Patent Publication Number: US-2017351360-A1

Title: Electrostatic capacitance input device and electro-optical device having input device

Description:
CROSS REFERENCES TO RELATED APPLICATIONS 
     The present application is a continuation of U.S. application Ser. No. 14/856,211, filed on Sep. 16, 2015, which application is a continuation of U.S. application Ser. No. 14/457,795, filed on Aug. 12, 2014, which application is a continuation of U.S. application Ser. No. 13/916,220, filed on Jun. 12, 2013, issued as U.S. Pat. No. 8,836,346 on Sep. 16, 2014, which application is a continuation of U.S. application Ser. No. 12/839,790, filed on Jul. 20, 2010, issued as U.S. Pat. No. 8,482,301 on Jul. 9, 2013, which claims priority to Japanese Priority Patent Application JP 2009-173984 filed in the Japan Patent Office on Jul. 27, 2009, the entire content of which is hereby incorporated by reference. 
    
    
     BACKGROUND 
     The present application relates to an electrostatic capacitance input device for detecting an input position based on the change in electrostatic capacitance connected to input position detection electrodes and an electro-optical device equipped with an input device having the electrostatic capacitance input device. 
     Some of electronic equipment such as mobile phones, car navigators, personal computers, ticket vendors and bank terminals incorporate an input device called a touch panel, for example, on the surface of a liquid crystal device so that one can enter information as one views an image displayed on an image display region of the liquid crystal device. An electrostatic capacitance input device is among such types of input devices and monitors the electrostatic capacitance connected to each of a plurality of input position detection electrodes. Therefore, when a finger approaches one of the plurality of input position detection electrodes, the electrostatic capacitance connected to the electrode in question increases by the amount of electrostatic capacitance formed between the electrode and finger, thus allowing for the electrode in question to be identified. 
     Such an electrostatic capacitance input device is susceptible to electromagnetic noise because it detects the changes in capacitance coupled to the input position detection electrodes. For this reason, it has been proposed to provide a shield electrode over the entire surface of the side opposite to the input operation side of the electrostatic capacitance input device (see JP-T-2003-511799, hereinafter referred to as Patent Document 1). 
     SUMMARY 
     However, the shield structure described in Patent Document 1 has a problem in that it cannot shut out electromagnetic noise trying to find its way into the electrostatic capacitance input device from the input operation side. 
     In light of the foregoing, it is desirable to provide an electrostatic capacitance input device and an electro-optical device equipped with an input device having the electrostatic capacitance input device that are more immune to electromagnetic noise trying to find its way into the electrostatic capacitance input device from the input operation side. 
     In order to solve the above problem, an electrostatic capacitance input device according to an embodiment of the present application is characterized in that it includes an input region, a plurality of wires and a shield electrode. A plurality of input position detection electrodes are provided in the input region of a substrate. The plurality of wires are electrically connected to the plurality of input position detection electrodes and extend outside the input region of the substrate. The shield electrode overlaps the wires on the input operation side. 
     The present application breaks away from the existing idea that a shield electrode cannot be provided on the input operation side of an electrostatic capacitance input device. Therefore, a shield electrode is provided on the input operation side for wires provided outside the input region. This shuts out electromagnetic noise trying to find its way into the wires from the input operation side, thus ensuring immunity to electromagnetic waves trying to find their way from the input operation side. Therefore, the electrostatic capacitance input device according to an embodiment of the present application is unlikely to malfunction due to electromagnetic noise. No shield electrode is provided in the input region on the input operation side, thus posing no hindrance to input position detection based on electrostatic capacitance. 
     In the present application, the shield electrode should preferably be provided all along the outer periphery of the substrate. This configuration more positively shuts out electromagnetic waves from the input operation side. 
     In the present application, a first conductive film, interlayer insulating film and second conductive film should preferably be formed in this order from the substrate side on the substrate. Of the first and second conductive films, at least either of the two conductive films should preferably be used to form the input position detection electrodes. Of the first and second conductive films, the conductive film on the side opposite to the input operation side should preferably be used to form the wires. Of the first and second conductive films, the conductive film on the input operation side should preferably be used to form the shield electrode. This configuration permits formation of the shield electrode with the conductive film formed on the substrate, thus eliminating the need to provide a shield electrode externally. 
     In an embodiment, of the first and second conductive films, the conductive film on the side opposite to the input operation side should preferably be used to form a shielding auxiliary electrode on the outer periphery side of the wires on the substrate. The shielding auxiliary electrode and shield electrode should preferably overlap and be electrically connected together in the region free from the interlayer insulating film. This configuration provides substantially reduced resistance of the shield electrode. Further, this configuration suppresses electromagnetic noise from finding its way into the wires from the surrounding environment. 
     In an embodiment, the shielding auxiliary electrode should preferably be formed along all the sides of the substrate, and the shielding auxiliary electrode and shield electrode should preferably overlap and be electrically connected together all along the longitudinal direction of the shielding auxiliary electrode. This configuration provides substantially reduced resistance of the shield electrode. Further, this configuration more positively suppresses electromagnetic noise from finding its way into the wires from the surrounding environment. 
     In an embodiment, of the first and second conductive films, at least either of the two conductive films should preferably be used to provide first and second mounting terminals outside the input region of the substrate. The first mounting terminals should preferably be connected to the wires, and the second mounting terminals to the shield electrode. This configuration permits external application of a potential to the shield electrode, for example, via a flexible wiring board connected to the substrate as with the first mounting terminals, thus allowing for easy application of a potential to the shield electrode. Further, this configuration permits connection of a common flexible wiring board to the first and second mounting terminals. 
     In an embodiment, of the first and second conductive films, at least either of the two conductive films should preferably be used to provide, on the substrate, a plurality of first input position detection electrodes and a plurality of second input position detection electrodes as the input position detection electrodes. The first input position detection electrodes extend in a first direction in an in-plane direction of the substrate. The second input position detection electrodes extend in a second direction that intersects the first direction in the in-plane direction of the substrate. A junction portion, interruption portion and relay electrode should preferably be provided at each of the intersecting portions between the first and second input position detection electrodes. The junction portion allows for one of the first and second input position detection electrodes to be continuous and includes the one of the first and second conductive films. The interruption portion is a portion where the other of the first and second input position detection electrodes is interrupted. The relay electrode overlaps the junction portion via the interlayer insulating film to electrically connect the interruption portion of the other of the first and second input position detection electrodes. The relay electrode includes the other of the first and second conductive films. 
     In an embodiment, the first conductive film, interlayer insulating film and second conductive film can be formed on a substrate surface on the input operation side of the substrate. The wires can be formed with the first conductive film, and the shield electrode with the second conductive film. 
     In an embodiment, the first conductive film, interlayer insulating film and second conductive film may be formed on the surface of the substrate on the side opposite to the input operation side. The wires may be formed with the second conductive film, and the shield electrode with the first conductive film. 
     In an embodiment, a signal having the same waveform and phase as a position detection signal applied to the input position detection electrodes should preferably be applied to the shield electrode. This configuration ensures freedom from parasitic capacitance between the shield electrode and input position detection electrodes. 
     The electrostatic capacitance input device to which the present application is applied is used to make up an electro-optical device equipped with an input device. In the electro-optical device equipped with an input device, an electro-optical panel adapted to generate an image is formed on the side opposite to the input operation side with respect to the substrate. 
     The electro-optical device equipped with an input device to which the present application is applied is used, for example, for mobile phones, car navigators, personal computers, ticket vendors and bank terminals. 
     Additional features and advantages are described herein, and will be apparent from the following Detailed Description and the figures. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
         FIGS. 1A to 1C  are explanatory diagrams of an electrostatic capacitance input device of an embodiment; 
         FIGS. 2A and 2B  are explanatory diagrams schematically illustrating the cross-sectional configuration of electro-optical device equipped with an input device of an embodiment; 
         FIGS. 3A to 3D  are explanatory diagrams schematically illustrating the two-dimensional configuration of the electrostatic capacitance input device according to embodiment 1; 
         FIG. 4  is an explanatory diagram illustrating, in an enlarged fashion, the two-dimensional configuration of electrodes and other components formed on a substrate of the electrostatic capacitance input device according to embodiment 1; 
         FIGS. 5A to 5C  are explanatory diagrams illustrating the cross-sectional configuration of the substrate of the electrostatic capacitance input device according to embodiment 1; 
         FIGS. 6A to 6C  are explanatory diagrams illustrating the configuration of wires formed on the substrate of the electrostatic capacitance input device according to embodiment 1; 
         FIGS. 7A to 7D  are explanatory diagrams schematically illustrating the two-dimensional configuration of an electrostatic capacitance input device according to embodiment 2; 
         FIG. 8  is an explanatory diagram illustrating, in an enlarged fashion, the two-dimensional configuration of the electrodes and other components formed on the substrate of the electrostatic capacitance input device according to embodiment 2; 
         FIGS. 9A to 9C  are explanatory diagrams schematically illustrating the cross-sectional configuration of the substrate of the electrostatic capacitance input device according to embodiment 2; 
         FIGS. 10A to 10D  are explanatory diagrams schematically illustrating the two-dimensional configuration of the electrostatic capacitance input device according to embodiment 3; 
         FIG. 11  is an explanatory diagram illustrating, in an enlarged fashion, the two-dimensional configuration of the electrodes and other components formed on the substrate of the electrostatic capacitance input device according to embodiment 3; 
         FIGS. 12A to 12C  are explanatory diagrams schematically illustrating the cross-sectional configuration of the substrate of the electrostatic capacitance input device according to embodiment 3; 
         FIGS. 13A to 13D  are explanatory diagrams schematically illustrating the two-dimensional configuration of the electrostatic capacitance input device according to embodiment 4; 
         FIG. 14  is an explanatory diagram illustrating, in an enlarged fashion, the two-dimensional configuration of the electrodes and other components formed on the substrate of the electrostatic capacitance input device according to embodiment 4; 
         FIGS. 15A to 15C  are explanatory diagrams illustrating the cross-sectional configuration of the electrostatic capacitance input device according to embodiment 4; 
         FIGS. 16A to 16D  are explanatory diagrams schematically illustrating the two-dimensional configuration of the electrostatic capacitance input device according to embodiment 5; 
         FIG. 17  is an explanatory diagram illustrating, in an enlarged fashion, the two-dimensional configuration of the electrodes and other components formed on the substrate of the electrostatic capacitance input device according to embodiment 5; 
         FIGS. 18A to 18C  are explanatory diagrams schematically illustrating the cross-sectional configuration of the substrate of the electrostatic capacitance input device according to embodiment 5; and 
         FIGS. 19A to 19C  are explanatory diagrams of electronic equipment having the electrostatic capacitance input device of an embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     The present application will be described below with reference to the accompanying drawings according to an embodiment. It should be noted that, in the figures referred to in the description given below, the layers and members are plotted on different scales so that they are shown in recognizable sizes. The basic configuration common to all the embodiments will be described first. Then, a detailed description will be made of each of the embodiments. 
     [Basic Configuration] 
     (Overall Configuration of the Electro-Optical Device Equipped with an Input Device) 
       FIGS. 1A to 1C  are explanatory diagrams of an electrostatic capacitance input device to which the present application is applied.  FIG. 1A  is an explanatory diagram schematically illustrating the overall configuration of an electro-optical device equipped with an input device having the electrostatic capacitance input device according to the present embodiment.  FIG. 1B  is an explanatory diagram schematically illustrating the electrical configuration of the electrostatic capacitance input device.  FIG. 1C  is an explanatory diagram of potentials supplied to the electrostatic capacitance input device.  FIGS. 2A and 2B  are explanatory diagrams schematically illustrating the cross-sectional configuration of an electro-optical device equipped with an input device to which the present application is applied.  FIG. 2A  is an explanatory diagram of a configuration example in which an embodiment of the input position detection electrodes are provided on a first surface that is on the input operation side of the substrate.  FIG. 2B  is an explanatory diagram of a configuration example in which the input position detection electrodes are provided on a second surface that is on the side opposite to the input operation side of the substrate. 
     In  FIG. 1A , an electro-optical device  100  equipped with an input device according to the present embodiment generally includes an image generating device  5  and electrostatic capacitance input device  1 . The image generating device  5  is made up, for example, of a liquid crystal device. The electrostatic capacitance input device  1  is stacked on the surface of the image generating device  5  on the display light emission side. The electrostatic capacitance input device  1  includes an input panel  2  (touch panel). The image generating device  5  includes a liquid crystal panel serving as an electro-optical panel  5   a  (display panel). In the present embodiment, both the input panel  2  and electro-optical panel  5   a  are rectangular in plan view. The region at the center of the electrostatic capacitance input device  1  and electro-optical device  100  equipped with an input device as seen in plan view is an input region  2   a . On the other hand, the region of the same devices  5  and  100  overlapping the input region  2   a  as seen in plan view is an image formation region. A flexible wiring board  35  is connected to the input panel  2  on the side of an edge portion  20   e . A flexible wiring board  73  is connected to the electro-optical panel  5   a  on the side of the edge portion  20   e.    
     As illustrated in  FIG. 1B , a control IC  10  adapted to detect the input operation on the input panel  2  is electrically connected to the electrostatic capacitance input device  1  via the flexible wiring board  35 . A potential which will be described later with reference to  FIG. 1C  is supplied from the IC  10  to the input panel  2 . 
     In  FIGS. 1A, 2A and 2B , the image generating device  5  is a transmissive or semi-transmissive active matrix liquid crystal display device. A backlight device (not shown) is provided on the side opposite to that (side opposite to the display light emission side) on which the input panel  2  is provided. The backlight device includes a light-transmitting light guide plate and light source. The light-transmitting light guide plate is provided on the side of the electro-optical panel  5   a  opposite to that on which the electrostatic capacitance input device  1  is provided. The light source includes an LED adapted to emit white light toward the side edge portions of the light guide plate. Light emitted from the light source enters the light guide plate from its side edge portions, being emitted toward the electro-optical panel  5   a  while propagating through the light guide plate. An optical member in a sheet form such as a light-scattering sheet or prism sheet may be arranged between the light guide plate and electro-optical panel  5   a.    
     In the image generating device  5 , a first polarizer  81  is stacked on the display light emission side of the electro-optical panel  5   a , and a second polarizer  82  on the side of the electro-optical panel  5   a  opposite to the display light emission side. Therefore, the electrostatic capacitance input device  1  is glued to the first polarizer  81  with a light-transmitting adhesive (not shown) such as acrylic resin-based adhesive. The electro-optical panel  5   a  includes a light-transmitting element substrate  50  and light-transmitting opposed substrate  60 . The light-transmitting element substrate  50  is provided on the display light emission side. The opposed substrate  60  is provided to be opposed to the element substrate  50 . The element substrate  50  and opposed substrate  60  are bonded together with a sealing material  71  in the form of a rectangular frame. A liquid crystal layer  55  is held in the region surrounded by the sealing material  71  between the opposed substrate  60  and element substrate  50 . A plurality of pixel electrodes  58  are formed on the surface of the element substrate  50  opposed to the opposed substrate  60 . The pixel electrodes  58  are formed with a light-transmitting conductive film such as ITO (Indium Tin Oxide) film. A common electrode  68  is formed on the surface of the opposed substrate  60  opposed to the element substrate  50 . The common electrode  68  is formed with a light-transmitting conductive film such as ITO (Indium Tin Oxide) film. It should be noted that if the image generating device  5  is an IPS (In Plane Switching) or FFS (Fringe Field Switching) device, the common electrode  68  is provided on the element substrate  50 . On the other hand, the element substrate  50  may be provided on the display light emission side. In the element substrate  50 , a drive IC  75  is COG-mounted in an overhanging section  59  hanging over the edge of the opposed substrate  60 . Further, a flexible wiring board  73  is connected to the overhanging section  59 . It should be noted that drive circuits may be formed on the element substrate  50  concurrently with switching elements on the same substrate  50 . 
     In the electro-optical device  100  equipped with an input device configured as described above, a light-transmitting conductive layer  99  (not shown in  FIGS. 1A to 1C , refer to  FIGS. 2A and 2B ) made, for example, of an ITO film is provided between the electro-optical panel  5   a  and input panel  2 . The conductive layer  99  prevents electromagnetic noise emitted from the electro-optical panel  5   a  from entering the input panel  2 . 
     (Detailed Configuration of the Input Device  1 ) 
     In the electrostatic capacitance input device  1  illustrated in  FIGS. 2A and 2B , the input panel  2  includes a light-transmitting substrate  20  made, for example, of a glass or plastic plate. In the present embodiment, a glass substrate is used as the substrate  20 . It should be noted that when the substrate  20  includes a plastic material, a heat-resistant and light-transmitting sheet made of PET (polyethylene terephthalate), PC (polycarbonate), PES (polyethersulphone), PI (polyimide) or cyclic olefin resin such as polynorbornene can be used as the plastic material. A description will be given below assuming that the surface of the substrate  20  on the input operation side is a first surface  20   a  and that the surface thereof on the side opposite to the input operation side is a second surface  20   b.    
     In the configuration example of the electrostatic capacitance input device  1  shown in  FIG. 2A  of the two examples illustrated in  FIGS. 2A and 2B , a first conductive film  4   a , interlayer insulating film  214  and second conductive film  4   b  are formed, from bottom to top as seen from the substrate  20 , on the first surface  20   a  of the substrate  20 . Input position detection electrodes  21  are formed with at least one of the first and second conductive films  4   a  and  4   b . The flexible wiring board  35  is connected to the first surface  20   a  on the edge portion  20   e  of the substrate  20 . A light-transmitting and insulating cover  90  is glued to the first surface  20   a  of the substrate  20 , for example, with an adhesive  90   e . An insulating light-shielding layer  90   a  is printed in the region of the cover  90  overlapping an outer region  2   b  on the first surface  20   a  of the substrate  20 . The input region  2   a  is surrounded by the light-shielding layer  90   a . The light-shielding layer  90   a  overlaps the outer region of the electro-optical panel  5   a , shutting out light leaking from the light source and the edge portions of the light guide of the image generating section  5 . 
     On the other hand, the light-transmitting conductive layer  99  is formed roughly over the entire second surface  20   b  of the substrate  20  to prevent electromagnetic noise emitted from the electro-optical panel  5   a  from entering the input panel  2 . Wires  35   a  of the flexible wiring board  35  are connected to the conductive layer  99 , thus allowing a shield potential, which will be described later, to be applied to the conductive layer  99  via the flexible wiring board  35 . 
     In the configuration example shown in  FIG. 2B , the first conductive film  4   a , interlayer insulating film  214  and second conductive film  4   b  are formed, from bottom to top as seen from the substrate  20 , on the second surface  20   a  of the substrate  20 , as described in detail later. Of the first and second conductive films  4   a  and  4   b , at least one of the two films is used to form the input position detection electrodes  21 . In this configuration, the flexible wiring board  35  is connected to the second surface  20   b  on the edge portion  20   e  of the substrate  20 . In the present embodiment, the light-transmitting and insulating cover  90  is also glued to the first surface  20   a  of the substrate  20 , for example, with the adhesive  90   e . The insulating light-shielding layer  90   a  is printed in the region of the cover  90  overlapping the outer region  2   b  on the first surface  20   a  of the substrate  20 . 
     On the other hand, the light-transmitting conductive layer  99  is formed roughly over the entire surface of the element substrate  50  on the side of the input panel  2  to prevent electromagnetic noise emitted from the electro-optical panel  5   a  from entering the input panel  2 . The wires  35   a  of the flexible wiring board  35  are connected to the conductive layer  99 , thus allowing the shield potential, which will be described later, to be applied to the conductive layer  99  via the flexible wiring board  35   
     A description will be given below of examples, as embodiments 1, 2 and 3, in which the present application is applied to the embodiments of forming the first conductive film  4   a , interlayer insulating film  214  and second conductive film  4   b  on the first surface  20   a  of the substrate  20  (embodiment shown in  FIG. 2A ). On the other hand, a description will be given below of examples, as embodiments 4 and 5, in which the present application is applied to the embodiments of forming the first conductive film  4   a , interlayer insulating film  214  and second conductive film  4   b  on the second surface  20   b  of the substrate  20  (embodiment shown in  FIG. 2B ). 
     Embodiment 1 
     A description will be given below of the type of the electrostatic capacitance input device  1 , described with reference to  FIG. 2A , with reference to  FIGS. 3A to 6C .  FIGS. 3A to 3D  are explanatory diagrams schematically illustrating the two-dimensional configuration of the electrostatic capacitance input device  1  according to embodiment 1 of the present application.  FIG. 3A  is an explanatory diagram illustrating the two-dimensional positional relationship between the electrodes and other components formed on the substrate  20  of the electrostatic capacitance input device  1 .  FIG. 3B  is an explanatory diagram illustrating the two-dimensional configuration of the first conductive film  4   a  formed on the substrate  20 .  FIG. 3C  is an explanatory diagram illustrating the two-dimensional configuration of the interlayer insulating film  214  formed on the substrate  20 .  FIG. 3D  is an explanatory diagram illustrating the two-dimensional configuration of the second conductive film  4   b  formed on the substrate  20 .  FIG. 3A  illustrates the elements shown in  FIGS. 3B, 3C and 3D  in an overlapping fashion. 
       FIG. 4  is an explanatory diagram illustrating, in an enlarged fashion, the two-dimensional configuration of the electrodes and other components formed on the substrate  20  of the electrostatic capacitance input device  1  according to embodiment 1 of the present application.  FIGS. 5A to 5C  are explanatory diagrams illustrating the cross-sectional configuration of the substrate  20  of the electrostatic capacitance input device  1  according to embodiment 1 of the present application.  FIGS. 5A, 5B and 5C  are cross-sectional views of the substrate  20  taken along lines A 1 -A 1 ′, B 1 -B 1 ′ and C 1 -C 1 ′ respectively shown in  FIG. 4 .  FIGS. 6A to 6C  are explanatory diagrams illustrating the configuration of wires formed on the substrate  20  of the electrostatic capacitance input device  1  according to embodiment 1 of the present application.  FIGS. 6A, 6B and 6C  are a plan view of the wires and cross-sectional views thereof taken along lines E-E′ and F-F′, respectively. 
     It should be noted that the first conductive film  4   a  is shaded with oblique lines sloping upward to the right, and the second conductive film  4   b  with oblique lines sloping downward to the right in  FIGS. 3A, 3B, 3D and 4 . In  FIG. 3C , the interlayer insulating film  214  is shaded with a plurality of dots. In  FIGS. 3B, 3C, 3D and 4 , the corners of the input region  2   a  are shown with markings in the form of letter L. It should be noted that the same is true for the drawings which will be referred to in embodiments 2 to 5 which will be described later. 
     As illustrated in  FIGS. 3A to 5C , the first conductive film  4   a , interlayer insulating film  214  and second conductive film  4   b  are formed in this order, from bottom to top as seen from the substrate  20 , on the second surface  20   a  of the substrate  20 . In the present embodiment, the first and second conductive films  4   a  and  4   b  are made of a light-transmitting conductive film of 10 to 40 nm in thickness such as ITO or IZO (Indium Zinc Oxide) film. The interlayer insulating film  214  is made of a light-transmitting insulating film of 40 to 60 nm in thickness such as silicon oxide film. In the present embodiment, a light-transmitting underlying protective film  217  made, for example, of a silicon oxide film is formed over the entire first surface  20   a  of the substrate  20 . The first conductive film  4   a , interlayer insulating film  214  and second conductive film  4   b  are formed in this order on the light-transmitting underlying protective film  217 . As described with reference to  FIG. 2A , on the other hand, the light-transmitting conductive layer  99  is formed roughly over the entire second surface  20   b  of the substrate  20  to prevent electromagnetic noise emitted from the electro-optical panel  5   a  from entering the input panel  2  (refer to  FIGS. 5A to 5C ). 
     As illustrated in  FIG. 3B , the first conductive film  4   a  is formed as a plurality of rectangular regions in the input region  2   a  first. These rectangular regions make up the input position detection electrodes  21  (pad portions  211   a  and  212   a  (large area portions) of first and second input position detection electrodes  211  and  212 ). The pad portions  211   a  and  212   a  are arranged alternately in the X and Y directions. In the plurality of pad portions  211   a , the same portions  211   a  diagonally adjacent to each other are partially connected together by a junction portion  211   c . In the plurality of pad portions  212   a , the same portions  212   a  diagonally adjacent to each other are also partially connected together by the junction portion  211   c . Further, the first conductive film  4   a  is formed in the outer region  2   b  of the input region  2   a  as wires  27  extending from the input position detection electrodes  21 . The first conductive film  4   a  is also formed in a region near the edge portion  20   e  overlapping first and second mounting terminals  24   a  and  24   b.    
     As illustrated in  FIG. 3C , the interlayer insulating film  214  is formed over the entire input region  2   a . Further, the same film  214  is formed over a large region excluding the outer periphery of the substrate  20 . Still further, contact holes  214   a  are formed in the interlayer insulating film  214 , with each set containing the four contact holes  214   a . Here, the gap between the outer periphery of the interlayer insulating film  214  and the edge portion  20   e  of the substrate  20  is wider than that between the outer periphery of the interlayer insulating film  214  and other edge portions  20   f ,  20   g  and  21   h , thus securing a space for forming the first and second mounting terminals  24   a  and  24   b.    
     As illustrated in  FIG. 3D , the second conductive film  4   b  is formed as relay electrodes  215  in the regions of the input region  2   a  overlapping the contact holes  214   a  shown in  FIG. 3C . Further, the same film  4   b  is formed in the outer region  2   b  of the input region  2   a  as a shield electrode  28  in the form of a rectangular frame entirely surrounding the input region  2   a . Still further, the same film  4   b  is formed in a region near the edge portion  20   e  overlapping the first and second mounting terminals  24   a  and  24   b.    
     When the first conductive film  4   a , interlayer insulating film  214  and second conductive film  4   b , that are configured as described above, are stacked one on top of another, the substrate  20  is configured as illustrated in  FIGS. 3A, 4 and 5A to 5C . When seen in plan view, the substrate  20  has the plurality of input position detection electrodes  21  formed in the input region  2   a . In the present embodiment, the input position detection electrodes  21  include the plurality of columns of first and second input position detection electrodes  211  and  212 . The first input position detection electrodes  211  (shown by thick solid lines in  FIG. 3A ) extend in a first direction (direction shown by arrow Y). The second input position detection electrodes  212  (shown by thick dashed lines in  FIG. 3A ) extend in a second direction (direction shown by arrow X). 
     Of the first and second conductive films  4   a  and  4   b , the first conductive film  4   a  is used to form the input position detection electrodes  21  (first and second input position detection electrodes  211  and  212 ). As a result, the input position detection electrodes  21  are made up of the same layer. On the first surface  20   a  of the substrate  20 , therefore, a plurality of intersecting portions  218  exist between the first and second input position detection electrodes  211  and  212 . In the present embodiment, of the first and second input position detection electrodes  211  and  212 , the first input position detection electrodes  211  are connected together in the Y direction by the junction portions  211   c  made of the first conductive film  4   a  at the intersecting portions  218 , thus extending in the Y direction. In contrast, interruption portions  218   a  are formed at the intersecting portions  218  for the second input position detection electrodes  212 . Further, the interlayer insulating film  214 , made, for example, of a silicon oxide film, is formed in the overlying layer of the first and second input position detection electrodes  211  and  212 . The light-transmitting relay electrodes  215  are formed with the second conductive film  4   b  in the overlying layer of the interlayer insulating film  214 . The same electrodes  215  electrically connect the second input position detection electrodes  212  which is interrupted at the intersecting portions  218  together via the four contact holes  214   a  of the interlayer insulating film  214 . As a result, the second input position detection electrodes  212  are electrically connected together in the X direction. It should be noted that the relay electrodes  215  are never likely to be shorted out because the same electrodes  215  overlap the junction portions  211   c  via the interlayer insulating film  214 . 
     Each of the first and second input position detection electrodes  211  and  212  configured as described above includes the rectangular pad portion  211   a  or  212   a  having a large area in a region sandwiched between the intersecting portions  218 . In the first input position detection electrodes  211 , the junction portions  211   c  located at the intersecting portions  218  are narrower than the pad portions  211   a  and  212   a . Further, the relay electrodes  215  are also formed narrower than the pad portions  211   a  and  212   a.    
     (Configuration of the Wires  27  and Shield Electrode  28 ) 
     In the electrostatic capacitance input device  1  according to the present embodiment, the plurality of wires  27  are formed in the outer region  2   b  of the input region  2   a  on the first surface  20   a  of the substrate  20 . Each of the same wires  27  extends from one of the first and second input position detection electrodes  211  and  212  to the edge portion  20   e  of the substrate  20 . More specifically, the wires  27  connected to the first input position detection electrodes  211  are routed between the input region  2   a  and the edge portion  20   e  of the substrate  20 . On the other hand, the wires  27  connected to the second input position detection electrodes  212  extend linearly between the input region  2   a  and the edge portion  20   f  or  20   h  of the substrate  20  first and then are routed between the input region  2   a  and the edge portion  20   e  of the substrate  20 . In the wires  27  configured as described above, the portions near the edge portion  20   e  of the substrate  20  include the first mounting terminals  24   a . The flexible wiring board  35  described with reference to  FIGS. 1A to 1C and 2  is connected to the first mounting terminals  24   a.    
     On the other hand, the shield electrode  28  is formed in a region overlapping the wires  27  in the outer region  2   b  of the input region  2   a  on the first surface  20   a  of the substrate  20 . In the present embodiment, of the first and second conductive films  4   a  and  4   b , the second conductive film  4   b  on the input operation side is used to form the shield electrode  28 . The interlayer insulating film  214  is provided between the wires  27  and shield electrode  28 . 
     In the present embodiment, the wires  27  are formed in the regions corresponding to three sides, i.e., one region sandwiched between the input region  2   a  and the edge portion  20   e  of the substrate  20 , another between the input region  2   a  and the edge portion  20   f  of the substrate  20 , and still another between the input region  2   a  and the edge portion  20   h  of the substrate  20 . In contrast, the shield electrode  28  is formed in the form of a rectangular frame connected in the circumferential direction in the regions corresponding to four sides, i.e., one region sandwiched between the input region  2   a  and the edge portion  20   e  of the substrate  20 , another between the input region  2   a  and the edge portion  20   f  of the substrate  20 , still another between the input region  2   a  and the edge portion  20   g  of the substrate  20 , and still another between the input region  2   a  and the edge portion  20   h  of the substrate  20 . Further, the shield electrode  28  is wider than each of the wires  27 . Therefore, the shield electrode  28  is formed in a large region including that in which the wires  27  extend on the input operation side. Still further, the shield electrode  28  hangs over the outer periphery of the interlayer insulating film  214 . As a result, the shield electrode  28  covers a side portion  214   e  of the interlayer insulating film  214 . 
     In the outer region  2   b  on the first surface  20   a  of the substrate  20 , on the other hand, the two second mounting terminals  24   b  are formed in such a manner as to sandwich, on both sides, the first mounting terminals  24   a  arranged in columns. The first mounting terminals  24   a  are electrically connected to the wires  27 , and the second mounting terminals  24   b  to the shield electrode  28  on both sides of the region where the first mounting terminals  24   a  are arranged. 
     (Manufacturing Method of the Substrate  20 ) 
     The manufacturing method of the substrate  20  configured as described above will be briefly described while at the same time describing, for example, the configuration of the first and second mounting terminals  24   a  and  24   b . In order to form the substrate  20 , a light-transmitting conductive film is formed first that makes up the first conductive film  4   a . Then, the light-transmitting conductive film is patterned by etching as illustrated in  FIG. 3B , thus forming the input position detection electrodes  21  (first and second input position detection electrodes  211  and  212 ) and wires  27 . 
     Next, the interlayer insulating film  214  is formed. Then, the same film  214  is patterned by etching as illustrated in  FIG. 3C , thus forming the contact holes  214   a . At the same time, the interlayer insulating film  214  is removed from the edge portions of the substrate  20   
     Next, the light-transmitting conductive film making up the second conductive film  4   b  is formed. Then, the same film is patterned by etching as illustrated in  FIG. 3D , thus forming the relay electrodes  215  and shield electrode  28 . At this time, the shield electrode  28  is formed in such a manner that it hangs over the outer periphery of the interlayer insulating film  214 . As a result, the shield electrode  28  covers the side portion  214   e  of the interlayer insulating film  214 . It should be noted that, in the present embodiment, a light-transmitting top coat layer  219  is formed on top of the second conductive film  4   b . The top coat layer  219  is made, for example, of a resin composition or silicon oxide and formed by applying and hardening a liquid composition. 
     In the present embodiment, the first and second mounting terminals  24   a  and  24   b  are formed at the same time in the above step. That is, when the input position detection electrodes  21  and wires  27  are formed with the first conductive film  4   a , the same film  4   a  is left in a region overlapping the first or second mounting terminal  24   a  or  24   b  as illustrated in  FIGS. 5B and 5C . It should be noted, however, that, in this condition, the first conductive film  4   a  left in the region overlapping the first or second mounting terminal  24   a  or  24   b  will be removed by etching when the relay electrodes  215  and shield electrode  28  are formed with the second conductive film  4   b . In the present embodiment, therefore, the second conductive film  4   b  is left in a region overlapping the first or second mounting terminal  24   a  or  24   b  when the relay electrodes  215  and shield electrode  28  are formed with the second conductive film  4   b . This ensures that the first conductive film  4   a  formed in the region overlapping the first or second mounting terminal  24   a  or  24   b  is left unremoved by etching. 
     It should be noted that when the relay electrodes  215  and shield electrode  28  are formed with the second conductive film  4   b , the second conductive film  4   b  left with the second mounting terminal  24   b  is connected to the shield electrode  28 . In contrast, an interruption portion is provided between the same film  4   b  left with the first mounting terminal  24   a  and the shield electrode  28 . It should be noted, however, that the edge portion of the second conductive film  4   b  left with the first mounting terminal  24   a  overlaps the interlayer insulating film  214 . Therefore, the second conductive film  4   b  formed in the region overlapping the first mounting terminal  24   a  completely overlaps the first conductive film  4   a  formed in the region overlapping the first mounting terminal  24   a . This positively ensures that the first conductive film  4   a  is left unremoved in the region overlapping the first mounting terminal  24   a.    
     Further, when the wires  27  are formed in the present embodiment, the first conductive film  4   a  should preferably extend along the region where the wires  27  are formed, and a metal layer  4   c  made, for example, of chromium, silver, aluminum or silver-aluminum alloy should preferably be provided on top of the first conductive film  4   a  so as to extend along the region where the wires  27  are formed, as illustrated in  FIGS. 6A to 6C . This multi-layer structure contributes to reduced resistance of the wires  27 . 
     (Input Position Detection Operation) 
     In the electrostatic capacitance input device  1  according to the present embodiment, the IC  10  is connected to the first and second mounting terminals  24   a  and  24   b  of the input panel  2  via the flexible wiring board  35  as illustrated in  FIG. 1B . Here, the IC  10  includes terminals  11   a  and a terminal  11   b . The terminals  11   a  sequentially output a position detection signal VD to the first mounting terminals  24   a  via the flexible wiring board  35 . The terminal  11   b  outputs a shield potential VS to the second mounting terminal  24   b  via the flexible wiring board  35 . It should be noted that the IC  10  also includes a ground terminal adapted to output a ground potential to the input panel  2 . However, this terminal is not directly related to the present application. Therefore, the description and illustration thereof are omitted. 
     In the electrostatic capacitance input device  1  configured as described above, the IC  10  outputs the position detection signal VD, for example, in the form of a rectangular pulse illustrated in  FIG. 1C . As a result, when the input position detection electrode  21  has no parasitic capacitance, a signal having a waveform shown by a solid line in  FIG. 1C  is output from the terminals  11   a . In contrast, if the input position detection electrode  21  has a parasitic capacitance, the waveform is distorted due to the capacitance as illustrated by a dashed line in  FIG. 1C . This makes it possible to determine whether the input position detection electrodes  21  have any parasitic capacitance. In the present embodiment, therefore, the position detection signal VD is sequentially output to each of the plurality of input position detection electrodes  21  to monitor the electrostatic capacitance coupled thereto. As a result, when a finger approaches one of the plurality of input position detection electrodes  21 , the electrostatic capacitance of the same electrode  21  approached by the finger increases by the amount formed between the electrode and finger, thus allowing for the electrode in question to be identified. 
     (Function and Effect of the Present Embodiment) 
     The electrostatic capacitance input device  1  according to the present embodiment is susceptible to electromagnetic noise because it detects the changes in capacitance coupled to the input position detection electrodes  21 . In the present embodiment, therefore, a shield layer  35   b  is formed for the wires  35   a  that are formed on the flexible wiring board  35 . The shield potential VS is applied to the shield layer  35   b  via a shielding wire  35   c . In the present embodiment, the potential applied to the shield layer  35   b  as the shield potential VS has the same waveform (and phase) as the position detection signal VD supplied to the input position detection electrodes  21 . This ensures freedom from parasitic capacitance between the wires  35   a  and shield layer  35   b.    
     Further, in the present embodiment, the shield potential VS having the same waveform (and phase) as the position detection signal VD is applied to the shield electrode  28  from the IC  10  via a shielding wire  35   d  of the flexible wiring board  35  and the second mounting terminals  24   b . Here, the shield electrode  28  overlaps, on the input operation side, the plurality of wires  27  extending in the outer region  2   b  of the input region  2   a  of the substrate  20 . The shield electrode  28  shuts out electromagnetic noise trying to find its way into the wires  27  from the input operation side, thus making the input panel  2  immune to electromagnetic waves trying to find their way from the input operation side. Therefore, the electrostatic capacitance input device  1  according to the present embodiment is unlikely to malfunction due to electromagnetic noise. Further, the shield electrode  28  is not provided in the input region  2   a  on the input operation side, thus posing no hindrance to input position detection based on electrostatic capacitance. 
     Further, the shield potential VS has the same waveform (and phase) as the position detection signal VD supplied to the input position detection electrodes  21 . This ensures freedom from parasitic capacitance between the wires  27  and shield electrode  28 . As a result, even if the shield electrode  28  is provided, input position detection based on electrostatic capacitance will not be hindered. 
     Further, of the first and second conductive films  4   a  and  4   b  used to form the first and second input position detection electrodes  211  and  212  and relay electrodes  215 , the first conductive film  4   a  on the side opposite to the input operation side is used to form the wires  27 . In contrast, of the first and second conductive films  4   a  and  4   b , the second conductive film  4   b  on the input operation side is used to form the shield electrode  28 . This provides advantages including no need to provide a shield electrode externally. 
     Further, the shield electrode  28  is provided all along the outer periphery of the substrate  20 , thus shutting out electromagnetic noise trying to find its way from the input operation side more positively. Still further, the shield electrode  28  covers the side portion  214   e  of the interlayer insulating film  214  near the outer periphery of the substrate  20 . This shuts out electromagnetic noise trying to find its way into the wires  27  from the surrounding environment. 
     Further, the first and second mounting terminals  24   a  and  24   b  are provided in the outer region  2   b  of the substrate  20  using both the first and second conductive films  4   a  and  4   b . This allows for a potential to be applied externally to the shield electrode  28  via the flexible wiring board  35  connected to the substrate  20 , thus making it possible to apply the shield potential VS to the shield electrode  28  with ease. Further, the common flexible wiring board  35  can be connected to the first and second mounting terminals  24   a  and  24   b . Moreover, the second mounting terminals  24   b  are electrically connected to the shield electrode  28 , one on each side of the region where the first mounting terminals  24   a  are arranged, thus shutting out electromagnetic noise trying to find its way into the wires  27  from the surrounding environment. 
     Embodiment 2 
     A description will be given of an example based on embodiment 1 in which a shielding auxiliary electrode  29  is added to the substrate  20  with reference to  FIGS. 7A to 9C .  FIGS. 7A to 7D  are explanatory diagrams schematically illustrating the two-dimensional configuration of the electrostatic capacitance input device  1  according to embodiment 2 of the present application.  FIG. 7A  is an explanatory diagram illustrating the two-dimensional positional relationship between the electrodes and other components formed on the substrate  20  of the electrostatic capacitance input device  1 .  FIG. 7B  is an explanatory diagram illustrating the two-dimensional configuration of the first conductive film  4   a  formed on the substrate  20 .  FIG. 7C  is an explanatory diagram illustrating the two-dimensional configuration of the interlayer insulating film  214  formed on the substrate  20 .  FIG. 7D  is an explanatory diagram illustrating the two-dimensional configuration of the second conductive film  4   b  formed on the substrate  20 .  FIG. 7A  illustrates the elements shown in  FIGS. 7B, 7C and 7D  in an overlapping fashion. 
       FIG. 8  is an explanatory diagram illustrating, in an enlarged fashion, the two-dimensional configuration of the electrodes and other components formed on the substrate  20  of the electrostatic capacitance input device  1  according to embodiment 2 of the present application.  FIGS. 9A to 9C  are explanatory diagrams illustrating the cross-sectional configuration of the substrate  20  of the electrostatic capacitance input device  1  according to embodiment 2 of the present application.  FIGS. 9A, 9B and 9C  are cross-sectional views of the substrate  20  taken along lines A 2 -A 2 ′, B 2 -B 2 ′ and C 2 -C 2 ′ respectively shown in  FIG. 8 . It should be noted that the present embodiment is identical in basic configuration to embodiment 1. Therefore, like components are denoted by the same reference numerals, and the description thereof is omitted. 
     In the electrostatic capacitance input device  1  according to the present embodiment, the first conductive film  4   a , interlayer insulating film  214  and second conductive film  4   b  are also formed, from bottom to top as seen from the substrate  20 , on the first surface  20   a  of the substrate  20  as in embodiment 1, as illustrated in  FIGS. 7A to 9C . 
     As illustrated in  FIG. 7B , the first conductive film  4   a  is formed as the pad portions  211   a  and  212   a  of the first and second input position detection electrodes  211  and  212  and the wires  27  as in embodiment 1. The first conductive film  4   a  is also formed in a region near the edge portion  20   e  overlapping the first and second mounting terminals  24   a  and  24   b.    
     Unlike embodiment 1, the first conductive film  4   a  is formed as the shielding auxiliary electrode  29  outside the wires  27  in the outer region  2   b  of the substrate  20  in the present embodiment. Here, the wires  27  are formed in the regions corresponding to the three sides of the substrate  20 , i.e., one region between the input region  2   a  and the edge portion  20   e  of the substrate  20 , another between the input region  2   a  and the edge portion  20   f  of the substrate  20 , and still another between the input region  2   a  and the edge portion  20   h  of the substrate  20 . In contrast, the shielding auxiliary electrode  29  is formed along all the sides of the substrate  20 , i.e., one region sandwiched between the input region  2   a  and the edge portion  20   e  of the substrate  20 , another between the input region  2   a  and the edge portion  20   f  of the substrate  20 , still another between the input region  2   a  and the edge portion  20   g  of the substrate  20 , and still another between the input region  2   a  and the edge portion  20   h  of the substrate  20 . It should be noted that the shielding auxiliary electrode  29  bends midway toward the second mounting terminal  29  in the region sandwiched between the input region  2   a  and the edge portion  20   e  of the substrate  20 . The same electrode  29  is interrupted in the region where the wires  27  extend. 
     As illustrated in  FIG. 7C , the interlayer insulating film  214  is formed over a large region excluding the outer periphery of the substrate  20  as in embodiment 1. The contact holes  214   a  are formed in the interlayer insulating film  214 , with each set containing the four contact holes  214   a . Here, the interlayer insulating film  214  is formed slightly more inward than the outer periphery of the substrate  20 . As a result, the interlayer insulating film  214  is not formed near the outer periphery of the substrate  20 . 
     As illustrated in  FIG. 7D , the second conductive film  4   b  is formed as the relay electrodes  215  in the regions of the input region  2   a  overlapping the contact holes  214   a  shown in  FIG. 7C . Further, the same film  4   b  is formed in the outer region  2   b  of the input region  2   a  as the shield electrode  28 . Still further, the same film  4   b  is formed in a region near the edge portion  20   e  overlapping the first and second mounting terminals  24   a  and  24   b . A potential having the same waveform (and phase) as the position detection signal supplied to the input position detection electrodes  21  is applied to the shield electrode  28 . 
     Further, the two second mounting terminals  24   b  are formed in the outer region  2   b  on the first surface  20   a  of the substrate  20 , one on each side of the region where the first mounting terminals  24   a  are arranged. The first mounting terminals  24   a  are electrically connected to the wires  27 , and the second mounting terminals  24   b  to the shield electrode  28  on both sides of the region where the first mounting terminals  24   a  are arranged. The present embodiment is similar in other configurations to embodiment 1. Therefore, the description thereof is omitted. 
     In the input panel  2  configured as described above, of the first and second conductive films  4   a  and  4   b , the first conductive film  4   a  on the side opposite to the input operation side is used to form the wires  27  as in embodiment 1. Of the first and second conductive films  4   a  and  4   b , the second conductive film  4   b  on the input operation side is used to form the shield electrode  28 . The same electrode  28  overlaps the wires  27  on the input operation side. This provides the same advantages as in embodiment 1 including shutting out electromagnetic noise trying to find its way into the wires  27  from the input operation side thanks to the shield electrode  28 . 
     The shielding auxiliary electrode  29  is formed to the outside of the outer periphery of the interlayer insulating film  214  at the positions corresponding to the four sides of the substrate  20 . Part of the same electrode  29  is exposed from the interlayer insulating film  214 . On the other hand, the shield electrode  28  is formed to the outside of the outer periphery of the interlayer insulating film  214  at the positions corresponding to the four sides of the substrate  20 . Therefore, the shield electrode  28  covers the side portion  214   e  on the outer periphery side of the interlayer insulating film  214 . The same electrode  28  is connected to the shielding auxiliary electrode  29  exposed from the interlayer insulating film  214  all along the longitudinal direction (extension direction) of the same electrode  29  on the outer periphery side of the interlayer insulating film  214  (in the region free from the interlayer insulating film  214 ). This provides substantially reduced resistance of the shield electrode  28 . Further, the shield electrode  28  and shielding auxiliary electrode  29  suppress electromagnetic noise from finding its way into the wires  27  from the surrounding environment. 
     Embodiment 3 
     A description will be given of an example in which the input position detection electrodes are formed with the second conductive film  4   b  in the type of the electrostatic capacitance input device  1  described with reference to  FIG. 2A .  FIGS. 10A to 10D  are explanatory diagrams schematically illustrating the two-dimensional configuration of the electrostatic capacitance input device  1  according to embodiment 3 of the present application.  FIG. 10A  is an explanatory diagram illustrating the two-dimensional positional relationship between the electrodes and other components formed on the substrate  20  of the electrostatic capacitance input device  1 .  FIG. 10B  is an explanatory diagram illustrating the two-dimensional configuration of the first conductive film  4   a  formed on the substrate  20 .  FIG. 10C  is an explanatory diagram illustrating the two-dimensional configuration of the interlayer insulating film  214  formed on the substrate  20 .  FIG. 10D  is an explanatory diagram illustrating the two-dimensional configuration of the second conductive film  4   b  formed on the substrate  20 .  FIG. 10A  illustrates the elements shown in  FIGS. 10B, 10C and 10D  in an overlapping fashion. 
       FIG. 11  is an explanatory diagram illustrating, in an enlarged fashion, the two-dimensional configuration of the electrodes and other components formed on the substrate  20  of the electrostatic capacitance input device  1  according to embodiment 3 of the present application.  FIGS. 12A to 12C  are explanatory diagrams illustrating the cross-sectional configuration of the substrate  20  of the electrostatic capacitance input device  1  according to embodiment 3 of the present application.  FIGS. 12A, 12B and 12C  are cross-sectional views of the substrate  20  taken along lines A 3 -A 3 ′, B 3 -B 3 ′ and C 3 -C 3 ′ respectively shown in  FIG. 11 . It should be noted that the present embodiment is identical in basic configuration to embodiment 1. Therefore, like components are denoted by the same reference numerals, and the description thereof is omitted. 
     In the electrostatic capacitance input device  1  according to the present embodiment, the first conductive film  4   a , interlayer insulating film  214  and second conductive film  4   b  are also formed in this order, from bottom to top as seen from the substrate  20 , on the first surface  20   a  of the substrate  20  as in embodiment 1, as illustrated in  FIGS. 10A to 12C . 
     As illustrated in  FIG. 10B , the first conductive film  4   a  is formed as the plurality of relay electrodes  215  in the input region  2   a  first. Further, the same film  4   a  is formed as the plurality of wires  27  in the outer region  2   b . Here, the wires  27  have their edge portions located inside the input region  2   a . These edge portions serve as connection portions  27   a  that are wider than the wires  27 . Further, the first conductive film  4   a  is formed as the shielding auxiliary electrode  29  in the regions of the outer region  2   b  corresponding to the four sides of the substrate  20  as in embodiment 2. 
     As illustrated in  FIG. 10C , the interlayer insulating film  214  is formed only at the intersecting portions  218 , which will be described later, in the input region  2   a . The same film  214  is formed in the form of a rectangular frame in the outer region  2   b  so as to surround the input region  2   a . Here, the interlayer insulating film  214  is formed slightly more inward than the outer periphery of the substrate  20 . As a result, the interlayer insulating film  214  is not formed near the outer periphery of the substrate  20 . 
     As illustrated in  FIG. 10D , the second conductive film  4   b  is formed as a plurality of rectangular regions in the input region  2   a . These rectangular regions make up the pad portions  211   a  and  212   a  (large area portions) of the first and second input position detection electrodes  211  and  212 . Further, the same film  4   b  is formed as the shield electrode  28  in the form of a rectangular frame in the outer region  2   b . Still further, the same film  4   b  is formed in a region near the edge portion  20   e  overlapping the first and second mounting terminals  24   a  and  24   b.    
     When the first conductive film  4   a , interlayer insulating film  214  and second conductive film  4   b , that are configured as described above, are stacked one on top of another, the substrate  20  is configured as illustrated in  FIGS. 10A, 11 and 12A to 12C . When seen in plan view, the substrate  20  has the plurality of input position detection electrodes  21  formed in the input region  2   a . In the present embodiment, the input position detection electrodes  21  include the plurality of columns of first and second input position detection electrodes  211  and  212 . The first input position detection electrodes  211  (shown by thick solid lines in  FIG. 10A ) extend in the first direction (direction shown by arrow Y). The second input position detection electrodes  212  (shown by thick dashed lines in  FIG. 10A ) extend in the second direction (direction shown by arrow X). Here, of the first and second conductive films  4   a  and  4   b , the first conductive film  4   a  is used to form the input position detection electrodes  21  (first and second input position detection electrodes  211  and  212 ). As a result, the input position detection electrodes  21  are made up of the same layer. On the first surface  20   a  of the substrate  20 , therefore, the plurality of intersecting portions  218  exist between the first and second input position detection electrodes  211  and  212 . In the present embodiment, of the first and second input position detection electrodes  211  and  212 , the first input position detection electrodes  211  are connected in the Y direction by the junction portions  211   c  made of the second conductive film  4   b  at the intersecting portions  218 , thus extending in the Y direction. In contrast, the interruption portions  218   a  are formed at the intersecting portions  218  for the second input position detection electrodes  212 . Further, the relay electrodes  215  and interlayer insulating film  214  are formed with the first conductive film  4   a  at the intersecting portions  218 . It should be noted that the second input position detection electrodes  212  are electrically connected together in the X direction by the relay electrodes  215 . 
     On the other hand, although the wires  27  are formed with the first conductive film  4   a , the connection portions  27   a  are located inside the input region  2   a . Moreover, the overlying layer of the connection portions  27   a  is not covered with the interlayer insulating film  214 . Therefore, when formed with the second conductive film  4   b , the input position detection electrodes  21  overlap the connection portions  27   a  of the wires  27 . As a result, the same electrodes  21  are electrically connected to the connection portions  27   a.    
     Further, the two second mounting terminals  24   b  are formed in the outer region  2   b  on the first surface  20   a  of the substrate  20 , one on each side of the region where the first mounting terminals  24   a  are arranged. The first mounting terminals  24   a  are electrically connected to the wires  27 , and the second mounting terminals  24   b  to the shield electrode  28  on both sides of the region where the first mounting terminals  24   a  are arranged. The present embodiment is similar in other configurations to embodiment 1. Therefore, the description thereof is omitted. 
     In the input panel  2  configured as described above, of the first and second conductive films  4   a  and  4   b , the first conductive film  4   a  on the side opposite to the input operation side is used to form the wires  27  as in embodiments 1 and 2. Of the first and second conductive films  4   a  and  4   b , the second conductive film  4   b  on the input operation side is used to form the shield electrode  28 . The same electrode  28  overlaps the wires  27  on the input operation side. This provides the same advantages as in embodiment 1 including shutting out electromagnetic noise trying to find its way into the wires  27  from the input operation side thanks to the shield electrode  28 . 
     Further, the shield electrode  28  covers the side portion  214   e  on the outer periphery side of the interlayer insulating film  214  as in embodiment 2. The same electrode  28  is connected to the shielding auxiliary electrode  29  exposed from the interlayer insulating film  214  all along the longitudinal direction (extension direction) of the same electrode  29  on the outer periphery side of the interlayer insulating film  214  (in the region free from the interlayer insulating film  214 ). This provides substantially reduced resistance of the shield electrode  28 . Further, the shield electrode  28  and shielding auxiliary electrode  29  suppress electromagnetic noise from finding its way into the wires  27  from the surrounding environment. 
     Still further, in the present embodiment, the interlayer insulating film  214  is formed only at the intersecting portions  218  in the input region  2   a . Therefore, the same film  214  is hardly formed in positions overlapping the pad portions  211   a  and  212   a  of the input position detection electrodes  21  (first and second input position detection electrodes  211  and  212 ). Therefore, the input panel  2  offers high light transmittance, thus allowing for the electro-optical device  100  equipped with an input device according to the present embodiment to display a bright image. 
     Embodiment 4 
     A description will be given below of a configuration example of the type of the electrostatic capacitance input device  1 , described with reference to  FIG. 2B , with reference to  FIGS. 13A to 15C .  FIGS. 13A to 13D  are explanatory diagrams schematically illustrating the two-dimensional configuration of the electrostatic capacitance input device  1  according to embodiment 4 of the present application.  FIG. 13A  is an explanatory diagram illustrating the two-dimensional positional relationship between the electrodes and other components formed on the substrate  20  of the electrostatic capacitance input device  1 .  FIG. 13B  is an explanatory diagram illustrating the two-dimensional configuration of the first conductive film  4   a  formed on the substrate  20 .  FIG. 13C  is an explanatory diagram illustrating the two-dimensional configuration of the interlayer insulating film  214  formed on the substrate  20 .  FIG. 13D  is an explanatory diagram illustrating the two-dimensional configuration of the second conductive film  4   b  formed on the substrate  20 .  FIG. 13A  illustrates the elements shown in  FIGS. 13B, 13C and 13D  in an overlapping fashion. 
       FIG. 14  is an explanatory diagram illustrating, in an enlarged fashion, the two-dimensional configuration of the electrodes and other components formed on the substrate  20  of the electrostatic capacitance input device  1  according to embodiment 4 of the present application.  FIGS. 15A to 15C  are explanatory diagrams illustrating the cross-sectional configuration of the substrate  20  of the electrostatic capacitance input device  1  according to embodiment 4 of the present application.  FIGS. 15A, 15B and 15C  are cross-sectional views of the substrate  20  taken along lines A 4 -A 4 ′, B 4 -B 4 ′ and C 4 -C 4 ′ respectively shown in  FIG. 14 . It should be noted that the present embodiment is identical in basic configuration to embodiment 1. Therefore, like components are denoted by the same reference numerals, and the description thereof is omitted. 
     In the electrostatic capacitance input device  1  according to the present embodiment, the first conductive film  4   a , interlayer insulating film  214  and second conductive film  4   b  are formed in this order, from bottom to top as seen from the substrate  20 , on the second surface  20   b  of the substrate  20 , as illustrated in  FIGS. 13A to 15C . 
     As illustrated in  FIG. 13B , the first conductive film  4   a  is formed as a plurality of rectangular regions in the input region  2   a  first. These rectangular regions make up the pad portions  211   a  and  212   a  (large area portions) of the first and second input position detection electrodes  211  and  212 . Further, the first conductive film  4   a  is formed as the shield electrode  28  in the outer region  2   b . A potential having the same waveform (and phase) as the position detection signal VD supplied to the input position detection electrodes  21  is applied to the shield electrode  28 . 
     As illustrated in  FIG. 13C , the interlayer insulating film  214  is formed over a large region excluding the outer periphery of the substrate  20  as in embodiment 1. The contact holes  214   a  are formed in the interlayer insulating film  214 , with each set containing the four contact holes  214   a . Further, contact holes  214   b  are formed at the positions of the interlayer insulating film  214  overlapping the connection portions  27   a  of the wires  27  illustrated in  FIG. 13D . 
     As illustrated in  FIG. 13D , the second conductive film  4   b  is formed as the relay electrodes  215  overlapping the contact holes  214   a  shown in  FIG. 13C  in the input region  2   a  as in embodiment 1. Further, the same film  4   b  is formed in a region near the edge portion  20   e  overlapping first and second mounting terminals  24   a  and  24   b . Still further, the same film  4   b  is formed as the plurality of wires  27  in the outer region  2   b . The wires  27  have their edge portions located inside the input region  2   a . These edge portions serve as the connection portions  27   a  that are wider than the wires  27 . Moreover, the second conductive film  4   b  is formed as the shielding auxiliary electrode  29  in the regions of the outer region  2   b  corresponding to the four sides of the substrate  20 . Here, the first mounting terminals  24   a  are connected to the wires  27 , and the second mounting terminals  24   b  to the shielding auxiliary electrode  29 . 
     When the first conductive film  4   a , interlayer insulating film  214  and second conductive film  4   b , that are configured as described above, are stacked one on top of another, the substrate  20  is configured as illustrated in  FIGS. 13A, 14 and 15A to 15C . As a result, the plurality of input position detection electrodes  21  are formed in the input region  2   a . On the other hand, the input position detection electrodes  21  (first and second input position detection electrodes  211  and  212 ) are formed with the first conductive film  4   a , and the wires  27  with the second conductive film  4   b . Even in this case, the contact holes  214   b  are formed in the interlayer insulating film  214 . Therefore, the input position detection electrodes  21  and wires  27  are electrically connected via the contact holes  214   b.    
     Further, the two second mounting terminals  24   b  are formed in the outer region  2   b  on the first surface  20   a  of the substrate  20 , one on each side of the region where the first mounting terminals  24   a  are arranged. The first mounting terminals  24   a  are electrically connected to the wires  27 , and the second mounting terminals  24   b  to the shield electrode  28  on both sides of the region where the first mounting terminals  24   a  are arranged. The present embodiment is similar in other configurations to embodiment 1. Therefore, the description thereof is omitted. 
     In the input panel  2  configured as described above, of the first and second conductive films  4   a  and  4   b , the second conductive film  4   b  on the side opposite to the input operation side is used to form the wires  27 . Of the first and second conductive films  4   a  and  4   b , the first conductive film  4   a  on the input operation side is used to form the shield electrode  28 . The same electrode  28  overlaps the wires  27  on the input operation side. This provides the same advantages as in embodiment 1 including shutting out electromagnetic noise trying to find its way into the wires  27  from the input operation side thanks to the shield electrode  28 . 
     On the other hand, the shielding auxiliary electrode  29  is formed to the outside of the outer periphery of the interlayer insulating film  214  at the positions corresponding to the four sides of the substrate  20  as in embodiment 2. Part of the same electrode  29  is exposed from the interlayer insulating film  214 . On the other hand, the shield electrode  28  is formed to the outside of the outer periphery of the interlayer insulating film  214  at the positions corresponding to the four sides of the substrate  20 . Therefore, the shielding auxiliary electrode  29  covers the side portion  214   e  on the outer periphery side of the interlayer insulating film  214 . The shield electrode  28  is connected to the shielding auxiliary electrode  29  exposed from the interlayer insulating film  214  all along the longitudinal direction of the same electrode  29  on the outer periphery side of the interlayer insulating film  214  (in the region free from the interlayer insulating film  214 ). This provides substantially reduced resistance of the shield electrode  28 . Further, the shield electrode  28  and shielding auxiliary electrode  29  suppress electromagnetic noise from finding its way into the wires  27  from the surrounding environment. 
     Embodiment 5 
     A description will be given of a configuration example based on embodiment 4 in which the input position detection electrodes  21  are formed with the second conductive film  4   b  with reference to  FIGS. 16A to 18C .  FIGS. 16A to 16D  are explanatory diagrams schematically illustrating the two-dimensional configuration of the electrostatic capacitance input device  1  according to embodiment 5 of the present application.  FIG. 16A  is an explanatory diagram illustrating the two-dimensional positional relationship between the electrodes and other components formed on the substrate  20  of the electrostatic capacitance input device  1 .  FIG. 16B  is an explanatory diagram illustrating the two-dimensional configuration of the first conductive film  4   a  formed on the substrate  20 .  FIG. 16C  is an explanatory diagram illustrating the two-dimensional configuration of the interlayer insulating film  214  formed on the substrate  20 .  FIG. 16D  is an explanatory diagram illustrating the two-dimensional configuration of the second conductive film  4   b  formed on the substrate  20 .  FIG. 16A  illustrates the elements shown in  FIGS. 16B, 16C and 16D  in an overlapping fashion. 
       FIG. 17  is an explanatory diagram illustrating, in an enlarged fashion, the two-dimensional configuration of the electrodes and other components formed on the substrate  20  of the electrostatic capacitance input device  1  according to embodiment 5 of the present application.  FIGS. 18A to 18C  are explanatory diagrams illustrating the cross-sectional configuration of the substrate  20  of the electrostatic capacitance input device  1  according to embodiment 5 of the present application.  FIGS. 18A, 18B and 18C  are cross-sectional views of the substrate  20  taken along lines A 5 -A 5 ′, B 5 -B 5 ′ and C 5 -C 5 ′ respectively shown in  FIG. 17 . It should be noted that the present embodiment is identical in basic configuration to embodiment 1. Therefore, like components are denoted by the same reference numerals, and the description thereof is omitted. 
     In the electrostatic capacitance input device  1  according to the present embodiment, the first conductive film  4   a , interlayer insulating film  214  and second conductive film  4   b  are formed in this order, from bottom to top as seen from the substrate  20 , on the second surface  20   b  of the substrate  20 , as illustrated in  FIGS. 16A to 18C . 
     As illustrated in  FIG. 16B , the first conductive film  4   a  is formed as the relay electrodes  215  at the positions of the input region  2   a  overlapping the contact holes  214   a  which will be described later. Further, the first conductive film  4   a  is also formed as the shield electrode  28  in the outer region  2   b.    
     As illustrated in  FIG. 16C , the interlayer insulating film  214  is formed over a large region excluding the outer periphery of the substrate  20  as in embodiment 1. The contact holes  214   a  are formed in the interlayer insulating film  214 , with each set containing the four contact holes  214   a.    
     As illustrated in  FIG. 16D , the second conductive film  4   b  is formed as a plurality of rectangular regions in the input region  2   a  first. These rectangular regions make up the pad portions  211   a  and  212   a  (large area portions) of the first and second input position detection electrodes  211  and  212 . Further, the same film  4   b  is formed in a region near the edge portion  20   e  overlapping first and second mounting terminals  24   a  and  24   b . Still further, the same film  4   b  is formed as the plurality of wires  27  in the outer region  2   b . Moreover, the second conductive film  4   b  is formed as the shielding auxiliary electrode  29  in the regions of the outer region  2   b  corresponding to the four sides of the substrate  20 . Here, the first mounting terminals  24   a  are connected to the wires  27 , and the second mounting terminals  24   b  to the shielding auxiliary electrode  29 . 
     When the first conductive film  4   a , interlayer insulating film  214  and second conductive film  4   b , that are configured as described above, are stacked one on top of another, the substrate  20  is configured as illustrated in  FIGS. 16A, 17 and 18A to 18C . As a result, the plurality of input position detection electrodes  21  (first and second input position detection electrodes  211  and  212 ) are formed in the input region  2   a.    
     Further, the two second mounting terminals  24   b  are formed in the outer region  2   b  on the first surface  20   a  of the substrate  20 , one on each side of the region where the first mounting terminals  24   a  are arranged. The first mounting terminals  24   a  are electrically connected to the wires  27 , and the second mounting terminals  24   b  to the shield electrode  28  on both sides of the region where the first mounting terminals  24   a  are arranged. The present embodiment is similar in other configurations to embodiment 1. Therefore, the description thereof is omitted. 
     In the input panel  2  configured as described above, of the first and second conductive films  4   a  and  4   b , the second conductive film  4   b  on the side opposite to the input operation side is used to form the wires  27 . Of the first and second conductive films  4   a  and  4   b , the first conductive film  4   a  on the input operation side is used to form the shield electrode  28 . The same electrode  28  overlaps the wires  27  on the input operation side. This provides the same advantages as in embodiment 1 including shutting out electromagnetic noise trying to find its way into the wires  27  from the input operation side thanks to the shield electrode  28 . 
     Further, the shielding auxiliary electrode  29  is formed to the outside of the outer periphery of the interlayer insulating film  214  at the positions corresponding to the four sides of the substrate  20  as in embodiment 2. Part of the same electrode  29  is exposed from the interlayer insulating film  214 . On the other hand, the shield electrode  28  is formed to the outside of the outer periphery of the interlayer insulating film  214  at the positions corresponding to the four sides of the substrate  20 . Therefore, the shielding auxiliary electrode  29  covers the side portion  214   e  on the outer periphery side of the interlayer insulating film  214 . The shield electrode  28  is connected to the shielding auxiliary electrode  29  exposed from the interlayer insulating film  214  all along the longitudinal direction of the same electrode  29  on the outer periphery side of the interlayer insulating film  214  (in the region free from the interlayer insulating film  214 ). This provides substantially reduced resistance of the shield electrode  28 . Further, the shield electrode  28  and shielding auxiliary electrode  29  suppress electromagnetic noise from finding its way into the wires  27  from the surrounding environment. 
     OTHER EMBODIMENTS 
     In the embodiments described above, only either of the first and second conductive films  4   a  and  4   b  is used to form the first and second input position detection electrodes  211  and  212 . However, both of the first and second conductive films  4   a  and  4   b  may be used to form the same electrodes  211  and  212 . For example, the first conductive film  4   a  may be used to form the first input position detection electrodes  211 , and the second conductive film  4   b  to form the second input position detection electrodes  212 . 
     In the embodiments described above, the first or second conductive film  4   a  or  4   b  is used to form the shield electrode  28  on the input operation side for the wires  27 . Alternatively, however, the light-shielding layer  90   a  in the cover  90  shown in  FIGS. 2A and 2B  may be formed with a conductive film such as chromium and used as a shield electrode. 
     In the embodiments described above, a liquid crystal device is used as the image generating device  5 . Alternatively, however, an organic electroluminescence device may be used as the image generating device  5 . 
     [Examples of Incorporation into Electronic Equipment] 
     A description will be given next of electronic equipment to which the electro-optical device  100  equipped with an input device according to any one of the embodiments described above is applied.  FIG. 19A  illustrates the configuration of a laptop personal computer having the electro-optical device  100  equipped with an input device. A personal computer  2000  includes the electro-optical device  100  equipped with an input device as a display unit and a main body section  2010 . A power switch  2001  and keyboard  2002  are provided on the main body section  2010 .  FIG. 19B  illustrates the configuration of a mobile phone having the electro-optical device  100  equipped with an input device. A mobile phone  3000  includes a plurality of operation buttons  3001  and scroll buttons  3002  and the electro-optical device  100  equipped with an input device as a display unit. The screen displayed on the electro-optical device  100  equipped with an input device can be scrolled by manipulating the scroll buttons  3002 .  FIG. 19C  illustrates the configuration of a personal digital assistant (PDA) to which the electro-optical device  100  equipped with an input device is applied. A PDA  4000  includes a plurality of operation buttons  4001 , a power switch  4002  and the electro-optical device  100  equipped with an input device as a display unit. A variety of information such as address book and schedule book is displayed on the electro-optical device  100  equipped with an input device by manipulating the operation buttons  4001 . 
     It should be noted that electronic equipment to which the electro-optical device  100  equipped with an input device is applied includes not only those illustrated in  FIGS. 19A to 19C  but also digital still cameras, liquid crystal TV sets, viewfinders and monitor-direct-viewing video tape recorders, car navigators, pagers, electronic organizers, electronic calculators, word processors, workstations, TV phones, POS terminals and bank terminals. The electro-optical device  100  equipped with an input device is applicable as a display section of these various pieces of electronic equipment. 
     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.