Patent Publication Number: US-2015070600-A1

Title: Sensor device, method of manufacturing sensor device, display apparatus, and input apparatus

Description:
CROSS REFERENCES TO RELATED APPLICATIONS 
     The present application claims priority to Japanese Priority Patent Application JP2013-187592 filed in the Japan Patent Office on Sep. 10, 2013, the entire content of which is hereby incorporated by reference. 
     BACKGROUND 
     The present application relates to a sensor device, and a method of manufacturing the sensor device, as well as a display apparatus and an input apparatus each including the sensor device. 
     In recent years, portable information processing apparatuses represented by mobile phones have been made multifunctional, and many kinds of configurations in which a display section serves as a user interface have been proposed. For example, Japanese Unexamined Patent Application Publication No. 2011-170659 (JP2011-170659A) has proposed a sensor including a capacitor and capable of detecting an operated position and pressing force of an operation member, on an input operation surface. In JP2011-170659A, an elastic body is provided as an adhesive material between electrodes, so that capacity is changed by the pressing force. 
     SUMMARY 
     In general, an adhesive material has low elasticity, and deforms somewhat easily. Therefore, when the adhesive material is squashed by large pressure, it may take a considerably long time for the adhesive material to return to the original shape after unloading. In this case, a response speed of the sensor may decrease, which is disadvantageous. 
     It is desirable to provide a sensor device capable of reducing a decline in response speed, a method of manufacturing the sensor device, as well as a display apparatus and an input apparatus each including such a sensor device. 
     According to an embodiment of the present application, there is provided a sensor device including: a first base material and a second base material disposed apart to face each other; a plurality of first adhesion sections that are two-dimensionally arranged in a gap between the first base material and the second base material and have elasticity; and a mitigation section configured to mitigate an increase in contact area of each of the first adhesion sections to one of the first base material and the second base material, the contact area increasing as the gap narrows. 
     According to an embodiment of the present application, there is provided a display apparatus including: a display panel having a display surface; and a sensor device disposed on a side, opposite to the display surface, of the display panel, wherein the sensor device includes a first base material and a second base material disposed apart to face each other, a plurality of first adhesion sections that are two-dimensionally arranged in a gap between the first base material and the second base material and have elasticity, and a mitigation section configured to mitigate an increase in contact area of each of the first adhesion sections to one of the first base material and the second base material, the contact area increasing as the gap narrows. 
     According to an embodiment of the present application, there is provided an input apparatus including: a substrate having an operation surface; and a sensor device disposed on a side, which is opposite to the operation surface, of the substrate, wherein the sensor device includes a first base material and a second base material disposed apart to face each other, a plurality of first adhesion sections that are two-dimensionally arranged in a gap between the first base material and the second base material and have elasticity, and a mitigation section configured to mitigate an increase in contact area of each of the first adhesion sections to one of the first base material and the second base material, the contact area increasing as the gap narrows. 
     In the sensor device, the display apparatus, and the input apparatus according to the above-described embodiments of the present application, the mitigation section is provided. The mitigation section is configured to mitigate an increase in the area of contact between the first base material and the second base material, the area increasing as the gap between the first base material and the second base material narrows. This suppresses an increase in adhesion strength between each of the first adhesion sections and the first base material or the second base material when the gap between the first base material and the second base material is narrowed, as compared with a case in which the mitigation section is not provided. 
     According to an embodiment of the present application, there is provided a method of manufacturing a sensor device, the method including: increasing viscosity of each of a plurality of first adhesion sections, after printing, on a surface of a first base material, the first adhesion sections that are two-dimensionally arranged; providing a mitigation section on a surface of the first base material or a second base material, the mitigation section being configured to mitigate an increase in contact area of each of the first adhesion sections to one of the first base material and the second base material, the contact area increasing as a gap between the first base material and the second base material narrows, when the first base material and the second base material are adhered to each other, with each of the first adhesion sections interposed therebetween; and adhering the first base material and the second base material to each other, with each of the first adhesion sections interposed therebetween. 
     In the method of manufacturing the sensor device according to the above-described embodiment of the present application, the mitigation section is provided. The mitigation section is configured to mitigate an increase in the contact area of each of the first adhesion sections to one of the first base material and the second base material, the contact area increasing as the gap between the first base material and the second base material narrows. This suppresses an increase in adhesion strength between each of the first adhesion sections and the first base material or the second base material when the gap between the first base material and the second base material is narrowed, as compared with a case in which the mitigation section is not provided. 
     According to the sensor device, the method of manufacturing the sensor device, the display apparatus, and the input apparatus of the above-described embodiments of the present application, an increase in the above-described adhesion strength is suppressed. Therefore, it is possible to reduce time from unloading to returning of each of the first adhesion sections to the original shape. As a result, a decline in the response speed is allowed to be reduced. It is to be noted that effects of an embodiment of the present application are not necessarily limited to the effect described herein, and may be any of effects described in the present specification. 
     It is to be understood that both the foregoing general description and the following detailed description are exemplary, and are intended to provide further explanation of the technology as claimed. 
     Additional features and advantages are described herein, and will be apparent from the following Detailed Description and the figures. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
       The accompanying drawings are included to provide a further understanding of the present application, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and, together with the specification, serve to describe the principles of the technology. 
         FIG. 1  is a diagram illustrating an example of a cross-sectional configuration of a display apparatus according to a first embodiment of the present application. 
         FIG. 2  is a diagram illustrating an example of a cross-sectional configuration of the sensor device of  FIG. 1 , together with a schematic configuration of a drive unit. 
         FIG. 3  is a diagram illustrating an example of a perspective configuration of the sensor device of  FIG. 2 . 
         FIG. 4  is a diagram illustrating an example of function of the display apparatus. 
         FIG. 5  is a diagram illustrating another example of the function of the display apparatus. 
         FIG. 6A  is an enlarged view illustrating an example of a cross-sectional configuration of an adhesion section and a neighborhood thereof in the sensor device of  FIG. 2 . 
         FIG. 6B  is a diagram illustrating an example of an area of a contact part between an upper insulating layer and the adhesion section in  FIG. 6A . 
         FIG. 7A  is an enlarged view illustrating an example of a cross-sectional configuration of an adhesion section and a neighborhood thereof in the sensor device of  FIG. 2 . 
         FIG. 7B  is a diagram illustrating an example of an area of a contact part between an upper insulating layer and the adhesion section in  FIG. 7A . 
         FIG. 8A  is a diagram illustrating an example of a shape change of the adhesion section when the upper insulating layer of  FIG. 6A  is pressed. 
         FIG. 8B  is a diagram illustrating an example of an area of a contact part between the upper insulating layer and the adhesion section in  FIG. 8A . 
         FIG. 9A  is a diagram illustrating an example of a shape change of the adhesion section when the upper insulating layer of  FIG. 7A  is pressed. 
         FIG. 9B  is a diagram illustrating an example of the area of the contact part between the upper insulating layer and the adhesion section in  FIG. 9A . 
         FIG. 10A  is a diagram illustrating an example of a process in a method of manufacturing the sensor device. 
         FIG. 10B  is a diagram illustrating an example of a process following the process in  FIG. 10A . 
         FIG. 10C  is a diagram illustrating an example of a process following the process in  FIG. 10B . 
         FIG. 11  is a diagram illustrating an example of an apparatus evaluating a response speed of the sensor device. 
         FIG. 12  is a diagram illustrating another example of the apparatus evaluating the response speed of the sensor device. 
         FIG. 13  is a diagram illustrating an example of a response characteristic of the sensor device, together with a response characteristic of a sensor device according to a comparative example. 
         FIG. 14A  is a diagram illustrating an example of a cross-sectional configuration of the sensor device according to the comparative example. 
         FIG. 14B  is a diagram illustrating an example of an area of a contact part between an upper insulating layer and an adhesion section in  FIG. 14A . 
         FIG. 15A  is a diagram illustrating an example of a shape change of the adhesion section when the upper insulating layer of  FIG. 14A  is pressed. 
         FIG. 15B  is a diagram illustrating an example of the area of the contact part between the upper insulating layer and the adhesion section in  FIG. 15A . 
         FIG. 16A  is an enlarged view illustrating a modification of the cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device. 
         FIG. 16B  is a diagram illustrating an example of the area of the contact part between the upper insulating layer and the adhesion section in  FIG. 16A . 
         FIG. 17A  is a diagram illustrating an example of a shape change of the adhesion section when the upper insulating layer of  FIG. 16A  is pressed. 
         FIG. 17B  is a diagram illustrating an example of the area of the contact part between the upper insulating layer and the adhesion section in  FIG. 17A . 
         FIG. 18A  is an enlarged view illustrating a modification of the cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device. 
         FIG. 18B  is a diagram illustrating an example of the area of the contact part between the upper insulating layer and the adhesion section in  FIG. 18A . 
         FIG. 19A  is a diagram illustrating an example of a shape change of the adhesion section when the upper insulating layer of  FIG. 18A  is pressed. 
         FIG. 19B  is a diagram illustrating an example of the area of the contact part between the upper insulating layer and the adhesion section in  FIG. 19A . 
         FIG. 20  is a diagram illustrating an example of a process in a method of manufacturing the sensor device having a configuration of  FIG. 18A . 
         FIG. 21A  is a diagram illustrating an example of a plane configuration of a annular body of  FIG. 20 . 
         FIG. 21B  is a diagram illustrating an example of a plane configuration of the annular body of  FIG. 20 . 
         FIG. 22A  is a diagram illustrating an example of a process following the process in  FIG. 20 . 
         FIG. 22B  is a diagram illustrating an example of a process following the process in  FIG. 22A . 
         FIG. 22C  is a diagram illustrating an example of a process following the process in  FIG. 22B . 
         FIG. 23  is an enlarged view illustrating a modification of the cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device. 
         FIG. 24A  is a diagram illustrating an example of a process in a method of manufacturing the sensor device having a configuration of  FIG. 23 . 
         FIG. 24B  is a diagram illustrating an example of a process following the process in  FIG. 24A . 
         FIG. 24C  is a diagram illustrating an example of a process following the process in  FIG. 24B . 
         FIG. 24D  is a diagram illustrating an example of a process following the process in  FIG. 24C . 
         FIG. 25  is an enlarged view illustrating a modification of the cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device. 
         FIG. 26A  is an enlarged view illustrating a modification of the cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device. 
         FIG. 26B  is a diagram illustrating an example of the area of the contact part between the upper insulating layer and the adhesion section in  FIG. 26A . 
         FIG. 27A  is a diagram illustrating an example of a shape change of the adhesion section when the upper insulating layer of  FIG. 26A  is pressed. 
         FIG. 27B  is a diagram illustrating an example of the area of the contact part between the upper insulating layer and the adhesion section in  FIG. 27A . 
         FIG. 28  is a diagram illustrating an example of a process in a method of manufacturing the sensor device having a configuration of  FIG. 26A . 
         FIG. 29A  is a diagram illustrating an example of a plane configuration of a projection of  FIG. 28 . 
         FIG. 29B  is a diagram illustrating an example of a plane configuration of the projection of  FIG. 28 . 
         FIG. 30A  is a diagram illustrating an example of a process following the process in  FIG. 28 . 
         FIG. 30B  is a diagram illustrating an example of a process following the process in  FIG. 30A . 
         FIG. 30C  is a diagram illustrating an example of a process following the process in  FIG. 30B . 
         FIG. 31  is an enlarged view illustrating a modification of the cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device. 
         FIG. 32A  is an enlarged view illustrating a modification of the cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device. 
         FIG. 32B  is a diagram illustrating an example of an area of a contact part between the upper insulating layer and the adhesion section in  FIG. 32A . 
         FIG. 33A  is a diagram illustrating an example of a shape change of the adhesion section when the upper insulating layer of  FIG. 32A  is pressed. 
         FIG. 33B  is a diagram illustrating an example of the area of the contact part between the upper insulating layer and the adhesion section in  FIG. 33A . 
         FIG. 34  is an enlarged view illustrating a modification of the cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device. 
         FIG. 35  is a diagram illustrating a modification of the cross-sectional configuration of the sensor device of  FIG. 2 . 
         FIG. 36  is a diagram illustrating an example of a cross-sectional configuration of an input apparatus according to a second embodiment of the present application. 
         FIG. 37  is a diagram illustrating an example of a cross-sectional configuration of an input apparatus according to a third embodiment of the present application. 
         FIG. 38  is a diagram illustrating a modification of the cross-sectional configuration of the input apparatus of  FIG. 37 . 
         FIG. 39  is a diagram illustrating a specific but not limitative example of the cross-sectional configuration of the input apparatus of  FIGS. 37 and 38 . 
         FIG. 40  is a diagram illustrating a specific but not limitative example of the cross-sectional configuration of the input apparatus of  FIGS. 37 and 38 . 
         FIG. 41  is a diagram illustrating a modification of the cross-sectional configuration of the sensor device in each of the above-described embodiments. 
         FIG. 42A  is an enlarged view illustrating an example of a cross-sectional configuration of an adhesion section and a neighborhood thereof in the sensor device of  FIG. 41 . 
         FIG. 42B  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device of  FIG. 41 . 
         FIG. 42C  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device of  FIG. 41 . 
         FIG. 42D  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device of  FIG. 41 . 
         FIG. 42E  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device of  FIG. 41 . 
         FIG. 42F  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device of  FIG. 41 . 
         FIG. 42G  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device of  FIG. 41 . 
         FIG. 42H  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device of  FIG. 41 . 
         FIG. 42I  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device of  FIG. 41 . 
         FIG. 43  is a diagram illustrating a modification of the cross-sectional configuration of the sensor device in each of the above-described embodiments. 
         FIG. 44A  is an enlarged view illustrating an example of a cross-sectional configuration of an adhesion section and a neighborhood thereof in the sensor device of  FIG. 43 . 
         FIG. 44B  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device of  FIG. 43 . 
         FIG. 44C  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device of  FIG. 43 . 
         FIG. 44D  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device of  FIG. 43 . 
         FIG. 44E  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device of  FIG. 43 . 
         FIG. 44F  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device of  FIG. 43 . 
         FIG. 44G  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device of  FIG. 43 . 
         FIG. 44H  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device of  FIG. 43 . 
         FIG. 44I  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the sensor device of  FIG. 43 . 
         FIG. 45  is a diagram illustrating an example of a cross-sectional configuration of a passive device according to a fourth embodiment of the present application. 
         FIG. 46A  is an enlarged view illustrating an example of a cross-sectional configuration of an adhesion section and a neighborhood thereof in the passive device of  FIG. 45 . 
         FIG. 46B  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the passive device of  FIG. 45 . 
         FIG. 46C  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the passive device of  FIG. 45 . 
         FIG. 46D  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the passive device of  FIG. 45 . 
         FIG. 46E  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the passive device of  FIG. 45 . 
         FIG. 46F  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the passive device of  FIG. 45 . 
         FIG. 46G  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the passive device of  FIG. 45 . 
         FIG. 46H  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the passive device of  FIG. 45 . 
         FIG. 46I  is an enlarged view illustrating an example of a cross-sectional configuration of the adhesion section and the neighborhood thereof in the passive device of  FIG. 45 . 
     
    
    
     DETAILED DESCRIPTION 
     Some embodiments of the present application will be described below in detail with reference to the drawings. It is to be noted that the description will be provided in the following order. 
     1. First embodiment (a display apparatus) 
     An example in which a mitigation section is provided in an upper insulating layer 
     2. Modifications of the first embodiment 
     Variations on the Mitigation Section 
     3. Second embodiment (an input apparatus) 
     An example in which a substrate is provided in place of a display panel in the display apparatus of the above-described first embodiment 
     4. Third embodiment (an input apparatus) 
     An example in which a key region is provided in the substrate in the above-described second embodiment 
     5. Variations on the sensor device 
     5.1 Magnetic-type sensor device 
     5.2 Resistance-type sensor device 
     6. Fourth embodiment (a passive device) 
     1. First Embodiment 
     Configuration 
       FIG. 1  illustrates an example of a cross-sectional configuration of a display apparatus  1  according to a first embodiment of the present application. The display apparatus  1  displays an image on a display surface  10 A, and the display surface  10 A serves as an operation surface. The display apparatus  1  may include, for example, a display panel  10 , a sensor device  20 , a drive unit  30 , a pen  40 , and a resin layer  50 . 
     The display panel  10  displays an image on the display surface  10 A, and may be, for example, a panel such as a liquid crystal panel, an organic electro-luminescence (EL) panel, and an electrophoretic panel. The display panel  10  has flexibility, and may include, for example, a flexible resin film or a flexible sheet glass. The sensor device  20  detects a contact position or a pressed position of an object such as the pen  40 , on the display surface  10 A, and outputs a detection result (a detection signal) to the drive unit  30 . It is to be noted that the sensor device  20  will be described in detail later. 
     The drive unit  30  causes the display panel  10  to display an image on the display surface  10 A, by applying a voltage to the display panel  10 . Further, by applying a voltage to the sensor device  20 , the drive unit  30  drives the sensor device  20 , and receives the detection signal from the sensor device  20 . Furthermore, the drive unit  30  generates a voltage based on the received detection signal, and causes a change in display on the display surface  10 A by applying the generated voltage to the display panel  10 . The drive unit  30  may generate an image signal based on the received detection signal, and may output the generated image signal to outside. 
     The pen  40  is caused to touch or press the display surface  10 A. The sensor device  20  detects a contact position or a pressed position of the pen  40 , on the display surface  10 A. It is to be noted that the pen  40  may be omitted. In this case, a finger may be used in place of the pen  40 . 
     The resin layer  50  is provided to adhere the display panel  10  and the sensor device  20  to each other. The resin layer  50  may be configured of, for example, a sheet-like, spot-like, grid-like, or stripes-like adhesive layer or bonding layer. Examples of a material of the resin layer  50  may include: an acryl-based adhesive; an ethylene-vinyl acetate copolymer; a natural-rubber-based adhesive; a synthetic-rubber-based adhesive such as polyisobutylene, a butyl rubber, a styrene-butylene-styrene copolymer, and a styrene-isoprene-styrene-block copolymer; a polyurethane-based adhesive; a polyester-based adhesive; an epoxy-based adhesive; and a silicon-based adhesive. The resin layer  50  may have, for example, a thickness of about 0.5 μm to about 500 μm. 
     Next, the sensor device  20  will be described in detail.  FIG. 2  illustrates an example of a cross-sectional configuration of the sensor device  20 , together with a schematic configuration of the drive unit  30 .  FIG. 3  illustrates an example of a perspective configuration of the sensor device  20 . 
     The sensor device  20  is disposed at a position facing a surface, which is opposite to the display surface  10 A, of the display panel  10 . In other words, the sensor device  20  is not disposed on the display surface  10 A. The sensor device  20  detects a contact position or a pressed position of an object such as the pen  40 , on the display panel  10 . For example, the sensor device  20  may be of a capacity type, and may have a configuration in which an electrode substrate  23  is interposed between conductive layers  21  and  22  in an up-down direction. 
     The electrode substrate  23  and the conductive layer  22  have flexibility. The electrode substrate  23  may include, for example, an insulating layer  231 , a lower electrode  232 , a bonding layer  233 , an insulating layer  234 , an upper electrode  235 , a bonding layer  236 , and an insulating layer  237 , in this order from a conductive layer  21  side. For example, the sensor device  20  may have a gap between the conductive layer  21  and the electrode substrate  23 , and may have a plurality of adhesion sections  25  as a spacer that maintains this gap. The plurality of adhesion sections  25  are two-dimensionally arranged on a surface of the conductive layer  21 . For example, the sensor device  20  may have, between the conductive layer  22  and the electrode substrate  23 , an insulating layer  24  in contact with the conductive layer  22 . Further, for example, the sensor device  20  may also have a gap between the insulating layer  24  and the electrode substrate  23 , and may have a plurality of adhesion sections  26  as a spacer that maintains this gap. The plurality of adhesion sections  26  are two-dimensionally arranged on a surface of the insulating layer  237 . When viewed in a thickness direction of the sensor device  20 , the plurality of adhesion sections  25  and the plurality of adhesion sections  26  are arranged not to overlap each other. It is to be noted that, each of the adhesion sections  25  and  26  will be described in detail later. The conductive layer  21  or the insulating layer  237  is equivalent to a specific but not limitative example of “first base material” according to an embodiment of the present application. The insulating layer  231  or the insulating layer  24  is equivalent to a specific but not limitative example of “second base material” according to an embodiment of the present application. The adhesion section  25  is equivalent to a specific but not limitative example of “first adhesion section” according to an embodiment of the present application. The adhesion section  26  is also equivalent to a specific but not limitative example of “first adhesion section” according to an embodiment of the present application. 
     The conductive layers  21  and  22  each serve as a shield layer that prevents a variation in capacitance formed between the sensor device  20  and the outside from affecting inside of the sensor device  20 . The conductive layers  21  and  22  are at a fixed potential, for example, a ground potential. The conductive layers  21  and  22  may be configured of, for example, a metal plate made of metal such as SUS and iron. This metal plate may have flexibility. The conductive layers  21  and  22  may also be configured, for example, by forming, on a film, a metallic thin film made of metal such as aluminum, or a film of carbon, carbon nanotube (CNT), indium tin oxide (ITO), indium zinc oxide (IZO), a nano-metal wire, a silver fine wire, or the like. 
     The lower electrode  232  is disposed at a position facing the conductive layer  21 . The lower electrode  232  includes a plurality of partial electrodes extending in a predetermined direction (an X direction in  FIG. 2 ). The upper electrode  235  is disposed at a position facing the conductive layer  22 . The upper electrode  235  includes a plurality of partial electrodes extending in a direction (a Y direction in  FIG. 2 ) orthogonal to the lower electrode  232 . The lower electrode  232  and the upper electrode  235  may be configured, for example, by forming, on a film, a metallic thin film made of metal such as aluminum, or a film of carbon, CNT, ITO, IZO, a nano-metal wire, a silver fine wire, or the like. 
     The lower electrode  232  and the upper electrode  235  intersect each other when the sensor device  20  is viewed from a normal direction of the sensor device  20 . In an intersection part between the lower electrode  232  and the upper electrode  235 , a capacitor is formed using the lower electrode  232 , the bonding layer  233 , the insulating layer  234 , and the upper electrode  235 . This capacitor has a capacity that changes in response to a variation in capacitance according to a distance between the lower electrode  232  and the conductive layer  21 , or a variation in capacitance according to a distance between the upper electrode  235  and the conductive layer  22 . Therefore, the intersection part between the lower electrode  232  and the upper electrode  235  serves as a detection section  20   s  capable of detecting a change in the distance between the lower electrode  232  and the conductive layer  21 , or a change in the distance between the upper electrode  235  and the conductive layer  22 . The detection section  20   s  may be provided as each of a plurality of detection sections  20   s  that are two-dimensionally arranged in a plane. As illustrated in  FIG. 2 , the plurality of detection sections  20   s  may be positioned with uniform spacings in the plane, or may be positioned collectively in each predetermined region (for example, each region racing the adhesion sections  26 ). 
     The insulating layer  231  insulates and separates the conductive layer  21  and the lower electrode  232  from each other. The insulating layer  234  insulates and separates the lower electrode  232  and the upper electrode  235  from each other. The insulating layer  237  insulates and separates the upper electrode  235  and the conductive layer  22  from each other. The insulating layers  231 ,  234 ,  237 , and  24  may each be configured of, for example, a resin film having an insulation property. The insulating layers  231 ,  234 ,  237 , and  24  may also each be configured of, for example, a UV-curable or thermally-curable hard coating material or the like formed by screen printing. The insulating layers  231 ,  234 ,  237 , and  24  may also each be fabricated, for example, by patterning a spin-coated photosensitive resin through photolithography. The bonding layer  233  bonds the lower electrode  232  and the insulating layer  234  together. The bonding layer  236  bonds the upper electrode  235  and the insulating layer  234  together. The bonding layers  233  and  236  may each be formed, for example, by curing a UV-curable resin or a thermosetting resin. 
     The drive unit  30  generates drawing data based on an output of the sensor device  20 , and outputs the generated drawing data to the outside. As illustrated in  FIG. 2 , the drive unit  30  may have, for example, a detection circuit  31 , a computing section  32 , a storage section  33 , and an output section  34 . 
     For example, the detection circuit  31  may read a variation in capacitance of the sensor device  20 , based on a change in an amount of a current flowing in the electrode substrate  23 . The detection circuit  31  may have, for example, a switching element, a signal source, and a current-voltage conversion circuit. The switching element switches between a plurality of lower electrodes  232  each equivalent to the lower electrode  232  and a plurality of upper electrodes  235  each equivalent to the upper electrode  235 , included in the electrode substrate  23 . The signal source supplies an alternating current (AC) signal to the electrode substrate  23 . The switching element may be, for example, a multiplexer. Each of a plurality of terminals provided on one end side of the multiplexer is connected to one end of each of the lower electrodes  232  and one end of each of the upper electrodes  235 . One terminal provided on the other end side of the multiplexer is connected to the signal source and the current-voltage conversion circuit. 
     For example, the detection circuit  31  may select the plurality of lower electrodes  232  sequentially one by one, and may select the plurality of upper electrodes  235  sequentially one by one. The detection circuit  31  may thereby apply, for example, an AC signal to the plurality of lower electrodes  232  sequentially one by one, and to the plurality of upper electrodes  235  sequentially one by one. At this moment, for example, as illustrated in  FIGS. 4 and 5 , when the display surface  10 A is touched or pressed by the pen  40 , a variation in the capacitance of the electrode substrate  23  occurs, and this variation causes a change in the amount of a current flowing in the electrode substrate  23 . For example, the detection circuit  31  may convert the change in the amount of the current into a voltage change, and may output this voltage change to the computing section  32 . When the display surface  10 A is touched by the pen  40 , the electrode substrate  23  slightly deforms, which causes a variation in the capacitance of the electrode substrate  23 . It is to be noted that  FIG. 4  illustrates an example of a cross-sectional configuration of the sensor device  20  when the display surface  10 A is touched by the pen  40 .  FIG. 5  illustrates an example of a cross-sectional configuration of the sensor device  20  when the display surface  10 A is pressed by the pen  40 . 
     The computing section  32  detects a contact or pressed position of the pen  40  in the display surface  10 A, by evaluating the voltage change outputted from the detection circuit  31 . Further, the computing section  32  derives the magnitude of a press of the pen  40  in the display surface  10 A, by evaluating the voltage change outputted from the detection circuit  31 . The computing section  32  generates drawing data by superimposing derived position data (postscript data generated based on an output of the sensor device  20 ) on drawing data stored in the storage section  33 . The computing section  32  then stores the generated drawing data in the storage section  33 , and outputs the generated drawing data to the output section  34 . The storage section  33  stores the drawing data provided by the computing section  32 . The output section  34  outputs the drawing data provided by the computing section  32 , to the outside. 
     Next, each of the adhesion sections  25  and  26  as well as a peripheral configuration thereof will be described in detail.  FIG. 6A  illustrates an example of a cross-sectional configuration of the adhesion section  25  and a neighborhood thereof.  FIG. 6B  illustrates an example of an area of a contact part  231 B between the insulating layer  231  and the adhesion section  25 .  FIG. 7A  illustrates an example of a cross-sectional configuration of the adhesion section  26  and a neighborhood thereof.  FIG. 7B  illustrates an example of a contact part  24 B between the insulating layer  24  and the adhesion section  26 . 
     Each of the adhesion sections  25  is formed of an adhesive material having elasticity. Each of the adhesion sections  25  is in contact with the conductive layer  21  and the insulating layer  231 . Of each of the adhesion sections  25 , a top on the insulating layer  231  side is round, and may be shaped like, for example, a part of a sphere. The shape of this top may be formed, for example, by a method to be described later. The insulating layer  231  is shaped like a sheet, and has a depression  231 A as a mitigation section at a position facing each of the adhesion sections  25 . Here, the mitigation section refers to a section having a function of mitigating an increase in contact area of each of the adhesion sections  25  to the insulating layer  231 . This area increases as a gap between the conductive layer  21  and the insulating layer  231  narrows. 
     The depression  231 A may be, for example, formed by transferring the shape of a mold to a resin film. As with the adhesion section  25 , an inner surface of the depression  231 A is round, and may be shaped like, for example, a part of a sphere. Of the adhesion section  25 , the top on the insulating layer  231  side is fitted into the depression  231 A and is in contact with the inner surface of the depression  231 A. Of the top on the insulating layer  231  side, an entire round part may be preferably fitted into the depression  231 A. In this case, the area of the contact part  231 B between the insulating layer  231  and the adhesion section  25  is substantially equal to an area of the inner surface of the depression  231 A. 
     Each of the adhesion sections  26  is formed of an adhesive material having elasticity. Each of the adhesion sections  26  is in contact with the insulating layers  237  and  24 . Of each of the adhesion sections  26 , a top on the insulating layer  24  side is round, and may be shaped like, for example, a part of a sphere. The shape of this top may be formed, for example, by a method to be described later. The insulating layer  24  is shaped like a sheet, and has a depression  24 A as a mitigation section at a position facing each of the adhesion sections  26 . Here, the mitigation section refers to a section having a function of mitigating an increase in an area where each of the adhesion sections  26  is in contact with the insulating layer  24 . This area increases as a gap between the insulating layers  237  and  24  narrows. 
     The depression  24 A may be formed, for example, by transferring the shape of a mold to a resin film. As with the adhesion section  26 , the depression  24 A is round, and may be shaped like, for example, a part of a sphere. Of the adhesion section  26 , the top on the insulating layer  24  side is fitted into the depression  24 A and is in contact with an inner surface of the depression  24 A. Of the top on the insulating layer  24  side, an entire round part may be preferably fitted into the depression  24 A. In this case, the area of the contact part  24 B between the insulating layer  24  and the adhesion section  26  is substantially equal to an area of the inner surface of the depression  24 A. 
       FIG. 8A  illustrates an example of a shape change of the adhesion section  25  when the insulating layer  231  is pressed.  FIG. 8B  illustrates an example of the area of the contact part  231 B between the insulating layer  231  and the adhesion section  25 , when the insulating layer  231  is pressed.  FIG. 9A  illustrates an example of a shape change of the adhesion section  26  when the insulating layer  24  is pressed.  FIG. 9B  illustrates an example of the area of the contact part  24 B between the insulating layer  24  and the adhesion section  26 , when the insulating layer  24  is pressed. 
     When the insulating layer  231  is pressed, the adhesion section  25  is squashed by receiving pressure from the insulating layer  231  in a thickness direction. A gap G between the insulating layer  231  and the conductive layer  21  becomes narrower than the gap G before the pressing. Here, of the adhesion section  25 , the top on the insulating layer  231  side is fitted into the depression  231 A. Therefore, the area of the contact part  231 B between the adhesion section  25  and the insulating layer  231  hardly differs from the area before the pressing, and the adhesion section  25  is flattened. Subsequently, upon being unloaded, the flattened adhesion section  25  returns to the original shape, by restoring force thereof. 
     When the insulating layer  24  is pressed, the adhesion section  26  is squashed by receiving pressure from the insulating layer  24  in a thickness direction. A gap G between the insulating layers  24  and  237  becomes narrower than the gap G before the pressing. Here, of the adhesion section  26 , the top on the insulating layer  24  side is fitted into the depression  24 A. Therefore, the area of the contact part  24 B between the adhesion section  26  and the insulating layer  24  hardly differs from the area before the pressing, and the adhesion section  26  is flattened. Subsequently, upon being unloaded, the flattened adhesion section  26  returns to the original shape by restoring force thereof. 
     Each of the adhesion sections  25  is formed by printing on the surface of the conductive layer  21 . Similarly, each of the adhesion sections  26  is formed by printing on the surface of the insulating layer  237 . For example, each of the adhesion sections  25  and each of the adhesion sections  26  may be formed by printing a heat-sensitive adhesive material. The heat-sensitive adhesive material is then heated (or warmed), irradiated with ultraviolet rays, or cured by moisture, so that adhesiveness of the heat-sensitive adhesive material develops. Alternatively, each of the adhesion sections  25  and each of the adhesion sections  26  may be formed, for example, by printing an electron-beam sensitive adhesive material. The electron-beam sensitive adhesive material is then irradiated with an electron beam, so that adhesiveness of the electron-beam sensitive adhesive material develops. Here, the heat-sensitive adhesive material refers to a material in which adhesiveness is absent at ambient temperature, but the adhesiveness develops by heating (or warming), ultraviolet irradiation, or moisture curing. The heat-sensitive adhesive material may include, for example, crystal adhesive materials and tackifiers, and the adhesiveness may develop when the crystal is melted by heating (or warming). In addition, the electron-beam sensitive adhesive refers to a material in which adhesiveness is absent at ambient temperature, but the adhesiveness develops by molecular chain cutting caused by electron beam irradiation. 
     [Manufacturing Method] 
       FIG. 10A  illustrates an example of a process in a method of manufacturing the sensor device  20 .  FIG. 10B  illustrates an example of a process following the process in  FIG. 10A , and  FIG. 10C  illustrates an example of a process following the process in  FIG. 10B . First, the plurality of adhesion sections  25 A arranged two-dimensionally are printed on the surface of the conductive layer  21  ( FIG. 10A ). Similarly, the plurality of adhesion sections  26 A arranged two-dimensionally are printed on the surface of the insulating layer  237  ( FIG. 10A ). The adhesion sections  25 A and  26 A may be formed, for example, of the heat-sensitive adhesive material or the electron-beam sensitive adhesive material, and have weak or no adhesive strength at this stage. It is to be noted that, in  FIG. 10A , the adhesion sections  25 A and  26 A are each a rectangular parallelepiped, but the top of each of the adhesion sections  25 A and  26 A may be round to some degree, depending on the way of printing. 
     Next, a treatment of increasing viscosity of each of the adhesion sections  25 A and  26 A is performed. For example, the viscosity of each of the adhesion sections  25 A and  26 A may be increased by heating, ultraviolet irradiation, moisture curing, or electron beam irradiation, to form each of the adhesion sections  25  and  26 . In this process, each of the adhesion sections  25  and  26  temporarily softens, and the top of each of the adhesion sections  25  and  26  becomes round due to surface tension ( FIG. 10B ). Subsequently, the insulating layer  231 , in which the depression  231 A serving as the mitigation section is formed, and the conductive layer  21  are adhered to each other, with the adhesion section  25  interposed therebetween ( FIG. 10C ). In this process, the top of the adhesion section  25  is fitted into the depression  231 A. Similarly, the insulating layer  24 , in which the depression  24 A serving as the mitigation section is formed, and the insulating layer  237  are adhered to each other, with the adhesion section  26  interposed therebetween ( FIG. 10C ). In this process, the top of the adhesion section  26  is fitted into the depression  24 A. The sensor device  20  is thus manufactured. 
     [Effects] 
     Next, effects of the sensor device  20  will be described by comparison with a comparative example. 
       FIGS. 11 and 12  each illustrate an example of an apparatus that evaluates a response speed of the sensor device  20 .  FIG. 11  illustrates an example of using a laser displacement gauge  200  that measures a displacement of a surface of the sensor device  20 .  FIG. 12  illustrates an example of using an evaluation apparatus  220  that measures a displacement of the surface of the sensor device  20 . 
     The laser displacement gauge  200  measures a displacement of the surface of the sensor device  20 , by irradiating the surface of the sensor device  20  with a laser beam L, and measuring a phase change of a reflected light of the laser beam L. For example, the laser displacement gauge  200  may measure a displacement of the surface of the unloaded sensor device  20  over time, after a state in which the surface of the sensor device  20  is pressed by a jig  210 . 
     The evaluation apparatus  220  may be, for example, connected to the lower electrode  232  and the upper electrode  235  of the sensor device  20  through a flexible printed circuit (FPC). For example, the evaluation apparatus  220  may apply a voltage to the sensor device  20 , and may measure a displacement of the surface of the sensor device  20  by utilizing a change in an output from the sensor device  20 . For example, the evaluation apparatus  220  may measure a displacement of the surface of the unloaded sensor device  20  over time, after a state in which the surface of the sensor device  20  is pressed by the jig  210 . 
       FIG. 13  illustrates an example of a response characteristic of the sensor device  20 , together with a response characteristic of a sensor device according to the comparative example. In  FIG. 13 , a horizontal axis represents the time, and a vertical axis represents the displacement of the surface of the sensor device  20 . A surface position of the sensor device  20  when the jig  210  is not in contact with the surface of the sensor device  20  is an origin point of the vertical axis. A solid line in  FIG. 13  is a result of a change with time in a displacement of the surface of the sensor device  20 . A dashed line in  FIG. 13  is a result of a change with time in a surface displacement of the sensor device according to the comparative example. 
     As illustrated in  FIG. 13 , the surface position of the sensor device  20  quickly returns to the original position at the time of unloading, as compared with the surface position of the sensor device according to the comparative example. In other words, the response speed of the sensor device  20  is considerably higher than a response speed of the sensor device according to the comparative example. One reason for this will be described below, together with a configuration of the sensor device according to the comparative example. 
       FIG. 14A  is an enlarged view illustrating an example of a cross-sectional configuration of an adhesion section  120  and a neighborhood thereof in the sensor device according to the comparative example.  FIG. 14B  illustrates an example of an area of a contact part  110 A between an insulating layer  110  and the adhesion section  120  in the sensor device according to the comparative example.  FIG. 15A  illustrates an example of a shape change of the adhesion section  120  when the insulating layer  110  is pressed.  FIG. 15B  illustrates an example of the area of the contact part  110 A between the insulating layer  110  and the adhesion section  120  when the insulating layer  110  is pressed. It is to be noted that the sensor device according to the comparative example is equivalent to the sensor device  20  when the adhesion section  120  is provided in place of the adhesion section  25  or  26 , and the insulating layer  110  is provided in place of the insulating layer  231  or  24 , in the sensor device  20 . 
     Each of the adhesion sections  120  is formed of an adhesive material having elasticity, as with the adhesion sections  25  and  26 . Each of the adhesion sections  120  is in contact with the conductive layer  21  (or the insulating layer  237 ) and the insulating layer  110 . Of each of the adhesion sections  120 , a top on the insulating layer  110  side is round, and may be shaped like, for example, a part of a sphere. The insulating layer  110  is shaped like a sheet, and has a position facing each of the adhesion sections  120  is a flat surface. The area of the contact part  110 A between the insulating layer  110  and the adhesion section  120  is considerably small, as compared with the areas of the contact parts  231 B and  24 B. 
     When the insulating layer  110  is pressed, the adhesion section  120  is squashed by receiving pressure from the insulating layer  110  in a thickness direction. A gap G between the insulating layer  110  and the conductive layer  21  (or the insulating layer  237 ) is narrower than the gap G before the pressing. The round top of the adhesion section  120  is squashed and flattened. Therefore, the area of the contact part  110 A greatly changes, as compared with the area before the pressing. Subsequently, upon being unloaded, the flattened adhesion section  120  returns to the original shape by restoring force thereof. At this moment, the restoring force of the adhesion section  120  is resisted by adhesive strength on the top of the adhesion section  120 . In general, an adhesive material has low elasticity, and a restoration speed of the adhesive material is greatly influenced by adhesive strength thereof. Therefore, the restoration speed of the flattened adhesion section  120  is lowered by resistance of the adhesive strength on the top of the adhesion section  120 . For this reason, it takes a considerably long time for the adhesion section  120  to return to the original shape. 
     In contrast, in the sensor device  20 , the area of the contact part  231 B between the adhesion section  25  and the insulating layer  231 , and the area of the contact part  24 B between the adhesion section  26  and the insulating layer  24  hardly differ from those before the pressing. In the sensor device  20 , as compared with a case in which the depressions  231 A and  24 A each serving as the mitigation section are not provided, an increase in adhesion strength between the adhesion section  25  and the insulating layer  231  and between the adhesion section  26  and the insulating layer  24  when the gap G is reduced is suppressed. Therefore, the restoration speeds of the flattened adhesion sections  25  and  26  are not resisted by the adhesive strength on the tops of the adhesion sections  25  and  26 , respectively. Hence, the adhesion sections  25  and  26  each return to the original shape in a considerably short time. Accordingly, as compared with the comparative example, it is possible to reduce time from unloading to returning of each of the adhesion sections  25  and  26  to the original shape. Accordingly, it is possible to reduce a decline in the response speed. 
     In addition, in the sensor device  20 , of the adhesion sections  25  and  26 , the tops on the insulating layers  231  and  24  sides are fitted into the depressions  231 A and  24 A, respectively, and are in contact with the inner surfaces of the depressions  231 A and  24 A, respectively. This makes it possible to increase the area of the contact part  231 B between the insulating layer  231  and the adhesion section  25 , as compared with the comparative example. As a result, as compared with the comparative example, it is possible to reduce a possibility of peeling of the adhesion sections  25  and  26  off the insulating layers  231  and  24 , respectively. 
     2. Modifications of First Embodiment 
     Next, modifications of the sensor device  20  of the above-described embodiment will be described. 
     [Modification 1] 
       FIG. 16A  is an enlarged view of a modification of the cross-sectional configuration of each of the adhesion sections  25  and  26  as well as a neighborhood thereof in the sensor device  20  of the above-described embodiment.  FIG. 16B  illustrates an example of each of the area of the contact part  231 B between the insulating layer  231  and the adhesion section  25 , and the area of the contact part  24 B between the insulating layer  24  and the adhesion section  25 , in  FIG. 16A . 
     In the present modification, each of the adhesion sections  25  is in contact with the conductive layer  21  and the insulating layer  231 . Of each of the adhesion sections  25 , the top on the insulating layer  231  side is round, and may be shaped like, for example, a part of a sphere. The insulating layer  231  has the depression  231 A as the mitigation section, at a position facing each of the adhesion sections  25 . The depression  231 A may be formed, for example, by transferring the shape of a mold to a resin film. The depression  231 A is annular. In the insulating layer  231 , a central part of the depression  231 A has a projection that is surrounded by the inner surface of the depression  231 A. For example, each of the adhesion sections  25  may be in contact with the projection formed in the central part of the depression  231 A. In this case, the area of the contact part  231 B between the insulating layer  231  and the adhesion section  25  is substantially equal to an area of a top surface of the projection formed in the central part of the depression  231 A. 
     In the present modification, each of the adhesion sections  26  is in contact with the insulating layers  237  and  24 . Of each of the adhesion sections  26 , the top on the insulating layer  24  side is round, and may be shaped like, for example, a part of a sphere. The insulating layer  24  has the depression  24 A as the mitigation section, at a position facing each of the adhesion sections  26 . The depression  24 A may be formed, for example, by transferring the shape of a mold to a resin film. The depression  24 A is annular. In the insulating layer  24 , a central part of the depression  24 A has a projection that is surrounded by the inner surface of the depression  24 A. For example, each of the adhesion sections  26  may be in contact with the projection formed in the central part of the depression  24 A. In this case, the area of the contact part  24 B between he insulating layer  24  and the adhesion section  26  is substantially equal to an area of a top surface of the projection formed in the central part of the depression  24 A. 
       FIG. 17A  illustrates an example of each of a shape change of the adhesion section  25  when the insulating layer  231  is pressed, and a shape change of the adhesion section  26  when the insulating layer  24  is pressed.  FIG. 17B  illustrates an example of each of the area of the contact part  231 B between the insulating layer  231  and the adhesion section  25  when the insulating layer  231  is pressed, and the area of the contact part  24 B between the insulating layer  24  and the adhesion section  26  when the insulating layer  24  is pressed. 
     When the insulating layer  231  is pressed, the adhesion section  25  is squashed by receiving pressure from the insulating layer  231  in a thickness direction. The gap G between the insulating layer  231  and the conductive layer  21  becomes narrower than the gap G before the pressing. At this moment, a part of the adhesion section  25  enters the depression  231 A, and the depression  231 A suppresses an increase in the area of the contact part  231 B between the adhesion section  25  and the insulating layer  231 . When an outer diameter of the depression  231 A is equal to a diameter of the adhesion section  25 , for example, as illustrated in  FIGS. 17A and 17B , an outer edge of the depression  231 A and the adhesion section  25  may be in contact with each other. Therefore, the outer diameter of the depression  231 A may be preferably larger than the diameter of the adhesion section  25 . 
     When the insulating layer  24  is pressed, the adhesion section  26  is squashed by receiving pressure from the insulating layer  24  in a thickness direction. The gap G between the insulating layers  24  and  237  becomes narrower than the gap G before the pressing. At this moment, a part of the adhesion section  26  enters the depression  24 A, and the depression  24 A suppresses an increase in the area of the contact part  24 B between the adhesion section  26  and the insulating layer  24 . When an outer diameter of the depression  24 A is equal to a diameter of the adhesion section  26 , for example, as illustrated in  FIGS. 17A and 17B , an outer edge of the depression  24 A and the adhesion section  26  may be in contact with each other. Therefore, the outer diameter of the depression  24 A may be preferably larger than the diameter of the adhesion section  26 . 
     In the present modification, in the sensor device  20 , the area of the contact part  231 B between the adhesion section  25  and the insulating layer  231 , and the area of the contact part  24 B between the adhesion section  26  and the insulating layer  24  each hardly differ from the area before the pressing. As compared with a case in which the depressions  231 A and  24 A each serving as the mitigation section are not provided, an increase in the adhesion strength when the gap G is reduced is suppressed. The adhesion strength is built between the adhesion section  25  and the insulating layer  231  and between the adhesion section  26  and the insulating layer  24 . Therefore, the restoration speeds of the flattened adhesion sections  25  and  26  are not resisted by the adhesive strength on the tops of the adhesion sections  25  and  26 , respectively. Hence, the adhesion sections  25  and  26  each return to the original shape in a considerably short time. Therefore, as compared with the above-described comparative example, it is possible to reduce the time from unloading to returning of each of the adhesion sections  25  and  26  to the original shape. Accordingly, it is possible to reduce a decline in the response speed. 
     [Modification 2] 
       FIG. 18A  is an enlarged view of a modification of the cross-sectional configuration of each of the adhesion sections  25  and  26  as well as a neighborhood thereof in the sensor device  20  of the above-described embodiment.  FIG. 18B  illustrates an example of the area of each of the contact part  231 B between the insulating layer  231  and the adhesion section  25 , and the contact part  24 B between the insulating layer  24  and the adhesion section  26 , in  FIG. 18A . 
     In the present modification, the sensor device  20  has a plurality of convex annular bodies  27  as an mitigation section, on the surface of each of the conductive layer  21  and the insulating layer  237 . The annular body  27  is provided for each of the adhesion sections  25  and each of the adhesion sections  26 . Each of the adhesion sections  25  is in contact with the conductive layer  21  and the insulating layer  231 . Each of the adhesion sections  26  is in contact with the insulating layers  237  and  24 . Each of the adhesion sections  25  is in contact with the surface of the conductive layer  21 , through an opening  27 A of the annular body  27 , as well as the annular body  27 . Each of the adhesion sections  26  is in contact with the surface of the insulating layer  237 , through the opening  27 A of the annular body  27 , as well as the annular body  27 . 
     Of the adhesion sections  25  and  26 , the round tops on the insulating layers  231  and  24  sides are suppressed to be flattened by the annular body  27 , in a process of manufacturing the sensor device  20 . Therefore, of the adhesion sections  25  and  26 , the tops on the insulating layers  231  and  24  sides are flat or substantially flat. Each of the annular bodies  27  is formed by printing on the surface of the conductive layer  21  and the insulating layer  237 . The annular body  27  has a height less than a height of each of the adhesion sections  25  and  26 . For example, the area of the contact part  231 B between the insulating layer  231  and the adhesion section  25 , and the area of the contact part  24 B between the insulating layer  24  and the adhesion section  26  may be substantially equal to cross-sectional areas of the adhesion sections  25  and  26 , respectively. 
       FIG. 19A  illustrates an example of each of a shape change of the adhesion section  25  when the insulating layer  231  is pressed, and a shape change of the adhesion section  26  when the insulating layer  24  is pressed.  FIG. 19B  illustrates an example of each of the area of the contact part  231 B between the insulating layer  231  and the adhesion section  25  when the insulating layer  231  is pressed, and the area of the contact part  24 B between the insulating layer  24  and the adhesion section  26  when the insulating layer  24  is pressed. 
     When the insulating layers  231  and  24  are pressed, and the adhesion sections  25  and  26  are squashed by receiving pressure from the insulating layers  231  and  24 , respectively, in a thickness direction. The gap G between the insulating layer  231  and the conductive layer  21  or between the insulating layers  24  and  237  becomes narrower than the gap G before the pressing. Of the adhesion sections  25  and  26 , the tops on the insulating layers  231  and  24  sides, respectively, are flat or substantially flat and therefore do not have or hardly have roundness, even before the pressing. Therefore, there is almost no change between the areas of the contact parts  231 B and  24 B before the pressing and the areas of the contact parts  231 B and  24 B after the pressing. As compared with a case in which the annular body  27  is not provided, an increase in the adhesion strength between the adhesion section  25  and the insulating layer  231  and between the adhesion section  26  and the insulating layer  24  when the gap G is reduced is suppressed. Therefore, the restoration speeds of the flattened adhesion sections  25  and  26  are not resisted by the adhesive strength on the tops of the adhesion sections  25  and  26 , respectively. Hence, the adhesion sections  25  and  26  each return to the original shape in a considerably short time. Therefore, as compared with the comparative example, it is possible to reduce the time from unloading to returning of each of the adhesion sections  25  and  26  to the original shape. Accordingly, it is possible to reduce a decline in the response speed. 
       FIG. 20  illustrates an example of a process in a method of manufacturing the sensor device  20 .  FIGS. 21A and 21B  each illustrate an example of a plane configuration of the annular body  27 .  FIGS. 22A ,  22 B and  22 C illustrate an example of a process following the process in  FIG. 20 . 
     First, the plurality of annular bodies  27  two-dimensionally arranged are printed on the surface of each of the conductive layer  21  and the insulating layer  237  ( FIG. 20 ). The annular body  27  may be shaped like, for example, a ring as illustrated in  FIG. 21A , or may be shaped like, for example, a rhombic ring as illustrated in  FIG. 21B . The annular body  27  is configured of a printable resin-based material. A height of the annular body  27  and a diameter of the opening  27 A may be preferably set at values by which depressions  25 B and  26 B that may be formed on the tops of the adhesion sections  25  and  26  are allowed to become as shallow as possible, when a treatment of increasing viscosity to be described later is performed. 
     Next, the plurality of adhesion sections  25 A two-dimensionally arranged are printed on the surface of the conductive layer  21  ( FIG. 22A ). Specifically, the plurality of adhesion sections  25 A are each printed on a part, which is exposed inside the opening  27 A of each of the annular bodies  27 , of the conductive layer  21 . The plurality of adhesion sections  25 A are each printed also on a surface, which is adjacent to this part, of the annular body  27 . Similarly, the plurality of adhesion sections  26 A two-dimensionally arranged are printed on the surface of the insulating layer  237  ( FIG. 22A ). Specifically, the plurality of adhesion sections  26 A are each printed on a part, which is exposed inside the opening  27 A of each of the annular bodies  27 , of the insulating layer  237 . The plurality of adhesion sections  26 A are each printed also on a surface, which is adjacent to this part, of the annular body  27 . It is to be noted that, in  FIG. 22A , the adhesion sections  25 A and  26 A are square-cornered, but the tops of the adhesion sections  25 A and  26 A may be slightly rounded, depending on the way of printing, in some cases. 
     Next, the treatment of increasing viscosity of each of the adhesion sections  25 A and  26 A is performed. For example, the viscosity of each of the adhesion sections  25 A and  26 A may be increased by heating, ultraviolet irradiation, moisture curing, or electron beam irradiation, to form the adhesion sections  25  and  26 . In this process, the adhesion sections  25  and  26  become temporarily soft, so that the tops of the adhesion sections  25  and  26  become flat due to surface tension ( FIG. 22B ). Next, the flat insulating layer  231  without the depression  231 A and the conductive layer  21  are adhered to each other, with the adhesion section  25  interposed therebetween ( FIG. 22C ). Similarly, the flat insulating layer  24  without the depression  24 A and the insulating layer  237  are adhered to each other, with the adhesion section  26  interposed therebetween ( FIG. 22C ). The sensor device  20  is thus manufactured. 
     In the present modification, the adhesion sections  25 A and  26 A as well as the annular body  27  are formed by printing. Therefore, it possible to reduce a decline in the response speed by a simple manufacturing method, as compared with the case in which the depressions  231 A and  24 A are provided in the insulating layers  231  and  24 , respectively. 
     [Modification 3] 
       FIG. 23  is an enlarged view of a modification of the cross-sectional configuration of each of the adhesion sections  25  and  26  as well as a neighborhood thereof in the sensor device  20  of the above-described embodiment. 
     The sensor device  20  of the present modification is equivalent to the sensor device  20  according to Modification 2 further provided with a prevention layer  28 . The prevention layer  28  prevents wet spread of the adhesion sections  25 A and  26 A from reaching a peripheral edge of the annular body  27 , in a process of manufacturing the sensor device  20 . The prevention layer  28  is provided to be in contact with an outer edge of the annular body  27 , and a part, which surrounds the annular body  27 , of each of the conductive layer  21  and the insulating layer  231 . 
       FIG. 24A  illustrates an example of a process in a method of manufacturing the sensor device  20 .  FIG. 24B  illustrates an example of a process following the process in  FIG. 24A .  FIG. 24C  illustrates an example of a process following the process in  FIG. 24B .  FIG. 24D  illustrates an example of a process following the process in  FIG. 24C . 
     First, the plurality of annular bodies  27  two-dimensionally arranged are formed by printing on the surface of each of the conductive layer  21  and the insulating layer  237  ( FIG. 24A ). Next, on the surface of each of the conductive layer  21  and the insulating layer  237 , the prevention layer  28  is printed. Specifically, the prevention layer  28  is formed to be in contact with the outer edge of the annular body  27 , and the part, which surrounds the annular body  27 , of each of the conductive layer  21  and the insulating layer  231 . 
     Next, the plurality of adhesion sections  25 A two-dimensionally arranged are formed by printing on the surface of the conductive layer  21  ( FIG. 24B ). Specifically, the plurality of adhesion sections  25 A are each printed on a part, which is exposed inside the opening  27 A of each of the annular bodies  27 , of the conductive layer  21 . The plurality of adhesion sections  25 A are each printed also on a surface, which is adjacent to this part, of the annular body  27 . Similarly, the plurality of adhesion sections  26 A two-dimensionally arranged are printed on the surface of the insulating layer  237  ( FIG. 24B ). Specifically, the plurality of adhesion sections  26 A are each printed on a part, which is exposed inside the opening  27 A of each of the annular bodies  27 , of the insulating layer  237 . The plurality of adhesion sections  26 A are each printed also on a surface, which is adjacent to this part, of the annular body  27 . 
     Next, the treatment of increasing viscosity of each of the adhesion sections  25 A and  26 A is performed. For example, the viscosity of each of the adhesion sections  25 A and  26 A may be increased by heating, ultraviolet irradiation, moisture curing, or electron beam irradiation, to form the adhesion sections  25  and  26 . In this process, the adhesion sections  25  and  26  become temporarily soft, so that the tops of the adhesion sections  25  and  26  become flat due to surface tension ( FIG. 24C ). In addition, in this process, wet spread of the adhesion sections  25 A and  26 A is prevented from reaching the peripheral edge of the annular body  27 , by the effect of the prevention layer  28 . Next, the flat insulating layer  231  without the depression  231 A and the conductive layer  21  are adhered to each other, with the adhesion section  25  interposed therebetween ( FIG. 24D ). Similarly, the flat insulating layer  24  without the depression  24 A and the insulating layer  237  are adhered to each other, with the adhesion section  26  interposed therebetween ( FIG. 24D ). The sensor device  20  is thus manufactured. 
     In the present modification, the prevention layer  28  is provided to prevent wet spread of the adhesion sections  25 A and  26 A from reaching the peripheral edge of the annular body  27 , in the process of manufacturing the sensor device  20 . This makes it possible to control flatness of the top surfaces of the adhesion sections  25  and  26  more easily, in the process of manufacturing the sensor device  20 . 
     [Modification 4] 
       FIG. 25  is an enlarged view of a modification of the cross-sectional configuration of each of the adhesion sections  25  and  26  as well as a neighborhood thereof in the sensor device  20  of the above-described embodiment. 
     In the present modification, the sensor device  20  has the plurality of convex annular bodies  27  provided on each of the insulating layers  231  and  24 , as the mitigation section. The annular body  27  is provided for each of the adhesion sections  25  and  26 . In other words, the sensor device  20  of the present modification is equivalent to the sensor device  20  of Modification 2 provided with the plurality of convex annular bodies  27  on the surface of each of the insulating layers  231  and  24 . Each of the adhesion sections  25  is in contact with the conductive layer  21  and the insulating layer  231 . Each of the adhesion sections  26  is in contact with the insulating layers  237  and  24 . Each of the adhesion sections  25  is in contact with the surface of the insulating layer  231 , through the opening  27 A of the annular body  27 , as well as the annular body  27 . Each of the adhesion sections  26  is in contact with the surface of the insulating layer  24 , through the opening  27 A of the annular body  27 , as well as the annular body  27 . The annular body  27  fills a gap between the adhesion section  25  having a round top on the insulating layer  231  side and the insulating layer  231 , and a gap between the adhesion section  26  having a round top on the insulating layer  24  side and the insulating layer  24 , in a process of manufacturing the sensor device  20 . For example, the area of a contact part between the insulating layer  231  with the annular body  27  and the adhesion section  25 , and the area of a contact part between the insulating layer  24  with the annular body  27  and the adhesion section  26  may be substantially equivalent to a cross-sectional area of the adhesion section  25  and a cross-sectional area of the adhesion section  26 , respectively. 
     In the sensor device  20  of the present modification, the area of the contact part between the insulating layer  231  with the annular body  27  and the adhesion section  25 , and the area of the contact part between the insulating layer  24  with the annular body  27  and the adhesion section  26  hardly differ from those areas before the pressing. Between the adhesion section  25  and the insulating layer  231  with the annular body  27 , and between the adhesion section  26  and the insulating layer  24  with the annular body  27 , an increase in the adhesion strength when the gap G is reduced is suppressed, as compared with a case in which the annular body  27  serving as the mitigation section is not provided. Therefore, the restoration speeds of the flattened adhesion sections  25  and  26  are not resisted by the adhesive strength on the tops of the adhesion sections  25  and  26 . Hence, the adhesion sections  25  and  26  each return to the original shape in a considerably short time. Therefore, as compared with the above-described comparative example, it is possible to reduce the time from unloading to returning of each of the adhesion sections  25  and  26  to the original shape. Accordingly, it is possible to reduce a decline in the response speed. 
     [Modification 5] 
       FIG. 26A  is an enlarged view of a modification of the cross-sectional configuration of each of the adhesion sections  25  and  26  as well as a neighborhood thereof in the sensor device  20  of the above-described embodiment.  FIG. 26B  illustrates an example of the area of each of the contact part  231 B between the insulating layer  231  and the adhesion section  25 , and the contact part  24 B between the insulating layer  24  and the adhesion section  26 , in  FIG. 26A . 
     In the present modification, the sensor device  20  has a plurality of projections  61  as the mitigation section. The plurality of projections  61  are each provided at a position on the surface of each of the conductive layer  21  and the insulating layer  237 , without being in contact with each of the adhesion sections  25  and  26 . Each of the adhesion sections  25  is in contact with the conductive layer  21  and the insulating layer  231 . Each of the adhesion sections  26  is in contact with the insulating layers  237  and  24 . For example, each of the adhesion sections  25  and each of the adhesion sections  26  may have a round top on the insulating layer  231  side and a round top on the insulating layer  24  side, respectively. Each of the adhesion sections  25  and  26  are not in contact with each of the projections  61 , and there is a clearance between each of the projections  61  and each of the adhesion sections  25  and  26 . Each of the projections  61  controls the gap G. For example, each or each plurality of the projections  61  may be allocated to each of the adhesion sections  25  and  26 . When external force, which reduces the gap G between the conductive layer  21  and the insulating layer  231  and between the insulating layers  237  and  24 , is applied to none of the insulating layers  24 ,  231 ,  237  and the conductive layer  21 , each of the projections  61  is in contact with only each of the conductive layer  21  and the insulating layer  237 . In other words, when a pressing force is not applied to the sensor device  20 , there is a clearance between the top of each of the projections  61  and each of the insulating layers  231  and  24 . Each of the projections  61  has non-adhesiveness. Therefore, when being brought into contact with the insulating layer  231 , each of the projections  61  does not adhere thereto, and similarly, when being brought into contact with the insulating layer  24 , each of the projections  61  does not adhere thereto. Each of the projections  61  is formed on the surface of the conductive layer  21  or the insulating layer  237  by printing. 
       FIG. 27A  illustrates an example of a shape change of the adhesion section  25  when the insulating layer  231  is pressed or a shape change of the adhesion section  26  when the insulating layer  24  is pressed.  FIG. 27B  illustrates an example of the area of the contact part  231 B between the insulating layer  231  and the adhesion section  25  when the insulating layer  231  is pressed, or the area of the contact part  24 B between the insulating layer  24  and the adhesion section  26  when the insulating layer  24  is pressed. 
     When the insulating layers  231  and  24  are pressed, the adhesion sections  25  and  26  are squashed by receiving pressure in a thickness direction, from the insulating layers  231  and  24 , respectively. The gap G between the insulating layer  231  and the conductive layer  21  or between the insulating layers  24  and  237  becomes narrower than the gap G before the pressing. The gap G is controlled by each of the projections  61 , not to become narrower than a height of each of the projections  61 . Amounts of depression in the adhesion sections  25  and  26  by the insulating layers  231  and  24 , respectively, are each limited by each of the projections  61 . Therefore, as compared with a case in which a limit by each of the projections  61  is not provided, a difference between the area of the contact part  231 B after the pressing and that before the pressing and a difference between the area of the contact part  24 B after the pressing and that before the pressing are small. An increase in the adhesion strength between the adhesion section  25  and the insulating layer  231  and between the adhesion section  26  and the insulating layer  24  when the gap G is reduced is suppressed. Therefore, the restoration speeds of the flattened adhesion sections  25  and  26  are not much resisted by the adhesive strength on the tops of the adhesion sections  25  and  26 , respectively. Hence, the adhesion sections  25  and  26  each return to the original shape in a relatively short time. Therefore, as compared with the above-described comparative example, it is possible to reduce the time from unloading to returning of each of the adhesion sections  25  and  26  to the original shape. Accordingly, it is possible to reduce a decline in the response speed. 
       FIG. 28  illustrates an example of a process in a method of manufacturing the sensor device  20 .  FIGS. 29A and 29B  each illustrate an example of a plane configuration of the projection  61 .  FIG. 30A  illustrates an example of a process following the process in  FIG. 28 ,  FIG. 30B  illustrates an example of a process following the process in  FIG. 30A , and  FIG. 30C  illustrates an example of a process following the process in  FIG. 30B . 
     First, the plurality of projections  61  two-dimensionally arranged are printed on the surface of each of the conductive layer  21  and the insulating layer  237  ( FIG. 28 ). The projections  61  may each be, for example, shaped like a dot as illustrated in  FIG. 29A , or may each be, for example, annular as illustrated in  FIG. 29B . The projection  61  may be configured of a printable resin-based material. The projection  61  may be preferably disposed at a position not to be in contact with each of the adhesion sections  25  and  26  even when the sensor device  20  is pressed. 
     Next, the plurality of adhesion sections  25 A two-dimensionally arranged are printed on the surface of the conductive layer  21  ( FIG. 30A ). Specifically, the plurality of adhesion sections  25 A are each printed on a surface, which is adjacent to each of the projections  61 , of the conductive layer  21 , or on a part, which is exposed inside an opening of each of the projections  61 , of the conductive layer  21 . Similarly, the plurality of adhesion sections  26 A two-dimensionally arranged are printed on the surface of the insulating layer  237  ( FIG. 30A ). Specifically, the plurality of adhesion sections  26 A are each printed on a surface, which is adjacent to each of the projections  61 , of the insulating layer  237 , or on a part, which is exposed inside the opening of each of the projections  61 , of the insulating layer  237 . It is to be noted that, in  FIG. 30A , the adhesion sections  25 A and  26 A are square-cornered, but the tops of the adhesion sections  25 A and  26 A may be slightly rounded, depending on the way of printing, in some cases. 
     Next, the treatment of increasing viscosity of each of the adhesion sections  25 A and  26 A is performed. For example, the viscosity of each of the adhesion sections  25 A and  26 A may be increased by heating, ultraviolet irradiation, moisture curing, or electron beam irradiation, to form the adhesion sections  25  and  26 . In this process, the adhesion sections  25  and  26  become temporarily soft, so that the tops of the adhesion sections  25  and  26  become flat due to surface tension ( FIG. 30B ). Next, the flat insulating layer  231  without the depression  231 A and the conductive layer  21  are adhered to each other, with the adhesion section  25  interposed therebetween ( FIG. 30C ). Similarly, the flat insulating layer  24  without the depression  24 A and the insulating layer  237  are adhered to each other, with the adhesion section  26  interposed therebetween ( FIG. 30C ). The sensor device  20  is thus manufactured. 
     In the sensor device  20  of the present modification, the area of the contact part between the adhesion section  25  and the insulating layer  231 , and the area of the contact part between the adhesion section  26  and the insulating layer  24  hardly differ from those areas before the pressing. As compared with a case in which the projections  61  serving as the mitigation section are not provided, an increase in adhesion strength between the adhesion section  25  and the insulating layer  231  and between the adhesion section  26  and the insulating layer  24  when the gap G is reduced is suppressed. Therefore, the restoration speeds of the flattened adhesion sections  25  and  26  are not much resisted by the adhesive strength on the tops of the adhesion sections  25  and  26 , respectively. Hence, the adhesion sections  25  and  26  each return to the original shape in a relatively short time. Therefore, as compared with the above-described comparative example, it is possible to reduce the time from unloading to returning of each of the adhesion sections  25  and  26  to the original shape. Accordingly, it is possible to reduce a decline in the response speed. 
     [Modification 6] 
       FIG. 31  is an enlarged view of a modification of the cross-sectional configuration of each of the adhesion sections  25  and  26  as well as a neighborhood thereof in the sensor device  20  of the above-described embodiment. 
     In the present modification, the sensor device  20  has the plurality of projections  61  as the mitigation section. The plurality of projections  61  are provided on the surface of each of the insulating layers  231  and  24 , and are each provided for each of the adhesion sections  25  and  26 . In other words, the sensor device  20  of the present modification is equivalent to the sensor device  20  of the modification 5 in which the plurality of projections  61  are each provided at a position on the surface of each of the insulating layers  231  and  24 , without being in contact with each of the adhesion sections  25  and  26 . Each of the projections  61  is formed by printing on the surface of each of the insulating layers  231  and  24 . For example, each or each plurality of the projections  61  may be allocated to each of the adhesion sections  25  and  26 . When external force, which reduces the gap G between the conductive layer  21  and the insulating layer  231  and the gap G between the insulating layers  237  and  24 , is applied to none of the insulating layers  24 ,  231 ,  237  and the conductive layer  21 , each of the projections  61  is in contact with only each of the insulating layers  231  and  24 . In other words, when a pressing force is not applied to the sensor device  20 , there is a clearance between the top of each of the projections  61  and the conductive layer  21  or the insulating layer  231 . Each of the projections  61  has non-adhesiveness. Therefore, when being brought into contact with the conductive layer  21 , each of the projections  61  does not adhere thereto, and similarly, when being brought into contact with the insulating layer  237 , each of the projections  61  does not adhere thereto. 
     In the sensor device  20  of the present modification, the area of the contact part between the adhesion section  25  and the insulating layer  231 , and the area of the contact part between the adhesion section  26  and the insulating layer  24  hardly differ from those areas before the pressing. As compared with a case in which the projections  61  serving as the mitigation section are not provided, an increase in adhesion strength between the adhesion section  25  and the insulating layer  231  and between the adhesion section  26  and the insulating layer  24  when the gap G is reduced is suppressed. Therefore, the restoration speeds of the flattened adhesion sections  25  and  26  are not much resisted by the adhesive strength on the tops of the adhesion sections  25  and  26 . Hence, the adhesion sections  25  and  26  each return to the original shape in a relatively short time. Therefore, as compared with the above-described comparative example, it is possible to reduce the time from unloading to returning of each of the adhesion sections  25  and  26  to the original shape. Accordingly, it is possible to reduce a decline in the response speed. 
     [Modification 7] 
       FIG. 32A  is an enlarged view of a modification of the cross-sectional configuration of each of the adhesion sections  25  and  26  as well as a neighborhood thereof in the sensor device  20  of the above-described embodiment.  FIG. 32B  illustrates an example of the area of each of a contact part  231 C between the insulating layer  231  and an adhesion section  29  to be described later, and a contact part  24 C between the insulating layer  24  and the adhesion section  29 , in  FIG. 32A . 
     In the present modification, the sensor device  20  has a plurality of adhesion sections  29  having elasticity as the mitigation section. The adhesion sections  29  are provided on the surface of each of the insulating layers  231  and  24 . The adhesion section  29  is equivalent to a specific but not limitative example of “second adhesion section” according to one embodiment of the present application. Each of the adhesion sections  29  is disposed between the insulating layer  231  and the adhesion section  25 , and is in contact with the insulating layer  231  and the top of the adhesion section  25 . Similarly, each of the adhesion sections  29  is disposed between the insulating layer  24  and the adhesion section  26 , and is in contact with the insulating layer  24  and the top of the adhesion section  26 . Each of the adhesion sections  29  is formed by printing on the surface of each of the insulating layers  231  and  24 . Each of the adhesion sections  25  is formed by printing on the surface of the conductive layer  21 . Each of the adhesion sections  26  is formed by printing on the surface of the insulating layer  237 . 
     Each of the adhesion sections  29  is formed of an adhesive material having elasticity. Each of the adhesion sections  29  has a round top on the adhesion section  25  side and the adhesion section  26  side, and may be shaped like, for example, a part of a sphere. The adhesion sections  25 ,  26 , and  29  each have the round top and therefore, an area of a contact part  29 A between the adhesion section  29  and each of the adhesion sections  25  and  26  is slightly smaller than each of the contact parts  231 C and  24 C, respectively. Each of the adhesion sections  29  may be formed, for example, by printing a heat-sensitive adhesive material. The heat-sensitive adhesive material is then heated (or warmed), irradiated with ultraviolet rays, or cured by moisture, so that adhesiveness of the heat-sensitive adhesive material develops. Further, each of the adhesion sections  29  may be formed, for example, by printing an electron-beam sensitive adhesive material. The electron-beam sensitive adhesive material is then irradiated with an electron beam, so that adhesiveness of the electron-beam sensitive adhesive material develops. 
       FIG. 33A  illustrates an example of a shape change of each of the adhesion sections  25 ,  26 , and  29  when the insulating layers  231  and  24  are pressed.  FIG. 33B  illustrates an example of each of the area of the contact part  231 C between the insulating layer  231  and the adhesion section  29 , and the area of the contact part  24 C between the insulating layer  24  and the adhesion section  29 . 
     When the insulating layers  231  and  24  are pressed, the adhesion sections  25 ,  26 , and  29  are squashed by receiving pressure from the insulating layers  231  and  24 , respectively, in a thickness direction. The gap G between the insulating layer  231  and the conductive layer  21  and the gap G between the insulating layers  24  and  237  become narrower than those gaps G before the pressing. Of the adhesion sections  25  and  26 , the tops on the insulating layers  231  and  24  sides, respectively, are flat or substantially flat and therefore do not have or hardly have roundness. Hence, the area of the contact part  29 A after the pressing is slightly larger than the area of the contact part  29 A before the pressing. On the other hand, there is almost no change between the areas of the contact parts  231 C and  24 C before the pressing and those after the pressing. 
     Here, a change in the area of the contact part  29 A does not much influence the restoration speeds of the adhesion sections  25  and  26 . In addition, the restoration speeds of the flattened adhesion sections  25 ,  26 , and  29  are not resisted by the adhesive strength at bottoms of the adhesion sections  25 ,  26 , and  29 . Hence, the adhesion sections  25 ,  26 , and  29  each return to the original shape in a considerably short time. Therefore, as compared with the above-described comparative example, it is possible to reduce the time from unloading to returning of each of the adhesion sections  25 ,  26 , and  29  to the original shape. Accordingly, it is possible to reduce a decline in the response speed. 
     [Modification 8] 
       FIG. 34  is an enlarged view of a modification of the cross-sectional configuration of each of the adhesion sections  25  and  26  as well as a neighborhood thereof in the sensor device  20  of the above-described embodiment. 
     In the present modification, the sensor device  20  has the plurality of annular bodies  27  and the plurality of projections  61  as the mitigation section, on the surface of each of the conductive layer  21  and the insulating layer  237 . In other words, the sensor device  20  of the present modification is equivalent to the sensor device  20  of Modification 2 provided with the plurality of projections  61  at positions on the surface of each of the conductive layer  21  and the insulating layer  237 , without being in contact with each of the adhesion sections  25  and  26 . 
     In the sensor device  20  of the present modification, the areas of the contact parts  231 B and  24 B after the pressing hardly differ from the areas of the contact parts  231 B and  24 B before the pressing. In addition, as compared with a case in which the annular bodies  27  and the projections  61  are not provided, an increase in adhesion strength between the adhesion section  25  and the insulating layer  231  and between the adhesion section  26  and the insulating layer  24  when the gap G is reduced is suppressed. Therefore, the restoration speeds of the flattened adhesion sections  25  and  26  are not resisted by the adhesive strength on the tops of the adhesion sections  25  and  26 , respectively. Hence, the adhesion sections  25  and  26  each return to the original shape in a considerably short time. Therefore, as compared with the above-described comparative example, it is possible to reduce the time from unloading to returning of each of the adhesion sections  25  and  26  to the original shape. Accordingly, it is possible to reduce a decline in the response speed. 
     [Modification 9] 
       FIG. 35  illustrates a modification of the cross-sectional configuration of the sensor device  20  according to each of the above-described embodiment and modifications (Modifications 1 to 8). The sensor device  20  of the present modification is equivalent to the sensor device  20  according to each of the above-described embodiment and modifications (Modifications 1 to 8) from which the adhesive section  26  and the insulating layer  24  formed near the display panel  10  are removed. In this case, it is possible to reduce the thickness of the sensor device  20 , as compared with the sensor device  20  according to each of the above-described embodiment and modifications (Modifications 1 to 8). 
     [Modification 10] 
     In each of the above-described embodiment and modifications (Modifications 1 to 8), the mitigation section is provided for both of the adhesive sections  25  and  26 . However, the mitigation section may be provided for only one of the adhesive section  25  and the adhesive section  26 . 
     3. Second Embodiment 
       FIG. 36  illustrates an example of a cross-sectional configuration of an input apparatus  2  according to a second embodiment of the present application. The input apparatus  2  is equivalent to the display apparatus  1  including the sensor device  20  according to each of the above-described embodiment and modifications (Modifications 1 to 10) provided with a substrate  60  in place of the display panel  10 . 
     The substrate  60  has an operation surface  60 A. The substrate  60  may be, for example, an opaque resin plate having flexibility or an opaque metal plate having flexibility. The sensor device  20  detects a contact position or a pressed position of an object such as the pen  40  on the operation surface  60 A, and outputs a detection result (a detection signal) to the drive unit  30 . 
     By applying a voltage to the sensor device  20 , the drive unit  30  drives the sensor device  20 , and receives the detection signal from the sensor device  20 . Further, the drive unit  30  generates an image signal based on the received detection signal, and outputs the generated image signal to outside. The pen  40  is caused to touch or press the operation surface  60 A. The sensor device  20  detects a contact position or a pressed position of the pen  40 , on the operation surface  60 A. It is to be noted that the pen  40  may be omitted. In this case, a finger may be used in place of the pen  40 . 
     Next, effects of the input apparatus  2  of the present embodiment will be described. In the present embodiment, the mitigation section is provided for the sensor device  20  in a manner similar to the above-described embodiment. Therefore, as compared with the above-described comparative example, it is possible to reduce the time from unloading to returning of each of the adhesion sections  25  and  26  (or the adhesion sections  25 ,  26 , and  29 ) to the original shape. Accordingly, it is possible to reduce a decline in the response speed. 
     4. Third Embodiment 
       FIGS. 37 and 38  each illustrate an example of a cross-sectional configuration of an input apparatus  3  according to a third embodiment of the present application. The input apparatus  3  is equivalent to the above-described input apparatus  2  in which a plurality of key regions  60 B are provided for the substrate  60  in the input apparatus  2 . The input apparatus  3  serves as a keyboard apparatus. 
     The plurality of key regions  60 B are arranged on the operation surface  60 A. Each of the key regions  60 B is equivalent to a key top to be pressed through operation by a user, and has a shape and size depending on the type of a key. In each of the key regions  60 B, appropriate key display may be provided. In this key display, the type of a key, or the position (an outline) of each key, or both may be displayed. For the display, it is possible to adopt an appropriate printing technique. For example, screen printing, flexographic printing, or gravure printing may be adopted. 
     For example, the operation surface  60 A may be configured of a flat surface as illustrated in  FIG. 37 , or may have a groove between the key regions  60 B as illustrated in  FIG. 38 . For example, the key region  60 B may be preferably arranged at a position facing the detection section  20   s  as illustrated in each of  FIGS. 39 and 40 . 
     Next, effects of the input apparatus  3  of the present embodiment will be described. In the present embodiment, the mitigation section is provided for the sensor device  20  in a manner similar to the above-described embodiments. Therefore, as compared with the above-described comparative example, it is possible to reduce the time from unloading to returning of each of the adhesion sections  25  and  26  (or the adhesion sections  25 ,  26 , and  29 ) to the original shape. Accordingly, it is possible to reduce a decline in the response speed. 
     5. Variations on Sensor Device 
     [5.1 Magnetic-Type Sensor Device] 
       FIG. 41  illustrates an example of a cross-sectional configuration of a magnetic-type sensor device  70 . The sensor device  70  is allowed to be used in place of the sensor device  20 , in the display apparatus  1  according to the above-described first embodiment and modifications (Modifications 1 to 10), the input apparatus  2 , and the input apparatus  3  each including the sensor device  20 . 
     The sensor device  70  may include, for example, a shield layer  72  and an insulating layer  73  in this order on a substrate  71 . The sensor device  70  may further include, for example, a plurality of giant magneto resistance (GMR) elements  74  and a plurality of adhesion sections  75 . The GMR elements  74  may be two-dimensionally arranged on the surface of the insulating layer  73 . The adhesion sections  75  may each be disposed at a position on the surface of the insulating layer  73  and in proximity to the GMR element  74 . The sensor device  70  may further include, for example, a substrate  76 , a shield layer  77 , and a plurality of magnetic layers  78 . The substrate  76  may be disposed to face the insulating layer  73  with a predetermined gap therebetween. The shield layer  77  may be disposed on a top surface of the substrate  76 . The magnetic layers  78  may each be disposed on an undersurface of the substrate  76 , at a position facing the GMR element  74 . 
     The substrate  71  may be, for example, a glass substrate, a silicon substrate, or an alumina substrate. The shield layer  72  may be formed of, for example, permalloy. The insulating layer  73  may be formed of, for example, alumina or silicon oxide. The GMR element  74  may be an element in which electric resistance is changed by an external magnetic field generated by the magnetic layer  78 . It is to be noted that a magnetoresistive effect element such as a tunnel magneto resistance (TMR) element may be provided in place of the GMR element  74 . 
     The substrate  76  may be, for example, a silicon substrate. The shield layer  77  may be formed of, for example, permalloy. The magnetic layer  78  applies a magnetic field to the GMR element  74 , and may be formed of, for example, an alloy such as a CoPt alloy and CoCrPt alloy. The adhesion section  75  is configured in a manner similar to that of the above-described adhesion section  25 . 
     Each of the adhesion sections  75  is formed of an adhesive material having elasticity. Each of the adhesion sections  75  is in contact with the insulating layer  73  and the substrate  76 . Of each of the adhesion sections  75 , a top on the substrate  76  side is round, and may be shaped like, for example, a part of a sphere. For example, the shape of this top may be formed by a method similar to the method of forming the above-described adhesion section  25 . The substrate  76  is shaped like a sheet, and has a depression  76 A as a mitigation section, at a position facing each of the adhesion sections  75 . Here, the mitigation section refers to a section having a function of mitigating an increase in an area where each of the adhesion sections  75  is in contact with the substrate  76 . This area increases as the gap between the insulating layer  73  and the substrate  76  narrows. 
     The depression  76 A may be formed, for example, by selectively etching the silicon substrate. As illustrated in  FIG. 42A , for example, the depression  76 A may be round in a manner similar to that of the adhesion section  75 , and may be shaped like, for example, a part of a sphere. Of the adhesion section  75 , the top on the substrate  76  side is fitted into the depression  76 A, and is in contact with an inner surface of the depression  76 A. An entire round part of the top on the substrate  76  side may be preferably fitted into the depression  76 A. In this case, an area of a contact part between the substrate  76  and the adhesion section  75  is substantially equal to an area of the inner surface of the depression  76 A. 
     It is to be noted that the sensor device  70  may be, for example, configured as illustrated in each of  FIGS. 42B to 42I . The adhesion section  75  and the substrate  76  illustrated in  FIG. 42B  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 16A , respectively. The adhesion section  75  and the substrate  76  illustrated in  FIG. 42C  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 18A , respectively. The adhesion section  75  and the substrate  76  illustrated in  FIG. 42D  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 23 , respectively. The adhesion section  75  and the substrate  76  illustrated in in  FIG. 42E  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 25 , respectively. The adhesion section  75  and the substrate  76  illustrated in  FIG. 42F  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 26A , respectively. The adhesion section  75  and the substrate  76  illustrated in  FIG. 42G  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 31 , respectively. The adhesion section  75  and the substrate  76  illustrated in  FIG. 42H  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 32A , respectively. The adhesion section  75  and the substrate  76  illustrated in  FIG. 42I  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 34 , respectively. 
     Next, effects of an apparatus including the sensor device  70  will be described. This apparatus is configured by providing the sensor device  70  in place of the sensor device  20 , in the display apparatus  1  according to the above-described first embodiment and modifications (Modifications 1 to 10), the input apparatus  2 , and the input apparatus  3  each including the sensor device  20 . In the present embodiment, the mitigation section is provided for the sensor device  70  in a manner similar to the above-described embodiments. Therefore, as compared with the above-described comparative example, it is possible to reduce the time from unloading to returning of each of the adhesion sections  25  and  26  (or the adhesion sections  25 ,  26 , and  29 ) to the original shape. Accordingly, it is possible to reduce a decline in the response speed. 
     [5.2 Resistance-Type Sensor Device] 
       FIG. 43  illustrates an example of a cross-sectional configuration of a resistance-type sensor device  80 . The sensor device  80  is allowed to be used in place of the sensor device  20 , in the display apparatus  1  according to the above-described first embodiment and modifications (Modifications 1 to 10), the input apparatus  2 , and the input apparatus  3  each including the sensor device  20 . 
     The sensor device  80  may include, for example, a lower electrode  82  on a substrate  81 . The sensor device  80  may further include, for example, a plurality of adhesion sections  83  arranged two-dimensionally on a surface of the lower electrode  82 . The sensor device  80  may further include, for example, a substrate  84  and an upper electrode  85 . The substrate  84  may be disposed to face the lower electrode  82  with a predetermined gap therebetween. The lower electrode  82  may be disposed on an undersurface of the substrate  84 . The lower electrode  82  is equivalent to a specific but not limitative example of “first wiring” according to one embodiment of the present application. The upper electrode  85  is equivalent to a specific but not limitative example of “second wiring” according to one embodiment of the present application. 
     The substrate  81  may be, for example, a glass substrate or a resin substrate. The lower electrode  82  and the upper electrode  85  may be each formed of, for example, a metallic material such as Al and Cu. 
     Each of the adhesion sections  83  is formed of an adhesive material having elasticity and conductivity. Each of the adhesion sections  83  is in contact with the lower electrode  82  and the upper electrode  85 . Of each of the adhesion sections  83 , a top on the substrate  84  side is round, and may be shaped like, for example, a part of a sphere. For example, the shape of this top may be formed by a method similar to the method of forming the above-described adhesion section  25 . The substrate  84  is shaped like a sheet, and has a depression  84 A as a mitigation section, at a position facing each of the adhesion sections  83 . Here, the mitigation section refers to a section having a function of mitigating an increase in an area where each of the adhesion sections  83  is in contact with the upper electrode  85 . This area increases as the gap between the lower electrode  82  and the upper electrode  85  narrows. 
     The depression  84 A may be, for example, formed by transferring the shape of a mold to a resin film. As illustrated in  FIG. 44A , for example, as with the adhesion section  83 , the depression  84 A may be round, and may be shaped like, for example, a part of a sphere. Of the adhesion section  83 , the top on the substrate  84  side is fitted into the depression  84 A and is in contact with an inner surface of the depression  84 A. An entire round part of the top on the insulating layer  231  side may be preferably fitted into the depression  84 A. In this case, an area of a contact part between the upper electrode  85  and the adhesion section  83  is substantially equal to an area of the inner surface of the depression  84 A. 
     It is to be noted that the sensor device  80  may be, for example, configured as illustrated in each of  FIGS. 44B to 44I . The adhesion section  83  and the substrate  84  illustrated in  FIG. 44B  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 16A , respectively. The adhesion section  83  and the substrate  84  illustrated in  FIG. 44C  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 18A , respectively. The adhesion section  83  and the substrate  84  illustrated in  FIG. 44D  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 23 , respectively. The adhesion section  83  and the substrate  84  illustrated in  FIG. 44E  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 25 , respectively. The adhesion section  83  and the substrate  84  illustrated in  FIG. 44F  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 26A , respectively. The adhesion section  83  and the substrate  84  illustrated in  FIG. 44G  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 31 , respectively. The adhesion section  83  and the substrate  84  illustrated in  FIG. 44H  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 32A , respectively. The adhesion section  83  and the substrate  84  illustrated in  FIG. 44I  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 34 , respectively. 
     Next, effects of an apparatus including the sensor device  80  will be described. This apparatus is configured by providing the sensor device  80  in place of the sensor device  20 , in the display apparatus  1  according to the above-described first embodiment and modifications (Modifications 1 to 10), the input apparatus  2 , and the input apparatus  3  each including the sensor device  20 . In the present embodiment, the mitigation section is provided for the sensor device  80  in a manner similar to the above-described embodiments. Therefore, as compared with the above-described comparative example, it is possible to reduce the time from unloading to returning of each of the adhesion sections  25  and  26  (or the adhesion sections  25 ,  26 , and  29 ) to the original shape. Accordingly, it is possible to reduce a decline in the response speed. 
     6. Fourth Embodiment 
     Next,  FIG. 45  illustrates an example of a cross-sectional configuration of a passive device  90  according to a fourth embodiment. The passive device  90  may include, for example, a substrate  91 , a plurality of adhesion sections  92 , and a substrate  93 . The adhesion sections  92  may be two-dimensionally arranged on a surface of the substrate  91 . The substrate  93  may be disposed to face the substrate  91  with a predetermined gap therebetween. 
     For example, the substrates  91  and  93  may each be a glass substrate or a resin substrate. Each of the adhesion sections  92  is formed of an adhesive material having elasticity. Each of the adhesion sections  92  is in contact with the substrates  91  and  93 . Of each of the adhesion sections  92 , a top on the substrate  93  side is round, and may be shaped like, for example, a part of a sphere. For example, the shape of this top may be formed by a method similar to the method of forming the above-described adhesion section  25 . The substrate  93  is shaped like a sheet, and has a depression  93 A as a mitigation section, at a position facing each of the adhesion sections  92 . Here, the mitigation section refers to a section having a function of mitigating an increase in an area where each of the adhesion sections  92  is in contact with the substrate  93 . This area increases as the gap between the substrates  91  and  93  narrows. 
     The depression  93 A may be, for example, formed by transferring the shape of a mold to a resin film. As illustrated in  FIG. 46A , for example, as with the adhesion section  92 , the depression  93 A is round, and may be shaped like, for example, a part of a sphere. Of the adhesion section  92 , the top on the substrate  93  side is fitted into the depression  93 A and is in contact with an inner surface of the depression  93 A. An entire round part of the top on the substrate  93  side may be preferably fitted into the depression  93 A. In this case, an area of a contact part between the substrate  93  and the adhesion section  92  is substantially equal to an area of the inner surface of the depression  93 A. 
     It is to be noted that, for example, the passive device  90  may be configured as illustrated in each of  FIGS. 46B to 46I . The adhesion section  92  and the substrate  93  illustrated in  FIG. 46B  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 16A , respectively. The adhesion section  92  and the substrate  93  illustrated in  FIG. 46C  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 18A , respectively. The adhesion section  92  and the substrate  93  illustrated in  FIG. 46D  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 23 , respectively. The adhesion section  92  and the substrate  93  illustrated in  FIG. 46E  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 25 , respectively. The adhesion section  92  and the substrate  93  illustrated in  FIG. 46F  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 26A , respectively. The adhesion section  92  and the substrate  93  illustrated in  FIG. 46G  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 31 , respectively. The adhesion section  92  and the substrate  93  illustrated in  FIG. 46H  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 32A , respectively. The adhesion section  92  and the substrate  93  illustrated in  FIG. 46I  are configured as with the adhesion section  25  and the insulating layer  231  illustrated in  FIG. 34 , respectively. 
     Next, effects of the passive device  90  will be described. In the present embodiment, the mitigation section is provided for the passive device  90  in a manner similar to that in each of the above-described embodiments. Therefore, as compared with the above-described comparative example, it is possible to reduce the time from unloading to returning of each of the adhesion sections  25  and  26  (or the adhesion sections  25 ,  26 , and  29 ) to the original shape. Accordingly, it is possible to reduce a decline in the response speed. 
     The present application has been described above with reference to some embodiments and modifications, but is not limited thereto and may be variously modified. It is to be noted that the effects described in the present specification are mere examples. Effects of the present application are not limited to those described in the present specification. The present application may have effects other than the effects described in the present specification. 
     It is possible to achieve at least the following configurations from the above-described example embodiments of the disclosure. 
     (1) A sensor device including: 
     a first base material and a second base material disposed apart to face each other; 
     a plurality of first adhesion sections that are two-dimensionally arranged in a gap between the first base material and the second base material and have elasticity; and 
     a mitigation section configured to mitigate an increase in contact area of each of the first adhesion sections to one of the first base material and the second base material, the contact area increasing as the gap narrows. 
     (2) The sensor device according to (1), wherein 
     each of the first adhesion sections is in contact with the first base material and the second base material, 
     a top on a second base material side of each of the first adhesion sections is round, and 
     the second base material has a depression serving as the mitigation section, at positions facing the respective first adhesion sections. 
     (3) The sensor device according to (2), wherein an inner surface of the depression is round. 
     (4) The sensor device according to (2), wherein the depression is annular. 
     (5) The sensor device according to any one of (1) to (4), wherein each of the first adhesion sections is formed by printing on a surface of the first base material. 
     (6) The sensor device according to (1), wherein 
     each of the first adhesion sections is in contact with the first base material and the second base material, 
     the mitigation section is a plurality of convex annular bodies each provided on a surface of one of the first base material and the second base material, for each of the first adhesion sections, and 
     each of the first adhesion sections is in contact with the surface of the first base material or the second base material, through an opening of the convex annular body, as well as in contact with the convex annular body. 
     (7) The sensor device according to (6), wherein each of the first adhesion sections and each of the convex annular bodies are formed by printing on the surface of one of the first base material and the second base material. 
     (8) The sensor device according to (1), wherein 
     each of the first adhesion sections is in contact with the first base material and the second base material, 
     the mitigation section is a plurality of projections each provided at a position on a surface of one of the first base material and the second base material, without being in contact with each of the first adhesion sections, and 
     each of the projections is in contact with only one of the first base material and the second base material, when external force narrowing the projection is applied to neither the first base material nor the second base material. 
     (9) The sensor device according to (8), wherein each of the first adhesion sections and each of the projections are formed by printing on the surface of one of the first base material and the second base material. 
     (10) The sensor device according to (1), wherein 
     each of the first adhesion sections is in contact with the first base material, and 
     the mitigation section is a plurality of second adhesion sections disposed between the second base material and each of the first adhesion sections and having elasticity. 
     (11) The sensor device according to (10), wherein 
     each of the first adhesion sections is formed by printing on a surface of the first base material, and 
     each of the second adhesion sections is formed by printing on a surface of the second base material. 
     (12) The sensor device according to any one of (1) to (11), wherein 
     the first base material is a first conductive layer, or a layer including the first conductive layer, and 
     the second base material is a second conductive layer electrically separated from the first conductive layer, or a layer including the second conductive layer. 
     (13) The sensor device according to any one of (1) to (11), wherein 
     each of the first adhesion sections has conductivity, 
     the first base material has a plurality of first wirings electrically connected to the plurality of first adhesion sections, and 
     the second base material has a plurality of second wirings electrically connected to the plurality of first adhesion sections. 
     (14) The sensor device according to any one of (1) to (11), wherein 
     the first base material includes a plurality of magnetoresistive effect elements two-dimensionally arranged, and 
     the second base material includes a plurality of magnetic layers each disposed at a position facing each of the magnetoresistance effect elements. 
     (15) A display apparatus including: 
     a display panel having a display surface; and 
     a sensor device disposed on a side, opposite to the display surface, of the display panel, 
     wherein the sensor device includes 
     a first base material and a second base material disposed apart to face each other, 
     a plurality of first adhesion sections that are two-dimensionally arranged in a gap between the first base material and the second base material and have elasticity, and 
     a mitigation section configured to mitigate an increase in contact area of each of the first adhesion sections to one of the first base material and the second base material, the contact area increasing as the gap narrows. 
     (16) An input apparatus including: 
     a substrate having an operation surface; and 
     a sensor device disposed on a side, which is opposite to the operation surface, of the substrate, 
     wherein the sensor device includes 
     a first base material and a second base material disposed apart to face each other, 
     a plurality of first adhesion sections that are two-dimensionally arranged in a gap between the first base material and the second base material and have elasticity, and 
     a mitigation section configured to mitigate an increase in contact area of each of the first adhesion sections to one of the first base material and the second base material, the contact area increasing as the gap narrows. 
     (17) A method of manufacturing a sensor device, the method including: 
     increasing viscosity of each of a plurality of first adhesion sections, after printing, on a surface of a first base material, the first adhesion sections that are two-dimensionally arranged; 
     providing a mitigation section on a surface of the first base material or a second base material, the mitigation section being configured to mitigate an increase in contact area of each of the first adhesion sections to one of the first base material and the second base material, the contact area increasing as a gap between the first base material and the second base material narrows, when the first base material and the second base material are adhered to each other, with each of the first adhesion sections interposed therebetween; and 
     adhering the first base material and the second base material to each other, with each of the first adhesion sections interposed therebetween. 
     It should be understood that various changes and modifications to the presently preferred embodiments described herein will be apparent to those skilled in the art. Such changes and modifications can be made without departing from the spirit and scope of the present subject matter and without diminishing its intended advantages. It is therefore intended that such changes and modifications be covered by the appended claims.