KR20100003212A - Resin relief printing plate for relief printing, and process for producing organic el device obtainable thereof - Google Patents

Abstract

PURPOSE: A resin convex plate for printing a convex plate and a manufacturing method of an organic EL device are provided to stabilize The size accuracy of the organic light-emitting layer of an organic EL device although manufacturing plural organic EL elements on one resin convex plate. CONSTITUTION: A resin convex plate for printing a convex plate is composed of a prepolymer formed by adding acrylate to the polymerization addition product of diisocyanate and polyester polyol and a photoresist resin composition material formed by mixing monofunction or the multi-functional Polymer. The resin convex plate for printing a convex plate has the JIS rubber hardness within the range of the Shore A 60~90°. The resin convex plate for printing a convex plate is developed with water cleanser. The weight change rate of before and after immersion is the swelling ratio within the range of 0.2~15% after continuously dipping for 24 hours In the environment or less of the room temperature 20~25°C about anisole, cyclohexylbenzene, and tetralin or mixed solvent which is aromatic system solvent melting and dispersing organic EL luminous body.

Description

RESIN RELIEF PRINTING PLATE FOR RELIEF PRINTING, AND PROCESS FOR PRODUCING ORGANIC EL DEVICE OBTAINABLE THEREOF}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a convex printing resin convex plate used for printing an organic light emitting layer of an organic electroluminescence (hereinafter referred to as "organic EL") element and a method for producing an organic EL element obtained using the same.

In recent years, attention has been paid to organic EL devices having features such as thin type, low power consumption, and light weight as display elements such as mobile phones. This organic EL element is formed by forming an organic light emitting layer containing an organic EL light emitting body between two mutually opposing electrodes, and causes the organic light emitting layer to emit light by flowing a current through the organic light emitting layer.

The organic EL light-emitting body includes a low molecular material and a high polymer material. Usually, the organic light emitting layer is formed by vacuum deposition on a substrate using a low molecular material, but in this case, the pattern is formed using a mask of a fine pattern, so when the substrate is enlarged, the vacuum vapor deposition apparatus is enlarged, and the use efficiency of the material and There is a problem that the processing capacity and yield are greatly reduced. Therefore, in recent years, attempts have been made to form an organic light emitting layer on a substrate by a printing method by dissolving and dispersing it in a solvent using a polymer material as an organic EL light emitting material so as to cope with mass production even if the substrate is enlarged. (See, for example, Japanese Laid-Open Patent Publication No. 2006-252787). However, since all of the conjugated polymer compounds known as polymer materials are low in solubility, it is necessary to use aromatic compounds such as xylene and toluene as solvents for ink formation. Since this aromatic solvent has high swelling property with respect to some high molecular polymers, when it is going to form an organic light emitting layer by the offset printing method, it may swell in a solvent, for example, and there exists a possibility that size precision may fall by repeating a printing process.

On the other hand, the printing method includes various methods including the offset printing method, but since the organic EL element often uses a glass substrate as a substrate, an offset printing method using a rubber blanket having elasticity, or a rubber plate or resin plate having elasticity is used. Convex printing is preferred. However, in the offset printing method, the convex plate printing method is frequently employed because there is a possibility that the size accuracy of the rubber blanket described above may be reduced. In addition, even in this convex plate induction method, since there is a possibility of the rubber plate described above, a resin plate is used, and among them, a commercially available solid plate (for example, manufactured by Douresa) is often used.

However, since the solid plate is a resin convex plate obtained by evaporating and drying a soluble emulsion composition of a water-soluble polymer such as water-soluble nylon and polyvinyl alcohol and a photosensitive resin, the hardness thereof is hard and there is a problem of damage to the substrate during printing.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a resin convex plate for convex printing for stable size accuracy and small damage to a substrate during printing, and a method for producing an organic EL device obtained using the same, even if the printing process is repeated. For that purpose.

In order to achieve the above object, the present invention provides a convex printing resin convex plate comprising a prepolymer formed by adding an acrylate to a polymerization addition product of a polyester polyol and a diisocyanate and a photosensitive resin composition containing a monofunctional or polyfunctional monomer. Organic EL comprising the step of forming the organic light emitting layer by evaporating and evaporating the solvent after printing the printing ink in which the organic EL light-emitting body is dissolved in a solvent using the resin-convex printing plate for convex printing. The manufacturing method of a device is made into 2nd summary.

That is, the present inventors have intensively studied to obtain a resin convex plate for convex printing (hereinafter referred to as a "convex convex plate") that is stable in size and has a small damage to a substrate during printing even after repeated printing. When the sheet material is made of the prepolymer made by adding acrylate to the polymerization addition product of polyester polyol and diisocyanate, and the photosensitive resin composition which mix | blended monofunctional or polyfunctional monomer, the initial objective can be achieved. To the present invention. Since the resin material of the present invention is a photosensitive resin composition having a polyester-based skeleton, the resin convex plate does not swell so much with an aromatic solvent as compared with that of an aliphatic skeleton. It does not deteriorate and stable size precision is maintained over a long period of time. In addition, the hardness of the resin convex plate is soft, and damage to the substrate during printing is small.

In addition, since the organic light emitting layer is formed on the substrate using the resin convex plate in the method of manufacturing the EL element of the present invention, even if a large number of organic EL elements are manufactured on one resin convex plate, the size precision of the organic light emitting layer of the organic EL element obtained is Stable In addition, when the organic EL device is manufactured, there is little damage to the substrate, and there is no damage to the substrate.

(Best form for carrying out the invention)

Then, the best form for implementing this invention is demonstrated. However, this invention is not limited to this embodiment.

1 shows one embodiment of the resin convex plate of the present invention. In this embodiment, the resin convex plate is used for printing the organic light emitting layer 23 (see FIG. 7) on an organic EL element constituting an organic EL color display or the like (not shown), which will be described later. As shown in FIG. 3, which is an AA cross-sectional view, a plurality of printing convex portions 2 formed in a band shape on the substrate 1 and the pattern printing surface of the substrate 1 and protruding in parallel at predetermined intervals (pitch) are provided. Consists of Then, a plurality of minute projections (micro-convex portions) 3 are formed on the top surface of each of the printing convex portions 2, and the groove portions 4 are connected in series between the minute projections 3, respectively. Is formed, and printing ink (not shown) is held in this groove portion 4.

The said resin convex board has the JIS rubber hardness within the range of Shore A60-90 degrees, Preferably there is flexibility in the range of Shore A 65-80 degrees. If the JIS rubber hardness is greater than Shore A90 °, the hardness is too hard to damage the substrate. If the JIS rubber hardness is less than 60 °, the hardness is too flexible and the printing ink bleeds during printing, resulting in leakage of liquid, resulting in a clear image. There is a possibility that you can not.

In addition, the said resin convex plate can be developed with an aqueous detergent, and at the time of manufacture of the resin convex plate mentioned later, an uncured part is wash | cleaned with aqueous detergents, such as washing water.

Further, the resin convex plate is continuously immersed for 24 hours in an environment of 20 to 25 ° C. or less in an anisole, cyclohexylbenzene, or tetralin or an aromatic solvent which is an aromatic solvent for dissolving and dispersing an organic EL light emitter. The weight change rate before and after has the swelling rate in 0.2 to 15% of range. Thus, the said resin convex board does not swell very much with respect to an aromatic solvent. Therefore, even when using a printing ink obtained by dissolving and dispersing an organic EL light-emitting body in an aromatic solvent, the resin convex plate does not swell so much, so that the size precision of the resin convex plate does not deteriorate even after repeated printing processing, and stable size accuracy is maintained for a long time. maintain.

The weight change rate is preferably set in the range of 1 to 10%. When the said weight change rate exceeds 10%, there exists a possibility that the magnitude | size precision of a resin convex board may fall by repetition of a printing process. In addition, the lower the weight change rate is, the more preferable, and the lower the accuracy of the size is, if it is about 1%, is not so small, but considering the number of times of normal use, there is a fear that the accuracy of the size is lowered within the range of 5 to 7%. none. In addition, when using the mixed solvent of anisole, cyclohexylbenzene, or tetralin as an aromatic solvent, the compounding ratio is arbitrarily set. In addition, when the said weight change rate was measured, the thing which cut | disconnected the resin convex board of thickness 0.13-0.30 cm in the magnitude | size of 2 cm x 3 cm was used.

In addition, the resin convex plate preferably has a resin property of the maximum tensile force of 30 ~ 200N at 15 ~ 200% elongation, 2 ~ 100MPa tensile strength when cutting. If it exceeds this range, the rubber hardness rises, causing damage to the substrate as described above, and if it falls below, the rubber hardness decreases, causing the problem of leakage of liquid during printing as described above. .

For example, in the case of printing on a line, the shape of the minute protrusions 3 is preferably a cone or a cylinder shape (a cone object in FIGS. 2 and 3), and the minute protrusions (points) can be improved. 3) The height H ₁ is in the range of 1 to 500 µm, the diameter D ₁ of the top surface is in the range of 5 to 500 µm, and the interval W ₁ between adjacent minute protrusions 3 is 5. It is preferable to exist in the range of -500 micrometers.

In addition, as shown in FIG. 4 and FIG. 5 which is BB sectional drawing of FIG. 4 instead of the said micro protrusion 3, the several tendon provided in parallel at predetermined intervals in the top surface of the convex part 2 for printing. A tendon-shaped uneven portion formed of a tendon-shaped concave groove (tendon-shaped recess) 6 formed between a convex convex 5 of a shape and two adjacent tendon-shaped convex 5 is formed. You may be. The cross-sectional shape of the tendon-shaped convex 5 is preferably a trapezoidal or rectangular shape (a trapezoidal shape in FIGS. 4 and 5), and the height H of the tendon-shaped convex 5 in that transferability is better. ₂ ) is in the range of 1 to 500 μm, the width D ₂ of the top surface is in the range of 5 to 500 μm, and the groove width (concave groove) W _{2 of the} tendon-shaped concave groove 6 is 5 to It is preferable to exist in the range of 500 micrometers. In addition, when the organic light emitting layer 23 of an organic EL element is applied not to a display use but to an illumination use etc., it can respond to a printing plate by a monochromatic beta pattern of a front surface rather than the above line patterning.

Such a resin convex plate is manufactured from the prepolymer formed by adding acrylate to the polymerization addition product of polyester polyol and diisocyanate, and the photosensitive resin composition which mix | blended monofunctional or polyfunctional monomer as a board | plate material.

Examples of the polyester polyols include polyester copolymers obtained by condensation polymerization of dicarboxylic acids and polyols composed of saturated fatty acids, unsaturated fatty acids, aromatic acids and the like.

Here, the polyol refers to an alcohol having two or more hydroxyl groups in one molecule, and specific examples thereof include ethylene glycol, propylene glycol, diethylene glycol, and the like, and are used singly or together.

Moreover, as said diisocyanate, use of aliphatic, alicyclic, and aromatic diisocyanate is possible, for example, 2, 4- trienedi isocyanate, 2, 6-trienedi isocyanate, 4,4'- diphenyl Methane diisocyanate, 4,4'-dicyclohexyl methane diisocyanate, dianisidine isocyanate, 3,3'-ditriene-4,4'-diisocyanate, p-xylene diisocyanate, 1,3-cyclo Hexanedimethylisocyanate, 1,5-naphthalene diisocyanate, transvinylene diisocyanate, 2,6-diisocyanate methyl caproate, diphenyl ether-4,4'- diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, etc. Can be mentioned. As a method of polymerizing-adding such polyester polyol and diisocyanate, a conventionally well-known method is used.

As said acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, polyethyleneglycol mono (meth) acrylate, etc. are mentioned, for example.

The addition of the acrylate to the prepolymer is carried out, for example, by a conventionally known kraft polymerization method (tree polymerization method) or the like. Here, the addition ratio of the acrylate to the prepolymer is usually set within the range of 0.5 to 5.0 moles of acrylate relative to 1 mole of the prepolymer. When the addition ratio of the acrylate exceeds the above range, there is a tendency that a problem in which the rubber hardness of the resin convex plate rises occurs, and when it is less, the problem that the formation of the resin convex plate is impossible occurs.

As the monofunctional or polyfunctional monopolymer, 1,3 or 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, diethylene glycol diacrylate, neopentyl glycol diacrylate, polyethylene glycol di Acrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, dipentaerythritol hexaacrylate, 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxy Various monomers, including a 3-phenoxypropyl acrylate, are mentioned.

The blending ratio of the prepolymer formed by adding the acrylate to the polymerization addition product and the monofunctional or polyfunctional monomer is arbitrarily blended according to the purpose of achieving a predetermined hardness, flexibility and swelling ratio. Moreover, a photoinitiator is mix | blended with these prepolymers and a monomer blade body in the range of 0.001 to 10 weight% with respect to a blade body.

The photosensitive resin composition may be in a liquid phase, a solid phase or a powder phase, and in the case of a solid phase or a powder phase, the photosensitive resin composition is in a liquid phase at the time of use.

By using such a plate material, the said resin convex board can be manufactured as follows, for example. That is, first, the negative film 11 shown in FIG. 6 is prepared. In the area | region corresponding to the said resin convex plate, this negative film 11 is formed in the round hole 11a in the part corresponding to the micro protrusion 3 of this convex plate, and the inside of this round hole 11a is transparent, And other portions are black. Subsequently, the negative film 11 is laminated on the surface of the lower glass substrate 12, and then the photosensitive resin composition having a liquid polyester skeleton is coated on the surface of the negative film 11 so as to have a constant thickness. do. In FIG. 6, this application layer is shown with the code | symbol "13", The scheduled part to be uncured mentioned later among this coating layer 13 is shown with the code | symbol "13a", The scheduled part to be hardened is shown with the diagonal part S. In FIG. have. Subsequently, a transparent base film (not shown) is laminated on the surface of the coating layer 13, and the upper glass substrate 14 is laminated on the surface of the base film.

Subsequently, as shown in FIG. 6, light such as ultraviolet rays is irradiated through the upper glass substrate 14 and the base film using the lamp 15, and further, the lower glass substrate 12 and the negative film 11 are used. Irradiate light such as ultraviolet rays through. Thereby, the part which the light which entered the whole upper surface of the layer which consists of the said photosensitive resin composition 13, and the light which entered the round hole 11a of the negative film 11 reached | attached (diagonal part S of FIG. 6) hardens | cures do. At this time, the depth at which the light reaches is controlled by the intensity of the light to be irradiated. Subsequently, the upper and lower glass plates 12 and 14 and the negative film 11 are removed, and light is not reached due to the black portion of the negative film 11, and the uncured portion (uncured portion) is washed with a developer and removed. And after drying a hardened part, a fine line etc. are hardened | cured certainly by irradiating (post-exposure) light, such as an ultraviolet-ray, to the formation side of the micro projection 3. In this way, the resin convex plate shown in FIG. 1 can be manufactured.

As described above, in this embodiment, since the plate material is a photosensitive resin composition having a polyester-based skeleton having high polarity, the resin convex plate produced using the plate material hardly swells with respect to the aromatic solvent. Therefore, even if it repeats printing process, the size precision of the said resin convex board does not fall, and stable size precision is maintained over a long term. Moreover, the hardness of the said resin convex board is comparatively soft, and there is little damage to the board | substrate of the to-be-printed body at the time of printing.

FIG. 7 shows an embodiment of an organic EL device manufactured using the resin convex plate. In this embodiment, the organic EL element is formed by forming a transparent or translucent anode 22, an organic light emitting layer 23, and a cathode 24 on the surface of the glass substrate 21. This element emits light by flowing a current through the organic light emitting layer 23 formed between the anodes 22 and 24 by the voltage supplied from the power supply 25 connected between the anodes 22 and 24. And this EL light is displayed through the glass substrate 21. In addition, the organic light emitting layer 23 has three types of red (R), green (G), and blue (B). The organic light emitting layer 23 of each color is formed in a band shape and is provided in parallel at predetermined intervals. , Red, green, and blue are repeated. When printing one color organic light emitting layer 23, one resin convex plate is used, and a resin convex plate corresponding to the number of organic light emitting layers 23 is used.

The said organic electroluminescent element is manufactured as follows, for example. That is, first, the anode 22 is formed on the surface of the glass substrate 21. In this step, the transparent anode 22, such as indium tin oxide (ITO) or zinc oxide, is coated on the surface of the glass substrate 21 by vacuum deposition, sputtering, or the like to form a transparent anode 22, or gold or platinum Thin deposition is performed to form the translucent anode 22.

Subsequently, a hole transporting layer and an organic light emitting layer 23 are sequentially formed on the anode 22 by the conventional convex printing method using the resin convex plate. In the formation process of this organic light emitting layer 23, first, three types of printing inks, red, green, and blue obtained by dissolving and dispersing an organic EL light-emitting body in an aromatic solvent are prepared. Moreover, the doctor 35 which scrapes off the printing ink which is an excess on the printing roll 31, the anilox roll 32, the printing stage 33, the ink supply apparatus 34, and the anilox roll 32 shown in FIG. Prepare a printing machine equipped with). Subsequently, the resin convex plate is mounted on the inlay roll 31, and the glass substrate 21 on which the anode 22 (not shown) is formed is mounted on the printing stage 33. Subsequently, printing ink of any color (for example, red) is supplied from the ink supply device 34 to the anilox roll 32 to rotate the printing roll 31 and the anilox roll 32. At this time, the printing ink is held in the groove portion 4 of the top surface of the printing convex portion 2 of the resin convex plate. Subsequently, the printing stage 33 is moved in synchronization with the rotation of the printing roll 31, and after printing printing ink of an arbitrary color on the anode 22 on the surface of the glass substrate 21, it is heated to The aromatic solvent is evaporated to evaporate to form the organic light emitting layer 23. Such printing is performed in the same manner as for the other two colors, respectively, and the organic light emitting layer 23 of three colors is formed at a predetermined position.

Subsequently, a cathode 24 is formed on the organic light emitting layer 23. The cathode 24 is made of a single metal element such as Li, Na, Mg, La, Ce, or Ca. In the process of forming the cathode 24, the electrode is co-deposited on the organic light emitting layer 23 by a resistive heating method under a predetermined vacuum degree and monitored by a crystal oscillator film thickness from a separate deposition source for each element of the metal element. Thereafter, the anodes 22 and 24 are connected to the power source 25. In this manner, the organic EL device is manufactured.

According to such a manufacturing method, the size precision of the organic light emitting layer 23 of the organic electroluminescent element obtained even if many organic electroluminescent element is manufactured with one resin convex plate is stable. Moreover, the damage to the board | substrate at the time of organic electroluminescent element manufacture is small, and the glass substrate 21 is not damaged.

The organic EL light-emitting body has a viscosity in the range of 2 to 100 mPa · s, and a low molecular material or a high molecular material is used. Examples of the low molecular weight materials include triphenylbutadiene, coumarin, nile, and oxadiazole derivatives. As the polymer material, for example, poly (2-decyloxy-1,4-phenylene) (DO-PPP), poly [2- (2'-ethylhexyloxy) -5-methoxy-1, 4-phenylenevinylene] (MEH-PPV), poly [5-methoxy- (2-propanoxylsulfonide-1,4-phenylenevinylene] (MPS-PPV), poly [2,5- Bis (hexyloxy-1,4-phenylene)-(1-cyanovinylene)] (CN-PPV), poly [2- (2'-ethylhexyloxy) -5-methoxy-1, 4-phenylene- (1-cyanovinylene)] (MEH-CN-PPV), poly (dioctyl fluorene), etc. Moreover, as a solvent used for this, cyclohexyl benzene, a trichloro, for example is mentioned. Robenzene, anisole, xylene, ethyl benzoate, cyclohexylpyrrolidone, butyl cellosolve, dichlorobenzene, toluene, etc., and these are used alone or in combination of two or more thereof. It is determined by the organic light emitting layer 23.

(Example)

Then, an Example is described.

The resin convex board of the structure shown in FIGS. 1-3 was prepared. The JIS rubber hardness of this resin convex plate was Shore A 85 degrees, and the weight change rate was 5% continuously immersed in anisole for 24 hours at 23 degreeC of room temperature. Such a resin convex plate was manufactured by the same method as the manufacturing method of the said resin convex plate using the board | plate material shown in following Table 1, plate total thickness was 1.3 mm, and substrate thickness was 0.7 mm.

Plate total thickness (mm) Rubber hardness (°) % Change in weight Tensile strength (MPa) Elongation at Cutting (%) Material A 1.30 88 1.5 2.4 20 Material B 1.30 84 3.1 3.6 30 Material C 1.30 90 4.2 2.4 25

(Note 1) The rubber hardness is based on JIS K6253 "Rubber hardness test method".

       It measured by Danbell shape No.3.

(Note 2) Tensile strength and elongation at the time of cutting are based on JIS K6251 "Tension test method of rubber".

(Note 3) The weight change rate was measured by the weight before and after continuously immersing a test member of 1.3 mm x 20 mm x 30 mm for 24 hours in a room temperature environment of 23-25 degreeC.

As a printing machine, the one shown in FIG. 8 (the Frekiso printing machine made by MT Tech, FC33S) was prepared. As for the printing conditions, the nip width between the resin convex plate and the anilox roll was adjusted to 3.5-6.5 mm, the nip width between the resin convex plate and the glass substrate was adjusted to 7.5-12.5 mm, and the printing speed was adjusted to 20 m / min.

As a pseudo ink, anisole and tetralin were mixed in a one-to-one manner, and 0.2-1.5 wt% of polyvinylcarsol (manufactured by Kanto Chemical Co., Ltd., molecular weight 90,000) was used. This pseudo ink was transported by 0.01-0.1 MPa dry air and adjusted to supply on an anilox roll by 0.5-5 ml in 40 second.

The resin convex plate was mounted on a plate body of a printing machine, the printing machine was driven at the printing conditions and printing speed, and after printing pseudo ink on a glass substrate for constructing an organic EL element, the resin was heated to 60 to 90 ° C. Anisole and tetralin were evaporated and removed on a hot plate, and only the active ingredient was precipitated to obtain an organic light emitting layer.

As a result of measuring this organic light emitting layer with an optical interference microscope, the film thickness of 400-700 GPa was measured. It was also confirmed that the pseudo ink was emitted by bringing the ultraviolet lamp closer to the film surface, and the organic EL light-emitting body was applied.

1 is a side view showing an embodiment of the resin convex plate of the present invention;

2 is an enlarged plan view of a main portion of the resin convex plate;

3 is a cross-sectional view taken along line A-A of FIG.

4 is an enlarged plan view of a main portion showing a modification of the resin convex plate;

5 is a cross-sectional view taken along line B-B of FIG. 4;

6 is an explanatory diagram showing a manufacturing method of the resin convex plate;

7 is an explanatory diagram showing an embodiment of an organic EL element, and

8 is an explanatory diagram showing a method for manufacturing the organic EL device.

* Explanation of symbols for the main parts of the drawings

2: convex for printing 3: micro projection

4 groove 5 convex

11: Negative Film 15: Lamp

Claims (6)

A resin convex plate for a convex printing comprising a prepolymer formed by adding an acrylate to a polymerization addition product of a polyester polyol and a diisocyanate and a photosensitive resin composition containing a monofunctional or polyfunctional polymer as a sheet material. The method of claim 1, Hardness itself is set within the range of Shore A 60-90 degrees by JIS rubber hardness, and it can develop with an aqueous detergent, The resin convex plate for convex printing. The method according to claim 1 or 2, Anisole, cyclohexylbenzene, tetralin, or a mixed solvent which is an aromatic solvent that dissolves and disperses the organic EL light emitting body is continuously immersed for 24 hours in an environment of 20 to 25 ° C at room temperature, and the weight change rate before and after immersion is 0.2. A convex plate printing resin convex plate having a swelling ratio within a range of -15%. The method according to claim 1 or 2, A resin convex plate for convex printing, characterized in that it has a resin property with a maximum tensile strength of 30 to 200 N at 15 to 200% elongation and 2 to 100 MPa of tensile strength during cutting. The method according to claim 1 or 2, A convex portion for printing the pattern printing surface, and having a concave portion width of 10 to 500 µm for holding the printing ink on the surface thereof, or a minute portion having a convex diameter of 10 to 500 µm ( Micro-convex printing resin convex plate for which the convex part is formed. A printing ink in which an organic EL light-emitting body is dissolved in a solvent using the resin convex plate for convex printing according to claim 1 or 2 is printed on a substrate, and then evaporating and evaporating the solvent to form an organic light-emitting layer. The manufacturing method of the organic electroluminescent element characterized by the above-mentioned.

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