JP2006190583A - Organic electronic device and manufacturing method of the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an organic EL device of which moisture absorbing agent is prevented from spreading over an adhesive agent applied area, wherein a substrate on which a light emitting element is formed and a sealing cap are stuck by adhesive agent, and a moisture absorbing agent film is formed by applying moisture absorbing agent solution on inner face of the sealing cap. <P>SOLUTION: A glass substrate 12, on which a light emitting element is formed, and the sealing cap are adhered by an adhesive agent. On the sealing cap 11, a recess-shaped part 113 and a convex-shaped part 114 are formed between a convex-shaped part 111 on which the adhesive agent is applied and a recess-shaped part 112 on which a moisture absorbing agent film 21 is formed by heating and hardening the moisture absorbing agent solution. When applying the moisture absorbing agent solution on the recess-shaped part 112, even if the moisture absorbing agent solution spreads outside the recess-shaped part 112 by vibration of the sealing cap 11 or the like, it does not go further than forming a moisture absorbing film 211 on a face opposed to a substrate 12 of the convex-shaped part 114, and does not spread over a face of the convex-shaped part 111 on which the adhesive agent 14 is to be applied. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an organic electronic device and a method for producing an organic electronic device in which a water catching agent film is formed using a water catching agent solution, and particularly to an organic EL device (organic electroluminescence device) and an organic EL device producing method. Is suitable.

An organic EL device equipped with a conventional water catching agent will be described with reference to FIGS.
First, FIG. 8 will be described.
8A is a cross-sectional view of the organic EL device, FIG. 8B is a plan view of the sealing cap in the X1 direction of FIG. 8A, and FIG. 8C is FIG. 8A. It is an expanded sectional view of X2 part.
The organic EL device of FIG. 8 has a powdered water capturing agent mounted therein (see, for example, Patent Document 1).
The organic EL device shown in FIG. 8 includes a glass substrate 52 and a glass sealing cap 51, and both are bonded by an adhesive 54. A light emitting element 53 is formed on the substrate 52, which includes a first electrode, a second electrode, and a light emitting layer (not shown) made of an organic material between the two electrodes. The sealing cap 51 has a convex portion 511 formed in the peripheral portion, and a concave portion 513, a convex portion 514, and a concave portion 512 are formed inside thereof. The concave portion 512 is filled with a powdery water catching agent 61, and the opening of the concave portion 512 is covered with a semipermeable membrane 62 through which oxygen and water vapor pass to hold the water catching agent 61. The adhesive 54 uses a thermosetting resin, an ultraviolet curable resin, or the like.

In the case of the organic EL device of FIG. 8, since the water capturing agent 61 is in a powder form, the concave portion 512 must be filled with the semipermeable membrane 62 after filling the concave portion 512. Therefore, it is not easy to install the water catching agent. Further, since the water catching agent 61 is separated from the space for accommodating the light emitting element 53 by the semipermeable membrane 62 and is not directly disposed in the space, the water catching effect in the space is reduced. Further, since the water catching agent 61 is powdery and opaque, the light emitting element 53 cannot be observed from the outside of the sealing cap 51. That is, the method of attaching the water catching agent in FIG. 8 cannot be applied to an organic EL device of a type in which the light emitting element 53 is observed from the outside of the sealing cap 51.
Therefore, the inventor of the present application has studied a method of forming a transparent water capturing agent film inside an organic EL device using a water capturing agent solution.

FIG. 9 shows an organic EL device having a transparent water capturing agent film formed therein, which was experimentally manufactured by the present inventor.
9A is a cross-sectional view of the organic EL device, FIG. 9B is a plan view of the sealing cap in the X3 direction of FIG. 9A, and FIGS. 9C and 9D are It is an expanded sectional view of the X4 part of Fig.9 (a).
The organic EL device shown in FIG. 9 includes a glass substrate 52 and a glass sealing cap 51, and both are bonded by an adhesive 54. The substrate 52 is provided with a light emitting element 53 including a first electrode, a second electrode, and a light emitting layer (not shown) made of an organic material between the two electrodes. The sealing cap 51 has a convex portion 511 formed in the peripheral portion and a concave portion 512 formed therein. An adhesive 54 is applied to the surface of the convex portion 511 facing the substrate 52 (substrate facing surface), and the water capturing agent film 7 is formed on the inner surface of the concave portion 512.

The water catching agent film 7 is formed by applying a water catching agent solution in which a water catching agent is dissolved in a solvent to the concave portion 512 and drying by heating. As the adhesive 54, an ultraviolet curing epoxy adhesive is used.
In the case of the organic EL device of FIG. 9, when a water catching agent solution is applied to the concave portion 512 and heated and dried, the water catching agent solution is formed in the concave portion 512 as shown in FIG. Crawling up the side wall. At that time, the scooping increases the corners of the four corners of the concave portion 512. On the other hand, since the depth of the concave portion 512 of the sealing cap 51 is about 0.3 mm, the sealing cap 51 is inclined when the amount of the water capturing agent solution applied to the concave portion 512 is large, or during the application work. When it vibrates, the water capturing agent solution spreads to the substrate facing surface of the convex portion 511 and forms the water capturing agent film 71 on the substrate facing surface of the convex portion 511 as shown in FIG. To do. Further, in order to enhance the water trapping effect, as shown in FIG. 9D, when the water trapping agent solution is applied (supplied) thickly to the extent that the concave portion 512 is filled, the water trapping agent solution becomes convex portion 511 due to surface tension. The water catching agent film 71 is formed on the substrate facing surface.
When the water capturing agent film 71 is formed on the substrate facing surface of the convex portion 511, when the adhesive 54 is applied to the substrate facing surface, a part of the adhesive 54 is applied on the water capturing agent film 71. Therefore, adhesive strength will fall.

JP 2002-359071 A

  As described above, the organic EL device of FIG. 8 is filled with a powdered water catching agent in a concave portion, and the concave portion must be closed with a semipermeable membrane, so that the mounting operation of the water catching agent is easy. In addition, since the water trapping agent is isolated from the space that houses the light emitting element by the semipermeable membrane, the water trapping effect of the space is reduced. Moreover, since the organic EL device of FIG. 8 uses a powdery water catching agent, the light emitting element cannot be observed from the outside of the sealing cap.

  As described above, the organic EL device of FIG. 9 can be applied to the adhesive application surface of the sealing cap by tilting or vibrating the sealing cap when the water capturing agent solution is applied. Will spread. In particular, in order to enhance the water capturing effect, it becomes easier to spread when the water capturing agent solution is applied thickly. For this reason, when applying the water catcher solution, vibration and inclination of the sealing cap must be avoided as much as possible, resulting in poor workability. In addition, in order to apply the water catching agent solution thickly, the concave portion to which the water catching agent solution is applied must be deeply formed. However, if the concave portion is deepened, the plate thickness of the sealing cap becomes thick. Becomes thick and it takes time to form the concave portion.

  The invention of the present application aims to solve the above-mentioned problems of conventional organic EL devices and organic EL device manufacturing methods, and in particular, in an organic EL device to which the water catching agent solution of FIG. Prevents the water catcher solution from spreading to the adhesive-coated surface of the sealing cap without reducing the workability when applying the water catching agent solution and without increasing the thickness of the sealing cap. The purpose is to do.

In order to achieve the object of the present invention, the organic electronic device according to claim 1 is an organic electronic device in which a substrate on which an electronic element is formed and a sealing cap on which a water capturing agent film is formed are bonded with an adhesive. In the sealing cap, an adhesive coating convex portion having an adhesive coating surface is formed, and a water trapping film forming concave portion is formed on the inner side of the adhesive coating convex portion. A separation concave portion is formed between the adhesive application convex portion and the water catching agent film forming concave portion, and the both portions are formed between the separation concave portion and the water catching agent film forming concave portion. The water-absorbing agent film forming concave portion is coated with a water-absorbing agent having a liquid form and dried to form a water-absorbing agent membrane.
The organic electronic device according to claim 2 is an organic electronic device in which a substrate on which an electronic element is formed and a sealing cap on which a water capturing agent film is formed are bonded with an adhesive. Forming an adhesive coating step portion having a surface, and forming a water trapping film forming concave portion for forming a water trapping agent film inside the adhesive coating step portion; A separation concave portion that separates the two parts is formed between the liquid medicine film forming concave parts, and a separation wall that separates both parts is formed between the separation concave parts and the water trapping film formation concave part, and the separation concave shape A separation wall that separates the two parts is formed between the part and the adhesive application stepped part, and a water catching agent having a liquid form is applied to the concave part forming the water catching agent film and dried to catch the water. An agent film is formed.
The organic electronic device according to claim 3 is the organic electronic device according to claim 1 or 2, wherein the electronic element is a light emitting element, and the organic electronic device is an organic EL device. .
An organic electronic device according to a fourth aspect is the organic electronic device according to the first or second aspect, wherein a separation wall separating the two portions between the separation concave portion and the water catching agent film forming concave portion is provided. A water capturing agent film is formed on the top.
The organic electronic device according to claim 5 is the organic electronic device according to claim 4, wherein the water capturing agent film formed on the top of the separation wall is formed along the entire circumference of the top of the separation wall, It is closely attached to the substrate on which the electronic element is formed.
The organic electronic device according to claim 6 is the organic electronic device according to claim 1 or 2, wherein a plurality of the separation concave portions are formed.
The organic electronic device manufacturing method according to claim 7, wherein the substrate is provided with an adhesive-applied convex portion having an adhesive-applied surface on the substrate, and a water-collecting agent film-forming concave portion that forms a water-absorbing agent film on the inner side of the adhesive-applied convex portion Separation part separating the two parts between the adhesive application convex part and the water catching agent film forming concave part, and separating both parts between the separating concave part and the water catching film forming concave part Form a separation wall to make a sealing cap,
Applying a water capturing agent having a liquid form to the water capturing agent film forming concave portion, and drying to form a water capturing agent film,
An adhesive is applied between the adhesive-applied surface of the adhesive-applied convex portion of the sealing cap and the substrate on which the electronic element is formed, and the adhesive is cured to form the electronic element. The substrate and the sealing cap are bonded together.
The organic electronic device manufacturing method according to claim 8, wherein the substrate is provided with an adhesive-coated stepped portion having an adhesive-coated surface, and a water-collecting agent film-forming concave shape is formed on the inside of the adhesive-coated stepped portion. Separation concave part separating the two parts between the adhesive application stepped part and the water catching agent film forming concave part, separating the two parts between the separating concave part and the water catching agent film forming concave part Form a sealing cap by forming a separation wall that separates both the wall, and the separation concave portion and the adhesive application stepped portion,
Applying a water capturing agent having a liquid form to the water capturing agent film forming concave portion, and drying to form a water capturing agent film,
A substrate on which the electronic device is formed by applying an adhesive between the adhesive-coated surface of the adhesive coating step of the sealing cap and the substrate on which the electronic device is formed, and curing the adhesive. And the sealing cap.
The organic electronic device manufacturing method according to claim 9 is the organic electronic device manufacturing method according to claim 7 or claim 8, wherein the electronic element is a light emitting element and the organic electronic device is an organic EL device. It is characterized by.
The organic electronic device according to claim 10 is an organic electronic device in which a substrate on which an electronic element is formed and a sealing cap on which a water capturing agent film is formed are bonded with an adhesive. An area is formed, and a water trapping film forming area is formed inside the adhesive coating area to form a water trapping film, and the two areas are separated between the adhesive coating area and the water trapping film forming area. Forming a separation concave portion, and forming a separation wall separating the separation concave portion and the water capturing agent film forming area between the separation concave portion and the water capturing agent film forming area, A water catching agent having a liquid form is applied and dried to form a water catching agent film.
The organic electronic device manufacturing method according to claim 11 includes an adhesive application area on the substrate, a water capturing film forming area for forming a water capturing film on the inside of the adhesive applying area, an adhesive applying area, and a water capturing film. A separation concave portion that separates the two areas is formed between the formation areas, and a separation wall that separates the separation concave portion and the water capturing agent film formation area is formed between the separation concave portion and the water capturing agent film formation area. Make a stop cap,
Applying a water catching agent having a liquid form to the water catching agent film forming area, drying to form a water catching agent film,
Applying an adhesive between the adhesive application surface of the adhesive application area of the sealing cap and the substrate on which the electronic element is formed, and curing the adhesive to form the electronic element; and The sealing cap is adhered.

The sealing cap of the present invention forms a concave portion (separation concave portion) that separates both areas between the adhesive application area and the water catching agent film forming area, and the separation concave portion and the water catching agent film forming area are formed. Since the convex part (separation convex part) which forms a separation wall is formed in between (around the water trapping agent film formation area), when applying the water trapping agent solution to the water trapping agent film formation area, The water capturing agent solution does not spread to the adhesive application area. That is, since the water capturing agent film is not formed on the adhesive-coated surface of the sealing cap, the adhesive strength between the sealing cap and the substrate does not decrease. Also, when applying the water capturing agent solution to the sealing cap, the water capturing agent solution does not spread to the adhesive application area even if the sealing cap vibrates or tilts. Becomes easier and workability is improved.
Since the sealing cap of the present invention can prevent the water capturing agent solution from spreading to the adhesive application area, the water capturing agent solution can be thickly applied to the water capturing agent film forming area (water capturing agent film forming concave portion), As a result, it is possible to increase the water capturing effect by forming a thick water capturing agent film. Moreover, even if a water catcher solution spreads to the convex part (separation convex part) around a water catcher film formation area and forms a water catcher film, the water catcher film is the water catcher film formation area. The water-capturing effect can be exhibited in the same manner as the water-capturing agent film.

  In an organic electronic device according to an embodiment of the present invention, a substrate on which an electronic element is formed and a sealing cap are bonded with an adhesive. The sealing cap is formed with a convex part (adhesive application convex part) for applying an adhesive in the peripheral part in a frame shape or ring shape, and inside the adhesive application convex part (the center of the sealing cap). Part) is formed with a concave part (water catching agent film forming concave part) that forms a water catching agent film by applying the water catching agent solution, and between the adhesive application convex part and the water catching agent film forming concave part. Is formed with a concave portion (separating concave portion) that separates the two portions. A convex portion (separation convex portion) that forms a wall (separation wall) that separates the two portions is formed between the water catching agent film forming concave portion and the separation concave portion. One or more separation concave portions and one separation convex portion are formed.

  An embodiment of the present invention will be described with reference to FIGS. An example is an example of an organic EL device which is a kind of organic electronic device. In addition, the same code | symbol is used for the part common to each figure.

FIG. 1 shows a cross-sectional view and a plan view of an organic EL device according to Example 1. FIG.
1A is a cross-sectional view of the organic EL device, and FIG. 1B is a plan view of the sealing cap in the Y1 direction of FIG. 1A. FIG. 1C and FIG. ) Shows an enlarged cross-sectional view of the Y2 portion of FIG.
In the organic EL device of FIG. 1, a glass substrate (first substrate) 12 and a glass sealing cap (second substrate) 11 are bonded by an adhesive 14 to constitute an airtight container. A light emitting element (organic EL light emitting element) 13 including a first electrode (anode), a second electrode (cathode), and a light emitting layer (not shown) of an organic material between both electrodes is formed on the substrate 12. The light emitting element 13 is an electronic element when the organic EL device is an organic electronic device. The first electrode and the second electrode are connected to wiring (not shown) led out to the outside through the adhesive 14 in an airtight manner. The sealing cap 11 is formed with a convex portion 111 on the peripheral portion and a concave portion 112 on the inner side (center portion). The concave portion 113 and the convex portion 114 are provided between the convex portion 111 and the concave portion 112. It is formed. The concave part 113 is a concave part (separation concave part) that separates the convex part 111 and the concave part 112, and the convex part 114 forms a wall (separation wall) that separates the concave part 112 and the concave part 113. It is a convex part (separation convex part).

Here, the concave portion and the convex portion will be additionally described.
As will be described later, the concave portion is formed by processing a substrate such as glass by a sand blast method or the like, but the surface of the substrate before processing is used as a reference surface, and a portion lower than the reference surface is defined as a concave portion. A portion corresponding to the reference plane is called a convex portion. In addition, when a rib (partition) is formed by laminating an insulating material or the like on a substrate by a printing method or the like, the surface of the substrate is referred to as a reference surface, and a portion corresponding to the reference surface is referred to as a concave portion. The raised part is called a convex part. And when processing a substrate such as glass by the sandblast method, etc., if the entire surface of the substrate is processed so that the surface of the substrate after processing is lower than the surface of the substrate before processing, the substrate after processing The surface lower than the reference surface is referred to as a concave portion, and the portion corresponding to the reference surface is referred to as a convex portion. When a rib (partition) is formed by laminating an insulating material or the like on a substrate by a printing method or the like, when the insulating material or the like is laminated on the entire substrate, the reference surface is defined by using the surface raised by the lamination as a reference surface. The higher part is called a convex part, and the part corresponding to the reference plane is called a concave part.
Furthermore, the depth (the height of the bottom surface) of the plurality of concave portions may be different depending on the concave portions. The height of the plurality of convex portions may vary depending on the convex portion. As will be described later, the depth of the concave portion and the height of the convex portion are separated from the adhesive application area and the water capturing agent film forming area, and the water capturing agent solution in the water capturing agent film forming area is separated from the adhesive application area. It only has to be able to prevent spreading to.

  The glass substrate 12 and the glass sealing cap 11 are not limited to glass but may be plastic or metal. However, in the case of a metal, the side on which the light emitting element 13 is observed uses translucent glass or plastic. In the case where the organic EL device is a so-called end surface emission type in which light emission between the first electrode and the second electrode of the light emitting element 13 is observed through the adhesive 14 or the side member, the translucent adhesive or side surface is used. Use members.

  The convex portion 111 is a convex portion (adhesive application convex portion) that applies the adhesive (side member) 14 to the surface (substrate facing surface) facing the substrate 12, and the concave portion 112 is a water catching agent. It is the concave part (water trapping agent film formation concave part) which forms the water catching agent film | membrane (drying agent film | membrane) 21 which apply | coats a solution and absorbs water vapor | steam. The concave portion 113 is located between the convex portion 111 and the concave portion 112, and separates the convex portion 111 and the concave portion 112, and the water capturing agent solution in the concave portion 112 is formed on the substrate-facing surface of the convex portion 111 (adhesive application). The surface). That is, the concave portion 113 separates the adhesive application surface (adhesive application area) of the convex portion 111 and the concave portion 112 (water trapping film formation area) to which the water trapping agent solution is applied to form a water catching agent film. It prevents the water-receptive solution in the area from spreading to the adhesive application area.

  The convex portions 111 and 114 and the concave portions 112 and 113 of the sealing cap 11 are formed by a sandblast method. The convex portions 111 and 114 and the concave portion 113 have a frame shape, and the concave portion 112 has a dish shape. The convex and concave portions may be rectangular such as a rectangle, or non-square such as an ellipse or a circle. In addition to the sandblast method, an etching method, a molding method using a mold, or the like may be used. As will be described later, the water catching agent film 21 is formed by applying a water catching agent solution (water catching agent having a liquid form) in which a water catching agent is dissolved in a solvent to the inner surface of the concave portion 112 and drying by heating. .

The sealing cap 11 in FIG. 1 has a concave portion 113 disposed between the convex portion 111 and the concave portion 112 to separate the adhesive application area and the water capturing agent film forming area. Even if the water capturing agent solution spreads out of the concave portion 112 during the coating operation of the agent solution, it only spreads to the surface (substrate facing surface) of the convex portion 114 facing the substrate 12 and spreads to the adhesive application area. There is no.
Accordingly, even when the sealing cap 11 is tilted or vibrated during the application of the water catching agent solution, the water catching agent solution remains on the substrate facing surface of the convex portion 114 as shown in FIG. However, it does not spread to the substrate facing surface of the convex portion 111. Further, in order to increase the thickness of the water catching agent film 21, the water catching agent solution is similarly applied to the convex portion 114 even when the water catching agent solution is applied thick enough to substantially fill the concave portion 112 as shown in FIG. However, it does not spread to the substrate facing surface of the convex portion 111. In addition, when the amount of the water catching agent solution spread on the substrate facing surface of the convex portion 114 is large, a part of the water catching agent solution is accumulated in the concave portion 113, and thus reaches the substrate facing surface of the convex portion 111. It does not spread.

Here, with respect to the organic EL device shown in FIG. 1 and the organic EL device shown in FIG. 9, the state of occurrence of a non-light emitting portion (dark spot) of the light emitting element formed on the substrate will be described.
The organic EL device of FIG. 1 and the organic EL device of FIG. 9 are lit in an atmosphere of high temperature and high humidity (85 ° C./85% RH), and the light emitting element is observed with a microscope after 100 hours. A non-light emitting portion having a diameter of 10 μm was generated in the EL device, but no non-light emitting portion was found in the organic EL device of FIG. The non-light emitting part of the organic EL device in FIG. 9 has a water-absorbing film formed on a part of the adhesive application surface of the adhesive application convex part so that the adhesive strength between the substrate and the sealing cap is as described later. It is thought to have occurred as a result of the decrease.

Therefore, with reference to FIG. 4, the spreading state of the water capturing agent solution in the sealing cap 51 of FIG. 9 and the sealing cap 11 of FIG.
FIG. 4 is a photomicrograph after applying the water capturing agent solution to both sealing caps and heating and drying. 4A is a photomicrograph of the sealing cap of FIG. 9, and FIG. 4B is a photomicrograph of the sealing cap of FIG. 1, with a water catching agent in the concave portion 112 as shown in FIG. 1D. It is a microscope picture at the time of apply | coating a solution thickly.

  In the case of FIG. 4A, the water trapping solution applied to the concave part 512 extends to the adhesive application surface (adhesive application area) of the convex part 511. In this case, since the water capturing agent solution spreads over a part of the adhesive application surface, it becomes a ball shape or an island shape. When the water catcher solution spreads over the entire adhesive application surface, the water catcher solution is considered to form a continuous coating film without becoming a ball or island, but the water catcher solution is bonded. When spread over the entire surface where the agent is applied, it becomes difficult to bond the substrate and the sealing cap.

  In the case of FIG. 4B, the water capturing agent solution applied to the concave portion 112 spreads to the substrate facing surface of the convex portion 114, but does not spread to the concave portion 113. Therefore, it can be seen that the concave portion 113 prevents the water catching agent solution from spreading to the adhesive application area. That is, it can be seen that the concave portion 113 of the sealing cap 11 in FIG. 1 has a role of separating the adhesive application area and the water trapping agent film formation area. The water-absorbing agent solution spread on the surface of the convex portion 114 facing the substrate forms a continuous uniform coating film having a semicircular cross section (kamaboko shape). When this coating film is dried by heating, it becomes a water catching agent film, and has a water catching effect.

  In the photograph of FIG. 4B, the density of the peripheral portion (for example, Y4 portion) of the concave portion 112 is different from that of the central portion, but the actual water-absorbing agent solution is uniform over the entire concave portion 112. It is widespread. This difference in light and shade is caused by the difference in the light reflection characteristics on the surface of the concave portion 112 because the water capturing agent solution is transparent. The same applies to FIG.

The size of each part of the sealing cap 11 of the organic EL device of FIG. 1, the thickness of the adhesive 14, and the thickness of the light emitting element 13 are as follows.
The thickness of the sealing cap 11 is 0.7 mm, the concave portion 113 is 1.0 mm wide, the depth is 0.3 mm, the convex 114 is 0.2 mm wide, and the height is 0.3 mm. The depth of the concave portion 112 is 0.3 mm which is the same as that of the concave portion 113. The thickness of the adhesive 14 is about 10 μm, and the thickness of the light emitting element 13 is usually 1 μm or less.

  From the viewpoint of preventing the water capturing agent solution from spreading to the adhesive application area of the convex portion 111, the larger the concave portion 113, the better, but a larger dead space becomes larger. Further, if the width of the concave portion 113 is small (narrow), the water trapping solution may spread over the concave portion 113 to the adhesive application area of the convex portion 111, and processing becomes difficult. Therefore, the width of the concave portion 113 is preferably selected to be about 1.0 to 0.2 mm in consideration of dead space, prevention of spreading of the water capturing agent solution into the adhesive application area, ease of processing, and the like. The width of the convex portion 114 is 0.5 mm or less, preferably 0.2 mm or less. When the width of the convex portion 114 is reduced, the water trapping agent solution spreads uniformly on the surface of the convex portion 114 facing the substrate. Therefore, the continuous water trapping having a semicircular cross section (kamaboko shape) as described above. A drug film is formed.

FIG. 2 shows a procedure for manufacturing the organic EL device of FIG.
First, a glass substrate (a glass plate before processing) is processed by a sand blast method to form convex portions 111 and 114 and concave portions 112 and 113, and the sealing cap 11 is manufactured. That is, the sand plate method is used to cut the glass plate while leaving the portions where the convex portions 111 and 114 are to be formed, thereby forming the concave portions 112 and 113. The manufacturing method of the sealing cap 11 may be a sandblasting method, an etching method, or a molding method using a mold. Alternatively, a method of laminating an insulating material such as glass by a printing method may be used. After the sealing cap 11 is washed and dried, it is taken into the glove box 31 filled with dry nitrogen, and the water capturing agent solution 20 is dropped from the container 22 onto the concave portion 112 (FIG. 2 (a)). The dripped water capturing agent solution 20 spreads in the concave portion 112 to form a coating film 20 having a uniform thickness (FIG. 2B). In this state, when the water catching agent solution 20 is heated and dried (150 to 200 ° C.), the solvent of the water catching agent solution 20 is evaporated to form the water catching agent film 21 (FIG. 2C). Next, an adhesive (epoxy adhesive) 14 is applied to the upper surface (substrate-facing surface) of the convex portion 111 (FIG. 2D), the substrate 12 is overlaid on the adhesive 14, and ultraviolet rays UV is applied to the adhesive. (Sealing member) 14 is cured, and sealing cap 11 and substrate 12 are bonded (sealed) (FIG. 2E). Here, the adhesive 14 can be applied to the surface of the substrate 12 facing the convex portion 111 instead of being applied to the convex portion 111.

The glove box filled with dry nitrogen is not limited to the glove box, and may be in an atmosphere of dry inert gas such as dry nitrogen or argon. Moreover, although the ultraviolet curing epoxy adhesive was used for the adhesive 14, the adhesive etc. which consist of thermosetting resins can also be used.
Although the method of applying the water capturing agent solution 20 has been described with respect to a method of spreading (diffusing) naturally after dropping on the concave portion 112, the sealing cap 11 may be vibrated and diffused. Also, a coating method such as spin coating or roll coating may be used.

As the water catcher solution 20, a solution obtained by dissolving an organometallic compound or an organometallic complex compound in a hydrocarbon solvent is used. As the organometallic compound, for example, a compound represented by Chemical Formula 1 is used, and as the organometallic complex compound, for example, a compound represented by Chemical Formula 2 or Chemical Formula 3 is used. The water capturing agent solution 20 is a transparent solution, and the water capturing agent film 21 composed of the components of the chemical formulas 1 to 3 after being cured is also transparent. Therefore, the organic EL device in which the water capturing agent film is formed using the water capturing agent solution may be of a type in which the light emitting element 13 is observed through the water capturing agent film 21.
The solvent is a hydrocarbon, and an aromatic organic solvent such as toluene or xylene or an aliphatic organic solvent can also be used.

In Chemical Formula 1, R is an organic compound containing an alkyl group having 1 or more carbon atoms, an aryl group, a cycloalkyl group, a heterocyclic group, or an acyl group, M is a trivalent metal atom, and n is an integer of 1 or more.

In Chemical Formula 2, R is an organic compound containing an alkyl group having 1 or more carbon atoms, an aryl group, a cycloalkyl group, a heterocyclic group, or an acyl group, and M is a trivalent metal atom.

In Chemical Formula 3, R is an organic compound containing an alkyl group having 1 or more carbon atoms, an aryl group, a cycloalkyl group, a heterocyclic group, or an acyl group, and M is a tetravalent metal atom.

3A and 3B are a cross-sectional view and a plan view of a sealing cap of an organic EL device according to Example 2, FIG. 3A is a cross-sectional view, and FIG. 3B is Y3 in FIG. The top view of a direction is shown.
FIG. 3 shows an example in which two concave portions (separating concave portions) for separating the two areas are provided between the adhesive application area and the water capturing agent film forming area.
The sealing cap 11 is formed with convex portions 111, 114, 116 and concave portions 112, 113, 115. The convex portions 111 and 114 and the concave portions 112 and 113 are the same as those in FIG. 1, but the concave portion 115 and the convex portion 116 are additionally formed. The concave portion 115 is a concave portion (separating concave portion) that separates the adhesive application area and the water trapping agent film formation area as the concave portion 113, and the convex portion 116 separates the concave portion 113 and the concave portion 115. It is the convex part (separation convex part) which forms the separation wall.

Since the sealing cap 11 of FIG. 3 is provided with the concave portion 115 in addition to the concave portion 113, the effect of separating the adhesive application area and the water trapping agent film formation area is further enhanced. As for the separation concave portion, instead of providing the two concave portions 113 and 115, it is possible to provide one separation concave portion to widen the separation concave portion. Since the portion 116 is not provided, the effect of separating the adhesive application area and the water capturing agent film formation area is reduced.
The number of separation concave portions is not limited to one or two, and may be further increased.

FIG. 5 relates to Example 3 and is a modification of the organic EL device of FIG. 1, and actively uses the water capturing agent film 211 attached to or formed on the top of the convex portion 114 (the top of the separation wall). In this example, the water capturing effect is enhanced.
In the case of FIG. 5, the water capturing agent film 211 of the convex portion 114 is continuous in a strip shape or linear shape along the entire circumference of the top portion of the convex portion 114 (the top portion of the separation wall), or the convex portion. It is attached or formed on the entire top surface of 114. The substrate 12 is in close contact with the water capturing agent film 211 on the entire circumference or the entire surface of the top of the convex portion 114. Therefore, the area that houses the light emitting element 13 is sealed by the adhesive 14 and is also sealed by the water capturing agent film 211, and moisture that enters the housing area of the light emitting element 13 through the water capturing agent film 211 is Since it is captured by the water capturing agent film 211, the water capturing effect can be further enhanced.

FIG. 6 is related to Example 4 and is an example in which the convex portion of the adhesive application area is changed to a stepped portion in a modification of the organic EL device of FIG.
The sealing cap 11 of FIG. 6 has a stepped portion 117 for applying an adhesive on the outside of the convex portion 111. The stepped portion 117 is formed in a substantially L shape, and the adhesive 14 is applied thereto. That is, the stepped portion 117 is an adhesive application area. In the case of FIG. 6, the adhesive application area and the water capturing agent film forming area are separated by the concave portion 113, the convex portion 114 separates the concave portion 112 and the concave portion 113, and the convex portion 111 is the concave portion. 113 and the stepped portion 117 are separated. That is, the convex portion 111 is a separation convex portion that forms a separation wall that separates the concave portion 113 and the stepped portion 117.
In the case of FIG. 6, when the adhesive 14 is applied to the stepped portion 117, the adhesive 14 may adhere to the convex portion 111, so that the adhesive 14 can be easily applied. Moreover, since the adhesive agent 14 adheres to the bottom surface portion and the side surface portion (the side surface portion of the convex portion 111) of the stepped portion 117, the adhesive area of the adhesive agent 14 is increased, and adhesion (sealing) is ensured.

FIG. 7 relates to the fifth embodiment and is an example in which the concave portion 112 of the sealing cap 11 is formed in a frame shape as a modification of the organic EL device of FIG.
7A is a cross-sectional view, and FIG. 7B is a plan view of the sealing cap 11 in the Y1 direction of FIG. 7A.
The concave portion 112 of the sealing cap 11 is formed in a frame shape at a portion facing the outer portion of the light emitting element 13.
The sealing cap 11 in FIG. 7 is suitable for an organic EL device of a type in which the light emission of the light emitting element 13 is observed from the sealing cap 11 side because a water capturing agent film is not formed on the portion facing the light emitting element 13. Yes. When the light emission of the light emitting element 13 is observed from the sealing cap 11 side, if the water capturing agent film is formed on the portion of the sealing cap 11 facing the light emitting element 13, the light emission of the light emitting element 13 Since the film is observed through the film, if the water capturing agent film has uneven film thickness, the light transmittance and reflectance are partially different, and the display quality is deteriorated. However, since the sealing cap 11 of FIG. 7 does not form a water capturing agent film on the portion facing the light emitting element 13, the water capturing agent film does not affect the display quality.
In the embodiment of FIG. 7, as in the embodiment of FIG. 5, a water capturing agent film 211 is attached or formed on the entire circumference or the entire surface of the top of the convex portion 114, and the substrate 12 is formed on the convex portion 114. It is also possible to make it closely contact with the water catching agent film 211 on the entire circumference or the entire surface of the top. At that time, the water capturing agent film attached to the upper end (edge) opposite to the projecting portion 114 of the frame-shaped projecting portion 112 is used to enhance the water capturing effect in the same manner as the water capturing agent film 211. You can also.
Although each said Example demonstrated the organic EL device, this invention is used not only for an organic EL device but for an organic electronic device which dislikes water (water vapor), such as an organic solar cell, an organic TFT (thin film transistor), an organic memory, etc. can do.

It is sectional drawing and the top view of the organic EL device of 1st Example of this invention. It is a figure which shows the preparation procedures of the organic EL device of FIG. It is sectional drawing and the top view of the sealing cap of the organic EL device of 2nd Example of this invention. It is a microscope picture of the sealing cap of the organic EL device of FIG. 6 and the organic EL device of FIG. It is sectional drawing and the top view of the organic EL device of 3rd Example of this invention. It is sectional drawing and the top view of the organic EL device of 4th Example of this invention. It is sectional drawing and the top view of the organic EL device of 5th Example of this invention. It is sectional drawing and a top view of the organic electroluminescent device with which the conventional powdery water catching agent is mounted | worn. It is sectional drawing and the top view of the organic EL device which has formed the water catching agent film | membrane using the conventional water catching agent solution.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Sealing cap 12 Substrate 13 Light emitting element 14 Adhesives 111, 114, 116 Convex parts 112, 113, 115, 117 Concave part 20 Water catcher solution 21, 211 Water catcher film 22 Water catcher solution container 31 Nitrogen Glove box UV filled with UV

Claims (11)

  In an organic electronic device in which a substrate on which an electronic element is formed and a sealing cap on which a water-absorbing agent film is formed are bonded with an adhesive, an adhesive-coated convex portion having an adhesive-coated surface is formed on the sealing cap. A water catching agent film forming concave portion that forms a water catching agent film on the inner side of the adhesive applying convex portion, and between the adhesive applying convex portion and the water catching agent film forming concave portion. Forming a separation concave part separating the parts, forming a separation wall separating the two parts between the separation concave part and the water capturing agent film forming concave part, and the water capturing agent film forming concave part has a liquid form An organic electronic device, wherein a water catching agent film is applied and dried to form a water catching agent film.   In an organic electronic device in which a substrate on which an electronic element is formed and a sealing cap on which a water capturing agent film is formed are bonded with an adhesive, an adhesive coating step having an adhesive coating surface is formed on the sealing cap. A water catching agent film forming concave portion for forming a water catching agent film is formed inside the adhesive applying stepped portion, and both of the two are disposed between the adhesive applying stepped portion and the water catching agent film forming concave portion. Forming a separation concave part that separates the parts, forming a separation wall separating the two parts between the separation concave part and the water catching film forming concave part, and between the separation concave part and the adhesive application step part A separating wall that separates the two parts is formed, and a water catching agent film forming concave portion is coated with a water catching agent having a liquid form and dried to form a water catching agent membrane. Organic electronic devices.   The organic electronic device according to claim 1, wherein the electronic element is a light emitting element, and the organic electronic device is an organic EL device.   3. The organic electronic device according to claim 1, wherein a water capturing agent film is formed on a top portion of a separation wall that separates both the separating concave portion and the water capturing agent film forming concave portion. An organic electronic device characterized by that. 5. The organic electronic device according to claim 4, wherein the water capturing agent film formed on the top of the separation wall is formed along the entire circumference of the top of the separation wall, and is in close contact with the substrate on which the electronic element is formed. An organic electronic device characterized by being.   The organic electronic device according to claim 1 or 2, wherein a plurality of the separation concave portions are formed. Adhesive application convex part having an adhesive application surface on the substrate, water capturing agent film forming concave part forming a water capturing agent film inside the adhesive application convex part, adhesive application convex part and water catching film Forming a sealing cap by forming a separating concave part separating the two parts between the forming concave parts, and a separating wall separating the both parts between the separating concave part and the water capturing agent film forming concave part,
Applying a water capturing agent having a liquid form to the water capturing agent film forming concave portion, and drying to form a water capturing agent film,
An adhesive is applied between the adhesive-applied surface of the adhesive-applied convex portion of the sealing cap and the substrate on which the electronic element is formed, and the adhesive is cured to form the electronic element. A method of manufacturing an organic electronic device, comprising bonding a substrate and the sealing cap. Adhesive-coated stepped portion having an adhesive-coated surface on the substrate, a water-collecting film-forming concave portion that forms a water-collecting agent film inside the adhesive-coated stepped portion, an adhesive-coated stepped portion and a water-collecting agent film Separation concave part separating the two parts between the forming concave parts, separation wall separating the two parts between the separation concave part and the water capturing agent film forming concave part, and the separation concave part and the adhesive application stepped part Forming a separation wall that separates the two parts during the production of the sealing cap,
Applying a water capturing agent having a liquid form to the water capturing agent film forming concave portion, and drying to form a water capturing agent film,
A substrate on which the electronic device is formed by applying an adhesive between the adhesive-coated surface of the adhesive coating step of the sealing cap and the substrate on which the electronic device is formed, and curing the adhesive. A method for producing an organic electronic device, comprising: adhering a sealing cap to the sealing cap.   9. The organic electronic device manufacturing method according to claim 7, wherein the electronic element is a light emitting element and the organic electronic device is an organic EL device.   In an organic electronic device in which a substrate on which an electronic element is formed and a sealing cap on which a water capturing agent film is formed are bonded with an adhesive, an adhesive application area is formed on the sealing cap, and an inner side of the adhesive application area A water catching agent film forming area for forming a water catching agent film is formed, and a separation recessed portion for separating both areas is formed between the adhesive application area and the water catching agent film forming area. And a separating wall that separates the separating concave portion and the water capturing agent film forming area between the water capturing agent film forming area, and a water capturing agent having a liquid form is applied to the water capturing agent film forming area. An organic electronic device characterized by being dried to form a water catching agent film. Adhesive application area on the substrate, water trapping film formation area for forming the water trapping film inside the adhesive coating area, separation concave shape that separates both areas between the adhesive coating area and the water trapping film formation area Forming a separation cap that separates the separation concave portion and the water capturing agent film forming area between the portion, and the separation concave portion and the water capturing agent film forming area,
Applying a water capturing agent having a liquid form to the water capturing agent film forming area, drying to form a water capturing agent film,
Applying an adhesive between the adhesive application surface of the adhesive application area of the sealing cap and the substrate on which the electronic element is formed, and curing the adhesive to form the electronic element; and An organic electronic device manufacturing method, comprising: bonding the sealing cap.