KR100590244B1 - Organic electro luminescent device assembly and method for assembling thereof - Google Patents

Abstract

The present invention is to prevent the degradation of the organic electroluminescent device (O ₂ , H ₂ 0) due to the organic EL device assembly and assembly method to achieve the long life of the organic light emitting device device by preventing performance degradation According to the present invention, a moisture-proofing agent is formed inside a sealing line of an assembled substrate formed by assembling a sealing substrate and a mother substrate by forming a mother substrate on which an organic electroluminescent device is formed and a sealing substrate on which a sealing line is formed. Although the shape of the organic electroluminescent device is changed by injecting and cutting the same, the organic electroluminescent device can be cut according to the changed shape, thereby significantly reducing volume and weight compared to using a metal can. It has various effects in various aspects such as unnecessary jig for use. .

Organic EL, moistureproof

Description

Organic electroluminescent device assembly and method for assembling thereof

1A is a partially enlarged perspective view of an organic electroluminescent device according to the present invention;

FIG. 1B is a conceptual diagram illustrating the formation of an organic electroluminescent device by forming a protective film on an upper surface of the organic electroluminescent device of FIG.

2 is an external perspective view of an organic electroluminescent device.

Figure 3 is an external perspective view showing a sealing substrate formed with a seal line according to the present invention.

Figure 4 is an exploded perspective view showing the assembly of the mother substrate and the sealing substrate to form an assembled substrate in accordance with the present invention.

5 is a plan view of the assembled substrate assembled in accordance with the present invention.

FIG. 6 is a plan view illustrating a group of organic electroluminescent device unit cells formed by cutting a plurality of assembled substrates according to the present invention; FIG.

7 is a conceptual diagram illustrating the injection of a desiccant into the organic electroluminescent device unit cell group according to the present invention.

8 is a conceptual view showing that the inlet is sealed after injecting a desiccant into the organic electroluminescent device unit cell group according to the present invention.

9 is an external perspective view of an organic electroluminescent device assembly assembled by assembling the organic electroluminescent device panel assembled by FIGS. 1A to 8;

The present invention relates to the field of displays, and more particularly, to prevent degradation of organic eletroluminescent devices due to O ₂ , H ₂ 0 and deterioration thereof, thereby achieving long life of the organic electroluminescent device. The present invention relates to an organic light emitting device assembly and an assembly method.

Recently, due to the development of the electric and electronic industry, the development of information processing devices that process massive data in a short time is rapidly progressing. Recently, with the development of information processing devices, users can recognize the data processed by the information processing devices. The development of a display device, which is a kind of interface device, is being progressed together.

As such, a display device that is being developed in parallel with an information processing device is typically a CRT (Cathod Ray Tube) type display device and a liquid crystal display device.

However, the CRT display device of such display devices is mainly fixed display device due to the disadvantage that it is almost impossible to carry due to its large weight and volume despite various advantages such as high resolution, free resolution change by software, and low price compared to screen size. Mainly used as

On the other hand, the liquid crystal display device, which has been rapidly developed recently, has a significantly smaller weight and volume than the CRT display device, and is easily used for portable use such as a portable computer and a portable communication device. Due to the passive element, there is a fatal disadvantage that the display is not implemented in a dark place, and a structure and a manufacturing method are complicated because a separate light source for display is required to overcome this problem, thereby increasing unnecessary volume and weight.

In addition, in order to drive a passive device in an optimal state to obtain a desired image, a very complex configuration, for example, a thin film transistor (TFT) must be manufactured very precisely by a semiconductor thin film process, and a TFT is precisely manufactured. By having a very complicated driving mechanism for controlling, the manufacturing time and manufacturing cost of the liquid crystal display device are excessively increased, and there are various problems in which its spread is not smooth.

Recently, compared to a liquid crystal display device having a number of advantages over a CRT display device, the active light emitting element does not require a light source, and thus has a reduced volume and weight compared to a liquid crystal display device, and has a much higher structure than a TFT. By employing a simple thin film diode, an organic electroluminescent device has been developed, which has a very low manufacturing time and a manufacturing cost, and has a simple driving mechanism compared to a liquid crystal display device.

In the organic electroluminescent device having such an advantage, a transparent anode electrode and an insulating film of ITO (Indum Tin Oxide) material are sequentially formed on the upper surface of the transparent substrate, and then a pixel (pixcel) is formed in the upper portion of the insulating film. After opening the anode electrode, a polymer or a low molecular organic electroluminensent layer which emits light by the combination of electrons and holes in the opened portion is formed by vacuum thermal evaporation or spin coating, and the upper portion of the organic electroluminescent layer It is realized by forming a metal conductive layer serving as a cathode electrode in the cathode separator.

The organic electroluminescent layer of such an organic electroluminescent device is deteriorated by moisture and oxygen decisively and promotes the growth of dark spots, thereby causing the generation of pixels that can no longer emit light, thereby making sure that the organic electroluminescent layer The light emitting layer must be isolated from moisture and oxygen.

In order to overcome the drawbacks of the organic electroluminescent device as described above, a method of mounting a metal can using a hygroscopic agent such as barium oxide (BaO) on a substrate backside of the organic electroluminescent device has recently been developed. have.

However, when the organic electroluminescent device is isolated from oxygen and moisture by the metal can, the metal can must be manufactured separately according to the size of the organic electroluminescent device, that is, there is no compatibility between the organic electroluminescent device and the metal can, When the shape of the organic light emitting device is changed, the shape of the metal can also has a problem that must be changed according to the change of the organic light emitting device.

In addition, in order to couple the metal can to the organic light emitting device, a jig for temporarily fixing the metal can is required. If the shape of the organic can is changed and the shape of the metal can is changed, the jig may also be used. There is a problem that needs to be changed.

In addition, since the metal can is coupled to the rear surface of the organic electroluminescent device, the overall volume and weight of the organic electroluminescent device are increased, so that the organic electroluminescent device cannot be stored in a narrow space.

Accordingly, the present invention contemplates such conventional problems, and an object of the present invention is to provide a means for preventing the organic electroluminescent device from contacting with moisture and oxygen without being affected by the shape change of the organic electroluminescent device. The organic electroluminescent device is isolated from moisture and oxygen.

Another object of the invention is to minimize the volume and weight of the means for isolating the organic electroluminescent device from moisture and oxygen such that the overall volume and weight of the organic electroluminescent device is reduced.

Still other objects of the present invention will become more apparent from the following detailed description of the present invention.

The organic electroluminescent device assembly according to the present invention for realizing the object of the present invention comprises a first substrate formed with an organic electroluminescent device having a first deterioration preventing means formed on the upper surface, and a portion of the organic electroluminescent device when overlapping with the first substrate A second substrate on which the first sealing means is formed to isolate the organic electroluminescent device from the outside in the form of a broken line so as to form a space in which the second degradation preventing means is to be received; And a second sealing means for preventing the second deterioration preventing means from flowing out.

In addition, the method for assembling an organic electroluminescent device according to the present invention for realizing the object of the present invention forms an organic electroluminescent device having a first deterioration preventing means formed on a first substrate, and wraps around the organic electroluminescent device. An assembling substrate assembly step of assembling the second substrate having the first sealing means for opening to be aligned with the organic electroluminescent device formed on the first substrate, and preventing the second deterioration in the sealing space formed by the sealing means through the opening; Injecting the means and sealing the opening with the second sealing means to prevent the second deterioration preventing means from flowing into the opening.

Hereinafter, an organic electroluminescent device assembly and an assembly method according to the present invention will be described with reference to the accompanying drawings.

1A to 8 show an assembly method of an organic electroluminescent device assembly according to the present invention, and FIG. 9 shows an organic electroluminescent device assembly according to the present invention.

In FIG. 1A, an organic electroluminescent device 200 which is a part of an organic electroluminescent device formed by a semiconductor manufacturing process in a matrix form on a mother substrate 100 which is a transparent substrate having a predetermined size, for example, a glass substrate, is illustrated. A partial cross-sectional perspective view of the cross-sectional perspective view is shown in detail, which shows the laminated structure of the organic electroluminescent device 200 in detail.

The organic electroluminescent device 200 deposits an ITO thin film 210 having a predetermined thickness on the front surface of the mother substrate 100, and the ITO thin film 210 is predetermined in plural number in parallel with the X axis defined in FIG. 1A. Etching is performed using a pattern mask (not shown) to have a rod shape having a spacing. At this time, the number of the patterned ITO thin film 210 depends on the preset resolution.

The ITO thin film 210 formed as described above serves as an electrode, and thus, the formed ITO thin film 210 will be defined as an “anode electrode” hereinafter, and the reference numeral 210 will be given.

The insulating film 220 is again deposited on the upper surface of the anode electrode 210 to a predetermined thickness over the entire surface of the mother substrate 100. The insulating film 220 is electrically shorted with the other portion of the anode electrode 210. Serves to prevent this from happening.

A portion of the upper surface of the insulating film 220 which serves as described above is to be formed with, for example, 640 × 480 × 3, 800 × 600 × 3, and 1024 × 768 × 3. The openings are formed in the form of a matrix corresponding to the resolution.

As described above, the anode electrode 210 is opened and exposed to the upper surface of the anode electrode 210 in one embodiment the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer sequentially by the vacuum thermal evaporator organic electroluminescent layer 230 ) Is formed.

The cathode electrode 240 is formed on the upper surface of the organic electroluminescent layer 230 by a material such as aluminum to be orthogonal to the Y axis direction, that is, the X axis direction shown in FIG. 1A.

In this case, in order to prevent one of the cathode electrodes 240 from being connected to the adjacent cathode electrode 250, a predetermined thickness may be provided on an upper surface of the insulation film 220 corresponding to the cathode electrode 240 and the cathode electrode 250. The photoresist having a is formed in a rod shape having an inverse taper shape, which will be defined as a cathode separator (260).

As described above, the metal thin film is deposited by a metal process such as sputtering over the entire surface of the mother substrate 100 in the state where the cathode separator 260 is formed.

In this case, the cathode separator 260 prevents the arbitrary cathode electrode 240 and the adjacent cathode electrode 250 from being shorted with each other as the metal process proceeds.

The organic electroluminescent device 200 manufactured through such a process is then subjected to an assembly process for minimizing damage caused by moisture and oxygen.

The assembly process of the organic electroluminescent device 200 starts with the protective film forming process of covering the entire organic electroluminescent device 200 with a thin passivation film 270 as shown in FIG. 1B.

Covering the organic electroluminescent device 200 with the protective film 270 may have an indirect effect of protecting the organic electroluminescent device 200 from external shock, but when the assembly process is performed in the air, the organic electroluminescent device 200 This is to prevent the light emitting device 200 from being damaged by moisture and oxygen contained in the air.

In other words, once the protective film is formed on the organic electroluminescent device 200, it is not necessary to proceed with the assembly process in a vacuum chamber, a special environment in which moisture and oxygen have been removed, and therefore, equipment and manufacturing time required for manufacturing the organic electroluminescent device assembly. You can expect a shortening.

Hereinafter, the organic electroluminescent device 200 and the protective film 270 will be defined as the organic electroluminescent device 300.

Hereinafter, a process of fabricating the organic electroluminescent device 300 by forming the passivation layer 270 on the organic electroluminescent device 200 will be described in more detail.

First, as illustrated in FIG. 1B, a deposition mask 400 having a portion corresponding to the organic electroluminescent device 200 is opened on an upper surface of the mother substrate 100 in which the plurality of organic electroluminescent devices 200 are formed in a matrix form. The protective film 270 is formed to a predetermined thickness on the entire organic electroluminescent device 200 in a state in which the organic electroluminescent device 200 is aligned with the organic electroluminescent device 200.

In this case, as the protective film material, inorganic materials such as SiO ₂ , Si ₃ N ₄ , Al ₂ O ₃ , and the like, are preferably formed by sputtering, thermal evaporation, or electron beam evaporation. It is sufficient to have a thickness of 5 μm or more on the entire surface of the 200.

An organic electroluminescent device 300 having a protective film 270 formed by such a material and method is shown in FIG. 2.

Subsequently, the mother substrate 100 on which the organic electroluminescent device 300 formed by being deposited to the protective film 270 is formed is overlapped with the encapsulation substrate 500 illustrated in FIG. 3, and then assembled to form an organic electric field as illustrated in FIG. 5. The light emitting device assembly substrate 600 is manufactured.

More specifically, the sealing substrate 500 has a thickness of about 1.1 mm or less, and serves to seal the organic electroluminescent device 300 formed on the mother substrate 100 to the outside. As shown in FIG. 3, a seal line 510 having a shape for sealing the organic electroluminescent device 300 is formed on one side of 500.

In this case, when the UV curing agent is used as the material constituting the seal line 510, the sealing substrate 500 may use a transparent substrate to transmit ultraviolet rays for curing the UV curing agent, and may use an opaque substrate.

At this time, the seal line 510 is a spacer having a diameter of several tens of micrometers so that a predetermined gap is maintained between the top surface of the organic electroluminescent device 300 and the sealing substrate 500, and in one embodiment, the thermosetting resin and UV curing. Resin etc. are formed by the sealant mixed in an appropriate ratio.

In order to form the seal line 510 using such a sealant, a sealant is applied to the sealing substrate 500 through the opening in a state in which the portion where the seal line 510 is to be formed is selectively opened 515. It is possible to use an in-screen printing method or a method using a dispenser such that the seal line 510 is formed by squeezing the sealant.

In this case, the shape of the seal line 510 may have a shape surrounding the organic electroluminescent device 300 in a line shape having a predetermined thickness from a position spaced apart from the organic electroluminescent device 300 by a predetermined distance. Make two places open.

At this time, the opening 515 is a desiccant inlet that serves to introduce the desiccant 700 to be described later in FIG.

As such, the encapsulation substrate 500 on which the seal line 510 is formed and the mother substrate 100 on which the organic electroluminescent device 300 is formed are assembled to overlap each other in an aligned state as illustrated in FIG. 4. The state in which the 500 and the mother substrate 100 are assembled will be defined as an "assembly substrate" 600.

Subsequently, when the sealant constituting the seal line 510 of the assembled substrate 600 is a thermosetting resin, curing is performed by applying appropriate heat and pressure, and when the sealant constituting the seal line includes a UV curing agent, Ultraviolet rays for curing the UV curing agent are irradiated and curing proceeds.

Between the mother substrate 100 and the sealing substrate 500 of the assembled substrate 600 there is a plurality of organic electroluminescent device 300 arranged in a matrix form, bar seal line 510 is included Each organic electroluminescent device 300 will be defined as an " organic electroluminescent device unit "

Thereafter, the organic electroluminescent device unit cell 800 is singulated after a subsequent process to form the organic electroluminescent device panel 900.

In order to proceed to the organic electroluminescent device unit cell 800 defined as described above and fabricate the organic electroluminescent device assembly 1000, a plurality of organic electroluminescent device unit cells 800 formed on the assembled substrate 600 are illustrated. As shown in Fig. 5, it is preferable to subdivide again into an appropriate number.

As such, the organic electroluminescent device unit cells 800 formed on the assembled substrate 600 are divided into appropriate numbers as shown in FIG. 6 by the seal line 510 of each organic electroluminescent device unit cell 800. This is to inject the desiccant 700 through the process of FIGS. 7 and 8 into the formed space.

Hereinafter, an organic electroluminescent device unit cell 800 divided into an appropriate number as shown in FIG. 6 will be defined as an "organic electroluminescent device unit cell group" 850.

According to the present invention, the desiccant injection holes 515 of each organic electroluminescent device unit cell 800 formed in the organic electroluminescent device unit cell group 850 are cut to have the same direction.

At this time, in order to cut the organic electroluminescent device unit cell group 850 from the assembled substrate 600, for example, a cutting groove is formed in a scribe line which is a portion to be cut by rotating a diamond blade provided on a circumferential surface at high speed. After cutting by applying a weak impact to the assembled substrate 600, or by rapidly heating the portion to be cut with a laser to locally expand the assembled substrate 600, and then cut by rapid cooling the locally expanded portion with a low temperature cooling fluid This is possible by causing an internal stress to be generated at a portion greater than the molecular bonding force of the amorphous glass.

Thereafter, the cut organic electroluminescent device unit cell group 850 is introduced into the vacuum chamber 720 including the tray 710 in which the desiccant 700 is contained, as shown in FIG. 7, and then the inside of the vacuum chamber 720 is opened. By making it in a vacuum state, the desiccant 700 may be injected into the seal line 510 by the pressure difference.

In this case, the desiccant 700 may include a silicone oil having a proper viscosity (Si Oil), a moisture absorbent such as barium oxide (BaO), calcium oxide (CaO) in the silicone oil.

Thereafter, in order to prevent the desiccant 700 from flowing out of the organic electroluminescent device unit cell group 850 into which the desiccant 700 is injected, the desiccant injection hole 515 is provided with a UV curing agent 860 as shown in FIG. 8. Once again injected, ultraviolet radiation is applied to the UV curing agent 860 causes the desiccant 700 to be sealed inside the seal line 510.

Subsequently, as shown in FIGS. 8 and 9, the organic electroluminescent device unit cell group 850 is singulated. Each piece obtained by singulating the organic electroluminescent device unit cell group 850 is described below. Organic electroluminescent device panel "900 will be defined.

The organic electroluminescent device panel 900 which has undergone such a manufacturing process performs a finishing process, for example, edge rounding an edge portion which is easily damaged by an external impact.

As shown in FIG. 9, the organic electroluminescent device panel 900 fabricated by terminating the above process is flexibly used for input and output of driving signals for driving the organic electroluminescent device panel 900 to the anode electrode and the cathode electrode. Fabrication of the organic electroluminescent device assembly 100 is terminated by attaching the printed circuits 910 and 920.

As described above in detail, a mother substrate on which the organic electroluminescent device is formed and a sealing substrate on which a sealing line is formed are formed, and a desiccant is injected into the seal line of the assembled substrate formed by assembling the sealing substrate and the mother substrate. And, even if the shape of the organic electroluminescent device is changed through the cutting process, by cutting the organic electroluminescent device according to the changed shape, the volume and weight can be significantly reduced compared to the use of the metal can. It has various effects in various aspects such as unnecessary jig for.

Claims (8)

A first substrate having an organic electroluminescent device having a first deterioration preventing means formed thereon; A second substrate on which the first sealing means is formed so that the organic electroluminescent device is separated from the outside in the form of an open line when the first substrate overlaps with the first substrate so as to form a space for accommodating the second degradation preventing means; Second deterioration preventing means injected into the space through the opening; And second sealing means for preventing the second deterioration preventing means from leaking out. The method of claim 1, wherein the first deterioration prevention means An organic electroluminescent device assembly, wherein the organic electroluminescent device is a protective film composed of an inorganic material of SiO ₂ , Si ₃ N ₄ , or Al ₂ O ₃ to isolate the organic electroluminescent device from moisture and oxygen. The method of claim 1, wherein the second deterioration preventing means An organic electroluminescent device assembly, which is a silicone oil having a certain viscosity, a silicone oil containing a moisture absorbent. The organic electroluminescent device according to claim 1, wherein the first sealing means is a sealant composed of a spacer having a predetermined diameter and a cured material cured by a predetermined magnetic pole, and the second sealing means is a cured material cured by a predetermined magnetic pole. assembly. 5. The organic electroluminescent device assembly of claim 4, wherein the stimulus is any one of heat, temperature, pressure, ultraviolet light. Forming an organic electroluminescent device having a first deterioration preventing means formed on a first substrate; An assembling substrate assembly step of assembling a second substrate having a first sealing means formed around the organic electroluminescent device and opening only a portion thereof in alignment with the organic electroluminescent device formed on the first substrate; Injecting a second deterioration preventing means into the sealing space formed by the sealing means through the opening; Sealing the opening with a second sealing means to prevent the second deterioration preventing means from flowing into the opening. 7. The organic electroluminescent device assembly of claim 6, wherein a plurality of organic electroluminescent devices are arranged in a matrix form on the first substrate, and the first sealing means is formed corresponding to the organic electroluminescent device on the second substrate. Assembly method. 8. The method of claim 7, further comprising cutting at least two or more of said organic electroluminescent devices into a group after said assembling substrate assembly step.

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