KR20100019709A - Method of manufacturing glass for display device - Google Patents

Abstract

PURPOSE: A method for manufacturing glass for a display device is provided to reduce fabrication process and fabrication cost and to facilitate adhesion and exfoliation of the film by adhering a film on the upper and lower sides of a glass for the display device. CONSTITUTION: A method for manufacturing glass for a display device comprises the steps of: (i) adhering a film on the glass for a display device; (ii) forming patterns for etching on the glass to which film is adhered; (iii) removing film of the etched surface of the glass on which pattern is formed; (iv) etching the etched surface of the glass from which a film is removed; (v) separating the rest film of the etched glass; and (vi) washing the glass from which a film is removed.

Description

Method of manufacturing glass for display device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing glass for display devices, and more particularly, to a method for manufacturing glass for display devices that can protect a display device from external impact, harmful components, and the like.

Various display devices, such as thin film transistor liquid crystal display (TFT-LCD), plasma display panel (PDP), organic light emitting diode (OLED), and the like, are used as the display device.

Since the display device is easily damaged from external impact or harmful components, a cover and a glass substrate made of glass, resin, or the like are used to protect the display device from such danger.

In particular, in order to be able to use an organic light emitting diode (OLED) that uses electroluminescence of an organic material as a display panel for mobile, the display panel must be able to withstand the impact from the outside.

In addition, since the organic EL device is easily deteriorated by oxygen, moisture, and other harmful gas components due to the nature of the organic material, the display device should not be directly exposed to the outside.

In order to protect the organic EL device from external impact, oxygen, moisture, and other harmful gas components, a sealing cap is placed on the organic EL device. As a cap for sealing the organic EL device, stainless steel or the like is conventionally used. Inorganic materials such as metal, glass and ceramics were used.

In particular, the cover glass for OLED is bonded to the glass substrate to the edge portion to protect the device formed on the glass substrate, and the remaining portion is formed with a space for protecting the device.

Conventional methods for manufacturing the cover glass for OLED include Patent Publication No. 568955 (April 10, 2006) and Publication No. 729653 (Jun. 19, 2007) from external shock, oxygen, moisture and other A method and apparatus for manufacturing a cover glass for sealing an organic electroluminescent element capable of protecting the organic electroluminescent element from harmful gas components and the like are disclosed.

Since the conventional cover glass is coated with resin on the glass surface, a pattern is formed and then etched, and the resin is peeled off after etching, excessive manufacturing time and manufacturing cost are required for the application and peeling of the resin, and the productivity of the cover glass is low. There is this.

In addition, since the resin is applied to the glass, it is difficult to completely block the upper and lower surfaces of the glass from the outside air, it is difficult to form the pattern for etching, and the coating film is broken during pattern formation, and the accuracy of the pattern for etching is low. There is this.

The present invention has been made to solve the above-mentioned conventional problems, it is possible to prevent damage to the display device glass, to reduce the manufacturing cost while reducing the number of manufacturing process of the display device glass, etching pattern It is an object of the present invention to provide a method for manufacturing a glass for display device which can be formed with high accuracy and can improve the positional accuracy of a pattern.

The present invention for achieving the above object, the film adhesion step of adhering a film on the display device glass; A pattern forming step of forming an etching pattern on the glass to which the film is attached; A film removing step of removing the film of the etching surface of the glass on which the pattern is formed; An etching step of etching the etching surface of the film removed glass; A film peeling step of peeling the remaining film of the etched glass; And a cleaning step of cleaning the glass from which the film has been peeled off.

Before the film adhesion step of the present invention further comprises a marking step of marking the reference point of the etching pattern on the glass with a laser or drill. In the film adhesive step of the present invention, the back film is brought into contact with the bottom surface of the glass, and the mask film is adhered to the top surface of the glass to seal the glass with the film.

The mask film and the back film of the present invention is made of any one of PVC, PO, PE and PET. The thickness of the mask film and the said back film of this invention is 0.01-0.3 mm. In the etching step of the present invention, the glass is immersed in an etching bath and the etching surface of the glass is etched.

As described above, the present invention forms a pattern for etching by adhering the film on the upper and lower surfaces of the glass for display, thereby easily adhering and peeling the film, thereby preventing damage to the display glass. It provides the effect of lowering the manufacturing cost while reducing the number of manufacturing process of the glass for the device.

In addition, by forming a pattern by marking a reference point on the glass using a laser or a drill, it is possible to form a pattern for etching with high accuracy and provides an effect of improving the position accuracy of the pattern.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

1 is a flowchart illustrating a method of manufacturing a glass for a display device according to an embodiment of the present invention, and FIG. 2 is a block diagram illustrating a film adhesion step of the method of manufacturing a glass for a display device according to an embodiment of the present invention. 3 is a cross-sectional view illustrating a glass to which a film is adhered by a method of manufacturing glass for a display device according to an embodiment of the present invention, and FIG. 4 is a method of manufacturing glass for a display device according to an embodiment of the present invention. 5 is a cross-sectional view showing a glass from which a film is removed, and FIG. 5 is a block diagram showing a marking step of a glass for a display device according to an embodiment of the present invention, and FIG. 6 is for a display device according to an embodiment of the present invention. 7 is a plan view illustrating a glass marked by a method of manufacturing glass, and FIG. 7 is based on a reference point marked by a method of manufacturing a glass for a display device according to an exemplary embodiment of the present invention. It is a top view which shows the glass in which the pattern was formed.

As shown in FIG. 1, the method of manufacturing the glass for the display device according to the present embodiment includes a film adhesion step S30, a pattern forming step S40, a film removing step S50, an etching step S60, and a film peeling step S70. ), Including the cleaning step (S80), to manufacture the glass for the display device.

As the display device to which the glass of the present embodiment is applied, various display devices such as a thin film transistor liquid crystal display (TFT-LCD), a plasma display panel (PDP), an organic light emitting diode (OLED), and the like may be used. The manufacturing method of the cover glass applied to OLED is demonstrated.

Film adhesion step (S30) is a manufacturing process for adhering the film on both sides of the glass 10 for the display device, the back film 12 (back film) in contact with the lower surface of the glass 10 in an adhesive state or non-adhesive state The mask film 11 is attached to the upper surface of the glass 10 to seal the glass 10 with a film.

Before adhering the film to the glass 10, the glass 10 is inspected for abnormality, and deionized water (DIW) is sprayed to remove the foreign matter attached to the glass 10. It is preferable to perform the washing step (S10) to wash.

Deionized water is water which removes all dissolved ions. Usually, ion exchange resin is used, and high-quality water close to pure water from which inorganic salts are removed from water for the purpose of using industrial water or drinking water.

In particular, the mask film 11 and the back film 12 preferably use a film made of any one of polyvinyl chloride (PVC), polyolefine (PO), polyethylene (PE), and polyethylene terephthalate (PET). In addition, as such a film, it is more preferable to use a film of a PVC-based material excellent in peelability in consideration of the peelability of the film after etching.

When the thickness of the mask film 11 and the back film 12 is thinner than 0.01 mm, the film may be damaged during adhesion and peeling, and when thicker than 0.3 mm, the formation of the pattern is difficult and the removal and peeling of the film are not easy. It is preferable to apply in 0.01-0.3 mm.

In particular, in consideration of the adhesiveness and peeling property of the film, the total thickness including the mask film 11 and the pressure-sensitive adhesive layer is applied to 0.04 ~ 0.1mm, the thickness of the back film 12 is more preferably applied to 0.2 ~ 0.3mm. Do.

As a pressure sensitive adhesive (PSA), it is preferable to use a removable adhesive made of an acrylic material.

In addition, the mask film 11 preferably has a predetermined strength of 30 to 900 kgf / cm 2 to facilitate the removal and peeling of the film, and a strength of 60 to 300 kgf / cm 2 to maintain optimum removability and peelability. It is more preferable to have.

As shown in FIG. 2, in the film adhesion step S30 of the present embodiment, the film is adhered to the upper and lower surfaces of the glass 10 by a laminating apparatus, and when the laminating, the mask film 11 is formed. The mask film 11 and the back film 12 are unwound by the 1st roll 20 wound up and the 2nd roll 30 by which the back film 12 is wound.

In this state, when the glass 10 passes through the space between the first roll 20 and the second roll 30, the upper roller 21 and the lower portion pass through the guide rolls 22 and 32 to which the film abuts. The film is attached to the upper and lower surfaces of the glass 10 by the roller 31.

Therefore, as shown in FIG. 3, when the film is attached to the upper and lower surfaces of the glass 10, the upper and lower surfaces of the glass 10 are closed by the film, and the mask film 11 and the circumference of the glass 10 are surrounded by the film. Since the back films 12 are attached to each other, the glass 10 is sealed by the film.

Pattern forming step (S40) is a mechanical device equipped with a blade on the mask film 11 adhered to the upper surface of the glass 10 to form a pattern for etching of a predetermined shape, the pattern of the etching pattern on the mask film 11 A cut line is formed. It is, of course, possible to use a variety of devices, such as a plotter as the mechanical device.

In addition, in order to determine whether the pattern for etching formed on the mask film 11 coincides with the shape of a predetermined display device, it is preferable to check the dimension of the pattern shape with a measuring instrument.

As shown in FIG. 4, in the film removing step S50, the mask film 11 of the etching surface 10a of the glass 10 on which the etching pattern is formed is removed, and the etching surface of the glass 10 ( 10a) will be exposed to the outside.

That is, since the etching surface 10a of the glass 10 is exposed to the outside, and the film is attached to the rest of the glass 10 to prevent contact with the outside, only the etching surface 10a of the glass 10 is exposed. The etchant comes into contact.

In addition, in order to determine whether the etching pattern shape from which the mask film 11 is removed coincides with the shape of a predetermined display device, it is preferable to inspect the pattern shape again by a separate pattern inspector.

In the etching step S60, the etching surface 10a of the glass 10 from which the mask film 11 is removed is etched with an etching solution. That is, the etching liquid contacts the etching surface 10a in the state in which the glass 10 from which the film of the etching surface 10a was removed was fixed to a jig and immersed in the etching process tank, and the etching surface 10a of the glass 10 was removed. Etched.

After etching, the etching amount is measured by a measuring instrument to determine that etching is performed within the range of the reference value on the etching surface 10a of the glass 10, and when determined to be normal, the glass 10 is removed from the jig. do.

In the film peeling step (S70), the film 10 is peeled off by sequentially immersing the glass 10 in a soaking bath and a peeling bath to peel off the remaining film of the glass 10 etched in this way.

In the cleaning step S80, deionized water (DIW) is sprayed onto the glass 10 from which the film is peeled off to clean the glass 10.

5 to 7, the marking step S20 of marking the reference points P1 and P2 of the etching pattern on the glass 10 by laser or drill, as shown in FIG. 5 to FIG. 7. It is preferable to further include.

In the marking step S20, two or more points are recognized on the sides of the long axis and the short axis of the glass 10 to form a virtual x-axis and a y-axis, and automatically correct the axis. Two reference points P1 and P2 or two or more reference points are laser-marked as alignment keys at a distance apart from the coordinate value.

As such a laser, it is preferable to mark the region of the middle layer of the glass by using ultraviolet (ultraviolet) having a wavelength of 500 nm or less.

Therefore, when the right angle of the glass 10 is not exactly 90 degrees, the etching pattern shape is formed based on one end surface of the glass 10, thereby solving the problem of deformation of the etching pattern shape.

In addition, in the subsequent pattern forming step (S40) after accurately recognizing the center value of the alignment key (Align Key) marked on the glass 10 in the vision camera of the plotter (Plotter), Figure 6 and Figure As shown in FIG. 7, the etching pattern is formed on the upper surface of the glass 10 by matching the center coordinate values of the align key.

The present invention described above can be embodied in many other forms without departing from the spirit or main features thereof. Therefore, the above embodiments are merely examples in all respects and should not be interpreted limitedly.

1 is a flowchart illustrating a method of manufacturing a glass for a display device according to an embodiment of the present invention.

Figure 2 is a block diagram showing a film adhesion step of the manufacturing method of the glass for a display device according to an embodiment of the present invention.

3 is a cross-sectional view of a glass to which a film is adhered by a method of manufacturing a glass for a display device according to an embodiment of the present invention.

4 is a cross-sectional view of a glass from which a film is removed by a method of manufacturing a glass for a display device according to an embodiment of the present invention.

5 is a block diagram showing a marking step of the glass for a display device according to an embodiment of the present invention.

6 is a plan view showing a glass marked by the method for manufacturing a glass for a display device according to an embodiment of the present invention.

FIG. 7 is a plan view illustrating a glass on which a pattern is formed based on a reference point marked by a method of manufacturing glass for a display device according to an embodiment of the present disclosure; FIG.

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

10: glass 11: mask film

12: back film 20: first roll

30: second roll

Claims (6)

A film adhesion step of adhering the film on the glass for the display device; A pattern forming step of forming an etching pattern on the glass to which the film is attached; A film removing step of removing the film of the etching surface of the glass on which the pattern is formed; An etching step of etching the etching surface of the glass from which the film is removed; A film peeling step of peeling the remaining film of the etched glass; And And a cleaning step of cleaning the glass from which the film has been peeled off. The method of claim 1, And a marking step of marking the reference point of the etching pattern on the glass with a laser or a drill before the film adhesion step. The method according to claim 1 or 2, The film adhesion step of manufacturing a glass for a display device, characterized in that the back film is in contact with the lower surface of the glass and the mask film is adhered to the upper surface of the glass, the glass is sealed with a film. The method of claim 3, wherein The mask film and the back film is made of any one of PVC, PO, PE and PET. The method of claim 3, wherein The thickness of the said mask film and said back film is 0.01-0.3 mm, The manufacturing method of the glass for display devices. The method of claim 1, And the etching step comprises etching the etching surface of the glass by immersing the glass in an etching bath.

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