KR101723528B1 - manufacturing method of touch screen pannel window cover - Google Patents

Abstract

The present invention relates to a method of manufacturing a window cover for a touch screen panel, the method comprising the steps of: preparing a disc glass; first chemical strengthening the disc glass; Forming a metal printing layer on a side of a reinforced disk glass having a pattern satisfying non-conductive conditions for forming a bezel portion of the touch screen panel on a cell unit basis or forming a ceramic ink printing layer on a cell unit basis; Forming a window cover glass substrate on a cell unit by cutting the disk glass on which the metal printing layer or the ceramic ink printing layer is formed by a cell unit; and chemically strengthening the window cover glass substrate cut by the cell unit An additional printing for reinforcing the metal printing layer or the ceramic ink printing layer on the secondary chemically reinforced window cover glass substrate, The method comprising the steps of: (a) forming a metal layer on a substrate; Thus, by embodying the bezel portion of the touch screen panel with metal or ceramic ink satisfying the non-conducting condition, the bezel portion is formed in the disc glass state, and then, even if the secondary chemical strengthening is performed, Which is advantageous in improving productivity and yield.

Description

Technical Field [0001] The present invention relates to a manufacturing method of a touch screen panel,

The present invention relates to a method for manufacturing a window cover of a touch screen panel, wherein a bezel portion of the touch screen panel is formed of a metal or ceramic ink satisfying non-conductive conditions, The present invention relates to a method of manufacturing a window cover of a touch screen panel, which can improve the productivity and yield by enabling the process of a single plate without damaging the bezel.

2. Description of the Related Art Generally, a touch screen panel includes a cathode ray tube (CRT), a liquid crystal display (LCD), a field emission display (FED), a plasma display panel Panel (PDP) and an electroluminescence device (ELD).

The touch sensor used in such a touch screen panel is divided into a resistive film type and a capacitive type, and has a high reliability, excellent durability, excellent performance, fast response speed, and multi-touch capability. .

Capacitive touch sensors, which are now widely applied, are manufactured by the following manufacturing process.

A transparent conductive film (ITO or ZnO) is deposited on a flexible substrate such as glass or PET, and is patterned to form a transparent electrode pattern. Then, a circuit wiring for electrically connecting the transparent electrode pattern is formed.

 Then, an adhesive for adhesion to the window cover glass substrate is applied to the upper side of the touch sensor, and the touch sensor and the window cover glass substrate are bonded to each other to complete the touch screen panel.

Here, a bezel layer for decoration is formed on one surface of the window cover glass substrate while hiding the opaque circuit wiring of the touch sensor.

However, in the above method, the manufacture of the touch sensor and the window cover glass substrate is separately performed, and each process is performed in units of cells, resulting in a problem of low productivity due to a long process line and time. In addition, a plurality of electrode layers, adhesive layers, and the like are formed on the substrate to increase the thickness of the touch sensor, resulting in deterioration of touch sensitivity and low light transmittance.

Accordingly, recently, in order to solve such a problem, a method of manufacturing a window-integrated capacitive touch sensor module (Registration No. 10-1288806) filed by the present applicant has been proposed.

The present invention relates to a disk unit process in which a window cover glass substrate as a disk glass is chemically reinforced and a transparent electrode layer is integrally formed on a reinforced window cover glass substrate, followed by cutting and chamfering.

Generally, in the disk unit process, the upper and lower surfaces of the disk glass are maintained in the reinforced state during the cutting and chamfering process of the disk glass. However, since the side surface is not reinforced after the cutting, the impact strength is lowered. It is becoming a problem.

In order to solve this problem, secondary strengthening for side reinforcement or side strengthening and secondary reinforcement is carried out.

After the secondary chemical strengthening, the bezel layer is formed at the edge of the touch sensor. The bezel layer is mainly formed on the rim except for the transparent window region in the touch sensor. The bezel layer prints a trademark or logo of a manufacturer such as a mobile phone, or functions to hide opaque circuit wiring of a touch sensor frame. Such a bezel layer has been formed by printing with a method such as a silk screen or by deposition of a non-conductive material or the like.

However, in this method, a touch sensor is formed for each product unit on a disc glass, and a disc glass is cut and sieved in a cell unit to obtain a window glass cover for each cell unit, and then a side reinforcement Since the bezel layer is formed on a cell-by-cell basis, the bezel-layer forming process is performed on a cell-by-cell basis, similar to the disadvantages of the above- This is a low problem.

On the other hand, if the bezel layer is formed on the edge of the touch panel after the touch sensor is formed in the disc glass state without forming the bezel layer on a cell-by-cell basis, and the secondary glass reinforcement is performed after cutting and chamfering the disc glass, .

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a touch screen panel in which a bezel portion is realized by metal or ceramic ink satisfying non- And it is an object of the present invention to provide a method of manufacturing a window cover of a touch screen panel which improves mass productivity and yield by enabling a disk unit process without damaging the parts.

According to an aspect of the present invention, there is provided a method of manufacturing a window cover for a touch screen panel, the method comprising: preparing a disc glass; first chemical strengthening the disc glass; Forming a metal print layer having a pattern satisfying non-conductive conditions for forming a bezel portion of the touch screen panel on a cell unit basis or forming a ceramic ink print layer on a cell basis, Forming a window cover glass substrate in a cell unit by cutting the glass plate having the ceramic ink print layer formed thereon in a cell unit; secondly chemically strengthening the window cover glass substrate cut in the cell unit; An additional printing process is carried out to reinforce the metal printing layer or the ceramic ink printing layer on the reinforced window cover glass substrate The method of manufacturing a window cover of a touch screen panel according to claim 1,

The first chemical strengthening of the disc glass is preferably set to a tempering temperature and a tempering time according to the thickness of the disc glass so that the center tension of the disc glass is 20 to 50 MPa.

It is preferable that the metal printing layer has an intermittent line or dot pattern. The distance between the lines or dots is 1 to 20 占 퐉. When 1000 V is applied, It is preferable to satisfy it.

The metal printing layer may be formed on a cell unit basis by lamination of a photoresist coating or a dry film resist (DFR) on one side of the primary chemically strengthened disc glass, patterning the photoresist or DFR to form a cell unit Forming a resist pattern for forming a pattern of the metal printing layer, depositing a metal on the photoresist or the DFR on which the resist pattern is formed, removing the resist pattern, And a step of forming a film on the substrate.

The metal printing layer may be selected from Au, Ag, Al, W, Cr, Rh, and Mo depending on the color of the bezel.

On the other hand, the formation of the ceramic ink printing layer on a cell-by-cell basis includes: laminating photoresist coating or DFR (Dry Film Resist) on one side of the primary chemically reinforced disc glass; patterning the photoresist or DFR A step of forming a resist pattern for forming a bezel in a unit of a resist pattern or a DFR on which a resist pattern is formed, applying a ceramic ink on the photoresist or the DFR on which the resist pattern is formed and removing the resist pattern to form a ceramic ink print layer Drying the ceramic ink printing layer, and firing the dried ceramic ink printing layer.

In addition, it is preferable that the ceramic ink printing layer uses ink containing any one or two or more of glass frit, pigment and metal particles.

It is preferable that the window cover glass substrate in the cell unit is formed by masking the protective film on the disk glass, and after laser cutting, the protective film is peeled off.

In addition, it is preferable to remove the micro cracks of the side portion formed by the laser cutting through the chemical etching or polishing process on the side portion of the window cover glass substrate of the cell unit before peeling the protective film.

Further, the secondary chemical strengthening can be carried out by any one of a dipping method using potassium nitrate (KNO ₃ ), a paste method using a solution containing potassium nitrate and zinc oxide, and a spraying method using potassium nitrate and alcohol solution It is preferable to chemically strengthen the side surface of the window-cover glass substrate in the cell unit or chemically strengthen the front surface and the side surface.

Preferably, the additional printing step is performed by IR printing or logo printing at the same time as reinforcing printing for reinforcing the color of the metal printing layer or the ceramic ink printing layer.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a touch screen panel in which a bezel portion is realized by metal or ceramic ink satisfying non- It is possible to perform a disk unit process without damaging the parts, thereby improving the productivity and yield.

Further, by performing secondary chemical strengthening after the formation of the bezel portion, it is possible to strengthen not only the front surface but also the side surface of the window cover glass substrate, thereby improving the strength of the window cover glass substrate and improving the durability of the touch screen panel, An additional printing process is provided to improve the decorative property and aesthetics of the bezel portion.

1 is a block diagram of a method of manufacturing a window cover of a touch screen panel according to the present invention;
2 is a block diagram of a method of manufacturing a window cover of a touch screen panel according to the present invention, wherein a metal print layer is formed with a bezel portion.
3 is a block diagram of a method for manufacturing a window cover of a touch screen panel according to the present invention, in which a ceramic ink print layer is formed on a bezel.

The present invention relates to a method for manufacturing a window cover of a touch screen panel, wherein a bezel portion of the touch screen panel is formed of a metal or ceramic ink satisfying non-conductive conditions, It is intended to improve the mass productivity and the yield by enabling the unit process of the disk without damaging the bezel part.

Further, by performing secondary chemical strengthening after the formation of the bezel portion, it is possible to strengthen not only the front surface but also the side surface of the window cover glass substrate, thereby improving the strength of the window cover glass substrate and improving the durability of the touch screen panel, An additional printing process is performed to improve the decorative property and aesthetics of the bezel portion.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a block diagram of a method for manufacturing a window cover of a touch screen panel according to the present invention. FIG. 2 is a cross-sectional view illustrating a method of manufacturing a window cover of a touch screen panel according to an embodiment of the present invention. FIG. 3 is a block diagram of a method of manufacturing a window cover of a touch screen panel according to the present invention, in which a ceramic ink print layer is formed by a bead portion.

As shown in the drawings, the present invention provides a method of manufacturing a window cover for a touch screen panel, comprising the steps of preparing a disc glass, first chemical strengthening the disc glass, Forming a metal printed layer having a pattern satisfying non-conductive conditions for forming a bezel portion of a touch screen panel on a cell unit basis or forming a ceramic ink print layer on a cell unit basis, the metal print layer or the ceramic ink print layer Forming a window cover glass substrate in a cell unit by cutting the formed disc glass in a cell unit, second chemical strengthening the window cover glass substrate cut in the cell unit, and forming a second chemically strengthened window cover glass substrate And the additional printing process for reinforcing the metal printing layer or the ceramic ink printing layer is performed.

A disc glass according to the present invention is prepared. The disc glass is inspected for scratches and foreign substances, and both sides of the disc glass are polished and cleaned to improve surface precision and transparency.

Here, the disc glass is prepared by either a transparent soda lime glass or an alumino silicate glass.

When the preparation of the disc glass is completed, the disc glass is primarily strengthened. The general glass chemical strengthening method is used. Preferably, the tempering temperature and the strengthening time are set according to the thickness of the disc glass, . This primary chemical strengthening is primarily to chemically strengthen the entire surface of the disc glass.

Specifically, the strengthening temperature and the strengthening time are set according to the thickness of the disc glass so that the center tension of the disc glass becomes 20 to 50 MPa. The tempering time and the strengthening time are set by using potassium nitrate (KNO ₃ ) Lt; RTI ID = 0.0 > temperature.

When chemical strengthening is completed at high temperature, it is slowly cooled for 0.5 to 5 hours to prevent cracking of the surface due to thermal shock, and the reinforcing depth is about 5 to 20 μm.

Table 1 shows the results of setting the tempering temperature and the tempering time according to the thickness of the disc glass (aluminosilicate) in one embodiment of the present invention, and accordingly, the compressive stress (MPa) (Depth of Layer, 占 퐉), and Central Tension (MPa).

Strengthening conditions (based on 99.5% KNO ₃ ) Strengthen results Disc glass
Thickness (mm) Tempering temperature (℃) Hardening time (Hr) Compressive Stress (MPa) Depth of Layer
(탆) Central Tension (MPa) 0.15 400 0.3 750 8 45 0.2 400 0.4 750 10 42 0.3 400 0.5 750 13 36 0.4 400 0.6 750 15 30 0.55 400 0.7 750 17 25 0.7 400 0.8 750 19 22

The strengthening condition is for facilitating laser processing in the step of forming a window cover glass substrate by cutting a disc glass to be described later on a cell unit basis, and is characterized in that the central tension of the disc glass is 20 to 50 MPa ( The thickness of the disk glass is 0.15 to 1.7 mm), the compressive stress (compressive stress) is 750 MPa, and the depth of the layer is 8 to 19 μm.

As shown in Table 1, the center tensile force is inversely proportional to the thickness of the disk glass. Therefore, when the disk glass becomes thinner, the chemical strengthening time is reduced and adjusted to the reference center tensile force.

Then, when the first chemical strengthening of the disc glass is completed, a metal printing layer having a pattern satisfying non-conducting conditions for forming a bezel portion of the touch screen panel is formed on one side of the first chemically strengthened disc glass, Or the ceramic ink printed layer is formed on a cell-by-cell basis.

As described above, in the present invention, since the formation of the bezel portion is performed on a cell-by-cell basis in the form of a disk glass, mass production and yield can be improved.

The bezel is mainly formed on a rim of the touch screen panel excluding a transparent window area. The bezel is used to print a trademark or a logo of a manufacturer of a mobile phone or to cover opaque circuit wiring of a touch screen panel frame.

Such a bezel portion is mainly used for black or white depending on the color of the matrix or a color similar to or similar to the color of the matrix is used and a method such as screen printing, .

Since the bezel part must satisfy the non-conduction condition with the touch sensor area, the antenna, and the accessory such as the touch pen, the bezel part usually includes photosensitive resin, pigment, etc. In the present invention, the bezel part is made of metal or ceramic ink If metal is used, the above non-conduction conditions shall be satisfied. A bezel portion formed using a metal is called a metal printing layer, and a bezel portion formed using a ceramic ink is called a ceramic ink printing layer.

As described above, according to the present invention, by forming the bezel portion using metal or ceramic ink, it is possible to form a plurality of bezel portions in a cell unit in a state of a disk, and after cutting the disk glass into cell units, There is no damage, so there is an advantage of improving the efficiency of the process and improving the durability of the product, the decorative property and the aesthetics of the bezel portion.

 In order for the metal print layer to satisfy the non-conduction condition, the metal print layer may be formed so as to have a pattern satisfying the non-conduction condition, specifically, an intermittent line form such as "----" each having a dot-like pattern, are formed on a cell-by-cell basis to form a bezel portion in a disc glass state.

That is, although the metal printing layer has a metallic bezel as a whole, it has a pattern of intermittent line or dot pattern, so that it is finely formed to satisfy electrically non-conductive conditions.

In order to satisfy such a non-conduction condition, it is preferable that the line or the dot pattern is formed so as to have an interval, and the distance between the lines or dots is 1 to 20 mu m so as to satisfy the non- .

As described above, the metal printing layer for forming the bezel in the present invention is preferably formed on the disc glass in a unit of a cell, and may be an intermittent line-shaped or dot-shaped pattern having a predetermined interval to satisfy the non- .

As shown in FIG. 2, the metal printing layer may be formed on a cell basis by laminating photoresist coating or DFR (Dry Film Resist) on one side of the primary chemically reinforced disc glass, Forming a resist pattern for forming a pattern of the metal print layer, depositing a metal on the photoresist or the DFR on which the resist pattern is formed, and removing the resist pattern . ≪ / RTI >

The deposition of the metal is performed by sputtering or an e-beam process, and one of Au, Ag, Al, W, Cr, Rh, and Mo is selected according to the color of the bezel portion of the display device use.

Thus, since the metal has high conductivity, the patterning (intermittent line or dot pattern) and the deposition of the metal, the resist pattern made of the photoresist or the DFR are removed by the photolithography process, and a pattern satisfying the non- Thereby producing a metal print layer.

3, the formation of the ceramic ink printing layer in a unit of a cell is performed by using the first chemically strengthened ink layer, A photoresist coating or a DFR (Dry Film Resist) is laminated on one surface of a disk glass, and a photoresist or a DFR is patterned to form a resist pattern for forming a bezel in units of cells. A ceramic ink printing layer is formed by removing the resist pattern, and then the ceramic ink printing layer is dried, and the dried ceramic ink printing layer is baked to form the ceramic ink printing layer.

The ceramic ink printing layer is formed by an ink-jet coating process, and uses ink containing any one or two or more of glass frit, pigment and metal particles.

As described above, the ceramic ink printing layer is formed by performing patterning (line or dot pattern) on a cell-by-cell basis by a photolithography process, applying a ceramic ink, removing a resist pattern made of a photoresist or DFR.

The ceramic ink printing layer formed on a cell basis is dried by using infrared rays at a temperature of 100 to 200 ° C for 0.5 to 5 minutes and then baked at a temperature of 600 to 800 ° C for 5 to 15 minutes to be manufactured do.

Next, the glass plate on which the metal printing layer or the ceramic ink printing layer is formed is cut in a cell unit to form a window cover glass substrate in a cell unit. That is, the metal printing layer or the ceramic ink printing layer patterned in units of a cell is cut according to a cell unit pattern to form a window cover glass substrate in a cell unit.

Here, the cutting of the disk glass in the unit of a cell is performed by masking the protective film on the disk glass, cutting the laser, and peeling the protective film.

The protective film is masked to prevent scratches and surface defects that occur during cutting, and is masked on a disk glass using a dry film or a UV paste excellent in acid resistance. Then, a laser beam is used to cut the disk glass Cut.

The laser for cutting the reinforced disk glass so that the central tension is 20 to 50 MPa in the primary chemical strengthening step uses a Pico second wavelength and is cut by a filamentation method .

The laser beam is cut at a frequency of 2 to 10 kHz, a burst of 2 to 5 times, a beam speed of 30 to 150 mm / sec, and a laser beam cutting distance of about 50 to 200 μm from the protective film edge. After the laser cutting is completed, the protective film is peeled off.

Meanwhile, before peeling the protective film, the side surface of the window cover glass substrate of the cell unit may be subjected to a chemical etching or polishing process to remove micro cracks in the side surface formed by the laser cutting, The etching amount and the processing amount are processed to 50 to 200 탆.

Then, the window cover glass substrate cut in the cell unit is chemically strengthened secondarily. The secondary chemical strengthening is to chemically reinforce the side of the window cover glass substrate or chemically strengthen the front and side surfaces.

The front surface is once again chemically reinforced and the side is not reinforced. It is formed by laser cutting and is reinforced by secondary chemical strengthening to strengthen the window cover glass substrate as well as the front surface of the window cover glass substrate Thereby improving durability.

Further, the secondary chemical strengthening can be carried out by any one of a dipping method using potassium nitrate (KNO ₃ ), a paste method using a solution containing potassium nitrate and zinc oxide, and a spraying method using potassium nitrate and alcohol solution To chemically reinforce the side of the window-cover glass substrate in the cell unit or chemically strengthen the front and side surfaces.

As described above, the present invention can strengthen the front surface as well as the side surface of the window cover glass substrate by performing the secondary chemical strengthening after the formation of the bezel portion, thereby improving the strength of the window cover glass substrate and improving the durability of the touch screen panel .

An additional printing process is then performed to reinforce the metal printing layer or the ceramic ink printing layer on the secondary chemically strengthened window cover glass substrate, Reinforced printing for reinforcement, and at the same time, IR coating or logo printing of the camera lens area is performed.

The additional printing process is a printing process performed once more by the metal printing layer or the ceramic ink printing layer to reinforce the color of the matrix after the printing, and the printing process such as silk screen printing, spin coating, and roll coating It is common to use.

That is, an additional printing process is performed on the secondary chemically strengthened product to improve the functionality and decorative property of the bezel portion.

Claims (12)

A method of manufacturing a window cover of a touch screen panel,
Preparing a disc glass;
First chemical strengthening said disc glass;
A metal printing layer having a pattern satisfying non-conductive conditions for forming a bezel portion of the touch screen panel may be formed on one side of the first chemically strengthened disc glass or a ceramic ink printing layer may be formed on a cell basis ;
Forming a glass cover glass substrate on a cell unit by cutting the disk glass on which the metal printing layer or the ceramic ink printing layer is formed by a cell unit;
Secondarily chemically reinforcing the window cover glass substrate cut in the cell unit;
Further comprising the steps of: providing an additional printing process to reinforce the metal printing layer or the ceramic ink printing layer on the secondary chemically reinforced window cover glass substrate. The method of claim 1, wherein the primary strengthening of the disc glass comprises:
Wherein the tempering temperature and the tempering time are set according to the thickness of the disc glass so that the center tension of the disc glass becomes 20 to 50 MPa. The method as claimed in claim 1,
Wherein the pattern has an intermittent line shape or a dot pattern. The method as claimed in claim 3,
Wherein the distance between the lines or dots is 1 to 20 占 퐉, and when 1000 V is applied, the non-conduction condition of 1 G? Or more at a distance of 10 mm is satisfied. The method as claimed in claim 1,
Laminating a photoresist coating or a dry film resist (DFR) on one side of the primary chemically reinforced disc glass;
Patterning the photoresist or the DFR to form a bezel in units of cells, and implementing a resist pattern for pattern formation of the metal print layer;
Depositing a metal on the photoresist or the DFR on which the resist pattern is formed, and removing the resist pattern to form a metal print layer. The method as claimed in claim 1,
Wherein one of Au, Ag, Al, W, Cr, Rh, and Mo is selected according to the color of the bezel. The method according to claim 1, wherein the formation of the ceramic ink printing layer on a cell-
Laminating a photoresist coating or a dry film resist (DFR) on one side of the primary chemically reinforced disc glass;
Patterning the photoresist or DFR to form a resist pattern for forming a bezel in units of cells;
Applying a ceramic ink on the photoresist or DFR on which the resist pattern is formed, and removing the resist pattern to form a ceramic ink print layer;
Drying the ceramic ink print layer;
And firing the dried ceramic ink print layer. The method of manufacturing a window cover of a touch screen panel, The ceramic ink printing layer according to claim 1,
Wherein at least one of a glass frit, a pigment, and a metal particle is used as the ink for forming the window cover of the touch screen panel. The glass cover glass substrate according to claim 1,
After masking the protective film on the disk glass and laser cutting,
Wherein the protective film is formed by peeling off the protective film. 10. The method according to claim 9, wherein before the protective film is peeled off,
Wherein the side portions of the window cover glass substrate of the cell unit are removed by micro-cracking of the side portions formed by the laser cutting through a chemical etching or polishing process. The method of claim 1,
By a dipping method using potassium nitrate (KNO ₃ ), a paste method using a solution containing potassium nitrate and zinc oxide, and a spray method using a potassium nitrate and an alcohol solution, Or chemically strengthening the front surface and the side surface of the touch screen panel. The printing method according to claim 1,
Wherein the metallic printing layer or the ceramic ink printing layer is reinforced for enhancing the color of the metallic printing layer or the ceramic ink printing layer, and simultaneously an IR coating or a logo printing is performed.

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