JP2009289037A - Coordinate input device and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce contact resistance, in a coordinate input device having a transparent organic conductive film used for a resistance film, without deterioration of optical transmittance of the transparent organic conductive film. <P>SOLUTION: The coordinate input device includes: a first substrate which supports a first resistance film; and a second substrate which supports a second resistance film and is arranged, with respect to the first substrate, to be separated from and opposite to the first resistance film. One of the first and second substrates is pressurized at a pressurizing point, and the respective sections of the first and second resistance films corresponding to the pressurizing point are brought into contact with each other, whereby coordinates at the pressurizing point are read. At least the first resistance film includes a transparent organic conductive film, and the transparent organic conductive film includes pores having a size of 10-500 nm in the film. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention generally relates to a coordinate input device, and more particularly to a coordinate input device having a resistive film.

  With the spread and progress of portable information devices in recent years, electronic notebooks, PDAs (Personal Digital Assistants), mobile phones, PHS, calculators, watches, GPS (Global Positioning System, Global Positioning System, etc.) Coordinate input that is performed by pressing a screen with a pen or a finger in a mobile information processing apparatus, or in a fixed information processing apparatus such as a bank ATM system, a vending machine, or a POS (Point Of Sales) system. The adoption of equipment for man-machine interfaces is expanding.

  In these high-function information processing devices, the miniaturization and multi-functionalization of the devices are progressing due to the advancement of semiconductor technology. The percentage of the housing is increasing.

As such a coordinate input device, a first resistive film in which an electrode pair opposed in the first direction is formed, and a second electrode pair formed in a second direction orthogonal to the first direction are formed. A resistance film and a small distance away from each other, and the first resistance film and the second resistance film are brought into contact with each other by pressing with a pressing tool such as a pen or a finger at one point on the input surface; A coordinate input device (coordinate input device) configured to calculate the X coordinate and the Y coordinate of the contact point by measuring the resistance value of the first resistance film and the resistance value of the second resistance film is proposed. Has been.
JP 2006-100217 A

  In particular, in a coordinate input device using an organic conductive film as a resistance film, the contact resistance at the pressing point increases due to the high resistivity of the organic conductive film, which may cause problems such as a decrease in input sensitivity and a delay in coordinate input time. is there.

  In order to solve this problem, it is conceivable to increase the film thickness of the organic conductive film used as the resistance film and reduce the resistivity of the film. However, when the film thickness of the organic conductive film is increased, the light absorption by the organic conductive film increases, and when the coordinate input device is combined with a display device such as a liquid crystal display device, the display is colored and the display quality is improved. The problem of lowering occurs.

  According to one aspect, the coordinate input device carries a first substrate carrying a first resistive film and a second resistive film, and the second resistive film is in contact with the first substrate. A second substrate disposed so as to face and separate from the first resistive film, pressing one of the first and second substrates at a pressing point, and In the coordinate input device for reading the coordinates of the pressing point by contacting each portion corresponding to the pressing point in the resistance film, at least the first resistance film includes a transparent organic conductive film, and the transparent organic conductive film Includes pores having a size in the range of 10 nm to 500 nm.

  According to another aspect, a method of manufacturing a coordinate input device includes a first substrate carrying a first resistance film, a second resistance film, and the second resistance against the first substrate. And a second substrate disposed so as to face the first resistive film so as to be spaced apart from the first resistive film, pressing one of the first and second substrates at a pressing point, and And manufacturing a coordinate input device that reads the coordinates of the pressing point by contacting each portion corresponding to the pressing point in the second resistance film, and the first resistance film is formed on the first substrate. The method includes at least a step of forming a transparent organic conductive film as a resistance film by a coating method, and a step of heating the transparent organic conductive film, wherein the heating step has a temperature of the transparent organic conductive film of 115 ° C. or higher and 130 ° C. Heat within 60 seconds to a temperature range not exceeding.

  According to the present invention, the coated transparent organic conductive film is heated to a predetermined drying temperature in a short time of 60 seconds or less, preferably 40 seconds or less by controlling the temperature profile of the drying process. In addition, a large number of holes having a size of 10 nm to 500 nm, that is, a size equal to or smaller than a half wavelength of the incident light wavelength can be generated. The vacancies thus formed increase the apparent film thickness of the transparent organic conductive film. As a result, the current path in the film increases and the specific resistance of the film is reduced. In such a transparent organic conductive film, even if the film thickness is increased, the mass of the organic conductive film does not change. Therefore, light absorption does not increase, and even if the coordinate input device is combined with a liquid surface display device, the display is possible. The display quality is not deteriorated by coloring. Further, since the holes have a size equal to or less than a half wavelength of the incident light wavelength, there is no optical influence on the display.

  FIG. 1 shows the configuration of the coordinate input device 40.

  Referring to FIG. 1, a coordinate input device 40 includes a glass substrate 21 carrying a transparent conductive film 32 made of ITO on an upper surface, and a glass substrate 21 facing the glass substrate 21 with a spacer member 23 therebetween. For example, the transparent organic conductive film 42 having a transparent organic conductive film 42 supported on the side facing 21 is formed. The transparent organic conductive film 42 and the transparent conductive film 32 are, for example, 700 μm by the spacer member 23. They are arranged at a certain interval.

  Further, electrode patterns 33A and 34A extending continuously in the X-axis direction are formed on a pair of edges of the transparent conductive film 32 facing in the Y-axis direction, and the electrode pattern 33A is formed on the glass substrate 21. The wiring pattern 33 leads to the terminal portions 33T and 33S on the glass substrate 21. Similarly, the electrode pattern 34 </ b> A is drawn out to the terminal portions 34 </ b> T and 34 </ b> S on the glass substrate 21 by the wiring pattern 34 on the glass substrate 21.

  In addition, electrode patterns 43A and 44A that extend continuously in the Y-axis direction are formed on a pair of edges of the transparent organic conductive film 42 facing in the X-axis direction, and the electrode pattern 43A is formed on the transparent resin substrate. 22 is drawn out to the terminal portions 43T and 43S on the resin substrate 22 by the wiring pattern 43 on the resin substrate 22. Similarly, the electrode pattern 44 </ b> A is drawn out to the terminal portions 44 </ b> T and 44 </ b> S on the glass substrate 21 by the wiring pattern 44 on the transparent resin substrate 21.

  Furthermore, wiring patterns 35 and 38 that contact the terminal portions 43T and 43S on the transparent resin substrate 22 are formed on the glass substrate 21, and the wiring patterns 35 and 38 are formed on the transparent resin substrate 42. The electrode pattern 43A is drawn out to the terminal portions 35T and 38T on the glass substrate 21, respectively. Similarly, wiring patterns 36 and 37 are formed on the glass substrate 21 so as to contact the terminal portions 44T and 44S on the transparent resin substrate 22, and the wiring patterns 36 and 37 are formed on the transparent resin substrate 42. The electrode pattern 44A is drawn out to the terminal portions 36T and 37T on the glass substrate 21, respectively.

  2 and 3 are diagrams showing the operation of the coordinate input device 40 of FIG.

  Referring to FIG. 2, the surface of the transparent resin substrate 22 is pressed by a stylus pen 40P at a certain pressing point (X1, Y1), whereby the transparent organic conductive film 42 carried on the transparent resin substrate 22 is formed. The ITO film 32 carried on the glass substrate 21 is contacted at the pressing point (X1, Y1).

  Therefore, in the state of FIG. 2, one of the electrodes 43A and 44A, in the example of FIG. 2A, the power supply voltage Vcc is supplied to the electrode 43A, the other is grounded, and resistance division (RX1, RX1) is performed at the pressing point (X1, Y1). The voltage drop caused by RX2) is obtained by measuring the potential Vsx of the ITO film 32 that contacts the transparent organic conductive film 42 at the pressing point (X1, Y1). Thereby, the X coordinate of the pressing point is obtained.

  Next, in the state of FIG. 3, one of the electrodes 33A and 34A, in the example of FIG. 2B, the power supply voltage Vcc is supplied to the electrode 33A, the other is grounded, and resistance division (RY1) is performed at the pressing point (X1, Y1). , RYX2) is obtained by measuring the potential Vsy of the transparent organic conductive film 42 that contacts the transparent organic conductive film 42 at the pressing point (X1, Y1). Thereby, the Y coordinate of the pressing point is obtained.

  4A and 4B are diagrams illustrating a process of forming the transparent organic conductive film 42 on the transparent resin substrate 22.

  Referring to FIG. 4A, a precursor film 42P of a transparent organic conductive film 42 dissolved in a solvent is applied on the transparent resin substrate 22 to form a precursor film 42Q. Further, the precursor film 42Q formed in this manner is subjected to a rapid heating treatment as shown in FIG. 4B, and is expanded and simultaneously dried to obtain a desired transparent organic conductive film 42.

  In the transparent organic conductive film 42 thus obtained, by appropriately controlling the rapid heating treatment, 10 nm to 500 nm in the film of the transparent organic conductive film 42 as schematically shown in FIG. A large number of holes 42p having a size equal to or smaller than a half wavelength of the wavelength of the incident light and having no influence on the optical characteristics, that is, the transmittance can be formed. The transparent organic conductive film 42 thus obtained has a film thickness much smaller than the film thickness of the precursor film 42Q immediately after the coating as a result of the removal of the solvent, but the heat treatment is performed in a normal recipe. Compared to the case, the film thickness is increased by 5% to 70%. As a result, in the transparent organic conductive film 42 thus obtained, it becomes possible to reduce the contact resistance without reducing the optical characteristics, that is, the light transmittance, and in the coordinate input device, the input sensitivity is improved, It is also possible to suppress the problem of input delay.

  Examples of the present invention will be described below.

  In Example 1, a thiophene-based precursor (PEDOT-PSS) dissolved in water was used as the precursor 42P of the transparent organic conductive film 42, and this was formed on a PET (polyethylene terephthalate) substrate 22 according to the procedure described in FIG. 4A. The precursor film 42Q was formed to a thickness of 25 μm by a coating method. Further, the PET substrate 22 on which the precursor film 42Q is thus formed is placed on a hot plate maintained at 120 ° C., and the temperature is changed from 120 ° C.-5 ° C. to 120 ° C. + 10 according to the temperature curve A shown in FIG. The temperature was rapidly raised in 40 seconds to a target temperature controlled in the range of 115C to 130C. Further, after the rapid temperature increase, the substrate 22 was held at the same temperature for 360 seconds and dried to obtain a thiophene-based organic conductive film 42 having a thickness of 200 nm.

  FIG. 7 shows a cross-sectional structure of a transparent organic conductive film 42 made of a thiophene derivative that has been subjected to such rapid heat treatment, as observed with an electron microscope. In FIG. 7, it can be seen that there is a large whitish region in the transparent organic conductive film 42, which is the hole 42p in FIG. The scale in FIG. 7 shows a size of 500 nm. In the cross-sectional view of FIG. 7, it was confirmed that the area ratio of the holes 42p in the film was in the range of 5% to 70%. Actually, the area ratio of the holes 42p is often 30% or less.

  Further, an ITO film having a surface resistivity of 400Ω / □ was formed on the glass substrate 21 as the counter electrode 32, and the coordinate input device 40 shown in FIG.

  A load of 4.9 N was applied to the coordinate input device 40 thus manufactured with a stylus having a tip curvature of 0.8 R, and the minimum load (input load) at which coordinate input was obtained by pressing the stylus was measured.

  Table 1 shows the input weight measured for the coordinate input device of Example 1 and the value of the light transmittance of the transparent organic conductive film 42. The light transmittance is measured with a spectrophotometer.

As shown in Table 1, in the coordinate input device of Example 1, it was confirmed that the input load was 0.2 N and the light transmittance was 96%.

  In the coordinate input device 40 of the first embodiment, the resistive film 32 on the glass substrate 21 is formed from the ITO film of the first embodiment under the same conditions as the transparent organic conductive film 42. Therefore, the similar holes 42p are formed. The thickness was changed to a transparent organic conductive film having a thickness of 200 nm. That is, in this embodiment, the resistance films 32 and 42 are both formed of a transparent organic conductive film. The measurement conditions are the same as in Example 1.

  Table 1 shows the input weight measured for the coordinate input device 40 of Example 2 and the value of the light transmittance measured with the spectrophotometer of the transparent organic conductive film 42.

  As shown in Table 1, in the coordinate input device of Example 2, it was confirmed that the input load was 0.2 N and the transmittance was 96%.

  In Example 3, the heating and drying of the transparent organic conductive film 42 on the PET substrate 22 in the step of FIG. 4B is controlled in the range of 120 ° C.−5 ° C. to 120 ° C. + 10 ° C. according to the temperature curve B shown in FIG. The temperature was rapidly raised in 60 seconds to the target temperature. Further, after the rapid temperature increase, the substrate 22 is dried at a temperature between 120 ° C. and 130 ° C. for 160 seconds.

  In Example 3, the coordinate input device 40 was assembled in the same manner as in Example 1 using the transparent organic conductive film 42 thus formed.

  Table 1 shows the input weights measured for the coordinate input device of Example 3 and the light transmittance values measured with the spectrophotometer of the transparent organic conductive film 42.

  As shown in Table 1, in the coordinate input device 40 of Example 3, it was confirmed that the input load was 0.2 N and the light transmittance was 96%.

  In Example 4, the thickness of the transparent organic conductive film 42 was increased to 400 nm in the coordinate input device 40 of Example 1, and the curve B in FIG. 6 was used as the temperature curve. Other configurations and measurement conditions are the same as those in the first embodiment. In curve B, the temperature of the substrate 22 reaches 120 ° C. 60 seconds after the start of temperature increase, and then the temperature is raised to 125 ° C. and held, and dried for 160 seconds. In the transparent organic conductive film 42 thus formed, holes having a major axis of 30 nm to 300 nm and a minor axis of 10 nm to 50 nm were formed in the film having a thickness of 400 nm.

  In Example 4, the coordinate input device 40 was assembled in the same manner as in Example 1 using the transparent organic conductive film 42 thus formed.

  Table 1 shows the input weight measured for the coordinate input device of Example 4 and the value of the light transmittance measured with the spectrophotometer of the transparent organic conductive film 42.

  As shown in Table 1, in the coordinate input device of Example 4, it was confirmed that the input load was 0.2 N and the light transmittance was 94%.

  In Example 5, in the panel configuration of the coordinate input device 40 shown in Example 1, the surface resistivity of the ITO film on the glass substrate 21 was changed to 1 kΩ / □, and the input weight was measured under the same conditions. The results are shown in Table 1.

As can be seen from Table 1, it was confirmed that the minimum input weight was 0.4 N and the light transmittance was 96%.
(Comparative Example 1)
In Comparative Example 1, a thiophene-based film having a thickness of 200 nm was used as the transparent organic conductive film, and a coordinate input device having the same configuration as that of Example 1 was produced. At that time, the coordinate input device was used in the heat treatment process of FIG. 4B. The temperature curve is changed to a conventional temperature curve C shown in FIG. In curve C, the temperature of the substrate 22 reaches 110 ° C. in 100 seconds after the start of heating, but is thereafter held at 110 ° C. and drying is performed for about 170 seconds. When the cross section of the transparent organic conductive film 42 thus obtained was observed with an electron microscope, a gap structure having a major axis of 10 nm to 20 nm and a minor axis of 1 nm to 10 nm was formed in the transparent organic conductive film 42 having a thickness of 200 nm. Formation was observed.

  The input weight was measured for the coordinate input device according to Comparative Example 1 obtained as described above. The results are shown in Table 1.

As can be seen from Table 1, the minimum input weight increases to 1.5N, and it can be seen that an input time delay occurs. It can also be seen that the light transmittance is reduced to 92%.
(Comparative Example 2)
In Comparative Example 2, the coordinate input device 40 shown in Example 1 was manufactured by using both the resistance films 32 and 42 using a thiophene derivative. However, the temperature curve is changed to curve C.

  Table 1 shows the input weight measured for the coordinate input device 40 of Comparative Example 2 and the transmittance value measured by the spectrophotometer of the transparent organic conductive film 42.

As can be seen from Table 1, in the coordinate input device 40 of the comparative example 2, it can be seen that the minimum input weight increases to 1.5 N and an input time delay occurs. It can also be seen that the light transmittance is reduced to 92%.
(Comparative Example 3)
In Comparative Example 3, a coordinate input device 40 having the same configuration as that of Example 1 was prepared using a thiophene derivative as the transparent organic conductive film 42 as in Example 1. However, the temperature curve is changed to curve C, and the surface resistivity of the ITO film on the substrate 21 is changed to 400Ω / □.

  Table 1 shows the input weight measured for the coordinate input device of Comparative Example 3 and the value of the light transmittance measured with the spectrophotometer of the transparent organic conductive film 42.

As can be seen from Table 1, in the coordinate input device 40 of the comparative example 3, it can be seen that the minimum input weight increases to 4N and an input time delay occurs. It can also be seen that the light transmittance is reduced to 92%.
(Comparative Example 4)
In Comparative Example 4, a coordinate input device 40 having the same configuration as in Example 1 was produced using a thiophene derivative as the transparent organic conductive film 42 as in Example 1. However, the temperature curve is changed to curve C, and the thickness of the transparent organic conductive film 42 is 400 nm. When the cross section of the transparent organic conductive film 42 thus obtained was observed with an electron microscope, a gap structure having a major axis of 10 nm to 20 nm and a minor axis of 1 nm to 10 nm was formed in the transparent organic conductive film 42 having a thickness of 200 nm. Formation was observed.

  Table 1 shows the input weight measured for the coordinate input device 40 of Comparative Example 4 and the value of the light transmittance measured with the spectrophotometer of the transparent organic conductive film 42.

  As can be seen from Table 1, in the coordinate input device 40 of Comparative Example 4, although the minimum input weight is 0.5 N and the input time delay is reduced, the light transmittance is significantly reduced to 87%.

  Thus, according to the present invention, in the coordinate input device using a transparent organic conductive film as a resistance film, when the coating film of the transparent organic conductive film is dried, it is less than 100 seconds, more preferably 60 seconds or less, and still more preferably. Is about 120 ° C. in a time of 40 seconds or less, more specifically, by raising the substrate temperature to a temperature range of 115 ° C. or more and not exceeding 130 ° C., the size of 10 nm to 500 nm in the transparent organic conductive film Voids can be formed, and as a result of the formation of such holes, the apparent film thickness of the transparent organic conductive film can be increased. Thereby, the surface resistivity of a transparent organic electrically conductive film falls, and it becomes possible to reduce the input weight of a coordinate input device. Further, in the transparent organic conductive film having an increased film thickness in this way, the mass of the film itself is not changed, so that there is no problem that the light transmittance is deteriorated.

  In the above description, the case where the organic transparent conductive film is made of a thiophene derivative has been described. However, the present invention also applies to the case where the organic transparent conductive film is composed of polyacetylene, polypyrrole, polythiophene, polyphenylene vinylene, and derivatives thereof. It is valid.

  In addition, although the coating film formation of the said transparent organic electrically conductive film 42 was performed by the blade coating in this embodiment, you may carry out by the coating film-forming methods, such as die coating, gravure coating, spray coating, and dip coating. 4B may be started immediately after application, or may be started after an appropriate leveling time.

  In the previous embodiment, the film thickness of the transparent organic conductive film 42 is 200 nm or 400 nm. However, in the coordinate input device of the present invention, the transparent organic conductive film 42 can be formed to a thickness of 100 nm to 1000 nm. It is. When polyacetylene is used as the transparent organic conductive film 42, toluene or xylene can be used as a solvent in forming the precursor 42P. When polypyrrole is used, water, toluene, or xylene can be used as a solvent in forming the precursor 42P. When using polythiophene, water can be used as a solvent in forming the precursor 42P. When polyphenylene vinylene is used, toluene or xylene can be used as a solvent.

  In addition to air, the holes 42p can be filled with a resin such as polyester, epoxy, acrylic, polyvinyl alcohol, or polyvinyl chloride, or a resin obtained by adding a silane coupling agent to these resins. Such filling can be performed, for example, by immersing the transparent organic conductive film 42 of FIG. 5 in a precursor of these resins. The holes 42p are connected to each other through fine cracks and the like. When the transparent organic conductive film 42 is immersed in the precursor, the resin component is contained in the transparent organic conductive film 42 by capillary action. It penetrates through the cracks and fills the holes 42p.

  4B can be executed by sequentially passing the substrate 22 over an infrared heater in a mass production process.

As mentioned above, although this invention was described about preferable embodiment, this invention is not limited to this specific embodiment, A various deformation | transformation and change are possible within the summary described in the claim.
(Appendix 1)
A first substrate carrying a first resistive film;
A second substrate carrying a second resistance film and disposed so as to face the first substrate with the second resistance film facing away from the first resistance film;
With
One of the first and second substrates is pressed at a pressing point, the portions corresponding to the pressing point in the first and second resistance films are brought into contact with each other, and the coordinates of the pressing point are read. In the coordinate input device,
At least the first resistance film includes a transparent organic conductive film,
The transparent organic conductive film includes a pore having a size in the range of 10 nm to 500 nm in the film.
(Appendix 2)
The coordinate input device according to appendix 1, wherein the holes are filled with a material other than the material of the transparent organic conductive film.
(Appendix 3)
The coordinate input device according to appendix 1 or 2, wherein an area ratio of the holes in a cross-sectional structure of the transparent organic conductive film is in a range of 5% to 70%.
(Appendix 4)
The coordinate input device according to supplementary note 3, wherein an area ratio of the holes in the cross-sectional structure of the transparent organic conductive film is 30% or less.
(Appendix 5)
5. The coordinate input device according to claim 1, wherein the transparent organic conductive film has a thickness of 100 nm to 1000 nm.
(Appendix 6)
The coordinate input device according to claim 1, wherein the second resistance film is made of a material different from that of the transparent organic conductive film.
(Appendix 7)
A first substrate carrying a first resistance film and a second resistance film are carried, and the second resistance film faces the first substrate with a distance from the first resistance film. A second substrate arranged in such a manner that one of the first and second substrates is pressed at a pressing point and corresponds to the pressing point of the first and second resistive films. A method for manufacturing a coordinate input device for contacting each part to read the coordinates of the pressing point,
Forming a transparent organic conductive film as the first resistance film on the first substrate by a coating method;
Heating the transparent organic conductive film at a predetermined drying temperature;
Including at least
In the heating process, the temperature of the transparent organic conductive film is raised to the predetermined drying temperature within 90 seconds.
(Appendix 8)
The manufacturing method of the coordinate input device according to appendix 7, wherein the predetermined drying temperature is 115 ° C or higher and does not exceed 130 ° C.

It is a disassembled perspective view which shows the structure of a coordinate input device. It is a figure explaining operation | movement of the coordinate input device of FIG. It is a figure explaining operation | movement of the coordinate input device of FIG. FIG. 2 is a diagram (No. 1) for forming a transparent organic conductive film in the coordinate input device of FIG. 1. FIG. 3 is a diagram (No. 2) for forming a transparent organic conductive film in the coordinate input device of FIG. 1. It is a figure which shows the schematic structure of a transparent organic electrically conductive film. It is a figure which shows the temperature curve used by this invention. It is a figure of the electron micrograph which shows the void | hole formed in the transparent organic electrically conductive film.

Explanation of symbols

21 Glass substrate 22 Resin substrate 23 Spacer 32 Transparent conductive film 33A, 34A, 43A, 44A Electrode 33-38, 43, 44 Wiring pattern 42 Transparent organic conductive film 43S, 43T, 44S, 44T Terminal portion

Claims (5)

A first substrate carrying a first resistive film;
A second substrate carrying a second resistance film and disposed so as to face the first substrate with the second resistance film facing away from the first resistance film;
With
One of the first and second substrates is pressed at a pressing point, the portions corresponding to the pressing point in the first and second resistance films are brought into contact with each other, and the coordinates of the pressing point are read. In the coordinate input device,
At least the first resistance film includes a transparent organic conductive film,
The transparent organic conductive film includes a pore having a size in the range of 10 nm to 500 nm in the film.   The coordinate input device according to claim 1, wherein an area ratio of the pores in a cross-sectional structure of the transparent organic conductive film is in a range of 5% to 70%.   The coordinate input device according to claim 1, wherein the transparent organic conductive film has a thickness of 100 nm to 1000 nm. A first substrate carrying a first resistance film and a second resistance film are carried, and the second resistance film faces the first substrate with a distance from the first resistance film. A second substrate arranged in such a manner that one of the first and second substrates is pressed at a pressing point and corresponds to the pressing point of the first and second resistive films. A method for manufacturing a coordinate input device for contacting each part to read the coordinates of the pressing point,
Forming a transparent organic conductive film as the first resistance film on the first substrate by a coating method;
Heating the transparent organic conductive film at a predetermined drying temperature;
Including at least
In the heating step, the temperature of the transparent organic conductive film is raised to the predetermined drying temperature within 60 seconds.   5. The method of manufacturing a coordinate input device according to claim 4, wherein the predetermined drying temperature is 115 ° C. or higher and does not exceed 130 ° C.