KR20140142533A - Touch panel and method of manufacturing the same - Google Patents
Touch panel and method of manufacturing the same Download PDFInfo
- Publication number
- KR20140142533A KR20140142533A KR1020130064079A KR20130064079A KR20140142533A KR 20140142533 A KR20140142533 A KR 20140142533A KR 1020130064079 A KR1020130064079 A KR 1020130064079A KR 20130064079 A KR20130064079 A KR 20130064079A KR 20140142533 A KR20140142533 A KR 20140142533A
- Authority
- KR
- South Korea
- Prior art keywords
- cell
- substrate
- transparent substrate
- bezel
- glass
- Prior art date
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Classifications
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- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/14—Non-insulated conductors or conductive bodies characterised by their form comprising conductive layers or films on insulating-supports
-
- 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
Description
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a touch panel and a method of manufacturing the touch panel, and more particularly, to a touch panel that receives a touch panel and a method of manufacturing the touch panel.
Generally, the touch panel is installed on the surface of a display device such as a CRT, LCD, PDP, EL (electroluminescence), etc., and when a user touches the touch panel with an input device such as a finger or a stylus, And has been widely used in various electronic apparatuses such as personal digital assistants (PDA), notebook computers, OA devices, medical devices, and car navigation systems.
Such a method of implementing the touch panel includes a resistance film method, a capacitance method, an ultrasonic method, and an infrared method depending on the method of position detection.
In the resistive type, two substrates having a transparent electrode layer (ITO film) coated thereon are bonded together with a dot spacer therebetween so that the transparent electrode layers face each other. A signal for detecting the position is applied when the upper substrate is contacted with a finger or a pen, and an electrical signal is detected when the upper substrate contacts the transparent electrode layer of the lower substrate to determine the position. This method has the disadvantage of high durability and high risk of breakage while high response speed and economical efficiency.
In the electrostatic capacity type, a conductive metal material is coated on one surface of a base film constituting a touch sensor to form a transparent electrode, and a certain amount of current flows on the surface of the cover substrate. When the user touches the screen, the portion where the amount of current is changed is recognized using the capacitance in the human body, and the size is calculated to determine the position. It has a disadvantage in that it is difficult to operate by a hand with a pen or glove because it uses the electrostatic capacity of the human body while having excellent durability and transmittance.
In the ultrasonic method, a piezoelectric element using a piezoelectric effect is used to alternately generate the surface waves generated in the touch panel contact in the X and Y directions, and the position is determined by calculating the distances to the respective input points. Although the resolution and light transmittance are high, there is a drawback that the sensor is susceptible to contamination and liquids.
In the infrared system, a plurality of light emitting elements and light receiving elements are arranged around the panel to form a matrix structure. When the light beam is blocked by the user, the X and Y coordinates of the blocked portion are obtained and the input coordinates are determined. It has a high light transmittance and a strong durability against external impact or scratching, while it has a disadvantage in that it has a low discrimination ability and a slow response time for bulky and inaccurate touches.
In such a touch panel, a bezel portion for determining an effective screen area is formed at the edge of the cover substrate. The bezel part prevents the wiring of the signal line or the power line from being visible to the outside, enhances the contrast of the effective screen by contrast with the effective screen area, and enhances the visual dignity by giving a sense of beauty to itself.
Regarding the bezel portion, in recent years, various attempts have been made to implement various colors of the bezel portion in order to pursue design diversity of the touch panel.
However, since the hiding power to prevent the wiring of the signal line or the power line from being visible to the outside is lower than the color such as white or blue as compared with the black color, the printing thickness of the bezel portion It should be thick. However, if the printing thickness of the bezel portion is increased as described above, the step between the
On the other hand, a manufacturing method of manufacturing a cover substrate-integrated touch panel using a chemically tempered glass which is widely used as a cover substrate of a touch panel can be broadly divided into a sheet method and a cell method.
The sheet method is a method of manufacturing a touch panel by reinforcing a large disc glass, implementing a plurality of touch panels on a disc glass, cutting and processing the same, and the cell method is a method of cutting a large glass substrate to a product size, A method of manufacturing a touch panel using a reinforced and reinforced cover glass.
In the sheet method, since the touch panel is manufactured by a method of implementing a large number of touch panels in a large disc glass, it is highly productive. On the other hand, it is difficult to cut and process the reinforced disc glass, and the edge portion of the cover glass And the micro-cracks are present at the edge portions, so that the strength of the edge portions of the cover glass is lowered.
In the case of the cell type, since the touch sensor is implemented on the cover glass reinforced per cell, the edge portion of the cover glass also has excellent strength, but has a disadvantage of low productivity.
SUMMARY OF THE INVENTION It is an object of the present invention to provide a touch panel which is not affected by a step between a cover substrate and a bezel, and a method of manufacturing the touch panel.
To this end, the present invention provides a semiconductor device comprising: a cover substrate; A bezel formed along a rim of the one surface of the substrate; A transparent substrate disposed on one side of the substrate and the bezel; And an electrode layer formed on the transparent substrate.
Here, the transparent substrate may be a thin film glass substrate having a thickness of 0.2 mm or less.
The touch panel may further include an anti-reflection layer formed on at least one surface of the cover substrate.
The electrode layer may have a structure in which an X-axis electrode, an insulating film, and a Y-axis electrode are stacked.
The display device may further include a bonding layer for bonding the cover substrate formed with the bezel portion to the transparent substrate between the cover substrate having the bezel portion and the transparent substrate.
Here, the bonding layer may be formed of OCA (optical clear adhesive) or OCR (optical clear resin).
According to another aspect of the present invention, A second step of processing the disc glass into a cell shape so that the cell is not separated from the disc glass; A third step of reinforcing the disc glass through a chemical strengthening process; A fourth step of forming a bezel part for partitioning the effective screen area of the touch panel on the cell; A fifth step of bonding a transparent substrate on the cell on which the bezel is formed; A sixth step of forming an electrode layer on the transparent substrate; And a seventh step of fabricating and separating the disk glass and the transparent substrate according to the shape of the partially processed cell.
Here, the second step may be to puncture a plurality of slits passing through upper and lower portions of the disc glass and arranged along the cell shape.
In the fifth step, the transparent substrate may be bonded to a cell having the bezel formed thereon through optical clear adhesive (OCA) or optical clear resin (OCR).
In addition, the seventh step may separate the cell from the disc glass through laser or wheel processing.
The method may further include forming an antireflection film on the cell having the bezel formed thereon by a dip coating method after the fourth step.
In the second step, a plurality of cell shapes may be processed in the disc glass.
The transparent substrate may be a thin film glass substrate having a thickness of 0.2 mm or less.
According to the present invention, by forming the electrode layer on the transparent substrate disposed on the bezel, intermittent formation of the electrodes or shorting of the electrodes due to the step difference between the cover substrate and the bezel can be solved.
Further, according to the present invention, it is possible to reduce the production cost of the touch panel and improve the productivity, and it is possible to solve the problem of lowering the strength of the edge of the touch panel.
1 is a conceptual cross-sectional view of a conventional touch panel;
2 is a conceptual cross-sectional view of a touch panel according to an embodiment of the present invention;
3 is a schematic flow chart of a method of manufacturing a touch panel according to an embodiment of the present invention.
Hereinafter, a touch panel and a method of manufacturing the same according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.
2 is a conceptual sectional view of a touch panel according to an embodiment of the present invention.
2, the touch panel according to an embodiment of the present invention may include a
The
The glass generally uses a thickness of 1 mm or less and is made of soda-lime or aluminosilicate, which has a high transmittance or an alkali-free system. The use of glass has the property of solving the problems of transparency, long-term durability, touch feeling, etc. of the plastic material, but it has a disadvantage that it is weak against impact. The touch panel is attached to the display portion of various devices. Especially, when attached to a mobile phone having a small size and a small size, the touch panel should have a strength that can ensure durability against external impact. Soda lime glass is generally lower in strength than glass in non-alkaline systems, but it can be strengthened through a chemical treatment in which sodium (Na) is replaced with potassium (K) in the components. This is called chemical tempered glass, and is widely used as a cover substrate for touch panels.
The
The
The
Preferably, the
The
The
An index matching layer (not shown) may be formed between the
As described above, the touch panel according to the present invention can be manufactured by forming the
The touch panel according to an embodiment of the present invention may further include an anti-reflection layer (not shown) formed on one surface or the other surface of the
An antireflection film (not shown) reduces the reflectance of visible light to suppress the occurrence of a phenomenon in which glare due to reflection or a phenomenon in which the screen is invisible, and improves the visibility by increasing the transmittance of the touch panel. The antireflection film (not shown) may include at least one material selected from the group consisting of oxides and nanowires.
A touch panel according to an embodiment of the present invention includes a
Here, the bonding layer (not shown) may be formed of OCA (optical clear adhesive) or OCR (optical clear resin).
3 is a schematic flowchart of a method of manufacturing a touch panel according to an embodiment of the present invention.
A method of manufacturing a touch panel according to an embodiment of the present invention is a method of manufacturing a touch panel using a sheet method. First, a disc glass is prepared to manufacture a touch panel (S100).
The disc glass may be soda lime silicate glass or aluminosilicate glass.
Next, the disc glass is processed into a cell shape so that the cell is not separated from the disc glass (S200).
The cell portion processing step (S200) may be performed by passing a plurality of slits passing through the upper and lower sides of the disc glass and arranged along the cell shape. When the number of the slits is large or the size is large, the ratio of the edge portions to be strengthened is increased, but the stability of the perforated disc glass is decreased. On the other hand, as the number of slits is small and the size is small, the stability of the perforated disc glass is increased, but the ratio of the reinforced edge portion is decreased, so that the strength of the edge portion of the cover glass is weakened. Accordingly, the number and size of the slits should be appropriately adjusted in consideration of the stability and the strength of the cover glass.
The drilling of the disc glass can be carried out in various ways such as CNC (computer numerical control) based waterjet, sandblast, drilling and the like.
In the cell portion processing step (S200), a plurality of cell shapes can be processed in one disc glass. In this case, in order to reduce the cost, the disc glass other than the cell will be designed to be minimized.
Next, the original glass is strengthened through the chemical strengthening process (S300).
In the chemical strengthening step (S300) of the disc glass, the alkali ions in the partially processed disc glass are exchanged with other alkali ions having a larger ion radius to form a compressive stress on the glass surface.
A typical chemical strengthening is done by exchanging Na ions in glass with K ions in ion radius. Multivalent ion other than the alkali metal is therefore difficult to move in the glass Mg 2+ or Ca 2 + does yirwojiji good chemical strengthening by ion exchange. Also, even if the ion radius is too large, the diffusion is inhibited in the glass, so even if the same monovalent ion, Rb + or Cs + does not chemically strengthen by ion exchange.
Since the edge of the partially processed cell is reinforced by the chemical strengthening process after the disc glass is partially processed into the cell shape, the edges of the cell are not strengthened at all during the manufacturing of the touch panel by the conventional sheet method, The problem that the strength is lowered can be solved.
Next, a bezel portion for partitioning the effective screen region of the touch panel on the cell is formed (S400).
The bezel portion can be formed by coating a material including a pigment such as black, white, and blue along the edge of the cell by various methods such as printing, lithography, inkjet, and the like.
Next, the transparent substrate is bonded onto the cell having the bezel part (S500).
A transparent substrate may be bonded on a cell having a bezel part by attaching an optical clear adhesive (OCA) on the cell having the bezel part or applying an optical clear resin (OCR) and bonding the transparent substrate.
Here, the transparent substrate is preferably a thin film glass substrate of 0.2 mm or less in order to facilitate processing and improve the transmittance of the touch panel.
Next, an electrode layer is formed on the transparent substrate (S600).
The electrode layer may have a structure in which an X-axis electrode, an insulating layer, and a Y-axis electrode are stacked, or a single layer structure in which an X-axis electrode and a Y-axis electrode are formed as one layer. Specifically, when the electrode layer has a structure in which an X-axis electrode, an insulating film, and a Y-axis electrode are laminated, a transparent conductive film made of ITO or the like is coated on the transparent substrate by a sputtering deposition method and then the transparent conductive film is etched, An electrode layer may be formed by patterning an insulating layer on the X-axis electrode, coating a transparent conductive layer made of ITO or the like on the insulating layer by sputtering again, and then etching the transparent conductive layer to pattern the Y-axis electrode .
Finally, the touch panel can be manufactured by processing the disc glass and the transparent substrate according to the shape of the partially processed cell and separating them (S700).
Separation of the disc glass and transparent substrate can be accomplished by laser or wheel machining. On the other hand, it is possible to smooth the edge surface by chamfering the edge surface of the touch panel after the separation processing.
The touch panel according to an embodiment of the present invention may further include a step of forming an antireflection film on the cell having the bezel formed before the bezel forming step S400 and the transparent substrate bonding step S500.
The antireflection film may be formed by dip coating a disc glass. That is, the antireflection film may be formed on the cell having the bezel formed by immersing the disc glass in a coating solution or slurry containing the antireflective material.
In addition, the method may further include forming an index matching layer for preventing the pattern shape of the entire electrode layer from being visually exposed to the outside after the transparent substrate bonding step S500 (S600).
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. This is possible.
Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of the appended claims as well as the appended claims.
100: cover substrate 200: bezel
300: transparent substrate 400: electrode layer
Claims (13)
A bezel formed along a rim of the one surface of the substrate;
A transparent substrate disposed on one side of the substrate and the bezel; And
And an electrode layer formed on the transparent substrate.
Wherein the transparent substrate is a thin film glass substrate having a thickness of 0.2 mm or less.
Further comprising an anti-reflection film formed on at least one surface of the cover substrate.
Wherein the electrode layer has a structure in which an X-axis electrode, an insulating film, and a Y-axis electrode are laminated.
And a bonding layer for joining the transparent substrate and the cover substrate having the bezel portion between the cover substrate and the transparent substrate with the bezel portion formed thereon.
Wherein the bonding layer is made of OCA (optical clear adhesive) or OCR (optical clear resin).
A second step of processing the disc glass into a cell shape so that the cell is not separated from the disc glass;
A third step of reinforcing the disc glass through a chemical strengthening process;
A fourth step of forming a bezel part for partitioning the effective screen area of the touch panel on the cell;
A fifth step of bonding a transparent substrate on the cell on which the bezel is formed;
A sixth step of forming an electrode layer on the transparent substrate; And
And a seventh step of separating and processing the disc glass and the transparent substrate according to the shape of the partially processed cell.
Wherein the second step comprises drilling a plurality of slits passing through the top and bottom of the disc glass and arranged along the cell shape.
Wherein the transparent substrate is bonded to a cell formed with the bezel through optical clear adhesive (OCA) or optical clear resin (OCR).
Wherein the seventh step separates the cell from the disc glass through laser or wheel processing.
Further comprising the step of forming an anti-reflection film on the cell having the bezel formed thereon by a dip coating method after the fourth step.
And the second step is to process a plurality of cell shapes in the disc glass.
Wherein the transparent substrate is a thin film glass substrate having a thickness of 0.2 mm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020130064079A KR20140142533A (en) | 2013-06-04 | 2013-06-04 | Touch panel and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020130064079A KR20140142533A (en) | 2013-06-04 | 2013-06-04 | Touch panel and method of manufacturing the same |
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| Publication Number | Publication Date |
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| KR20140142533A true KR20140142533A (en) | 2014-12-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1020130064079A KR20140142533A (en) | 2013-06-04 | 2013-06-04 | Touch panel and method of manufacturing the same |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107683454A (en) * | 2015-09-14 | 2018-02-09 | 株式会社东海理化电机制作所 | Operation device |
| KR102294345B1 (en) | 2021-03-25 | 2021-08-26 | 주식회사 지에스아이 | Method for Coating Optically Clear Adhesive |
-
2013
- 2013-06-04 KR KR1020130064079A patent/KR20140142533A/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107683454A (en) * | 2015-09-14 | 2018-02-09 | 株式会社东海理化电机制作所 | Operation device |
| KR102294345B1 (en) | 2021-03-25 | 2021-08-26 | 주식회사 지에스아이 | Method for Coating Optically Clear Adhesive |
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