TWI448821B - Method for producing organic electroluminescent element - Google Patents

Description

Method for producing organic electroluminescent element

The present invention relates to a resin relief for relief printing 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 device obtained by using the resin relief.

In recent years, as a display element of products such as mobile phones, organic EL devices having characteristics such as thinness, low power consumption, and light weight have attracted attention. In the organic EL device, an organic light-emitting layer containing an organic EL light-emitting material is provided between two mutually opposing electrodes, and a current is caused to flow through the organic light-emitting layer to cause the organic light-emitting layer to emit light.

The above organic EL luminescent material has a low molecular material and a high molecular material. Usually, a low molecular material is used, and an organic light emitting layer is formed on a substrate by vacuum evaporation or the like. Since the pattern of the mask is fine, when the substrate is enlarged and the vacuum vapor deposition apparatus is also increased in size, a material is generated. The use efficiency, processing power and yield are greatly reduced. Therefore, in order to meet the demand for mass production even when the substrate is enlarged, we have recently tried to use a polymer material as an organic EL luminescent material in a technical manner, and dissolved and dispersed it in a solvent as a printing ink. An organic light-emitting layer is formed on the substrate by a printing method (see, for example, Patent Document 1). However, conventionally, a compound of a conjugated polymer series which is a polymer material has a low solubility. Therefore, in order to form a printing ink, it is necessary to use an aromatic series compound such as xylene or toluene as a solvent. The aromatic series of solvents have a high degree of swelling property to the high molecular polymer, so when the organic light emitting layer is formed by, for example, lithographic printing, it may be swollen by a solvent or may be made into a size due to repeated printing treatment. The precision deteriorates.

In addition, the printing method has various methods in addition to the above lithography method. Since the above-mentioned organic EL element uses a glass substrate as a substrate, it is preferable to use a lithographic method or a relief printing method because the lithographic method uses an elastic rubber. Cloth, and the letterpress printing method uses a rubbery or resin plate having elasticity. However, the size precision of the blanket of the above lithography method is deteriorated, so the letterpress printing method is often used. Further, in the letterpress printing method, the rubber plate may have the above-mentioned doubts, so a resin plate is often used, and a solid plate (for example, a product manufactured by TORAY Co., Ltd.) which is commercially available is often used.

(Patent Document 1) Japanese Patent Laid-Open Publication No. 2006-252787

However, the solid plate is a resin relief obtained by evaporating and drying a water-soluble polymer such as water-soluble nylon or polyvinyl alcohol and a soluble emulsion composition of a photosensitive resin, so that the hardness is very hard, and the substrate is caused by printing. The damage will be very serious.

In view of the above problems, an object of the present invention is to provide a resin relief for relief printing and a method for producing an organic EL device using the resin relief, which are dimensionally precise even when the printing process is repeated, and the substrate is printed at the time of printing. The damage caused is small.

In order to achieve the above object, the present invention provides a resin relief for letterpress printing, which is a blend of a prepolymer and a monofunctional or polyfunctional monomer in which an acrylate is added to an addition polymerization product of a polyester polyol and a diisocyanate. A photosensitive resin composition was prepared, and the photosensitive resin composition was used as a material of the resin relief. The present invention further provides a method for producing an organic EL device, wherein the printing ink obtained by dissolving an organic EL luminescent material in a solvent is printed on a substrate by using the resin relief for relief printing, and then evaporating and vaporizing the solvent. An organic light emitting layer is formed.

In other words, the inventors of the present invention have obtained a relief printing resin relief (hereinafter referred to as "resin relief") which is stable even when the printing process is repeated and has a small dimensional damage, and which causes little damage to the substrate during printing. Intensively, it was found that a prepolymer and a monofunctional or polyfunctional monomer obtained by adding an acrylate to an addition polymerization product of a polyester polyol and a diisocyanate were prepared to obtain a photosensitive resin composition. Further, when the photosensitive resin composition is used as the material of the resin relief, the initial purpose can be achieved, and the present invention can be completed. Since the resin relief of the present invention has a photosensitive resin composition of a polyester series backbone, the aromatic series solvent is less likely to swell than the aliphatic series backbone, thereby repeating printing. The dimensional precision of the resin relief plate is not lowered, and the dimensional precision of long-term stability can be maintained. Moreover, the resin relief has a very soft hardness and causes little damage to the substrate during printing.

Further, in the method for producing an organic EL device of the present invention, the organic light-emitting layer is formed on the substrate by using the resin relief. Therefore, even if a plurality of organic EL elements are produced by one resin relief, the organic light-emitting layer of the organic EL element produced is obtained. The dimensional precision is also very stable. Further, damage to the substrate during the production of the organic EL element is small, and there is no problem such as damage of the substrate.

Next, a preferred embodiment of the present invention will be described. However, the invention is not limited to the embodiment.

Fig. 1 is an embodiment of a resin relief of the present invention. In the above embodiment, the resin relief is used to print an organic light-emitting layer 23 (see FIG. 7) on an organic EL element constituting a product (not shown) such as an organic EL color display to be described later. 2 and 3, the resin relief is composed of a substrate 1 and a plurality of printing projections 2, and each printing projection 2 is formed in a strip shape and interposed. A predetermined interval (pitch) is projected in parallel on the pattern printed surface of the substrate 1. Then, a plurality of minute projections (micro projections) 3 are distributed on the bottom surface of each of the printing projections 2, and a continuous groove portion 4 is formed between the microprotrusions 3, and printing ink (not shown) is held. In the groove portion 4.

The above-mentioned resin relief has a flexibility in which the rubber hardness of Japanese Industrial Standards (JIS) is in the range of A60 to 90° of the hardness of the ear, and it is preferable to have flexibility in a range of a hardness of A65 to 80°. If the hardness of JIS rubber is larger than the hardness of A29°, the hardness will be too hard, which may cause damage to the substrate. If it is smaller than 60°, the hardness will be too soft. The printing ink may ooze out during printing, and the liquid will be produced. Leaking the problem, and thus unable to get a sharp image.

Further, the resin relief can be developed with a water-based detergent, and the unhardened portion can be washed with a water-based detergent such as washing water in the production process of the resin relief described later.

Further, the above-mentioned resin relief is an aromatic series solvent in which an organic EL luminescent material is dissolved and dispersed, for example, anisole, cyclohexylbenzene, tetrahydronaphthalene or a mixed solvent of these, and has a room temperature of 20 to 25 ° C. Under continuous immersion for 24 hours, the rate of change of weight before and after immersion is in the range of 0.2 to 15%. That is, the above-mentioned resin relief has less swelling of the aromatic series solvent. Therefore, when the printing ink obtained by dissolving and dispersing the organic EL luminescent material in an aromatic solvent is used, since the resin relief is less likely to swell, the dimensional precision of the resin relief is not lowered even if the printing process is repeated. It is able to maintain stable dimensional precision for a long period of time.

The above weight change rate is preferably set in the range of 1 to 10%. If the above weight change rate exceeds 10%, repeated printing treatment may lower the dimensional precision of the resin relief. Further, the weight change rate is preferably as low as possible, and if it is about 1%, the dimensional precision is hardly lowered. However, in consideration of the usual number of uses, the above size is in the range of 5 to 7%. There is no doubt that the precision will be reduced. Further, when a solvent of an aromatic series is used, when a mixed solvent of anisole, cyclohexylbenzene or tetralin is used, the blending ratio thereof can be arbitrarily set. Further, when the weight change rate is measured, the resin relief having a thickness of 0.13 to 0.30 cm is first cut at a size of 2 cm × 3 cm, and then measured.

Further, the resin relief preferably has a resin property of an elongation at break of 15 to 200%, a tensile strength of 2 to 100 MPa, and a maximum tensile strength of 30 to 200 N. If it exceeds this range, the rubber hardness will increase, and there is a problem that the substrate is damaged as described above. If it is less than this range, the rubber hardness is reduced, and as described above, there is a tendency that liquid leakage occurs during printing.

For example, in the case of linear printing, the shape of the microprotrusions 3 is preferably a truncated cone shape or a columnar shape (a conical platform shape is shown in FIGS. 2 and 3), and the height H of the microprotrusions 3 is made to improve the transfer characteristics. _{1 is} preferably in the range of 1 to 500 μm, and the diameter D _{1 of the} top surface is preferably in the range of 5 to 500 μm, and the interval W ₁ between the adjacent minute protrusions 3 is preferably in the range of 5 to 500 μm.

5 is a cross-sectional view taken along line BB of FIG. 4, and as shown in FIGS. 4 and 5, a strip-shaped uneven portion is formed on the top surface of the printing convex portion 2 instead of the minute projection 3, which is The uneven portion is composed of a plurality of strip-shaped ridges 5 arranged in parallel at a predetermined interval, and strip-shaped grooves (strip-shaped recesses) 6 formed between the adjacent strip-shaped ridges 5. The cross-sectional shape of the strip-shaped ridges 5 is preferably a plate shape or a rectangular shape (the base shape is shown in FIGS. 4 and 5). In order to make the transfer characteristics better, the height H _{2 of the} strip-shaped ridges 5 is preferably 1 to In the range of 500 μm, the width D _{2 of the} top surface is preferably in the range of 5 to 500 μm, and the groove width (concave width) W _{2 of the} strip-shaped groove 6 is preferably in the range of 5 to 500 μm. Further, when the organic light-emitting layer 23 of the organic EL element is not used for display applications, and is used for applications such as illumination, the above-described linear pattern is not formed, and a full-color single-patterned printing plate can be used instead. .

With regard to such a resin relief, a prepolymer and a monofunctional or polyfunctional monomer obtained by adding an acrylate to an addition polymerization product of a polyester polyol and a diisocyanate are blended to obtain a photosensitive resin composition. The photosensitive resin composition was used as a material of the resin relief.

The polyester polyol is, for example, a polyester copolymer obtained by polycondensing a dicarboxylic acid composed of a saturated fatty acid, an unsaturated fatty acid, an aromatic acid or the like with a polyol.

Here, the polyhydric alcohol refers to an alcohol having two or more hydroxyl groups in one molecule, and specific examples thereof include ethylene glycol, propylene glycol, and diethylene glycol, and they may be used singly or in combination.

Further, as the diisocyanate, for example, an aliphatic, alicyclic or aromatic diisocyanate can be used, and examples thereof include 2,4-toluene diisocyanate, 2,6-toluene diisocyanate, and 4,4'-diphenyl group. Methane diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, diaminoanisole isocyanate, 3,3'-xylene-4,4'-diisocyanate, p-xylene diisocyanate, 1, 3-cyclohexanedimethylisocyanate, 1,5-naphthalene diisocyanate, trans-vinyl diisocyanate, 2,6-diisocyanate methylhexanoate, diphenyl ether-4,4'-diisocyanate, Hexamethylene diisocyanate, isophorone diisocyanate, and the like. A conventionally known method can be used for the method of addition polymerization of such a polyester and a diisocyanate.

Examples of the acrylate include 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, and polyethylene glycol mono(meth)acrylate.

The addition of the acrylate to the prepolymer described above can be carried out, for example, by a conventionally known graft polymerization method or the like. Here, the ratio of the prepolymer addition acrylate is usually set in the range of 0.5 to 5.0 mols of the prepolymer 1 molar addition acrylate. When the addition ratio of the acrylate exceeds the above range, the rubber hardness of the resin relief plate increases, and if it is less than the above range, the problem that the resin relief cannot be formed may occur.

With respect to the above monofunctional or polyfunctional single polymer, for example, the following various monomers are represented: 1,3 or 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, diethyl Diol diacrylate, neopentyl glycol diacrylate, polyethylene glycol diacrylate, trimethylolpropane triacrylate, pentaerythritol triacrylate, dipentaerythritol hexaacrylate, 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxy-3-phenoxypropyl acrylate.

The blending ratio of the prepolymer prepared by adding the acrylate and the monofunctional or polyfunctional monomer can be arbitrarily blended with respect to the above-mentioned addition polymerization product, in order to achieve the intended hardness, flexibility and swelling ratio. . Further, the photopolymerization initiator blended in these prepolymers and monomer blends is in the range of 0.001 to 10% by weight based on the blend.

The photosensitive resin composition may be in the form of a liquid, a solid or a viscous body. When it is a solid or a powder, it needs to be liquid before use.

We can use these relief materials and manufacture the above-mentioned resin relief in the following manner. That is, first, the negative film 11 is prepared as shown in FIG. In the negative film 11, in the region corresponding to the resin relief, a circular hole 11a is provided in a portion corresponding to the microprotrusion 3 of the relief, the inner side of the circular hole 11a is transparent, and the other portions are black. Next, the negative film 11 is stacked on the surface of the lower glass substrate 12, and then a liquid photosensitive resin composition having a polyester series backbone is applied onto the surface of the negative film 11 to have a predetermined thickness. In Fig. 6, the coating layer is denoted by reference numeral 13. In the coating layer 13, a predetermined non-hardened portion to be described later is indicated by a symbol 13a, and a predetermined hardened portion is indicated by a hatched portion S. Next, a transparent backsheet (not shown) is stacked on the surface of the above-mentioned coating layer 13, and the glass substrate 14 on the upper side is stacked on the surface of the backsheet.

Next, as shown in FIG. 6, the light source 15 is used to irradiate light such as ultraviolet rays through the upper glass substrate 14 and the negative film, and light such as ultraviolet rays is irradiated through the lower glass substrate 12 and the negative film 11. Thereby, the portion where the light incident from the entire surface of the film layer composed of the photosensitive resin composition 13 and the light incident from the circular hole 11a of the negative film 11 reach (the oblique portion S of FIG. 6) ) will harden. At this time, the light conveys the depth, which can be adjusted by the intensity of the illumination light. Next, the upper and lower glass plates 12 and 14 and the negative film 11 are removed, and are removed by the developer to remove the black portion of the negative film 11 so that light cannot be irradiated to form an uncured portion. Then, the hardened portion is dried, and then the side on which the minute projections 3 are formed is irradiated with light such as ultraviolet rays (post exposure), thereby reliably hardening a portion such as a thin line. In this way, the resin relief as shown in Fig. 1 can be manufactured.

As described above, in the above-described embodiment, since the relief material is a photosensitive resin composition having a high polarity and having a polyester-based backbone, the resin relief produced by using the relief material is almost solvent to the aromatic series. Will not swell. Therefore, even if the printing process is repeated, the dimensional precision of the resin relief is not lowered, and the dimensional precision can be maintained for a long period of time. Further, the resin relief has a relatively soft hardness, and the printed substrate is hardly damaged during printing.

Fig. 7 is an embodiment of an organic EL device produced by using the above resin relief. In the embodiment, the organic EL element is provided with 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 causes a current supplied from the power source 25 connecting the two electrodes 22 and 24 to flow through the organic light-emitting layer 23 provided between the two electrodes 22 and 24 to emit light. Then, the EL light is displayed through the glass substrate 21. Further, the organic light-emitting layer 23 has three colors of red (R), green (G), and blue (B), and the organic light-emitting layers 23 of the respective colors are formed in a strip shape and arranged in parallel at predetermined intervals, and are arranged in red, green, and The blue order is repeated. Then, one sheet of resin relief is used in the printing of the monochromatic organic light-emitting layer 23, and the resin relief can be used in accordance with the number of the organic light-emitting layers 23.

The above organic EL element was produced in the following manner. That is, first, the anode 22 is formed on the surface of the glass substrate 21. In this step, a transparent conductive material such as indium tin oxide (ITO) or zinc aluminum oxide is coated on the surface of the glass substrate 21 by a vacuum vapor deposition method or a sputtering method to form a transparent anode 22, or a gold plating layer. Or a thin film of platinum to form a translucent anode 22.

Next, using the above-mentioned resin relief, the positive hole transport layer and the organic light-emitting layer 23 are sequentially formed on the anode 22 by a usual relief printing method. In the step of forming the organic light-emitting layer 23, first, the organic EL light-emitting material is dissolved and dispersed in a solvent of an aromatic series to obtain three kinds of printing inks of red, green, and blue. Further, as shown in FIG. 8, a printing machine is provided which includes a printing roller 31, a pattern roller 32, a printing table 33, a printing ink supply device 34, and drains the remaining printing ink on the pattern roller 32. Scraper 35. Next, the resin relief is mounted on the printing roller 31, and the glass substrate 21 on which the anode 22 (not shown) is formed is placed on the printing table 33. Next, the printing ink supply device 34 supplies a printing ink of a certain color (for example, red) to the pattern roller 32, and then rotates the printing roller 31 and the pattern roller 32. At this time, the printing ink is held in the groove portion 4 on the top surface of the printing convex portion 2 of the resin relief. Then, the printing table 33 is moved in synchronization with the rotation of the printing roller 31, and printing ink of a certain color is printed on the anode 22 on the surface of the glass substrate 21, and then heated to allow the aromatic series in the printing ink. The solvent is evaporated to vaporize to form the organic light-emitting layer 23. The other two colors are also printed in such a manner as to form the organic light-emitting layer 23 of three colors at a predetermined position.

Next, a cathode 24 is formed on the above organic light-emitting layer 23. The cathode 24 is made of a metal element monomer such as Li, Na, Mg, La, Ce, or Ca. The cathode 24 is formed by vapor-depositing the respective metal element monomers on the organic light-emitting layer 23 while monitoring the thickness from the respective vapor deposition sources by a resistance heating method under a predetermined degree of vacuum. . Thereafter, the above-mentioned two poles 22, 24 are connected to a power source 25 to manufacture the above organic EL element.

According to these manufacturing methods, even if a large number of organic EL elements are produced using only one resin relief, the dimensional accuracy of the organic light-emitting layer 23 of the obtained organic EL element is stable. Further, damage to the substrate at the time of manufacture of the organic EL element is small, and damage to the glass substrate 21 is not caused.

The organic electroluminescent body may have a low molecular weight or a high molecular weight in the range of 2 to 100 mPa ‧ s. Low molecular materials such as: triphenylbutadiene, coumarin, Nile red, Diazole derivatives and the like. Further, the polymer material is, for example, poly(2-decyloxy-1,4-phenylene) (DO-PPP), poly[2-(2'-ethylhexyloxy)-5-methoxy- 1,4-phenylene extended vinyl](MEH-PPV), poly[5-methoxy-(propoxyarylene)-1,4-phenylene vinyl] (poly[5-methoxy-( 2-propanoxysulfonide)-1,4-phenylenevinylene])(MPS-PPV), poly[2,5-bis(hexyloxy-1,4-phenylene)-(1-cyanovinylidene)](CN -PPV), poly[2-(2'-ethylhexyloxy)-5-methoxy-1,4-phenylene-(1-cyanovinylidene)](MEH-CN-PPV), Poly (dioctyl) and the like. Further, such solvents which can be used are, for example, cyclohexylbenzene, trichlorobenzene, anisole, xylene, ethyl benzoate, cyclohexylpyrrolidone, butyl quercetin, dichlorobenzene, toluene, etc., etc. It can be used alone or in combination of two or more. The mixing ratio at the time of mixing is determined by the organic light-emitting layer 23.

[Examples]

Next, an embodiment will be described.

A resin relief as shown in Figs. 1 to 3 was prepared. The resin relief had a JIS rubber hardness of a hardness of A85°, and was immersed in anisole at room temperature for 23 hours at room temperature for 24 hours, and the weight change rate was 5%. These resin reliefs were produced using the relief material of the following Table 1, and were produced by the above-described method of manufacturing a resin relief, the total thickness of the relief was 1.3 mm, and the thickness of the substrate was 0.7 mm.

(Note 1) The rubber hardness was measured in accordance with JIS K6253 "Test Method for Hardness of Rubber" and measured in dumbbell shape No. 3.

(Note 2) The tensile strength and the elongation at break were measured in accordance with JIS K6251 "Test method for tensile test of rubber".

(Note 3) The rate of change in weight was obtained by continuously immersing the test piece of 1.3 mm × 20 mm × 30 mm in a room temperature environment of 23 to 25 ° C for 24 hours, and then measuring the difference in weight before and after.

A printing machine (Flexograph, MT33S) shown in Fig. 8 was prepared, and the printing conditions were as follows: the nip width between the resin relief and the pattern roller was adjusted to 3.5 to 6.5 mm, and the resin relief and the glass substrate were used. The nip width between them was adjusted to 7.5 to 12.5 mm, and the printing speed was adjusted to 20 m/min.

Anisole and tetralin were mixed in a ratio of 1 to 1, and 0.2 to 1.5% by weight of polyvinyl carbazole (manufactured by Kanto Chemical Co., Ltd., molecular weight: 90,000) was dissolved therein as a simulated printing ink. The simulated printing ink was conveyed with dry air of 0.01 to 0.1 MPa, and an amount of 0.5 to 5 ml was supplied to the pattern roller in 40 seconds.

The resin relief is mounted on a plate of a printing machine, and the printing machine is driven by the printing conditions and the printing speed, and the printing ink is printed on the glass substrate for constituting the organic EL element, and then heated to 60 to 90. The heating plate of °C removes anisole and tetralin, and then removes only the active component to form an organic light-emitting layer.

The organic light-emitting layer was measured by an optical interference microscope, and the result was measured to 400 to 700. Film thickness. Further, the ultraviolet light source was placed close to the surface of the film, and it was confirmed that the ink for the analog printing was illuminated, indicating that the organic EL luminescent material had been coated.

1‧‧‧Substrate

2‧‧‧Printing convex

3‧‧‧Microprotrusions

4‧‧‧Ditch

5‧‧‧ strips

6‧‧‧ strip groove

11‧‧‧negative

11a‧‧‧ round hole

12‧‧‧ glass substrate

13‧‧‧ Coating layer

13a‧‧‧Unscheduled parts

14, 21‧‧‧ glass substrate

15‧‧‧Light source

22‧‧‧Anode

23‧‧‧Organic light-emitting layer

24‧‧‧ cathode

25‧‧‧Power supply

31‧‧‧Printing roller

32‧‧‧patterned roller

33‧‧‧Printing table

34‧‧‧Printing ink supply device

35‧‧‧ scraper

A-A, B-B‧‧‧ hatching

D1‧‧‧ diameter

D2‧‧‧Width

H1, H2‧‧‧ height

S‧‧‧Predetermined hardened part

W1‧‧‧ interval

W2‧‧‧Ditch width

Fig. 1 is a side view showing an embodiment of a resin relief of the present invention.

Fig. 2 is an enlarged plan view showing a main part of the resin relief.

Figure 3 is a cross-sectional view taken along line A-A of Figure 2.

Fig. 4 is an enlarged plan view showing a main part of a modified embodiment of the above resin relief.

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

Fig. 6 is an explanatory view showing a method of manufacturing the resin relief.

Fig. 7 is an explanatory view showing an embodiment of an organic EL device.

Fig. 8 is an explanatory view showing a method of producing the above organic EL element.

1‧‧‧Substrate

2‧‧‧Printing convex

3‧‧‧Microprotrusions

4‧‧‧Ditch

Claims (5)

A method for producing an organic EL device, comprising: a step of preparing a resin relief for relief printing, wherein a prepolymer obtained by adding an acrylate to an addition polymerization product of a polyester polyol and a diisocyanate is blended And a monofunctional or polyfunctional acrylate-based monomer to obtain a photosensitive resin composition, and the photosensitive resin composition is used as a material of the resin relief; a step of forming an organic light-emitting layer, wherein the organic EL light is emitted The printing ink prepared by dissolving the substance in an aromatic solvent is held by the printing convex portion of the relief printing resin relief, and is printed on the substrate on which the anode is formed, and then the aromatic solvent is evaporated. Vaporization to form an organic light-emitting layer. The method for producing an organic EL device according to the first aspect of the invention, wherein the hardness of the relief printing resin relief is set to a range in which the JIS rubber hardness is a hardness of A60 to 90°, and a material of the resin relief is available. The aqueous detergent is developed. The method of producing an organic EL device according to the first or second aspect of the invention, wherein the resin relief of the relief printing is an anisole or a cyclohexyl group which is an aromatic solvent which dissolves and disperses the organic EL luminescent material. Benzene or tetralin or a mixed solvent of these materials has a swelling ratio of continuously immersing for 24 hours at room temperature of 20 to 25 ° C and a weight change ratio before and after immersion in the range of 0.2 to 15%. The method for producing an organic EL device according to the first or second aspect of the invention, wherein the resin relief for relief printing has an elongation at break of 15 to 200% and a tensile strength of 2 to 100 MPa, and maximum tensile strength. The resin is 30~200N. The method for producing an organic EL device according to the first or second aspect of the invention, wherein the resin relief for relief printing includes a printing convex portion on a pattern printing surface, and a surface of the printing convex portion is formed to hold printing A striped concave portion having a concave portion width of ink of 10 to 500 μm or a small convex portion having a convex portion having a diameter of 10 to 500 μm.