TW506092B - Packaging method of organic EL device - Google Patents

Abstract

To have a longer lifetime for organic EL (electroluminescence) device, a better packaging method must be used to completely isolate the organic material layer and electrode layer material of the organic EL device from the external environment. Thin plastic plates is flexible to be applied in flexible device, a blocking layer having waterproof, anti-oxidation capability is formed by using this thin plastic plate, and an adhesion layer is formed by printing. A package can with a cave region is formed after pressing by mold having pattern formation function, so as to package the organic EL device such that the internal devices are prevented from contacting with the external environment, which can effectively increase the operating lifetime of the organic EL device.

Description

[Field of the Invention] In order to ensure that the organic light-emitting diode (OLED) elements are enclosed inside the container, the canning method is used to seal the external environment, and a seal developed to achieve two: The organic light emitting diode (0LED) element is closely bonded to the substrate and the packaging can of the organic EL thin film layer, which can completely develop the bonding technology developed. [Background of the Invention] There is a principle that an EL element layer is formed, and an organic EL hole transporter is transported into an organic hole. In the basic junction of the organic EL element, the cathode material layer rests on the layer and the layer, so that the light-emitting material is recombined into a plate, and the structure includes the anode near the anode and the anode near the IW electrode layer, and emits light. Layered components, such as glass or plastic substrates. The organic EL material layer is inserted between a cathode, an anode, and an organic EL electrode. The injection layer can effectively perform electric light emission by the injection layer. Generally, it is thin.

One of the cathode and the cathode has this phenomenon. An electric hole is formed on the side. An electric hole is formed on the side and an electron is formed in the light emitting material layer of the organic EL element.

Organic EL devices have self-luminous properties, so they also have high resolution and excellent impact resistance. Based on these special properties, organic EL devices are currently being researched and developed to form displays that can be used as graphic displays.

Page 4 V. Description of the invention (2) The form of day element (P i X e 1) used, the period sample. ^ Θ ^ ^ J will be used as the next generation display. There are other EL components to look for you. The sound and sound of the main body and the female body are low and the voltage is low, and the light is bright. ^ ^ ^ The relationship between Wang and Wang can also be changed by changing the fluorescent material that the organism can emit. _ Various luminous colors in the target area. When a material is used, the light-emitting layer will be greatly changed. For the crystal of the machine, it is called "the perfect seal in the black point EL element. In order to meet the requirements of the grid, the EL element has a low working level and the cathode reduces the element. "And water, oxidation" production "appearing part must be installed to increase the situation" so that in other external parts, as a function of the efficiency of organic materials and other environmentally-friendly organic materials. Therefore, as far as possible, the traditional organic EL element organic EL element environment affects the electrical materials, but is difficult to be oxidized. In addition, the environmental factors formed by organic materials are extremely important for the material layer and the cathode. In order to suppress the fate of organic EL elements with low water vapor content, the cathode and the cathode in the device are responsive. When the sub-injection is used, the fluorescent material sub-holes are sensitive, and the content of the separation point is only extremely encapsulated with the organic layer. The low working cathode material solid injection layer is very capacitive and grows, so if the short hair method should be Isolation of water, the formation and transportation of oxygen in the cathode function materials are easy to use. That is, organic materials have more stringent gas and oxygen metal in the absence of Guangshou, and the weight will be more expensive than packaging. In the packaging process, the material of the packaging can is not the same as that of the metal material. The material can be easily sealed: the production of the can requires a higher cost, and the shortcomings of the pit can be easily broken and oxidized. This one metal # Μ /, the flatness is poor, and the metal chair cans are filled on the smelting tools during the packaging process, not only

Adhesion to substrate * τ, Μ, nailed to metal material 506092 V. Description of the invention (3) Long time, and adhesive ^ The adhesiveness between the two is also poor. Another packaging can material is work-forming and fragile Disadvantages such as; 'In the ^ station breakdown material packaging cans are not easy to add, like metal packaging cans-like, + ^ j process, glass packaging cans were filled on the smelting tools. However, it takes a long time, so one by one, organic EL elements should be provided with packages different from the conventional ones, and there are various limitations. The organic EL element based on the method of packaging the elements of the present invention and the conventional technique of packaging cans. The invention of the organic 讥 component package surname ^. As shown in the first figure, an organic alpha element of the -m anode layer is formed on a transparent substrate u to form an organic thin film layer 13 and then an M is formed on the polar layer 12 to complete the naval element, and 』= Upper formation-the number of cathode layers, and then a packaging can 5 top shape: _ said 14 has a low working function = = elemental gas 17 ... seal ϊΐ 1 pre 6 waterproof 14 anti oxygen intrusion barrier Film 5a. [Objective of the Invention] In order to effectively improve the organic EL element only has a very short hair life system, and a packaging method with strict requirements ... more J two parties [package organic EL components, so a new way must be used to solve the current Difficulties encountered. The main purpose of the packaging method of the organic EL element of the present invention is to avoid

Page 6 506092 V. Description of the invention (4) Free organic EL element # | x ^ ^ ^ Niu * Road is in the atmospheric environment and can effectively isolate outside: ϊΐ: 响; * The second time of the invention-the purpose is to Extending the packaging of warship components. Another object of the present invention is to provide a simpler method to incorporate components to achieve higher packaging efficiency. The packaging server uses a long-lasting organic EL element, and a better layer material must be used to contact the outer layer of the organic material and the electrode in the organic EL element. The purpose of the invention is to provide an organic EL element. A method of coating includes: forming a transparent substrate on a thin plate, and forming the word 'mounting the thin plate as a package with an adhesive layer I' on the transparent substrate, and forming a package body with 埶 ί'Λ. The organic EL element forms a plurality of plastic packages that are thinner than the plastic package to form a cavity-containing area. A plurality of cavities are used as one side of a packaging can body joining step with the energy or UV-Cur, and the sealing step is provided, which provides a transparency. The substrate and the organic EL element; the step of plate and adhesive layer is to provide a plastic packaging sheet to form a plurality of adhesive layers; the step of encapsulating cans in the field is tied to the plastic sealing and packaging area 'and using the tool The plastic in the cavity area; and the one side of the packaging can, that is, one of the organic EL elements on the plastic sheet transparent substrate is connected to the side by 1 ng to dry and harden the adhesive layer to form the organic EL element inside the body and the outside. The active organic material is completely homogenized on a transparent substrate.

506092 V. Description of the invention (5) Thin film and an electrode material thin film layer of an electrode material layer n MW spoon formed on the organic layer, and the brush method is coated with thermosetting, pinch. Plated to print anti-tai, this, # -Mature plastic or customized-Curing and other bonding materials, which have the effect of preventing oxygen from isolating. This is a "m" 4 plate, and then the organic EL element is stamped or rolled into a can: 32: sound J: The shape is to avoid the component. The resulting package: layer, touch and destroy the full insulation board-so that the formed organic material and the external environment are completed [Detailed description of the embodiment of the present invention] The present invention discloses an organic element The seventh figure includes: A packaging method, such as the second figure to the transparent step, is to provide a transparent substrate, and form a plurality of organic EL elements in the organic el package structure on the second plate and its application. ^ As shown in the figure, it includes the following:-A π 'structure' is formed on the transparent substrate 21, wherein a hole injection layer 23 is formed on the package 22 〇 = layer 22, and the anode layer 2 3 3, an electron transport layer 234, electron injection = f 232, light emitting layer = The figure shows the transparent W board, electrical materials, and layer 2. The figure, in which the transparent substrate 21 has a careless formation-a plurality of organic EL elements 34% :; 3 °, and the substrate is on The process of sealing the organic EL element

In the installation process, a thin plate is installed during the installation process. The thin plate shown in the fourth figure shows the waterproof and anti-flexible properties. It is formed with a stamping plate 45. It can penetrate into the solid or heat of the adhesive layer. The dry, hard, low-temperature materials need to be filled with organic EL materials, so that the materials should be completely and effectively sealed in an inert gas, and the packaging cans used for sealing must not be in contact with the internal organic EL elements. The step of forming a plastic packaging sheet and an adhesive layer is to provide a plastic seal ^ to form a plurality of adhesive layers on the plastic packaging sheet; if two is one of the plastic seals used in the packaging structure of the present invention, two = one plastic On the encapsulating sheet 451, a barrier layer 45 2 having a " lice capacity is formed in advance. Due to the plastic packaging sheet with ^ $ HZ on the flexible element, screen printing or letterpress printing ^ ζ f, the shape of the packaging can is formed by rolling with a mold capable of making a pattern ^, so that: It can reach the waterproofing of metal or glass packaging cans as shown in the fifth figure. According to the present invention, a pattern is formed on the barrier layer 452 of the plastic packaging thin film of ㈣m screen printing or letterpress printing on a plurality of melamine plates 45. Patten) 46, glued together / made into a number of plastic glues, using heating and jealousy, to use heating. Because of the right-handed type, the glue can be quickly connected. There are organic materials used in EL components. The requirements are strict, so special attention should be paid to the use of ML /, § · hot temperature :: ,,] = plastic plastic material is called Cun ng method hard 7 there are-a kind of adhesive layer to change the temperature of components in the package and order Once the UV light is used to irradiate the component or the packaging material is broken. The amount of increase in the month "Take ju〇u ^ 2 V. Description of the invention (7) " '----- | r — The step of forming the pot containing the cavity area is tied to the plastic package -3 A plurality of cavity-shaped areas are formed on the board, and the plastic seal with the cavity-shaped areas is used: the thin plate is used as the packaging can. As shown in the sixth figure, it is a schematic diagram of the cavity-shaped areas. The plastic packaging sheet 45 is formed by punching a plurality of cavity regions 2 on the 2 2 layer 4 6 and the plastic packaging sheet 45 as a plurality of packaging cans 49. The itzit of the cavity is about 50 to 200 to 10, so that the internal organic EL element falls within the cavity-shaped area "to prevent the internal organic tritium element from contacting the pot 49. —The step of bonding the package is to connect one side of the packaging can, that is, one side of the plastic sheet f with an adhesive layer, to the two sides of the transparent substrate with the organic EL element ^ Joint shape = dry and harden the adhesive layer by thermal energy Form = limb and reach the organic EL element inside the package body completely isolated from the outside world. As shown in the third figure, it is a schematic diagram of the surface area of the plastic package sheet, in which the shape and size of the 48-shaped area 48 are matched with the plurality of fEL elements 34 shown in the third figure. And after being stamped or rolled, the registration mark 70 of the plastic packaging sheet ^ used for the packaging can corresponds to the registration mark 30 of the component substrate 21 第三 of the third figure, so that the cavity area pattern 48 on the adhesive layer 46 is formed. The organic element 34 is accurately bonded to the substrate 21. = A picture shows the organic EL element packaging structure of the present invention, which includes: _ "κτ _ ϋ a transparent substrate 11 and a plurality of organic 70 on the transparent substrate and forming an ITO anode layer 12 on the transparent substrate 11 An organic thin film layer 13 is formed on the anode layer 12, and then an organic thin film layer 13 is formed on the organic thin film layer ι3.

Page 10 V. Description of the invention (8) The cathode layer 1 4 and a plastic packaging sheet i 5 1 8 can be formed in the plastic package in advance, and the device and the packaging can-the transparent substrate 11-a package body, and The world is completely isolated. The sheet is waterproofed and the compound cavity-shaped area side is completed, that is, the sheet reaches the organic ELtg piece; the plastic package sheet 15 has: a plurality of adhesive layers 16 and the packaging cover is blocked from oxygen intrusion Thin film 15a; the plastic several adhesive layers 16 having a plurality of cavity-shaped areas 18 of a plastic packaging sheet as a packaging can; the plastic packaging sheet having one side of the adhesive layer 16 and one side of several organic EL elements Bonding to form a plurality of organic EL elements inside and outside the package. Therefore, the disclosed novelty of the present invention "the method of packaging organic EL elements" can indeed be used to achieve the desired purpose and effect, which is in line with the invention patent. Elements of step and industrial utilization. "Ming" is only a better implementation of the present invention. Any changes or modifications familiar with this technology should be included in the drawings and examples disclosed above 0 ^ 隹, not intended to limit the issue of π The spirit of the invention according to the present invention is covered by the following patent application patent 506092. Brief description of the drawings [Simplified description of the drawings] The first diagram is a specific schematic diagram of the cross-section organic EL element of the present invention. The second diagram is the first diagram. Schematic diagram of the layered body of the organic layer part of the cross-section organic EL element. The third diagram is a schematic diagram of a substrate having a plurality of 0LED elements. The fourth diagram is a plastic package sheet forming a barrier film that is waterproof and oxygen-proof. The fifth diagram is a schematic diagram of the structure of the plastic packaging sheet to form an adhesive layer pattern. The sixth diagram is the shape of the cavity area formed by stamping or rolling after the plastic package sheet is formed to form an adhesive layer pattern. The seventh diagram is plated. Schematic diagram of a plastic sheet that is waterproof and oxygen-proof and is intended to be used as a packaging can. [Illustration of drawing number] Transparent substrate 11

Page 12 506092 Type 3 simple description of anode layer 12 organic thin film layer 13 cathode layer 14 sealing can 15 barrier film 15a adhesive layer 16 inert gas 17 transparent substrate 21 anode layer 22 hole injection layer 231 hole transport layer 232 light emission Layer 23 3 Electron transport layer 234 Electron injection layer 235 Electrode material layer 24 Alignment mark on element substrate 30 Multiple organic EL elements on substrate 34 Plastic packaging sheet 45 Plastic packaging sheet 451 Barrier layer 452 Pattern of adhesive layer (Patten) 46 Cavity area 48 Encapsulation can 49 Registration mark on plastic encapsulation sheet 70

Page 13

Claims (1)

506092 _Case No. 901Q5255_Amendment of the month and year_ VI. Patent application scope 1. A method for packaging an organic electroluminescent device (organic EL device), including: a step of forming an organic EL device, A transparent substrate is provided, and a plurality of organic EL elements are formed on the transparent substrate. A step of forming a plastic packaging sheet and an adhesive layer is to provide a plastic packaging sheet, and a plurality of adhesive layers are formed on the plastic packaging sheet. A step of forming a canister with a cavity-shaped region, forming a plurality of cavity-shaped regions on the plastic packaging sheet, and using the plastic packaging sheet with the cavity-shaped region as a packaging can; and a package body joint The step is to join one side of the packaging can, that is, one side of the plastic sheet with an adhesive layer, to one side of the transparent substrate with an organic EL element, and dry and harden by means of thermal energy or ultraviolet curing. The adhesive layer forms a package, and the organic EL element inside the package is completely isolated from the outside. 2. The packaging method of the organic EL element according to item 1 of the scope of the patent application, wherein the surface of the plastic packaging sheet can be pre-formed with a barrier film that is resistant to water and oxygen intrusion. 3. The packaging method of the organic EL element according to item 1 of the scope of the patent application, wherein the material of the adhesive layer may be a thermoplastic, thermosetting or UV-curable epoxy (Epoxy) or acrylic (Acrylic), etc.状 材料。 Shaped material. 506092 _Case No. 90105255_Amendment of the month and year_ 6. Application for patent scope 4. The packaging method of organic EL element described in item 1 of the scope of patent application, wherein the adhesive layer is printed by a screen printing or a relief printing It can be formed by printing, and the shape of the area of the screen printing or letterpress printing on the plastic sheet can be a ring shape, such as the surrounding coating method, or it can also be coated on the entire surface of the element area. 5. The packaging method of the organic EL element according to item 1 of the scope of patent application, wherein the cavity-shaped area on the plastic sheet is formed on the plastic sheet by stamping or rolling. 6. The packaging method of the organic EL element according to item 1 of the scope of the patent application, wherein the number of the adhesive layers and the number of the cavity areas on the plastic sheet is equal to the number of the organic EL elements on the transparent substrate, and The formation position corresponds. 7. The packaging method of the organic EL element according to item 1 of the scope of the patent application, wherein when the adhesive layer and the cavity area are formed on the plastic sheet, after the alignment marks are aligned, the adhesive layer and the cavity shape are aligned. The area needs to be accurately positioned on the organic EL element on the transparent substrate. 8. The packaging method of the organic EL element according to item 5 of the scope of the patent application, wherein the rolling method is to first form a pattern on a roller, and then form the cavity region by rolling the roller. . 9. The packaging method of the organic EL element as described in item 5 of the scope of patent application, 506092 _Case No. 90105255_ Years and months Amendment_ VI. Scope of patent application Where the punching method is a flat die, the cavity area is formed by flat punching. 1 0. A packaging structure using an organic EL element formed by the method described in item 1 of the scope of patent application, comprising: a transparent substrate having a plurality of organic EL elements on the transparent substrate; A plastic packaging sheet with a plurality of adhesive layers on the plastic packaging sheet; the plastic packaging sheet having a plurality of cavity-shaped areas, and the plastic packaging sheet with the cavity-shaped areas as a packaging can; and the One side of the packaging can, that is, one side of the plastic packaging sheet with an adhesive layer and one side of the transparent substrate with a plurality of organic EL elements are joined to form a package and reach the plurality of organic EL elements inside the package. Completely isolated from the outside world. 1 1. The packaging structure of the organic EL element as described in item 10 of the scope of the patent application, wherein the surface of the plastic packaging sheet can be pre-formed with a barrier film that is resistant to water and oxygen. 12. The encapsulation structure of an organic EL device as described in item 10 of the scope of the patent application, wherein the material of the adhesive layer may be a thermoplastic, thermosetting or UV-curable epoxy resin or acrylic material such as acrylic. 1 3. Package junction of organic EL device as described in item 10 of the scope of patent application Page 16 506092 _Case No. 90105255_ Year Month Amendment _ 6. The scope of the patent application, wherein the adhesive layer is printed by a screen printing or a letterpress printing, and the screen printing or letterpress printing is on plastic The shape of the area on the sheet can be a ring shape, such as the way of surrounding coating, or it can also be coated on the entire surface of the element area. 14. The packaging structure of the organic EL element according to item 10 of the scope of patent application, wherein the cavity-shaped area on the plastic sheet is formed on the plastic sheet by stamping or rolling. 15. The packaging structure of the organic EL element as described in item 10 of the scope of patent application, wherein the number of the adhesive layers and the number of the cavity areas on the plastic sheet are equal to the number of the organic EL elements on the transparent substrate. And the position where it is formed corresponds. 16. The packaging structure of the organic EL element according to item 14 of the scope of patent application, wherein the rolling method is to first form a pattern on a roller, and then form the cavity by roller stamping. region. 17. The packaging structure of an organic EL element as described in item 14 of the scope of patent application, wherein the punching method is a flat die, and the cavity region is formed by flat punching.