JP4645311B2 - Organic EL element manufacturing method and organic EL element manufacturing apparatus - Google Patents

Description

  The present invention relates to a method for manufacturing an organic EL element in which an organic light emitting material is a polymer material, and particularly relates to a method for manufacturing an organic EL element in which an organic light emitting layer is formed by a relief printing method.

  An organic EL element is one in which an organic light emitting layer made of an organic light emitting material is formed between two opposing electrodes, and light is emitted by passing a current through the organic light emitting layer. The film thickness is important, and it is necessary to form a thin film of about 100 nm. Further, in order to make this a display, it is necessary to pattern it with high definition.

  Organic light-emitting materials include low-molecular materials and high-molecular materials. In general, low-molecular materials are formed into thin films by resistance heating vapor deposition or the like, and then patterned using a fine pattern mask. There is a problem that the patterning accuracy is less likely to increase as the size increases.

  Therefore, recently, a method of using a polymer material as an organic light emitting material, dissolving the organic light emitting material in a solvent to form a coating liquid, and forming a thin film by a wet coating method has been tried. As the wet coating method for forming a thin film, there are a spin coating method, a bar coating method, a protruding coating method, a dip coating method, and the like. However, it is considered difficult to form a thin film by a printing method that is good at coating and patterning.

  Further, among various printing methods, organic EL elements and displays often use a glass substrate as a substrate, so that a method using a hard plate such as a metal printing plate such as a gravure printing method is not suitable. An offset printing method using an elastic rubber blanket and a relief printing method using an elastic rubber plate or a photosensitive resin plate are also appropriate. Actually, as an attempt by these printing methods, a method by offset printing (Patent Document 1), a method by letterpress printing (Patent Document 2), and the like have been proposed.

The patent literature is as follows.
Japanese Patent Laid-Open No. 10-77467 JP 2001-155858 A

  When an organic EL element is manufactured using the offset printing method using the rubber blanket having elasticity as described above, or the relief printing method using the rubber plate or photosensitive resin plate having the same elasticity, distortion due to expansion and contraction of the rubber and the resin is caused. As a result, high-definition printing has been difficult. Therefore, there has been a demand for a high-definition printing method that does not cause distortion due to the expansion and contraction of the material despite printing using such a stretchable material.

In this invention concerning Claim 1, the organic light emitting layer manufacturing process in the manufacturing method of an organic EL element WHEREIN: The relief plate for organic EL element manufacture by which at least several solvent-proof convex part was continuously formed on the surface periphery was used. An organic EL element manufacturing method for printing an organic light emitting material on a substrate to be transferred using a printing cylinder provided with an ink containing an organic light emitting material supplied from an ink replenishing device to an anilox roll. Supplying the ink onto the relief printing plate for producing the organic EL element, and supplying the ink from the relief printing plate for producing the organic EL element to the transfer substrate, wherein the ink replenishing device is a die coater or a slit coater. The manufacturing method of the organic EL element characterized by the above is provided.

In this invention concerning Claim 2, the organic light emitting layer manufacturing process in the manufacturing method of an organic EL element WHEREIN: The relief plate for organic EL element manufacture by which the several convex part of solvent resistance was continuously formed on the surface periphery was used. A method for manufacturing an organic EL element that performs printing of an organic light emitting material on a substrate to be transferred using a printing cylinder provided,
An ink containing an organic light-emitting material is supplied from an ink replenishing device to an anilox roll, excess ink on the anilox roll is removed by a doctor device, and the ink is supplied from the anilox roll onto the relief plate for producing the organic EL element. , Having the step of supplying the ink from the relief printing plate for organic EL element production to the substrate to be transferred,
The doctor apparatus is a doctor roll, and provides a method for producing an organic EL element .

According to a third aspect of the present invention, there is provided a method for manufacturing an organic EL element according to the first or second aspect , wherein printing is performed through a mask having a predetermined pattern. To do.

  In this invention which concerns on Claim 4, in the manufacturing method of the organic EL element in any one of Claim 1 to 3, the solvent-resistant convex part is a solvent-resistant polymer | macromolecule, The manufacturing method of this is provided.

  In this invention which concerns on Claim 5, in the manufacturing method of the organic EL element in any one of Claim 1 to 4, it divides | segments into a some cylinder in a horizontal direction, and it prints, The organic EL element characterized by the above-mentioned A manufacturing method is provided.

In this invention which concerns on Claim 6, in the manufacturing method of the organic EL element in any one of Claim 1 to 4, it divides | segments into a horizontal direction and prints sequentially, The manufacturing method of the organic EL element characterized by the above-mentioned It is to provide.
In the present invention according to claim 7, using a printing cylinder provided with a relief printing plate for producing an organic EL element in which at least a plurality of solvent-resistant projections are continuously formed on the surface circumference, to a transfer substrate An organic EL element manufacturing apparatus for printing ink containing an organic light emitting material, comprising an ink replenishment apparatus, an anilox roll for inking the organic EL element manufacturing letterpress, and a printing for organic EL element manufacturing letterpress An organic EL element manufacturing apparatus, wherein the ink replenishing device is either a slit coater or a die coater.
Moreover, in this invention which concerns on Claim 8, using the printing cylinder provided with the relief plate for organic EL element manufacture in which the at least some solvent-proof convex part was continuously formed on the surface periphery, to a to-be-transferred substrate An organic EL element manufacturing apparatus for printing ink containing an organic light-emitting material, an ink replenishing apparatus, an anilox roll for inking the relief plate for manufacturing the organic EL element, and excess ink on the anilox roll is removed. The organic EL element manufacturing apparatus is characterized in that the doctor apparatus is a doctor roll, and a printing cylinder provided with a relief printing plate for manufacturing an organic EL element, and the doctor apparatus is a doctor roll.
Further, in the present invention according to claim 9, the organic EL element manufacturing according to claim 7 or 8, wherein a plurality of printing cylinders provided with the relief plate for manufacturing the organic EL element are provided in the lateral direction. A device is provided.

  According to the first aspect of the present invention, distortion due to expansion and contraction of the plate material during printing is unlikely to occur, and a high-definition printing method in which dimensional accuracy is ensured is possible, and a high-definition organic EL element can be obtained.

  The present invention according to claim 2 enables not only a high-definition printing method in which distortion due to expansion and contraction of the plate material does not occur, but also the printing of non-continuous patterns. In addition, if the pixel sizes are the same, it becomes possible to form organic EL displays having different screen sizes using the same plate. As a result, the time required for plate replacement and the cost related to plate manufacture can be greatly reduced.

  In the present invention according to claim 3, in addition to the dimensional accuracy in the circumferential direction of the printing cylinder obtained in the invention according to claim 1, dimensional accuracy in the axial direction of the cylinder can be obtained. In particular, since the cylinder that prints at a time is smaller than the axial direction, even if the cylinder expands / contracts or distorts, it only expands / contracts / distorts according to the size of the cylinder and forms as a pixel. Dimensional stability related to the pixel interval of the pattern to be formed is improved.

  In the present invention according to claim 4, it is possible to print even on a hard material to be transferred such as glass or metal by having a flexible polymer layer as a convex portion.

  In the present invention according to claim 5, it is possible to provide a solution for performing full width printing using the cylinder according to claim 1.

  In the present invention according to claim 6, it is possible to provide a solution for performing full width printing using the cylinder according to claim 1 in a different manner from that of claim 5. Further, as an effect common to the fifth and sixth aspects, a large-screen organic EL display can be manufactured in a space-saving manner.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  This embodiment will be described below with reference to FIG. 1 using an example in which the printing cylinder is one of the seamless relief plates for manufacturing organic EL elements. A shows the outer shape of the seamless relief printing, and B shows a cross-sectional view thereof. The seamless letterpress in this case means a cylinder without a joint, and a convex part is formed on the cylinder 1. The material of the cylinder 1 can be metal, rubber, resin, or the like, but it is desirable to use a metal cylinder that is small in size change with respect to changes in the printing environment such as temperature and humidity.

  The convex part 2 is only required to have solvent resistance to the ink used, and it is possible to use nitrile rubber, silicone rubber, isoprene rubber, styrene butadiene rubber, butadiene rubber, chloroprene rubber, butyl rubber, acrylonitrile rubber, ethylene propylene rubber, urethane rubber, etc. In addition, synthetic resins such as polyethylene, polystyrene, polybutadiene, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyamide, polyethersulfone, polyethylene terephthalate, polyethylene naphthalate, polyethersulfone, polyvinyl alcohol, and copolymers thereof One or more types can be selected from natural polymers such as cellulose, but fluorine-based elastomers, polytetrafluoroethylene, polyvinylidene fluoride, poly (vinylidene fluoride) and so on. It may be used fluorine-based resin such et copolymer.

  The convex portion is formed by laser processing on a rubber layer or a resin layer uniformly formed on the cylinder. Further, when a photosensitive resin is used, the convex portion is formed by a photolithography method.

  Moreover, it is preferable that the full width of a convex part is 20000 times or less with respect to the pattern width formed. When it exceeds 20000 times, depending on the material of the convex portion, it becomes impossible to obtain a desired printing accuracy due to expansion and contraction of the material at the time of printing.

  Next, the manufacturing method of the organic EL element using the relief plate for manufacturing the organic EL element of the present invention will be described.

  FIG. 3 shows an example of an organic EL element manufacturing apparatus using the letterpress. For example, as shown in FIG. 3, the ink 13 containing the organic light emitting material is replenished from the ink replenishing device 11 to the anilox roll 12 that is an inking device to the relief printing plate, and the ink 13 containing the organic light emitting material supplemented to the anilox roll 12 Can be removed by the doctor device 14. As the ink replenishing device, a coater such as a fountain roll, a slit coater, a die coater, a cap coater, or a combination thereof can be used in addition to the dropping type replenishing device. In addition to the doctor roll, a doctor blade can be used for the doctor device 14.

  After excess ink is removed by the doctor device 14, at least the surface is inked into the cylinder 15 whose surface is a relief printing plate for producing an organic EL element. The inking to the relief printing plate for producing an organic EL element may be performed at least on the image forming portion of the plate. The ink that has been inked to the relief printing plate for producing the organic EL element is printed on the transfer medium 16. As a base material of the transfer object 16, a translucent substrate such as a film having a barrier property against water vapor or the like can be used in addition to glass. The ink 13 containing the organic light emitting material printed on the transfer body 16 is dried to form an organic light emitting layer.

FIG. 2 is a schematic perspective view showing an example in which a printing state using the printing cylinder of the present invention is shown by a single printing cylinder. Reference numeral 21 denotes a patterned organic light emitting layer. In this case, if full width printing is performed with a single cylinder, there is no difference from conventional printing, so printing is performed by dividing the area in the width direction of printing. As a specific method, there are a method of sequentially printing while increasing the number of cylinders, and a method of sequentially printing one cylinder while changing its position.

  FIG. 4 shows an example of the organic EL element manufactured by the organic EL element manufacturing apparatus of FIG. 4A is a view of the organic EL element as viewed from above, and FIG. 4B is a cross-sectional view of the organic EL element.

  The organic light emitting layer 21 formed by printing may be present uniformly on at least the transparent conductive layer 23 that is an image forming portion on the translucent substrate 22.

  The present invention is suitable for high-definition pattern printing, and particularly suitable for printing electronic materials. For example, FIG. 4C shows one light emitting unit of the organic EL element obtained by this manufacturing method. One light emitting unit of the organic EL element includes a translucent substrate 31, a transparent conductive layer 32, a hole injection layer 33, an organic light emitting layer 34, and a cathode layer 35.

  In one light emitting unit of the organic EL element, a glass substrate or a plastic film or sheet can be used as the translucent substrate 31. If a plastic film is used, an organic light emitting device can be manufactured by winding, and the device can be provided at low cost. As the plastic, for example, polyethylene terephthalate, polypropylene, cycloolefin polymer, polyamide, polyethersulfone, polymethyl methacrylate, polycarbonate and the like can be used. Moreover, you may laminate | stack other gas barrier films, such as a ceramic vapor deposition film, a polyvinylidene chloride, a polyvinyl chloride, an ethylene-vinyl acetate copolymer saponified material, on the side which does not form the transparent conductive layer 32 into a film.

  Examples of the material forming the transparent conductive layer 32 include a composite oxide of indium and tin (hereinafter referred to as ITO). In addition, a semi-transparent metal such as aluminum, gold, or silver, or an organic semiconductor such as polyaniline may be used.

  Examples of the material forming the hole transport layer 33 include conductive polymer materials such as polyaniline derivatives, polythiophene derivatives, polyvinylcarbazole derivatives, and a mixture of poly (3,4-ethylenedioxythiophene) and polystyrenesulfonic acid.

  The organic light emitting layer 34 is a layer containing an organic light emitter, and emits light when a voltage is applied. Examples of organic light emitting materials include coumarin, perylene, pyran, anthrone, porphyrin, quinacridone, N, N′-dialkyl substituted quinacridone, naphthalimide, N, N′-diaryl substituted pyrrolopyrrole. Organic light-emitting materials soluble in organic solvents such as iridium complexes, organic light-emitting materials dispersed in polymers such as polystyrene, polymethyl methacrylate, polyvinyl carbazole, polyarylenes, polyarylene vinylenes, Examples thereof include polymer organic light emitting materials such as polyfluorene-based materials.

  As the material for forming the cathode layer 35, materials according to the light emission characteristics of the organic light emitting medium layer can be used. For example, simple metals such as lithium, magnesium, calcium, ytterbium, and aluminum, oxides thereof, gold, silver, and the like can be used. Examples include alloys with stable metals. Alternatively, a conductive oxide such as indium, zinc, or tin can be used.

  In order to manufacture the above-described organic EL element using the present invention, the object to be transferred 26 is obtained by laminating a transparent conductive layer 32 and a hole transport layer 33 on a translucent substrate 31, and organic light emission as ink. Use ink containing material.

  Finally, in order to protect these laminates from external oxygen and moisture, a glass cap and an adhesive are hermetically sealed to obtain an organic EL element (not shown). Moreover, when a translucent board | substrate has flexibility, sealing sealing is performed using a sealing agent and a flexible film.

  The ink containing the organic light emitting material is supplied to the convex portion of the relief printing as described above, and is printed on the transfer substrate 26 described above. Solvents used in inks that dissolve or disperse luminescent materials include, for example, toluene, xylene, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, methanol, ethanol, isopropyl alcohol, ethyl acetate, butyl acetate, chloroform, chloride. Examples thereof include methylene, dichloroethane, trichloroethane, tetrachloroethylene, water alone or a mixed solvent thereof. In particular, aromatic solvents and halogen solvents are excellent for dissolving organic light emitting materials. Moreover, surfactant, antioxidant, a viscosity modifier, a ultraviolet absorber, a desiccant, etc. may be added to the ink containing an organic luminescent material as needed.

  The case of actual manufacture using this apparatus and material will be described in order below with reference to FIGS. Of course, the present invention may be a rotary type.

  First, as shown in FIG. 5, an electrode forming portion 43 is provided in a pattern on the transfer substrate 41, and a mask 42 having a pattern in which the electrode forming portion 43 is an opening is overlaid. As a result, only the electrode forming portion 43 of the transferred substrate is exposed on the surface. The alignment between the electrode forming portion 43 of the transferred substrate 41 and the opening of the mask 42 may be performed by matching the alignment mark formed on the transferred substrate with the alignment mark formed on the mask. The mask 42 may be of any material as long as it is not distorted or torn, but a known film material such as PET, PEN, PES, PE, polyvinyl chloride, and polyvinylidene chloride is used in addition to the metal foil. Moreover, it is preferable that the thickness is 500 micrometers or less. Moreover, the metal foil and the film material may be provided with an adhesive layer for fixing to the transfer substrate.

  Next, a hole transport layer is provided. For example, patterning by vapor deposition may be performed, but in addition to wet coating methods such as spin coating, slit coating, dip coating, cast coating, die coating, and spray coating, letterpress printing and intaglio printing It is desirable to use a printing method such as a printing method, a lithographic printing method, a stencil printing method, or an ink jet method. Thus, a hole transport material is provided on the mask 42 in a region where the mask 42 is present, and a hole transport layer 44 is provided on the transfer substrate 41 via the electrode forming portion 43 in the opening of the mask 42.

  Next, the organic light emitting material is printed using the printing cylinder 43 while leaving the mask 42 as it is. This method is a method as described later. As a result, in a region where the mask 42 is present, an organic light emitting material is provided in a pattern on the hole transport material on the mask 42, and in the opening of the mask 42, the electrode forming portion 43 is formed on the transfer substrate 41. An organic light emitting material is printed in a pattern on the hole transport layer, whereby the organic light emitting layer 45 is provided.

  After this printing is completed, the mask 42 is peeled off from the transfer substrate 41 by hand or by a dedicated machine as shown in FIG. Next, a cathode layer is provided. Depending on the material, the cathode can be formed by a resistance heating vapor deposition method, an electron beam method, or a sputtering method, and can be patterned as necessary through a mask.

  The main printing methods are a method of performing printing by dividing into a plurality of cylinders in the horizontal direction and a method of performing printing by dividing in the horizontal direction and sequentially. Of course, it is also effective to combine both methods as necessary.

  As a method of performing printing by dividing into a plurality of cylinders 51 in the horizontal direction, a method of printing a plurality of cylinders in the horizontal direction by shifting in the flow direction as shown in FIG. As a result, the print pattern 52 is formed over the entire pattern width formed in parallel. In this case, the shift amount of the cylinder may be appropriate, but it is appropriate that the distance between the cylinders is equal to the pixel pitch between the pattern at the end of one cylinder and the pattern at the end of the adjacent cylinder. . In this case, it is necessary to maintain parallelism between the cylinders, and each cylinder is installed at a predetermined position of each printing machine while observing with a camera based on at least a cross-shaped alignment mark. .

  As a method of performing printing sequentially on the transfer substrate 55 using the same cylinder 53 divided in the horizontal direction, the printing is performed by sequentially shifting the cylinder width from the end as shown in FIG. As an alignment method, the alignment mark formed on the cylinder surface is viewed with a camera. As a result, the print pattern 54 is formed over the entire pattern width formed in parallel.

  In addition, about the pattern to be printed, although it demonstrated by the method which provided the annular | circular shaped convex part along the circumference and provided the line-shaped pattern as demonstrated above, it is not restricted to such a pattern. Of course, any continuous pattern may be used as long as the convex portions are continuously formed on the surface circumference. Specifically, a dot pattern or the like may be used.

  The height of the projection is not particularly specified, but 10 μm or more is appropriate.

[Preparation of luminescent coating solution for forming organic luminescent layer]
The polymeric fluorescent substance was dissolved in xylene so that the concentration of the coating solution was 1.0% by weight to prepare a light emitting coating solution for forming an organic light emitting layer. Here, the polymeric fluorescent substance refers to a light emitting material made of a poly (paraphenylene vinylene) derivative.

[Manufacture of transferred substrate]
Poly (3,3) is used as a hole transport layer using a spin coater on a base material (manufactured by Geomat Co., Ltd.) formed by depositing ITO having a surface resistivity of 15 Ω / □ on a 150 mm square and 0.4 mm thick glass substrate. 4) Ethylenedioxythiophene / polystyrene sulfonic acid (PEDOT / PSS) was deposited to a thickness of 100 nm. Furthermore, this transferred glass substrate was dried at 100 ° C. for 1 hour under reduced pressure to produce a transfer substrate 3.

[Manufacture of seamless letterpress]
Applying a resin material onto a metal cylinder with a solvent-resistant seamless resin relief plate with a cylinder diameter of 50 mm, provided with an annular pattern with the convex part 2 having a width of 120 μm, a height of 100 μm, the concave part having a width of 380 μm, and the resin part having a total width of 120 mm Then, it was formed by ablation with a laser.

[Formation of organic light-emitting layer by seamless relief]
As a device for manufacturing an organic EL element, a flexo proofing machine is equipped with the above-mentioned seamless resin relief printing, and by using the luminescent coating liquid 4 for forming an organic luminescent layer, parallel lines are continuously provided in parallel. By forming a pattern, printing was performed on the transfer substrate 3 with a pattern width of 150 mm as a whole, and then drying was performed at 130 ° C. for 1 hour. An organic EL device was manufactured by depositing 5 nm of calcium on the organic light-emitting layer formed by printing, and further vacuum-depositing silver on it to 250 nm. When the light emission characteristics of the organic EL element were observed, uniform light emission was observed over the entire light emitting surface.

  Unlike Example 1, seamless relief printing is an example of the upper limit of the resin width.

[Formation of organic light-emitting layer by seamless relief]
As an organic EL device manufacturing equipment, a flexo proofing machine is equipped with an in-house solvent-resistant seamless resin relief plate with a convex part of 120 μm, a concave part of 380 μm, a resin part total width of 2400 mm, and a cylinder diameter of 50 mm, for forming an organic light emitting layer The luminescent coating solution 4 was used to print a 2400 mm square transfer substrate prepared in the same manner as the transfer substrate 3 and then dried at 130 ° C. for 1 hour. After drying, a 5 nm film of calcium was formed on the organic light-emitting layer formed by printing, and silver was further vacuum-deposited thereon at 250 nm to produce an organic EL device. When the light emission characteristics of the organic EL element were observed, uniform light emission was observed over the entire light emitting surface.

  Note that the parts not specifically mentioned are the same as those in the first embodiment.

  An example of pattern printing with a mask using a seamless relief is shown below.

[Mask formation]
A predetermined position of a PET film having a thickness of 100 μm and a 150 mm square was cut out with a cutter knife to form a mask for covering the non-pixel forming portion of the transferred substrate.

[Formation of organic light-emitting layer by seamless relief]
As an organic EL device manufacturing equipment, a flexo proofing machine is equipped with an in-house solvent-resistant seamless resin relief plate with a convex part of 120 μm, a concave part of 380 μm, a resin part total width of 150 mm, and a cylinder diameter of 50 mm. A mask made of PET film that matches the ITO pattern of the substrate to be transferred 3 is manufactured using the light emitting coating liquid 4 for printing, and after printing on the substrate to be transferred 2 through the mask, 130 Drying was performed at 0 ° C. for 1 hour. After drying, the mask was peeled off manually, and 5 nm of calcium was formed on the organic light emitting layer formed by printing, and then silver was vacuum-deposited on the film to form an organic EL device. When the light emission characteristics of the organic EL element were observed, uniform light emission was observed over the entire surface of the pattern portion.

  Note that the parts not specifically mentioned are the same as those in the first embodiment.

  An example of printing a large area by arranging seamless relief plates will be described below.

[Formation of organic light-emitting layer by seamless relief]
As an organic EL device manufacturing equipment, a flexo proofing machine is equipped with two in-house solvent-resistant seamless resin relief plates side by side with a convex part of 120 μm, a concave part of 380 μm, a resin part total width of 75 mm, and a cylinder diameter of 50 mm. After printing on the substrate 3 to be transferred using the light emitting coating liquid 4 for forming an organic light emitting layer, drying was performed at 130 ° C. for 1 hour. After drying, a 5 nm film of calcium was formed on the organic light-emitting layer formed by printing, and silver was further vacuum-deposited thereon at 250 nm to produce an organic EL device. When the light emission characteristics of the organic EL element were observed, uniform light emission was observed over the entire coated region.

  Note that the parts not specifically mentioned are the same as those in the first embodiment.

  An example in which one seamless letterpress is slid horizontally and applied again is shown below.

[Formation of organic light-emitting layer by seamless relief]
As a device for manufacturing organic EL elements, a flexo proofing machine is equipped with a solvent-resistant seamless resin relief plate made in-house with a convex part of 120 μm, a concave part of 380 μm, a resin part total width of 75 mm, and a cylinder diameter of 50 mm. Printing was performed on the substrate 3 to be transferred using the luminescent coating solution 4. The cylinder was slid horizontally by 75 mm + 380 μm, and printing was performed again on the transfer target substrate 3 on which printing was performed once, followed by drying at 130 ° C. for 1 hour. After this drying, a 5 nm-thick calcium film was formed on the organic light-emitting layer formed by printing, and silver was further vacuum-deposited thereon by 250 nm to produce an organic EL device. When the light emission characteristics of the organic EL element were observed, uniform light emission was observed over the entire coated region.

  Note that the parts not specifically mentioned are the same as those in the first embodiment.

  The present invention can be used in a method for manufacturing an organic EL element in which the organic light emitting material is a polymer material, and in particular, can be used in a method for manufacturing an organic EL element in which an organic light emitting layer is formed by a relief printing method.

It is the general | schematic perspective view and schematic sectional drawing which show an example of the cylinder for printing used for this invention. It is a general | schematic perspective view which shows an example which showed the printing state using the printing cylinder of this invention with the cylinder for single printing. It is a schematic sectional drawing which shows an example of a printing process among the manufacturing processes of the organic EL element of this invention. (A) is the top view which looked at the organic EL element after completion by the manufacturing method of this invention from the top, (b) is sectional drawing of this organic EL element, (c) is one light emission unit of the organic EL element of this invention FIG. . It is a conceptual top view which shows the process until printing of an organic luminescent material among the manufacturing processes of an organic EL element. It is a conceptual top view which shows the process from printing of an organic light emitting material to mask removal among the manufacturing processes of an organic EL element. It is a schematic plan view which shows a mode that it prints by dividing | segmenting into a some cylinder horizontally. It is an outline top view showing signs that printing is carried out sequentially with one cylinder divided into a plurality of fields in the horizontal direction.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cylinder 2 Convex part 3 Transfer substrate 4 Luminous coating liquid 11 Ink replenishment apparatus 12 Anilox roll 13 Ink 14 Doctor apparatus 15 Cylinder 16 Transfer object 21 Organic light emitting layer 22 Translucent substrate 23 Transparent conductive layer 26 Transfer object 31 Translucent substrate 32 Transparent conductive layer 33 Hole transport layer 34 Organic light emitting layer 35 Cathode layer 41 Transfer substrate 42 Mask 43 Electrode forming portion 44 Hole injection layer 45 Organic light emitting layer 50 Transfer substrate 51 Cylinder 52 Print pattern 53 Cylinder 54 Print pattern 55 Printed circuit board

Claims (9)

The organic light emitting layer manufacturing process in the method for manufacturing an organic EL element uses a printing cylinder having a relief plate for manufacturing an organic EL element in which at least a plurality of solvent-resistant convex portions are continuously formed on the surface circumference. A method for producing an organic EL element for printing an organic light emitting material on a substrate ,
An ink containing an organic light emitting material is supplied from an ink replenishing device to the anilox roll, the ink is supplied from the anilox roll onto the relief printing plate for producing the organic EL element, and the ink from the relief printing plate for producing the organic EL element to the transfer substrate. A step of supplying
The method of manufacturing an organic EL element, wherein the ink replenishing device is a die coater or a slit coater. The organic light emitting layer manufacturing process in the method for manufacturing an organic EL element uses a printing cylinder having a relief plate for manufacturing an organic EL element in which at least a plurality of solvent-resistant convex portions are continuously formed on the surface circumference. A method for producing an organic EL element for printing an organic light emitting material on a substrate,
An ink containing an organic light-emitting material is supplied from an ink replenishing device to an anilox roll, excess ink on the anilox roll is removed by a doctor device, and the ink is supplied from the anilox roll onto the relief plate for producing the organic EL element. , Having the step of supplying the ink from the relief printing plate for organic EL element production to the substrate to be transferred,
The said doctor apparatus is a doctor roll, The manufacturing method of the organic EL element characterized by the above-mentioned. 3. The method of manufacturing an organic EL element according to claim 1, wherein printing is performed through a mask having a predetermined pattern. 4. The method for producing an organic EL element according to claim 1, wherein the solvent-resistant convex portion is a solvent-resistant polymer. 5. The method of manufacturing an organic EL element according to claim 1, wherein printing is performed by dividing a plurality of cylinders in a horizontal direction. 5. 5. The method of manufacturing an organic EL element according to claim 1, wherein the organic EL element is divided in a horizontal direction and sequentially printed. Organic EL that performs printing of ink containing organic light emitting material on a substrate to be transferred using a printing cylinder provided with a relief plate for producing an organic EL element in which at least a plurality of solvent-resistant convex portions are continuously formed on the surface circumference An element manufacturing apparatus,
An ink replenishing device, an anilox roll for inking the relief printing plate for producing the organic EL element, and a printing cylinder equipped with the relief printing plate for producing the organic EL element,
The organic EL element manufacturing apparatus, wherein the ink replenishing device is either a slit coater or a die coater. Organic EL that performs printing of ink containing organic light emitting material on a substrate to be transferred using a printing cylinder provided with a relief plate for producing an organic EL element in which at least a plurality of solvent-resistant convex portions are continuously formed on the surface circumference An element manufacturing apparatus,
An ink replenishing device, an anilox roll for inking the relief printing plate for producing the organic EL element, a doctor device for removing excess ink on the anilox roll, and a printing cylinder provided with the relief printing plate for producing the organic EL device, With
The said doctor apparatus is a doctor roll, The organic EL element manufacturing apparatus characterized by the above-mentioned. 9. The organic EL element manufacturing apparatus according to claim 7 or 8, wherein a plurality of printing cylinders provided with the relief plate for manufacturing the organic EL element are provided in the lateral direction.

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