TW518772B - Light-emitting device with drying film and manufacture method thereof - Google Patents

Abstract

This invention relates to a light-emitting device with drying film and manufacture method thereof. On a substrate, a lower portion electrode, an organic emitting layer and an opposed electrode are formed sequentially. The parts are placed into a work chamber which has a feeding tunnel. Barium, Magnesium or Calcium is made facing the opposed electrode by the feeding tunnel and there is an adequate amount of oxygen in the feeding tunnel. The oxygen reacts with Barium, Magnesium or Calcium to form drying film of barium oxide, magnesium oxide or calcium oxide naturally on the surface of the opposed electrode when Barium, Magnesium or Calcium is going to form on the surface of the opposed electrode. The drying film can absorb certain moisture existing in isolation sealing layer so that the moisture can not affect or damage the organic layer. Therefore, occurrence of dark spot can be inhibited and work reliability of light-emitting device can be ensured.

Description

518772 Fix

Case No. 901317fi3 V. Description of the invention (1) The present invention relates to a light-emitting element with a hygroscopic film and a method for manufacturing osmium, which mainly involves barium, money or calcium and other materials to be deposited on the electrode: 'Chemical action' to produce barium oxide, oxidized oxide, or fluorene, and other hygroscopic films, which are naturally formed on the surface of the counter electrode, thereby suppressing the generation of black spots and ensuring the operation of light-emitting elements ^ owanic electr () 1⑽ device (hereinafter referred to as organic EL element) due to its large viewing angle, low time, thin display thickness, low power consumption, simple process, and crashworthiness: no need for backlight and full color light source Therefore, it has attracted the attention and use of all parties in the new panel. Please refer to 帛 1 ® 'for a conventional organic electroluminescence cross section ^ mainly = a lower electrode is formed on a substrate u (tran = plating is formed and may include a hole injection layer (hole injection1w, electrofeeding = layer ( ho: e transp〇rt layer), organic layer (orgamc emitting layer or electron transport layer), organic layer 13, counter electrode (〇pp〇sed) 14 and isolation sealing cover 15. Since organic light Electron mines produced by electrodes 11 and 14 individually: the same & person should use two ^ ^ ^ ^ ^ ^ ^ to combine the electric or electric holes in the organic layer 1 3 to excite the stack narrative layer to shoot out The light source is inevitably a heat source in this process, and once this heat source is combined with the moisture and moisture existing in the isolating and sealing cover 15, oxygen dark spots will be formed on the surface of the organic layer 13. And here in the evening, I ’m struggling to divide the sounds of Du Xi ’s knees and privately, and it will affect the luminous quality such as the first strength and the first uniformity of 70 organic lumens, which will greatly reduce the use of organic EL elements. There is daddy master 518772-case number 9013ΠΜ_year month day 倏 正 __ 5. Description of the invention 2) In order to solve the defects caused by black dots, the industry must research and develop various structural improvements of organic EL elements, such as disclosed in Japanese Patent No. jp —a-3 6 3890 or jp-A — 5_1 1 4486 Liquid fluorinated carbon is stored in the isolation sealing cover 15 to effectively remove the heat source generated during light emission. Japanese Patent No. Jp_A_5 — 4l2 No. 81 discloses the existence of the presence in the isolation sealing cover 15 There are liquid dehydrating agents (synth etic zeolite) and other liquid dehydrating agents ("hydraulic") mixed into the liquid carbonization, and thereby neutralize and remove the moisture and moisture existing around the components. The above-disclosed patents although It has an effective reducing effect on the generation of black spots. However, the dehydrating agents such as fluorine carbide are used in liquid state, which has certain difficulties in the manufacturing process, which is not conducive to the integration of 1 (: and cost reduction). It is shown that j exists in the presence of qi, but it is because it is away from it. Although it absorbs it, it is sealed for the United States and China to have a moisture absorption into black. It should be wet and thin when it falls. It is a national patent with a good cover (the interior of the thin film at 17 points in the sea produces a patented type of light-emitting film fixture that receives force. The structure of the second organic EL element is No. 5, 882, 76 1 "〇rgani uses a hygroscopic film (Drying fi 1 ing case) 1 5 internal surface, and internal space 1 9 to absorb the inhibitory effect existing in the isolation sealing cover. It can solve the previously disclosed conventional element technology. There is still a vertical external force impact on the organic layer and the counter electrode, which may cause moisture absorption to directly collide with the counter electrode or, as shown in Figure 2 c EL element 1 m) 1 7 Fixing and counter electrode 1 Part of the disadvantages of the wet-wet technique in solid form 1 5 The following defects: Straight extension direction, when the film falls, the organic layer, not only

Page 6 V. Description of the invention (3) Damaged components will also reduce their service life: 2 · Hygroscopic film cannot be placed on the surface of the counter electrode: ^ ”When the film is to be formed on the surface of the counter electrode, a test is performed. Its working temperature is higher than 2000 ° C, female weight affects the working reliability of the organic layer and the production is good. 3. The method of using the cover of the isolation sealing cover to set the peripheral edge of the thin light-emitting element, not only the process It is a pity that the volume cannot be effectively reduced. Therefore, how to propose a novel solution to the above-mentioned various conventional light-emitting elements, which can straighten the surface of the hygroscopic film, not only will not affect or damage the work of the organic layer, effectively suppress the generation of black spots, and extend the creation of the invention. Focus.爰 is 1 力 force, the main purpose of Mao Ming is to provide a thirst-thirsty thinner '2, 2. Magnesium or calcium and other to-be-formed substances are to be formed in pairs, and then cooperate with oxygen, and since == this greatly reduces the control of 卩Shi Yue ..., it can be done in the opposite direction, and it can also effectively improve the product quality. It guarantees the components, the purpose is to provide a kind of energy that absorbs the natural formation and greatly reduces the process temperature. Not only can it solve the concerns of the dry environment, but also the f light emitting element, it can also confirm the efficacy. In order to suppress the generation of black spots and prolong the luminescence of X, one purpose of the present invention is to provide a product with L due to moisture absorption: the temperature is too high, according to which the rain temperature will be severe, and the film will be fixed to the The problem caused by the component is connected to the opposite electrical reliability, and it is also effective, that is, when the method of making the film is directed to the electrode surface, the thin film is hygroscopic under the condition of the light-emitting element's working wet film. The luminescence of the inner element of the outer light-emitting element using the wet film 518772

V. Description of the invention (4) The element is formed naturally on the surface of the counter electrode by using a hygroscopic film. The process can be simplified to reduce the cost, and the volume of the product can be greatly reduced. The structural features and the effect achieved have a further two-step understanding and understanding. I would like to refer to the preferred embodiment diagrams and detailed descriptions, as described below: Please refer to Figure 3 and Figure 4 for the invention. In a preferred embodiment, a schematic diagram of a process for forming a moisture-absorbing film and a cross-sectional view of a structure of a light-emitting element are shown. 'First, a part or all of a surface of a substrate is made of at least one transparent material (such as IT0, IZ. , Or other light-transmissive thin gold layer) made of the lower electrode 43 ′, and then formed at least one organic emission layer (organic emitting layer) of the organic layer 45 and the counter electrode 47. After that, the above-mentioned components are placed in a working room 31, and the to-be-formed substance 37 'such as an alkali metal, or an alkaline earth metal such as barium, M, and calcium is stored in the working room 31, and can be formed naturally by placing the relative location and angle. One of the feeding channels 375 faces the counter electrode 47. Gudang: The power supply 38 starts to supply electricity and causes a heating element 39 liters :: The working temperature in the chamber 31 to start the substance 37 to be sputtered j When the material is sprayed to the feed channel 375, one of the working rooms is exhausted = the supplier 35 will naturally form the 2 through the working room through the gas 3 5 5 to provide the appropriate amount of gas 355 to the feed channel 375, such as Oxygen. Rutong, 3 55 in barium, magnesium or calcium 37 before being formed on the counter electrode 47 will be combined with milk gas 35 to make it have the function of absorbing water and moisture. D = barium, magnesium oxide. Or calcium oxide and other hygroscopic film 49, and naturally shape the surface of the electrode 0, as shown in Figure 4. Fight against 518772

The materials of these moisture-absorbing films 49 and 9 are chemical abSorb when combined with moisture and moisture, so they will not be released again after absorption, so the drying life of the 45 edges of the organic layer can be ensured = = generated After ensuring the reliability of the light-emitting element and extending the lifetime, the exposed surface shape of the substrate 41, the lower electrode 43, the organic layer 45, the opposite °, and the wet film 49 is an isolation seal cover or isolation seal. That is, the light-emitting 7G component with the moisture-absorbing film 49 directly disposed on the surface of the opposite electrode can be completed, which can not only simplify the manufacturing process such as packaging, but also effectively reduce the volume of the component. In addition, some materials of the moisture-absorbing film 49 form a strong base compound after being combined with moisture and moisture, for example, calcium oxide meets water to form hydroxide I to protect the safety of other components. Therefore, the present invention can also be used in the isolation sealing cover. Or, an inert gas is provided in the isolation sealing layer 48, and the inert gas is used to ensure that other components are not damaged by strong alkali compounds. In addition, in general, the alkali metals used in the substance to be formed 37, such as sodium and potassium, are very active and are not easy to exist and control in a normal environment for a long time. Therefore, when the present invention intends to use chemicals such as sodium or potassium, etc. In the case of a substance, a commercially available alkali metal slide (AlkaU ^ S ^ Ser) can be used directly, for example, provided by the Italian company SAES Getters, which will stabilize the alkali metal chromate (Me2Cr04; Me in a two-state environment). It is an alkali metal compound ^) and a reducing agent (St 101R) is treated by heating reduction to obtain the required alkali metal substance and the second 37 and the moisture-absorbing film 49 required by the present invention. / Adult Shellfish

518772

V. Description of the invention (6) Moisture absorbing film 4 9 The finished product is directly vaporized or the bond is on the surface of the counter electrode 4, which means that barium, magnesium, or calcium, etc., which is to be formed, is first heat-treated, and is formed in $ When the surface of the counter electrode 4 7 is combined with oxygen 3 5 5, its working personnel will be greatly reduced. Its working temperature is only 4,000 to the left and right. According to the test, it will be formed directly from the finished product. It has a working temperature of 2000, and the working temperature is obviously reduced a lot, so it should be able to ensure that the light-emitting element is not damaged. Of course, the existence of oxygen 355 also exists a lot for the organic layer 45. Therefore, in addition to the appropriate amount of oxygen 355 supply in the working room 31, it is necessary to think that at least one isolation rib 3 can be provided within the working space 3 3 Adjacent contact pair, the electrode 47... In the process of forming a hygroscopic film 47: The probability that the oxygen fluoride 355 touches the organic layer 45. Bai Zheng ^ Li Although in the above embodiments, the light-emitting element is used as the narrative element, the manufacturing method of forming a hygroscopic film is not limited to the development of two parts of moisture or high temperature, which will damage the two parts. It can be applied to the technical method disclosed in the present invention.一 光 ΐ ϊ ΐ 制 ΐ ί t hair = there is a surface with a hygroscopic film, which is used to suppress the formation of the inside point 2 on the counter electrode user, which should be in line with China's progress and available industry It is undoubtedly necessary to submit the patent application requirements for invention patent application according to law. Ming Qijun Bureau granted quasi-patent as soon as possible

Page 10 518772 _Case No. 90131763_ Amendment _ V. Description of the Invention (7) The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Equal changes and modifications of the shape, structure, characteristics and spirit described in the scope of the patent application of the present invention shall all be included in the scope of the patent application of the present invention. Drawing number comparison description:

11 Substrate 12 Lower electrode 13 Organic layer 14 Counter electrode 15 Isolation seal cover 17 Moisture absorbing film 18 Seal 19 Internal gap 31 Working room 32 Intake channel 33 Isolation rib 35 Gas supply 355 Gas 37 Metal to be formed 375 Feed channel 38 Power supply 39 Heating element 41 Substrate 43 Lower electrode 45 Organic layer 47 Counter electrode 48 Isolation and sealing layer 49 Hygroscopic film

Page 11 518772 _Case No. 90131763_ Years and Months Revision _ Brief Description of the Drawings Figure 1: A cross-sectional view of the structure of a conventional organic electroluminescent device; Figure 2: A cross-section of the structure of another conventional organic electroluminescent device FIG. 3 is a schematic diagram of a manufacturing process of a preferred embodiment of the present invention when forming a moisture-absorbing film; and FIG. 4 is a cross-sectional view of a structure of a preferred embodiment of the present invention.

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Claims (1)

518772 ____ cable No. 90131763 said _ amended ______ VI. Scope of patent application 1 · A method for manufacturing a light-emitting device with a hygroscopic film, the main process steps include: sequentially forming a lower electrode on a substrate, A light emitting layer and a counter electrode; and a material to be formed facing the counter electrode with a feeding channel, and there is a proper amount of gas in the feeding channel, which gas can be formed on the surface of the counter electrode when the substance to be formed is formed. And then interact with the substance to be formed to generate a hygroscopic film, so that the hygroscopic film is naturally formed on the surface of the opposite electrode. 2 · The method for manufacturing a light-emitting device according to item 1 of the scope of the patent application, wherein the substance to be formed is one of selectable alkali metals, alkaline earth metals, and combinations thereof. 3. The method for manufacturing a light-emitting device according to item 1 of the scope of the patent application, wherein the substance to be formed is one of barium, ball, feed, and a combination thereof. " " 4 · The manufacturing method of the light-emitting element according to item 1 of the scope of patent application, wherein the gas system is oxygen. 5. The method for manufacturing a light-emitting device according to item 1 of the scope of patent application, wherein the moisture-absorbing film is selected from among barium oxide, magnesium oxide, calcium oxide, and a combination thereof. 6. The method for manufacturing a light-emitting element according to item i in the scope of the patent application, wherein the hygroscopic film is formed on the surface of the counter electrode by a working chamber, and an air inlet channel is provided in the working chamber to be connected to the feeding material. Channel, and thereby supplying the gas existing in a gas supplier to the feed channel Page 13 ^ 18772 MM 90131763 Amendment 7 8 The patent scope of the method for making light-emitting documents as described in item 6 of the patent application park, wherein the working room can be provided with at least one that can be adjacent to the surprise direction Isolation ribs on both sides of the electrode. As in the manufacturing method of the light-emitting element described in the patent application No. 1, wherein the substance to be formed enters the feeding channel by one of sputtering and evaporation. A light-emitting element with a moisture-absorbing film, the main structure of which includes a plate with at least a part of the surface, which is opposed to the surface of 10 11 12 with the shape of the object, such as the object made by the object. Please specialize in a department that asks for a special system, please prepare oxygen on the lower electrode of the substrate surface, and an organic layer and an organic layer electrode are horizontally arranged on the surface; To form a hygroscopic film, which causes the surface of the counter electrode to be absorbed. The light-emitting element described in the ninth aspect of the invention is an alkali metal, an alkaline earth metal, and a manufacturer thereof. $ The light-emitting element described in item 9 is: ,,,,,,,,,,,,,,,,,,,,,,,,, and, or Barium, Magnesium, Calcium, and a combination thereof can be selected. The light-emitting element described in item 9, and the surface of the lower electrode is opposite. The electrode surface wet film is naturally in which the composition to be shaped is among which the to be shaped < among them ~ where the gas Page 14 518772 _ Case No. 90131763_ ^ __a i ^ rSL __— 16. Application for patent scope 1 3 · The light-emitting element as described in item 9 of the patent application scope, wherein the hygroscopic film can be selected from barium oxide and magnesium oxide Formed by one of calcium oxide and its composition. 14 · The light-emitting element according to item 9 of the scope of the patent application may further include an isolation sealing layer provided on the surface of the substrate, the lower electrode, the organic layer, the counter electrode, and the moisture-absorbing film. 1 5 · A light-emitting element having a moisture-absorbing film, the main structure of which includes a substrate, at least one lower electrode formed on the surface of the substrate, and an organic layer on a part of the surface of the lower electrode, and the surface of the organic layer A pair of opposite electrodes is provided; and a moisture-absorbing film with a function of absorbing moisture and moisture is provided on the surface of the opposite electrode. 16 · The light-emitting device according to item 15 of the scope of patent application, wherein the hygroscopic film is selected from one of barium oxide, magnesium oxide, calcium oxide, and a combination thereof. 17 · The light-emitting element described in item 15 of the scope of patent application may further include an isolation sealing layer provided on the surface of the substrate, the lower electrode, the organic layer, the counter electrode, and the moisture-absorbing film. 1 8 · —A method for forming a hygroscopic film, which mainly faces a material to be formed with a feeding channel facing an intended element, and there is a proper amount of gas in the feeding channel. When the substance is to be formed on the surface of the element to be applied, it interacts with the substance to be formed to produce No. 15 I 518772 --- Case No. 90131763_ 生 I Name One amendment _____ Sixth, the scope of patent application A hygroscopic film, which causes the hygroscopic film to naturally form on the surface of the element to be treated. 19 · The manufacturing method as described in item 8 of the scope of the patent application, wherein the substance to be formed is one of selectable alkali metals, soil testing metals and combinations thereof. ^ 2 〇 The manufacturing method according to item 8 of the scope of the patent application, wherein the substance to be formed is one of a lock, money, contract, and a combination thereof. 2 1 · The manufacturing method as described in item 18 of the scope of patent application, wherein the gas is oxygen. 2 2 · The manufacturing method as described in item 8 of the patent application scope, wherein the hygroscopic film is selected from one of barium oxide, magnesium oxide, calcium oxide, and a combination thereof. 23 · The manufacturing method as described in item 18 of the scope of patent application, wherein the moisture-absorbing film is formed on the surface of the element to be activated by a working chamber, and an air inlet channel is provided in the working chamber and is not connected to the feeding material. Channel, and thereby the gas present in a gas supplier is provided in the feed channel. 24. The manufacturing method according to item 8 of the patent application scope, wherein the working room may further be provided with at least one isolation rib that can be adjacent to both sides of the element to be applied. 2 5 · The manufacturing method according to item 8 of the scope of the patent application, wherein the substance to be formed enters the feed channel by one of sputtering and evaporation. Page 16