KR20020022372A - The process of an encapsulation glass for an organic electroluminescent display - Google Patents

Abstract

PURPOSE: A method is provided to reduce manufacturing cost and achieve an improved manufacturing efficiency by manufacturing encapsulated glass through an extrusion molding rather than a chemical method. CONSTITUTION: A method comprises a first step(S10) for heating and melting a surface of a glass formed into a predetermined size; a second step(S11) of forming a groove by compressing a groove forming element to the surface of the glass which is passed through the first step; and a third step(S12) of cooling the glass. The groove forming element is a compression roller having a recess corresponding to the shape of the groove.

Description

The process of an encapsulation glass for an organic electroluminescent display

The present invention relates to a manufacturing method of a sealing glass for an organic electroluminescent display, and more particularly, to a manufacturing method of a sealing glass for an organic electroluminescent display which can be molded by extrusion or injection.

In general, the organic electroluminescent display is damaged due to the internal electrode layers are easily affected by the external environment, humidity and mechanical damage. Therefore, to prevent this, the assembly can be encapsulated and protected.

In order to seal the display assembly as described above, the sealing glass 12 as shown in FIG. 1 is covered on the organic EL layer 11 and the substrate 10 on which the electrodes are formed to be bonded. At this time, a moisture absorbent 14 is provided between the sealing glass 12 and the organic EL layer 11 to remove moisture from the sealed inner space, so that the moisture absorbent 14 is mounted and the organic EL layer 11 is positioned. In order to do this, the groove 13 is formed in the sealing glass 12.

As a method for forming the groove 13 at this time, two methods are largely provided.

First, similar to the general semiconductor imaging process, the photoresist is coated and patterned on the glass 12, and the glass 12 is etched so that the portion without the photoresist film is etched, and then the photoresist is etched. How to strip. These methods include photoresist coating and UV irradiation. There is a problem that complex processes such as development, etching, stripping, etc. must be accompanied, and production efficiency is lowered because the photoresist portion can be easily separated during etching of the glass 12.

In the second method, ultrasonic waves are applied to the abrasive to form the grooves 13 by polishing the surface of the glass 12 with the kinetic energy generated from the abrasive. This method is advantageous for elaborate machining, but it is difficult to apply to the mass production of sealed glass because of the problem of longer tool wear and processing time.

The present invention is to solve the above problems, an object of the present invention is to enable the production of the sealing glass used in the organic electroluminescent display by injection or extrusion molding sealing glass of the organic electroluminescent display quickly and at a lower cost To provide a method to be able to manufacture.

1 is a partially enlarged cross-sectional view schematically showing a typical glass electroluminescent display.

2 is a view schematically showing a state of process equipment for forming a groove in a sealing glass for an organic electroluminescent display according to the present invention.

3 is a flowchart illustrating a manufacturing process of the sealing glass according to the present invention.

4 is a flow chart showing a manufacturing process according to another embodiment of the sealing glass according to the present invention.

5 is a view schematically showing a manufacturing process of a sealing glass according to another embodiment of FIG.

** Description of the symbols for the main parts of the drawings **

10 ... substrate

12 ... sealed glass

13 ... Home

23 ... press roller

S10 ... heating stage

S11 ... Grooving Step

S12 ... cooling stage

In order to achieve the above object, the present invention provides a method for manufacturing a sealed glass of an organic electroluminescent display, the heating step of heating and melting one surface of the glass formed in a predetermined size by heating means, a plurality of the surface of the glass subjected to the heating step The groove forming step of forming a groove by pressing the groove forming means of a predetermined shape, and the cooling step of cooling the molten one surface of the glass by the cooling means after the groove forming step.

Here, the groove forming means is provided with a compression roller having an intaglio in a shape corresponding to the groove on the outer circumference, or a compression plate having a plurality of intaglio corresponding to the groove on the outer surface.

And another method for manufacturing an organic electroluminescent display sealing glass, liquefaction step of melting the glass by heating to a predetermined temperature, liquefying step, pouring the molten glass solution through the liquefaction step into a mold formed grooves of a predetermined shape, Cooling step of curing by curing the glass solution and the mold in the casting step in the casting step, characterized in that the desorption step of detaching the glass cooled in the cooling step in the mold.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the drawings.

The organic electroluminescent display to which the sealing glass according to the present invention is applied has a substrate 10 and an organic EL layer 11 formed of an anode, a cathode, an organic film, and an insulating layer, as shown in FIG. The sealing glass 12 which is provided above the organic EL layer 11 and seals therebetween is provided. The sealing glass 12 is intended to block the organic EL layer 11 to prevent outside air from preventing the organic material from deteriorating when it reacts with water or oxygen.

The sealing glass 12 is bonded to the substrate 10 by being bonded to the substrate 10 with an adhesive 15 or the like in a state where a plurality of grooves 13 are formed on a surface facing the substrate 10. The groove 13 here is formed to secure a space for installing the organic EL layer 11 and the moisture absorbent 14 into the sealing glass 12.

As a facility and an operating state for the formation of the groove 13, as shown in FIGS. 2 and 3, the glass 12 is seated on the conveyor 20, which is a transporting means, and then the heating device 21 is first moved in the conveying direction. Is fitted. The heating device 21 is a heating step (S10) for heating the upper surface of the glass 12 by causing the electric heater coil 22 to be transported in a state where the upper surface of the glass 12 is adjacent to the winding portion (S10). Going through.

What is important in this heating step S10 is that the entire heated glass 12 should not be heated and melted at the same time, but only in the partial heating state where only the upper surface is melted to a predetermined thickness. To this end, the upper surface of the glass 12 must be heated to a high temperature in a short time.

Therefore, the temperature at this time may be changed in consideration of the width, thickness, etc. of the organic electroluminescent display, but the present invention does not specifically limit the time and temperature at this time, but in a few seconds to about hundreds to thousands of degrees. It will be provided, and the depth and the size of the grooves 13 formed according to the difference of this temperature may be implemented differently.

When the heating step S10 is performed, the groove forming step S11 is performed. At this time, the groove forming step (S11) is made by pressing the groove forming means to the upper surface of the heated glass 12, the groove forming means at this time is provided with a pressing roller 23 having the intaglio (23a) is formed. And alternatively, it may be implemented as a pressing plate formed intaglio.

If the use of the pressing roller 23 at this time it is preferable that the glass 12 is used when the state is not cut according to the size of the product, in the case of using a pressing plate, the glass 12 to the size of the product It will be time to be placed in this groove forming step (S11) in the cut state along, but this use is not limited thereto. Therefore, the present invention may be implemented by changing each other. In this case, the glass 12 may be changed depending on the required size and use of the glass 12.

Next, when the groove forming step S11 passes, the process proceeds to the cooling step S12. This cooling step (S12) is a glass in spite of the external small impact because the upper surface of the glass 12, the groove 13 is formed while the heating step (S10) and the groove forming step (S10) is still maintained a very high temperature (12) can be easily modified in shape. Therefore, it is a process for fixing the shape of the glass 12 using the cooling apparatus 24 as soon as possible.

Cooling step (S12) for this may be to cool the upper surface of the glass 12 by flowing the cooling water over the glass 12 through the cooling device 24 or by blowing the cooling air over the glass 12, According to the present invention, if a chamber is provided that maintains the cleanliness of the internal environment, natural cooling may be possible, or other cooling compounds or mixtures may be used.

When the cooling step S12 is performed, the formation of the grooves 13 in the sealing glass 12 is completed, and then the display is produced by bonding the organic electroluminescent display substrate 10 after cutting to an appropriate size. .

Meanwhile. Unlike the embodiment described above, another embodiment, which is somewhat modified, can quickly produce such a sealing glass.

This alternative embodiment first goes through a liquefaction step (S20) of melting the glass 12 and heating it to a predetermined temperature to liquefy. At this time, the liquefaction step (S20) is a step of liquefying by heating the glass in a glass furnace (furnace). At this time, the liquefaction step (S20) is a crucible (25) containing a solid glass material in the furnace inside the furnace After the position in the crucible 25 is heated to melt the glass in the crucible 25.

When the liquefaction step S20 is performed, the glass solution melted in the crucible 25 is poured into a mold mold 26 in which a groove having a predetermined shape is poured, and then the pouring step S21 is performed. After passing through), the glass solution and the mold mold 26 are poured into the mold mold 26 to cure the curing step (S22).

After the cooling step S22 is performed, the sealing glass is manufactured by performing a desorption step S23 for detaching the glass cooled in the cooling step S22 from the mold mold 26.

As described above, the sealing glass of the organic electroluminescent display according to the present invention provides a number of methods for manufacturing the sealing glass at a faster and lower cost.

Therefore, in the process of manufacturing the sealing glass basically, if another embodiment is provided in which the technical gist of cooling the glass after forming a groove by partially or totally heating the glass, they will all be included in the technical scope of the present invention.

The manufacturing method of the sealing glass for an organic electroluminescent display according to the present invention as described above is an injection or manufacturing process that can produce a sealing glass within a lower manufacturing cost and a faster time than the conventional chemical or polishing method By manufacturing by extrusion molding, there is an effect that can improve the manufacturing efficiency of the sealing glass more.

Claims (4)

In the manufacturing method of the sealing glass of an organic electroluminescent display, A heating step of melting one surface of the glass formed with a predetermined size by heating means; A groove forming step of forming a groove by pressing a plurality of predetermined shape groove forming means on one surface of the glass which has undergone the heating step, And a cooling step of cooling the molten one surface of the glass by a cooling means after the groove forming step. The method of manufacturing an organic electroluminescent display sealing glass according to claim 1, wherein the groove forming means is a pressing roller having an intaglio formed in a shape corresponding to the groove on an outer circumference thereof. The method of claim 1, wherein the groove forming means is a pressing plate formed with a plurality of intaglio corresponding to the groove on the outer surface. In the manufacturing method of the organic electroluminescent display sealing glass, A liquefaction step of melting and liquefying the glass by heating to a predetermined temperature; Pouring the molten glass solution through the liquefaction step into a mold having a groove having a predetermined shape; Cooling step of curing by cooling the glass solution and the mold cast in the mold in the pouring step, The method of manufacturing an organic electroluminescent display sealing glass, characterized in that the desorption step of detaching the glass cooled in the cooling step from the mold.