Adherend-equipped substrate

Abstract

Provided is an adherend-equipped substrate capable of having an adherend securely adhered to a front face of a protective layer using an adhesive. The adherend-equipped substrate (1) is provided with a substrate (2) and an adherend (3). The adherend (3) is adhered to a front face (2s) of the substrate (2) using an adhesive (4). The substrate (2) is provided with a substrate body (21) and a protective layer (23). The protective layer (23) is provided on the side of the substrate body (21) having a front face (21s). A front face (23s) of the protective layer (23) comprises a first region (23a) and a second region (23b). The first region (23a) is a region adhered to the adherend (3) using the adhesive (4) and comprises a first contact angle. The second region (23b) is a region other than the first region (23a) and comprises a second contact angle. The first contact angle is smaller than the second contact angle.

Description

Substrate with adherend

[0001] The present disclosure relates to a substrate with an adherend, and more particularly to a substrate with an adherend in which the adherend is adhered to the substrate by an adhesive.

[0002] The glass article (substrate with adherend) described in Patent Document 1 includes a glass substrate (substrate body), an antifouling layer (protective layer) formed on a first main surface (front surface) of the glass substrate, and a member (adherend) bonded to the antifouling layer with an adhesive. The antifouling layer is selectively removed by laser irradiation, and the glass substrate, which is the layer below the antifouling layer, is exposed from the removed portion. The member is bonded to the removed portion of the protective layer (the portion where the layer below the protective layer is exposed) with an adhesive.

[0003] In the above-described glass article, when the layer below the antifouling layer is exposed by laser irradiation in the removed portion of the antifouling layer, the layer may be scraped off by the laser irradiation, resulting in a deterioration in the functionality of the layer below the antifouling layer. To avoid this deterioration, it is conceivable to bond the above-described component to the front surface of the antifouling layer with an adhesive without removing the antifouling layer. In this case, since the front surface of the antifouling layer typically has a large contact angle, when an adhesive is applied to the front surface of the protective layer, numerous localized air pockets are trapped in the adhesive layer. As a result, the above-described component cannot be firmly bonded to the front surface of the antifouling layer with the adhesive.

[0004] Japanese Patent Application Laid-Open No. 2018-48061

[0005] An object of the present disclosure is to provide a substrate with an adherend that can be firmly adhered to the front surface of a protective layer with an adhesive.

[0006] A substrate with an adherend according to one embodiment of the present disclosure comprises a substrate and an adherend. The adherend is adhered to the front surface of the substrate with an adhesive. The substrate comprises a substrate main body and a protective layer. The protective layer is disposed on the front surface side of the substrate main body. The front surface of the protective layer has a first region and a second region. The first region is a region to which the adherend is adhered with the adhesive and has a first contact angle. The second region is a region other than the first region and has a second contact angle. The first contact angle is smaller than the second contact angle.

[0007] FIG. 1 is a cross-sectional view of an adherend-attached substrate according to an embodiment. FIG. 2 is a plan view showing the front surface of a substrate included in the adherend-attached substrate according to the embodiment. FIG. 3 is an explanatory diagram illustrating a contact angle on the front surface of the substrate according to the embodiment. FIG. 4 is an explanatory diagram illustrating a processing step between a first region and a second region. FIG. 5A is an explanatory diagram illustrating a process of surface-treating the front surface of the substrate according to the embodiment. FIG. 5B is an explanatory diagram illustrating a process of applying an adhesive to the front surface of the substrate according to the embodiment. FIG. 5C is an explanatory diagram illustrating a process of adhering an adherend to the front surface of the substrate according to the embodiment with an adhesive. FIG. 6A is an explanatory diagram illustrating a process of applying an adhesive to the front surface of a substrate according to Comparative Example 1. FIG. 6B is an explanatory diagram illustrating a process of adhering an adherend to the front surface of a substrate according to Comparative Example 1 with an adhesive. FIG. 7 is a perspective view of an input system as an application example of the adherend-attached substrate according to the embodiment. FIG. 8 is a schematic diagram of a cross section taken along line X1-X1 in FIG. 7. FIG. 9 is an exploded perspective view of the input system according to the embodiment. FIG. 10 is a perspective view of an input device included in the input system according to the embodiment, viewed from the rear. Fig. 11 is a cross-sectional view taken along the line X2-X2 in Fig. 10. Fig. 12 is an exploded perspective view of a touch panel sensor provided in the input system.

[0008] The substrate with adherend according to the embodiment of the present disclosure will be described with reference to the drawings. The drawings described in the following embodiments are schematic diagrams, and the ratios of the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios.

[0009] (1) Overview As shown in FIG. 1 , the adherend-attached substrate 1 of this embodiment includes a substrate 2 and an adherend 3. The adherend 3 is adhered to the front surface 2s of the substrate 2. The substrate 2 includes a substrate main body 21 and a protective layer 23. The protective layer 23 is disposed on the front surface 21s side of the substrate main body 21. The front surface 23s of the protective layer 23 has a first region 23a and a second region 23b. The first region 23a is the region to which the adherend 3 is adhered with the adhesive 4, and has a first contact angle. The second region 23b is the region other than the first region 23a, and has a second contact angle. The first contact angle is smaller than the second contact angle.

[0010] According to this configuration, the first contact angle of the first region 23a is smaller than the second contact angle of the second region 23b on the front surface 23s of the protective layer 23. Therefore, when the adhesive 4 is applied to the first region 23a, it is possible to prevent numerous localized air layers from being mixed into the adhesive layer made of the adhesive 4. As a result, the adherend 3 can be firmly bonded to the front surface 23s of the protective layer 23 by the adhesive 4.

[0011] (2) Details (2-1) Configuration The adherend-attached substrate 1 of this embodiment will be described in detail with reference to FIGS. 1 to 6. FIG.

[0012] The adherend-attached substrate 1 of this embodiment is, generally speaking, an adherend-attached substrate in which an adherend 3 can be firmly adhered with an adhesive 4 to the front surface 2s of a substrate 2 whose outermost layer is the protective layer 23 (i.e., the front surface 23s of the protective layer 23). Therefore, the adherend-attached substrate 1 can be applied to any technical field as long as it includes a configuration in which an adherend 3 is adhered with an adhesive 4 to the front surface 2s of a substrate 2 whose outermost layer is the protective layer 23.

[0013] For example, the adherend-attached substrate 1 can be applied when an input device is attached with an adhesive to the front surface of a cover lens provided on the front surface of a touch panel sensor. Here, the input device is a device that detects operations performed on the input device using the touch detection function of the touch panel sensor. In this case, the cover lens corresponds to the substrate 2 provided on the adherend-attached substrate 1, and the input device corresponds to the adherend 3 provided on the adherend-attached substrate 1.

[0014] The adherend-attached substrate 1 can also be applied when a camera device or a drive recorder is attached to the top of a vehicle windshield with an adhesive. In this case, the windshield corresponds to the substrate 2 provided on the adherend-attached substrate 1, and the camera device and the drive recorder correspond to the adherend 3 provided on the adherend-attached substrate 1.

[0015] As shown in FIG. 1, the adherend-attached substrate 1 includes a substrate 2 and an adherend 3 .

[0016] The adherend 3 is an object that is adhered to the front surface 2s of the substrate 2 with the adhesive 4. The adherend 3 may be, for example, a device or a member.

[0017] The substrate 2 is a member to which the adherend 3 is adhered. The substrate 2 includes a substrate body 21, a glass reinforced layer 22, and a protective layer 23.

[0018] The substrate body 21 is a base material of the substrate 2 and is, for example, a glass substrate. Note that the substrate body 21 is not limited to a glass substrate, and may be, for example, a resin substrate.

[0019] The glass reinforced layer 22 is a functional layer (i.e., a reinforced layer that reinforces the glass substrate) for making the substrate body 21, which is a glass substrate, less likely to break, and is provided on the front surface 21s of the substrate body 21. The glass reinforced layer 22 may be, for example, a compressive stress layer or a reinforced film.

[0020] The compressive stress layer is formed on the front surface 21s of the substrate body 21, which is a glass substrate, by heat treatment or chemical treatment of the front surface 21s of the substrate body 21. In the heat treatment, the front surface 21s of the substrate body 21, which is a glass substrate, is heated and then rapidly cooled, thereby forming the compressive stress layer on the front surface 21s of the substrate body 21. In the chemical treatment, sodium ions on the front surface 21s of the substrate body 21, which is a glass substrate, are replaced with potassium ions, which have a large ionic radius, thereby forming the compressive stress layer on the front surface 21s of the substrate body 21. The reinforced film is a film adhered to the front surface 21s of the substrate body 21 and can be made of, for example, acrylic, soft acrylic, or polycarbonate.

[0021] The glass reinforced layer 22 is not an essential component and may be omitted. In this case, the protective layer 23 is provided on the front surface 21s of the substrate main body 21. Instead of the glass reinforced layer 22, a functional layer having a function other than that of the glass reinforced layer 22 may be provided between the substrate main body 21 and the protective layer 23.

[0022] The protective layer 23 is a layer that protects the front surface 22s of the reinforced glass layer 22 (i.e., the front surface of the layer below the protective layer 23), and is provided on the front surface 22s of the reinforced glass layer 22. The protective layer 23 is, for example, an anti-fingerprint layer that prevents fingerprints from adhering to the front surface 22s of the reinforced glass layer 22.

[0023] The protective layer 23 can be formed of, for example, a fluororesin, silicone, or fluorine-modified silane. Specifically, the fluororesin may be a fluoroethylene-vinyl ether copolymer or PTFE (polytetrafluoroethylene). Specifically, the silicone may be a silicone resin or a silicone oligomer. The fluorine-modified silane is mainly used in touch panel applications.

[0024] The front surface 23s of the protective layer 23 constitutes the front surface 2s of the substrate 2. The front surface 23s of the protective layer 23 has a first region 23a and a second region 23b.

[0025] The first region 23a is a region where the adherend 3 is adhered with the adhesive 4, and is, for example, a region including the outer shape 3a of the adhesive surface of the adherend 3 that contacts the protective layer 23 (see FIG. 2 ). The adhesive surface of the adherend 3 is the surface of the adherend 3 that contacts the protective layer 23. In the example of FIG. 2 , the outer shape 3a of the adhesive surface of the adherend 3 is circular, and the first region 23a is circular. Here, the "region including the outer shape 3a of the adhesive surface of the adherend 3" may be, for example, a region having the same shape and size as the outer shape 3a of the adhesive surface of the adherend 3, or may be a region slightly larger than the outer shape 3a of the adhesive surface of the adherend 3. In the example of FIG. 2 , the first region 23a is a region slightly larger than the outer shape 3a of the adhesive surface of the adherend 3. The second region 23b is a region of the front surface 23s of the protective layer 23 other than the first region 23a. The first region 23 a has a first contact angle, and the second region 23 b has a second contact angle, and the first contact angle is smaller than the second contact angle. In this embodiment, for example, the second contact angle is larger than 90 degrees, and the first contact angle is 90 degrees or less.

[0026] Here, the "contact angle" is an index for evaluating the property (wettability) that represents the ease with which a droplet (adhesive 4 in this embodiment) adheres to the front surface 23s of the protective layer 23. The "contact angle" is the angle θ formed between the droplet surface 5s at point P1, where the droplet surface 5s contacts the front surface 23s of the protective layer 23, and the front surface 23s of the protective layer 23 when, for example, water 5 (e.g., pure water) is applied to the front surface 23s of the protective layer 23 instead of the adhesive 4 as a droplet for contact angle measurement, and the attached state is viewed from the side (see FIG. 3 ). The first contact angle is the angle θ of the droplet (e.g., water) for contact angle measurement applied to the first region 23a, and the second contact angle is the angle θ of the droplet (e.g., water) for contact angle measurement applied to the second region 23b. The smaller the contact angle, the easier it is for a droplet to adhere to the front surface 23s of the protective layer 23.

[0027] Here, pure water is used as the droplet for measuring the contact angle, and the magnitude of the contact angles in the two regions 23 a and 23 b is compared. However, an adhesive having a viscosity different from that of pure water may be used as the droplet for measuring the contact angle, and the magnitude of the contact angles in the two regions 23 a and 23 b may be compared. In this case, the absolute values ​​(measured values) of the adhesion angles in the two regions are different from those in the case where pure water is used, but the magnitude relationship between the adhesion angles in the two regions is the same as in the case where pure water is used.

[0028] In this way, by making the first contact angle of the first region 23a, to which the adherend 3 is adhered, smaller than the second contact angle of the second region 23b, the adhesion of the adhesive 4 in the first region 23a is improved. This makes it possible to prevent numerous localized air spaces from being mixed into the adhesive layer formed by the adhesive 4 when the adhesive 4 is applied to the first region 23a. As a result, the adherend 3 can be firmly adhered to the first region 23a of the protective layer 23 by the adhesive 4. More specifically, it is desirable that the first contact angle of the first region 23a be 90 degrees or less. This makes it possible to sufficiently improve the adhesion of the adhesive 4 in the first region 23a.

[0029] In this way, making the first contact angle of the first region 23a smaller than the second contact angle of the second region 23b or making the first contact angle of the first region 23a 90 degrees or less can be achieved by surface processing the first region 23a of the protective layer 23 by laser irradiation, sandblasting, or the like. Note that the surface processing by laser irradiation or sandblasting includes physically removing the front surface 23s of the protective layer 23 to a certain depth and modifying the front surface 23s of the protective layer 23.

[0030] At this time, the surface processing may physically remove the front surface of the first region 23a to a certain depth, resulting in a processing step D1 on the front surface 23s of the protective layer 23 that makes the first region 23a stepwise lower than the second region 23b (see Figure 4).

[0031] Thus, even if a processing step D1 occurs, in this embodiment, the processing step D1 is limited to be smaller than the thickness D2 of the protective layer 23 in the second region 23b. This prevents the lower layer of the protective layer 23 from being exposed or scraped away due to surface processing. The processing step D1 is desirably equal to or less than half (preferably equal to or less than one-third) of the thickness D2 of the protective layer 23. This reliably prevents the lower layer of the protective layer 23 from being exposed due to the processing step D1 in the first region 23a of the protective layer 23. As a result, the adhesive 4 can be bonded with the adhesive 4 in the first region 23a without affecting the lower layer of the protective layer 23.

[0032] (2-2) Manufacturing Method A method for manufacturing the adherend-attached substrate 1 will be described with reference to FIGS. 5A to 5C.

[0033] A substrate 2 is prepared (see FIG. 5A ). Then, of the front surface 2s of the substrate 2 (i.e., the front surface 23s of the protective layer 23), surface processing by laser irradiation or sandblasting is performed only on the first region 23a, without performing surface processing by laser irradiation or sandblasting on the second region 23b. By performing surface processing on the first region 23a, the first contact angle of the first region 23a is made smaller than the second contact angle of the second region 23b. In this embodiment, it is assumed that the contact angle of the front surface 23s of the protective layer 23 before performing surface processing on the first region 23a (i.e., the second contact angle of the second region 23b) is greater than 90 degrees. Therefore, in this embodiment, the surface processing on the first region 23a makes the first contact angle 90 degrees or less.

[0034] When surface processing (surface modification) of the first region 23a is performed using an excimer laser, the first region 23a of the front surface 2s of the substrate 2 is exposed and the second region 23b is covered with a mask material. The substrate 2 is then placed in the laser chamber of an excimer laser device. Then, in the laser chamber, only the first region 23a is surface processed using a gas laser excited by pulse discharge, using a mixture of rare gas and halogen as a catalyst. Therefore, by placing multiple substrates 2 in the laser chamber, it is possible to simultaneously process the surface of the first region 23a of each of the multiple substrates 2. In other words, it is possible to manufacture a large number of substrates 2 at one time.

[0035] Then, adhesive 4 is applied to the surface-treated first region 23a (see FIG. 5B ). At this time, the first contact angle of the first region 23a is 90 degrees or less, so when the adhesive 4 is applied to the first region 23a, it is possible to prevent numerous localized air layers from being mixed into the adhesive layer made of the adhesive 4. In other words, the adhesive 4 can be applied satisfactorily to the first region 23a.

[0036] Then, the adherend 3 is bonded to the first region 23a via the adhesive layer made of the adhesive 4 (see FIG. 5C ). At this time, the adhesive layer made of the adhesive 4 contains almost no local air spaces, so the adherend 3 can be firmly bonded to the first region 23a by the adhesive 4.

[0037] (2-3) Comparison with Comparative Example 1 in Which the First and Second Contact Angle Are the Same Comparative Example 1 is configured similarly to the adherend-attached substrate 1 of the present embodiment, except that the first contact angle in the first region 23a is the same as the second contact angle in the second region 23b. That is, in Comparative Example 1, surface processing by laser irradiation or sandblasting was not performed in the first region 23a. Therefore, the first contact angle in Comparative Example 1 is larger than the first contact angle in the adherend-attached substrate 1 described in the present embodiment. That is, the adhesive strength of the adhesive 4 in Comparative Example 1 is lower in the first region 23a than in the adherend-attached substrate 1 of the present embodiment. Therefore, when the adhesive 4 is applied to the first region 23a in Comparative Example 1, the adhesive 4 is distributed unevenly in the first region 23a (see FIG. 6A). When the adherend 3 is attached to the first region 23a via the adhesive 4 in this state, numerous localized air layers 4a are mixed into the adhesive layer made of the adhesive 4 (see FIG. 6B). Therefore, in Comparative Example 1, the adherend 3 cannot be firmly adhered to the first region 23a, as compared with the adherend-attached substrate 1 of this embodiment.

[0038] (2-4) Comparison of Surface Processing Methods (2-4-1) Comparison Results We will consider effective surface processing methods for performing surface processing on the first region 23a of the adherend-attached substrate 1 of this embodiment. Table 1 below shows the measurement results of various measurement items (first contact angle, surface roughness, processing step, stress test) when various surface processing methods (samples 1 to 11) were performed. The thickness of the protective layer 23 of samples 2 to 11 is, for example, 8 μm.

[0039]

[0040] Samples 1 and 2 are examples in which the first region 23a is not surface-treated and are described as reference examples. Sample 1 is a reference example in which the substrate 2 is made of only a glass substrate and does not have the protective layer 23. Sample 2 is a reference example in which the substrate 2 is made of a glass substrate with an AGARAF coating and has the protective layer 23 (the AF coating of the above-mentioned AGARAF coating).

[0041] The "AG" in the AGARAF coating stands for AG (Anti-Glare) coating, a process that creates extremely fine irregularities on the surface of the substrate 2 (glass substrate) to diffuse reflected light and reduce reflections and glare. The "AR" in the AGARAF coating stands for AR (Anti-Reflection) coating, a process that prevents light reflection by creating a film of a material with a different refractive index on the surface of the substrate 2 (glass substrate) to change the light transmission characteristics. The "AF" in the AGARAF coating stands for AF (Anti-Fingerprint) coating, a process that water-repellents the surface of the substrate 2 (glass substrate) to prevent fingerprints, water, and oil stains.

[0042] Samples 3 to 7 are surface treatment methods in which the first region 23a is surface treated with sandblasters of #100, #120, #280, #320, and #400, respectively. The numbers such as "#100" represent the grain size (size) of the sand used in sandblasting. The larger the grain size number, the finer the sand used.

[0043] Sample 8 is a surface processing method in which the surface of the first region 23a is processed by laser irradiation using a UV-YAG laser.

[0044] Samples 9 and 10 are surface processing methods in which the surface of the first region 23a is processed by laser irradiation using a CO2 laser, and the processing speeds for Samples 9 and 10 are 500 mm / s and 2000 mm / s, respectively.

[0045] Sample 11 is a surface processing method in which the surface of the first region 23a is processed by laser irradiation using an excimer laser.

[0046] The first contact angle, which is a measurement item, is the contact angle measured 5 seconds after water (pure water) is dropped onto the first region 23 a as a droplet for contact angle measurement. The unit of the first contact angle is [deg (degrees)].

[0047] The surface roughness measured is the surface roughness of the first region 23a that has been subjected to surface processing, and the unit of surface roughness is [Ra].

[0048] The measurement item of the machining step is a machining step D1 that occurs when the first region 23a is surface-machined. The unit of the machining step is [μm].

[0049] The stress test, which is a measurement item, is a test to determine whether or not the adherend 3 comes off the first region 23a when the adherend 3 is adhered to the first region 23a with the adhesive 4 and, after the adhesive 4 has hardened, the adherend 3 is pushed in a direction parallel to the first region 23a with a force of 300 N. OK in Table 1 indicates a result in which the adherend 3 did not come off the first region 23a, and NG in Table 1 indicates a result in which the adherend 3 came off the first region 23a.

[0050] (2-4-2) Evaluation Results Since the measurement result of the stress test for sample 2 was NG, it can be seen that when the substrate 1 with the adherend has a protective layer 23, the first region 23a should be surface-treated so that the first contact angle is 90 degrees or less, and the adherend 3 should be adhered to the first region 23a with the adhesive 4.

[0051] In the case of sample 9, the measured processing step (56 μm) exceeded the thickness of the protective layer 23 (8 μm), and therefore it was found that this was not an effective surface processing method.

[0052] The stress test results for Samples 3-8 and 10-11 were satisfactory, demonstrating that Samples 3-8, 10-11 are effective surface processing methods. In particular, for Samples 5-8 and 10-11, the measured processing step heights (0.72 μm, 1.81 μm, 1.09 μm, 0 μm, 7.23 μm, 0 μm) were smaller than the thickness of the protective layer 23 (8 μm). This prevents the surface processing of the first region 23a from abrading the underlying layer of the protective layer 23 (the glass reinforced layer 22). As a result, the surface processing of the first region 23a does not impair the functionality of the underlying layer of the protective layer 23. Furthermore, because Samples 8 and 11 have zero surface step height, the surface processing of the first region 23a does not impair the functionality of the protective layer 23.

[0053] Furthermore, by comparing the measurement result of the first contact angle (111.1 degrees) of sample 2, which gave an NG result in the stress test, with the measurement results of the first contact angles of samples 1, 3 to 8, and 10 to 11, which gave an OK result in the stress test (11.8 degrees, 33.2 degrees, 14.4 degrees, 46.4 degrees, 63.8 degrees, 10.0 degrees, 48.8 degrees, 65 degrees), it can be estimated that a first contact angle of, for example, 90 degrees or less is effective for giving an OK result in the stress test.

[0054] (3) Application Example The case where the adherend-attached substrate 1 of this embodiment is applied to an input system in which an input device and a touch panel sensor are combined will be exemplified.

[0055] (3-1) Overview As shown in FIGS. 7, 8, and 9, the adherend-attached substrate 1 serving as an input system includes, in addition to the configuration described in "(1) Overview" above, a touch panel sensor 6 disposed on the rear surface 2b of the substrate 2. The touch panel sensor 6 has multiple sensor electrodes (multiple first wiring electrodes X1 and multiple second wiring electrodes Y1) for detecting the position of an operator's touch on the front surface 2s of the substrate 2. The adherend 3 is an input device that accepts operations (e.g., rotation operations and pressing operations) by the operator. Hereinafter, the input device will be referred to as the input device 3. The input device 3 has an operation unit 30 and a counter electrode 8. The operation unit 30 is displaced in response to the operator's operation. The counter electrode 8 faces at least one of the multiple sensor electrodes (multiple first wiring electrodes X1 and multiple second wiring electrodes Y1). The electrical state (e.g., capacitance value) of the counter electrode 8 changes in response to the displacement of the operation unit 30.

[0056] According to this configuration, the input device 3 can be firmly adhered with the adhesive 4 to the front surface 2 s of the substrate 2 that is disposed on the front surface 6 s of the touch panel sensor 6 .

[0057] Furthermore, in the substrate 1 with adherend as an input system, the counter electrode 8 of the input device 3 includes a first fixed electrode (fixed electrodes 39a, 39b, 39d) and a second fixed electrode (common electrode 39c) that are adhered to the first region 23a of the front surface 2s of the substrate 2 with adhesive 4. The input device 3 further includes a movable electrode 37b. The movable electrode 37b displaces in conjunction with the operation unit 30, thereby establishing and interrupting electrical continuity between the first fixed electrode (fixed electrodes 39a, 39b, 39d) and the second fixed electrode (fixed electrode 39c). This establishment and interruption of electrical continuity changes the electrical state (e.g., capacitance value) of each of the first and second fixed electrodes.

[0058] According to this configuration, when the input device 3 has fixed electrodes 39a to 39d (first fixed electrode and second fixed electrode) and a movable electrode 37b, the input device 3 can be firmly adhered with adhesive 4 to the front surface 2s of the substrate 2 arranged on the front surface 6s of the touch panel sensor 6.

[0059] 7 and 9, the substrate 1 with adherend, which is an input system, includes a substrate 2 which is a cover lens, an adherend 3 which is an input device, and a touch panel sensor 6. In the following description, the substrate 2 will be referred to as the cover lens 2, and the adherend 3 will be referred to as the input device 3.

[0060] The cover lens 2 is a member that protects the front surface 6s of the touch panel sensor 6. The cover lens 2 is formed into a sheet shape using a transparent member, and is disposed on the front surface 6s of the touch panel sensor 6.

[0061] The touch panel sensor 6 is disposed on the display screen of a predetermined display device, and is a device that detects the position where an operator touches the display screen (i.e., the position where an operator touches the front surface 2s of the cover lens 2).

[0062] The input device 3 is a device that accepts operations (e.g., rotation operations and pressing operations) by an operator. The input device 3 has, for example, a circular ring shape. An operation unit 30 operated by the operator is provided on the front side of the input device 3, and fixed electrodes 39a to 39d are provided on the rear surface of the input device 3 (i.e., the rear surface 38b of the case 38 described below) (see FIG. 10). The rear surface 38b of the input device 3 is an adhesive surface that is bonded to the front surface 2s of the cover lens 2. The input device 3 is bonded to any position on the front surface 2s of the cover lens 2 with an adhesive (see FIG. 7). When the operation unit 30 is operated in this bonded state, the electrical state (e.g., capacitance value) of the fixed electrodes 39a to 39d changes in response to the operation. This electrical state is detected by the touch position detection function of the touch panel sensor 6, and the operation of the operation unit 30 is detected.

[0063] (3-2-2) Details of the Input Device An example of the input device 3 will be described in detail with reference to FIGS. 7, 10, and 11. FIG.

[0064] 11, the input device 3 includes an operation unit 30, a rotating body 31, a fixed member 32, a pressing member 33, a return spring 34, a click spring 35, a rotary click cam 36, and a rotary contact plate 37. The input device 3 further includes a case 38, a plurality of (e.g., four) fixed electrodes 39a to 39d (see FIG. 10), a plurality of (e.g., four) contacts 40, and a push switch. When distinguishing between the four contacts 40, they are referred to as first to fourth contacts 40.

[0065] The operation unit 30 is a component that receives operations (rotational operations and pressing operations) from the operator and displaces (rotates and moves back and forth) in response to the received operations. The operation unit 30 is displaceable relative to the case 38 (and therefore relative to the fixed electrodes 39a to 39d) in response to operations by the operator. The operation unit 30 is box-shaped and annular in plan view with a central opening. The rear surface of the operation unit 30 is open. The operation unit 30 contains each of the components (rotating body 31, fixed member 32, pressing member 33, return spring 34, click spring 35, rotary click cam 36, rotary contact plate 37, and case 38).

[0066] The rotating body 31 is disposed so as to be displaceable (rotatable and movable back and forth) relative to the case 38. The rotating body 31 is rotatable and movable back and forth together with the operating unit 30 in response to the rotation and back and forth movement of the operating unit 30. The rotating body 31 is made of resin. The rotating body 31 is a circular frame in plan view with a central opening, and the front part of the rotating body 31 protrudes toward the inner periphery. The rotating body 31 is disposed on the outer periphery inside the operating unit 30 and is fixed to the operating unit 30.

[0067] The fixing member 32 is a member that fixes the rotating body 31 to the case 38 so that the rotating body 31 can rotate and move back and forth. The fixing member 32 is made of resin. The fixing member 32 is, for example, cylindrical and annular in plan view with an opening, and the front portion of the fixing member 32 is inclined toward the outer periphery. The fixing member 32 is fixed to the case 38 so as to be positioned inside the rotating body 31. The outer peripheral edge of the front portion of the fixing member 32 is positioned in front of the inner peripheral edge of the rotating body 31. In this way, the fixing member 32 fixes the rotating body 31 to the case 38 so that the rotating body 31 can rotate and move back and forth.

[0068] The pressing member 33 is a member that moves back and forth in response to the back and forth movement of the operating unit 30, thereby pressing the push switch PS1 inside the case 38. The pressing member 33 has a short cylindrical shape. The pressing member 33 is disposed inside the case 38, behind the inner peripheral edge of the rotating body 31 (the portion that protrudes inward from the front part of the rotating body 31).

[0069] The return spring 34 is a spring member that biases the operating unit 30 forward. The return spring 34 is in the shape of an annular plate and curved back and forth along the circumferential direction. The return spring 34 is disposed between the rotating body 31 and the front end of the outer peripheral wall of the case 38. The return spring 34 biases the rotating body 31 forward, thereby biasing the operating unit 30 forward.

[0070] The click spring 35, together with the rotary click cam 36, is a component that generates a clicking sensation in response to a rotational operation by the operator. The click spring 35 is in the form of a thin, annular plate. The click spring 35 has two protrusions that are arranged at equal intervals in the circumferential direction and protrude rearward on the rear surface 35b of the click spring 35. The click spring 35 is fixed to the case 38 so that the two protrusions contact the uneven portion, described below, on the front surface 36s of the rotary click cam 36. The click spring 35 is fixed by being sandwiched between the fixing member 32 and the front end of the inner peripheral wall of the case 38.

[0071] The rotary click cam 36, together with the click spring 35, is a component that generates a clicking sensation in response to a rotational operation by the operator. The rotary click cam 36 is made of resin and has a circular plate shape. The rotary click cam 36 has an uneven portion. The uneven portion is formed on the front surface 36s of the rotary click cam 36 so that convex and concave portions alternate over the entire circumferential direction. The rotary click cam 36 is positioned on the rear side of the click spring 35 so that the two protrusions of the click spring 35 contact the uneven portion. The rotary click cam 36 is connected to the rotating body 31 and rotates integrally with the rotating body 31. When the rotary click cam 36 rotates, the two protrusions of the click spring 35 pass over the respective convex portions of the uneven portion, generating a clicking sensation.

[0072] The rotary contact plate 37 is annular. It includes an insulating substrate 37a and a movable electrode 37b. The movable electrode 37b displaces relative to the fixed electrodes 39a-39d (described later) in conjunction with the operating unit 30, thereby establishing and interrupting electrical continuity between the fixed electrodes 39a, 39b, and 39d and the fixed electrode 39c. This conduction and interruption changes the electrical state (e.g., capacitance value) of each of the fixed electrodes 39a-39d. The movable electrode 37b is provided on the rear surface of the insulating substrate 37a. The movable electrode 37b has multiple electrode portions electrically connected to each other. The multiple electrode portions are arranged at equal intervals in the circumferential direction on the rear surface of the insulating substrate 37a. The front surface of the rotary contact plate 37 is fixed to the rear surface of the rotary click cam 36. This allows the rotary contact plate 37 to rotate integrally with the rotary click cam 36.

[0073] Each component (operating unit 30, rotating body 31, fixed member 32, pressing member 33, return spring 34, click spring 35, rotating click cam 36, rotating contact plate 37, four fixed electrodes 39a to 39d, four contacts 40, and push switch) is attached to case 38 (see Figures 10 and 11).

[0074] The case 38 is made of resin. The case 38 is annular in plan view with a central opening and box-like shape with an open front. Four fixed electrodes 39a to 39d are provided on the rear surface 38b of the case 38 (see FIG. 10). Each of the fixed electrodes 39a to 39d has, for example, a substantially rectangular shape. The fixed electrodes 39a to 39d are arranged at intervals (for example, equal intervals) in the circumferential direction on the rear surface 38b of the case 38.

[0075] The rear surface 38b of the case 38 is an adhesive surface to be bonded to the front surface 2s of the cover lens 2. That is, the rear surface 38b of the case 38 is bonded to the first region 23a of the front surface 2s of the cover lens 2 with the adhesive 4, and thus the input device 3 is bonded to the front surface 2s of the cover lens 2 with the adhesive 4.

[0076] In this bonded state, the four fixed electrodes 39a to 39d are bonded to the first region 23a of the front surface 2s of the cover lens 2 by the adhesive 4. In plan view from a direction perpendicular to the front surface 2s of the cover lens 2, the first region 23a encompasses the fixed electrodes 39a to 39d (see FIG. 2). In addition, in the above-described bonded state, the four fixed electrodes 39a to 39d face at least one of the plurality of sensor electrodes (the plurality of first wiring electrodes X1 and the plurality of second wiring electrodes Y1) of the touch panel sensor 6. As will be described later, the electrical states (e.g., capacitance values) of the four fixed electrodes 39a to 39d change in response to the displacement of the operation unit 30.

[0077] Four contacts 40 and a push switch PS1 are arranged on the bottom surface of the interior of the case 38. Each contact 40 is electrically connectable to the movable electrode 37b of the rotary contact plate 37 by elastically contacting the rear surface of the rotary contact plate 37. The four contacts 40 correspond one-to-one to the four fixed electrodes 39a to 39d and are electrically connected to the corresponding fixed electrodes 39a to 39c. In this embodiment, the first contact 40 is connected to the fixed electrode 39a, the second contact 40 is connected to the fixed electrode 39b, and the third and fourth contacts 40 are connected to the fixed electrode 39c. The push switch PS1 is a push-button switch that is switched on and off by pressing the operation unit 30. The push switch PS1 connects or disconnects the fixed electrode 39d and the fixed electrode 39c depending on whether it is on or off. Hereinafter, the fixed electrode 39c may be referred to as the common electrode 39c.

[0078] In this input device 3, the fixed member 32 and the click spring 35 are fixed to a case 38, and the rotating body 31 and the rotary click cam 36 are connected to the operation unit 30 so as to be rotatable integrally with the operation unit 30. The operation unit 30 and the rotating body 31 are further connected to be movable back and forth integrally.

[0079] Therefore, when the operating unit 30 is rotated, the rotating click cam 36 rotates together with the operating unit 30. As a result, the contacts of the four contacts 40 provided on the case 38 move relatively on the rear surface of the rotary contact plate 37 fixed to the rotary click cam 36. This movement repeatedly brings the four contacts 40 into contact with and away from each of the multiple electrode portions of the movable electrode 37b of the rotary contact plate 37. At this time, when at least one of the third and fourth contacts 40 and the first contact 40 both come into contact with the movable electrode 37b, the fixed electrode 39a and the common electrode 39c are electrically connected via the movable electrode 37b. Furthermore, when the first contact 40 or either the third or fourth contact 40 separates from the movable electrode 37b, the fixed electrode 39a and the common electrode 39c are disconnected. When at least one of the third and fourth contactors 40 and the second contactor 40 both come into contact with the movable electrode 37b, the fixed electrode 39b and the common electrode 39c are electrically connected via the movable electrode 37b. When either the second contactor 40 or the third and fourth contactors 40 separate from the movable electrode 37b, the fixed electrode 39b and the common electrode 39c are disconnected. When the fixed electrodes 39a, 39b, and 39d are electrically connected to the common electrode 39c, the capacitance values ​​of the fixed electrodes 39a, 39b, and 39d change (increase) by the capacitance value of the common electrode 39c. In this way, the movable electrode 37b displaces relative to the fixed electrodes 39a to 39d in conjunction with the operation unit 30, thereby changing the electrical state (e.g., capacitance value) of the fixed electrodes 39a to 39d.

[0080] Furthermore, when the operating unit 30 is pressed, the rotating body 31 and the pressing member 33 move backward together with the operating unit 30, and the pressure of the pressing member 33 turns the push switch on. Furthermore, when the pressing operation of the operating unit 30 is released, the operating unit 30, the rotating body 31, and the pressing member 33 return to their original positions by the return spring 34, thereby turning the push switch off. When the push switch is turned on, the fixed electrode 39d and the common electrode 39c are electrically connected, and when the push switch is turned off, the fixed electrode 39d and the common electrode 39c are electrically disconnected.

[0081] As described above, the fixed electrodes 39a, 39b are electrically connected to and disconnected from the common electrode 39c in response to the rotation of the operation unit 30. The electrical state (capacitance value) of each of the fixed electrodes 39a, 39b changes depending on whether the fixed electrodes 39a, 39b are electrically connected to and disconnected from the common electrode 39c. Similarly, the fixed electrode 39d is electrically connected to and disconnected from the common electrode 39c in response to the pressing of the operation unit 30. The electrical state (capacitance value) of the fixed electrode 39d changes depending on whether the fixed electrodes 39a, 39b, 39d are electrically connected to and disconnected from the common electrode 39c. When the fixed electrodes 39a, 39b, 39d are electrically connected to the common electrode 39c, the capacitance values ​​of each of the fixed electrodes 39a, 39b, 39d increase (change) by the capacitance value of the common electrode. In this way, the electrical state (e.g., capacitance value) of the fixed electrodes 39a, 39b, 39d changes depending on the operation of the operation unit 30.

[0082] (3-2-3) Details of the Touch Panel Sensor As shown in FIG. 12, the touch panel sensor 6 includes a plurality of first wiring electrodes X1, a plurality of second wiring electrodes Y1, film substrates 61 and 62, a drive circuit 64 (see FIG. 7), and a detection circuit 65 (see FIG. 7).

[0083] The film substrates 61 and 62 are formed into rectangular sheets using a transparent material (resin or glass).

[0084] The multiple first wiring electrodes X1 and the multiple second wiring electrodes Y1 are multiple sensor electrodes for detecting the position of an operator's touch on the front surface 6s of the touch panel sensor 6 (more precisely, the front surface 2s of the cover lens 2). The multiple first wiring electrodes X1 and the multiple second wiring electrodes Y1 are formed in a strip shape using a transparent conductive material (e.g., ITO (Indium Tin Oxide)). The multiple first wiring electrodes X1 extend parallel to each other along the short sides of the front surface 61s of the film substrate 61 and are arranged at intervals along the long sides of the front surface 61s. The multiple first wiring electrodes X1 are connected to a drive circuit 64 via a flexible printed wiring board 63. The multiple second wiring electrodes Y1 extend parallel to each other along the long sides of the front surface 62s of the film substrate 62 and are arranged along the short sides of the front surface 62s. The multiple second wiring electrodes Y1 are connected to a detection circuit 65 via the flexible printed wiring board 63.

[0085] The film substrate 61 and the film substrate 62 are superimposed on each other via an optically transparent adhesive sheet 66, and are thereby adhered to each other. In this adhered state, the plurality of second wiring electrodes Y1 intersect (are perpendicular to) the plurality of first wiring electrodes X1 when viewed from a direction perpendicular to the film substrates 61 and 62. The cover lens 2 is adhered to the front surface 62s of the film substrate 62 via the plurality of second wiring electrodes Y1 by the optically transparent adhesive sheet.

[0086] The drive circuit 64 (see FIG. 7) selectively applies a scanning voltage to the plurality of first wiring electrodes X1 one by one, from the first wiring electrode X1 at one end to the first wiring electrode X1 at the other end. The drive circuit 64 connects the remaining first wiring electrodes X1, to which the scanning voltage is not applied, to a reference potential (i.e., ground potential).

[0087] The detection circuit 65 (see FIG. 7 ) selectively detects the output voltage of each of the plurality of second wiring electrodes Y1, one by one, from the second wiring electrode Y1 at one end to the second wiring electrode Y1 at the other end, while a scanning voltage is applied to each first wiring electrode X1. This allows the detection circuit 65 to detect a second wiring electrode Y1 whose capacitance value has changed. That is, when an operator touches a given position on the front surface 6 s of the touch panel sensor 6, the output voltage (capacitance value) of the second wiring electrode Y1 overlapping the touched position changes. By detecting the change in the output voltage (capacitance value) of the second wiring electrode Y1 as described above, the detection circuit 65 detects the touched position on the front surface 6 s of the touch panel sensor 6 from the arrangement positions of the first wiring electrode X1 and the second wiring electrode Y1 selected at the time of detection. Hereinafter, this function of detecting a touched position will be referred to as a touch position detection function.

[0088] When the input device 3 is attached to the front surface 6s of the touch panel sensor 6 and the operation unit 30 of the input device 3 is operated (rotation operation or push operation), the detection circuit 65 detects the operation of the operation unit 30 using the touch position detection function.

[0089] More specifically, when the input device 3 is attached to the front surface 6s of the touch panel sensor 6, each of the fixed electrodes 39a to 39d faces at least one of the plurality of sensor electrodes (the plurality of first wiring electrodes X1 and the plurality of second wiring electrodes Y1). More specifically, each of the fixed electrodes 39a to 39d faces at least one of the plurality of first wiring electrodes X1 and faces at least one of the plurality of second wiring electrodes Y1. Each of the fixed electrodes 39a to 39d is capacitively coupled to the opposing sensor electrode. It is assumed that each of the fixed electrodes 39a to 39d does not face the same first wiring electrode X1.

[0090] When the operation unit 30 of the input device 3 is rotated, the fixed electrodes 39a, 39b alternately establish and interrupt electrical connection with the common electrode 39c. As a result, the capacitance values ​​of the fixed electrodes 39a, 39b alternately increase by the capacitance value of the common electrode 39c. As a result, the output voltage of the second wiring electrode Y1, which is capacitively coupled to the fixed electrodes 39a, 39b, alternately increases (changes) by the capacitance of the common electrode 39c. These changes in the output voltage of the second wiring electrode Y1 are detected by the touch position detection function of the touch panel sensor 6, thereby detecting whether the fixed electrodes 39a, 39b are in electrical connection with the common electrode 39c (i.e., the relative relationship (e.g., magnitude relationship) between the electrical states (capacitance values) of the fixed electrodes 39a, 39b). The detection circuit 65 then detects the rotational position of the operating unit 30 in time series based on the relative relationship between the detected electrical states of the fixed electrodes 39a, 39b, and detects the amount and direction of rotation of the operating unit 30 from this detection result.

[0091] Furthermore, when the operation unit 30 of the input device 3 is pressed, the fixed electrode 39d becomes conductive with the common electrode 39c. As a result, the capacitance value of the fixed electrode 39d increases by the capacitance value of the common electrode 39c. As a result, the output voltage of the second wiring electrode Y1, which is capacitively coupled to the fixed electrode 39d, increases (changes) by the capacitance of the common electrode 39c. This change in the output voltage of the second wiring electrode Y1 is detected by the touch position detection function of the touch panel sensor 6, thereby detecting whether the fixed electrode 39d is conductive with the common electrode 39c. The detection circuit 65 then detects the pressing operation of the operation unit 30 based on the output voltage of the second wiring electrode Y1, which is capacitively coupled to the fixed electrode 39d.

[0092] (4) Modifications Modifications of the above embodiment will be described below. The above embodiment and the modifications described below can be applied in appropriate combinations.

[0093] (4-1) Modification 1 In the above embodiment, the protective layer 23 is an anti-fingerprint layer, but the type of the protective layer 23 is not limited as long as it is a layer that protects the layer below the protective layer 23 (for example, the glass reinforced layer 22).

[0094] In the above embodiment, the glass reinforced layer 22 is disposed between the substrate body 21 (glass substrate) and the protective layer 23, but the glass reinforced layer 22 may be omitted. In this case, the protective layer 23 is provided on the front surface 21s of the substrate body 21. In addition, one or more functional layers having various functions different from those of the glass reinforced layer 22 may be disposed between the substrate body 21 and the protective layer 23.

[0095] (4-2) Modification 2 In the above application example, the input device 3 is configured to allow both a rotation operation and a push operation, but it is sufficient that the input device 3 is configured to allow at least one of a rotation operation and a push operation.

[0096] Furthermore, in the above application example, the input device 3 is configured to include the fixed electrodes 39a to 39d, but may be configured not to include the fixed electrodes 39a to 39d. In this case, the movable electrode 37b functions as the counter electrode 8. In this case, it is possible to detect an operation on the operation unit 30 of the input device 3 based on the distribution of the electrical states of the plurality of sensor electrodes (the plurality of first wiring electrodes X1 and the plurality of second wiring electrodes Y1) due to the relative positional relationship between the movable electrode 37b and the plurality of sensor electrodes.

[0097] (5) Aspects As is clear from the above-described embodiments and modifications, the present specification discloses the following aspects.

[0098] The adherend-attached substrate (1) of the first embodiment comprises a substrate (2) and an adherend (3). The adherend (3) is adhered to the front surface (2s) of the substrate (2) with an adhesive (4). The substrate (2) comprises a substrate main body (21) and a protective layer (23). The protective layer (23) is disposed on the front surface (21s) side of the substrate main body (21). The front surface (23s) of the protective layer (23) has a first region (23a) and a second region (23b). The first region (23a) is the region to which the adherend (3) is adhered with the adhesive (4), and has a first contact angle. The second region (23b) is a region other than the first region (23a), and has a second contact angle. The first contact angle is smaller than the second contact angle.

[0099] According to this configuration, the first contact angle of the first region (23a) on the front surface (23s) of the protective layer (23) is smaller than the second contact angle of the second region (23b). Therefore, when the adhesive (4) is applied to the first region (23a), it is possible to prevent numerous localized air layers (4a) from being mixed into the adhesive layer made of the adhesive (4). As a result, the adherend (3) can be firmly bonded to the first region (23a) of the front surface (23s) of the protective layer (23) by the adhesive (4).

[0100] The substrate (1) with an adherend of the second aspect is the first aspect, wherein the first contact angle is 90 degrees or less.

[0101] This configuration can prevent numerous localized air layers (4a) from being mixed into the adhesive layer made of the adhesive (4) in the first region (23a), thereby enabling the adhesive (4) to more firmly bond the adherend (3) to the first region (23a) of the protective layer (23).

[0102] In the third aspect of the adherend-attached substrate (1), in the first or second aspect, the front surface (23s) of the protective layer (23) has a processed step (D1) that makes the first region (23a) lower than the second region (23b). The processed step (D1) is smaller than the thickness of the protective layer (23) in the second region (23b).

[0103] This configuration prevents the lower layer of the protective layer (23) from being exposed and scraped off from the first region (23a) of the protective layer (23) due to the processing step (D1) between the first region (23a) and the second region (23b). As a result, the adherend (3) can be firmly bonded to the first region (23a) of the protective layer (23) with the adhesive (4) without affecting the lower layer of the protective layer (23) (for example, without impairing the function of the lower layer of the protective layer (23)).

[0104] In the fourth embodiment of the substrate (1) with an adherend, in any one of the first to third embodiments, the substrate body (21) is a glass substrate.

[0105] According to this configuration, when the substrate body (21) is a glass substrate, the adherend (3) can be firmly adhered to the first region (23a) of the front surface (23s) of the protective layer (23) by the adhesive (4).

[0106] The adherend-attached substrate (1) of the fifth aspect is the fourth aspect, further comprising a glass reinforced layer (22) provided between the substrate body (21) and the protective layer (23).

[0107] According to this configuration, when the substrate body (21) is a glass substrate, the substrate body (21) (glass substrate) can be strengthened by the glass strengthening layer (22).

[0108] In the sixth aspect of the substrate (1) with an adherend, in any one of the first to fifth aspects, the protective layer (23) is an antifouling layer that suppresses adhesion of dirt to the front surface of the layer below the protective layer (23).

[0109] According to this configuration, when the protective layer (23) is an antifouling layer, the adherend (3) can be firmly adhered to the first region (23a) of the front surface (23s) of the protective layer (23) by the adhesive (4).

[0110] In the seventh aspect of the substrate (1) with an adherend, in the sixth aspect, the protective layer (23) is made of a fluororesin, silicone, or fluorine-modified silane.

[0111] According to this configuration, when the protective layer (23) is made of a fluororesin, silicone, or fluorine-modified silane, the adherend (3) can be firmly adhered to the first region (23a) of the front surface (23s) of the protective layer (23) by the adhesive (4).

[0112] The adherend-attached substrate (1) of an eighth aspect is any one of the first to seventh aspects, further comprising a touch panel sensor (6). The touch panel sensor (6) is disposed on the rear surface (2b) of the substrate (2). The touch panel sensor (6) has a plurality of sensor electrodes (X1, Y1) for detecting the position of a touch by an operator on the front surface (2s) of the substrate (2). The adherend (3) is an input device (3) that accepts operation by the operator. The input device (3) has an operation unit (30) and a counter electrode (8). The operation unit (30) is displaced in response to operation by the operator. The counter electrode (8) faces at least one of the plurality of sensor electrodes (X1, Y1), and its electrical state changes in response to displacement of the operation unit (30).

[0113] According to this configuration, the input device (3) can be firmly attached with adhesive (4) to the front surface (2s) of the substrate (2) arranged on the front surface (6s) of the touch panel sensor (6).

[0114] In the ninth aspect of the substrate (1) with an adherend, the counter electrode (8) of the input device (3) in the eighth aspect includes a first fixed electrode (39a, 39b, 39d) and a second fixed electrode (39c) adhered to a first region (23a) of the front surface (2s) of the substrate (2) with an adhesive (4). The input device (3) further includes a movable electrode (37b). The movable electrode (37b) works in conjunction with the operation unit (30) to establish and block electrical continuity between the first fixed electrode (39a, 39b, 39d) and the second fixed electrode (39c).

[0115] According to this configuration, in a configuration in which the input device (3) has first fixed electrodes (39a, 39b, 39d), a second fixed electrode (39c), and a movable electrode (37b), the input device (3) can be firmly adhered with adhesive (4) to the front surface (2s) of the substrate (2) arranged on the front surface (6s) of the touch panel sensor (6).

[0116] In the tenth aspect of the substrate (1) with an adherend, in the eighth or ninth aspect, each of the plurality of sensor electrodes (X1, Y1) is capacitively coupled to the opposing counter electrode (8) and outputs an output voltage according to a change in the electrostatic capacitance value of the capacitively coupled counter electrode (8).

[0117] According to this configuration, the counter electrode (8) of the input device (3) and at least one of the multiple sensor electrodes (X1, Y1) of the touch panel sensor (6) are capacitively coupled. As described above, in this adherend-attached substrate (1), the adhesive layer that bonds the input device (3) to the protective layer (23) is substantially free of local air spaces (4a). This prevents the local air spaces (4a) from interfering with the capacitive coupling between the counter electrode (8) and the sensor electrodes (X1, Y1). As a result, the touch panel sensor (6) can effectively detect operations performed on the operation unit (30) of the input device (3).

[0118] The substrate (1) with an adherend of an eleventh aspect is any one of the eighth to tenth aspects, wherein the first region (23a) encloses the counter electrode (8) in a plan view from a direction perpendicular to the front surface (23s) of the protective layer (23).

[0119] According to this configuration, the entire counter electrode (8) of the input device (3) can be adhered to the first region (23a) of the protective layer (23) by the adhesive (4), thereby firmly adhering the input device (3) to the first region (23a).

[0120] REFERENCE SIGNS LIST 1 Substrate with adherend 2 Cover lens (substrate) 2s Front surface 3 Input device (adherend) 4 Adhesive 6 Touch panel sensor 6s Front surface 8 Counter electrode 21 Substrate body 21s Front surface 22 Reinforced glass layer 22s Front surface 23 Protective layer 23a First region 23b Second region 23s Front surface 30 Operation unit 37b Movable electrode 39a, 39b, 39d First fixed electrode 39c Second fixed electrode D1 Processing step X1 First wiring electrode (sensor electrode) Y1 Second wiring electrode (sensor electrode)

Claims

1. A substrate; an adherend attached to the front surface of the substrate with an adhesive; The substrate is A substrate body, a protective layer disposed on the front side of the substrate body; The front surface of the protective layer is a first region where the adherend is adhered with the adhesive, the first region having a first contact angle; a second region other than the first region, the second region having a second contact angle; The first contact angle is smaller than the second contact angle. Substrate with adherend.

2. The first contact angle is less than or equal to 90 degrees. The substrate with the adherend according to claim 1 .

3. The front surface of the protective layer has a processing step that makes the first region lower than the second region; The processing step is smaller than a thickness of the protective layer in the second region. The substrate with the adherend according to claim 1 or 2.

4. The substrate body is a glass substrate. The substrate with the adherend according to claim 1 or 2.

5. Further comprising a glass reinforced layer provided between the substrate body and the protective layer. The substrate with the adherend according to claim 4 .

6. The protective layer suppresses adhesion of dirt to the front surface of the layer below the protective layer. An antifouling layer, The substrate with the adherend according to claim 1 or 2.

7. The protective layer is a fluororesin, a silicone, or a fluorine-modified silane. The substrate with the adherend according to claim 6 .

8. a touch panel sensor disposed on a rear surface of the substrate and having a plurality of sensor electrodes for detecting a touch position of an operator on the front surface of the substrate; the adherend is an input device that accepts an operation by an operator, The input device is an operation unit that is displaced in response to the operation by the operator; a counter electrode that faces at least one of the plurality of sensor electrodes and whose electrical state changes in response to a displacement of the operation unit; The substrate with the adherend according to claim 1 or 2.

9. the counter electrode of the input device includes a first fixed electrode and a second fixed electrode bonded to the first region of the front surface of the substrate by the adhesive; The input device is The movable electrode is connected to the operation unit to establish and block electrical continuity between the first fixed electrode and the second fixed electrode. The substrate with the adherend according to claim 8 .

10. Each of the plurality of sensor electrodes is capacitively coupled to the opposing counter electrode, and outputs an output voltage according to a change in the electrostatic capacitance value of the capacitively coupled opposing electrode. The substrate with the adherend according to claim 8 .

11. In a plan view from a direction perpendicular to the front surface of the protective layer, the first region surrounds the counter electrode. The substrate with the adherend according to claim 8 .