JPH0737686A - El panel and manufacture thereof - Google Patents

Abstract

PURPOSE:To prevent the infiltration of moisture and prevent the speed of dielectric breakdown. CONSTITUTION:An EL structure 30 laminated with a lower electrode 23, a lower insulator layer 24, an EL luminescence layer 25, an upper insulator layer 26, and an upper electrode 27 in this order is formed on the surface 22a of a translucent substrate 22, and a porous member 28 is arranged on it. The EL structure 30 and the porous member 28 are covered with a moisture-proof member 29. The infiltration of moisture is prevented, a molten electrode material generated at the time of dielectric breakdown is diffused in voids 28a of the porous member 28, the spread of dielectric breakdown is prevented, and the deterioration of the rated characteristic is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an EL (electroluminescent) panel used as a display means for OA (office automation) equipment, FA (factory automation) equipment and the like, and a method for manufacturing the same.

[0002]

2. Description of the Related Art An EL panel is a self-luminous type and a completely solid type, and is expected to be used in various fields as a thin and highly reliable display means.

FIG. 5 shows an EL panel 1 which is a first conventional example.
3 is a cross-sectional view showing the configuration of FIG. An EL structure 11 in which, for example, a lower electrode 3, a lower insulating layer 4, an EL light emitting layer 5, an upper insulating layer 6 and an upper electrode 7 are laminated in this order is formed on a transparent substrate 2 made of glass, for example. To be done. The lower electrode 3 made of, for example, ITO (Indium Tin Oxide) and the upper electrode 7 made of, for example, Al are both formed in a strip shape and are formed in directions orthogonal to each other.

The EL panel 1 uses the intersection of the lower electrode 3 and the upper electrode 7 as a picture element, and applies a voltage between the electrodes 3 and 7 to cause the EL light emitting layer 5 to emit light for display. However, if moisture enters the EL light emitting layer 5, the display characteristics are deteriorated. That is, the moisture in the EL light emitting layer 5 is vaporized and expanded by the temperature rise accompanying the voltage application,
The light emitting layer 5 and the electrodes 3, 7 or the insulating layers 4, 6 are peeled off. Therefore, the applied voltage is not applied to the EL light emitting layer 5, and no light is emitted, resulting in, for example, a black dot. Therefore, the emission brightness is lowered and the display characteristics are lowered.

In order to prevent such invasion of moisture, for example, in the EL panel 1 shown in FIG. 5, a sealing member 8 for sealing the EL structure 11 is fixed by an adhesive 9, and the sealing member 8 is fixed. Silicon oil, for example, is injected into the gap between the EL structure 11 and the EL structure 11 to form the insulating fluid layer 10. The EL panel 1 having such a structure is disclosed in, for example, Japanese Patent Laid-Open No. 52-72197. Further, in order to further prevent the invasion of moisture, an example in which a moisture absorbing means such as powdered silica gel is mixed in the insulating fluid layer 10 and an example in which a powdery black substance is mixed in order to improve the contrast ratio are disclosed. It is disclosed in Japanese Patent Publication No. Sho 55-124182. Further, as an example of the insulating fluid layer 10, a dry gas is sealed in place of the silicone oil, as disclosed in JP-A-60-95884.
No.

FIG. 6 shows an EL panel 1 which is a second conventional example.
It is sectional drawing which shows the structure of 2. The EL panel 12 prevents moisture from entering by forming the insulating film 13 on the EL structure 11 described above. In addition, the insulating film 13
A protective film 14 made of a relatively waterproof material such as an epoxy resin is formed on the upper surface of the protective film 14 to further prevent moisture from entering. The EL panel 12 having such a structure is disclosed in, for example, Japanese Patent Application Laid-Open No. 52-72197.

[0007]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
Since it is difficult to seal silicone oil and dry gas in the moisture prevention structure by 0, it takes time to inject silicon oil and dry gas, and an expensive device such as a vacuum device is required. There is a problem that is high. Further, it is disadvantageous to form the insulating fluid layer 10 and to use a relatively heavy material such as silicon oil in order to reduce the thickness and weight of the EL panel.

On the other hand, in the moisture prevention structure by the insulating film 13 described above, when dielectric breakdown occurs in the EL structure 11,
There is a problem that the generated dielectric breakdown expands and disconnection occurs. This is because there is no region where the melted electrode is scattered at the time of dielectric breakdown, so that further dielectric breakdown occurs one after another. Further, the synthetic resin or the like used as the insulating film 13 is applied and cured in a state containing a solvent, for example, but contracts during the curing. Due to the stress of the curing shrinkage, peeling may occur at the contact portion with the EL structure 11.

An object of the present invention is to provide an EL panel which can be manufactured by a relatively simple process, prevents moisture from entering, and prevents dielectric breakdown from spreading even when dielectric breakdown occurs. It is to provide a manufacturing method.

[0010]

According to the present invention, there is provided an EL structure including a translucent substrate, an upper electrode and a lower electrode disposed on the translucent substrate and sandwiching an EL light emitting layer, and the EL structure. An EL comprising a porous member disposed on the body and a moisture-proof member covering the EL structure and the porous member.
It is a panel.

Further, in the present invention, the size of the void of the porous member is equal to or less than the size of one pixel which is the intersection of the upper electrode and the lower electrode of the EL structure, and the diameter of the void is 1
It is characterized by being at least μm.

Further, the present invention is characterized in that the pores of the porous member contain a desiccant.

Further, the present invention is characterized in that a desiccant layer containing a desiccant is disposed between the porous member and the moisture-proof member.

In the present invention, the void of the porous member is
It is characterized in that it contains Ar, He, Ne or N ₂ gas.

Further, according to the present invention, a step of forming an EL structure including an upper electrode and a lower electrode sandwiching an EL light emitting layer on a transparent substrate, and a step of forming a porous member on the EL structure. And a step of covering the EL structure and the porous member with a moisture-proof member in a dry atmosphere.
It is a manufacturing method of an L panel.

In the present invention, the porous member may be the E
It is characterized in that it is formed by applying a liquid or gel-like foam material on the L structure and heating it.

In the present invention, the porous member may be the E
It is characterized by being formed by adhering a sheet-shaped foam or a non-woven fabric onto the L structure.

The present invention is also characterized in that a desiccant is contained in the foam material applied on the EL structure.

Further, the present invention is characterized by including a step of forming a desiccant layer containing a desiccant on the porous member.

In the present invention, the dry atmosphere is Ar,
It is characterized in that the atmosphere is He, Ne or N ₂ gas.

[0021]

According to the present invention, E formed on a transparent substrate
A porous member is formed on the EL structure including the upper electrode and the lower electrode that sandwich the L light emitting layer, and a moisture-proof member that covers the EL structure and the porous member in a dry atmosphere is formed. Since moisture is prevented from entering the EL light-emitting layer by the moisture-proof member, the decrease in emission brightness is reduced. A plurality of voids are formed in the porous member. When dielectric breakdown occurs in the EL structure, the molten electrode material is scattered and diffused into the plurality of voids. Further, the gas generated at the time of dielectric breakdown passes through the plurality of voids and the pressure generated by the generated gas is dispersed, so that a high pressure is not applied locally and physical damage is reduced. . Therefore, even if a dielectric breakdown occurs, the breakdown does not spread, and it is possible to prevent the occurrence of disconnection, which is a fatal defect.

Further, the EL panel of the present invention is disclosed in
-72197, JP-A-55-124182 and JP-A-60-95884 do not use silicone oil or dry gas to prevent moisture, so injection of silicone oil or dry gas It becomes possible to manufacture it relatively easily and at low cost, because no sealing or sealing is required. Further, since a relatively heavy material such as silicone oil is not used, the weight can be reduced.

Furthermore, since the porous member is formed on the EL structure and the moisture-proof member is further formed, if the moisture-proof member is formed by using, for example, a resin having a relatively high viscosity, such as a gel resin, Since the moisture-proof member does not come into direct contact with the EL structure, peeling does not occur due to the curing shrinkage stress of the resin. Furthermore, even if a moisture-proof member such as glass or metal is laminated with an adhesive or the like, the moisture-proof member does not come into direct contact with the EL structure.
There is no physical damage to the EL structure.

Further, according to the invention, the size of the void of the porous member is equal to or less than the size of one picture element which is the intersection of the upper electrode and the lower electrode of the EL structure, and the diameter of the void. Is 1 μm or more. In general, voids having a diameter of molecular level or lower are considered to have an adsorption effect, and therefore, voids having a diameter of molecular level or higher do not have an adsorption effect. The voids of the present invention have a diameter of 1 μm or more, and the diameter of the voids that can provide an adsorption effect, for example, several tens of Å to several thousand Å (average diameter of about 40Å)
Is greater than. In the present invention, the electrode material that is melted and scattered at the time of dielectric breakdown is diffused into such a void. Further, the gas generated at the time of dielectric breakdown passes through the void. The size of one picture element is several 100 μm in a general EL panel or liquid crystal panel.
× Several 100 μm

According to the invention, the porous member is
It is formed by applying a liquid or gel-like foam material on the EL structure and heating. Therefore, the porous member is accurately formed. Further, such a forming method is suitable for automation, and can improve the manufacturing efficiency in manufacturing the EL panel.

According to the invention, the porous member is
It is formed by sticking a sheet-shaped foam or a non-woven fabric on the EL structure. Therefore, the steps of applying the foam material and heating as described above are unnecessary, and the formation of the porous member is facilitated.

Further, according to the present invention, a desiccant is contained in the voids of the porous member. Therefore, the moisture is absorbed by the desiccant, and the invasion of moisture into the EL structure can be further reduced. Therefore, the decrease in emission brightness is further reduced. The desiccant-containing porous member can be formed by including a desiccant in the foam material applied on the EL structure.

According to the invention, a desiccant layer containing a desiccant is formed on the porous member. Therefore, as before, moisture is absorbed by the dry material and the EL
Infiltration of moisture into the structure can be reduced. Therefore, the decrease in emission brightness is further reduced.

According to the present invention, the void of the porous member contains Ar, He, Ne or N ₂ gas. Therefore, the discharge due to the potential difference between the adjacent upper electrodes of the EL structure can be reduced. This is because in the gas atmosphere, larger electric power is required for discharging than in the air atmosphere. Therefore, damage to the EL structure can be prevented. Further, in order to allow the gas to be contained in the voids of the porous member, for example, the moisture-proof member is formed in an Ar, He, Ne or N ₂ gas atmosphere.

[0030]

1 is a cross-sectional view showing the structure of an EL panel 21 which is an embodiment of the present invention. The EL panel 21 includes a translucent substrate 22, a lower electrode 23, a lower insulating layer 24, an EL light emitting layer 25, an upper insulating layer 26, an upper electrode 27, a porous member 28, and a moisture-proof member 29. One surface 22a of the translucent substrate 22 made of, for example, insulating glass
Above the lower electrode 23, the lower insulating layer 24, the EL light emitting layer 2
5, the upper insulating layer 26 and the upper electrode 27 are laminated in this order to form the EL structure 30. That is, for example, an ITO film is formed on the surface 22a by a vapor deposition method, and is patterned by etching to form the lower electrode 23. The lower electrode 23 is patterned into a plurality of parallel strips. On the surface 22a of the substrate 22 on which the lower electrode 23 is formed, S as a lower insulating layer 24 is formed.
An iO ₂ film and a Si ₃ N ₄ film are laminated in this order. The thickness of the SiO ₂ film is selected to be, for example, 500Å,
The film thickness of the Si ₃ N ₄ film is selected to be 2000 Å, for example, and both are formed by, for example, a sputtering method.

On the lower insulating layer 24, an EL light emitting layer 25 made of, for example, ZnS doped with Mn is formed. The thickness of the EL light emitting layer 25 is selected to be 7,000 Å, for example. As an upper insulating layer 26 on the EL light emitting layer 25,
A Si ₃ N ₄ film and a SiO ₂ film are laminated in this order. The film thickness of the Si ₃ N ₄ film is selected to be, for example, 1000Å, and the film thickness of the SiO ₂ film is selected to be, for example, 500Å.
Both are formed, for example, by a sputtering method. An Al film, for example, is formed on the upper insulating layer 26 by a vapor deposition method, and is patterned by etching to form an upper electrode 27. The upper electrode 27 is formed in a plurality of strips and is formed in a direction orthogonal to the lower electrode 23.

Although the EL structure 30 of this embodiment has a so-called thin film type double insulation structure, the EL structure 30 is not limited to this, and may be, for example, a dispersion type.

A porous member 28 is formed on such an EL structure 30. The porous member 28 is made of, for example, polyethylene foam, and on the upper insulating layer 26 on which the upper electrode 27 is formed, for example, a solvent type foaming agent realized by a fluorine compound such as ethane dichloride tetrafluoride or an azo. A polyethylene foam material with a decomposition type foaming agent such as bisformamide added has a film thickness of about 1 m.
It is formed by applying by a printing method so as to be m, heating at about 80 ° C., and drying. By heating the polyethylene foam material, gas is generated and bubbles are formed, so that the porous member 28 having a plurality of voids 28a is formed. Since such a forming method can form the porous member 28 with high accuracy and is suitable for automation, the manufacturing efficiency of the EL panel can be improved.

The size of the void 28a can be arbitrarily selected by appropriately selecting the foaming agent. The size of the void 28a is selected so that it does not affect the display and allows the molten electrode material, gas, etc. generated at the time of dielectric breakdown to sufficiently diffuse or pass through, and is preferably smaller than the size of one pixel. And its diameter is 1 μm
It is formed as described above. The size of one picture element is
In general EL panel and liquid crystal panel, etc.
It is set to 0 μm × several 100 μm.

Further, the EL structure 30 and the porous member 28 are covered with a moistureproof member 29. The moisture-proof member 29 is realized, for example, by laminating an Al foil on a polyester film, and the EL structure 3 is provided in a dry atmosphere.
0 and the porous member 28 are attached so as to cover them.

EL panel 2 formed as described above
In the first example, the intersection of the lower electrode 23 and the upper electrode 27 is used as a picture element, and the EL light emitting layer 25 arranged between the electrodes 23 and 27 is caused to emit light to perform display. Light emission of the EL light emitting layer 25 occurs when the voltage applied between the electrodes 23 and 27 exceeds a predetermined threshold voltage, and display is performed by controlling the applied voltage.

The EL panel 21 has an EL light emitting layer 25.
If moisture penetrates into it, the light emission characteristics will deteriorate. That is, E
Moisture in the L light emitting layer 25 is vaporized and expanded by the temperature rise accompanying the voltage application, and the EL light emitting layer 25 and the electrodes 23 and 27 are expanded.
Alternatively, the insulating layers 24 and 26 are separated. Therefore, the applied voltage is not applied to the EL light emitting layer 25, and no light emission occurs, resulting in, for example, a black dot. Therefore, the emission brightness is lowered and the display characteristics are lowered. However, since the EL panel 21 of this embodiment is provided with the moisture-proof member 29 for preventing the intrusion of moisture, the occurrence of the above-mentioned inconvenience is reduced.

Further, when dielectric breakdown occurs in the EL structure 30, the electrode melts. The melted electrode material is scattered and diffused into the plurality of voids 28 a of the porous member 28. For this reason, the problem that the dielectric breakdown expands and disconnection occurs is reduced. Further, the gas generated when the electrode is broken passes through the plurality of voids 28a, and the pressure generated by the generated gas is dispersed. Therefore, high pressure is not applied locally, and the occurrence of physical damage is reduced.

In the present embodiment, the film moistureproof member 29 is formed so as to cover the EL structure 30 and the porous member 28.
Although the example of sticking is described, for example, an example in which an epoxy resin is applied and heated and dried, or a plate-like moisture-proof member made of, for example, synthetic resin, glass, or metal like the EL panel 31 shown in FIG. 32 for adhesive 3
The example of adhering with 3 also belongs to the scope of the present invention.

In this embodiment, the polyethylene member is used as the porous member 28. However, the porous member 28 is not limited to this, and a thermally and chemically stable material, for example, may be used. Polyurethane,
Foam such as styrene, natural rubber, and synthetic rubber may be used. Further, the foam material to be applied may be in any state such as liquid state or gel state. Furthermore, the porous member 2
The material 8 is not limited to foam and may be any porous material, such as nonwoven fabric. Therefore, the porous member 2
The method of forming 8 is not limited to the method described above, and may be a method of attaching a sheet-shaped foam or non-woven fabric using an adhesive, for example. By such a forming method, the application and heating steps of the foam material described above are unnecessary,
It becomes easy to form the porous member 28.

By using a foamed sheet having adhesiveness as the porous member 28, the moisture-proof member 2 can be obtained.
The formation of 9, 32 can be made reliable and simple. Moreover, the porous member 2 is formed on the film having a moisture-proof effect.
8 may be formed, and the film may be attached so that the porous member 28 and the EL structure 30 are in contact with each other. This makes it possible to collectively form the porous member 28 and the moisture-proof member 29.

Further, as the structure of the porous material, generally, a closed cell structure in which individual cells are independent and an open cell structure in which unit cells penetrate each other are generally used.
The ell (open cell) structure is known. As the porous member 28, the latter Open Cell is used so that the electrode material melted at the time of dielectric breakdown can be sufficiently diffused into the voids 28a and the generated gas can sufficiently pass through.
Although structural applications are desirable, the invention is not so limited.

Furthermore, although the example in which the moisture-proof member 29 is formed in a dry atmosphere has been described in this embodiment, an example in which the moisture-proof member 29 is formed in a gas atmosphere of Ar, He, Ne, N ₂ or the like is also within the scope of the present invention. Belong to. As a result, a discharge occurs due to the potential difference between the adjacent upper electrodes 27 of the EL panel 21, and the EL panel 2 is discharged by the discharge.
It is possible to prevent 1 from being damaged. That is, in the gas atmosphere described above, discharge occurs when a voltage higher than that in the air atmosphere is applied, and thus a higher voltage is required for discharging. Therefore, when the moisture-proof member 29 is formed in the gas atmosphere, the void 28a of the porous member 28 becomes the gas atmosphere, and the occurrence of discharge can be reduced. Further, by using, for example, a material that generates N ₂ gas at the time of foaming as the foam material that is the porous member 28, it is possible to reduce the occurrence of discharge in the same manner as described above. Therefore, it is possible to prevent the EL panel 21 from being damaged by the discharge.

FIG. 3 is a sectional view showing the structure of an EL panel 35 which is another embodiment of the present invention. EL panel 35
Is substantially the same as the EL panel 21, but is characterized in that the desiccant 36 is contained in the void 28a of the porous member 28. The desiccant 36 is realized by, for example, granular silica gel. Void 2 of porous member 28
The inclusion of the desiccant 36 in 8a can be accomplished by including the desiccant in a foam material such as the polyethylene described above.

FIG. 4 is a sectional view showing the structure of an EL panel 38 which is still another embodiment of the present invention. The EL panel 38 has substantially the same structure as the EL panel 21, but the desiccant layer 3 containing the desiccant material on the porous member 28.
9 is arranged. Dry material layer 39
Are realized by silica gel or the like formed in a plate shape. In this way, the desiccant 36 is included, or the desiccant layer 3
Moisture is absorbed by providing 9, so EL
Ingress of moisture into the structure 30 can be reduced,
It is possible to further reduce the deterioration of the display characteristics due to the deterioration of the light emitting function. In the EL panels 35 and 38 of FIGS. 3 and 4, the same components as those of the EL panel 21 are designated by the same reference numerals.

In this embodiment, the example in which the EL panel 1 is used as the display means has been described, but an example in which the EL panel 1 is used as a light source of a non-emissive display means such as a liquid crystal display element is also within the scope of the present invention. Belong to.

The EL panel 21 according to the present invention described above,
Nos. 31, 35, and 38 do not use the silicone oil or dry gas described in JP-A-52-72197, JP-A-55-124182, and JP-A-60-95884. Since it is not necessary to inject a dry gas, it can be manufactured relatively easily and inexpensively.
Further, since silicone oil or the like is not used, the weight can be reduced. Further, since the porous member 28 is arranged between the moisture-proof members 29 and 32 and the EL structure 30,
The moisture-proof members 29 and 32 and the EL structure 30 do not come into direct contact with each other, resulting in peeling due to stress when the resin as the moisture-proof members 29 and 32 cures and shrinks, and the EL structure 30.
No damage.

Further, JP-A-1-140592 uses a porous member impregnated with an insulating protective material having a low softening point,
An example is disclosed in which the electrode material scattered at the time of dielectric breakdown is protected by the melted insulation protection material having the low softening point to prevent the expansion of the dielectric breakdown. However, according to the present invention, the electrode material scattered during the dielectric breakdown is prevented from expanding the dielectric breakdown by diffusing into the plurality of voids 28a of the porous member 28, and is used in JP-A-1-140592. It does not require an insulating protective material having a low softening point. Therefore, the EL panel according to the present invention is easier to form.

In addition, in Japanese Utility Model Publication No. 60-156669,
An example of disposing porous glass is disclosed. this is,
The size of the pores formed in the porous glass is set to several 10Å to several 1000Å (average pore diameter of 40Å), and moisture or gas is adsorbed to the pores by the adsorption effect. Since it is generally considered that voids having a diameter of molecular level or lower have an adsorption effect, it is considered that voids having a diameter of molecular level or higher do not have an adsorption effect. The porous member 28 of the present invention is not expected to have the above-described adsorption effect, and the size of the void 28a of the porous member 28 is, for example, one pixel or less and its diameter as described above. It is formed to have a thickness of 1 μm or more. Further, although the present invention has a function of buffering the influence of the scattering of electrodes and the generation of gas at the time of dielectric breakdown, the above-mentioned Japanese Utility Model Application Laid-Open No. 60-156694 also has the above-mentioned buffering effect although it has an adsorption effect. It is something that cannot be done.

[0050]

As described above, according to the present invention, a porous member having a plurality of voids in which a molten electrode material generated at the time of dielectric breakdown is diffused is arranged on the EL structure, and further E
A moisture-proof member that prevents moisture from entering the L structure is arranged. Therefore, element peeling due to moisture can be prevented. Further, the expansion of the dielectric breakdown is prevented, and the occurrence of disconnection, which is a fatal defect, can be reduced. Further, the gas generated at the time of dielectric breakdown passes through the plurality of voids, so that the generated gas is dispersed and the occurrence of damage due to the partial high pressure is reduced. Further, it can be manufactured by a simple process, and a relatively low cost material can be used.

Further, according to the present invention, the size of the voids of the porous member is not larger than the size of one picture element, and the diameter thereof is 1 μm.
That is all. The melted electrode material generated at the time of dielectric breakdown diffuses into such voids, and the generated gas passes through the voids.

According to the present invention, the porous member is formed by applying a liquid or gel-like foam material and heating it. Therefore, the porous member with high accuracy,
Further, it can be formed efficiently.

Further, according to the present invention, the porous member is formed by sticking a sheet-shaped foam or nonwoven fabric. Therefore, it becomes easy to form the porous member.

Further, according to the present invention, the pores of the porous member contain a desiccant. Further, a desiccant layer containing a desiccant is formed between the porous member and the moisture-proof member. Moisture is absorbed by the desiccant or dry material, further reducing moisture ingress into the EL structure.

Further, according to the present invention, the void of the porous member contains Ar, He, Ne or N ₂ gas. Therefore, the discharge due to the potential difference between the adjacent upper electrodes of the EL structure is reduced, and the damage of the EL structure is reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of an EL panel 21 that is an embodiment of the present invention.

FIG. 2 is a sectional view showing a configuration of an EL panel 31 which is another embodiment of the present invention.

FIG. 3 is an EL panel 3 which is still another embodiment of the present invention.
It is sectional drawing which shows the structure of 5.

FIG. 4 is an EL panel 3 which is still another embodiment of the present invention.
It is sectional drawing which shows the structure of 8.

FIG. 5 is a cross-sectional view showing a configuration of an EL panel 1 which is a first conventional example.

FIG. 6 is a cross-sectional view showing a configuration of an EL panel 12 which is a second conventional example.

[Explanation of Codes] 21, 31, 35, 38 EL Panel 22 Translucent Substrate 23 Lower Electrode 25 EL Light Emitting Layer 27 Upper Electrode 28 Porous Member 28a Void 29, 32 Moisture Proof Member 30 EL Structure 36 Drying Agent 39 Drying Material layer

Claims (11)

[Claims] 1. A translucent substrate, an EL structure disposed on the translucent substrate and including an upper electrode and a lower electrode sandwiching an EL light emitting layer, and a porous structure disposed on the EL structure. An EL panel comprising: a member; and a moisture-proof member that covers the EL structure and the porous member. 2. The size of the voids in the porous member is the E
2. The EL panel according to claim 1, wherein the size of one pixel, which is the intersection of the upper electrode and the lower electrode of the L structure, is not more than the size of one pixel, and the diameter of the void is not less than 1 μm. 3. The EL panel according to claim 1, wherein a desiccant is contained in the voids of the porous member. 4. The EL panel according to claim 1, wherein a desiccant layer containing a desiccant is disposed between the porous member and the moisture-proof member. 5. Ar, He,
The EL panel according to claim 1, wherein the EL panel contains Ne or N ₂ gas. 6. A step of forming an EL structure including an upper electrode and a lower electrode sandwiching an EL light emitting layer on a translucent substrate; a step of forming a porous member on the EL structure; And a step of covering the structural body and the porous member with a moisture-proof member in a dry atmosphere. 7. The manufacturing of an EL panel according to claim 6, wherein the porous member is formed by applying a liquid or gel-like foam material on the EL structure and heating the same. Method. 8. The method for manufacturing an EL panel according to claim 6, wherein the porous member is formed by adhering a sheet-shaped foam or a non-woven fabric on the EL structure. 9. The desiccant is included in the foam material applied onto the EL structure.
A method for manufacturing the described EL panel. 10. The method according to claim 6, further comprising forming a desiccant layer containing a desiccant on the porous member.
A method for manufacturing the described EL panel. 11. The dry atmosphere is Ar, He, Ne.
Alternatively, the N ₂ gas atmosphere is used, and the method of manufacturing an EL panel according to claim 6.