KR20080025467A - Structure of the touch panel using electrostatic capacitive type possible to anti-virus and organic contamination protecting and process method thereof - Google Patents

Abstract

A structure of a capacitance type antibacterial touch panel capable of preventing organic contamination and a method of manufacturing the touch panel are provided to form a linearization pattern and an overcoating layer to protect a transparent conductive layer of the touch panel so as to secure the durability of the touch panel. A capacitance type antibacterial touch panel capable of preventing organic contamination includes a glass substrate(10), a first transparent conductive layer(40) for correctly detecting a touch position of an object touching the touch panel, a second transparent conductive layer(20) for shielding noise, and a shield pattern(30) for attenuating noise. The touch panel further includes a linearization pattern(50) which is formed on the first transparent conductive layer to correct linearity from a distorted signal structurally generated in the touch panel and uniformly distributes a voltage produced in the touch panel to secure linearity, a first overcoating layer(70) for protecting a conductive coat film of the touch panel and attenuating noise, and a second overcoating layer for preventing contaminations.

Description

Structure of the touch panel using electrostatic capacitive type possible to anti-virus and organic contamination protecting and process method

1A and 1B are views showing the structure of a capacitive touch panel capable of preventing antibacterial and organic pollution according to an embodiment of the present invention.

2 is a view showing for explaining the operation principle of the capacitive touch panel capable of preventing antibacterial and organic pollution according to an embodiment of the present invention.

3 is a view showing for explaining the principle of the photocatalytic reaction in the capacitive touch panel capable of preventing antibacterial and organic pollution according to an embodiment of the present invention.

4 is a manufacturing flow chart of the capacitive touch panel capable of preventing antibacterial and organic pollution according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10 Glass substrate 20, 40 First, second transparent conductive film

30: shield pattern 50: linearity pattern

60: first overcoating film 70: second overcoating film

80 electrode 90 touch panel

100: touch panel controller

The present invention relates to a structure of a capacitive touch panel capable of preventing antibacterial and organic pollution and a method of manufacturing the same. Particularly, in order to secure linearity from the distorted signal structurally generated in the capacitive touch panel, the SiO ₂ solution is spin coated on the surface of the transparent conductive film and the linear pattern formed of silver paste. By forming the overcoat film uniformly, the transparent conductive film of the touch panel can be protected and durability is ensured, and the overcoat film is uniformly formed by spin coating the TiO ₂ solution that causes the photocatalytic reaction on the linear pattern and the surface of the transparent conductive film. Or by coating with a TiO ₂ solution on the surface of the overcoating film coated with SiO ₂ solution to form a double overcoating film. Foreign matter is decomposed small, causing the photocatalytic reaction It can be readily washed with washing by the TiO ₂ based overcoat film and relates to a structure and a manufacturing method of a touch panel of a sanitary manner viruses antimicrobial and possible organic antifouling capacitance can be reduced.

As computers using digital technology are developed, auxiliary devices are also being developed. Computer aids include monitors, keyboards, mice, microphones, speakers, and the like. In particular, keyboards and mice are devices used to input external data into a computer. The keyboard is used to input data by typing keys, and the mouse is an input device used to move a cursor or other object on the screen. However, a more effective and convenient way is to input data to a computer as a user touches the screen of a monitor connected to the computer to issue a command. For example, when using a computer to process graphics, it is much easier for a user to process graphics using a computer because it is much easier for a user to draw graphics on paper using a pen directly than to work with a keyboard or mouse. I am experiencing a lot of inconvenience.

However, if a touch panel is provided and a graphic is processed directly on the screen of the touch panel using a touch pen, the graphics can be processed very easily and precisely because it is the same principle as drawing a picture directly on paper. Accordingly, auxiliary devices such as keyboards and mice are gradually disappearing, and more and more portable devices with a touch panel are being widely used. For example, in the case of a PDA (Personal Digital Assistant), the keypad on which the touch panel is mounted to form keys for inputting data by hand disappears, and instead inputs data through a method of manipulating the screen of the touch panel with a touch pen. Or command operation is being performed.

By the way, when a person touches the screen of the touch panel, conventionally always applies a constant current to the touch panel, so when a person with high conductivity touches the touch panel, a lot of current flows unnecessarily and consumes unnecessary current. When a person with low conductivity touches the touch panel, there is a problem in that the touch position is not accurately detected.

In addition, if a person frequently touches the screen of the touch panel, organic matters may adhere to the surface of the touch panel due to contaminants or fingerprints on the hands, which may not look good and may cause a slight decrease in accuracy when a large amount of organic matter is accumulated. have.

The present invention has been conceived to solve the above problems, the present invention is a linear pattern formed of silver paste (silver paste) to ensure the linearity from the distorted signal structurally generated in the capacitive touch panel Capacitive touch panel with antimicrobial and organic pollution prevention that can protect durability of the transparent conductive film of the touch panel by spin coating the SiO ₂ solution on the surface of the transparent conductive film to form an overcoat uniformly. Its purpose is to provide a structure and a method of manufacturing the same.

It is also an object of the present invention to form a uniform overcoat layer by spin coating a TiO ₂ solution that causes a photocatalytic reaction on the surface of the linear pattern and the transparent conductive film or to form a TiO ₂ solution on the surface of an overcoat film coated with a SiO ₂ solution. By forming a double overcoating film by coating with a double layer, the capacitive type antimicrobial and organic pollution prevention is possible. The present invention provides a structure of a touch panel and a method of manufacturing the same.

In addition, an object of the present invention is the structure of the capacitive touch panel capable of antimicrobial and organic pollution that can be easily washed by cleaning by the TiO ₂ -based overcoating film that causes the photocatalytic reaction and can also reduce the sanitary virus and its manufacture To provide a way.

The structure of the capacitive touch panel capable of preventing antibacterial and organic pollution according to a preferred embodiment of the present invention for achieving the above object is to distribute the voltage generated in the transparent conductive film, the touch panel to ensure the linearity A glass substrate on which a linear pattern formed of a paste, a shield pattern, and a single or double overcoating film are formed; A first transparent conductive film formed of ITO or ATO on the front surface of the glass substrate to accurately detect a touch position of an object touched by the touch panel; A second transparent conductive film for shielding noise by forming a back portion of the glass substrate as ITO; A shield pattern formed of silver paste on the rear surface of the second transparent conductive film to reduce noise; Formed with silver paste on the front surface of the first transparent conductive film to form a linearity correction from the distorted signal structurally generated in the touch panel, by linearly distributing the voltage generated in the touch panel through power supply A linearity pattern to secure; A first overcoat layer uniformly spin-coated with SiO ₂ -based coating solution on the upper surface of the linear pattern and the surface of the first transparent conductive layer to protect the conductive coating layer of the touch panel and reduce noise; A second overcoating film which is coated with a TiO ₂ solution on the surface of the first overcoating film to prevent dirt or foreign matters from being contaminated and the foreign matters are smallly decomposed by a photocatalytic oxidation and decomposition reaction and can be easily washed by cleaning; Characterized in that the configuration.

In the present invention, the surface of the second overcoating layer coated with the TiO ₂ solution is difficult to be contaminated with dust or foreign matters due to the self-cleaning action by ultraviolet rays, and even if contaminated, the foreign matters are smallly decomposed by photocatalytic oxidation and decomposition reactions. And, it is characterized in that it is easily washed by the ultra-hydrophilic characteristics by washing.

In addition, the manufacturing method of the capacitive touch panel capable of preventing antibacterial and organic pollution according to the preferred embodiment of the present invention, the first and second transparent to correct linearly from the distortion signal structurally generated in the touch panel on the glass substrate Etching the conductive film; Forming first and second transparent conductive films coated with one of ITO and ATO, which are first and second transparent conductive films, on the front and rear surfaces of the glass substrate; Forming a shield pattern on the rear surface of the second transparent conductive film by using a silver paste to reduce noise; A linear pattern process formed of silver paste to correct linearly from the distorted signal structurally generated in the touch panel at the front surface of the first transparent conductive film; Drying to remove the solvent component remaining in the linear pattern formed of the silver paste; After the drying process, in order to protect the conductive coating layer of the touch panel and reduce noise, the first overcoating layer is formed by uniformly coating with a SiO ₂ coating solution on the upper surface of the linear pattern and the surface of the transparent conductive film by SiO ₂ coating solution. Process; Forming a first overcoating layer and then firing the coating layer to mechanically bond the pattern to the glass substrate; Cutting the cell to a predetermined size according to the use environment after the firing step; A bonding process for supplying power by soldering a terminal of the flexible and flat tail to the electrode by soldering; A linearity test process of inspecting reliability of the touch panel; Appearance inspection and packaging process for assembling the touch panel; Characterized in that it comprises a.

In the present invention, by spin-coating with a TiO ₂ solution on the surface of the first overcoating layer to prevent contamination of dust or foreign matters, small foreign matters are decomposed small by photocatalytic oxidation, decomposition reaction, and can be easily washed by cleaning Forming a second overcoating film; It characterized in that it further comprises.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Like reference numerals in the drawings denote like elements.

1A and 1B are views showing the structure of a capacitive touch panel capable of preventing antibacterial and organic pollution according to an embodiment of the present invention, and FIG. 2 is an antibacterial and organic pollution according to an embodiment of the present invention. Figure 3 is a view showing the operation principle of the capacitive touch panel capable of preventing, Figure 3 illustrates the principle of the photocatalytic reaction in the capacitive touch panel capable of preventing antibacterial and organic pollution according to an embodiment of the present invention It is a figure shown for description.

As shown in FIGS. 1A and 1B, the structure of the capacitive touch panel 90 capable of preventing antibacterial and organic pollution has a silver structure to uniformly distribute voltages generated in the transparent conductive film and the touch panel to secure linearity. A glass substrate 10 having a linear pattern formed of a paste, a shield pattern, and a single or double overcoating film formed thereon; A first transparent conductive film 40 formed of ITO or ATO on the front surface of the glass substrate to accurately detect a touch position of an object touched by the touch panel; A second transparent conductive film 20 for shielding noise by forming a back portion of the glass substrate as ITO; A shield pattern 30 formed of silver paste on the rear surface of the second transparent conductive film to reduce noise; Formed with silver paste on the front surface of the first transparent conductive film to form a linearity correction from the distorted signal structurally generated in the touch panel, by linearly distributing the voltage generated in the touch panel through power supply A linearity pattern 50 to secure; A first overcoating layer 60 which is uniformly spin coated with a SiO ₂ based coating solution on the upper surface of the linear pattern and the first transparent conductive layer to protect the conductive coating layer of the touch panel and reduce noise; The second overcoating layer 70 may be coated with a TiO ₂ solution on the surface of the first overcoating layer to prevent contamination of dust or foreign matters, and the foreign matters may be smallly decomposed by a photocatalytic oxidation and decomposition reaction, and may be easily washed by cleaning. ; It consists of.

Looking at the function of the technical means constituting the capacitive touch panel 90 capable of preventing the antibacterial and organic pollution as follows.

The glass substrate 10 is formed of a linear pattern formed of a silver paste, a shield pattern, and a single or double overcoating layer in order to uniformly distribute voltages generated in the transparent conductive film and the touch panel, thereby securing the linearity. Soda lime glass.

The first and second transparent conductive films 40 and 20 form a front portion and a rear portion of the glass substrate by ITO or ATO to shield the conductive coating layer. Here, ITO or ATO (Antimon Tin Oxide) is formed on the front surface of the glass substrate, and ITO (Indium Tin Oxide) is formed on the rear surface of the glass substrate.

The shield pattern 30 is formed of silver paste on the rear surface of the second transparent conductive film to reduce noise.

The linearity pattern 50 is formed on the front surface of the first transparent conductive film by using a silver paste to correct linearity from a distorted signal structurally generated in the touch panel, and a voltage generated in the touch panel through power supply. By uniformly distributing to ensure linearity. In the linearity pattern process, the linearity pattern is to form a silver paste by any one of a dry etching method using a silkscreen method and a laser.

The first overcoating layer 60 may be uniformly spin-coated with an SiO ₂ coating solution on the upper surface of the linear pattern and the surface of the first transparent conductive layer to protect the conductive coating layer of the touch panel and reduce noise.

The second overcoating layer 70 is coated with a TiO ₂ solution on the surface of the first overcoating layer to prevent dirt or foreign substances from being contaminated, and the foreign matters are smallly decomposed by photocatalytic oxidation and decomposition reactions, and can be easily cleaned by cleaning. It can be.

As shown in FIG. 2, the operation principle of a capacitive touch panel capable of preventing antibacterial and organic pollution is as follows.

The touch panel 90 includes a glass substrate 10, corners of the first and second transparent conductive films 40 and 20 attached to the glass substrate 10, and the first and second transparent conductive films 40 and 20. The linear patterns 50 connected to the electrodes 80 and the electrodes 80 and formed on the edges of the first and second transparent conductive films 40 and 20, and one end of which is connected to the touch panel controller 100. Equipped. When a current is supplied to the electrode 80 through the linear pattern 50, the current output from the electrode 80 flows through the first and second transparent conductive films 40 and 20.

As shown in FIG. 3, the principle of the photocatalytic reaction in a capacitive touch panel capable of preventing antibacterial and organic pollution is as follows.

Holes in the valence band (h ⁺ ) react with water to form hydroxyl groups (OH) (H ₂ O + h ⁺ → OH + H ⁺ ), and reduction of oxygen in the air occurs by reduction of the photoexcitation electrons in the conduction band. Superoxide anion (O ₂ ) is produced (O ₂ + e → O ₂ ⁻ ), and these are photocatalytic reactors that react with adsorbed organics as reactive active species.

In addition, the photoorganic superhydrophilicity is due to chemisorption water desorption, i.e., the surface of TiO _{2 in a} steady state is stabilized by crosslinking (crosslinking oxygen) with Ti and Ti, and in this state, the surface shows hydrophobicity. When the surface is irradiated with ultraviolet rays, some cross-linked oxygen is released to form oxygen defects, and the oxygen defects dissociate and adsorb water molecules in the air, thereby producing chemically adsorbed water (surface hydroxyl group), which becomes hydrophilic.

Therefore, the superhydrophilic expression mechanism induced by ultraviolet irradiation on the surface of titanium oxide is a phenomenon caused by the normal photocatalytic reaction causing oxidation-reduction reaction of surface adsorption molecules, and the surface after ultraviolet irradiation is very friendly to oil. Mars has a high lipophilic properties in parallel. That is, the surface of titanium oxide becomes amphiphilic by light (ultraviolet) irradiation.

On the other hand, in the oxidation / decomposition reaction, the oxidation reaction by holes generated by light irradiation is essential. That is, the oxidation-decomposition type reaction and the super hydrophilic type reaction are related to the outer and inner parts. In other words, the surface of the TiO ₂ thin film is hard to be contaminated with dust or foreign matters, and even if contaminated, the foreign matters are smallly decomposed by photocatalytic oxidation and decomposition reactions, and are easily washed by the super hydrophilic properties described above. It can be expected, by applying such a reactor to the over-coating (Over-coating) film of the touch panel is to prevent the antibacterial and organic pollution.

4 is a flowchart illustrating a capacitive touch panel capable of preventing antibacterial and organic pollution according to an embodiment of the present invention.

As shown in FIG. 4, referring to a flow of manufacturing a capacitive touch panel capable of preventing antibacterial and organic pollution, first, step S1 is an etching process, from a distorted signal structurally generated in the touch panel on a glass substrate. In order to correct the linearity, the first and second transparent conductive films are etched. One of the first and second transparent conductive films ITO and ATO is coated on the front and rear surfaces of the glass substrate.

The next step S2 is a shield pattern forming process, in which a shield pattern is formed on the rear surface of the second transparent conductive film by silver paste to reduce noise.

The next step S3 is a linear pattern process, which is formed to form a silver paste on the front surface of the first transparent conductive film to compensate linearly from a distorted signal generated structurally in the touch panel, and is made to the touch panel through power supply. Losing voltage is a constant distribution to ensure linearity. Here, the linear pattern is formed by dry etching the silver paste using a silkscreen method and a laser.

The next step S4 is a drying process, in which drying is performed to remove the solvent component remaining in the linear pattern formed of the silver paste.

Next step S5 is an over-coating film forming process, after the drying process to protect the conductive coating layer of the touch panel and to reduce the noise uniformly spin coating method with a SiO ₂ coating solution on the upper surface of the linear pattern and the surface of the transparent conductive film By coating to form a first overcoating film. After the process, by spin coating with a TiO ₂ solution on the surface of the first overcoating layer to prevent contamination of dust or foreign matters, the _second foreign matters are smallly decomposed by photocatalytic oxidation and decomposition reaction, and can be easily cleaned by washing. An overcoat film may be formed (S5-1).

Next step S6 is a firing process, after the first overcoating film is formed, the coating film is hardened and then fired to mechanically bond the pattern and the glass substrate, and the firing is performed at 500 ° C. to 600 ° C. for 10 min to 30 min. .

The next step S7 is a cell cutting step, in which the cell is cut to a predetermined size according to the use environment after the firing step.

The next step S8 is a bonding process, in which a terminal of a flexible and flat tail is joined by soldering to supply power.

The next step S9 is a linearity test process, in which all products are inspected by measuring the accuracy of the touch panel. The accuracy check is to check whether the value converted into coordinates by sensing the flow of current when the user touches the touch panel.

Next step S10 is an appearance inspection and packaging process, to assemble the touch panel.

The best embodiments have been disclosed in the drawings and specification, and the terminology used herein is for the purpose of describing the invention only and is not intended to be used to limit the scope of the invention as defined in the appended claims or claims. Therefore, those skilled in the art will be capable of various modifications and other equivalent embodiments from this, and therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

As described above, the structure and the manufacturing method of the capacitive touch panel capable of preventing the antibacterial and organic pollution of the present invention has the following effects.

First, the present invention is spin-coated a SiO ₂ solution on the surface of the transparent conductive film and the linear pattern formed of silver paste to secure the linearity from the distorted signal structurally generated in the capacitive touch panel By forming the overcoating layer uniformly, the transparent conductive film of the touch panel can be protected and durability can be ensured.

Second, the present invention spin coating a TiO ₂ solution that causes a photocatalytic reaction on the surface of the linear pattern and the transparent conductive film to form an overcoating film uniformly or as a TiO ₂ solution on the surface of the overcoating film coated with SiO ₂ solution By coating to form a double overcoat film, dust and foreign matters are difficult to be contaminated due to the self-cleaning action by ultraviolet rays, and even if contaminated, the foreign matters are smallly decomposed by photocatalytic oxidation and decomposition reactions.

Third, the present invention can be easily washed by washing by the TiO ₂ -based overcoat film causing the photocatalytic reaction and the sanitary virus can be reduced.

Claims (4)

In the structure of the capacitive touch panel that can prevent antibacterial and organic pollution, A glass substrate on which a linear pattern formed of a silver paste, a shield pattern, and a single or double overcoating layer are formed so as to uniformly distribute voltages generated in the transparent conductive film and the touch panel; A first transparent conductive film formed of ITO or ATO on the front surface of the glass substrate to accurately detect a touch position of an object touched by the touch panel; A second transparent conductive film for shielding noise by forming a back portion of the glass substrate as ITO; A shield pattern formed of silver paste on the rear surface of the second transparent conductive film to reduce noise; Formed with silver paste on the front surface of the first transparent conductive film to form a linearity correction from the distorted signal structurally generated in the touch panel, by linearly distributing the voltage generated in the touch panel through power supply A linearity pattern to secure; A first overcoat layer uniformly spin-coated with SiO ₂ -based coating solution on the upper surface of the linear pattern and the surface of the first transparent conductive layer to protect the conductive coating layer of the touch panel and reduce noise; A second overcoating film which is coated with a TiO ₂ solution on the surface of the first overcoating film to prevent dirt or foreign matters from being contaminated and the foreign matters are smallly decomposed by a photocatalytic oxidation and decomposition reaction and can be easily washed by cleaning; Capacitive touch panel structure capable of preventing antibacterial and organic pollution, characterized in that consisting of. The method of claim 1, The surface of the second overcoating layer coated with the TiO ₂ solution is difficult to be contaminated with dust or foreign matters due to the self-cleaning action by ultraviolet rays, and even if contaminated, the foreign matters are smallly decomposed by photocatalytic oxidation and decomposition reactions. Capacitive touch panel structure capable of preventing antibacterial and organic pollution, which is easily washed by hydrophilic characteristics. In the manufacturing method of the capacitive touch panel capable of antibacterial and organic pollution, Etching the first and second transparent conductive films on the glass substrate to linearly correct from the distorted signal structurally generated in the touch panel; Forming first and second transparent conductive films coated with one of ITO and ATO, which are first and second transparent conductive films, on the front and rear surfaces of the glass substrate; Forming a shield pattern on the rear surface of the second transparent conductive film by using a silver paste to reduce noise; A linear pattern process formed of silver paste to correct linearly from the distorted signal structurally generated in the touch panel at the front surface of the first transparent conductive film; Drying to remove the solvent component remaining in the linear pattern formed of the silver paste; After the drying process, in order to protect the conductive coating layer of the touch panel and reduce noise, the first overcoating layer is formed by uniformly coating with a SiO ₂ coating solution on the upper surface of the linear pattern and the surface of the transparent conductive film by SiO ₂ coating solution. Process; Forming a first overcoating layer and then firing the coating layer to mechanically bond the pattern to the glass substrate; Cutting the cell to a predetermined size according to the use environment after the firing step; A bonding process for supplying power by soldering a terminal of the flexible and flat tail to the electrode by soldering; A linearity test process of inspecting reliability of the touch panel; Appearance inspection and packaging process for assembling the touch panel; Method of manufacturing a capacitive touch panel capable of preventing antibacterial and organic pollution, characterized in that it comprises a. The method of claim 3, wherein Spin coating with a TiO ₂ solution on the surface of the first overcoating layer to prevent dirt or foreign substances from contamination, and to form a second overcoating layer so that foreign matters are smallly decomposed by photocatalytic oxidation and decomposition reactions and can be easily washed by cleaning. Process of doing; Method of manufacturing a capacitive touch panel capable of preventing antibacterial and organic pollution, characterized in that it further comprises.

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