KR101082783B1 - Touch panel with both elevation of view trait and slim state - Google Patents

Touch panel with both elevation of view trait and slim state Download PDF

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Publication number
KR101082783B1
KR101082783B1 KR1020100138716A KR20100138716A KR101082783B1 KR 101082783 B1 KR101082783 B1 KR 101082783B1 KR 1020100138716 A KR1020100138716 A KR 1020100138716A KR 20100138716 A KR20100138716 A KR 20100138716A KR 101082783 B1 KR101082783 B1 KR 101082783B1
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KR
South Korea
Prior art keywords
substrate
glass
touch panel
oxide layer
layer
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KR1020100138716A
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Korean (ko)
Inventor
김경환
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(주)리지스
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B32B2457/208—Touch screens
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices

Abstract

The present invention relates to a touch panel that combines visibility and slimness.
The constitution WHEREIN: The board | substrate 10 which mainly uses either glass, PC (polycarbonate), or PMMA (polymethacryl); And a silicon oxide layer 25 and an indium tin oxide layer 30 on one surface of the substrate 10.
Accordingly, while responding to the trend of light weight / slim, there is an effect that can be applied to a variety of products by ensuring visibility.

Description

Touch panel with both elevation and slimness {Touch panel with both elevation of view trait and slim state}

The present invention relates to a touch panel using a substrate such as glass, PC (polycarbonate), PMMA (polymethylmethylacryl), and more specifically, to meet the trend of light weight / slimming, while ensuring visibility and application to various products The present invention relates to a touch panel that combines improved visibility and slimness.

In general, the touch panel is classified into a resistive film type, a capacitive type, an ultrasonic type, an acoustic wave type, an infrared type, and the like, and the resistive type and the capacitive type are mainly used.

The resistive type is widely used in TVs, monitors, notebook PCs, car navigation systems, gaming devices, white appliances, PDAs, electronic dictionaries, mobile phones and camcorders due to its high reliability and stability. However, since the conductive material is coated on the glass or the film coated with the conductive material is laminated structure, the outdoor visibility is poor due to the diffuse reflection phenomenon by the air gap between the upper and lower plates, the surface flexibility when using glass Lack of barriers to the proliferation of applications.

As such, the maintenance of quality and productivity consistent with the use of the product is recognized as an important factor in determining the marketability in the future, and there is a need to introduce glass (glass) due to the diversification of the applied product, but there are practical difficulties.

According to Korean Patent Publication No. 0681157, "The structure of the capacitive touch panel and its manufacturing method", "A glass substrate formed with a linear pattern, a shield pattern and an overcoating film formed of silver paste; A transparent conductive film formed of ITO or ATO on the front surface of the glass substrate so as to accurately detect a touch position of a material touched by the touch panel; A transparent conductive film for shielding noise by forming a back portion of the glass substrate with ITO; A shield pattern formed of silver paste on the rear surface of the transparent conductive film to reduce noise; A linear pattern formed by using a silver paste on the front surface of the transparent conductive film to correct linearly from a distorted signal structurally generated in the touch panel, and uniformly distributing a voltage generated in the touch panel to ensure linearity; An overcoat layer uniformly spin-coated with SiO 2 -based coating solution on the upper surface of the linear pattern and the transparent conductive layer to protect the conductive coating layer of the touch panel and reduce noise; A flexible and flat tail connected by soldering a terminal of a tail to an electrode for supplying power to the linear pattern; It consists of.

Korean Patent Publication No. 908225 discloses `` a lower insulator layer, a lower transparent conductive oxide layer formed in a touch pattern on an upper surface of the lower insulator layer, and drawing out an electrical signal from the lower transparent conductive oxide layer to the edge of the lower insulator layer. A lower pad made of a lower metal deposition coating layer formed in a connection pattern for forming the lower pad; (Omitted) proposes a double layer structure of the transparent conductive oxide film layer and the metal deposition coating layer for all the connection patterns for the electrical signal extraction. This reveals that it is possible to manufacture a material with a lower cost and a simpler process than a process in which silver paste is applied as a connection pattern for drawing out from the ITO layer to the outside.

However, according to the above-mentioned prior arts, although mass productivity and durability can be improved to some extent, when applied to a resistive-type glass substrate, there is a limitation in exhibiting high refractive index, and thus there is a difficulty in applying to various products. There was a side that failed to meet the slimming trend.

Accordingly, an object of the present invention is to provide a touch panel having both improved visibility and slimness, which can be applied to various products by securing visibility while meeting the trend of light weight / slim.

In order to achieve the above object, the present invention provides a touch panel; A substrate based on one of glass, PC (polycarbonate), and PMMA (polymethacryl) and an indium tin oxide (ITO) layer are formed on one surface of the substrate.

According to the present invention, the glass substrate is selected from soda lime glass or Gorilla glass and provided with a chemical strengthening layer, the chemical strengthening layer is immersed in about 2 to 8 hours in potassium nitrate solution of about 400 ~ 500 ℃ It is characterized in that the formed, the resin substrate, such as PC (polycarbonate), PMMA (polymethylmethyl acrylic) is characterized in that the acrylic resin-based hard coating layer is formed.

On the other hand, the terms or words used in the present specification and claims are not to be construed as limiting the ordinary or dictionary meanings, the inventors should use the concept of the term in order to explain the invention in the best way. It should be interpreted as meanings and concepts corresponding to the technical idea of the present invention based on the principle that it can be properly defined. Therefore, the embodiments described in the present specification and the configuration shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all of the technical ideas of the present invention, and various alternatives may be substituted at the time of the present application. It should be understood that there may be equivalents and variations.

As described in the above configuration and operation, the laminated structure of the touch panel according to the present invention is applicable to a variety of products by ensuring visibility while meeting the trend of light weight / slim in applying a substrate to a resistive touch panel There is one effect.

1 is a configuration diagram showing the main structure of the touch panel according to the present invention in a stacked state,
FIG. 2 is a configuration diagram showing the structure of FIG. 1 in a cross-sectional state. FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a touch panel, and more particularly, to a method of forming a silicon oxide layer (SiO 2) and an indium tin oxide (ITO) layer on a substrate by vapor deposition. For example, in the case of the resistive film method, a conductive layer having a connector, a dot spacer, and a conductive wire is formed after the structure of the present invention in which a silicon oxide layer (SiO 2) and an indium tin oxide layer (ITO) are formed by evaporation on a substrate 10. And then finally the process of bonding the film may be selected. As another example, a stacked structure different from the above may be selected in a state in which a silicon oxide layer (SiO 2) and an indium tin oxide layer (ITO) are formed on the substrate 10 by vapor deposition. Either way, better visibility improves the applicability to various products.

Prior to reviewing a schematic process sequence of the present invention, for convenience of explanation, the cell glass substrate among the substrates 10, such as glass, PC (polycarbonate), and PMMA (polymethylmethylacryl), will first be described. Let's explain.

In view of the schematic process sequence of the present invention, a preparation step of loading the cell glass substrate 10 before cleaning, a cleaning step of introducing the cell glass into the cleaner, a step of loading the cell glass into the carrier, and a cell glass Entering the vacuum chamber, coating the ITO by a DC power supply control method, and surface treatment of the cell glass with an ion beam to reduce the change in resistance over time through the stabilization of the ITO thin film.

According to the present invention, a substrate 10 based on glass, PC (polycarbonate), PMMA (polymethylmethylacryl), or the like is used, and the substrate 10 must be improved in physical properties through a predetermined pretreatment. Typically, the improvement in physical properties is selected from physical, thermal and chemical methods.

At this time, in the case of the glass substrate 10 is selected from soda lime glass or ring glass, and provided with a chemical strengthening layer (20). Soda-lime glass and goira glass is suitable because it has the properties required for display products, but is not limited thereto, it is possible to apply a substrate 10 of various glass materials. Since the cracking of the glass is caused by fine cracking and frictional force, it can be improved by surface hardening by heat treatment or chemical treatment. In the case of heat treatment, stress improvement occurs temporarily at the temperature gradient above the melting point, and the glass should be a simple plane and a certain thickness or more. On the other hand, the chemically strengthened layer 20 by the chemical method may implement high strength regardless of the shape or thickness of the glass.

The chemically strengthened layer 20 is characterized in that it is formed by immersing in about 2 to 8 hours in potassium nitrate solution of about 400 ~ 500 ℃. Chemical strengthening is by ion exchange and is carried out at temperatures below the melting point of the glass. When glass is immersed in potassium nitrate solution at 400 ~ 500 ℃ for 2 ~ 8 hours, Na ions on the glass surface and K ions of the solution are interchanged, and strengthening occurs due to shrinkage caused by electromagnetic force. The preferred temperature of the chemically strengthened layer 20 and the immersion time of the potassium nitrate solution vary depending on the function of the touch panel. For example, the temperature of the chemically strengthened layer 20 is 420 ° C., and the potassium nitrate solution is heated for about 3 hours. Although it may be immersed, the temperature may be set to 450 ° C. and immersed in potassium nitrate solution for 4 to 5 hours, which may be a result of treating the strength of the chemically strengthened layer 20 according to the characteristics of the touch panel. . The substrate 10 having such a chemically strengthened layer 20 exhibits about 8 times higher strength than that by heat treatment, less distortion of distortion, etc. during processing, and maintains color and light transmittance characteristics.

In the case of the substrate 10 such as PC (polycarbonate) and PMMA (polymethacryl), an acrylic resin-based hard coating layer 20a is formed on one surface of the substrate 10 to form a silicon oxide layer (SiO 2), which will be described later. The affinity of is strengthened.

Meanwhile, according to the present invention, the silicon oxide layer 25 and the indium tin oxide layer 30 are sequentially deposited on one surface of the substrate 10, and this deposition process will be described in more detail.

The silicon oxide layer 25 and the indium tin oxide layer 30 contain a substrate 10 selected from the above materials, such as glass, PC, PMMA, etc. in a vacuum chamber and sputtering in a predetermined gas atmosphere. Formed through).

First, the import inspection and material quantity of the cell glass material are checked and loaded into the cassette. Approximately 62 can be loaded in a row (more and less), and the first and last spaces are empty to prevent mishandling. When loading of 60 sheets of 3 rows of cleaning cassettes is completed, check the appearance as a whole. Move to the washing machine's waiting place and load it on the loading stand shelf. Of course, before or immediately after this process, the chemical glass should be used to form the cell glass to form the chemical strengthening layer (20).

Next, the loaded cell glass material is put in a washing machine to perform a washing operation. At this time, it is appropriate that the cleaning temperature is about 60 ℃ and the cleaning time is about 45 minutes. These values can be adjusted according to other conditions of the cell glass material used.

Next, the cell glass material having been cleaned is loaded into a carrier to enter the vacuum chamber. When loading, the quantity to be put in to keep in the coating effective range zone is limited.

Next, the cell glass material is put into a vacuum chamber. At this time, the vacuum chamber atmosphere temperature is set to a suitable temperature of about 250 ℃ ± 50 or a suitable temperature of about 340 ℃. Thereafter, plasma sputtering is performed by a magnetron sputtering method. Magnetron sputtering focuses near the target using a permanent magnet attached to the target, which can generate plasma between the target and the shield or the target and the substrate due to bias voltages (DC, RF) applied to the target. Ions accelerated by the potential difference between the target surface and the plasma collide with the target surface to cause secondary electron emission, sputtering at the target surface and sputtered neutral atoms fly to the substrate to form a thin film. do.

Next, the silicon oxide layer 25 is formed by performing SiO 2 coating by argon (Ar) plasma. At this time, the thickness of the coated film is preferably maintained at about 250Å. Instead of the silicon oxide layer 25, a low refractive material such as aluminum oxide (Al 2 O 3) or silicon oxide (SiNx) may be used for deposition. On the other hand, in the SiO 2 coating method, it is preferable to use four cathodes as a method of controlling RF power. The number and positions of the cathodes may vary depending on the structure of the vacuum chamber, and the cathodes optimized for the present invention select four that maintain a constant equal spacing at positions opposite to the cell glass material. When the number of cathodes is small, there is a possibility that the thin film formation is insufficient, and when too large, uniform control of thickness is difficult. Thereby, the transmittance | permeability by coating can be improved to 90% or more. Subsequently, plasma treatment is performed to improve the film strength of SiO 2 deposited at room temperature. In addition to the above SiO 2 coating method, magnesium chloride (MGF 2 ) is dissolved in an E-beam (electron beam) and deposited, but a SiO 2 coating method is more preferable.

Next, the indium tin oxide layer 30 is formed by coating ITO on a coated glass cell of SiO 2 with a thickness of 120 ± 50 μs by a DC power control method. During ITO coating, the uniformity of resistance of ITO film formation is kept within 5% by the pressure control of argon and oxygen gas. This control method can use a conventional apparatus. A dedicated device is used to precisely control the conditions of the atmosphere.

Next, the surface treatment with an ion beam can be achieved to reduce the resistance change over time through the stabilization of the ITO thin film.

On the other hand, both the glass substrate 10 and the PC 10 (polycarbonate) and PMMA (polymethylmethylacrylic) -based substrates 10 set the temperature of the vacuum chamber to around 250 ° C. ± 50 to form an indium tin oxide layer (ITO; Indium Tin). When the oxide (30) is deposited, the resistance is also about 400 ~ 500Ω can be manufactured in a form that can be used safely. However, in the case of the glass substrate 10 rather than the PC and PMMA series substrate 10, when the indium tin oxide layer (ITO layer) 30 is deposited by setting the temperature of the vacuum chamber to around 340 ° C, which is generally performed, the resistance value is reduced. It may be reduced to about 80 ~ 300 Ω, and there is no obstacle to the stabilization / crystallization of the material of the indium tin oxide layer 30 has the advantage that can meet the various needs of consumers. On the other hand, in the case of adopting PC (polycarbonate) or PMMA (polymethacryl) series substrate 10, it is preferable to perform the operation by setting the temperature of the vacuum chamber to a temperature of about 250 ° C ± 50. This is because in the case of the PC or PMMA substrate 10, if the indium tin oxide layer 30 is deposited by setting the temperature of the vacuum chamber to around 340 ° C, the substrate 10 of the PC or PMMA may be burned. Because. However, even after the temperature of the vacuum chamber is set to about 340 ° C., even if the indium tin oxide layer 30 is deposited on the PC or PMMA substrate 10, the substrate 10 of the PC or PMMA has a resistance of about 80 to 300 kW. Although it is possible to prevent the burning, there is a risk of deterioration of productivity and defective products, so that the temperature of the vacuum chamber may be set to around 250 ° C. to manufacture touch panels having various resistance values required by consumers. In addition, in order to reduce the resistance of 400 to 500 kW generated by the PC 10 or the PMMA substrate 10 that is vacuum deposited at a temperature of about 250 ° C. ± 50 to around 80 to 300 kW, indium tin oxide is contained in a vacuum chamber of 180 ° C. to 500 ° C. If the touch panel with all laminated layers is re-injected and passed again for about 10 to 50 minutes, the resistance value of the indium tin oxide layer 30 falls to about 80 to 300Ω and can meet various consumer's needs. Can produce a touch panel.

delete

The touch panel of the cell glass material (or PC and PMMA substrate material) thus prepared is detached from the carrier and then inspected for appearance and characteristics. Appearance inspection is to visually inspect scratches, foreign substances, contamination, pinholes, etc. on the surface, and property inspection is to measure electrical resistance, transmittance, film thickness, heat resistance, and wear resistance.

Generally, when only the indium tin oxide layer 30 is laminated on the substrate 10 having a transmittance of about 91%, the transmittance decreases slightly, but when the silicon oxide layer 25 and the indium tin oxide layer 30 are laminated, about 91% It is recovered to transmittance of, and also has the usefulness that the manufacturing process is simple and manufacturing cost is low.

It is apparent to those skilled in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, such modifications or variations will have to belong to the claims of the present invention.

10: substrate 20: chemically strengthened layer
20a: hard coat layer 25: silicon oxide layer
30: indium tin oxide layer

Claims (3)

In the touch panel:
A substrate 10 based on one of glass, PC (polycarbonate), and PMMA (polymethacryl); And depositing a silicon oxide layer 25 and an indium tin oxide layer 30 on one surface of the substrate 10, wherein the glass substrate 10 is selected from soda-lime glass or cyclic glass, and on one surface of the substrate 10. The chemical strengthening layer 20 is provided, but the chemical strengthening layer 20 is a touch panel having both improved visibility and slimming, characterized in that formed by immersion in a potassium nitrate solution of 400 ~ 500 ℃ for 2 to 8 hours. delete The method of claim 1,
The substrate 10 of the PC or PMMA includes a hard coating layer 20a on one surface thereof, and a silicon oxide layer 25 and an indium tin oxide layer 30 are deposited on the upper surface thereof. Combined touch panel.
KR1020100138716A 2010-12-30 2010-12-30 Touch panel with both elevation of view trait and slim state KR101082783B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101248783B1 (en) 2012-04-23 2013-04-03 (주)리지스 Touch panel with both view trait and slim state

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101248783B1 (en) 2012-04-23 2013-04-03 (주)리지스 Touch panel with both view trait and slim state

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