portion of the FPC 7A is fixed by sticking on the transparent sheet 4 from both ends in the width direction joint portion of the FPC 7A. Here, two wing-like transparent adhesive sheets 8B (reinforcing materials) are attached only to the portions where the FPCs 7A start to peel off. The plane shape of the two wing-like transparent adhesive sheets 8B is wide on the FPC 7, 7A side, the transparent sheets 3 and 4 side are configured to have a narrow width, and are connected linearly from the narrow side to the wide side, You may connect with the curve by giving R of predetermined radius. Further, the planar shape of the two wing-like transparent adhesive sheets 8B may be formed in an L shape or an inverted L shape, and one side of the L shape is attached to the FPC 7, 7A side, One side outside that is not bent is positioned so as to face the sensor unit 9 side. The outer shape of one side inside the bent portion is formed by a curve or an oblique line so that the bent portion between one side of the L shape or the inverted L shape is wide.

With respect to the transparent adhesive sheet 8B (reinforcing material), it is not necessary to cover all the upper surfaces corresponding to the electrode terminal portions (electrode terminal group) of the FPC 7 in the width direction as in the transparent adhesive sheet 8 of the first embodiment. It may be a wing-shaped reinforcing material that is divided into two parts so that a partial region at both ends of the terminal region and the transparent sheet 3 are covered with the transparent adhesive sheet 8B. The wing-like transparent adhesive sheet 8B is configured such that the FPC 7 side is wide and the transparent sheet 3 side is narrow, and this is stronger in terms of reinforcement strength, and the joint portion of the FPC 7 is difficult to peel off due to torsional stress. In this wing-like transparent adhesive sheet 8B, the width and the width are connected by a straight line only on one side, but the width and the width may be connected by a straight line on both sides. R may be attached to the narrow side from one side or both sides and connected by a curve.

The transparent adhesive sheet 8B (reinforcing material) is a sheet in which a double-sided adhesive OCA is bonded to a transparent PET material, and its application area seems to protrude 2 to 20 mm on one side from the electrode wiring portion of the transparent sheet 3 and the FPC 7. A desirable size is desirable. If the protruding amount on one side of FPC7, 7A is less than 2 mm, the effect is not expected when peeling stress is applied to FPC7, 7A, and it is easy to peel off. Conversely, if the protruding amount on one side of FPC7, 7A is 20 mm, peeling is prevented Enough strength can be secured. When the protruding amount on one side of the FPCs 7 and 7A exceeds 20 mm, the size of the transparent adhesive sheet 8B (reinforcing material) increases, and the material cost of the transparent adhesive sheet 8B (reinforcing material) itself increases.

Also, the thickness of the transparent adhesive sheet 8B (reinforcing material) is preferably 0.1 to 3 mm. If the thickness of the transparent pressure-sensitive adhesive sheet 8B (reinforcing material) is less than 0.1 mm, the FPC 7, 7A will not be able to secure the strength to prevent peeling, and the thickness of the transparent pressure-sensitive adhesive sheet 8B (reinforcing material) will be 3 mm or more. When the curved part of 7A is applied even by several millimeters, it becomes difficult to bend, and the thickness of the sticking part of the transparent adhesive sheet 8B (reinforcing material) increases as a module, which also affects the casing thickness.

The difference between the transparent adhesive sheet 8B of the second embodiment and the transparent adhesive sheet 8 of the first embodiment is that the upper surface of the transparent adhesive sheet (reinforcing material) corresponding to the electrode wiring for FPC connection is in the width direction as shown in FIG. In the transparent adhesive sheet 8B (reinforcing material) instead of the single transparent adhesive sheet 8 (reinforcing material) that is entirely covered, the two sides of the FPCs 7 and 7A are divided into two in a wide wing shape on the FPC 7 and 7A side. It is reinforced. The transparent pressure-sensitive adhesive sheet 8B (reinforcing material) increases the number of steps, but the total size of the transparent pressure-sensitive adhesive sheet 8B (reinforcing material) can be reduced. The area covering the FPC 7 and 7A corresponding to the FPC connection electrode wiring in the width direction is preferably about 1 to 5 mm. If it is less than this range, the fixing effect is poor, and if it is larger than this range, the fixing effect is excessive and the material cost is increased.

As described above, according to the second embodiment, the two wing-like transparent adhesive sheets 8B (reinforcing materials) having a small size prevent or suppress a problem that the FPC 7 or 7A is peeled off due to a load applied when the module is assembled. Is possible. The transparent adhesive sheet 8B (reinforcing material) is particularly effective against the stress that the FPCs 7 and 7A are twisted and peeled off from the ends.

As a result, the flexibility is relatively good, the overall thickness control is unnecessary, and the number of man-hours is not increased as in the prior art, and the high transparency between the transparent sheets 3 and 4 on which the conductive films 3a and 4a are formed and the FPCs 7 and 7A. Connection reliability can be ensured, and problems such as peeling of the FPCs 7 and 7A during assembly after FPC bonding can be prevented or suppressed.

(Embodiment 3)
In the first and second embodiments, the transparent adhesive sheets 8 and 8B (reinforcing materials) having different planar shapes in a tape shape and a wing shape have been described as the single-sided adhesive fixing material. With the transparent adhesive sheet 8C (reinforcing material), the FPCs 7 and 7A are respectively interposed between the width direction both ends other than the joints of the FPCs 7 and 7A and the regions other than the joints of the transparent sheets 3 and 4, respectively. The case where it sticks to 4 and is fixed is demonstrated.

FIG. 6 is a perspective view showing another example of fixing the FPC joint portion in the touch panel sensor sheet module 1C according to the third embodiment of the present invention. In FIG. 6, the same reference numerals are given to the structural members that exhibit the same effects as the structural members in FIGS.

In FIG. 6, in the touch panel sensor sheet module 1 </ b> C of Embodiment 3, a double-sided adhesive transparent adhesive sheet 8 </ b> C (reinforcing material) is pasted as a reinforcing measure on the joint surface (back surface) of the FPC 7 with the anisotropic conductive film 6. ing.

This transparent adhesive sheet 8C (reinforcing material) does not require a transparent PET material, and the OCA of the double-sided adhesive sheet is interposed between the FPCs 7 and 7A and the adhesive sheets 3 and 4 like a double-sided tape. Is pasted. As shown in FIG. 7, the adhesive region of the transparent adhesive sheet 8C (reinforcing material) is on both sides of the FPC 7 on which the plurality of conductive films 7c are not formed. May be covered). The arrangement of the transparent adhesive sheet 8C is desirably a width W within a range of 2 mm width to 5 mm width (FPC width direction) where there is no effective terminal from the FPC outer edge. If the width W of the transparent adhesive sheet 8C is less than 2 mm, the reinforcement is weak in strength, and if the width W of the transparent adhesive sheet 8C exceeds 5 mm, it covers the effective terminals arranged in the center. The safety standard for peeling of the thermocompression bonding part is a stress of 5 N (Newton) / cm. In addition, the safety standard for peeling of the reinforcing part is set to withstand the stress of 5 N / cm. Here, it is set to withstand a stress of 10 N / cm in total.

Regarding the thickness of the transparent adhesive sheet 8C (reinforcing material), 0.1 to 0.3 mm is desirable. When the thickness of the transparent adhesive sheet 8C (reinforcing material) is less than 0.1 mm, it is difficult to ensure the peeling prevention strength, and the FPC 7.7A is easily peeled off, and when the thickness of the transparent adhesive sheet 8C (reinforcing material) exceeds 0.3 mm. There is a concern that the pressure of the pressure-bonding tool does not become uniform at the time of the pressure-sensitive adhesive sticking out and thermocompression bonding through the anisotropic conductive film 6.

As described above, according to the third embodiment, by providing the double-sided adhesive transparent adhesive sheet 8C (reinforcing material) on both sides of the FPCs 7 and 7A and between the FPCs 7 and 7A and the adhesive sheets 3 and 4, Even if stress is applied to the FPCs 7 and 7A when the modules are assembled, it is possible to prevent or suppress a problem that the FPCs 7A are peeled off. The transparent adhesive sheet 8C (reinforcing material) is particularly effective against the stress that the FPCs 7 and 7A are twisted and peeled off from the ends.

As a result, the flexibility is relatively good, the overall thickness control is unnecessary, and the number of man-hours is not increased as in the prior art, and the high transparency between the transparent sheets 3 and 4 on which the conductive films 3a and 4a are formed and the FPCs 7 and 7A. Connection reliability can be ensured, and problems such as peeling of the FPCs 7 and 7A during assembly after FPC bonding can be prevented or suppressed.

In the third embodiment, two transparent adhesive sheets 8C (reinforcing material) are interposed between both sides of the joints of the FPCs 7 and 7A and both sides of the joints of the transparent sheets 3 and 4, respectively. Although the case where each was stuck and fixed to the transparent sheets 3 and 4 was demonstrated, not only this but this embodiment may be used with the transparent adhesive sheet 8 or 8B of the said Embodiment 1 or 2. FIG.

(Embodiment 4)
In the first to third embodiments, the case where the transparent adhesive sheet 8, 8B or 8C as the reinforcing plate is used to prevent the FPC 7, 7A from peeling off is described. In the following fourth to sixth embodiments, the transparent adhesive sheet 8 is used. , 8B or 8C will not be used, and the case where the FPC 7 or 7A itself has a peeling prevention structure will be described.

FIG. 8 is a plan view showing an example of a touch panel sensor sheet module according to Embodiment 4 of the present invention. FIG. 9 is a perspective view showing an example of fixing the FPC joint portion in the touch panel sensor sheet module 1D of FIG. 8 and 9, the same reference numerals are given to the structural members that exhibit the same effects as the structural members in FIGS. 1 and 2, and the description thereof is omitted.

8 and 9, in the touch panel sensor sheet module 1D according to the fourth embodiment, the external connection electrode wirings on the outer periphery of the transparent sheets 3 and 4 on which the conductive films 3a and 4a orthogonal to each other are formed are respectively provided. The electrode wiring for FPC connection (output side) is joined via the anisotropic conductive film 6D. The transparent sheets 3 and 4 are mainly made of a PET material. The transparent sheet 3 is formed with a conductive film 3a through an adhesive layer, and the transparent sheet 4 on the transparent sheet 3 is conductive through the adhesive layer. A film 4a is formed. For the anisotropic conductive film 6D, ACF / ACP or the like is used, and an appropriate member such as the size of the conductive particles is selected according to the pitch of the connection electrode wiring. Basically, the anisotropic conductive film 6D has substantially the same width as the outer width of the FPC 7D on the outer periphery of the transparent sheets 3 and 4 (the width direction is the horizontal direction in the drawing). The wiring part is covered. Since the FPC joint uses PET material instead of glass like a liquid crystal module, the substrate is deformed and melted together with the transparent sheets 3 and 4 especially when heated to about 180 to 200 degrees Celsius. There is a risk. Therefore, in the touch panel sensor sheet module 1D, an anisotropic conductive film 6D for low-temperature connection that can be bonded at 150 degrees Celsius or less is used.

In the fourth embodiment, the FPC outer shape (output electrode wiring side 7Da) width bb ′ of the portion to be joined is wider than the FPC outer width aa ′ of the portion routed to the input electrode wiring side 7Db. ing. Here, the effective wiring and the dummy wiring are not installed in the wide portion 7Dd “(b−b ′) − (aa ′)” protruding outward. The left and right wide portions 7Dd of the FPC 7D and the transparent sheet 3 are firmly bonded with an adhesive resin material of the anisotropic conductive film 6D.

The FPC outer shape (output electrode wiring side) width bb ′ of the portion joined by the anisotropic conductive film 6D is 5 to 30 mm from the FPC outer width aa ′ of the portion routed to the input electrode wiring side 7Db. Desirably only wide. If it is one side of the left and right wide portions 7Dd, the shape will be 2.5 to 15 mm wide. If one side of the wide left and right wide portion 7Dd that protrudes wide is less than 2.5 mm, the effect of improving the bonding strength is small. Conversely, if one side of the wide left and right wide portion 7Dd that protrudes wide is 15 mm, the effect of improving the bonding strength Is sufficient, and if one side of the wide and protruding left and right wide portions 7Dd exceeds 15 mm, the size of the FPC 7D becomes unnecessarily large, and the metal tool for crimping at the time of heat-pressure bonding also becomes large, so that the joining uniformity There are other issues, such as securing security.

Further, the FPC outer shape width (the output electrode wiring side of the transparent sheet bonding side 7Da) width bb ′ of the portion bonded by the anisotropic conductive film 6D is the FPC outer width of the portion led to the input electrode wiring side 7Db. It is desirable to attach an outer shape R having a radius of 0.5 to 15 mm to an outer shape portion that is wider than aa ′. In short, a wide and protruding FPC outer shape (output electrode wiring side on the transparent sheet bonding side 7Da) from the width bb ′ to the narrow FPC outer width aa ′ is curved (radius R0.5 mm to radius R15 mm). ). This is because when assembling as a touch panel sensor sheet module 1D, an electrode wiring group (input electrode wiring side of the control board connection side 7Db) is incorporated into a control board socket or the like, and sometimes a large load is applied. When a twisting force is applied to the joint portion via the membrane 6D, the base material of the FPC 7D itself may be torn unless it is R-attached.

In this way, the FPC 7D having a wide protruding FPC outer shape (output electrode wiring side) width bb ′ is made of a plurality of conductive sheets of the transparent sheet 3 with an anisotropic conductive film 6D that is equal to or longer than this. In addition to being joined to the connection electrode group at the tip of the body 3a, the area to which the left and right wide portions 7Dd are attached is increased, so that the joining strength is reinforced and high connection reliability can be ensured. .

Each FPC outer shape (output electrode wiring side) of the portion joined to the transparent sheets 3 and 4 is wider than the FPC outer width aa ′ of the portion routed to the input electrode wiring side 7Db. This is the characteristic configuration of the fourth embodiment. The outer width of the FPC connected by a connector or the like is not particularly limited. Although the outer shape of the wide FPC portion will be described later in Embodiment 5, it is not fixed to the shape shown in this figure, and various shapes can be assumed as the outer shape of the FPC.

As described above, according to the fourth embodiment, the outer width of the FPC 7D including the bonding portion bonded and bonded through the anisotropic conductive film 6D and the entire region of the bonding portion (or a partial region, here, the entire region). bb ′ has a width that is symmetric with respect to the outer width aa ′ connected thereto, and protrudes from both sides as a left and right wide portion 7Dd.

As a result, the left and right wide portions 7Dd of the FPC 7D and the transparent sheet 3 are bonded and bonded together by the anisotropic conductive film 6D, and the left and right wide portions 7A'd and the transparent sheet 4 of the FPC 7A ′ are bonded to the anisotropic conductive film. By bonding and bonding by 6D to reinforce the joint, the flexibility is relatively good and the overall thickness control is easy, and there is no increase in man-hours as in the prior art, and conductive films 3a and 4a are formed. High connection reliability between the formed transparent sheets 3 and 4 and the FPC 7D can be secured, and occurrence of problems such as peeling of the FPC 7D during assembly after FPC bonding can be suppressed.

(Embodiment 5)
In Embodiment 4 described above, the FPC outer shape (output electrode wiring side 7Da) is wider than the FPC outer width of the portion routed to the input electrode wiring side 7Db and protrudes in both outward directions. Although the case where the length of the conductive film 6D is configured to be long to widen the region of the anisotropic conductive film 6D has been described, in the fifth embodiment, the FPC outer width is wide at the connection electrode portion and protrudes in both outward directions. Are the same, but at least one of both sides of the plurality of conductive films 7c in the FPC 7E is bent outward in both directions and arranged to the tip, and the plurality of conductives of the transparent sheet 3 are corresponding to this. A case will be described in which at least one of both sides of the film 3a is bent inwardly and bonded to each other with an anisotropic conductive film 6E interposed therebetween.

FIG. 10 is a perspective view showing a fixing example of the FPC joint portion in the touch panel sensor sheet module 1E according to the fifth embodiment of the present invention. In FIG. 10, the same reference numerals are given to the structural members that exhibit the same effects as the structural members in FIGS. 8 and 9, and descriptions thereof are omitted.

In FIG. 10, in the touch panel sensor sheet module 1E of the fifth embodiment, the FPC outer shape (output electrode wiring side of the transparent sheet bonding side 7Ea) width b of the portion bonded to the transparent sheets 3 and 4 as in the fourth embodiment. -B 'is wider than the FPC outer width aa' of the portion routed to the input electrode wiring side of the control board connection side 7Eb. The difference between the touch panel sensor sheet module 1E of the fifth embodiment and the fourth embodiment is that the FPC portion “(bb ′)-(aa ′)” that is wide is left and right and the transparent sheet 3 in the horizontal direction 3 And FPC7E are provided with effective wirings to be joined. In short, the outer width of the FPC 7E is wide on the connection electrode portion side and protrudes in both outward directions as in the case of the fourth embodiment, but at least one of each of the two conductive films 7c in the FPC 7E is provided on both sides. Two (here, two) conductive films 7c1 are bent to both ends and arranged to the tip, and at least one of each of the two conductive films 3a of the transparent sheet 3 (here) In this case, the two conductive films 3a1 are bent inwardly and arranged in the lateral direction, and the left and right wide portions 7Dd of the lateral FPC 7D and the transparent sheet 3 are bonded to each other by the anisotropic conductive film 6D. The anisotropic conductive film 6E is interposed therebetween so as to be bonded to each other. As a result, it is possible to alleviate the displacement of the arrangement due to the narrow pitch between the plurality of effective wires and the thermal contraction.

The FPC outer shape (output electrode wiring side) width bb ′ of the portion joined by the anisotropic conductive film 6E is 5 to 30 mm larger than the FPC outer width aa ′ of the portion routed to the input electrode wiring side. Wide within the range is desirable. The FPC outer shape (output electrode wiring side) width bb ′ is wider than the FPC outer width aa ′ of the portion routed to the input electrode wiring side of the control board connection side 7Eb. An outer shape R of 0.5 mm to 15 mm is desirable. These are the same as those in the first embodiment described above.

When effective wiring in the lateral direction (here, two wires on each side) is provided in the wide end portion of the outer shape of the FPC 7E, the electrode wirings of the transparent sheets 3 and 4 have the FPC outer shape bonded by the anisotropic conductive film 6E. Each electrode wiring of the transparent sheets 3 and 4 is routed so as to correspond to both sides. The merit in this case is that each electrode wiring pitch on the transparent sheets 3 and 4 side can be increased (in the case of the same number of outputs), and the electrode wiring is drawn out from both sides of the FPC outer shape, so that pressure bonding at the time of heating and pressure bonding It is also possible to suppress the accumulated pitch deviation of the conductive wiring with respect to the extension in the tool direction. Furthermore, the electrode wiring on the transparent sheets 3 and 4 can be covered with the anisotropic conductive film 6E or a protective insulating material (PET or the like), thereby preventing the short circuit. As a result, this specification enables the touch panel sensor sheet module 1E having high connection reliability and effective for wiring design.

As described above, according to the fifth embodiment, each electrode wiring joined as an effective wiring through the anisotropic conductive film 6E is provided in the FPC portion that is widened symmetrically. That is, the arrangement direction in the electrode wiring of at least one (here, two) conductive films 3a and 4a on each side of the plurality of conductive films 3a and 4a arranged on the transparent sheets 3 and 4 is changed from the others. The FPCs 7E and 7A ′ are arranged in the width direction, and at least one (two in this case) on each side of the plurality of conductive films 3a and 4a arranged in the FPCs 7E and 7A ′ is corresponding to the FPCs 7E and 7A ′. The electrode wirings of the conductive films 3a and 4a are arranged in the width direction of the respective FPCs 7E and 7A ′ by changing the arrangement direction of the electrode wirings of the conductive films 3a and 4a, and are joined to each other.

As a result, the flexibility is relatively good, the overall thickness can be easily managed, and there is no increase in man-hours as in the prior art, and high connection reliability between the transparent sheet on which the conductive film is formed and the FPC can be secured. It is possible to suppress the occurrence of problems such as peeling during assembly after FPC bonding.

(Embodiment 6)
In Embodiment 4 described above, the FPC outer shape (output electrode wiring side 7Da) is wider than the FPC outer width of the portion routed to the input electrode wiring side 7Db and protrudes in both outward directions. Although the case where the length of the conductive film 6D is configured to be long and the area of the anisotropic conductive film 6D is increased in area has been described, in the sixth embodiment, the widthwise front boundary line of the anisotropic conductive film 6F A case will be described in which the outer shape of the FPC on the region including the portion (the portion to which the peeling force is first applied) protrudes outward from the joint portion as the protruding wide portion 7Fd which is the protruding wide FPC portion.

FIG. 11 is a perspective view showing an example of fixing the FPC joint portion in the touch panel sensor sheet module 1F according to the sixth embodiment of the present invention. In FIG. 11, the same reference numerals are given to the structural members that exhibit the same effects as the structural members in FIGS. 8 and 9, and description thereof is omitted.

In FIG. 11, in the touch panel sensor sheet module 1F of the sixth embodiment, the FPC outer shape (transparent sheet bonding side 7Fa on the output electrode wiring side) width bb ′ of the portion bonded to the transparent sheets 3 and 4 is the control board. Although it is wider than the FPC outer width aa ′ of the portion led to the input electrode wiring side of the connection side 7Fb, all the joint portions are not wide, and the front boundary line in the drawing of the anisotropic conductive film 6F is shown. The characteristic configuration is that the FPC shape on the including region (the portion where the peeling force is first applied) swells to the wide portion 7Fd of the protruding wide FPC portion. In the protruding wide portion 7Fd “(bb ′) − (aa ′)”, which is the protruding wide FPC portion, neither effective wiring nor dummy wiring is installed.

The FPC outer shape (output electrode wiring side) width bb ′ of the bonding portion bonded by the anisotropic conductive film 6F is 1 to 15 mm from the FPC outer width aa ′ of the portion routed to the input electrode wiring side. It is desirable to make it wide. Further, the outer peripheral portion where the FPC outer shape (output electrode wiring side) width bb ′ becomes wider than the FPC outer width aa ′ of the portion routed to the input electrode wiring side has a radius of 0.1. It is desirable to attach an outer shape R of ˜5 mm. Although the effect for improving the FPC bonding strength is less than that of the above-described Embodiments 4 and 5, if the bulging protrusion-shaped portion is too wide, when bonding to the transparent sheet via the anisotropic conductive film 6F The protrusions may be bent and cause problems in joining, but the swelled wide portions 7Fd are used to reduce this.

As described above, according to the sixth embodiment, the outer shape of the FPC 7F protrudes outward on both sides as the wide portion 7Fd that swells on the region including the widthwise front boundary line of the anisotropic conductive film 6F. ing.

As a result, the flexibility is relatively good, the overall thickness can be easily managed, and there is no increase in man-hours as in the prior art, and high connection reliability between the transparent sheet on which the conductive film is formed and the FPC can be secured. It is possible to suppress the occurrence of problems such as peeling during assembly after FPC bonding.

(Embodiment 7)
In Embodiment 7, as shown in FIG. 2 of Embodiment 1 above the protruding wide portion 7D of FIG. 9 of Embodiment 4, the strips are formed so that both ends protrude a predetermined distance from the width direction of the FPC 7D. The case where the transparent adhesive sheet 8G which covers an upper part with predetermined width is affixed is demonstrated. In short, the seventh embodiment is a case where the contents of the first embodiment are combined with the fourth embodiment.

FIG. 12 is a perspective view illustrating an example of fixing the FPC joint portion in the touch panel sensor sheet module 1G according to the seventh embodiment of the present invention. In FIG. 12, the same reference numerals are given to the structural members that exhibit the same effects as the structural members in FIGS. 2 and 9, and the description thereof is omitted.

In FIG. 12, in the touch panel sensor sheet module 1F of the sixth embodiment, the outer width bb ′ of the FPC 7D including the entire region of the bonding portion bonded via the anisotropic conductive film 6D is connected to the outer shape. A wide portion 7Dd that is symmetrical and wider than the width aa ′ is provided. Similarly, the outer width bb ′ of the FPC 7A ′ including the entire region of the bonding portion bonded via the anisotropic conductive film 6D is symmetrical and wider than the outer width aa ′ connected thereto. Wide portion 7A'd is provided.

In the touch panel sensor sheet module 1F of the sixth embodiment, a plurality of electrode wirings of the conductive films 3a and 4a arranged at the peripheral surface exposed portions of the transparent sheets 3 and 4 stacked vertically and the FPCs 7D and 7A ′ The FPC 7D and 7A ′ (FPC 7D) to the transparent sheet 3 and the other FPC 7D and 7A ′ to the other (FPC 7A ′) so as to further fix each junction electrode wiring portion with the electrode wiring of the plurality of conductive films 7c arranged. ) To the transparent sheet 4, the transparent adhesive sheets 8G of predetermined sizes are respectively pasted.

As described above, according to the seventh embodiment, the transparent adhesive sheet 8G that covers the wide portion 7Dd of the FPC 7D and the transparent adhesive sheet 8G that covers the wide portion 7A'd of the FPC 7A ′ are used in the first and fourth embodiments. Compared to the above, the joint portion is more firmly fixed, and the peeling of the FPCs 7D and 7A ′ can be prevented more reliably.

(Embodiment 8)
In the eighth embodiment, the double-sided adhesive transparent adhesive sheet 8C (reinforcing material) is provided between the protruding wide portion 7Dd of FIG. 9 of the fourth embodiment and the transparent sheet 3, as shown in FIG. 6 of the third embodiment. ), A case where both sides are pasted with a double-sided adhesive sheet 8H (reinforcing material) interposed therebetween will be described. In short, the case where the content of the third embodiment is combined with the fourth embodiment is the eighth embodiment.

FIG. 13 is a perspective view showing an example of fixing the FPC joint portion in the touch panel sensor sheet module 1H according to the eighth embodiment of the present invention. In FIG. 13, the same reference numerals are given to the structural members that exhibit the same effects as the structural members in FIGS. 6 and 9, and the description thereof is omitted.

In FIG. 13, in the touch panel sensor sheet module 1H according to the eighth embodiment, the outer width bb ′ of the FPC 7D including the entire region of the joint portion joined via the anisotropic conductive film 6D on the transparent sheet 3 is the same. A wide portion 7Dd which is symmetrical and wider than the outer width aa ′ connected to is protruded on both sides. Similarly, the outer width bb ′ of the FPC 7A ′ including the entire region of the bonding portion bonded via the anisotropic conductive film 6D on the transparent sheet 4 is larger than the outer width aa ′ connected thereto. Also, a wide portion 7A'd that is symmetrical and wide is provided so as to protrude on both sides.

In the touch panel sensor sheet module 1F of the eighth embodiment, a plurality of electrode wirings of the conductive films 3a and 4a arranged in the peripheral surface exposed portions of the transparent sheets 3 and 4 stacked vertically and the FPCs 7D and 7A ′ A double-sided adhesive transparent adhesive sheet 8H between the wide portion 7Dd projecting on both sides of each FPC 7D and the transparent sheet 3 so as to further fix each joint electrode wiring part with the electrode wiring of the plurality of conductive films 7c arranged. (Reinforcing material) is pasted together, and a double-sided adhesive transparent adhesive sheet 8H (reinforcing material) is interposed between the wide portion 7A'd protruding on both sides of the FPC 7A 'and the transparent sheet 4. Both are pasted.

As described above, according to Embodiment 7, the anisotropic conductive film 6D and the transparent adhesive sheet 8H are interposed between the transparent sheet 3 and the wide portion 7Dd of the FPC 7D, and the transparent sheet 4 is attached. And the wide part 7A'd of the FPC 7A ', the anisotropic conductive film 6D and the transparent pressure-sensitive adhesive sheet 8H are interposed and bonded to each other. Can be more firmly fixed to prevent the FPCs 7D and 7A ′ from peeling off more reliably.

The first to eighth embodiments of the present invention can be variously modified within the scope indicated in the claims of the present application. In other words, embodiments obtained by further combining technical means appropriately changed within the scope of the claims of the present application are also included in the technical scope of the present invention. Furthermore, it is possible to combine at least two of the first to eighth embodiments.

As described above, the present invention has been exemplified using the preferred embodiments 1 to 8 of the present invention. However, the present invention should not be construed as being limited to these embodiments 1 to 8. It is understood that the scope of the present invention should be construed only by the claims. It is understood that those skilled in the art can implement an equivalent range from the description of specific preferred embodiments 1 to 8 of the present invention based on the description of the present invention and the common general technical knowledge. Patents, patent applications, and documents cited herein should be incorporated by reference in their entirety, as if the contents themselves were specifically described herein. Understood.

The present invention relates to a personal computer (PC), a tablet terminal, a digital signage, and an electronic device that are mounted on a display screen of a display device such as a liquid crystal display device and detects a touch position by an instruction operation with a pointer corresponding to display contents. Capacitance type touch panel sensor sheet module that can be used for applications such as blackboard and enables touch panel sensor module and touch panel system module manufacturing method using the same. It is easy and there is no increase in man-hours, high connection reliability between the transparent sheet on which the conductive film is formed and the FPC can be secured, and the occurrence of problems such as peeling during assembly after FPC bonding can be suppressed. it can.

Claims (6)

1. A plurality of conductors disposed on a flat plate to create a position information signal;
   A first electrode connected to the conductor and disposed on the plane;
   A touch panel sensor sheet module comprising: a second electrode connected to the first electrode; and a flexible wiring board provided with a wiring connected to the second electrode,
   A touch panel sensor sheet module in which a reinforcing material is attached so as to include at least a boundary portion between the flexible wiring board and the flat plate.
2. A first transparent sheet having a plurality of conductors arranged on the flat plate formed on the surface thereof;
   A plurality of conductors arranged on a flat plate different from the flat plate is formed on the surface thereof, and laminated on the first transparent sheet so as to intersect the conductor formed on the surface of the first transparent sheet. Having a second transparent sheet,
   The first electrode is
   The touch panel sensor sheet module according to claim 1, wherein the touch panel sensor sheet module is disposed on each of the first transparent sheet and the second transparent sheet, and is connected to the second electrode by an anisotropic conductive film.
3. The reinforcing material is
   The touch panel sensor sheet module according to claim 1 or 2, wherein the reinforcing material is attached so as to cover an end of the flexible wiring board including a connection portion between the first electrode and the second electrode.
4. The reinforcing material is
   The touch panel sensor sheet module according to claim 1 or 2, wherein the touch panel sensor sheet module is affixed to each of the boundary portions and two locations corresponding to the width direction of the flexible wiring board.
5. The reinforcing material is
   The touch panel sensor sheet module according to claim 1 or 2, wherein the touch panel sensor sheet module is interposed between the flexible wiring board and the flat plate.
6. Manufacturing the touch panel sensor sheet module according to claim 1 or 2,
   Electrically connecting the electrode terminal group on the opposite side of the flexible wiring board of the touch panel sensor sheet module to the electrode terminal group of the control board.

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