JP4945327B2 - An organic EL element, a manufacturing method thereof, and an organic EL display panel using the same. - Google Patents

Description

  The present invention relates to an organic EL element, a manufacturing method thereof, and an organic EL display panel using the organic EL element.

  An organic EL (Electro Luminescence, hereinafter referred to as EL) element is a light emitting element capable of obtaining surface light emission. FIG. 6 is a schematic perspective view showing the structure of a conventional general organic EL element 11, FIG. 7A is a cross-sectional view showing the structure of the organic EL element 11, and FIG. 3 is an enlarged cross-sectional view showing an organic layer 31. FIG. The organic EL element 11 has a structure in which an organic layer 31 is sandwiched between a first electrode 21 and a second electrode 41 on a substrate 81. The organic layer 31 includes a hole injection layer 311, a hole transport layer 312, an organic light emitting layer 313, and an electron transport. A layer 314 and an electron injection layer 315 are included. Here, when a driving voltage is applied between the first electrode 21 and the second electrode 41, electrons and holes are injected and transported from the second electrode 41 and the first electrode 21 into the organic light emitting layer 313 and recombined. Surface emission is obtained.

  At this time, the organic EL element 11 is required to have a high luminance and a long life. However, since the luminance of the organic EL element 11 is proportional to the current density, it is necessary to increase the current density in order to increase the luminance. However, when the current density is increased, the organic light emitting layer 313 is likely to be deteriorated, and it is not possible to extend the life of the organic EL element 11.

  Therefore, as a method for increasing the luminance and extending the life of organic EL elements, there is a conventional method in which a plurality of light emitting units are stacked and electrically connected in series as shown in Patent Document 1. FIG. 8 is a cross-sectional view of the organic EL element 12 disclosed in Patent Document 1. As shown in the figure, the organic EL element 12 has a first electrode 22, an organic layer 32, an equipotential surface S, an organic layer 32, an equipotential surface S, and an organic layer 32 sequentially stacked on a substrate 82. The second electrode 42 is laminated.

Here, the equipotential surface S is formed by injecting electrons on the first electrode 22 side and holes on the second electrode 42 side, and the organic layers 32 are electrically connected in series. For this reason, the drive voltage of the organic EL element 12 is the sum of the potential consumed by each organic layer 32, but the current flowing through each organic layer 32 is constant. Therefore, when the driving voltage is kept constant and the organic layer 32 and the corresponding conductive potential surface S are increased, the current flowing through each organic layer 32 is decreased, and the luminance of each organic layer 32 is decreased. Since the number of 32 is increased, the luminance of the entire organic EL element 12 can be ensured. Moreover, since the amount of current flowing through each organic layer 32 can be suppressed, deterioration of each organic layer 32 can be prevented, and the life of the organic EL element 12 can be extended.
JP 2003-045676 A

  However, in the organic EL element 12 described in Patent Document 1, a plurality of organic layers 32 and the equipotential surface S are stacked so that the light emitting surfaces overlap each other, and light is emitted from above or below the organic EL element 12. When taking out, since emitted light permeate | transmits the some equipotential surface S and the organic layer 32, and radiate | emits from the organic EL element 12, there existed a problem that light attenuate | damps and a brightness | luminance falls at the time of emission | emission. Moreover, when the emitted light is changed by changing the emission color of each organic layer 32, it is difficult to prepare the mixed color by controlling the emission ratio of each layer.

  Therefore, the present invention improves the reduction in luminance efficiency due to light attenuation, which has been a problem in the past, by electrically connecting a plurality of organic layers in series to increase the luminance and life of the organic EL element. In addition, an object of the present invention is to provide an organic EL element capable of forming a desired mixed color by combining organic layers exhibiting different emission colors and an organic EL display panel configured using the organic EL element.

  In order to solve the above-mentioned problems, the present invention is sandwiched between a first electrode formed on a substrate, a second electrode disposed at a position facing the first electrode, and the first electrode and the second electrode. An organic EL element having a plurality of light-emitting units composed of organic layers, wherein the light-emitting units are arranged in parallel without overlapping on the substrate, and the light-emitting units are electrically connected in series. It is the organic EL element characterized.

  According to the present invention, in the organic EL element having the above-described configuration, each of the light emitting units exhibits at least two different luminescent colors.

  According to the present invention, in the organic EL element having the above-described configuration, a desired color mixture is obtained by changing the area ratio of the light emitting units exhibiting different light emission colors.

  In the organic EL element having the above-described configuration, in each of the adjacent light emitting units, the first electrode in one light emitting unit and the second electrode in the other adjacent light emitting unit are connected via a columnar electrode. It is characterized by.

  Moreover, this invention is a manufacturing method of the organic EL element of the said structure, Comprising: The process of forming the several 1st electrode on a board | substrate, The process of forming the separator which consists of an insulating member in the gap | interval of the said adjacent 1st electrode. A step of forming an electrode material layer on the substrate, a step of removing the electrode material layer while leaving a part on the first electrode, and a step of forming an organic layer on the substrate And a step of forming a plurality of second electrodes on the substrate to face the first electrodes.

  Moreover, this invention is a manufacturing method of the organic EL element of the said structure, Comprising: The layer thickness of the said electrode material layer is thicker than the layer thickness of the said organic layer, It is characterized by the above-mentioned.

  Further, the present invention is directed to a plurality of line-shaped anodes provided on a substrate, a plurality of line-shaped cathodes arranged so as to cross and face each other, and each intersection of the anode and the cathode. An organic EL display panel configured by sandwiching the organic EL element according to any one of claims 1 to 4, wherein at one end of a plurality of light emitting units connected in series constituting the organic EL element, The organic EL display panel is characterized in that a first electrode in the light emitting unit is connected to the anode, and a second electrode in the other light emitting unit is connected to the cathode.

  Further, the present invention provides a transistor connected to the signal line and the scanning line near each intersection of the plurality of signal lines and the plurality of scanning lines provided on the substrate, and a common electrode disposed to face the transistor. An organic EL display panel comprising the organic EL element according to any one of claims 1 to 4 sandwiched between the transistor and the common electrode, wherein the series constituting the organic EL element An organic material characterized in that, at both ends of a plurality of connected light emitting units, a first electrode in one light emitting unit is connected to the transistor, and a second electrode in the other light emitting unit is connected to the common electrode. This is an EL display panel.

  According to the first configuration of the present invention, the current density flowing through the organic layer of each light emitting unit is constant by electrically connecting a plurality of light emitting units in series. Therefore, if the number of light emitting units connected in series is increased and the driving voltage is increased accordingly, the current density flowing through each organic layer is kept constant, and the luminance of the entire organic EL element is increased by the increase of the light emitting units. be able to. At the same time, it is possible to extend the life of the organic EL element by suppressing an increase in the current density flowing per organic layer.

  In addition, a plurality of light emitting units are arranged in parallel in the same plane without overlapping on the substrate, and light emitted from each light emitting unit is emitted as it is without passing through other adjacent light emitting units. Can be suppressed.

  According to the second configuration of the present invention, when the plurality of light emitting unit layers are configured with at least two different light emitting colors, different light emitting colors from the light emitting units arranged in parallel on the same plane without overlapping on the substrate. Therefore, a desired color mixture can be obtained by controlling the emission ratio of the light emitted from each light emitting unit.

  In addition, according to the third configuration of the present invention, a desired color mixture can be obtained by controlling the light emission ratio of each light emitting unit by changing the area ratio of the light emitting units exhibiting the different light emission colors.

  According to the fourth configuration of the present invention, in each adjacent light emitting unit, the first electrode in one light emitting unit and the second electrode in the other light emitting unit are connected to each other via the columnar electrode. Thus, the first electrode and the second electrode of the light emitting unit can be reliably conducted. Therefore, each light emitting unit can be made high definition, and the distance between adjacent light emitting units can be reduced.

  According to the fifth configuration of the present invention, in the method of manufacturing an organic EL element, the step of forming an electrode material on the substrate, and the other part of the electrode material layer leaving a part on the first electrode The columnar electrode can be easily formed on the first electrode by the step of removing. Conventionally, when the distance between each light emitting unit is shortened and each light emitting unit is further refined, in the organic EL element manufacturing process, the organic material forming the organic layer is a contact for electrically connecting the first electrode and the second electrode. It is difficult to electrically connect a plurality of light emitting units in series in order to block the hole and prevent conduction.

  However, by forming the organic layer after forming the columnar electrode on the first electrode, the conduction between the first electrode and the second electrode is reliably ensured through the columnar electrode without being obstructed by the organic material. Therefore, a plurality of light emitting units can be electrically connected in series while shortening the distance between the respective light emitting units and increasing the definition of each light emitting unit.

  Further, according to the sixth configuration of the present invention, the thickness of the electrode material layer is larger than the thickness of the organic layer, thereby preventing the columnar electrode from being completely covered with the organic material, and the first electrode and the first electrode. The conduction of the two electrodes can be made more reliable, and the production efficiency of the organic EL element can be increased.

  According to the seventh configuration of the present invention, the organic EL is provided at each intersection of a plurality of line-shaped anodes provided on the substrate and a plurality of line-shaped cathodes arranged so as to cross the anode. By configuring the organic EL display panel by sandwiching the elements, the organic EL elements sandwiched between the intersections form one pixel in the display area of the display panel.

  At this time, the organic EL element has a plurality of light emitting units arranged in parallel on the same plane without overlapping on the substrate and electrically connected in series, so that high luminance and long life of one pixel unit are achieved. Can be achieved. As a result, it is possible to increase the brightness and extend the life of the entire organic EL display panel.

  According to the eighth configuration of the present invention, a transistor connected to the signal line and the scanning line near each intersection of the plurality of signal lines and the plurality of scanning lines provided on the substrate; By forming the organic EL display panel by sandwiching the organic EL element between the common electrode disposed opposite to the transistor and the common electrode, the organic EL element connected to each transistor is displayed in the display area of the display panel. One pixel is formed.

  At this time, the organic EL element has a plurality of light emitting units arranged in parallel on the same plane without overlapping on the substrate and electrically connected in series, so that high luminance and long life of one pixel unit are achieved. Can be achieved. As a result, it is possible to increase the brightness and extend the life of the entire organic EL display panel. Moreover, an image can be displayed on a display, adjusting the luminance gradation of each organic EL element with a transistor.

  Hereinafter, an organic EL device according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that a description of portions common to those in FIGS. 6 to 8 in the conventional example is omitted. Further, in these drawings, for easy understanding, the dimensional ratio of each member is different from the actual one, and the detailed configuration is omitted and conceptually shown.

[Embodiment 1]
FIG. 1 is a schematic perspective view showing a configuration of an organic EL element 1 according to the present invention. The organic EL element 1 is configured such that the first light emitting unit 1a and the second light emitting unit 1b are arranged in parallel on the transparent glass substrate 8 without overlapping, and the first light emitting unit 1a and the second light emitting unit 1b are Electrically connected in series. Specifically, the first light emitting unit 1a and the second light emitting unit 1b are configured by sandwiching organic layers 3a and 3b between the first electrodes 2a and 2b and the second electrodes 4a and 4b, and each organic layer 3a. 3b includes a hole injection layer 311, a hole transport layer 312, an organic light emitting layer 313, an electron transport layer 314, and an electron injection layer 315 as in the organic layer shown in FIG. 7B.

 A separator (not shown in FIG. 1) made of an insulating member is provided between the adjacent first electrodes 2a and 2b, and the adjacent first electrodes 2a and 2b are insulated and separated. Further, the columnar electrode 9 protrudes from the first electrode 2 a of the first light emitting unit 1 a, and the second electrode 4 b of the second light emitting unit 1 b is electrically connected on the side surface of the columnar electrode 9.

 Here, when a driving voltage is applied between the first electrode 2b of the second light emitting unit 1b and the second electrode 4a of the first light emitting unit 1a, an equivalent current flows through the first light emitting unit 1a and the second light emitting unit 1b. In each of the organic layers 3a and 3b, electrons and holes are recombined to emit light. Therefore, the organic EL element 1 according to this embodiment can be represented by the equivalent circuit shown in FIG.

  According to this configuration, the organic EL element 1 according to this embodiment is divided into a first light emitting unit 1a and a second light emitting unit 1b, compared to the conventional organic EL element 11 shown in FIG. These are electrically connected in series. Therefore, if the number of light emitting units connected in series is increased and the driving voltage is increased accordingly, the current density flowing through each organic layer 3 is kept constant, and the luminance of the entire organic EL element 1 is increased by the increase of the light emitting units. Can be raised. At the same time, it is possible to extend the life of the organic EL element by suppressing an increase in the current density flowing per organic layer.

  Further, when a plurality of organic layers 32 are overlapped and stacked in series as in the conventional organic EL element 12 shown in FIG. 8, light emitted from each of the organic layers 32a to 32c has a plurality of equipotential surfaces. S and the organic layers 32a to 32c are transmitted through and emitted from the organic EL element 12, so that there is a problem that the light is attenuated and the luminance is lowered at the time of emission, but the organic EL element 1 according to the present embodiment has a problem on the substrate. Since the light emitting units 1a and 1b are arranged in parallel so as not to overlap, the light emitted from the light emitting units 1a and 1b can be extracted without being attenuated. Accordingly, it is possible to reduce the light transmission loss and improve the emission efficiency of the light emitted to the outside.

  In addition, the conventional organic EL element 12 in which the organic layers 32a to 32c are superposed is difficult to control the color mixture by controlling the light emission ratio of each layer, but the organic EL element 1 according to the present invention is arranged in parallel. If the light emission colors of the respective light emitting units 1a and 1b are changed to mix light, the light emission ratio of each light emitting unit can be easily controlled, so that a desired color mixture can be obtained.

  In addition, in the conventional organic EL element configured by superposing the organic layers 32a to 32c, it is structurally impossible to stack by changing the area ratio of each organic layer, so that the light emission ratio of each organic layer is controlled. However, it was necessary to newly prepare an organic material constituting the organic layer or to change the thickness of the organic layer. However, since the organic EL element 1 according to the present embodiment can be formed by changing the area ratio of each light emitting unit, the organic EL element 1 is designed by changing the area ratio of the light emitting units exhibiting different emission colors. By controlling the light emission ratio of each light emitting unit, a desired color mixture can be obtained.

  Next, a method for manufacturing the organic EL element 1 according to this embodiment will be described. FIG. 3 is a cross-sectional view showing a manufacturing process of the organic EL element 1 according to this embodiment. In the organic EL element 1 according to the present embodiment, first, the first electrodes 2a and 2b are formed on the substrate 8, and then the separator 6 made of an insulating member that covers the gaps and shoulders of the first electrodes 2a and 2b is provided. Here, the separator 6 can be formed by depositing the film on the substrate 8 by a vacuum deposition method or the like and then removing the openings of the first electrodes 2a and 2b by etching.

  Next, an aluminum layer 9 'is formed to a predetermined thickness on the substrate 8 from above the first electrodes 2a, 2b and the separator 6 (see FIG. 3A), leaving a predetermined region on the first electrode 2a. Etch away. Thereby, the columnar electrode 9 having the same height as the thickness of the aluminum layer 9 'is formed on the first electrode 2a (see FIG. 3B). At this time, the first electrode 2a and the columnar electrode 9 are in an electrically connected state. In addition, as a metal which comprises the columnar electrode 9, the material excellent in electroconductivity, such as molybdenum, silver, or these alloys other than aluminum, can be used.

  Next, an organic material is vacuum-deposited on the first electrode 2a, 2b and the separator 6 on the substrate 8 to a predetermined thickness to form organic layers 3a, 3b on the first electrode 2a, 2b (FIG. 3 ( c)). At this time, the thickness of the organic layers 3 a and 3 b is formed to be lower than the height of the columnar electrode 9. Therefore, the vicinity of the top of the columnar electrode 9 is exposed from the upper surface of the organic layer 3. The organic layer includes a hole injection layer, a hole transport layer, an organic light emitting layer, an electron transport layer, and an electron injection layer.

  Next, a reverse-tapered separator 7 is disposed at a predetermined position, and aluminum is vapor-deposited on the organic layers 3a and 3b from a direction perpendicular to the substrate 8, and a first electrode corresponding to the first electrodes 2a and 2b. Two electrodes 4a and 4b are formed (see FIG. 3D). At this time, the portion where the reverse-tapered separator 7 is disposed is formed such that aluminum is not deposited and the second electrodes 4a and 4b do not contact each other.

  At this time, the second electrode 4a is not in contact with the columnar electrode 9, but the second electrode 4b is in contact with the side surface of the columnar electrode 9, and therefore the first electrode 2a and the second light emitting unit in the first light emitting unit 1a. The second electrode 4 b in 1 b is electrically connected via the columnar electrode 9. Therefore, the organic EL element 1 in which the first light emitting unit 1a and the second light emitting unit 1b are arranged in parallel without overlapping on the same substrate 8 and the first light emitting unit 1a and the second light emitting unit 1b are electrically connected in series is provided. Completed (see FIG. 3 (e)).

  In addition to using the separator 7, the second electrodes 4 a and 4 b can be formed so as not to contact each other using a mask or a plating resist. Although not shown in FIG. 3, it is necessary to seal the entire organic EL element 1 using a sealing material.

  4 is an enlarged cross-sectional view showing the vicinity of the columnar electrode 9 according to the present embodiment. As shown in FIG. 4, the height of the columnar electrode 9 is sufficiently higher than the thickness of the organic layer 3a. Is desirable. This is because when the organic layer is formed, the organic material may rise up the side surface of the columnar electrode 9 and be vacuum-deposited. In such a case, the top of the columnar electrode 9 is covered with the organic layer, and the second electrode and the columnar shape This is because the electrode 9 may not conduct.

  Next, the configuration of the organic EL element 1 according to this embodiment will be specifically described with reference to FIG. Although the organic EL element 1 according to the present embodiment is a bottom emission system that extracts light from below, a configuration of the organic EL element 1 may be a top emission system that extracts light from above.

  Here, the substrate 8 is preferably made of an insulating material. Specific examples include glass and plastic. Further, by making the substrate 8 transparent, it is possible to extract light emitted from the light emitting units 1a and 1b from below (substrate 8 side), but when extracting light from above (second electrode 4 side), It does not have to be transparent.

  The first electrodes 2a and 2b are formed on the substrate 8, and specifically, a transparent electrode such as ITO can be used. Here, by using the transparent first electrodes 2a and 2b, light emitted from the light emitting units 1a and 1b can be taken out from the lower side (substrate 8 side), but from the upper side (second electrode 4 side). When taking out light, it is not necessary to be transparent, and a material having a low resistivity such as copper or aluminum can be used for the first electrodes 2a and 2b.

  The second electrodes 4a and 4b are formed on the organic layers 3a and 3b. When light emitted from the organic layers 3a and 3b is taken out from above, a transparent electrode such as ITO is used to lower the emitted light. When taking out from the above, a material having a low resistivity such as copper or aluminum is used.

  The organic layers 3a and 3b include a hole injection layer 311, a hole transport layer 312, an organic light emitting layer 313, an electron transport layer 314, and an electron injection layer 315 (see FIG. 7B), and the first electrode 2a, Examples of the material of the hole injection layer 311 that improves the hole injection efficiency from 2b include arylamines and phthalocyanines (copper phthalocyanine). Examples of the material of the hole transport layer 312 that functions as an electron barrier include arylamines.

  Examples of the material for the electron injection layer 315 that improves the efficiency of electron injection from the second electrodes 4a and 4b include alkali metals such as lithium, lithium fluoride, lithium oxide, and lithium complexes. Examples of the material of the electron transport layer 314 having a function as a hole barrier include aluminum complexes, oxadiazoles, triazoles, and phenanthrolines.

  The organic light emitting layer 313 is a portion that emits light by being excited by recombination of electrons and holes given by the first electrodes 2a and 2b and the second electrodes 3a and 3b, and has a light emitting characteristic with strong fluorescence or phosphorescence. The compound which has is used. Here, the emission color can be changed depending on the material of the organic light emitting layer.

  Next, an organic EL display panel using the organic EL element 1 according to the present embodiment will be described. The organic EL display panel using the organic EL element 1 according to the present embodiment can be configured as either a passive matrix type or an active matrix type. FIG. 5 is an equivalent circuit diagram showing a part of a passive matrix organic EL display panel. In the case of a passive matrix type, a plurality of line-shaped anodes formed on a transparent glass substrate and orthogonal to the anodes. It can be configured by sandwiching the organic EL element 1 at each intersection with a plurality of line-shaped cathodes. With this configuration, one pixel with each organic EL element 1 as a unit is formed, and the display area of the organic EL display panel is configured by the plurality of organic EL elements 1 sandwiched between the intersections of the anode and the cathode. The Moreover, a passive drive circuit can display a desired image by applying a voltage to the cathode corresponding to the organic EL element 1 to emit light while sequentially changing the anode to which the voltage is applied.

  Here, at the intersection of the anode and the cathode, the first electrode 2b in the second light emitting unit 1b of the organic EL element 1 is connected to the anode, and the second electrode 4a in the first light emitting unit 1a is connected to the cathode. The In addition, as a manufacturing method of a passive matrix type organic EL display panel, the substrate 8 constituting the organic EL element 1 is the transparent glass substrate used for the display panel, and the formation process of the first electrode 2 is the formation of the line-shaped anode. It can be manufactured by performing the same process and forming the second electrode 3 in the same process as the formation of the linear cathode.

  In addition, since the organic EL element 1 has a plurality of light emitting units arranged in parallel on the same plane without overlapping on the substrate and electrically connected in series, it is possible to increase the luminance and life of each pixel. Can be planned. As a result, it is possible to increase the brightness and the life of the entire passive matrix organic EL display panel.

  In the case of the active matrix type, the signal lines and the scanning lines are connected in the vicinity of the intersections of the plurality of signal lines formed on the substrate and the plurality of scanning lines intersecting the signal lines in a matrix. The organic EL element 1 can be sandwiched between a transistor and a common electrode disposed opposite to the transistor. With this configuration, one pixel is formed with the organic EL element 1 as a unit on the display panel, and a display region of the organic EL display panel is configured by the plurality of organic EL elements 1 arranged in a matrix form.

  Here, the transistor and the first electrode 2b in the second light emitting unit 1b of the organic EL element 1 are connected, and the second electrode 4a in the first light emitting unit 1a is connected to the common electrode. With this structure, the luminance gradation of the light emitting units 1a and 1b can be adjusted by adjusting the strength of the driving voltage applied to the organic EL element 1 with a transistor.

  In addition, since the organic EL element 1 has a plurality of light emitting units arranged in parallel on the same plane without overlapping on the substrate and electrically connected in series, it is possible to increase the luminance and life of each pixel. Can be planned. As a result, it is possible to increase the brightness and the life of the entire active matrix organic EL display panel.

  The present invention is not limited to the above-described embodiments, and various modifications are possible. Embodiments obtained by appropriately combining technical means disclosed in different embodiments are also included in the present invention. Included in the technical scope.

  For example, in the present embodiment, the two light emitting units constituting the organic EL element are arranged on the same substrate, but the case where two or more light emitting units are arranged on the same substrate is also included in the technical scope of the present invention.

  The present invention can be used as a matrix display using an organic EL element and a surface emitting device for illumination.

These are the schematic perspective views which show the structure of the organic EL element which concerns on this invention. These are the equivalent circuit diagrams of the organic EL element which concerns on this invention. These are sectional drawings which show the manufacturing process of the organic EL element which concerns on this invention. These are sectional drawings which expand and show the columnar electrode vicinity which concerns on this invention. FIG. 2 is an equivalent circuit diagram showing a part of a passive matrix organic EL display panel according to the present invention. FIG. 3 is a schematic perspective view showing a configuration of a conventional organic EL element. (A) is sectional drawing which shows the structure of the conventional organic EL element, (b) is sectional drawing which expands and shows an organic layer. These are sectional drawings which show the structure of the conventional organic EL element.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Organic EL element 1a 1st light emission unit 1b 2nd light emission unit 2 1st electrode 3 Organic layer 4 2nd electrode 6 Separator 7 Reverse-tapered separator 8 Substrate 9 Columnar electrode

Claims (2)

A light emitting unit comprising: a first electrode formed on a substrate; a second electrode disposed at a position facing the first electrode; and an organic layer sandwiched between the first electrode and the second electrode. a plurality of Yes,
The light emitting units are arranged in parallel without overlapping on the substrate and the light emitting units are electrically connected in series ,
In each of the adjacent light emitting units, a method for producing an organic EL element in which a first electrode in one light emitting unit and a second electrode in the other adjacent light emitting unit are connected via a columnar electrode,
Forming a plurality of first electrodes on a substrate;
Forming a separator made of an insulating member in a gap between adjacent first electrodes;
Forming an electrode material layer on the substrate;
Forming the columnar electrode in conduction with the first electrode by removing the other part of the electrode material layer while leaving a part on the first electrode;
Forming an organic layer on the substrate;
Forming a plurality of second electrodes on the substrate so as to face the first electrodes,
The method of manufacturing an organic EL element, wherein the electrode material layer has a thickness greater than that of the organic layer. 2. The method of manufacturing an organic EL element according to claim 1, wherein each of the adjacent light emitting units is formed by the organic layer exhibiting a different emission color.

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