JP5050518B2 - Manufacturing method of resin relief plate, developing device, manufacturing method of printed matter, and manufacturing method of organic EL element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a resin letterpress plate for forming a fine electronic circuit pattern by a printing method through steps of exposing a photosensitive resin applied on a plate material along a pattern and developing the resin, the plate preventing chipping in the pattern of the resin letterpress plate or print defects but capable of forming a uniform printed material, and to provide a developing device for the method and a printed material using the method. <P>SOLUTION: The developing step is carried out by injecting a developer solution from a spray injection device to a plate material after exposure. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a method for producing a resin relief plate, a developing device therefor, and a printed matter using the same, and in particular, a resin relief plate for forming a fine electronic circuit pattern by a printing method, and exposing a photosensitive resin in a pattern to the plate material. -It relates to a manufacturing method formed by development.

  In recent years, the development of electronic devices using high-definition processing technology has made rapid progress. Such electronic devices are expected to contribute to the development of next-generation electronics, biotechnology, optronics and other fields.

  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 patterning.

  Furthermore, among various printing methods, organic EL elements and displays often use a glass substrate as a substrate, and therefore methods such as gravure printing that use hard plates such as metal printing plates are unsuitable and elastic. An offset printing method using a rubber plate having a stencil and a relief printing method using a photosensitive resin plate mainly composed of rubber or other resin are appropriate. Actually, as a trial of 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.

Further, in the relief printing method, until now, there are many cases where the principal component is a relief plate formed of a hydrophobic rubber, and a development method using an organic solvent has been the mainstream. In recent years, as international regulations on VOC (volatile organic compounds) become stronger, development methods using a developer containing water as a main component are becoming mainstream (Patent Document 3).
JP 2001-93668 A JP 2001-155858 A JP 2004-70231 A

As a development method of letterpress using a photosensitive resin that has been used for general printing applications, spray type development methods have been used in the past, but development irregularities unique to spray type development methods are present on the letterpress. It was seen. In order to solve this problem, a brush-type development method has been devised, and it has become possible to perform development uniformly and in a short time.

  On the other hand, when an electronic device such as an organic EL display is to be manufactured by a relief printing method, for example, in the case of 2 inches diagonal, 320 pixels × 240 pixels (QVGA), which has recently become mainstream as a main display for mobile phones. One pixel size is required to be 120 μm, and the display width per color is required to be as fine as 20 to 40 μm.

  In the conventional brush-type developing method used for the development of relief printing for relief printing, the diameter per brush is often about 30 to 100 μm. When trying to develop a relief plate for forming a printed matter requiring a fine pattern such as an organic EL display using such a brush, depending on how the brush hits, a part of the relief plate pattern is missing, As a result, a printing defect was caused, and a uniform printed matter could not be formed.

  SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and the invention of claim 1 is to expose and develop a photosensitive resin having a resin relief plate for forming a fine electronic circuit pattern by a printing method and a photosensitive resin provided on the plate material in a pattern. The developing method is a method for producing a resin relief printing plate, wherein the development step is to develop the exposed plate material by spraying a developer from a spray-type spray device.

The invention of claim 2 of the present invention is a manufacturing method for forming a resin relief plate for forming a fine electronic circuit pattern by a printing method by exposing and developing a photosensitive resin provided in a plate material in a pattern shape. The development process is
First, immersing the exposed plate material in a developer,
Secondly, a step of removing unnecessary portions after exposure with a developer sprayed from a spray-type jet outlet,
Third, the developed developer is washed with a washing liquid sprayed from a spray-type jet nozzle,
Fourth, the step of removing the cleaning liquid by the gas injected from the injection port,
This is a method for producing a resin relief printing plate characterized by comprising:

  The invention according to claim 3 of the present invention is the method for producing a resin relief printing plate according to claim 1 or 2, wherein the convex portion of the resin relief printing plate contains at least a water-soluble polymer.

  The invention of claim 4 of the present invention is characterized in that water having a pH of 5.8 or more and 8.6 or less is circulated in a circulation tank as the developer, and the developer is circulated for use. The method for producing a resin relief printing plate according to item 1.

  The invention of claim 5 of the present invention is characterized in that water having a pH of 5.8 or more and 8.6 or less is used as a cleaning liquid, and cleaning is performed while always replacing the cleaning liquid using a non-circulating tank. The method for producing a resin relief printing plate according to any one of the above items.

  The invention of claim 6 of the present invention is a developing device for developing a resin relief plate for forming a fine electronic circuit pattern by a printing method by developing a plate material in which a photosensitive resin is exposed in a pattern, This is a resin relief plate developing device comprising a spray type spraying device for spraying and developing a developer onto an exposed plate material.

The invention of claim 7 of the present invention is a developing device for developing a resin relief plate for forming a fine electronic circuit pattern by a printing method by developing a plate material in which a photosensitive resin is exposed in a pattern,
First, an immersion means for immersing the exposed plate material in a developer,
Second, developing means for removing unnecessary portions after exposure with a developer sprayed from a spray-type jet outlet,
Thirdly, a cleaning means in which the developer after development is cleaned with a cleaning liquid sprayed from a spray-type jet nozzle,
Fourth, cleaning liquid removing means for removing the cleaning liquid by the gas injected from the injection port,
It is a resin relief printing apparatus characterized by having the following.

  According to an eighth aspect of the present invention, there is provided the developing apparatus for a resin letterpress according to the sixth or seventh aspect, wherein the convex part of the resin letterpress contains at least a water-soluble polymer.

  The invention according to claim 9 of the present invention is characterized in that water having a pH of 5.8 or more and 8.6 or less is circulated in a circulation tank as the developer, and the developer is circulated for use. The apparatus for developing a resin relief printing plate according to item 1 is used.

  The invention according to claim 10 of the present invention is characterized in that water having a pH of 5.8 or more and 8.6 or less is used as a cleaning liquid, and cleaning is performed while always replacing the cleaning liquid using a non-circulating tank. The developing apparatus for a resin relief printing plate according to any one of the above items.

  According to an eleventh aspect of the present invention, there is provided a resin relief plate produced by the method for producing a resin relief plate according to any one of the first to fifth aspects or the developing device for a resin relief plate according to any one of the sixth to tenth aspects. This is a printed matter characterized by being printed using.

  The invention according to claim 12 of the present invention is the printed matter according to claim 11, wherein the circuit pattern is at least a part of the organic EL display.

  The present invention is suitable for the production of an organic EL device, but in addition, a liquid crystal display (LCD), a plasma display (PDP), a rear projection display (RPJ), a surface electric field display (SED), a field emission display (FED). ) And the like can also be applied to the formation of a fine pattern required.

  When the relief printing method is applied to the printing of a circuit pattern that requires fine patterning such as an organic EL element, the present invention uses a spray equipped with an injection nozzle as a method for developing a plate material made of the photosensitive resin. It has been found that a relief plate suitable for printing can be formed without breaking the convex shape of the relief plate by using a developing device of the type.

  In particular, firstly, a step of immersing the exposed plate material in a developer, secondly, a step of removing unnecessary portions after exposure with a developer sprayed from a spray-type nozzle, and thirdly, after development By using a developing method characterized by having a step of cleaning with a cleaning liquid ejected from a spray-type jet nozzle and a step of removing the cleaning liquid with a gas jetted from a jet nozzle. Thus, the development unevenness seen in the conventional spray type development method can be eliminated, and the plate making of the resin relief plate can be performed without causing the plate defect seen in the brush type development method.

  Further, in the present invention, at least a water-soluble polymer is contained in the convex portion of the resin relief printing plate made of a photosensitive resin as a main raw material, thereby enabling development with water without using an organic solvent.

Further, in the present invention, development is performed while using water having a pH of 5.8 or more and 8.6 or less as a developer in a circulation tank, thereby reducing the amount of water used as the developer. This makes it possible to collect unnecessary photosensitive resin contained in the.

  Further, in the present invention, unnecessary photosensitive resin components dissolved in the developer are obtained by using water having a pH of 5.8 or more and 8.6 or less as a cleaning liquid in the present invention, and using a non-circulating tank and constantly cleaning while replacing the cleaning liquid. It became possible to prevent the most adhesion of the to the letterpress.

  Moreover, the relief pattern for fine pattern formation was able to be formed by this invention.

  Further, by using the relief pattern for fine pattern formation of the present invention, it is possible to form various energizable circuit patterns.

  In addition, a part of the organic EL display can be formed by the present invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to this.

  FIG. 1 is an explanatory view showing, in section, an example of a printing relief plate according to the present invention. A convex pattern 201 is formed on the substrate 200 in both FIG. In FIG.1 (b), the convex part pattern is formed on the base material independently with respect to the adjacent convex part pattern. In the present invention, any of the printing relief plates shown in FIGS. 1A and 1B may be used. However, as shown in FIG. It is preferable to use a letterpress. In a printing relief plate, a resin is suitably used for the convex pattern, but by forming the pattern independently, deformation of the resin used for the convex pattern due to the solvent or heat of the ink can be suppressed. In particular, when a metal material instead of a resin material is used as the base material, the deformation of the plate can be suppressed during printing, which can be suitably used.

  In the printing plate used for the printing relief plate according to the present invention, the substrate on which the projection pattern is formed is only required to have mechanical strength against printing, such as polyethylene, polystyrene, polybutadiene, polyvinyl chloride, and polyvinylidene chloride. , Known synthetic resins such as polyvinyl acetate, polyamide, polyethersulfone, polyethylene terephthalate, polyethylene naphthalate, polyethersulfone, and polyvinyl alcohol, known metals such as iron, copper, and aluminum, or laminates thereof. it can.

  In addition, as a base material which comprises the relief printing plate used for this invention, it is requested | required that it should have sufficient rigidity to suppress the dimensional change of a resin part, and that a base material itself cannot change a dimension easily. Moreover, the thing with high tolerance with respect to the solvent contained in ink is desirable. Therefore, a metal is preferably used as the material used as the substrate. Moreover, among the base materials made of a metal material, a steel base material or an aluminum base material can be suitably used in terms of workability and economy.

  In addition, it is desirable to use a photosensitive resin as the resin layer used in the plate material because a high-definition convex pattern can be easily processed. For example, a monomer containing a polymer and an unsaturated bond and a photopolymerization initiator are formed. A photosensitive resin as an element can be mentioned. At this time, as a polymer, it can select suitably from the resin materials shown later. Further, as the polymer, a water-soluble polymer can be suitably used in the point that resistance to an organic solvent is high as in the case described later. When a water-soluble polymer is used, as a developer in a development step described later. It becomes possible to use water. Further, as the monomer containing an unsaturated bond, for example, methacrylates having a vinyl bond can be used, and as the photopolymerization initiator, for example, an aromatic carbonyl compound can be used.

  In the case where a convex pattern is formed by photolithography using a photosensitive resin, a case where a negative photosensitive resin is used as an example of the printing relief plate of the present invention is shown. FIG. 2 shows an explanatory cross-sectional view of a method for producing a printing relief plate. First, as shown in FIG. 2A, a plate material in which a photosensitive resin 202a is formed on one surface on a base material 200 is prepared. Next, as shown in FIG. 2B, a photomask 206 having a light shielding portion 205 and a light transmitting portion and having a pattern formed by the light transmitting portion is disposed on the photosensitive resin. The photomask has a structure in which a light shielding portion 205 made of, for example, a chrome thin film is patterned on a light-transmitting glass 104, and the light shielding portion 205 and the chrome thin film are formed at a portion where the chromium thin film is formed. The part where there is no light becomes the translucent part.

  Next, as shown in FIG. 2C, exposure is performed by irradiating an active energy ray 207 typified by ultraviolet light through the photomask. At this time, the portion irradiated with the active energy ray through the light transmitting portion of the photomask is cured.

  Next, the photomask is removed from the resin relief plate, and the development method of the present invention described later is carried out. The uncured portion that has not been irradiated with light by exposure is removed by development, and the resin relief printing plate of the present invention as shown in FIG. At this time, when using a water-developing type resin relief plate in which the uncured portion can be dissolved and removed with water, water is used as the developer. Further, after the development, baking or post-exposure may be performed for the purpose of further curing the resin layer.

  Note that the photosensitive resin is a negative type in which the light irradiated portion is cured and the non-irradiated portion is dissolved in the developer, but the light irradiated portion is dissolved in the developer and the non-irradiated portion is maintained in a cured state. However, in order to obtain a good convex shape, it is desirable to use a negative photosensitive resin.

  In addition to rubbers such as nitrile rubber, silicone rubber, isoprene rubber, styrene butadiene rubber, butadiene rubber, chloroprene rubber, butyl rubber, acrylonitrile rubber, ethylene propylene rubber, urethane rubber, the polymer that is one component of this photosensitive resin layer, Synthetic resins such as polyethylene, polystyrene, polybutadiene, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyamide, polyurethane, polyether sulfone, polyethylene terephthalate, polyethylene naphthalate, polyether sulfone, polyvinyl alcohol, and copolymers thereof, One or more types can be selected from natural polymers such as cellulose, but when applying a coating liquid such as an organic light emitting material, fluorine is used from the viewpoint of solvent resistance to organic solvents. Elastomer or polytetrafluoroethylene, polyvinylidene fluoride, fluorine-based resins such as polyethylene hexafluoride vinylidene and copolymers thereof are preferred.

  In addition, by containing at least one kind soluble in water-soluble solvents such as polyamide, polyurethane, polyvinyl alcohol, cellulose acetate succinate, partially saponified polyvinyl acetate, cationic piperazine-containing polyamide and derivatives thereof Since development using water becomes possible, it is most desirable to select and use one or more of these.

  The base material 200 that supports the protrusions can be made of metal, rubber, resin, or the like, but it is desirable to use a metal base material that has a small size change with respect to changes in the printing environment such as temperature and humidity.

In addition, the means for forming the relief plate used in this example on the printing cylinder may use either a step of making a plate directly on the cylinder or a step of installing a separately made plate on the cylinder. In view of the simplicity of the method, it is most desirable to perform a series of plate making operations such as exposure, development, drying, and post-exposure in the state of a flat plate, and then place it on a cylinder.

  Next, as an example of the developing device in this example, a flat sheet type developing device using a negative photosensitive resin will be described. The present invention is not limited to this.

  The developing device of this example has the following configuration. That is, an immersion means for immersing the exposed plate material in a developing solution, a developing means for removing unnecessary portions after exposure with a developing solution sprayed from a spray-type jet nozzle, and the developing solution after development is a spray type It has a cleaning means for cleaning with the cleaning liquid ejected from the ejection port, and a cleaning liquid removing means for removing the cleaning liquid with the gas ejected from the ejection port. The development process using this will be described below.

  First, as shown in FIG. 3 (a), as a first step, a dipping unit is used to immerse the exposed plate material in an immersion layer filled with a sufficient amount of a developing solution. The entire plate does not need to be immersed at the same time, and at least a part of the exposed plate material may be immersed.

  Next, as shown in FIG. 3B, as a second step, development is performed by the developing means using at least one spraying device using a developer. As the spray spray pattern at this time, a known pattern such as a circular diffusion type, a fan-shaped diffusion type, a random spray type, or a spray type can be arbitrarily selected. Further, the distance L between the spray nozzle and the exposed plate material can be arbitrarily selected. It is desirable that the entire plate material is always immersed in the developer.

  In the second step, the pH of the developer is 5.8 or more and 8. in order to reduce the amount of water used as the developer and to recover unnecessary photosensitive resin contained in the developer. It is most desirable to perform development while using 6 or less water and circulating in a circulation tank. Since most of the wastewater after development is almost neutral pH and contains almost no harmful chemical substances, in addition to requests from industrial waste collection companies, dilution, chemical treatment, etc. should be performed. It can also be discharged according to the environmental standards of each local government.

  Next, as shown in FIG. 3C, as a third step, the battlefield means performs cleaning with at least one spraying device using a cleaning liquid. As the spray spray pattern at this time, a known pattern such as a circular diffusion type, a fan-shaped diffusion type, a random spray type, or a spray type can be arbitrarily selected. Further, the distance L between the spray nozzle and the exposed plate material can be arbitrarily selected. It is desirable that the entire plate material is always immersed in the developer.

  In the third step, water having a pH of 5.8 or more and 8.6 or less is used as a cleaning solution in order to prevent the most unnecessary photosensitive resin component dissolved in the developer from adhering to the relief printing plate. It is desirable to always perform cleaning while changing the cleaning liquid. Note that it is possible to reduce the cleaning liquid by preparing a plurality of nozzles for injecting the cleaning liquid, partly using circulating water and partly using non-circulating water.

  Next, as shown in FIG. 3D, the cleaning liquid is removed by removing the cleaning liquid with the gas ejected from the ejection port by the cleaning liquid removing means as the fourth step. The shape of the injection port at this time may be dot-like or linear, and the injection pressure can be arbitrarily selected according to the pattern to be formed. In addition, the number of injection ports needs one or two or more.

  In addition, there may be blanks that do not perform any treatment between the above-mentioned first to fourth steps, and also include steps such as simple washing and drying. good.

  The exposed plate material can be transported in the developing device by using a known material such as a roller transport or a magnet transport.

  Next, a method for producing an organic EL element will be described as an example of a method for producing a circuit pattern using a resin relief plate patterned according to the present case. The present invention is not limited to this.

  The relief printing pattern formed by the present invention can form an ink pattern without damaging the printing medium even on a hard printing body such as a glass substrate by making the convex pattern resin. it can.

  Therefore, using the relief printing plate patterned according to the present invention, it is possible to produce a printed matter that forms an ink pattern on the surface of a substrate to be printed that requires high accuracy, such as an electrode substrate for an organic EL display, by the relief printing method. The manufacturing method will be described below. FIG. 4 shows a schematic diagram of a relief printing apparatus used for producing the printed material of the present invention. A printing substrate 106 is fixed to the stage 107, the printing relief plate 104 patterned according to the present invention is fixed to the plate cylinder 105, and the printing relief plate 104 is in contact with the anilox roll 103 which is an ink supply body. The anilox roll 103 includes an ink replenishing device 101 and a doctor 102.

  First, ink is replenished from the ink replenishing device 101 to the anilox roll 103, and excess ink out of the ink 108 supplied to the anilox roll 103 is removed by the doctor 102. The ink replenishing device 101 may be a dripping type ink replenishing device, a fountain roll, a slit coater, a die coater, a cap coater such as a cap coater, or a combination thereof. For the doctor 102, a known object such as a doctor roll can be used in addition to the doctor blade. Further, the anilox roll 103 can be made of chromium or ceramics. Further, instead of the cylindrical anilox roll, it is also possible to use a flat anilox plate as the ink supply to the printing relief plate. The flat anilox plate is disposed, for example, at the position of the printing substrate 106 in FIG. 4. After the ink is replenished to the entire surface of the anilox plate by an ink replenishing device, the plate cylinder is rotated to supply ink to the printing substrate. Can be done.

  The ink uniformly held by the doctor on the surface of the anilox roll 103 which is an ink supply body to the printing relief plate is transferred and supplied to the projection pattern of the printing relief plate 104 attached to the plate cylinder 105. Then, as the plate cylinder 105 rotates, the convex pattern of the printing relief plate 104 and the substrate move relatively while in contact with each other, and the ink 108 is transferred to a predetermined position on the printing substrate 106 on the stage 107 to be printed substrate. An ink pattern 108a is formed on the substrate. After the ink pattern is provided on the substrate to be printed, a drying step using an oven or the like can be provided as necessary.

  Note that when printing the ink on the printing relief plate on the printing substrate, the stage 17 to which the printing substrate 106 is fixed may be moved in accordance with the rotation of the plate cylinder 105. FIG. A printing unit including the upper plate cylinder 105, the printing relief plate 104, the anilox roll 103, and the ink replenishing device 101 may be moved in accordance with the rotation of the plate cylinder. In the printing relief plate of the present invention, a resin layer may be formed on the plate cylinder 15 and directly plate-making to form a projection pattern.

FIG. 4 shows a sheet-fed relief printing apparatus that forms an ink pattern on the substrate to be printed one by one. However, in the method for producing a printed material according to the present invention, the substrate to be printed can be wound in a web shape. In some cases, a roll-to-roll relief printing apparatus can be used. roll·
In the case of using a two-roll type letterpress printing apparatus, it is possible to continuously form an ink pattern and to reduce the manufacturing cost.

  Next, a method for producing an organic EL element will be described as an example of a method for producing a printed material using a relief printing plate patterned according to the present invention. The present invention is not limited to this. FIG. 5 shows an explanatory cross-sectional view of the organic EL element of the present invention. There are a passive matrix type and an active matrix type as a driving method of the organic EL element, but the organic EL element of the present invention can be applied to either a passive matrix type organic EL element or an active matrix type organic EL element. .

  The passive matrix method is a method in which stripe-shaped electrodes are opposed to each other so as to be orthogonal to each other, and light is emitted at the intersection, whereas the active matrix method uses a so-called thin film transistor (TFT) substrate in which a transistor is formed for each pixel. Thus, the light is emitted independently for each pixel.

  As shown in FIG. 5, the organic EL element of the present invention has a first electrode 2 in a stripe shape as an anode on a substrate 1. The partition wall is provided between the first electrodes, and preferably covers the first electrode end portion for the purpose of preventing a short circuit due to burrs or the like at the first electrode end portion.

  And the organic EL element of this invention has the organic EL layer which consists of an organic light emitting layer and a light emission auxiliary layer in the area | region (light emission area | region L, pixel part) on the 1st electrode 2 and divided by the partition 7. ing. The organic EL layer sandwiched between the electrodes may be composed of an organic light emitting layer alone, or may be composed of a laminated structure of an organic light emitting layer and a light emission auxiliary layer. Examples of the light emission auxiliary layer include a hole transport layer, a hole injection layer, an electron transport layer, an electron injection layer, and a charge generation layer. In FIG. 5, the structure which consists of a laminated structure of the positive hole transport layer 3 which is a light emission auxiliary layer, and an organic light emitting layer (41, 42, 43) is shown. A hole transport layer 3 is provided on the first electrode 2, and a red (R) organic light-emitting layer 41, a green (G) organic light-emitting layer 42, and a blue (B) organic light-emitting layer 43 are provided on the hole transport layer 3. Is provided.

  Next, the 2nd electrode 5 is arrange | positioned as a cathode so as to oppose the 1st electrode 2 which is an anode on an organic luminescent medium layer. In the case of the passive matrix method, the second electrode is provided in a stripe shape so as to be orthogonal to the first electrode having a stripe shape. In the case of the active matrix method, the second electrode is formed on the entire surface of the organic EL element. Further, although not shown, a sealing body such as a glass cap is provided on the entire effective pixel in order to prevent moisture and oxygen in the environment from entering the first electrode, the organic light emitting layer, the light emitting auxiliary layer, and the second electrode. It is provided and bonded to the substrate via an adhesive.

  The organic EL device of the present invention includes at least a substrate, a patterned first electrode supported by the substrate, an organic light emitting layer, and a second electrode. The organic EL element of the present invention may have a structure in which the first electrode is a cathode and the second electrode is an anode, contrary to FIG. In addition, in order to protect the organic light emitting medium layer and the electrode from the ingress of external oxygen and moisture in place of a sealing body such as a glass cap, a sealing layer having a function of a passivation layer and a protective layer for protecting from external stress, or both, is provided. You may provide a stop base material.

  Next, the manufacturing method of an organic EL element is demonstrated.

  As the substrate according to the present invention, any substrate can be used as long as it has an insulating property. In the case of a bottom emission type organic EL element that extracts light from the substrate side, it is necessary to use a transparent substrate.

  For example, a glass substrate or a quartz substrate can be used as the substrate. Further, it may be a plastic film or sheet such as polypropylene, polyethersulfone, polycarbonate, cycloolefin polymer, polyacrylate, polyamide, polymethyl methacrylate, polyethylene terephthalate, or polyethylene naphthalate. Metal oxide thin film, metal fluoride thin film, metal nitride thin film, metal oxynitride thin film, or polymer resin film for the purpose of preventing moisture from entering the organic light emitting medium layer in these plastic films and sheets You may utilize what laminated | stacked these as a board | substrate.

  In addition, it is more preferable to reduce the moisture adsorbed on the inside or the surface of the substrate as much as possible by performing a heat treatment on these substrates in advance. Further, in order to improve the adhesion depending on the material to be laminated on the substrate, it is preferable to use after performing surface treatment such as ultrasonic cleaning treatment, corona discharge treatment, plasma treatment, UV ozone treatment.

  Further, a thin film transistor (TFT) can be formed on these to form a substrate for an active matrix organic EL element. FIG. 6 shows an explanatory cross-sectional view of an example of the active matrix substrate of the present invention. In the case of the organic EL element substrate of the present invention, the planarization layer 117 is formed on the TFT 120, and the lower electrode (first electrode 2) of the organic EL element is provided on the planarization layer 117. In addition, the TFT and the lower electrode are preferably electrically connected through a contact hole 118 provided in the planarization layer 117. By comprising in this way, the outstanding electrical insulation can be obtained between TFT and an organic EL element.

  The TFT 120 and the organic EL element formed above the TFT 120 are supported by a support 111. The support is preferably excellent in mechanical strength and dimensional stability. Specifically, the materials described above as the substrate can be used.

  As the TFT 120 provided on the support, a known thin film transistor can be used. Specifically, a thin film transistor mainly including an active layer in which a source / drain region and a channel region are formed, a gate insulating film, and a gate electrode can be given. The structure of the thin film transistor is not particularly limited, and examples thereof include a staggered type, an inverted staggered type, a top gate type, and a coplanar type.

The active layer 112 is not particularly limited, and examples thereof include amorphous semiconductor materials such as amorphous silicon, polycrystalline silicon, microcrystalline silicon, cadmium selenide, thiophene oligomers, poly (p-ferylene vinylene), and the like. It can be formed of an organic semiconductor material. These active layers are formed by, for example, laminating amorphous silicon by plasma CVD, ion doping, forming amorphous silicon by LPCVD using SiH ₄ gas, and crystallizing amorphous silicon by solid phase growth. After obtaining silicon, ion doping by ion implantation, LPCVD using Si ₂ H ₆ gas, and amorphous silicon by PECVD using SiH ₄ gas, and excimer laser or other laser After annealing and crystallizing amorphous silicon to obtain polysilicon, polysilicon is laminated by ion doping (low temperature process), low pressure CVD or LPCVD, and thermally oxidized at 1000 ° C. or higher. Gate insulation film Form, the n + polysilicon of the gate electrode 114 is formed thereon, then, a method of ion doping (high temperature process), and the like by an ion implantation method.

As the gate insulating film 113, a film normally used as a gate insulating film can be used. For example, SiO ₂ formed by PECVD, LPCVD, etc., SiO obtained by thermally oxidizing a polysilicon film ₂ etc. can be used.

  As the gate electrode 114, those normally used as the gate electrode can be used. For example, metals such as aluminum and copper, refractory metals such as titanium, tantalum and tungsten, polysilicon, silicide of refractory metals And polycide.

  The TFT 120 may have a single gate structure, a double gate structure, or a multi-gate structure having three or more gate electrodes. Moreover, you may have a LDD structure and an offset structure. Further, two or more thin film transistors may be arranged in one pixel.

  The display device of the present invention needs to be connected so that the thin film transistor (TFT) functions as a switching element of the organic EL element, and the drain electrode 116 of the transistor and the pixel electrode (first electrode 2) of the organic EL element are electrically connected. Connected. Further, it is generally necessary to use a metal that reflects light as a pixel electrode for taking a top emission structure.

  The TFT 120, the drain electrode 116, and the pixel electrode (first electrode 2) of the organic EL element are connected through a connection wiring formed in a contact hole 118 that penetrates the planarizing film 117.

Regarding the material of the planarizing film 117, inorganic materials such as SiO ₂ , spin-on glass, SiN (Si ₃ N ₄ ), TaO (Ta ₂ O ₅ ), organic materials such as polyimide resin, acrylic resin, photoresist material, and black matrix material are used. Materials and the like can be used. Spin coating, CVD, vapor deposition, etc. can be selected according to these materials. If necessary, a contact hole 118 is formed by dry etching, wet etching, or the like at a position corresponding to the lower TFT 120 after photolithography using a photosensitive resin as the planarizing layer, or once the planarizing layer is formed on the entire surface. Form. The contact hole is then filled with a conductive material to establish conduction with the pixel electrode formed in the upper layer of the planarization layer. The thickness of the planarizing layer is not limited as long as it can cover the lower TFT, capacitor, wiring, etc., and the thickness may be several μm, for example, about 3 μm.

  A first electrode 2 is provided on the substrate. When the first electrode is used as an anode, the material is a metal composite such as ITO (indium tin composite oxide), IZO (indium zinc composite oxide), tin oxide, zinc oxide, indium oxide, zinc aluminum composite oxide. A single layer or a stacked layer of metal materials such as oxide, gold, platinum, and chromium can be used. As a method for forming the first electrode, a dry film forming method such as a resistance heating vapor deposition method, an electron beam vapor deposition method, a reactive vapor deposition method, an ion plating method, or a sputtering method can be used.

  In addition, ITO is preferably used because of its low resistance, solvent resistance, and high transparency when the bottom mission method is adopted. ITO is formed on the glass substrate by sputtering, and is patterned by photolithography to form the first electrode 2.

After the first electrode 2 is formed, the partition wall 7 is formed so as to cover the first electrode edge. The partition 7 needs to have insulating properties, and a photosensitive material or the like can be used. The photosensitive material may be a positive type or a negative type, a photo-curing resin of a photo radical polymerization system, a photo cationic polymerization system, or a copolymer containing an acrylonitrile component, polyvinyl phenol, polyvinyl alcohol. , Novolac resin, polyimide resin, cyanoethyl pullulan, and the like can be used. Further, SiO ₂ , TiO ₂ or the like can be used as the partition wall forming material.

When the partition wall forming material is a photosensitive material, the entire surface of the forming material solution is coated by a slit coating method or a spin coating method, and then patterning is performed by a photolithography method such as exposure and development. In the case of the spin coating method, the height of the partition wall can be controlled by conditions such as the number of rotations when spin coating, but there is a limit height in one coating, and if it is higher than that, multiple spin coatings are performed. Use an iterative approach.

  When the barrier rib is formed by a photolithography method using a photosensitive material, its shape can be controlled by exposure conditions and development conditions. For example, when a negative photosensitive resin is applied, exposed and developed, and then post-baked to obtain a partition wall, if the shape of the partition wall end portion is to have a forward tapered shape, development under this development condition The type, concentration, temperature, or development time of the liquid may be controlled. If the development conditions are mild, the partition wall ends have a forward taper shape, and if the development conditions are severe, the partition wall ends have a reverse taper shape.

Further, when the partition wall forming material is SiO ₂ or TiO ₂ , it can be formed by a dry film forming method such as a sputtering method or a CVD method. In this case, patterning of the partition walls can be performed by a mask or a photolithography method.

  Next, an organic EL layer composed of an organic light emitting layer and a light emission auxiliary layer is formed. The organic EL layer sandwiched between the electrodes may be composed of an organic light emitting layer alone, an organic light emitting layer and a hole transport layer, a hole injection layer, an electron transport layer, an electron injection layer, a charge generation layer, etc. It is good also as a laminated structure with the light emission auxiliary layer for assisting light emission. The hole transport layer, hole injection layer, electron transport layer, electron injection layer, and charge generation layer are appropriately selected as necessary.

  In the present invention, at least one of the organic EL layers composed of a light emitting auxiliary layer such as an organic light emitting layer, a hole transport layer, a hole injection layer, an electron transport layer, an electron injection layer, and a charge generation layer is used as an organic EL layer material. Is formed by printing above the first electrode by a relief printing method using a resin relief plate having a projection pattern made of resin on a substrate and using a resin dissolved or dispersed in a solvent. Can be applied. Hereinafter, in the present invention, a case where an organic light emitting ink in which an organic light emitting material is dissolved or dispersed in a solvent is used will be described.

  The organic light emitting layer is a layer that emits light when an electric current is passed. Organic light-emitting materials formed by the organic light-emitting layer include 9,10-diarylanthracene derivatives, pyrene, coronene, perylene, rubrene, 1,1,4,4-tetraphenylbutadiene, tris (8-quinolato) aluminum complex, tris (4-methyl-8-quinolato) aluminum complex, bis (8-quinolato) zinc complex, tris (4-methyl-5-trifluoromethyl-8-quinolato) aluminum complex, tris (4-methyl-5-cyano-) 8-quinolate) aluminum complex, bis (2-methyl-5-trifluoromethyl-8-quinolinolate) [4- (4-cyanophenyl) phenolate] aluminum complex, bis (2-methyl-5-cyano-8-quinolinolate) [4- (4-cyanophenyl) phenolate] aluminum complex, Lis (8-quinolinolato) scandium complex, bis [8- (para-tosyl) aminoquinoline] zinc complex and cadmium complex, 1,2,3,4-tetraphenylcyclopentadiene, poly-2,5-diheptyloxy- A low molecular weight light emitting material such as para-phenylene vinylene can be used.

  Also, coumarin phosphors, perylene phosphors, pyran phosphors, anthrone phosphors, polyphyrin phosphors, quinacridone phosphors, N, N′-dialkyl-substituted quinacridone phosphors, naphthalimide phosphors, A material obtained by dispersing a low molecular weight light emitting material such as an N, N′-diaryl-substituted pyrrolopyrrole fluorescent material or a phosphorescent light emitting material such as an Ir complex in a polymer can be used. As the polymer, polystyrene, polymethyl methacrylate, polyvinyl carbazole and the like can be used.

Also, poly (2-decyloxy-1,4-phenylene) (DO-PPP) and poly [2,
PPP derivatives such as 5-bis- [2- (N, N, N-triethylammonium) ethoxy] -1,4-phenyl-alt-1,4-phenyllene] dibromide, poly [2- (2′- Ethylhexyloxy) -5-methoxy-1,4-phenylenevinylene] (MEH-PPV), poly [5-methoxy- (2-propanoxysulfonide) -1,4-phenylenevinylene] (MPS-PPV), Poly [2,5-bis- (hexyloxy) -1,4-phenylene- (1-cyanovinylene)] (CN-PPV), poly (9,9-dioctylfluorene) (PDAF), polyspirofluorene, etc. It may be a molecular light emitting material. Examples thereof include polymer precursors such as a PPV precursor and a PPP precursor. Other existing light emitting materials can also be used.

  Examples of the hole transport material forming the hole transport layer include metal phthalocyanines such as copper phthalocyanine and tetra (t-butyl) copper phthalocyanine, and metal-free phthalocyanines, quinacridone compounds, 1,1-bis (4-di-p -Tolylaminophenyl) cyclohexane, N, N′-diphenyl-N, N′-bis (3-methylphenyl) -1,1′-biphenyl-4,4′-diamine, N, N′-di (1- Naphthyl) -N, N′-diphenyl-1,1′-biphenyl-4,4′-diamine and other aromatic amine-based low molecular hole injection transport materials, polyaniline, polythiophene, polyvinylcarbazole, poly (3,4 -Ethylenedioxythiophene) and polymer hole transport materials such as polystyrene sulfonic acid mixtures, thiophene oligomer materials, and other existing positive It can be selected from among transport material.

  Examples of the electron transport material for forming the electron transport layer include 2- (4-bifinylyl) -5- (4-tert-butylphenyl) -1,3,4-oxadiazole, 2,5-bis (1 -Naphtyl) -1,3,4-oxadiazole, oxadiazole derivatives, bis (10-hydroxybenzo [h] quinolinolato) beryllium complexes, triazole compounds, and the like can be used.

  Solvents that dissolve or disperse the organic light emitting material include toluene, xylene, acetone, hexane, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, methanol, ethanol, isopropyl alcohol, ethyl acetate, butyl acetate, 2-methyl- (t-butyl) Benzene, 1,2,3,4-tetramethylbenzene, pentylbenzene, 1,3,5-triethylbenzene, cyclohexylbenzene, 1,3,5-tri-isopropylbenzene and the like can be used alone or in combination. . Moreover, surfactant, antioxidant, a viscosity modifier, a ultraviolet absorber, etc. may be added to organic luminescent ink as needed.

  Examples of the solvent for dissolving or dispersing the hole transport material and the electron transport material include, for example, toluene, xylene, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, methanol, ethanol, isopropyl alcohol, ethyl acetate, butyl acetate, water and the like Alternatively, a mixed solvent thereof can be used. In particular, water or alcohols are suitable when forming a hole transport material into an ink.

  The organic light emitting layer and the light emission auxiliary layer are formed by a wet film forming method. Note that in the case where these layers have a laminated structure, it is not necessary to form all of the layers by a wet film formation method. As the wet film forming method, spin coating method, die coating method, dip coating method, discharge coating method, pre-coating method, roll coating method, bar coating method and the like, relief printing method, inkjet printing method, offset printing method, Examples of the printing method include a gravure printing method. In particular, when patterning organic light emitting layers of three colors of RGB, it can be selectively formed on the pixel portion by a printing method, and an organic EL element capable of color display can be manufactured. The film thickness of the organic light emitting medium layer is 1000 nm or less, preferably 50 nm to 150 nm, even when formed by a single layer or stacked layers.

  Again, the present invention is not only for forming an organic light emitting layer by a relief printing method using an organic light emitting ink, but also for a hole transport layer or an electron transport layer by a relief printing method using a hole transport ink or an electron transport ink. It can also be used when forming a light emission auxiliary layer.

  Next, a second electrode is formed. When the second electrode is a cathode, a material having high electron injection efficiency is used as the material. Specifically, a single metal such as Mg, Al, or Yb is used, or a compound such as Li, oxidized Li, or LiF is sandwiched by about 1 nm at the interface in contact with the light emitting medium, and Al or Cu having high stability and conductivity is laminated. And use. Or, in order to achieve both electron injection efficiency and stability, one or more metals such as Li, Mg, Ca, Sr, La, Ce, Er, Eu, Sc, Y, Yb, etc., which have low work function, and stable Ag, Al An alloy system with a metal element such as Cu is used. Specifically, alloys such as MgAg, AlLi, and CuLi can be used. Further, in the case of a top emission type organic EL device, the cathode needs to have transparency, and for example, transparency can be achieved by a combination of these metals and a transparent conductive layer such as ITO.

  As a method for forming the second electrode, a dry film formation method such as a resistance heating vapor deposition method, an electron beam vapor deposition method, a reactive vapor deposition method, an ion plating method, or a sputtering method can be used. Moreover, when it is necessary to make a 2nd electrode into a pattern, it can pattern by a mask etc. The thickness of the second electrode is preferably 10 nm to 1000 nm. In the present invention, the first electrode can be a cathode and the second electrode can be an anode.

  As an organic EL element, it is possible to emit light by sandwiching an organic light emitting layer between electrodes and letting an electric current flow. However, some of the organic light emitting material, the light emission auxiliary layer forming material, and the electrode forming material contain moisture in the atmosphere. Since it is easily deteriorated by oxygen, a sealing body is usually provided for shielding from the outside.

  For example, the sealing body includes a first electrode, an organic light emitting layer, a light emitting auxiliary layer, and a substrate on which the second electrode is formed. Then, sealing is performed by adhering the cap and the substrate with an adhesive around the peripheral portion so that the concave portion hits the second electrode.

  In addition, the sealing body is provided with a resin layer on a sealing material with respect to the substrate on which, for example, the first electrode, the organic light emitting layer, the light emission auxiliary layer, and the second electrode are formed. It is also possible to carry out by bonding the substrates.

At this time, the sealing material needs to be a base material having low moisture and oxygen permeability. Examples of the material include ceramics such as alumina, silicon nitride, and boron nitride, glass such as alkali-free glass and alkali glass, metal foil such as quartz, aluminum, and stainless steel, and moisture-resistant film. Examples of moisture-resistant films include films formed by CVD of SiOx on both sides of plastic substrates, films with low permeability and water-absorbing films, or polymer films coated with a water-absorbing agent. The water vapor transmission rate is preferably 10 ⁻⁶ g / m ² / day or less.

  Examples of the resin layer include a photo-curing adhesive resin made of an epoxy resin, an acrylic resin, a silicone resin, a thermosetting adhesive resin, a two-component curable adhesive resin, and an ethylene ethyl acrylate (EEA) polymer. Examples thereof include acrylic resins, vinyl resins such as ethylene vinyl acetate (EVA), thermoplastic resins such as polyamide and synthetic rubber, and thermoplastic adhesive resins such as acid-modified products of polyethylene and polypropylene. Examples of methods for forming a resin layer on a sealing material include solvent solution method, extrusion lamination method, melting / hot melt method, calendar method, nozzle coating method, screen printing method, vacuum laminating method, hot roll laminating method, etc. Can be mentioned. A material having a hygroscopic property or an oxygen absorbing property may be contained as necessary. Although the thickness of the resin layer formed on a sealing material is arbitrarily determined by the magnitude | size and shape of the organic EL element to seal, about 5-500 micrometers is desirable.

  The substrate on which the first electrode, the organic light emitting layer, the light emission auxiliary layer, and the second electrode are formed and the sealing body are bonded together in a sealing chamber. When the sealing body has a two-layer structure of a sealing material and a resin layer, and a thermoplastic resin is used for the resin layer, it is preferable to perform only pressure bonding with a heated roll. When a thermosetting adhesive resin is used, it is preferable to perform heat curing at a curing temperature after pressure bonding with a heated roll. In the case where a photocurable adhesive resin is used, curing can be performed by further irradiating light after pressure bonding with a roll. Note that although the resin layer is formed over the sealing material here, the resin layer can be formed over the substrate and bonded to the sealing material.

  Before or instead of sealing with a sealing body, for example, as a passivation film, it is also possible to form a sealing body with an inorganic thin film, such as a silicon nitride film having a thickness of 150 nm using a CVD method. It is also possible to combine these.

  Examples will be described below.

(Preparation of printed substrate)
An ITO film was formed on a 300 mm square glass substrate by sputtering, and the ITO film was patterned in a stripe shape by photolithography and etching with an acid solution. The line pattern of ITO as the anode was a pattern in which the line width was 100 μm, the space was 50 μm, and the line was formed with 192 lines. A 1.5 wt% aqueous solution of poly (3,4) ethylenedioxythiophene / polystyrene sulfonic acid (PEDOT / PSS) was formed to a thickness of 100 nm as a hole transport layer using a spin coater. Further, the PEDOT / PSS thin film thus formed was dried at 100 ° C. for 1 hour under reduced pressure to produce a substrate to be printed.

(Preparation of organic light emitting layer forming ink)
The following organic light-emitting inks comprising three colors of red, green, and blue (RGB) were prepared.
Red light emitting ink (R): 1% by weight toluene solution of polyfluorene derivative (Red light emitting material trade name Red1100 manufactured by Sumitomo Chemical Co., Ltd.)
Green light emitting ink (G): 1% by weight toluene solution of polyfluorene derivative (Green light emitting material, trade name Green 1300, manufactured by Sumitomo Chemical Co., Ltd.)
Blue luminescent ink (B): 1% by weight toluene solution of polyfluorene derivative (blue luminescent material, trade name Blue 1100 manufactured by Sumitomo Chemical Co., Ltd.)

(Preparation of printing letterpress)
A solvent-resistant photosensitive resin mainly composed of polyamide is melt-coated on the surface of a SUS304 base material having a thickness of 200 μm so that the total thickness of the plate material becomes 1.1 mm, and the photosensitive material that forms the relief plate Resin material was formed. A film mask manufactured by Tokyo Process Service Co., Ltd., having a negative pattern (opening line width 100 μm, non-opening space 350 μm, total number of lines 64) corresponding to the above-described substrate to be printed is adhered to this plate material under a reduced pressure of 70 mmHg. It exposed with the ultraviolet point light source made from a company. After exposure, immersion in water for 5 seconds, spray development for 5 minutes, spray washing for 1 minute, removal of excess cleaning solution with compressed air (196 kPa) for 2 minutes, and then normal pressure set to 70 ° C In an oven for 20 minutes. Thereby, a relief plate having a projection height of 620 μm, a projection line width of 100 μm, and a space of 350 μm was formed. In addition, in order to produce an organic EL display, plate making was performed separately for each color of red, blue, and green.

(Manufacture of organic EL elements)
The relief printing plate for high-definition printing was fixed to a cylinder of a sheet-fed printing press. Using this and the above-described organic light emitting ink, printing was performed for each color on the substrate to be printed. The organic light emitting layer was printed so that the red organic light emitting layer, the green organic light emitting layer, and the blue organic light emitting layer were arranged in a stripe shape. After printing for each color, drying was performed in an oven at 130 ° C. for 1 hour. The average film thickness of each color of the formed pattern was 102 nm. After drying, a 10 nm film of calcium was formed on the organic light emitting layer formed by printing, and then silver was vacuum deposited on the film by 300 nm, and finally sealed using a glass cap to produce the organic EL device of the present invention. . As a result of examining the light emission characteristics of the organic EL element, uniform light emission with an average luminance of 183 cd / m ² and a luminance variation of ± 2.3% was obtained at 5 V over the entire surface of the pattern portion.
<Comparative example>

(Preparation of printing letterpress)
A solvent-resistant photosensitive resin mainly composed of polyamide is melt-coated on the surface of a SUS304 base material having a thickness of 200 μm so that the total thickness of the plate material becomes 1.1 mm, and the photosensitive material that forms the relief plate Resin material was formed. A film mask manufactured by Tokyo Process Service Co., Ltd., having a negative pattern (opening line width 100 μm, non-opening space 350 μm, total number of lines 64) corresponding to the above-described substrate to be printed is adhered to this plate material under a reduced pressure of 70 mmHg. It exposed with the ultraviolet point light source exposure machine by a company. After exposure, a brush for hand development used in a resin plate for general printing applications in which a brush with an average diameter of 100 μm is placed on a 10 cm square plastic plate in a grid pattern with a diameter of 5 mm and an interval of 1 cm is used. Development was performed while rubbing for a minute. After washing with running water, excess washing solution was removed with compressed air (196 kPa) for 2 minutes, and then dried in a normal pressure oven set at 70 ° C. for 20 minutes. Thereby, a relief plate having a projection height of 620 μm, a projection line width of 100 μm, and a space of 350 μm was formed. In addition, in order to produce an organic EL display, plate making was performed separately for each color of red, blue, and green.

(Manufacture of organic EL elements)
The relief printing plate for high-definition printing was fixed to a cylinder of a sheet-fed printing press. Using this and the above-described organic light emitting ink, printing was performed for each color on the substrate to be printed. The organic light emitting layer was printed so that the red organic light emitting layer, the green organic light emitting layer, and the blue organic light emitting layer were arranged in a stripe shape. After printing for each color, drying was performed in an oven at 130 ° C. for 1 hour. As for the film thickness of the formed pattern, the average value of each color was 108 nm. After drying, a 10 nm film of calcium was formed on the organic light emitting layer formed by printing, and then silver was vacuum deposited on the film by 300 nm, and finally sealed using a glass cap to produce the organic EL device of the present invention. . When the light emission characteristics of this organic EL element were observed, the light emission with an average luminance of 178 cd / cm ² and a luminance variation of ± 18.6% was obtained at 5 V over the entire surface of the pattern portion, which was inferior to the examples.

It is explanatory drawing which showed an example of the relief printing plate concerning this invention in the cross section. It is explanatory drawing which showed in cross section an example of the manufacturing method of the relief printing plate concerning this invention. It is explanatory drawing which showed typically an example of the developing device which concerns on this invention. It is the schematic of an example of the relief printing apparatus used for manufacture of the printed matter of this invention. It is explanatory drawing which showed an example of the organic EL element which concerns on this invention in the cross section. It is explanatory sectional drawing of an example of the board | substrate of the active matrix system of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Substrate 2 ... 1st electrode 3 ... Hole transport layer 41 ... Organic light emitting layer 42 ... Organic light emitting layer 43 ... ... Organic light emitting layer 5 ... Second electrode 7 ... Partition 8 ... Sealing material 9 ... Resin layer 101 ... Ink replenishment Device 102 ... Doctor 103 ... Anilox roll 104 ... Printing plate 105 ... Plate cylinder 106 ... Substrate 107 ... Stage 108 ... Ink 108a ... Ink pattern 111 ... Support 114 ... Gate electrode 117 ... Flattening layer 118 ... Contact hole 120 ... TFT
200... Substrate 201... Convex pattern 202 a... Photosensitive resin 202 b... Cured photopolymer 204... Glass substrate 205. Photomask 207 ... Active energy ray

Claims (6)

A manufacturing method for forming a resin relief plate for forming a fine electronic circuit pattern by a printing method by exposing and developing a photosensitive resin containing at least a water-soluble polymer provided in a flat plate material in a pattern, Development process
First, a first step of immersing the exposed plate material in a developer,
Secondly, a second step of removing unnecessary portions after exposure by a developer sprayed from a spray-type jet nozzle,
A third step of developing solution after development is cleaned by the cleaning liquid ejected from the spray-type spout Thirdly,
Fourth, a fourth step of removing the cleaning liquid by the gas injected from the injection port,
I have a,
The second step is a step of circulating in the circulation tank using water having a pH of 5.8 or more and 8.6 or less as the developer, and circulating the developer.
The third step is a step in which water having a pH of 5.8 or more and 8.6 or less is used as the cleaning liquid and cleaning is performed while always replacing the cleaning liquid using a non-circulating tank.
The method from the first step to the fourth step is carried out while the exposed plate material is conveyed by a roller . A developing device for forming a resin relief plate for forming a fine electronic circuit pattern by a printing method by developing a plate-shaped plate material in which a photosensitive resin containing at least a water-soluble polymer is exposed in a pattern,
First, an immersion means for immersing the exposed plate material in a developer,
Second, developing means for removing unnecessary portions after exposure with a developer sprayed from a spray-type jet outlet,
Thirdly, a cleaning means in which the developer after development is cleaned with a cleaning liquid sprayed from a spray-type jet nozzle,
A washing solution removing means for removing the cleaning liquid by the gas ejected from the fourth to the injection port, was closed,
The developing means circulates in a circulation tank using water having a pH of 5.8 or more and 8.6 or less as a developer, and circulates and uses the developer.
In the cleaning means, water having a pH of 5.8 or more and 8.6 or less is used as a cleaning liquid, and cleaning is performed while always replacing the cleaning liquid using a non-circulating tank.
A developing device of the resin relief plate, characterized in that have a roller for conveying the exposed printing plate from the immersion section to said cleaning liquid removal means. It is a manufacturing method of printed matter using the resin letterpress manufactured by the manufacturing method of the resin letterpress of Claim 1 ,
Replenishing ink from an ink replenisher onto the anilox roll;
Removing excess ink on the anilox roll with a doctor;
Supplying ink on the anilox roll to the resin relief plate;
Transferring the ink on the resin relief printing plate onto the substrate to be printed;
A method for producing printed matter, comprising: The method for producing a printed matter according to claim 3, wherein the ink replenishing device is any one of a slit coater, a die coater, and a cap coater.   The method for producing a printed matter according to claim 3 or 4, wherein the doctor is a doctor roll. A method for producing an organic EL device having at least a first electrode, a hole transport layer on the first electrode, an organic light emitting layer on the hole transport layer, and a second electrode on the organic light emitting layer on a TFT substrate. There,
The hole transport layer is formed by the method for producing a printed material according to any one of claims 3 to 5 using a hole transport ink,
The organic light emitting layer is formed by separately coating organic light emitting inks of red, green, and blue colors on the hole transport layer by the method for producing a printed material according to any one of claims 3 to 5. Manufacturing method of organic EL element.

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