JP3283937B2 - Drawing pad and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drawing pad suitable for inputting a handwritten image, and more particularly, to an electrode formed on a substrate which is hardly damaged even by a plurality of sliding inputs by an input pen. In addition, the present invention relates to a drawing pad capable of inputting an image with a lower pen pressure than a conventional drawing pad.

[0002]

2. Description of the Related Art Conventionally, there has been known a drawing pad (touch panel) which includes a pair of substrates with electrodes, and is arranged at regular intervals via insulating spacers such that the electrode surfaces of the respective substrates face each other. ing. As a substrate of such a drawing pad, a transparent substrate such as a glass plate or a plastic film is usually used. In addition, a transparent conductive film such as ITO is usually formed on one surface of these substrates as an electrode. Further, at least one of the pair of substrates with electrodes has flexibility.

In such a drawing pad, when the input pen is pressed on the substrate of the substrate with input electrodes, the pressing portion is bent or distorted, and the electrodes formed on both substrates are brought into contact with the pressing portion. I do. Therefore, when characters, figures, and the like are drawn on the input-side electrode-attached substrate with the input pen, the electrodes formed on both substrates come into contact with each other in accordance with the trajectory of the sliding of the input pen. Then, position coordinates (x, y) along the sliding locus are electrically detected, and an image is input to the drawing pad.

In the process of inputting an image to the drawing pad in this way, the electrode surface formed on the flexible substrate slightly rubs in response to the movement of the input pen, and as a result, the electrode surface formed on both substrates is moved. When the applied electrodes come into contact with each other, friction occurs between the electrodes at the contact portion.

[0005] In such a conventional drawing pad, when the input is repeated many times due to the repetition of the friction, there is a problem that the electrodes formed on at least one of the substrates are damaged.

Further, the conventional drawing pad has a problem that a sufficient image cannot be input to the drawing pad unless the pen pressure is increased.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to overcome the above-mentioned problems of the prior art, and an electrode formed on a substrate is damaged even when a drawing pad is slid many times by an input pen. It is an object of the present invention to provide a drawing pad which is difficult to perform and can input an image with a lower pen pressure than a conventional drawing pad, and a method of manufacturing the same.

[0008]

SUMMARY OF THE INVENTION A drawing pad according to the present invention is a drawing pad comprising at least two substrates having electrodes formed on one surface thereof arranged so that the electrodes face each other. One electrode surface is treated with an insulating chain organic compound having a functional group capable of binding to an electrode material.

The above-mentioned drawing pad according to the present invention comprises a pair of drawing pads comprising a coating liquid comprising a chain organic polymer compound having a functional group capable of binding to an electrode material dissolved or dispersed in an organic solvent. Of the electrodes, is applied on at least one electrode surface, and then the substrate having the electrode coated with the coating solution is heated and dried, thereby treating the electrode surface with an insulating chain organic polymer compound. It can be manufactured including steps.

[0010] The drawing pad according to the present invention comprises at least one of a pair of electrodes in which a coating liquid containing a compound having an inorganic reactive group and an organic reactive group in the same molecule is contained in the drawing pad. Is applied on the electrode surface, and then a coating solution containing the organic reactive group and the chain organic polymer compound reactive with the organic reactive group is applied on the electrode surface. It can also be manufactured by including a step of drying by heating and thereby treating the electrode surface with an insulating chain organic polymer compound.

[0011]

DETAILED DESCRIPTION OF THE INVENTION The drawing pad according to the present invention will be specifically described below with reference to the drawings. FIG. 1 shows an example of a drawing pad according to the present invention.

This drawing pad is composed of an upper substrate 14 (input side) on which the electrode 11 is formed and a lower substrate 15 on which the electrode 12 is formed, via the insulating chain organic polymer layer 13, 12 are arranged so that the distance between the electrodes 11 and 12 is constant.

The upper substrate 14 shown in FIG. 1 is made of a material having a certain degree of flexibility, for example, a plastic film such as a polyethylene terephthalate film (hereinafter referred to as a PET film). Images such as characters and figures are input with an input pen (not shown).
Electrode 11 made of a conductive thin film such as an ITO thin film
Are formed.

The upper substrate 14 on which the electrodes 11 are formed
Is not particularly limited as long as it is bent or distorted to the extent that the upper and lower electrodes at the positions pressed by the tip of the input pen when drawing with the input pen touch each other. The thickness of the upper substrate 14 that satisfies such a condition, including the thickness of the electrode 11, is preferably 50 μm to 1 mm.

The lower substrate 15 is made of a glass substrate or the like. On the surface of the substrate 15, an electrode 12 made of a conductive thin film such as an ITO thin film is formed. The lower substrate 15 may be flexible or rigid, and is not particularly limited, but is preferably a transparent substrate such as glass.

In the drawing pad 1 shown in FIG. 1, the surface of the electrode 11 is treated with a chain organic polymer compound having a functional group capable of binding to the electrode material. A polymer layer 13 is formed. Each of the chain organic polymer compounds forming the insulating chain organic polymer layer 13 is chemically bonded to the electrode material constituting the electrode 11, whereby the surface of the electrode 11 has a whisker-like or net-like shape. Apparently coated with an insulating chain organic polymer compound.

In the drawing pad 1 shown in FIG. 1, the insulating chain organic polymer layer 13 is formed only on the upper substrate 14, but may be formed on the lower substrate 15 or both the upper and lower substrates 14 and 15. good.

In a conventional drawing pad, the upper substrate 1
4 and the lower substrate 15 are arranged such that the electrodes 11 and 12 formed thereon are spaced apart from each other and opposed to each other.
Since the insulating chain organic polymer layer 13 is formed on at least one of the surfaces of the upper and lower substrates 1 and 12,
The drawing pad 1 can be formed by bringing the surfaces of the electrodes 11 and 12 of the electrodes 4 and 15 into contact with each other. Even when the upper and lower substrates 14 and 15 are brought into contact with each other to form the drawing pad 1, conduction does not occur between the respective electrodes 11 and 12 unless a load is applied to one of the upper and lower substrates.

Of course, like the conventional pad, the upper and lower substrates 1
There is no problem even if a spacer is interposed between 4 and 15. The chain organic polymer compound used for the electrode surface treatment as described above has one or more functional groups per molecule at the molecular end and / or in the molecular chain that can bond to the electrode material.

Examples of the chain organic high molecular compound forming the main chain of the chain organic high molecular compound having a functional group capable of binding to the electrode material include polyethylene, polypropylene, polystyrene, polyvinyl chloride, and polyvinyl chloride. Polyacrylates such as vinyl acetate, polyvinyl acetal, polyacrylic acid, polymethacrylic acid, and polymethyl acrylate, polymethacrylates such as polymethyl methacrylate, polyacrylonitrile, polyacrylamide, polytetrafluoroethylene, and polyvinylidene fluoride , Polybutadiene, polyisoprene, propylene / ethylene copolymer, ethylene / vinyl acetate copolymer, polycarbonate, polyethylene terephthalate, aromatic polyester, polyethylene oxide and the like.

Transparent drawing pads are widely used as drawing pads. Electrodes made of an inorganic compound such as ITO are formed on upper and lower substrates of the transparent drawing pad. In this case, a group having reactivity with an inorganic compound (hereinafter referred to as an inorganic reactive group) as a functional group capable of binding to an electrode material, for example, a chain organic polymer compound having a hydroxyl group or an alkoxy group is used. Examples of such an inorganic reactive group include, for example, the following formula [I]:

[0022]

Embedded image

Wherein R ₁ , R ₂ and R ₃ are each independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, a and b are each an integer of 0 to 2; Is an integer of 1 to 3, and a + b + c = 3) is preferable, and an inorganic compound which forms an electrode at the —OR ³ group (hydroxyl or alkoxy group) site of the above formula [I] Combine with Further, instead of Si, Ti
Alternatively, a functional group composed of Zr may be used.

When the electrode surface is treated with a chain polymer compound having such a functional group at the molecular terminal, the electrode surface is covered with a whisker-like (fibrous) polymer compound. When the electrode surface is treated with a polymer compound having a functional group in a molecular chain, the electrode surface is covered with a network compound.

The number average molecular weight of the chain organic polymer having a functional group capable of binding to the electrode material is 1,000.
~ 200,000, especially 10,000-100,000
It is preferable that In the drawing pad having the chain organic polymer compound having a number average molecular weight of less than 1,000 between the electrodes, the friction generated between the electrodes of the drawing pad when inputting an image to the drawing pad with an input pen is sufficiently small. Can not do it. For this reason, in the drawing pad having such a chain organic polymer compound between the electrodes, it is not possible to sufficiently reduce damage to the electrodes caused when sliding input is repeated many times with the input pen. Conversely, the number average molecular weight is 20
In the case of a drawing pad having more than 000 of the chain organic polymer compound between the electrodes, the input load when performing pen input may be too high or input may not be possible.

Among the chain organic polymer compounds having a functional group capable of binding to the electrode material, the chain organic polymer compound used for surface treatment of an electrode formed of an inorganic compound such as ITO is a silane cup. A compound having an inorganic reactive group and an organic reactive group in the same molecule, such as a ring agent and a titanium coupling agent, and a chain organic polymer compound having a functional group showing reactivity with the organic reactive group. Synthesized from

Here, a silane coupling agent will be described as an example. a) First, a functional group that is reactive with a group such as an amino group, a vinyl group, or an epoxy group of a silane coupling agent at the molecular terminal and / or in the molecular chain of the above-described chain organic polymer compound. Is introduced. For example, for a silane coupling agent having an amino group, a carboxyl group reactive with the amino group is introduced into the molecular terminal and / or the molecular chain of the above-mentioned chain organic polymer compound.

B) Next, the chain organic polymer compound having such a functional group introduced therein is reacted with a silane coupling agent. In the present invention, as a method of treating the electrode surface with a chain organic polymer compound having a functional group capable of binding to the electrode material synthesized by the above method, the chain polymer compound is dissolved in an organic solvent. The coating solution dissolved or dispersed in
The substrate is coated on the electrode surface of the substrate with electrodes by a coating means such as a bar coater, a spinner, a roll coater or dipping, and then dried by heating.

In the above-mentioned coating solution, an organic solvent having a relatively low boiling point such as ethanol, isopropanol, butanol, acetone, methyl ethyl ketone, and ethyl acetate is preferably used. These organic solvents are used alone or in combination of two or more.

The concentration of the chain organic high molecular compound contained in the coating solution is preferably 0.1 to 10% by weight. The abrasion resistance of both electrodes of the drawing pad and the minimum input load required for image input are adjusted by the type and concentration of the chain organic polymer compound.

For example, if the concentration of the chain organic polymer compound is less than 0.1, the amount of the insulating chain organic polymer compound bonded to the electrode surface is insufficient. In some cases, the scratch resistance cannot be sufficiently imparted to both electrodes of the pad. Conversely, when the concentration of the chain organic polymer compound exceeds 10% by weight, the amount of the insulating chain organic polymer compound bonded to the electrode surface increases, and when an image is input to the drawing pad, When a large input load is required and the amount of the insulating chain organic polymer compound is too large, it is impossible to input to the drawing pad with the input pen no matter how much the input load is increased.

When the substrate with electrodes coated with such a coating liquid is heated and dried, the temperature on the electrode surface is 100 to 150.
C. is preferred. The following method is also possible as a method of treating the electrode surface with a chain polymer compound.

First, a coating solution containing a compound having an inorganic reactive group and an organic reactive group in the same molecule, such as a silane coupling agent, is applied to the electrode surface, and the inorganic reactive group of the compound is removed. React with electrode material. Next, a coating solution containing a chain organic polymer compound in which a functional group having reactivity with the organic reactive group is introduced into a molecular terminal or a molecular chain by the method described above on the electrode surface coated with the compound. It is treated with an insulating chain polymer compound by applying and reacting the functional group of the chain organic polymer compound with an organic reactive group contained in the compound such as a silane coupling agent. Electrodes are obtained.

[0034]

As is apparent from the above description, according to the present invention, at least one of the pair of electrodes of the drawing pad is made of a chain organic polymer compound having a functional group capable of binding to an electrode material. Since the insulated chain-like polymer compound layer is formed on the treated and surface-treated electrode surface, the electrodes of the transparent electrode plate are unlikely to be damaged even if the sliding input with the input pen is repeated many times on the drawing pad. . Therefore, the drawing pad according to the present invention has excellent scratch resistance, and can perform sliding input repeatedly many times.

The drawing pad according to the present invention can input an image with a lower pen pressure than a conventional drawing pad. Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to these examples.

[0036]

EXAMPLES 1-a) Synthesis of Chain Polymer Compound A In a four-necked flask, 20 g of polyoxyethylene methyl ether (POE) having a number average molecular weight of 5.0 × 10 ³ and 8 g of succinic anhydride were added. Next, after degassing the inside of the four-necked flask, nitrogen gas was introduced into the inside of the four-necked flask, thereby changing the atmosphere inside the four-necked flask to a nitrogen gas atmosphere. Thereafter, 120 g of 1,2-dichloroethane as a solvent and 1 g of pyridine as a catalyst were added to the inside of the four-necked flask. 8 of these mixtures
After stirring at 0 ° C. for 72 hours, the obtained reaction mixture was subjected to suction filtration, and the filtrate was collected. 1,2-Dichloroethane and pyridine were removed from the filtrate by an evaporator to obtain a white powdery reaction product. This white powder was dissolved in 40 g of water, diethyl ether was added to the resulting aqueous solution, and this liquid was separated into an aqueous phase and an organic phase. After chloroform was added to the obtained aqueous phase, it was separated into an aqueous phase and a chloroform phase, and the reaction product contained in the aqueous phase was extracted with chloroform. The reaction product obtained by evaporating and removing chloroform from the chloroform phase is dissolved in benzene, then diethyl ether is added to a benzene solution of the reaction product, and the resulting liquid is cooled on ice to produce a purified reaction product. A white precipitate of the product was obtained. This white precipitate was filtered by suction, and then dried under reduced pressure to obtain a purified polyoxyethylene methyl succinate having a carboxyl group.

While cooling the eggplant-shaped flask containing a mixture of 10 g of the polyoxyethylene methyl succinate thus obtained, 400 g of chloroform as a solvent and 1.06 g of dicyclohexylcarbodiimide as a catalyst, the mixture was cooled for 2 hours. Stirred. After stirring, 1.36 g of aminopropyltriethoxysilane was added to the mixture, and the mixture was allowed to react at 5 ° C. for 24 hours. Then, chloroform is evaporated and removed from the obtained reaction mixture, and then benzene is added to the reaction mixture to obtain a benzene solution of a reaction product.Diethyl ether is added to the benzene solution, and the obtained liquid is cooled with ice. Gave a white precipitate of the reaction product. The white precipitate was dissolved with ethyl acetate, and the undissolved precipitate in the ethyl acetate solution was removed by suction filtration. Ethyl acetate in the filtrate was evaporated and removed by an evaporator, and the obtained solid was dried under reduced pressure to obtain a chain polymer compound A having POE as a main chain. 1-b) Synthesis of Chain Polymer B After degassing the inside of the three-necked flask, nitrogen gas was introduced into the three-necked flask, thereby changing the atmosphere inside the three-necked flask to a nitrogen gas atmosphere. . Thereafter, styrene 20 purified by vacuum distillation was placed in the three-necked flask.
g, 3-mercaptopropionic acid 0.4 g, 2,2′-
0.82 g of azobisisobutyronitrile and 40 g of dry tetrahydrofuran as a solvent were added. Then, the mixture was stirred and reacted at 70 ° C. for 6 hours.
The solvent was evaporated and removed from the obtained reaction mixture to obtain a white powdery reaction product. This white powder was dissolved in benzene, methanol was added to the obtained benzene solution, and the mixture was cooled with ice, whereby a white precipitate of a reaction product was obtained. The white precipitate is subjected to suction filtration, and then dried under reduced pressure to obtain a polystyrene having a carboxyl group at a molecular terminal (PS).
t) 16.3 g of a purified product were obtained. The number average molecular weight of the obtained PSt was measured to be 1.2 × 10 ⁴ by gel permeation chromatography (GPC).

The PSt 5.75 thus obtained was obtained.
g, a mixture of 100 g of chloroform as a solvent and 0.1 g of dicyclohexylcarbodiimide as a catalyst while cooling the eggplant-shaped flask with ice.
Stirred for hours. After stirring, 0.13 g of aminopropyltriethoxysilane was added to the mixture, and the mixture was allowed to react at 5 ° C. for 24 hours. Then, chloroform was evaporated and removed from the obtained reaction mixture, and benzene was added to the reaction mixture to obtain a benzene solution of a reaction product.Methanol was added to the benzene solution, and the obtained liquid was cooled with ice. A white precipitate of the reaction product was obtained. The white precipitate was dissolved with ethyl acetate, and the undissolved precipitate in the ethyl acetate solution was removed by suction filtration. Ethyl acetate in the filtrate was evaporated and removed by an evaporator, and the obtained solid was dried under reduced pressure to obtain a chain polymer compound B having PSt as a main chain. 1-c) Synthesis of Chain Polymer Compound C After degassing the inside of a three-necked flask, nitrogen gas was introduced into the inside of the three-necked flask, thereby changing the atmosphere inside the three-necked flask to a nitrogen gas atmosphere. . Thereafter, 5 g of methyl methacrylate purified by vacuum distillation and 0.14 of 3-mercaptopropionic acid were placed in the three-necked flask.
g, 2,2'-azobisisobutyronitrile 0.07 g
And 10 g of dry tetrahydrofuran was added as a solvent. Next, these mixtures were stirred and reacted at 60 ° C. for 3 hours, and then the solvent was evaporated and removed from the obtained reaction mixture to obtain a white powdery reaction product. This white powder was dissolved in benzene, hexane was added to the obtained benzene solution, and the mixture was cooled with ice, whereby a white precipitate of a reaction product was obtained. The white precipitate was subjected to suction filtration and then dried under reduced pressure to obtain 3.3 g of a purified polymethyl methacrylate (PMMA) having a carboxyl group at a molecular terminal.
The number average molecular weight of the obtained PMMA was measured to be 8.5 × 10 ³ by the GPC method.

The mixture thus obtained was stirred for 2 hours while ice-cooling an eggplant type flask containing a mixture of 2 g of PMMA thus obtained, 100 g of chloroform as a solvent and 0.049 g of dicyclohexylcarbodiimide as a catalyst. After stirring, 0.13 g of aminopropyltriethoxysilane was added to the mixture, and the mixture was allowed to react at 5 ° C. for 24 hours. Then, chloroform was evaporated and removed from the obtained reaction mixture, and benzene was added to the reaction mixture to obtain a benzene solution of a reaction product.Hexane was added to the benzene solution, and the obtained liquid was cooled with ice. A white precipitate of the reaction product was obtained. The white precipitate was dissolved with ethyl acetate, and the undissolved precipitate in the ethyl acetate solution was removed by suction filtration. Ethyl acetate in the filtrate was evaporated and removed by an evaporator, and the obtained solid was dried under reduced pressure to obtain a chain polymer compound C having PMMA as a main chain. 1-d) Synthesis of Chain Polymer D After degassing the inside of the three-necked flask, nitrogen gas was introduced into the three-necked flask, whereby the atmosphere inside the three-necked flask was changed to a nitrogen gas atmosphere. . Thereafter, vinyl acetate 1 purified by vacuum distillation was placed inside the three-necked flask.
5 g, 4,4'-azobis (4-cyanoisovaleric acid)
0.15 g and 5 g of methanol as a solvent were added.
Next, the mixture was stirred and reacted at 60 ° C. for 4 hours, and then the solvent was evaporated and removed from the obtained reaction mixture to obtain a white powdery reaction product. This white powder was dissolved in dioxane, diethyl ether was added to the obtained dioxane solution, and the mixture was cooled with ice, whereby a white precipitate of the reaction product was obtained. The white precipitate was subjected to suction filtration and then dried under reduced pressure to obtain 12.1 g of a purified polyvinyl acetate (PVAc) having a carboxyl group at a molecular terminal.
The number average molecular weight of the obtained PVAc was measured to be 1.3 × 10 ⁵ by the GPC method.

The mixture thus obtained was stirred for 2 hours while cooling an eggplant-shaped flask containing a mixture of 6 g of PVAc thus obtained and 100 g of chloroform as a solvent with ice. After stirring, 0.026 g of aminopropyltriethoxysilane was added to the mixture, and the mixture was allowed to react at 5 ° C. for 24 hours. Then, chloroform is evaporated and removed from the obtained reaction mixture, and then dioxane is added to the reaction mixture to obtain a dioxane solution of a reaction product.Diethyl ether is added to the dioxane solution, and the obtained liquid is cooled with ice. Gave a white precipitate of the reaction product. The white precipitate was dissolved with ethyl acetate, and the undissolved precipitate in the ethyl acetate solution was removed by suction filtration. Ethyl acetate in the filtrate was evaporated and removed by an evaporator, and the obtained solid was dried under reduced pressure to obtain a chain polymer compound D having PVAc as a main chain.

[0041]

Example 1 An indium oxide molded product containing 5% by weight of tin oxide was subjected to an oxygen partial pressure of 3 × 10 ^-4 using an electron gun of 2 kW.
Torr, deposition rate of 3 Å / sec, 1
A PET film F ₀ on which a transparent electrode was formed was obtained by vapor deposition on a 125 μm-thick polyethylene terephthalate (PET) film preheated to 00 ° C.

Then, instead of the PET film, a thickness of 1.1
used mm glass substrate, except for preheating the glass substrate 400 ° C. was obtained a glass substrate G ₀ which transparent electrodes in the same manner as described above is formed.

50 g of the above chain polymer compound A was gradually added to 950 g of tetrahydrofuran with stirring at room temperature to obtain a dispersion of the chain polymer compound A. After immersing the PET film with electrode F ₀ in the dispersion, the PET film with the electrode is pulled up from the dispersion at a speed of 2 mm / sec, and then heated and dried at 120 ° C. for 30 minutes to obtain an electrode surface. There was obtained an electrode with PET film F ₁ treated with the chain polymeric compound.

A metal ball having a diameter of 10 mm is placed on the electrode surface of the PET film with electrode F ₁ and 20
g, 40 g, 60 g, and 80 g were measured for friction coefficient and abrasion resistance by applying a surface property tester (HAIDON-14 manufactured by Shinto Chemical Co., Ltd.). The scratch resistance was determined by sliding the metal ball once on the electrode surface while applying the above load, and then observing with a microscope whether or not the electrode surface was damaged. In this case, the scratch resistance was evaluated as good.

The results are shown in Table 1. Next, the glass substrate with electrode G ₀ and the PET film with electrode F ₁ are arranged so that their respective electrode surfaces are in contact with each other via a chain polymer compound, and the electrode of the PET film with electrode F ₁ is connected to the upper electrode. and (input side), the electrode of the glass with the electrode substrate G ₀ is to produce a drawing pad and the lower electrode.

The following characteristics were evaluated for the obtained drawing pad. (1) Necessary input load The PET film on which the upper electrode is formed is pressed by applying a load perpendicular to the PET film with a polyacetal resin press having a radius of curvature R of 1 mm and 2 mm at the tip, and gradually applying the load. While increasing, measure the resistance between the upper and lower electrodes, find the load value when this resistance is 2 kΩ or less, and the load value required to input this load value to the drawing pad screen with the input pen Was evaluated.

(2) Durability 300 g of the PET film on which the upper electrode is formed
The ball-point pen was reciprocally slid on the PET film while being pressed with a commercially available ball-point pen under a load of, and the number of reciprocations until the linearity of the pad became poor was evaluated as durability.

(3) Input state The PET film on which the upper electrode is formed is pressed with a polyacetal resin pressing member having a tip with a radius of curvature R of 2 mm by applying a load of 200 g perpendicular to the PET film, and the characters and characters are pressed. The deviation between the input position and the display position when the figure was written and the presence or absence of an input missing portion were observed, and the input state was evaluated to be good when there was no deviation between the input position and the display position and no input missing portion.

Table 2 shows the results.

[0050]

Example 2 5 g of the above chain polymer compound B was gradually added to 995 g of tetrahydrofuran while stirring at room temperature to obtain a dispersion of the chain polymer compound B.

After immersing the PET film with electrode F ₀ obtained in Example 1 in this dispersion, the PET film with the electrode was pulled up from the dispersion at a speed of 1 mm / sec, and then at 120 ° C. for 30 minutes. By heating and drying,
Electrode surface to obtain a PET film F ₂ with electrode treated with the chain polymeric compound.

The measurement of the coefficient of friction of the electrode surface of the PET film with electrode F ₂ and the evaluation of the scratch resistance were carried out in the same manner as in Example 1. The results are also shown in Table 1.

A drawing pad was manufactured in the same manner as in Example 1 except that the PET film with electrodes F ₂ was used, and the required input load, durability, and input state of the obtained drawing pad were set in the same manner as in Example 1. Measured and evaluated.

The results are also shown in Table 2.

[0055]

Example 3 20 g of the above chain polymer compound C was gradually added to 980 g of tetrahydrofuran with stirring at room temperature to obtain a dispersion of the chain polymer compound C.

After the PET film with electrode F ₀ obtained in Example 1 was immersed in the dispersion, the PET film with the electrode was pulled up from the dispersion at a speed of 2 mm / sec, and then at 120 ° C. for 30 minutes. By heating and drying,
Electrode surface to obtain a PET film F ₃ with electrode treated with the chain polymeric compound.

The coefficient of friction and scratch resistance of the electrode-coated PET film F ₃ electrode surface were measured and evaluated in the same manner as in Example 1. The results are also shown in Table 1.

[0058] except for using the PET film F ₃ with electrodes prepared drawing pad in the same manner as in Example 1, the required input load of the resulting drawn pad, similarly durability and input conditions as in Example 1 Measured and evaluated.

The results are also shown in Table 2.

[0060]

Example 4 3 g of the chain polymer compound D was gradually added to 997 g of tetrahydrofuran with stirring at room temperature to obtain a dispersion of the chain polymer compound D.

After immersing the PET film with electrode F ₀ obtained in Example 1 in the dispersion, the PET film with the electrode was pulled up from the dispersion at a speed of 2 mm / sec, and then at 120 ° C. for 30 minutes. By heating and drying,
Electrode surface to obtain a PET film F ₄ with electrode treated with the chain polymeric compound.

The friction coefficient and abrasion resistance of the electrode surface of the PET film with electrode F ₄ were measured and evaluated in the same manner as in Example 1. The results are also shown in Table 1.

A drawing pad was manufactured in the same manner as in Example 1 except that the PET film with electrodes F ₄ was used, and the required input load, durability and input state of the obtained drawing pad were the same as in Example 1. Measured and evaluated.

Table 2 also shows the results.

[0065]

[Comparative Example 1] A coefficient of friction and scratch resistance of the PET film F ₀ electrode surface with the electrode obtained in Example 1 were measured and evaluated in the same manner as in Example 1.

The results are shown in Table 1.

[0067]

Comparative Example 2 Glass Substrate G with Electrode Obtained in Example 1₀
To reduce the temperature of the electrode surface formed on the glass substrate.
While maintaining the temperature at 60 ° C., a polyester resin
(Toyobo Co., Ltd. Byron) 40 parts by weight of methyl ethyl
The coating solution contained in 960 parts by weight of
The spray rate is 30 ml / min and the pressure is 2 kg / cm ^Two
Spray for 1 minute at an interval of 1 m from the electrode surface.
Dry at 20 ° C to remove hemispherical insulating dot spacers
Formed.

The height G of the dot spacer is 3 μm, and the diameter d of the dot spacer on the electrode surface is 10 μm.
m, and the average distance L between the centers of the adjacent dot spacers was 60 μm. Note that d and L were obtained by taking an electron micrograph of the electrode surface on which the dot spacers were formed, and averaging the measured values of the ten dot spacers. G was determined by measuring with a stylus type surface roughness meter.

The apex of the dot spacer of the glass substrate G ₁ with electrodes and the PET film F with electrodes obtained in Example 1
_A drawing pad was manufactured by arranging the drawing pads so that the electrode surfaces of the drawing pads were in contact with each other, and the required input load, durability, and input state of the obtained drawing pad were measured and evaluated in the same manner as in Example 1.

The results are shown in Table 2.

[0071]

[Table 1]

[0072]

[Table 2]

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a drawing pad according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 drawing pad 11 upper electrode 12 lower electrode 13 insulating chain organic polymer layer 14 upper substrate 15 lower substrate

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-206116 (JP, A) JP-A-3-63812 (JP, A) JP-A-62-297921 (JP, A) (58) Investigation Field (Int. Cl. ⁷ , DB name) G06F 3/03 315

Claims (4)

(57) [Claims] 1. A drawing pad in which two substrates having electrodes formed on one surface are arranged so that the electrodes face each other, wherein at least one electrode surface of the two substrates has an electrode material. A drawing pad, wherein the drawing pad is treated with an insulating chain organic compound having a functional group capable of binding to the organic compound. 2. The functional group capable of binding to the electrode material is represented by the following formula [I]: (Wherein, R ₁ , R ₂ and R ₃ are each independently a hydrogen atom or an alkyl group having 1 to 4 carbon atoms,
a and b are each an integer of 0 to 2, c is an integer of 1 to 3, and a + b + c = 3. ), Wherein the number average molecular weight of the chain organic polymer compound is 1,000 to 2
2. The drawing pad according to claim 1, wherein the number is 00,000. 3. A manufacturing method for producing a drawing pad by arranging two substrates having electrodes formed on one surface thereof so that the electrodes face each other, comprises a chain organic material having a functional group capable of binding to an electrode material. A coating solution in which a polymer compound is dissolved or dispersed in an organic solvent is applied on at least one electrode surface of the two substrates,
Next, a method for manufacturing a drawing pad, comprising a step of drying the applied electrode surface and thereby treating the electrode surface with an insulating chain organic polymer compound. 4. A method for manufacturing a drawing pad by arranging two substrates having electrodes formed on one surface thereof such that the electrodes face each other, wherein an inorganic reactive group and an organic reactive group are contained in the same molecule. A coating solution containing a compound having the following formula is applied on at least one electrode surface of the two substrates, and then a coating solution containing a chain organic polymer compound having a functional group reactive with the organic reactive group is provided. A method for producing a drawing pad, comprising a step of applying the composition on the electrode surface, drying the applied electrode surface, and treating the electrode surface with an insulating chain organic polymer compound.