JP2011233332A - Method for manufacturing organic electroluminescent lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing an organic electroluminescent lighting device in which dielectric breakdown of an organic light-emitting film due to static electricity is not easily generated.SOLUTION: The method includes: a first film formation process for forming a plurality of transparent electrodes films 2 which are mutually separately arranged and a conductive film 3 joined with the plurality of transparent electrode films 2 on the surface of one transparent substrate 1. In the first film forming process, the plurality of transparent electrode films 2 are respectively formed as an anode film 2a and a cathode terminal film 2b arranged separately from the anode film 2a, and the conductive film 3 is formed on the outermost peripheral parts of the arrangement areas of the plurality of transparent electrode films 2 and in between the plurality of transparent electrodes 2 to electrically connect the anode film 2a and the cathode terminal film 2b through the conductive film 3. The method also includes a second film formation process for forming an organic light-emitting film 4 on the surface of the anode film 2a; a third film formation process for forming a cathode film 5 continued from the surface of the organic light-emitting film 4 to the surface of the anode terminal film 2b; and a division process for dividing the transparent substrate 1 along each conductive film 3 after the third film formation process.

Description

  The present invention relates to a method for manufacturing an organic electroluminescence lighting device in which a plurality of lighting panels are manufactured using a single transparent substrate.

  An organic electroluminescence illumination device generally includes an illumination panel in which an organic light-emitting film is sandwiched between a transparent flat anode film and a flat cathode film and mounted on a transparent substrate such as a glass substrate. As a method for improving the productivity of the lighting panel, so-called multi-planar manufacturing, in which a plurality of lighting panels are manufactured from a single transparent substrate, is disclosed in, for example, Patent Document 1.

  In the manufacturing method disclosed in Patent Document 1, a conductive non-adhesive layer pattern is provided on a sealing substrate to which an adhesive is applied. The sealing substrate is attached to the transparent substrate so that the non-adhesive layer pattern is in contact with a part of each of the two cathodes adjacent to each other on the transparent substrate. As a result, all the cathodes are not covered with the adhesive at the time of sealing, so that the sealing substrate can be securely attached to the transparent substrate without obstructing the energization of the cathodes.

JP 2008-130212 A

  As described above, the lighting panel of the organic electroluminescence lighting device has a structure in which an organic light emitting film is sandwiched between a flat plate anode film and a flat plate cathode film, so that it is not only a light emitting diode but also a capacitor. . For this reason, there is a possibility that the organic light-emitting film breaks down due to static electricity generated during the manufacturing process. In the case where the lighting panel is manufactured by multi-chamfering, many lighting panels are manufactured at one time, so there is a concern that the yield may be reduced. On the other hand, in the manufacturing method disclosed in Patent Document 1, since only the electrode film (cathode) having the same polarity is electrically connected through the non-adhesive layer pattern, it is not possible to cope with the dielectric breakdown of the organic light emitting film.

  Accordingly, an object of the present invention is to provide a method for manufacturing an organic electroluminescence lighting device in which dielectric breakdown of an organic light emitting film is hardly caused by static electricity.

  In order to achieve the above object, a method of manufacturing an organic electroluminescence lighting device according to the present invention is formed by bonding a plurality of transparent electrode films disposed on a surface of a single transparent substrate to each other, and the plurality of transparent electrode films. Each of the plurality of transparent electrode films is formed as an anode film and a cathode terminal film disposed away from the anode film, The conductive film is formed between the outermost peripheral portion of the arrangement region of the plurality of transparent electrode films and the plurality of transparent electrode films, and the anode film and the cathode terminal film are electrically connected through the conductive film. A first film-forming step connected to the surface, a second film-forming step of forming an organic light-emitting film on the surface of the anode film, and a cathode film continuous from the surface of the organic light-emitting film to the surface of the cathode terminal film A third film forming step for forming a film, and after the third film forming step, before The one transparent substrate, having a dividing step for cutting along the conductive layer.

  According to the present invention, the anode film and the cathode terminal film are electrically connected via the conductive film in the first film forming step. In the third film forming step, the cathode film is electrically connected to the cathode terminal film. As a result, the anode film and the cathode film are electrically connected (short circuit state). Therefore, even if static electricity is generated in the processes after the third film forming process, it is difficult for charges to accumulate in the organic light emitting film. Therefore, the dielectric breakdown of the organic light emitting film is difficult to occur.

It is a flowchart which shows the manufacturing process of the organic electroluminescent illuminating device of this embodiment. It is a top view for demonstrating a 1st film-forming process. FIG. 3 is a cross-sectional view taken along a cutting line AA shown in FIG. 2. FIG. 3 is a cross-sectional view taken along a cutting line BB described in FIG. 2. It is a top view for demonstrating a 3rd film-forming process. FIG. 6 is a cross-sectional view taken along a cutting line CC shown in FIG. 5. FIG. 6 is a cross-sectional view taken along a cutting line DD shown in FIG. 5. It is a top view which shows the pattern of the division location of the electrically conductive film in a test | inspection process. It is a top view which shows the pattern of the division location of the electrically conductive film in a test | inspection process. It is a top view which shows the pattern of the division location of the electrically conductive film in a test | inspection process. It is a top view which shows the pattern of the division location of the electrically conductive film in a test | inspection process. It is a top view which shows the pattern of the division location of the electrically conductive film in a test | inspection process. It is a top view which shows the pattern of the division location of the electrically conductive film in a test | inspection process. It is a top view which shows other embodiment of the arrangement pattern of an electrically conductive film.

  An embodiment of a method for producing an organic electroluminescence lighting device of the present invention will be described. FIG. 1 is a flowchart showing a manufacturing process of the organic electroluminescence lighting device of the present embodiment. Hereafter, each process is demonstrated according to the flowchart of FIG.

  First, the first film forming step (step S1) will be described. FIG. 2 is a plan view for explaining the first film forming step. 3 is a cross-sectional view taken along a cutting line AA shown in FIG. 2, and FIG. 4 is a cross-sectional view taken along a cutting line BB shown in FIG.

  As shown in FIGS. 2 to 4, the first film forming step includes a plurality of transparent electrode films 2 arranged in a matrix and spaced apart from each other on the surface of one transparent substrate 1, and a plurality of transparent electrode films. 2 is a step of forming a conductive film 3 to be bonded to the film 2. The transparent substrate 1 is a glass substrate or a plastic substrate.

  The transparent electrode film 2 is composed of an anode film 2a and a pair of cathode terminal films 2b arranged away from the anode film 2a, and these materials are indium tin oxide (ITO) or the like. The pair of cathode terminal films 2b are opposed to each other with the anode film 2a interposed therebetween. The arrangement direction of the pair of cathode terminal films 2b is aligned in the row direction. The arrangement direction may be aligned with the column direction.

  The conductive film 3 made of aluminum (Al), chromium (Cr), or the like is composed of a first conductive film 3a, a second conductive film 3b, and a third conductive film 3c that are connected to each other. ing. The conductive film 3 may be the same material as the transparent electrode film 2.

  The first conductive film 3 a is disposed on the outermost peripheral portion of the region where the plurality of transparent electrode films 2 are disposed. The second conductive film 3 b is disposed between the rows of the plurality of transparent electrode films 2. The third conductive film 3 c is disposed between the rows of the plurality of transparent electrode films 2. Thereby, all the anode films 2a and all the cathode terminal films 2b are electrically connected via the first conductive film 3a, the second conductive film 3b, and the third conductive film 3c.

  Next, the second film forming step (step S2) will be described. The second film forming step is a step of forming the organic light emitting film 4 on the surface of the anode film 2a. The material of the organic light emitting film 4 is not particularly limited, and may be the same as the conventional one.

  Next, the third film forming step (step S3) will be described. FIG. 5 is a plan view for explaining the third film forming step. 6 is a cross-sectional view taken along the cutting line CC shown in FIG. FIG. 7 is a cross-sectional view taken along the cutting line DD shown in FIG. As shown in FIGS. 5 to 7, the third film forming step is a step of forming a cathode film 5 that is continuous from the surface of the organic light emitting film 4 to the surface of the cathode terminal film 2 b. Thereby, the cathode film 5 is electrically connected to the cathode terminal film 2b. Since the cathode terminal film 2b and the anode film 2a are electrically connected via the conductive film 3, the cathode film 5 and the anode film 2a are in an electrically connected state (short circuit state). Therefore, even if static electricity is generated in the processes after the third film forming process, it is difficult for charges to be accumulated in the organic light emitting film 4 until this state is released. Therefore, dielectric breakdown of the organic light emitting film 4 due to static electricity is less likely to occur.

  Next, the inspection process (step S4) performed after the third film forming process will be described with reference to FIGS. Each of FIG. 8 to FIG. 13 is a plan view showing a pattern of a part where the conductive film 3 is divided in the inspection process. In each of FIGS. 8 to 13, the description of the cathode film 5 is omitted for easy understanding.

  In the inspection step, first, the first conductive film 3a, the second conductive film 3b, and the third conductive film 3c are connected to the first portion 8 that electrically connects only the anode film 2a and a pair. It divides | segments into the 2nd part electrically connected only with the cathode terminal film | membrane 2b. Thereafter, at least one voltage in the forward direction or the reverse direction is applied between the anode film 2a and the pair of cathode terminal films 2b via the first portion 8 and the second portion. When a forward voltage is applied, an aging process is performed, and the light emission state of the organic light emitting film 4 can be inspected. On the other hand, when a voltage in the reverse direction is applied, a repair process is performed, and a minute portion electrically short-circuited in the organic light emitting film 4 is electrically opened. When the inspection is completed, each of the transparent electrode film 2, the organic light emitting film 4, and the cathode film 5 is sealed.

  In FIG. 8, a connection portion between the first conductive film 3a and the second conductive film 3b, a connection portion between the first conductive film 3a and the third conductive film 3c, and the second conductive film 3b and the third conductive film. A connection portion with the conductive film 3 c is a cut portion 10. In this way, by setting the connection portion of each conductive film as a part to be divided, two conductive films among the first conductive film 3a, the second conductive film 3b, and the third conductive film 3c are divided at once. it can. Therefore, it becomes possible to simplify a parting part. In FIG. 8, since the first conductive film 3a is divided by one row and one column, a voltage is applied to all between the anode film 2a formed on the transparent electrode 1 and the pair of cathode terminal films 2b. To apply the number of inspection anode terminals 6 corresponding to the number of columns and the number of inspection cathode terminals 7 corresponding to the number of rows.

  Further, in FIG. 9, the connection portion between the first conductive film 3a and the second conductive film 3b is removed from the dividing portion 10, and the second portion 9 of the first conductive film 3a is the first row or the last row. Are continuous with the cathode terminal film 2 of the transparent electrode 2 arranged respectively. Further, in FIG. 10, the connection portion between the first conductive film 3a and the third conductive film 3c is removed from the dividing portion 10, and the first portion 8 of the first conductive film 3a is in the first row or the last row. Each is continuous with the anode film 2a of the transparent electrode 2 arranged. Thereby, either the inspection anode terminal 6 or the inspection cathode terminal 7 can be made common. Therefore, the total number of the inspection anode terminal 6 and the inspection cathode terminal 7 can be reduced.

  Further, in FIGS. 11 to 13, both the connection portion between the first conductive film 3 a and the second conductive film 3 b and the connection portion between the first conductive film 3 a and the third conductive film 3 c are divided. It is excluded from 10. Thereby, both the 1st inspection anode terminal 6 and the inspection cathode terminal 7 can be made common. Therefore, the total number of inspection anode terminals 6 or inspection cathode terminals 7 can be further reduced. 11 and 12, the connection portion between the second conductive film 3 b and the third conductive film 3 c is also removed from the dividing portion 10. In FIG. 13, the second conductive film 3 b and the third conductive film are removed. The connection part with 3c becomes the parting part 10. In FIG. 11, instead of the connection portion between the second conductive film 3b and the third conductive film 3c, the second conductive film 3b is divided at two positions sandwiching the connection portion. On the other hand, in FIG. 12, instead of the connection portion between the second conductive film 3b and the third conductive film 3c, the third conductive film 3c is divided at two positions sandwiching the connection portion.

  Next, the cutting process (step S5) performed after the inspection process will be described. In the dividing step, the transparent substrate 1 is divided along the conductive film 3 (first conductive film 3a, second conductive film 3b, and third conductive film 3c). Thereby, each of the first conductive film 3a to the third conductive film 3c is separated from the transparent electrode film 2, and a plurality of lighting panels for an organic electroluminescence lighting device are manufactured from one transparent substrate 1. The

As described above, in the present embodiment, since the anode film 2a and the cathode terminal film 2b are short-circuited by the first conductive film 3a to the third conductive film 3c in the first film formation step, the third film When the film forming process is completed, the cathode film 5 and the anode film 2a are short-circuited. Therefore, it is difficult for charges to be accumulated in the organic light emitting film 4 even if static electricity is generated until the conductive films are divided at the dividing points 10 in the inspection process after the completion of the third film forming process. Furthermore, since all of the anode film 2a and the cathode film 5 disposed on the transparent substrate 1 are equipotential when the third film forming step is completed, electrostatic adsorption of floating foreign matters is less likely to occur. As a result, the dielectric breakdown of the organic light emitting film 4 due to static electricity is less likely to occur. In the present embodiment, in the inspection process, the first conductive film 3a to the third conductive film 3c are divided at the dividing portion 10, The aging process and the repair process can be performed collectively.

  In the present invention, when the aging process and the repair process are performed after the dividing step, and both the number of rows and the number of columns of the plurality of transparent electrode films 2 are even numbers, as shown in FIG. The film 3b may be formed every other row, and the third conductive film 3c may be formed every other column. In this case, the number of second conductive films 3b and the number of third conductive films 3c can be reduced.

DESCRIPTION OF SYMBOLS 1 Transparent substrate 2 Transparent electrode film 2a Anode film 2b Cathode terminal film 3 Conductive film 3a First conductive film 3b Second conductive film 3c Third conductive film 4 Organic light emitting film 5 Cathode film 6 Anode terminal 7 for inspection For inspection Cathode terminal 8 1st part 9 2nd part 10

Claims (7)

A first film forming step of forming a plurality of transparent electrode films disposed on a surface of a single transparent substrate and a conductive film bonded to the plurality of transparent electrode films; Each of the plurality of transparent electrode films is formed as an anode film and a cathode terminal film arranged away from the anode film, and the outermost peripheral portion of the arrangement area of the plurality of transparent electrode films, and the plurality of transparent films A first film forming step of forming the conductive film between electrode films and electrically connecting the anode film and the cathode terminal film through the conductive film;
A second film forming step of forming an organic light emitting film on the surface of the anode film;
A third film forming step of forming a continuous cathode film from the surface of the organic light emitting film to the surface of the cathode terminal film;
The manufacturing method of the organic electroluminescent illuminating device which has a parting process of parting the said 1 transparent substrate along the said electrically conductive film after the said 3rd film-forming process.   In the first film forming step, a pair of cathode terminal films facing each other with the anode film interposed therebetween are formed as the cathode terminal films, the plurality of transparent electrode films are arranged in a matrix, and the pair of cathode terminal films are arranged. The cathode terminal film is aligned in one of the row direction and the column direction, and the first conductive film disposed on the outermost peripheral portion of the placement region and the second conductive film disposed between the plurality of transparent electrode films. And the third conductive film disposed between the plurality of transparent electrode films as the conductive film, the first conductive film, the second conductive film, and the The manufacturing method of the organic electroluminescent illuminating device of Claim 1 which connects a 3rd electrically conductive film mutually.   The first conductive film, the second conductive film, and the third conductive film are electrically connected only to the anode film between the third film forming step and the dividing step. 1 and a second portion that is electrically connected only to the cathode terminal film, and then the anode film and the cathode terminal film via the first portion and the second portion. And an inspection step of applying at least one voltage in the forward direction or the reverse direction between the first and second methods.   The organic electro according to claim 3, wherein in the inspection step, the first portion of the first conductive film is continuous in either the row direction or the column direction with respect to the plurality of anode films. Manufacturing method of luminescence lighting apparatus.   The said 2nd part of the said 1st electrically conductive film is the said test | inspection process, The said 2nd part is following either the row direction or the column direction with respect to the said some cathode terminal film | membrane, The Claim 3 or 4 Manufacturing method of the organic electroluminescence lighting device.   In the inspection step, a connection portion between the first conductive film and the second conductive film is formed at a portion where the first conductive film, the second conductive film, and the third conductive film are separated. 4. The device according to claim 3, wherein at least one of a connection portion between the first conductive film and the third conductive film or a connection portion between the second conductive film and the third conductive film is included. A manufacturing method of an organic electroluminescence lighting device.   In the first film forming step, when both the number of rows and the number of columns of the plurality of transparent electrode films are even, the second conductive film is formed every other row, and the third conductive film is set to 1 The manufacturing method of the organic electroluminescent illuminating device of Claim 2 formed into a film every row.

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