KR20110034891A - Resistive type touch screen process with decoration by using vacuum deposition method - Google Patents

Resistive type touch screen process with decoration by using vacuum deposition method Download PDF

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Publication number
KR20110034891A
KR20110034891A KR1020090092370A KR20090092370A KR20110034891A KR 20110034891 A KR20110034891 A KR 20110034891A KR 1020090092370 A KR1020090092370 A KR 1020090092370A KR 20090092370 A KR20090092370 A KR 20090092370A KR 20110034891 A KR20110034891 A KR 20110034891A
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KR
South Korea
Prior art keywords
transparent electrode
electrode layer
touch screen
decoration
vacuum
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Application number
KR1020090092370A
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Korean (ko)
Inventor
이상희
임재현
정지훈
Original Assignee
(주)넥스디스플레이
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Application filed by (주)넥스디스플레이 filed Critical (주)넥스디스플레이
Priority to KR1020090092370A priority Critical patent/KR20110034891A/en
Publication of KR20110034891A publication Critical patent/KR20110034891A/en

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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
    • 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
    • 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

PURPOSE: A resistive type touch screen process with decoration by using a vacuum deposition method is provided to remarkably improve the transmittance ratio by using reinforced glass. CONSTITUTION: A first transparent electrode layer(101) is formed, and a transparent conductive material is deposited on a lower portion of a flexible plastic film(105). A second transparent electrode layer(104) is formed, and a dot spacer is bonded between the first transparent electrode layer and the second transparent electrode layer.

Description

Resistive type touch screen process with decoration by using vacuum deposition method

The present invention relates to a method of manufacturing a resistive touch screen panel using a deposition method, and to a method for manufacturing a resistive touch screen panel having a simple, fast and low defect rate, which is robust, thin and improved in transmittance. It is about.

A touch screen is a type of input device that can operate a computer in an interactive way using only the screen without knowledge of the computer. In other words, a simple method of directly pressing a computer screen is a technology that can replace an input device such as a keyboard and a mouse, so that even beginners who are not familiar with the computer can easily use the computer.

The touch screen is a contact electrostatic method produced by coating a resistive component on a substrate such as glass and applying a plastic film on the resistive overlay, and coating a special conductive metal on both sides of the tempered glass. Capacitive overlay, Infrared LED and Photo-Transister, a light-receiving element, are placed facing each other to create an Opto-Matrix Frame and mounted around the front cover of the monitor Infrared Beam (Infrared Beam), Integral Strain Guage (Strain Guage) attaching a strain gauge that can measure the force on the corners, Transmitter that emits sound waves A reflector that reflects sound waves in a constant range and receives sound on the other side of the transmitter. Surface acoustic wave, which attaches a receiver, and piezo-effect, which attaches a pressure-sensitive crystal crystal to the edge of the screen to sense touch. It can manufacture by a method.

However, in recent years in the development of digital input devices in home appliances, automobiles, communication devices, PDAs, etc., resistive touch screens are simple in terms of price and mounting, thus overwhelming other methods.

In the resistive touch screen, as shown in FIG. 1, two substrates (transparent electrode layers) coated with a transparent conductive film are bonded to each other such that the transparent electrode layers face each other. At this time, if the substrate is touched by a finger or a pen while an electrical signal for position detection is applied on one transparent electrode layer, the transparent electrode layer of the upper substrate contacts the transparent electrode layer of the lower substrate, and the electrical signal is transmitted on the opposite transparent electrode layer. It is a method of recognizing and determining coordinates using the detected and detected magnitude of an electrical signal.

The resistive touch screens are exploding, but the conventional resistive touch screens have various problems as follows.

Figure 2 shows a schematic diagram of a cross section of a conventional resistive touch screen panel. The conventional resistive touch screen panel as shown in FIG. 1 manufactures a lower plate to which the ITO film 12 is adhered by the transparent adhesive layer 11 on the substrate 10, and the decoration 16 is bonded to the ITO film 12. And the upper plate bonded by the transparent adhesive layer 11, and then the dot spacer layer 15 is bonded to the upper and lower ITO film 12 layers by using a double-sided adhesive layer 13. . Therefore, the total number of processes for manufacturing the touch screen panel is increased, and the loss of time and products is high due to the large number of processes.

In particular, the conventional resistive touch screen panel has a limited transmittance due to the characteristics of the ITO film used as a transparent conductive film, and furthermore, since two such ITO films are used, the transmittance is lowered, and high haze and Problems such as high B star characteristics have been pointed out.

The present invention has been proposed to solve the above problems, and provides a method of manufacturing a resistive touch screen panel by shortening the entire manufacturing process by introducing a deposition technique and improving the decoration process in manufacturing a resistive touch screen panel. There is a purpose.

Another object of the present invention is to provide a resistive touch screen panel having a thin thickness and an improved transmittance.

As an example for achieving the above object, the present invention comprises the steps of: vacuum depositing a transparent conductive material on one surface of the tempered glass and forming a pattern to form a first transparent electrode layer; After vacuum-depositing a transparent conductive material on the lower surface of the flexible plastic film to form a pattern to form a second transparent electrode layer, by vacuum-depositing the decoration using a mask sheet on the upper surface of the flexible plastic film and the top plate coated with a protective layer Forming; And forming a dot spacer layer bonded by an insulating double-sided tape between the first transparent electrode layer and the second transparent electrode layer of the upper plate.

In addition, the present invention as another example for achieving the above object, the transparent conductive material is vacuum-deposited on one surface of the tempered glass first transparent electrode layer; A top plate including a second transparent electrode layer on which a conductive material is vacuum-deposited and a pattern is formed on the bottom surface of the flexible plastic film, a vacuum-deposited decoration on the top surface of the flexible plastic film, and a protective layer formed on the decoration surface; And a dot spacer layer bonded between the first transparent electrode layer and the second transparent electrode layer of the upper plate with an insulating double-coated tape.

According to the present invention described above, since the tempered glass is used instead of the ITO film, the transmittance can be greatly improved than in the case of using the conventional ITO film.

In addition, according to the present invention, since the adhesive layer (OCA process) can be omitted, the effect of making the thickness slim can be expected.

In addition, according to the present invention, since most of the processes are performed through vacuum deposition, the external environment can be improved and the defective rate of the finished product can be greatly reduced.

In addition, according to the present invention, since the process can be shortened, it can contribute to the improvement of productivity.

The objects, features and advantages of the present invention described above will become more apparent from the following detailed description. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to each manufacturing step and the accompanying drawings.

1 is a simplified exploded perspective view of a conventional resistive touch screen panel, FIG. 2 is a schematic view of a cross section of a conventional resistive touch screen panel, and FIG. 3 is a schematic view of a cross section of a resistive touch screen panel of the present invention. 4 shows an example of vacuum deposition using a mask sheet when forming a decoration of the resistive touch screen panel of the present invention.

First, a step of forming a first transparent electrode layer 101 by vacuum depositing a transparent conductive material on one surface of the tempered glass and forming a pattern.

Tempered glass is used as a substrate, and transparent conductive material is vacuum-deposited on one surface of the tempered glass to form a transparent conducting oxide (TCO).

The tempered glass may be used in the thickness of 0.55mm or more range, preferably, 0.7mm to 1.0mm range that is used. If the thickness of the tempered glass is less than the above range, the strength tends to be insufficient, and if the thickness is too thick beyond the above range, the overall thickness becomes thick, thus losing the purpose of slimming, and the transmittance tends to decrease. Not desirable

Although not limited to the transparent conductive material, for example, any one selected from indium tin oxide (ITO), fluorine-doped tin oxide (FTO), and indium zinc oxide (IZO) may be used.

The vacuum deposition is performed by RF / DC sputter, electron beam (E-beam), laser ablation, cathodic arc evaporation, or the like.

By vacuum depositing a conductive material on the tempered glass as described above, unlike the case where the ITO film is adhered to the substrate using an adhesive such as OCA or the like, the process of cutting the ITO film or applying the adhesive is performed. It can omit and the effect which can improve transparency can be acquired.

As described above, in order to bond the ITO film, it was necessary to cut the ITO film in a separate process, but in the present invention, the cutting process may be omitted, and the use of the adhesive necessary for bonding the substrate and the ITO film may be excluded. As a result, the shortening of the process and the absence of adhesives can reduce the possibility of workers being exposed to hazardous environments, which is effective for improving the working environment.

The transparent electrode layer forms a pattern suitable for the use of the resistive touch screen panel, and the pattern may be formed by various methods commonly applied in the art. Specifically, for example, a large number of etching techniques are used for pattern formation, which may be performed using chemicals or laser etching.

In addition, the forming of the upper plate including the second transparent electrode layer 104 is performed.

In order to form the upper plate, a transparent conductive material is vacuum-deposited on the lower surface of the flexible plastic film 105, and then a pattern is formed to form a second transparent electrode layer 104, and a mask is formed on the upper surface of the flexible plastic film 105. The sheet is used to vacuum the decoration 106 and form a top plate coated with the protective layer 107.

The flexible plastic film 105 may be used to select those suitable for the use of a resistive touch screen panel having transparency and strength, but is not limited thereto. Specifically, polyethylene terephthalate (PET), polyethylene sulfone (PES), and polyethylene (PEN) may be used. naphthalate) or the like can be used.

The flexible plastic film 105 may have a thickness of 100 μm or more, and preferably 100 μm to 188 μm. If the thickness 105 of the flexible plastic film is less than the above range, the hardness of the material tends to be insufficient. If the thickness of the flexible plastic film is too high above the range, transparency and transmittance tend to decrease, which is not preferable.

In the present invention, vacuum deposition is performed on both sides of the flexible plastic film 105, one side of the transparent conductive material is vacuum-deposited to form a second transparent electrode layer 104, the other side of the decoration by vacuum deposition method 106 ).

The vacuum deposition for forming the second transparent electrode layer 104 may be performed in the same way as the vacuum deposition performed for forming the first transparent electrode layer 101. The pattern may be formed on the second transparent electrode layer 104 in the same manner as was performed to form the first transparent electrode layer 101.

Meanwhile, a decoration 106 is formed on the other surface of the flexible plastic film 105. The decoration 106 may be formed with a variety of logos or patterns.

In the conventional case, in order to form the decoration 106, the process of coating and drying and baking the pigment and then coating and drying and baking the pigment again had to be repeated several times. Thus, the process was complicated and time-consuming. There was a problem that the defective rate is high.

In contrast, in the present invention, vacuum deposition is performed using various mask sheets as shown in FIG. 4. Therefore, the process can be shortened, the defect rate is reduced, and unlike the conventional repeated printing, there is an advantage that the thickness of the decoration 106 is formed because of vacuum deposition.

In addition, since the second transparent electrode layer 104 and the decoration 106 may be formed on both surfaces of the flexible plastic film 105 by vacuum deposition, there is no need for an adhesive layer (OCA), and a single flexible plastic film 105 may be formed. It can greatly contribute to improving transparency.

A protective layer 107 is formed to protect the decoration 106 from external stimuli and to prevent oxidation and abrasion of the decoration 106. The protective layer 107 has a water vapor transmission rate of 10 −3 or less and satisfies a property resistant to scratching against a 2H pencil, and the protective layer 107 forms a passivation layer or It may be hardcoating by applying encapsulation or the like.

Lastly, a dot spacer layer 103 is formed between the first transparent electrode layer 01 and the second transparent electrode layer 104 of the upper plate by bonding with an insulating double-sided tape 103 (DAT). .

The bonding is performed by a conventional method of cutting the insulating double-sided tape and then attaching and assembling the first transparent electrode layer 101 or the second transparent electrode layer 104. The process of forming the dot spacer layer 103 is also common. The method can be applied.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be evident to those who have knowledge of.

1 is a simplified exploded perspective view of a conventional resistive touch screen panel.

2 is a schematic view of a cross section of a conventional resistive touch screen panel.

3 is a schematic view of a cross section of a resistive touch screen panel of the present invention.

Figure 4 shows an example of vacuum deposition using a mask sheet when forming the decoration of the resistive touch screen panel of the present invention.

[Description of Major Symbols in Drawing]

101: first transparent electrode layer 102: dot spacer

103: double-sided adhesive tape 104: second transparent electrode layer

105: flexible transparent film 106: decoration

107: protective layer

Claims (7)

Vacuum depositing a transparent conductive material on one surface of the tempered glass and forming a pattern to form a first transparent electrode layer; After vacuum-depositing a transparent conductive material on the lower surface of the flexible plastic film to form a pattern to form a second transparent electrode layer, by vacuum-depositing the decoration using a mask sheet on the upper surface of the flexible plastic film and the top plate coated with a protective layer Forming; And, And forming a dot spacer layer bonded between the first transparent electrode layer and the second transparent electrode layer of the upper plate with an insulating double-coated tape. The method according to claim 1, The transparent conductive material is a method of manufacturing a resistive touch screen panel, characterized in that made of any one selected from indium tin oxide (ITO), fluorine-doped tin oxide (FTO), and indium zinc oxide (IZO). The method according to claim 1, The flexible plastic film is a method of manufacturing a resistive touch screen panel, characterized in that selected from polyethylene terephthalate (PET), polyethylene sulfone (PES), polyethylene naphthalate (PEN). The method according to claim 1, The decoration is a method of manufacturing a resistive touch screen panel, characterized in that formed in the non-display area of the touch screen panel. The method according to claim 1, The decoration is a method of manufacturing a resistive touch screen panel, characterized in that formed by vacuum deposition using a mask sheet. The method according to claim 1, The protective layer has a water vapor transmission rate of 10 −3 or less and satisfies scratch resistant properties against 2H pencils. A first transparent electrode layer on which one surface of the tempered glass is vacuum deposited and a pattern is formed; A top plate including a second transparent electrode layer on which a conductive material is vacuum-deposited and a pattern is formed on the bottom surface of the flexible plastic film, a vacuum-deposited decoration on the top surface of the flexible plastic film, and a protective layer formed on the decoration surface; And, A resistive touch screen panel comprising a dot spacer layer bonded between the first transparent electrode layer and the second transparent electrode layer of the upper plate with an insulating double-sided tape.
KR1020090092370A 2009-09-29 2009-09-29 Resistive type touch screen process with decoration by using vacuum deposition method KR20110034891A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013103704A1 (en) * 2012-01-02 2013-07-11 Microsoft Corporation Non-optically bonded display device
KR101385952B1 (en) * 2013-04-29 2014-04-16 주식회사 옵트론텍 Transparent electrode structure for touch screen applying for a vehicle
KR20150088101A (en) * 2014-01-23 2015-07-31 삼성디스플레이 주식회사 Flexible display apparatus and method of manufacturing thereof
US11029724B2 (en) 2017-12-12 2021-06-08 Samsung Display Co., Ltd. Display device with pressure sensor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013103704A1 (en) * 2012-01-02 2013-07-11 Microsoft Corporation Non-optically bonded display device
KR101385952B1 (en) * 2013-04-29 2014-04-16 주식회사 옵트론텍 Transparent electrode structure for touch screen applying for a vehicle
KR20150088101A (en) * 2014-01-23 2015-07-31 삼성디스플레이 주식회사 Flexible display apparatus and method of manufacturing thereof
US10903287B2 (en) 2014-01-23 2021-01-26 Samsung Display Co., Ltd. Foldable, flexible display apparatus and method of manufacturing the same
US11588004B2 (en) 2014-01-23 2023-02-21 Samsung Display Co., Ltd. Foldable, flexible display apparatus and method of manufacturing the same
US11029724B2 (en) 2017-12-12 2021-06-08 Samsung Display Co., Ltd. Display device with pressure sensor

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