TW200304105A - Light emitting display element, organic EL display element and method for manufacturing the same - Google Patents

Abstract

The invention provides a light emitting display element, organic EL display element and method for manufacturing the same. The object is to reduce the electrical impedance on the connection part of the electrode of light emitting device and lead electrode for implementing an excellent signal supply. An organic EL device is formed by sequentially laminating a first electrode 2, an organic layer 3 and a second electrode 4 on a transparent substrate 1. A connection part S of a metal electrode 4L for forming the second electrode 4 and a metal lead electrode layer 6 is formed in a package device 8, thereby forming a molten connection part 9a by illuminating the connection part S with a laser beam.

Description

200304105 Description of the invention (1) [Technical field to which the invention belongs 2 The present invention relates to a light-emitting display of a lead-out electrode for a light-emitting display signal = an organic electrode display device connected to the upper electrode to supply one of the display devices, Become the light emission method. Equipment, and the manufacture of these devices. Nine displays. [Previous technology] In recent years, manufacturers have developed a variety of spontaneous basic structures. The light-emitting elements can be lit or light-emitting display devices. The light-emitting element is I, which uses the element jj ί that uses the discharge space as a division. These light-emitting displays (and display panels) are used as a starting point to set the P D ρ of the light-emitting elements.

Flu〇reSCenc J cites VFE (Vac (electric (electroluminescence), led (l · Display), mm ’

Diode) a ^ FED1 (Jht Emitti: EL on Display), etc. E mig is a low-voltage light-emitting display device such as high-fidelity 11 φ s 1 can be obtained with high color purity ;: light-emitting and material; 2 specialized display devices are therefore note: Department-a kind of super Thinning the light-weight organic EL element of this type is composed of a cathode of ± King Wang Shan pressure. A pair of electricity = positive voltage anode and layer induced electron-hole J f electricity '' and H due to J Recombination of layer j produces a luminescent person. The 4 π 5 Hai organic line uses the 200304105 V. Description of the Invention (2) The figure illustrates such an organic EL display device composed of organic EL elements. The organic EL display device is a light emitting device composed of a first electrode (anode) composed of a transparent electrode such as IT0, and a light emitting material composed of a light emitting material such as A 1 Q 3, which is sequentially laminated on one side of the transparent substrate 1. An article composed of an organic layer 3 of a functional layer and an organic EL element composed of a second electrode (cathode) 4 composed of a metal electrode such as A1, and the first electrode 2 and the second electrode 4 of the organic EL element The upper part is formed with lead-out electrodes 5A and 5B for supplying a display signal. Here, the lead-out electrode 5 A on the side of the first electrode 2 is formed on the transparent electrode layer 2 L when the first electrode 2 is formed, and a metal lead-out electrode layer 6 for reducing wiring resistance is formed by the lead-out electrode 5 A and the first electrode 2. The manner in which ρΘ of the two electrodes 4 forms the insulating film 7 A achieves the purpose of preventing short circuits. In addition, the lead-out electrode 5 B on the second electrode side forms a metal lead-out electrode layer 6 on the patterned transparent electrode layer 2 L, and a metal electrode layer 4 L connected to the second electrode 4 is formed thereon. An insulating film 7 B is formed between the lead-out electrode 5 B and the first electrode 2 to achieve the purpose of preventing a short circuit. In addition, the organic EL element is significantly deteriorated when exposed to outside air. Therefore, the sealing element 8 is provided to seal the vicinity of the light-emitting area L of the organic EL element in an airtight manner. In the manufacturing process of such an organic EL display device, first, a transparent electrode layer 2 L is formed on a transparent substrate 1, and then the pattern is converted into a pattern necessary for display to form a first electrode 2. The layer L forms the base of the extraction electrodes 5A, 5B. Next, a metal extraction electrode layer 6 made of Cr or the like is formed on the transparent electrode layer 2L, and then patterned to form extraction electrodes 5A, 5B. After that, open the glowing area

Page 6 200304105 V. Description of the invention (3) L After forming the insulating films 7 A and 7 B, an organic layer 3 is formed on the exposed surface of the first electrode 2. Because of the organic layer 3 and the lead-out electrode 5 A metal electrode layer 4L is formed on the metal extraction electrode layer 6 of B, and a second electrode 4 is formed on the organic layer 3. Thereafter, the sealing member 8 is covered thereon in such a manner as to cover the light-emitting area L to perform a sealing process. The lead-out electrode 5 B of the second electrode 4 of this conventional example exposes the metal electrode layer 4 L composed of A 1 and the like to the outside of the sealing element 8, and the exposed metal electrode layer 4L and the I The transparent electrode layer 2 L formed by Ding et al. Is provided with a structure in which a metal extraction electrode layer 6 is interposed. As a reason for these structures, it is because of the transparent structure formed by IT0, etc. | When the metal electrode layer 4 L with A 1 or the like is directly contacted on the electrode layer 2 L, the metal electrode layer 4 L is likely to be corroded, and the aforementioned lead-out electrode The structure of 5 B is because the surface of the metal electrode layer 4 L is exposed to the outside. Therefore, the exposed portion of the metal electrode layer 4 L is easily deteriorated due to the influence of moisture and the like, and there is a problem that the power supply to the second electrode 4 will cause obstacles. problem. In addition, when the metal electrode layer 4L forming the second electrode 4 is formed on the lead-out electrode 5 B, the portions functioning as the second electrode and the parts functioning as the lead-out electrode are formed in different patterns, and thus each of them is formed. The masks for different patterns need to have two pieces, and the processes for forming different patterns also become complicated, so there are other problems such as increasing costs. In order to cope with other conventional examples of the foregoing subject, for example, the structure shown in 5 ΒΙφ may be adopted (where the same parts as the previous conventional examples are marked with the same symbols and repeated explanations of parts are omitted). In this conventional example, the second electrode 4 is formed only on the organic layer 3 and is a metal superposed on the lead-out electrode 5 Β.

Page 7 200304105 V. Description of the invention The overall pattern of the lead-out electrode and the electrode layer 6 of the lead-out electrode 6 is L-shaped. However, the combination of the two is because there is no way to draw it in the hot place. Not only is it limited, but it will also be generated. [Invention of this invention has a supply terminal connection and this manufacturing method (4) Layer 6 is contained in B Tie into structure. Known work || It can be advantageous, so the second method and electrode 5 are used for sealing; ^ The contact resistance is here. Here, there is the same content of luminescence. The contiguous part s on the part is sealed in the sealing element 8 so that it is only contained in the transparent electrode layer 2b. The metal electrode layer 4 is formed by a single photomask. However, since the second electrode will be formed, no electrode degradation will occur. And the metal electrode layer 4 is formed on the production electrode 4 and the lead-out electrode 5 B through a small contact area B. Therefore, the surface resistance of the lead-out electrode 5 B is sufficiently reduced. Although the organic EL display is exemplified by the problems of electrodes and lead-out electrodes of a device including a light-emitting element as its element. The light-emitting element of the electrode proposed for solving the aforementioned problems is an organic E, which is one of the display devices for the lead-out electrode of the signal. The aforementioned electrode and the lead-out electrode are airtight. That is, a metal bow is formed on it as a second electrical sequence. Therefore, a heterogeneous connection part S is used in the metal electrode of the electrode 4 in the power supply barrier. Before L, the surface also generates secondary oxides, which leads to the cost of the electrode 4. The feeling of the layer 4 metal is explained by using a film, but it is connected with other light-emitting display skirts. Therefore, its purpose is to make the above-mentioned light-emitting display device with a light-emitting display. Electrical properties of the device and its successor

200304105 V. Description of the invention (5) A good signal supplier with reduced impedance. In order to solve the aforementioned problems, the present invention has the following features. The invention related to item 1 of the scope of the patent application is a light-emitting display device comprising a first electrode formed on a transparent substrate, at least one light-emitting functional layer formed on the first electrode, and the aforementioned light-emitting layer. The light emitting element of the second electrode on the functional layer is composed of a lead electrode for supplying a display signal to the second electrode, and is characterized in that at least one of the second electrode and a part of the lead electrode is connected. The parts above are to be fusion-bonded. The invention related to the second item of the scope of the patent application is a light-emitting display device, which comprises a light-emitting functional layer provided with a first electrode formed on a transparent substrate, at least one layer formed on the Θ first electrode, and formed on the foregoing. The second electrode on the light-emitting functional layer is composed of a light-emitting element, and is connected with a lead-out electrode for supplying a display signal to the second electrode. It is characterized in that a sealing element covering the light-emitting element is provided and the entire second electrode is provided. The sealing element is used for sealing and forming a connection part connecting the second electrode and the lead-out electrode inside the sealing element, and melting and joining at least one part of the connection part. The inventor of the third scope of the patent application is based on the premise that the light-emitting display device of the first and second scope of the patent application is characterized in that the aforementioned lead-out electrode is made of a metal different from the second electrode. The inventor of item 4 of the patent application is based on the premise that the light-emitting display device of item 3 of the patent application is applied, characterized in that the aforementioned first electrode is a transparent electrode and the aforementioned second electrode is a metal electrode.

Page 9 200304105 V. Description of the invention (6) The inventor of item 5 of the patent application is based on the premise that the light-emitting display device of item 1 to 4 of the patent application is applied. It is implemented by irradiating laser light. The inventor applying for the patent scope item 6 is based on the premise of applying for the light emitting display devices of the patent scope scope items 1 to 5, which is characterized in that the aforementioned light emitting device is an organic EL device. The invention related to item 7 of the scope of patent application is an organic EL display device, which is composed of a first electrode composed of a transparent electrode formed on a transparent substrate and at least one light-emitting functional layer formed on the first electrode. The organic layer is composed of an organic EL element formed by a second electrode composed of a metal electrode layer formed on the organic layer, and an extraction electrode for supplying a display signal to the second electrode described above is characterized in that : The lead-out electrode is formed of a metal lead-out electrode layer formed on the transparent electrode layer insulated from the first electrode, and a portion connected to the second electrode is formed on a part of the metal lead-out electrode layer. And forming the second electrode and the spliced part in a sealing element to seal it into an airtight state, and forming at least one part of the spliced part to form a fusion joint by irradiating laser light Ministry. The applicant for a method for manufacturing an organic EL display device according to claim 8 of the patent scope includes the steps of forming a transparent electrode layer with a required pattern on a transparent substrate; and patterning the transparent electrode layer as described above. A step of forming a first electrode; a step of forming a metal extraction electrode layer on the transparent electrode layer or a transparent substrate; a step of forming an organic layer including at least one light-emitting functional layer on an exposed surface of the first electrode;

Page 10 200304105 V. Description of the invention (7) The step of forming a second electrode on the exposed surface of the organic layer and forming a continuous metal electrode layer on the metal lead-out electrode layer; at least the entirety of the metal electrode layer A sealing process for sealing a sealing element; a person who melts and joins the metal lead-out electrode layer and the metal electrode layer on the aforementioned continuous portion before or after the aforementioned sealing step by irradiating laser light. The present invention having the aforementioned features has the following effects. The light-emitting display device according to the scope of the patent application is because the connection part of the electrode for supplying the display signal and the lead-out electrode on the light-emitting element is fusion-bonded, so even if the contact state of the connection part has a problem when it is formed, because Since the fusion bonding is performed thereafter, the electrical connection condition of the connection portion can be realized, and the electrical impedance can be reduced. Thereby, it is possible to supply a signal of a good Θ to the light-emitting element. In addition, since a light-emitting display device applying for item 2 of the patent is provided with a sealing element covering the light-emitting element, the entire second electrode is sealed with the sealing element, so that the aforementioned connection portion is formed in the aforementioned sealing element. Prevents the degradation of the second electrode and its connection part, and can reduce the electrical impedance of the connection part. In addition, since the second electrode may be formed on the light-emitting function layer and a portion connected to the lead-out electrode, a single mask pattern may be formed, which simplifies the process and reduces the cost. In addition, those who apply for the light-emitting display devices of the third and fourth patent scopes have formed the lead-out electrode with a metal electrode different from the second electrode. Therefore, the lead-out electrode can be formed on the transparent electrode layer (the first electrode). Layer) and a second electrode layer as a buffer layer. Therefore, even when the second electrode is formed on the transparent electrode layer, the transparent electrode layer and the second electrode layer are used.

Page 11 200304105 V. Description of the invention (8) It is not in direct contact, so it can prevent direct corrosion and deterioration. Moreover, in the present invention, the second system is a connection between dissimilar metals, and therefore, even if it is a connection between dissimilar metals, a lead-out electrode layer is formed thereon when the transparent electrode layer is patterned, and the part which can be used is Therefore, the fusion bonding of the first electrode in the scope of patent application No. 5 can be performed to form a spot-shaped fusion bonding portion by irradiating laser light, so that the electrical impedance can be reliably reduced. In addition, even after the connection part is sealed with a sealing element, it can reach the connection part, so the connection part element can be made of a transparent element such as glass to irradiate the connection part without the need for a special process. laser. In other words, the field is formed by very different metals, and the electrical impedance of the spliced portion between the dissimilar metals and the spliced portion. For the organic EL element with the aforementioned characteristics issued in the scope of the patent application No. 6, the second electrode on the board is definitely connected to touch the spoiled electrode of the second electrode and the lead-out electrode. Fusion bonding, which can also reduce electrical impedance. By using this, a part of the layer can be reserved and the patterning process for forming a connection with the second electrode on the layer can be simplified.

For the light display device, the connection part is implemented. Therefore, even if the connection part of a small area is formed in a sealing element, the light emitting display device can be changed by irradiating laser light through a transparent substrate. The manufacturing part is melt-bonded. In the case of sealing, it is also possible to connect the lead-out electrode to the second electrode via a sealing element. Since the laser light can be fused by irradiating laser light, it can be reliably reduced.

For light display devices, because it is applicable, it can be formed indirectly on the transparent-based lead-out electrode and low impedance can be achieved.

Page 12 200304105 V. Explanation of Invention (9). In addition, those who seal the second electrode and the contiguous parts with a sealing element will not deteriorate the electrodes, can reliably supply power to the second electrode, and can block the light-emitting functional layer of the organic EL from the outside. The purpose of extending the life of the light-emitting display device. The organic EL display devices with the scope of patent applications No. 7 and No. 8 and the method of manufacturing the organic EL display devices are based on the structure of the metal lead-out electrode layer formed on the transparent electrode layer formed on the transparent substrate to connect the second electrode. In addition to a part of the transparent electrode layer, a metal lead-out electrode layer can also be formed, so the patterning process of the transparent electrode layer can be simplified. In addition, since the second electrode composed of the metal electrode layer forms a contiguous portion on the metal lead-out electrode layer, there is no concern that the electrode electrode will be corroded due to the direct contact between the metal electrode layer and the transparent electrode layer. In addition, since the metal electrode layer is formed in the sealing element and is hermetically sealed, the metal electrode layer can be surely supplied with power to the second electrode because the metal electrode layer is hermetically sealed. In addition, the metal electrode layer may be formed on the organic layer on which the second electrode is formed and a portion of the metal lead-out electrode layer. Therefore, it is sufficient to form a single photomask pattern for forming the second electrode. The simplification of the forming process can reduce costs. In addition, since the metal electrode layer and the metal lead-out electrode layer of the dissimilar metal are connected to the continuation portion, the fusion portion is formed by irradiating laser light on the continuation portion. Therefore, even when there is continuity or formation between dissimilar metals, The problem of tightness can also be achieved with a low electrical impedance connection. In addition, since the fusion bonding process performed by irradiating laser light with φ is because the laser light is irradiated to the connection part through a transparent substrate or a transparent sealing element, it can be implemented after the sealing process of the sealing element, so Must change organic EL display device

Page 13 200304105 V. The description of the invention (ίο) in the middle of the manufacturing process to implement the necessary processing. [Embodiment] The following describes the implementation mode of the present invention with reference to the drawings (the same parts as those in the conventional technology are marked with the same symbols and a part of the explanation is omitted). In the following implementations, an organic EL display device is used as an example for description. However, the present invention can also be applied to other types of light-emitting display devices having the same structure as an electrode on a light-emitting element and a lead-out electrode. FIG. 1 is an explanatory diagram of an organic EL display device according to an embodiment of the present invention. The organic EL display device is a first electrode (anode) composed of a transparent electrode layer L such as IT0, which is laminated on a single side of a transparent substrate 1 composed of glass, etc. in sequence. The organic EL element composed of at least one light-emitting functional layer made of a material including at least one organic layer 3 and a second electrode (cathode) 4 composed of a metal electrode layer such as A 1 is the first organic EL element. The electrodes 2 and the second electrode 4 are formed with lead electrodes 5 A and 5 B for supplying a display signal. Here, the lead-out electrode 5 A on the side of the first electrode 2 is a metal lead-out electrode layer 6 as a barrier layer formed on the transparent electrode layer 2 L when the first electrode 2 is formed. Forming an insulating film 7 between the electrodes 4 A can achieve the purpose of preventing a short circuit, and the lead-out electrode 5 B on the second electrode side is formed on a part of the patterned transparent electrode layer 2 L as a barrier layer The metal lead-out electrode layer 6 is formed with an insulating film 7 B between the lead-out electrode 5 B and the first electrode 2 to prevent short circuit. The material of the metal lead-out electrode layer 6 is made of gold that forms the second electrode 4

Page 14 200304105 V. Description of the invention (11) The metal electrode layer 4 L or the transparent electrode layer 2 L is a metal material with different conductivity. Materials such as C r can be used. Alternatively, a sealing element 8 made of glass is sealed, and a contiguous portion S of the metal lead-out electrode layer 6 and the metal electrode layer 4 L is formed in the sealing element 8. In addition, the continuation part S is irradiated with the laser light L a through the transparent substrate 1 to form at least one spot-shaped fusion bonding portion 9 a or a plurality of locations as required. When the sealing element 8 is formed of a transparent element such as glass, the fusion bonding portion 9a may be formed by irradiating the laser light La 'through the sealing element 8. According to such an implementation type of organic EL display device, since the spliced portion S of the metal lead-out electrode layer 6 and the metal electrode layer 4 L of the dissimilar metal is locally heated and fused by the emitted light, the spliced portion S can be reduced. Electrical impedance. In addition, since the entire metal electrode layer 4 L including the splicing portion S is sealed by the sealing element 8, the metal electrode layer 4 L forming the second electrode 4 is not exposed to thermal energy and moisture and does not deteriorate. This makes it possible to implement a good power supply to the second electrode. The manufacturing method of the organic EL display device in this embodiment is described below. As a first step, a transparent electrode layer 2 L is formed on a transparent substrate 1 and patterning processing required for display is performed to form a first electrode 2. At this time, the patterning is limited to a minimum, and the patterning process can be simplified by keeping the transparent electrode layer 2 L as the base of the lead-out electrodes 5 A and 5 B. In the next step, a metal extraction electrode layer 6 is formed on the extraction electrodes 5A and 5B, and then the light-emitting area L is covered, and if necessary,

Page 15 200304105 V. Description of the invention (12) The insulating films 7 A and 7 B are formed in the field. Next, an organic layer 3 is formed on the exposed surface of the first electrode 2 by evaporation or the like, and a metal electrode layer 4 as a second electrode 4 is formed on the organic layer 3 and a connection portion S of the metal extraction electrode layer 6. L. Further, after the sealing step of providing the sealing element 8 covering the entire metal electrode layer 4L, a fusion-bonded portion 9a formed by irradiation with laser light La or La 'is processed to form. The light source used in this laser light irradiation can obtain a desired output laser such as a YAG laser. The output light is collected by the optical system into a point shape, and the transparent substrate 1 or the transparent sealing element 8 is interposed. Irradiate to the subsequent part. In accordance with this manufacturing method, when the transparent electrode layer 2 L is retained as the base of the lead-out electrode 5 B, the intermediary system of the metal lead-out electrode 6 does not make the transparent electrode layer 2 L and the second electrode 4Direct contact does not cause electrode corrosion. In addition, since the formation of the fusion-bonded portion 9a by laser light irradiation is performed after the sealing process is completed, it is not necessary to change a series of manufacturing processes of the organic EL display device. FIG. 2 is an explanatory diagram showing another embodiment of the present invention. The same parts as those in the previous embodiment are marked with the same symbols and repeated descriptions of the parts are omitted. In this embodiment, the fusion-bonding portion 9 b formed on the continuation portion S is formed into a spot-shaped hole that is illuminated by laser light. Thereby, the fusion-bonded portion of the metal lead-out electrode layer 6 and the metal electrode φ layer 4 L can be formed on the inner surface of the dot-shaped hole, so that the same effect as that of the aforementioned embodiment can be achieved. The manufacturing method is carried out in the same steps as in the aforementioned embodiment.

Page 16 200304105 V. Description of the invention (13) Figure 3 is an explanatory diagram of other embodiments of the present invention. Among them, the same parts as those of the aforementioned implementation are marked with the same symbols and repeated explanations of the parts are omitted. In this embodiment, when the transparent electrode layer 2 L is patterned, the base layer of the lead-out electrode 5 B is removed. Thereby, the lead-out electrode 5 B on the side of the second electrode 4 is formed by a metal lead-out electrode layer 6 made of Cr or the like, and the metal electrode forming the second electrode 4 is connected to the continuous portion S in the sealing element 8. Layer 4 L continues. In the implementation mode, the same effect as that of the foregoing implementation mode can be achieved by forming the fusion bonding portion 9b on the connection portion S of the sealing member 8. In addition, the manufacturing method of this embodiment mode is implemented by the same process as the previous embodiment mode except that the transparent electrode layer 2 L is patterned. In order to make the content of the invention easier to understand in the aforementioned first to fifth figures, a light-emitting display device composed of a single light-emitting field L is disclosed, but the light-emitting display device of the present invention is not limited to this form. It is also possible to use the light emitting area L as a light emitting display device arranged in a matrix of a plurality of dots. Since the present invention has the structure as described above, a light-emitting display device constituted by a light-emitting element provided with an electrode for supplying a display signal, and a lead-out electrode capable of supplying a display signal to the electrode, and such a light-emitting display can be provided. In the organic EL display device, which is one of the devices, and the manufacturing method thereof, the electrical impedance on the connection portion between the electrode and the lead-out electrode is reduced to implement a good signal supply of φ.

Page 17 200304105 Schematic description [Schematic description]

The first diagram is an explanatory diagram of an organic EL display device related to an implementation form of the present invention. The second diagram is an explanatory diagram of another implementation form of the present invention. The second diagram is an explanatory diagram of another implementation form of the present invention. The fourth figure is a description of a conventional organic EL display device. The fifth figure is a description of a conventional organic EL display device. [Element Representative Symbols] Transparent substrate 1 First electrode 2 Organic layer 3 Chapter --- Electrode 4 · Lead-out electrode 5 A 5 B Metal lead-out electrode layer 6 Insulating film 7 A 7 B Sealing element 8 Fusible joint 9 a, 9 b Light-emitting area L Continuation part S

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Claims (1)

200304105 VI. Scope of patent application 1. A light-emitting display device comprising a first electrode formed on a transparent substrate, at least one light-emitting functional layer formed on the first electrode, and the aforementioned light-emitting functional layer The second electrode is composed of a light-emitting element, and is connected with an extraction electrode for supplying a display signal to the foregoing second electrode. It is characterized in that at least one of the connection portion between the foregoing second electrode and the extraction electrode is connected. The parts are to be fusion-bonded. 2. A light-emitting display device comprising a first electrode formed on a transparent substrate, at least one light-emitting function layer formed on the first electrode, and a second electrode formed on the light-emitting function layer. The light emitting element is composed of a person who supplies a bow k output electrode to the second electrode, and is characterized in that a sealing Θ member covering the light emitting element is provided, and the entire second electrode is sealed by the sealing element. At the same time, a connection portion connecting the second electrode and the lead-out electrode is formed inside the sealing element, and at least one portion of the connection portion is fusion-bonded. 3. The light-emitting display device according to item 1 or item 2 of the patent application, characterized in that the lead-out electrode is made of a metal different from the second electrode. 4. The light-emitting display device according to item 3 of the application, wherein the first electrode is a transparent electrode and the second electrode is a metal electrode. @ 5. If the light-emitting display device of the first or second item of the patent application scope is characterized in that the fusion bonding of the aforementioned continuation part is performed by irradiating laser light. Page 19 200304105 6. Scope of Patent Application 6. For the light-emitting display device of the first or second item of patent scope, it is characterized in that the aforementioned light-emitting element is an organic EL device. 7. An organic EL display device comprising an organic layer composed of a first electrode composed of a transparent electrode formed on a transparent substrate, and at least one light-emitting functional layer formed on the first electrode, and an organic layer formed on The organic EL element formed by the second electrode formed by the metal electrode layer on the organic layer is further connected with a lead-out electrode for supplying a display signal to the second electrode, wherein the lead-out electrode is formed by The metal lead-out electrode layer on the transparent electrode layer insulated from the first electrode is formed on a part of the metal lead-out electrode layer to form a part continuous with the aforementioned ^ electrode and the second electrodes. The connection part is formed in a dense P element and hermetically sealed, and at least one part of the connection part is irradiated with laser light to form a fused joint. 8. A method of manufacturing an organic EL display device, comprising: a step of forming a transparent electrode layer of a desired pattern on a transparent substrate; a step of patterning the transparent electrode layer to form a first electrode; A step of forming a metal lead-out electrode layer on a transparent electrode layer or a transparent substrate; a step of forming an organic layer including at least one light-emitting functional layer on the exposed surface of the first electrode; forming a first layer on the exposed surface of the organic layer; Two electrodes and a metal electrode layer forming step forming a contiguous part on the aforementioned metal lead-out electrode layer; a sealing step of sealing at least the entirety of the aforementioned metal electrode layer with a dense H-sealing element; and before or after the aforementioned sealing step The metal extraction electrode layer and the metal electrode layer on the contiguous part are fusion-bonded by irradiating laser light. Page 20