JP2000195675A - Substrate for organic electroluminescence display element and organic electroluminescence display element - Google Patents

Abstract

(57) [Problem] To provide an organic EL display element in which deterioration of an organic EL medium / second electrode line due to moisture, oxygen, or the like is prevented in a simple form. A first electrode line (3) and preferably an auxiliary electrode line (4) are provided on a substrate (2), a negative photoresist film is formed thereon, and then the photoresist film is exposed.
By performing the development, the organic EL display element substrate 1 provided with the frame 6 as well as the partition wall 5 is manufactured. In the organic EL display element, the organic EL medium 8 and the second electrode line 9 are provided on the organic EL display element substrate, the cover 11 is placed on the frame 6, and is surrounded by the frame 6 and the cover 11. The space is decompressed, an adhesive 10 is applied to the outer peripheral surface of the frame 6, and the frame 6 and the cover 11 are bonded.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a substrate for an organic electroluminescent display device, which is a light-emitting display as a television and a terminal display device for advanced information processing, and an organic electroluminescent display device.

[0002] In the following description, "electroluminescence" is referred to as "EL".

[0003]

2. Description of the Related Art An organic EL display device, which is one of flat panel display devices, basically includes an organic EL medium layer having a first electrode (anode or cathode) and a second electrode (anode) provided on the first electrode. (Cathode or anode) and a predetermined current is applied between both electrodes to
The L medium layer emits light. Since the organic EL medium layer is of a self-luminous type, a display using the organic EL medium layer has characteristics of exhibiting high luminance, a high viewing angle, and being driven at a low voltage. Usually, each of the first electrode and the second electrode is composed of a plurality of electrode lines, and the first electrode line and the second electrode line cross each other to form a matrix structure. The organic EL medium layer existing at the intersection of each first electrode line and each second electrode line forms one pixel.

[0004] Having such a matrix electrode structure,
In order to manufacture a large-capacity, high-definition organic EL display device, a very fine patterning process is required for the second electrode line. As a method for finely patterning the second electrode line, a method of using a plurality of partition walls extending apart from each other in a direction intersecting the first electrode line is known (Japanese Patent Application Laid-Open No. H8-31598, Kaihei 9
-102393 publication). Also, by the applicant,
Proposals have been made for a method of using a partition (Japanese Patent Application No. 10-117236, Japanese Patent Application No. 10-24741).
2). Due to the existence of such a partition, the organic EL medium layer and the second electrode line can be patterned simultaneously with the deposition.

In the organic EL display device thus manufactured, if the organic EL medium layer and the second electrode line are left exposed to the atmosphere, they are deteriorated by moisture, oxygen and the like in the atmosphere. In order to prevent the deterioration of the second electrode and the organic EL medium due to such moisture and oxygen, the second electrode line and the organic EL medium layer are sealed with a cover covering the second electrode line and the organic EL medium. Doing has been found to be effective. That is, a cover having an upper box shape or the like covering the second electrode line and the organic EL medium layer is used in a vacuum state or an inert gas atmosphere, and the second electrode line and the organic EL medium are adhered to the substrate. It is a sealed structure.

[0006]

However, several problems can arise with the use of a cover. For one, when placing a cover such as an upper box on a substrate,
There is a possibility that the bottom surface of the wall of the cover is inadvertently brought into direct contact with the second electrode line, damaging the second electrode and the organic EL medium layer, causing a short circuit or poor light emission.

[0007] The cover having an upper box shape or the like is bonded to the substrate by applying an adhesive to the bottom of the wall of the cover facing the front surface of the substrate. Since the adhesive has fluidity, a part of the adhesive may move to and contact the organic EL medium layer or the second electrode line to deteriorate them.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems associated with the use of a cover, and is intended to prevent the second electrode line and the organic EL medium layer from being damaged or deteriorated.
It is an object of the present invention to provide an organic EL display element substrate and an organic EL display element for easily sealing them.

[0009]

In order to solve the problems associated with the use of the cover for sealing the second electrode line and the organic EL medium layer, the present invention provides a frame for mounting the cover. Was formed on the substrate in advance. That is, according to the present invention, an organic electroluminescence display including a plurality of first electrode lines arranged on a substrate and spaced apart from each other and a plurality of partition walls extending apart from each other in a direction intersecting the first electrode lines. An element substrate, wherein a frame surrounding the partition is provided in advance on the substrate.

In this case, it is preferable that the partition and the frame are made of the same photosensitive material.

Further, according to the present invention, there is provided an organic electroluminescent display element comprising an organic electroluminescent medium and a second electrode line provided on a substrate for an organic electroluminescent display element of the present invention. .

Further, in the organic electroluminescent display device of the present invention, a cover for covering an area surrounded by the frame is placed on the frame, and the space surrounded by the cover and the frame is decompressed, and The luminescent medium and the second electrode line are sealed.

Still further, the organic electroluminescent display element of the present invention is characterized in that an adhesive is applied to the outer peripheral surface of the frame, and the cover and the frame are adhered.

According to the present invention, in the region between the substrate edge and the region surrounding the first electrode line on the substrate, a space is provided with the first electrode line, and the frame intersects the frame from the inside of the frame. A substrate for an organic electroluminescent display element, wherein an auxiliary electrode line for connecting to a second electrode line is provided outside the substrate and is apart from each other.

In this case, it is preferable that the auxiliary electrode line is made of the same material as the first electrode line.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment relating to an organic EL display element substrate according to the present invention will be described with reference to FIG.

As shown in FIG. 1, according to the present invention, a plurality of striped first electrode lines are formed on a substrate 2 made of a transparent insulating material such as quartz, glass, plastic or the like, preferably a transparent material. (In this example, an anode line) 3. Further, it is preferable to provide a plurality of stripe-shaped auxiliary electrode lines 4 spaced from the first electrode in a region between the substrate end and a region surrounding the first electrode line. The auxiliary electrode line 4 is formed so as to extend from a region surrounded by a frame 6 described later to cross the outside of the frame 6 and can be used as an electrode for connecting to a second electrode line described later. In FIG. 1, the plurality of first electrode lines 3 are shown as being spaced apart from each other at a fixed interval.
Are shown as extending from a position spaced apart from one side edge of the first electrode on the substrate end side in a direction perpendicular to the first electrode line toward the substrate end and spaced apart from each other. Have been.

The plurality of first electrode lines 3 can be formed by forming an electrode material on the front surface of the substrate 2 and patterning the same by a technique such as ordinary photolithography. Here, preferably, the auxiliary electrode line 4 is formed after the formation of the first electrode line 3. That is, similarly to the first electrode line, an electrode material for an auxiliary electrode is formed on the front surface of the substrate, and this is patterned by a technique such as photolithography. More preferably,
The electrode materials of the first electrode line 3 and the auxiliary electrode line 4 are made the same, and they are formed simultaneously.

In this embodiment, since the first electrode forms the anode as described above, the electrode material is a transparent conductive material, preferably indium tin composite oxide (IT).
O), indium-zinc composite oxide, zinc-aluminum composite oxide and the like can be used. The material of the auxiliary electrode line 4 can be the same as the first electrode material.

These electrode materials can be deposited on the substrate 2 by a sputtering method.

The present invention further includes a plurality of partition walls 5 extending apart from each other in a direction intersecting the plurality of first electrode lines formed on the substrate and a frame 6 surrounding the partition walls 5. The frame 6 is preferably arranged so as to intersect the first electrode line 3 so that the first electrode line 3 extends out of the frame. In the case of the preferred embodiment in which the auxiliary electrode line 4 is formed, the frame 6 is formed so as to intersect with the auxiliary electrode line 4 and extend from the inside of the frame 6 to the outside.

In order to form the partition wall 5 and the frame 6, Japanese Patent Application No.
The method disclosed in Japanese Patent Application No. 0-117236 or Japanese Patent Application No. 10-247412 can be used. That is, first, on the surface (front surface) of the substrate 2 on the first electrode line 3 side,
A negative photoresist film is applied. The negative photoresist film is preliminarily mixed with a material that absorbs light for exposure, particularly ultraviolet light, for example, an ultraviolet absorber or a coloring material. Examples of the ultraviolet absorber to be added to the negative photoresist include organic ultraviolet absorbers such as benzophenone-based, phenylsalicylic acid-based, cyanoacrylate-based, benzotriazole-based, and oxalic anilide-based ultraviolet absorbers which are usually used as ultraviolet absorbers. Alternatively, inorganic ultraviolet absorbers such as glass powder and cerium oxide powder which are usually used as ultraviolet absorbers can be used. As the coloring material, in order to make the partition walls 5 and / or the frame 6 also function as a black stripe, it is desirable to use a black pigment or a mixed pigment of three colors of red, green and blue. Alternatively, a monochromatic pigment can be used only for forming the frame 6. Needless to say, the negative photoresist film is electrically insulating.

After applying a negative type photoresist film containing a light absorbing substance and drying it for a predetermined time, a shape corresponding to the top surface shape of the partition wall 5 and the frame 6 is formed on the surface of the negative type photoresist film. A photomask having a plurality of light transmission windows is placed. Then, a region corresponding to the top surface shape of the partition wall 5 and the frame 6 is selectively exposed by irradiating light for exposure.
Then, the photoresist is exposed up to a certain depth from the surface of the photoresist, but cannot reach the deep portion due to absorption of ultraviolet rays, and the lower portion remains unexposed. When development is performed in this state, the exposed portion remains without being dissolved in the surface layer, but the unexposed portion is removed. Since the lower side of the surface layer is an unexposed portion, the dissolution proceeds from the side to form a forward tapered skirt. In addition, if conditions are selected, it is possible to make the skirt longer than the eaves. In this way, the partition wall 5 and / or the frame 6 having a character-shaped cross section can be formed.

According to the above-mentioned method, the plurality of partition walls 5 and one frame 6 can be simultaneously formed of the same material. Although the formation of the partition walls 5 and / or the formation of the frame 6 can be made of different materials or can be performed separately with the same material, it is preferable to simultaneously perform the same material as described above.

In forming the partition walls and the frame, in addition to the above-mentioned method or instead of the above-mentioned method, a method known in the art or a combination thereof is adopted.
Each part of the partition wall 5 and / or the frame 6 can be formed into various shapes. In FIG. 1, the plurality of partition walls 5 are shown as having a character-shaped cross section, while the frame 6 is shown as having a vertical side surface. In FIG. 1, the partition walls 5 are shown as extending apart from each other in a direction perpendicular to the first electrode lines, and the frame 6 has a square shape orthogonal to and intersecting each first electrode and each auxiliary electrode. It is shown as being.

The frame 6 and the partition walls 5 are post-baked after being irradiated with an electron beam to complete the substrate for an organic EL display element of the present invention. Here, the final height of the partition wall 5 and the frame 6 is preferably 1 to 10 μm.

Next, referring to FIG. 2, the organic EL of the present invention will be described.
Embodiments relating to a display element will be described.

FIG. 2 is a schematic sectional view for explaining an embodiment of the organic EL display element according to the present invention.

The organic electroluminescent display device provided by the present invention uses the above-mentioned substrate for an organic EL display device.

In the present invention, the organic EL medium 8 is provided at least between the partition walls. The organic EL medium can be formed of a single-layer film containing a fluorescent substance or a multilayer film as known in the art.

The organic EL medium having a multilayer structure has a two-layer structure comprising a hole injecting and transporting layer and an electron transporting light emitting layer or a hole injecting and transporting layer and an electron transporting layer. A three-layer structure including an electron transport layer can be employed. The organic EL medium can be formed in even more layers, and each layer is sequentially formed on a substrate.

The hole injecting and transporting material is copper phthalocyanine,
Metal phthalocyanines such as tetra (t-butyl) copper phthalocyanine, metal-free phthalocyanines, quinacridone compounds, 1,1-bis (4-di-p-tolylaminophenyl) cyclohexane, N, N'-diphenyl-N, N '
-Bis (3-methylphenyl) -1,1'-biphenyl-4,4'-diamine, N, N'-di (1-naphthyl)
-N, N'-diphenyl-1,1'-biphenyl-4,
Aromatic amine-based low molecular hole injecting and transporting materials such as 4'-diamine, high molecular hole transporting materials such as poly (p-phenylenevinylene) and polyaniline, polythiophene oligomer materials, and other known hole transporting materials. You can choose from.

As the light emitting material, 9,10-diarylanthracene derivatives, pyrene, coronene, perylene, rubrene, 1,1,4,4-tetraphenylbutadiene,
Tris (8-quinolinolate) aluminum complex, tris (4-methyl-8-quinolinolate) aluminum complex, bis (8-quinolinolate) zinc complex, tris (4
-Methyl-5-trifluoromethyl-8-quinolinolate) aluminum complex, tris (4-methyl-5-cyano-8-quinolinolate) aluminum complex, bis (2
-Methyl-5-trifluoromethyl-8-quinolinolate) [4- (4-cyanophenyl) phenolate] aluminum complex, bis (2-methyl-5-cyano-8-quinolinolate) [4- (4-cyanophenyl) Phenolate] aluminum complex, tris (8-quinolinolato) scandium complex, bis [8- (p-tosyl) aminoquinoline] zinc complex and cadmium complex, 1,2,2
3,4-tetraphenylcyclopentadiene, pentaphenylcyclopentadiene, poly-2,5-diheptyloxy-p-phenylenevinylene, coumarin-based phosphor,
Perylene phosphor, pyran phosphor, anthrone phosphor, porphyrin phosphor, quinacridone phosphor,
N, N′-dialkyl-substituted quinacridone-based phosphors, naphthalimide-based phosphors, N, N′-diaryl-substituted pyrrolopyrrole-based phosphors, and the like can be used alone or in other low-molecular or high-molecular-weight polymers. Can be used as a mixture.

As the organic electron transporting material, 2- (4-bifinylyl) -5- (4-t-butylphenyl)-
1,3,4-oxadiazole, 2,5-bis (1-naphthyl) -1,3,4-oxadiazole, and oxadiazole derivatives synthesized by Hamada et al. (Journal of the Chemical Society of Japan,
1540, 1991) and bis (10-hydroxybenzo [h] quinolinolate) beryllium complex,
Examples thereof include a triazole compound disclosed in -90260.

The organic EL medium 8 can be formed by a vacuum evaporation method, and its thickness is preferably 1 μm or less, more preferably 50 to 150 nm, in either case of a single layer or a multilayer. . The organic EL medium 8 is also patterned at the same time as the vapor deposition due to the presence of the partition walls.

In the present invention, the second electrode line 9 is provided at least on the organic EL medium layer formed between the partition walls. In the case where the auxiliary electrode line 4 of the preferred embodiment is formed, the auxiliary electrode line 4 can be connected to the second electrode line. Here, since the first electrode line is an anode, the second electrode line is a cathode.

As the cathode material, a substance having a high electron injection efficiency is used. Specifically, a single metal such as magnesium (Mg), aluminum (Al), or ytterbium (Yb) is used, or a compound such as lithium, lithium oxide, or lithium fluoride is sandwiched by about 1 nm at an interface in contact with an organic EL medium. In this case, aluminum or copper having high stability and high conductivity is laminated and used.

Alternatively, in order to achieve both electron injection efficiency and stability, a metal having a low work function (eg, Li, Mg, Ca, Sr, La, Ce, Er, E
u, Sc, Y, Yb, etc.) and one or more stable metals (eg, Ag, Al, Cu, etc.), for example, Mg / Ag alloy, Al / Li alloy, Cu / Li alloy or the like can be used.

The cathode can be formed by a resistance heating evaporation method, an electron beam evaporation method, a reactive evaporation method, an ion plating method, or a sputtering method, depending on the material. The thickness of the cathode is desirably about 10 nm to 1 μm. The second electrode line, which is a cathode here, is also patterned simultaneously with the deposition by the presence of the partition wall 5.

In the present invention, the frame 6 formed on the substrate is provided.
The cover 11 is placed on the.

The cover 11 covers at least the top surface of the frame 6 and a region surrounded by the frame, and preferably has a portion extending outside the outer edge of the top surface of the frame 6.

In the substrate for an organic EL display element of the present invention, since a frame is previously formed on the substrate, the second electrode line and the organic EL display element can be easily formed simply by placing a flat cover, for example. Can be covered. In addition, due to the presence of the frame formed in advance, it is possible to avoid the possibility that the cover is erroneously brought into contact with the second electrode when the cover is placed.

In FIG. 2, the cover 11 has a flat plate shape, and has a portion extending outside the outer edge of the top surface of the frame 6 over the entire periphery, although not clearly shown. ing.

As a material for the cover, a material such as glass or metal can be used.

In the present invention, the frame 6 and the cover 11
An organic EL display element in which the space surrounded by is reduced in pressure is provided. By reducing the pressure, moisture and oxygen remaining in the space surrounded by the frame, the cover, and the substrate can be reduced, and the deterioration of the second electrode line 9 and the organic EL medium 8 can be suppressed. After decompression, an inert gas can be sealed.

The frame 6 and the cover 11 are bonded by an adhesive. In particular, the outermost surface of the frame is most desirable as a place where the adhesive is applied. In other words, by setting the place where the adhesive is applied to the outer peripheral surface of the frame 6, the adhesive cannot flow into the area inside the frame 6, and therefore ensures that the adhesive comes into contact with the second electrode and the organic EL medium. Can be prevented. In a preferred embodiment in which the cover 11 has a portion that extends slightly outward from the outer edge of the top surface of the frame 6, the cover edge that faces outward from the outer edge of the top surface of the frame 6 faces the front surface of the substrate. Since a region surrounded by the front surface of the substrate facing the rear surface, the outer peripheral surface of the frame 6 and the rear surface of the cover outside the frame 6 is formed, the adhesive is applied to this region to apply the adhesive to the inner region of the frame 6. And the substrate 2, the frame 6 and the cover 11 can be integrally bonded. Although not clearly shown in FIG. 2, the adhesive is shown as being applied over the entire outer peripheral surface of the frame 6.

As the adhesive, a normal room temperature-curable resin may be used, but an ultraviolet curable resin having a high curing speed can be preferably used for efficient adhesion.

[0048]

EXAMPLE 1 With reference to FIG. 1, a substrate for an organic EL display element was manufactured according to an embodiment of the present invention.

First, an ITO layer was formed on the glass substrate 2 to a thickness of 0.1 μm by sputtering. Further, in order to improve transparency and conductivity, a heat treatment was performed in air at 230 ° C. for 1 hour to crystallize the ITO.

Next, the ITO layer is patterned by photolithography and wet etching.
A plurality of first electrode lines 3 and a plurality of auxiliary electrode lines 4 as described above were formed. The width of each first electrode line 3 is 200
μm, and the interval was 50 μm. On the other hand, the width of each auxiliary electrode line 4 was 200 μm, and the interval was 50 μm.

A negative type photoresist in which a black material made of fine-particle graphite was dispersed was applied thereon, and was prebaked.

Then, a region corresponding to the top of the partition 5 and a region corresponding to the top of the frame 6 were exposed by performing ultraviolet exposure using a photomask.

Then, a plurality of partitions 5 and frames 6 were formed as shown in FIG. 1 by developing with an alkali developing solution.

After the whole surface of the partition wall 5 and the frame 6 is irradiated with an electron beam, it is heated at 150 to 300.degree.
After post-baking for 0 minutes, the organic EL display element substrate 7
Was completed. The final height of the partition 5 and the frame 6 is as follows.
4.5 μm, and frame 6 was 5 μm.

Example 2 In this example, an organic EL display element was manufactured using the substrate for an organic EL display element manufactured in Example 1 according to the embodiment described with reference to FIG.

With respect to the organic EL display device substrate prepared in Example 1, copper phthalocyanine, N, N′-di (1-naphthyl) -N, N′-diphenyl-1,1′-biphenyl-4, 4′-diamine and tris (8-quinolinolato) aluminum complex were coated at a film thickness of 20 nm and 60 n, respectively.
organic EL medium 8
Was formed.

Next, while rotating the glass substrate 2,
The second electrode line 9 was formed by vacuum-depositing an Mg / Ag alloy. The thickness of the second electrode line 9 was 0.2 μm.

Finally, the glass cover 11 is placed on the frame 6, and the space surrounded by the substrate for the organic EL display element, the frame 6 and the glass cover 11 is decompressed. The organic EL display element 7 was completed by coating and bonding the glass cover 11.

The initial luminance of the organic EL display element is 30
It was 0 cd / m ² , and the half-life was 5,000 hours, which is an extremely excellent characteristic. Therefore, the residual moisture and oxygen could be reduced by reducing the pressure, and the deterioration could be suppressed. Also,
Since the frame was formed in advance, it was possible to reliably prevent the adhesive from flowing b and coming into contact with the second electrode and the organic EL medium without bringing the cover into contact with the second electrode or the like.

Example 3 In this example, an organic EL medium and a second electrode were prepared in the same manner as in Example 2 using the substrate for an organic EL display element according to Example 1, and a glass cover was placed. The space surrounded by the organic EL display element substrate, frame, and glass cover was depressurized.

Thereafter, argon gas was sealed in the reduced pressure space, an adhesive was applied to the outer peripheral surface of the frame, and a glass cover was adhered to complete an organic EL display element.

The initial luminance of the organic EL display element is 30
It was 0 cd / m ² , and the half life was excellent at 4000 hours. Therefore, residual moisture and oxygen could be reduced by reducing the pressure, and deterioration could be suppressed. Also, as in the second embodiment, since the frame is formed in advance, it is ensured that the cover does not come into contact with the second electrode and the like, and that the adhesive flows and comes into contact with the second electrode and the organic EL medium. Could be prevented.

Embodiment 4 This embodiment is the same as Embodiments 2 and 3, except that the space surrounded by the organic EL display element substrate, frame and glass cover is not decompressed or filled with an inert gas. An organic EL display element was manufactured.

The initial luminance of the obtained organic EL display element is as follows:
It was 300 cd / m 2, which was the same value as in Examples 2 and 3. However, compared with the devices of Examples 2 and 3, the area of the non-light emitting portion was increased, and deterioration could not be suppressed.

[0065]

As described above, according to the present invention, the organic EL display element substrate is provided with the partition wall and the frame in advance, so that the cover can be placed on the frame to achieve the second structure. The electrode line and the organic EL medium can be covered. Also, since the frame is provided on the substrate in advance, when placing the cover,
The cover can be prevented from contacting the second electrode line.
Furthermore, since the pressure in the space surrounded by the frame and the cover is reduced, residual moisture, oxygen, and the like can be reduced, and deterioration of the second electrode line and the organic EL medium can be suppressed. Furthermore, by setting the application location of the adhesive for bonding the cover to the outer peripheral surface of the frame, the adhesive cannot flow into the inside of the frame, and the contact between the adhesive and the second electrode line or the organic EL medium is prevented. It can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating an embodiment of an organic EL display element substrate according to the present invention.

FIG. 2 is a schematic sectional view for explaining an embodiment of the organic EL display element of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Substrate for organic EL display element 2 ... Substrate 3 ... 1st electrode line 4 ... Auxiliary electrode line 5 ... Partition 6 ... Frame 7 ... Organic EL display element 8 ... Organic EL medium 9 ... 2nd electrode line 10 ... Adhesive 11 …cover

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Takao Minato 1-5-1, Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd. F-term (reference) 3K007 AB00 AB12 AB13 AB18 BA06 BB01 BB04 CA01 CA02 CA05 CB01 DA00 DB03 EB00 FA01 FA03

Claims (7)

[Claims] 1. A cover, comprising: a plurality of first electrode lines arranged on a substrate so as to be spaced apart from each other; and a plurality of partition walls extending apart from each other in a direction intersecting with the first electrode lines. A substrate for an organic electroluminescent display element, wherein a frame for mounting is provided. 2. The substrate for an organic electroluminescent display device according to claim 1, wherein the partition and the frame are made of the same photosensitive material. 3. An organic electroluminescent display element comprising an organic electroluminescent medium and a second electrode line provided on the substrate for an organic electroluminescent display element according to claim 1. 4. An area on the substrate between the substrate edge and an area surrounding the first electrode line, spaced from the first electrode line, intersecting the frame from the inside of the frame, and separating from the outside of the frame. 3. An auxiliary electrode line for connecting to a second electrode line, the auxiliary electrode line extending to extend.
The substrate for an organic electroluminescence display element according to the above. 5. The substrate for an organic electroluminescent display device according to claim 4, wherein the auxiliary electrode line is made of the same material as the first electrode line. 6. A cover for covering an area surrounded by the frame is placed on the frame, the space surrounded by the cover and the frame is decompressed, and the organic electroluminescence medium and the second electrode line are sealed. The organic electroluminescent display element according to claim 3, wherein the organic electroluminescent display element is stopped. 7. The organic electroluminescent display element according to claim 6, wherein an adhesive is applied to an outer peripheral surface of the frame, and the frame and the cover are adhered.