JP2005019151A - Organic electroluminescent panel and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate adhesion failure in an organic electroluminescent panel in which a lead electrode is provided across an adhesive area. <P>SOLUTION: The organic electroluminescent panel 10 comprises a first electrode 12 formed on a support substrate 11, having the lead electrode 12A provided across the adhesive area M. A pseudo pattern 30 is provided in an area in the adhesion area M where the lead electrode 12A is not formed. The pseudo pattern 30 is formed as a plurality of linear patterns along the longitudinal direction of the adhesion area M. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an organic EL (Electroluminescence) panel and a method for manufacturing the same.
[0002]
[Prior art]
The organic EL panel has a basic configuration of an organic EL element in which a first electrode is formed on a support substrate, an organic layer including a light emitting layer made of an organic compound is formed thereon, and a second electrode is formed thereon. The organic EL elements are arranged on a flat substrate as unit surface light emitting elements.
[0003]
In order to connect the driving circuit to the organic EL panel, a lead line is drawn from the first electrode to one side of the support substrate, and a lead line is drawn from the second electrode to one side on a different support substrate. Has a pull-out structure. On the other hand, in the organic EL panel, since the organic layer and the electrode described above are deteriorated in light emission characteristics when exposed to the outside air, the sealing substrate is bonded to the supporting substrate via an adhesive, and the organic layer and the electrode are bonded. It is common practice to seal the electrodes.
[0004]
At this time, an annular region formed inside the outer edge of the support substrate becomes an adhesive region, an adhesive layer is formed there, and the support substrate and the sealing substrate are bonded together. Since there is a side where the lead line is formed and a side where the lead line is not formed on the outer edge of the adhesive layer, the thickness of the adhesive layer is different between the part where the lead line crosses and the part where the lead line does not cross in the adhesive region, thereby In some cases, the sealing substrate may be inclined and bonded, or the adhesive surface may be peeled off due to the shrinkage of the adhesive after the adhesive is cured.
[0005]
In order to cope with this problem, the following prior art shown in FIG. This prior art is an organic EL panel in which a support substrate 1 and a sealing substrate 2 are bonded together through an adhesive layer 4 mixed with a spacer 5, and the extraction electrode 3 is pulled out across a part of the adhesion region 4A. In this case, a dummy pattern (pseudo pattern) 6 is formed in a portion of the adhesive region 4A where the extraction electrode 3 is not formed. According to this, the bottom surface can be made flat in both the adhesion region that the extraction electrode 3 crosses and the adhesion region that does not cross.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-189190
[Problems to be solved by the invention]
According to the above-described prior art, in the adhesive region where the pseudo pattern is formed, most of the adhesive layer is formed on the pseudo pattern, and the adhesive is originally formed on the support substrate made of a material such as glass. Since the layer is formed on a pseudo pattern made of metal or the like, there is a possibility that a predetermined adhesion force cannot be obtained and adhesion failure occurs. In addition, since the adhesive layer is formed on the flat pseudo pattern, the adhesive is likely to flow toward the outer edge of the support substrate due to the pressure applied when the support substrate and the sealing substrate are bonded together. There was a problem that poor adhesion was likely to occur in the portion where the spilled out.
[0008]
Further, in the above-described conventional technology, the pseudo pattern is mainly formed in the adhesion region, and a sealing space formed between the support substrate and the sealing substrate is provided in a portion B (see FIG. 1) inside the adhesion region. There is a possibility that external light may enter, and the back surface of the sealing substrate can be seen from the support substrate side serving as a display surface, which is not preferable in appearance.
[0009]
This invention makes it an example of a subject to cope with such a problem. That is, by forming a pseudo pattern in a region where the extraction electrode is not formed in the adhesion region, the thickness of the adhesive layer is made uniform, and adhesion failure is prevented from occurring in a portion where the pseudo pattern is formed in the adhesion region. It is an object of the present invention to prevent external light intrusion inside the region and improve the appearance performance.
[0010]
[Means for Solving the Problems]
In order to achieve such an object, the organic EL panel and the manufacturing method thereof according to the present invention include at least the configurations according to the following independent claims.
[0011]
[Claim 1] An organic EL element in which an organic layer including at least a light-emitting layer is sandwiched between a pair of electrodes is formed on a support substrate, and the support substrate and a sealing substrate that blocks the organic EL element from the outside air An organic EL panel in which an extraction electrode drawn from each of the electrodes is formed across a part of the bonding region to be bonded, and at least a region in the bonding region where the extraction electrode is not formed is formed with a pseudo pattern, The pseudo pattern has a plurality of line-shaped patterns along the longitudinal direction of the adhesion region.
[0012]
[Claim 5] An organic EL element in which an organic layer including at least a light-emitting layer is sandwiched between a pair of electrodes is formed on a support substrate, and the support substrate and a sealing substrate for shielding the organic EL element from the outside air are formed. A method of manufacturing an organic EL panel in which an extraction electrode extracted from each of the electrodes is formed across a part of an adhesion region to be bonded, and in the step of forming any of the extraction electrodes on the support substrate, A method of manufacturing an organic EL panel, comprising forming a pseudo pattern having a plurality of line-shaped patterns along a longitudinal direction of the adhesion region at least in a region where the extraction electrode is not formed in the adhesion region.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 is a plan view showing a state in which the sealing substrate in the organic EL panel according to the embodiment of the present invention is removed, and FIG. 3 is a view of bonding the sealing member in the organic EL panel according to the embodiment of the present invention. Sectional drawing (AA sectional drawing in FIG. 2) of the state which showed the state is shown.
[0014]
In the organic EL panel 10, a first electrode 12 is formed on a support substrate 11, an organic layer 13 including at least a light emitting layer is formed thereon, and a second electrode 14 is further formed thereon, and a pair of An organic EL element 20 having an organic layer 13 sandwiched between electrodes (first electrode 12 and second electrode 14) is formed, and the organic EL element 20 is arranged on a dot matrix to form a display region 20A. Yes.
[0015]
And the sealing space which interrupts | blocks the organic EL element 20 mentioned above from external air is formed by bonding the sealing substrate 15 with respect to the support substrate 11. FIG. The bonding of the support substrate 11 and the sealing substrate 15 forms an adhesive layer 16 in which spacers 16 </ b> A are mixed as necessary in an adhesive region M formed in an annular shape along the outer edge of the support substrate 11. It is made by things. A drying means 17 is attached to the inner surface of the sealing substrate 15 as necessary.
[0016]
In such an organic EL panel 10, a lead electrode 12A drawn from the first electrode 12 toward the outer edge of the one side 11a is formed on the support substrate 11, and the second electrode 14 toward the outer edge of the one side 11b. A lead electrode 14A drawn from is formed, and the first electrode 12, the second electrode 14 and the drive circuit are connected to each other. Accordingly, the lead electrode 12A drawn from the first electrode 12 is formed across the adhesion region M around the one side 11a, and the lead electrode 14A drawn from the second electrode 14 crosses the adhesion region M around the one side 11b. Is formed.
[0017]
In the organic EL panel 10 of the present embodiment, the pseudo pattern 30 is formed at least in the region where the extraction electrodes 12A and 14A are not formed in the adhesion region M described above, and the pseudo pattern 30 is formed along the longitudinal direction of the adhesion region M. A plurality of line patterns are used. That is, in the pseudo pattern 30, a plurality of lines 30a are arranged along the adhesion region M with a predetermined interval 30b.
[0018]
Moreover, as one embodiment, the pseudo pattern 30 has a cut portion 31 that intersects the longitudinal direction of the adhesion region M and divides the pseudo pattern 30 at the corner of the adhesion region M. The pseudo pattern 30 is formed of the same material as either the first electrode 12 or the second electrode 14 and is formed to have the same thickness as the extraction electrodes 12A and 14A.
[0019]
Furthermore, as one embodiment, as shown in FIG. 4, the pseudo pattern 30 is formed so as to block the inside external light incident portion L from the adhesion region M. Here, the external light incident part L is an area formed between the display area 20 </ b> A inside the adhesion area M.
[0020]
The operation of the organic EL panel of such an embodiment will be described with reference to FIG. Since the organic EL panel 10 forms the pseudo pattern 30 in the region where the extraction electrodes 12A and 14A are not formed in the adhesion region M, and the pseudo pattern 30 is a plurality of line patterns along the longitudinal direction of the adhesion region M. The flow of the adhesive caused by the pressure applied when the support substrate 11 and the sealing substrate 15 are bonded together is made in the direction along the adhesion region M as shown by the arrow in the figure, and the adhesive is spread throughout the adhesion region M. At the same time, the flow toward the outer edge side of the support substrate 11 is prevented. This is because the flow of the adhesive is restricted by the unevenness formed by the lines 30a and the intervals 30b of the pseudo pattern M. As a result, a uniform distribution of the adhesive is made in the entire bonding region M, and poor adhesion due to the uneven adhesive can be eliminated. Furthermore, since the adhesive adheres to the support substrate 11 at the interval 30b, it is possible to ensure an appropriate adhesive force as compared with the case where most of the adhesive region M is covered with the pseudo pattern 30.
[0021]
Moreover, since the pseudo pattern 30 has the notch 31 which cross | intersects the longitudinal direction of the adhesion | attachment area | region M at the corner | angular part of the adhesion | attachment area | region M, the flow of the adhesive agent mentioned above is FIG. As shown in FIG. 3, the adhesive portions are gathered in the cut portions 31, and the adhesive can be spread to every corner of the bonding region M. In addition, even when bubbles are formed in the recesses of the interval 30b, the bubbles can be discharged from the cut portion 31 according to the flow of the adhesive, so that the bubbles do not remain in the bonding region M, which is reliable. Adhesive strength and sealing performance can be secured. In addition, when the pseudo pattern 30 is formed by etching, it is considered that an etching solution pool is generated in the recesses of the interval 30b. However, the cut portion 31 serves to quickly discharge the etching solution stored in the recesses. As a result, the liquid breakability during pattern formation is also improved.
[0022]
Furthermore, by forming the pseudo pattern 30 with the same material as either the first electrode 12 or the second electrode 14, it becomes possible to form the pseudo pattern 30 in the same process as the electrode formation, By making the extraction electrodes 12A and 14A crossing the region M and the pseudo pattern 30 have the same thickness, the thickness of the adhesive layer 16 in the bonding region M can be made uniform, and the inclination of the sealing substrate 15 can be made uniform. This prevents the adhesion failure.
[0023]
In addition, by blocking the inside external light incident portion from the adhesion region M with the pseudo pattern 30, it is possible to prevent transmission visual recognition that the inside of the sealed space can be seen from the support substrate 11 side, and to eliminate the appearance defect. it can. In order to obtain this effect of preventing seeing through transmission, it is more effective to reduce the width of the interval 30b. A range of 1 to 200 μm is preferable, and a range of 10 to 150 μm is more preferable. When the interval 30b is increased, the adhesion of the adhesive is improved, but the above-described effect of preventing visible transmission is reduced.
[0024]
FIG. 6 shows a pattern shape example of the pseudo pattern 30. (A) is an example in which linear lines 30a are arranged in a stripe pattern, (b) is an example in which jagged lines 30a are arranged, (c) is an example in which wavy lines 30a are arranged, d) An example in which straight lines 30a divided by providing cut portions 31 at predetermined intervals are arranged with the positions of the cut portions 31 shifted, and FIG. 5E shows a straight line divided by providing cut portions 31 at predetermined intervals. An example in which the positions of the cut portions 31 are aligned with the line 30a, and FIG. 8F is an example in which the positions of the cut portions 31 are aligned with a jagged line 30a divided by providing the cut portions 31 at predetermined intervals. g) shows an example in which the cut-out portions 31 are provided at predetermined intervals and the wavy lines 30a are divided and aligned, and FIG. 11 (h) shows an example in which a plurality of types of lines 30a are arranged. The embodiment of the present invention may have any form as long as it is a plurality of line patterns.
[0025]
Below, the manufacturing method of the organic electroluminescent panel which concerns on embodiment of this invention is demonstrated. FIG. 7 is a flowchart illustrating a method for manufacturing an organic EL panel according to the embodiment. First, the first electrode 12, the lead electrodes 12A and 14A, and the pseudo pattern 30 are formed on the support substrate 11 (step S01). When the pseudo pattern 30 is formed of the same material as that of the first electrode 12, the first electrode 12, the extraction electrode 12A, and the pseudo pattern 30 are formed from the same material by mask vapor deposition or the like, and the extraction electrode 14A is further formed. The formation region is formed with another material. When the pseudo pattern 30 is formed of the same material as that of the second electrode 14, the first electrode 12 and the extraction electrode 12A are formed of the same material by mask vapor deposition or the like, and the extraction electrode 14A and the pseudo pattern 30 are further formed. The formation region is formed with another material. Then, this film formation is subjected to patterning by photolithography or the like to form the pattern of the first electrode 12, the patterns of the extraction electrodes 12A and 14A, and the pseudo pattern 30, respectively.
[0026]
Next, pretreatment such as drying or cleaning is performed on the support substrate 11 on which the above-described pattern formation has been performed (step S02), and then the above-described organic layer 13 is formed by vacuum deposition or the like (step S03). A second electrode 14 is formed thereon.
[0027]
On the other hand, in parallel with the above-described process, for the above-described sealing substrate 15, the sealing substrate 15 is prepared on the transport tray (step S11), and the drying means 17 is attached to the sealing substrate 15 (step S12). Then, an adhesive is applied to a location corresponding to the adhesion region M (step S13). The adhesive may be applied on the sealing substrate 15 side as described above or on the support substrate 11 side.
[0028]
Thereafter, the support substrate 11 and the sealing substrate 15 are bonded together (step S05). In the case where an ultraviolet curable resin is used as the adhesive, the adhesive is cured by irradiating the adhesive region M with ultraviolet light after bonding. Thereafter, a panel is formed by a process such as division (step S06), and the process proceeds to an inspection step as necessary.
[0029]
According to the manufacturing method of such an embodiment, the pseudo pattern 30 can be formed in the step of forming any one of the extraction electrodes 12A and 14A on the support substrate 11. According to this, since the pseudo pattern 30 can be formed by the same pattern forming process as the extraction electrodes 12A and 14A, the manufacturing is completed without any additional process in manufacturing the useful organic EL panel described above. be able to.
[0030]
According to the embodiment as described above, the thickness of the adhesive layer 16 can be made uniform by forming the pseudo pattern 30 in the region where the extraction electrodes 12A and 14B in the adhesion region M are not formed. It is possible to prevent adhesion failure from occurring in the portion where is formed. In addition, the appearance performance can be improved by preventing external light from entering inside the bonding region M. Furthermore, the adhesive performance as described above can be improved by the line pattern of the pseudo pattern 30 formed in the adhesion region M.
[0031]
【Example】
Below, the specific example regarding the structural member of embodiment mentioned above is shown, and it is set as the Example of this invention.
[0032]
a. Electrode / lead electrode / pseudo pattern;
Any of the first electrode 12 formed on the support substrate 11 and the second electrode 14 formed on the organic layer 13 may be set as an anode or a cathode. The anode is made of a material having a work function higher than that of the cathode, such as a metal film such as chromium (Cr), molybdenum (Mo), nickel (Ni), platinum (Pt), indium oxide (In ₂ O ₃ ), ITO, IZO, etc. The transparent conductive film is used. Conversely, the cathode is made of a material having a work function lower than that of the anode, such as a metal film such as aluminum (Al) or magnesium (Mg), an amorphous semiconductor such as doped polyaniline or doped polyphenylene vinylene, Cr ₂ O _3. , NiO, Mn ₂ O _{5 and} other oxides can be used. In general, the light extraction side is formed of a transparent electrode, but the first electrode 12 and the second electrode 14 are both formed of a transparent material, and a reflective film is provided on the electrode side opposite to the light emission side. A reflective film may be provided on the one electrode 12 side to form a top light emitting element, and a reflective film may be provided on the second electrode 14 side to form a bottom light emitting element.
[0033]
As an electrode structure for forming a plurality of organic EL elements in a dot matrix form on the support substrate 11, a plurality of second electrodes 14 are formed so as to be orthogonal to the first electrodes 12 formed in a plurality of stripes. A passive drive system in which an organic EL element is formed on the intersecting surface of the electrode 12 and the second electrode 14, and each organic EL element is driven by applying a voltage to the selected first electrode 12 and second electrode 14, a support substrate A unit electrode (pixel electrode) for each display unit is formed as the first electrode 12 on 11, and a uniform electrode covering them is formed as the second electrode 14, and each display unit is driven by an active element such as a thin film transistor. Any of an active drive method and the like may be adopted. The first electrode 12 can be formed by film formation such as vapor deposition or sputtering and patterning by mask, photolithography or the like. The second electrode 14 can be formed by film formation such as vapor deposition or sputtering and patterning using a mask, electrode partition walls, or the like.
[0034]
The lead electrodes 12A and 14A can be formed of the same material as the first electrode 12 and the second electrode 14, respectively. The pseudo pattern 30 can also be formed of the same material as either the first electrode 12 or the second electrode 14 as described above.
[0035]
b. Support substrate;
As the support substrate 11, various types of shapes such as a plate shape, a film shape, and a spherical shape can be adopted according to the form of the display panel formed by the organic EL element. The material can be formed of glass, plastic, quartz, metal or the like. When forming a bottom emission type display panel that extracts light from the support substrate side, a transparent material is employed, but a top emission type display panel that extracts light from the side opposite to the support substrate is formed. In this case, transparency is not an issue. Examples of suitable materials in the bottom emission method include transparent glass and transparent plastic.
[0036]
c. Organic layer;
The organic layer 13 is generally formed by an organic light emitting functional layer composed of a hole transport layer, a light emitting layer, and an electron transport layer, but only one layer each of the light emitting layer, the hole transport layer, and the electron transport layer. Alternatively, a plurality of layers may be laminated, and either one or both of the hole transport layer and the electron transport layer may be omitted. It is also possible to insert organic functional layers such as a hole injection layer and an electron injection layer depending on the application. The material for forming the organic layer may be a conventionally used material, and may be a low molecular material or a high molecular material.
[0037]
These organic layers 13 can be formed by a wet process such as a coating method such as a spin coating method or a dipping method, a printing method such as an ink jet method or a screen printing method, or a dry process such as a vapor deposition method or a laser transfer method. . Further, in the present invention, the organic EL panel using both light emission (fluorescence) when returning from the singlet excited state to the ground state and light emission (phosphorescence) when returning from the triplet excited state to the ground state is used. Is possible.
[0038]
d. Sealing substrate;
The sealing substrate 15 is formed of a substrate made of metal, glass, plastic, or the like. In the case of glass, it is possible to use the sealing substrate 15 formed with a sealing recess (regardless of one-stage digging or two-stage digging) by processing such as press molding, etching, blasting, Moreover, flat glass can be used and a sealing space can also be formed between the support substrate 11 by glass or a plastic spacer.
[0039]
e. Drying means;
Drying means: zeolite, silica gel, carbon, carbon nanotubes and other physical desiccants, alkali metal oxides, metal halides, chemical peroxides such as chlorine peroxide, organometallic complexes in toluene, xylene, aliphatic organic solvents It can be formed by a desiccant dissolved in a petroleum solvent such as a desiccant dispersed in a binder such as polyethylene, polyisoprene, and polyvinyl cinnaate having transparency.
[0040]
f. Various types of organic EL panels;
The display method of the organic EL panel 10 may be single-color light emission or multi-color light emission of two or more colors. In particular, in order to realize a multi-color light emission organic EL panel, three types of light emitting functional layers corresponding to RGB are formed. A method that forms a light emitting functional layer of two or more colors including a method (painting method), a method that combines a single color light emitting functional layer such as white or blue with a color conversion layer using a color filter or a fluorescent material (CF method, CCM method) ), A method that realizes multiple emission by irradiating electromagnetic waves to the light emitting area of the monochromatic light emitting functional layer (photo bleaching method), a method in which two or more sub-pixels are stacked vertically to form one pixel ( SOLED (transparent tracked OLED) method or the like. Further, the drive method of the organic EL element may be either the passive drive method or the active drive method as described above, and the light extraction method is the bottom emission method where the light is extracted from the support substrate 11 side as described above, or the sealing substrate 15. Either of the top emission methods taken out from the side may be used.
[0041]
g. Example of manufacturing method;
First, a first electrode 12 such as ITO as an anode and a lead wire 12A thereof, a lead wire 14A of a second electrode, and a pseudo pattern 30 are formed on a support substrate 11 formed of glass, plastic, or the like by a method such as vapor deposition or sputtering. A film is formed and patterned into a desired shape by photolithography or the like. A two-layer structure in which a low-resistance metal such as Ag, Al, Cr, or an Ag alloy is laminated on the ITO film, and a three-layer structure in which a protective electrode is laminated on the first electrode 12, lead electrodes 12A and 14A, pseudo The pattern 30 may be used.
[0042]
Next, the organic layer 13 including the light emitting layer is formed by a wet process such as a coating method such as a spin coating method or a dipping method, a printing method such as a screening printing method or an inkjet method, or a dry process such as a vapor deposition method or a laser transfer method. To do. As an example, the hole transport layer, the light emitting layer, and the electron transport layer are sequentially stacked by vapor deposition.
[0043]
At this time, when forming the light emitting layer, a film formation mask is used, and the light emitting layer is separately applied in accordance with a plurality of light emission colors. For painting separately, an organic material that emits light of three colors of RGB or a combination of a plurality of organic materials is formed for each pixel region corresponding to RGB. By forming a film with the same material twice or more in one pixel area, it is possible to prevent the pixel area from being not formed.
[0044]
Next, several second electrodes 14 of a metal thin film are formed as cathodes formed in several stripes so as to be orthogonal to the first electrode 12, and a matrix is formed by the first electrode 12 and the second electrode 14. The second electrode 14 forms a thin film by a method such as vapor deposition or sputtering.
[0045]
The step of sealing the last sealing substrate 15 and the support substrate 11 with an adhesive is performed by using a UV-curable epoxy resin adhesive, a spacer having a particle diameter of 1 to 300 μm (a glass or plastic spacer is preferable. ) Is mixed (approx. 0.1 to 0.5% by weight) and applied to the adhesion region M of the support substrate 11 or the sealing substrate 15 using a dispenser or the like. Next, the sealing substrate 15 and the support substrate 11 are bonded together in an inert gas atmosphere such as argon gas. Thereafter, the adhesive is cured by irradiating the adhesive with ultraviolet rays from the support substrate side or the sealing substrate side. In this manner, the organic EL element 20 is sealed in a state where an inert gas such as argon gas is sealed in the sealing space between the sealing substrate 11 and the support substrate 15.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a prior art.
FIG. 2 is a plan view showing a state where a sealing substrate is removed from an organic EL panel according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view (A-A cross-sectional view in FIG. 2) in a state where a sealing member in an organic EL panel according to an embodiment of the present invention is bonded.
FIG. 4 is an explanatory diagram of an organic EL panel according to another embodiment of the present invention.
FIG. 5 is an explanatory diagram showing the operation of the organic EL panel according to the embodiment of the present invention.
FIG. 6 is an explanatory diagram showing an example of a pattern shape of a pseudo pattern in the embodiment of the present invention.
FIG. 7 is a flowchart illustrating a method for manufacturing an organic EL panel according to an embodiment of the present invention.
[Explanation of symbols]
10 organic EL panel 11 support substrate 12 first electrode 13 organic layer 14 second electrode 15 sealing substrate 16 adhesive layer 16A spacer 17 drying means 20 organic EL element 20A display area 30 pseudo pattern 30a line 30b interval M adhesion area

Claims (8)

An organic EL element in which an organic layer including at least a light emitting layer is sandwiched between a pair of electrodes is formed on a support substrate, and an adhesive region for bonding the support substrate and a sealing substrate that shields the organic EL element from the outside air An organic EL panel in which a lead electrode that is drawn from each of the electrodes is formed across a portion,
An organic EL panel, wherein a pseudo pattern is formed at least in a region where the extraction electrode is not formed in the adhesion region, and the pseudo pattern has a plurality of line-shaped patterns along a longitudinal direction of the adhesion region. 2. The organic EL panel according to claim 1, wherein the pseudo pattern has a cut portion that intersects the longitudinal direction at a corner portion of the adhesion region to divide the pseudo pattern. 3. The organic EL panel according to claim 1, wherein the pseudo pattern is formed of the same material as any of the electrodes and has the same thickness as the extraction electrode. The organic EL panel according to any one of claims 1 to 3, wherein the pseudo pattern is formed so as to close an outside light incident portion inside from the adhesion region. An organic EL element in which an organic layer including at least a light emitting layer is sandwiched between a pair of electrodes is formed on a support substrate, and an adhesive region for bonding the support substrate and a sealing substrate that shields the organic EL element from the outside air A method for producing an organic EL panel in which a lead electrode is formed across each part and drawn from each of the electrodes,
In the step of forming any one of the lead electrodes on the support substrate, a pseudo pattern having a plurality of line-shaped patterns along the longitudinal direction of the adhesion region is formed at least in a region where the lead electrode is not formed in the adhesion region. A method for producing an organic EL panel, comprising: forming an organic EL panel. 6. The method of manufacturing an organic EL panel according to claim 5, wherein the pseudo pattern has a cut portion that intersects the longitudinal direction at a corner portion of the adhesion region to divide the pseudo pattern. The method of manufacturing an organic EL panel according to claim 5, wherein the pseudo pattern is formed of the same material as any of the electrodes and has the same thickness as the extraction electrode. The method of manufacturing an organic EL panel according to any one of claims 5 to 7, wherein the pseudo pattern is formed so as to block an outside light incident portion inside from the adhesion region.

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