Patent Publication Number: US-10790469-B2

Title: Light-emitting device with a sealing film

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 15/551,872, filed on Aug. 17, 2017 which is a U.S. National Stage entry of PCT Application No. PCT/JP2015/054341, filed on Feb. 17, 2015. The contents of the foregoing are incorporated by reference. 
    
    
     TECHNICAL FIELD 
     The present invention relates to a light-emitting device. 
     BACKGROUND ART 
     In recent years, there has been progress in the development of light-emitting devices having light-emitting units using organic EL (Organic Electroluminescence) elements. The organic EL element is configured of an organic layer interposed between a first electrode and a second electrode. Since the organic layer is easily affected by moisture, oxygen or the like, the light-emitting unit needs to be sealed. One of the ways to seal the light-emitting unit is by using a sealing layer. Ways to form the sealing layer include gas phase film formation methods such as ALD (Atomic Layer Deposition), CVD, sputtering or the like. 
     Meanwhile, using a resin substrate as a substrate of the organic EL element is being considered. Using the resin substrate allows the light-emitting unit to have flexibility. However, resin materials transmit moisture. When moisture reaches the organic layer of the organic EL element, the organic layer is deteriorated, attributing to the moisture. To avoid such deterioration, forming a gas barrier film over the resin substrate is considered. For example, Patent Document 1 discloses a gas barrier film configured by laminating an inorganic film and a stress relaxation film. The stress relaxation film is formed by an atmospheric plasma treatment. Moreover, Patent Document 1 describes that a sealing film for sealing the organic EL element may be formed in the same way as the gas barrier film. 
     RELATED ART DOCUMENT 
     Patent Document 
     [Patent Document 1]: WO 2006/067952 
     SUMMARY OF THE INVENTION 
     In a case where a substrate is made of resin, as described above, it is necessary to form the gas barrier film. In addition, the sealing film for sealing the organic EL element is also formed over the substrate. Thus, multiple films are formed over a surface of the substrate where the organic EL element is formed. In this case, a stress originated by the multiple films is applied to the substrate, thus increasing the risk of deformation of the substrate. 
     An example of the problem to be solved by the present invention is to reduce a stress applied to a substrate including a resin material on which an organic EL element is formed. 
     Means for Solving the Problem 
     The invention described in claim  1  is a light-emitting device including: 
     a substrate including a resin material; 
     a first stacked film formed on a first surface of the substrate and including plural stacked layers; 
     a light-emitting unit formed on the first stacked film and including an organic layer; 
     a second stacked film covering the light-emitting unit and including plural stacked layers; 
     a third stacked film formed on a second surface of the substrate and including plural stacked layers; 
     a fourth stacked film formed overlapping the third stacked film and including plural stacked layers, 
     in which the number of layers of the third stacked film is the same as that of the first stacked film, and materials of respective ones of the plurality of layers constituting the third stacked film are the same as materials of respective ones of the plurality of layers of the first stacked film positioned in a laminating order corresponding to a laminating order of the third stacked film when counted from the substrate side, and 
     in which the number of layers of the fourth stacked film is the same as that of the second stacked film, and materials of respective ones of the plurality of layers constituting the fourth stacked film are the same as materials of respective ones of the plurality of layers of the fourth stacked film positioned in a laminating order corresponding to a laminating order of the fourth stacked film when counted from the substrate side. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The objects described above, and other objects, features and advantages are further made apparent by suitable embodiments that will be described below and the following accompanying drawings. 
         FIG. 1  is a cross-sectional view illustrating a light emitting device according to an embodiment. 
         FIG. 2  is a cross-sectional view illustrating a configuration of a first stacked film. 
         FIG. 3  is a cross-sectional view illustrating a configuration of a second stacked film. 
         FIG. 4  is a diagram illustrating a configuration of a first stacked film according to Modification Example 1. 
         FIG. 5  is a diagram illustrating a configuration of a second stacked film according to Modification Example 1. 
         FIG. 6  is a cross-sectional view illustrating a first stacked film according to Modification Example 2. 
         FIG. 7  is a cross-sectional view illustrating a second stacked film according to Modification Example 2. 
         FIG. 8  is a plan view illustrating a configuration of a light emitting device according to Example 1. 
         FIG. 9  is a diagram in which a second electrode and a second stacked film are removed from  FIG. 8 . 
         FIG. 10  is a diagram in which an organic layer and an insulating layer are removed from  FIG. 9 . 
         FIG. 11  is a cross-sectional view taken along line A-A of  FIG. 8 . 
         FIG. 12  is a plan view of a light emitting device according to Example 2. 
         FIG. 13  is a diagram in which a partition wall, a second electrode, and an insulating layer are removed from  FIG. 12 . 
         FIG. 14  is a cross-sectional view taken along line B-B of  FIG. 12 . 
         FIG. 15  is a cross-sectional view taken along line C-C of  FIG. 12 . 
         FIG. 16  is a cross-sectional view taken along line D-D of  FIG. 12 . 
         FIG. 17  is an equivalent circuit diagram of a light-emitting device. 
     
    
    
     DESCRIPTION OF EMBODIMENT 
     Embodiments of the present invention will be described below by referring to the drawings. Moreover, in all the drawings, the same constituent elements are given the same reference numerals, and descriptions thereof will not be repeated. 
       FIG. 1  is a cross-sectional view illustrating a configuration of a light-emitting device  10  according to an embodiment. The light-emitting device  10  according to the embodiment includes a substrate  100 , a light-emitting unit  140 , a first stacked film  210 , a second stacked film  220 , a third stacked film  310 , and a fourth stacked film  320 . The substrate  100  includes a resin material. The first stacked film  210  is configured of multiple stacked layers and is formed on a first surface  102  of the substrate  100 . The light-emitting unit  140  is formed over the first stacked film  210  and includes an organic layer. The second stacked film  220  is configured of multiple stacked layers and covers the light-emitting unit  140 . The third stacked film  310  is configured of multiple stacked layers and is formed on a second surface  104  of the substrate  100 . The fourth stacked film  320  is configured of multiple stacked layers and is formed overlapping the third stacked film  310 . In other words, the third stacked film  310  and the fourth stacked film  320  are formed in this order over the second surface  104 . The number of layers in the third stacked film  310  is the same as that of the first stacked film  210 , and respective materials of the multiple layers constituting the third stacked film  310  are the same as respective materials of the multiple layers of the first stacked film  210 , the layers of the third stacked film  310  and the layers of the first stacked film  210  corresponding in the laminating order when counted from the substrate  100  side. Moreover, the number of layers of the fourth stacked film  320  is the same as that of the second stacked film  220 , and respective materials of the multiple layers constituting the fourth stacked film  320  are the same as respective materials of the multiple layers of the second stacked film  220 , the layers of the fourth stacked film  320  and the layers of the second stacked film  220  corresponding in the laminating order when counted from the substrate  100  side. A detailed description will be provided below. 
     The substrate  100  contains a resin material and transmits visible light. The substrate  100  is, for example, a resin substrate, and its thickness is equal to or greater than 10 μm and equal to or less than 1,000 μm. A resin used for the substrate  100  is, for example, PEN (polyethylene naphthalate), PES (polyether sulfone), PET (polyethylene terephthalate), or polyimide. 
     The light-emitting unit  140  is formed on the first surface  102  of the substrate  100 . The light-emitting unit  140  is configured by laminating the first electrode, the organic layer, and the second electrode in this order. 
     The first electrode is a transparent electrode having optical transparency. Materials of the transparent electrode are those containing a metal, for example, a metal oxide such as ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide), IWZO (Indium Tungsten Zinc Oxide), ZnO (Zinc Oxide) or the like. The thickness of the first electrode is, for example, equal to or greater than 10 nm and equal to or less than 500 nm. The first electrode is formed, for example, by sputtering or vapor deposition. Meanwhile, the first electrode may be formed using a conductive organic material such as carbon nanotubes, PEDOT/PSS or the like. 
     The organic layer has a light-emitting layer. The organic layer is configured by laminating, for example, a hole injection layer, a light-emitting layer, and an electron injection layer in this order. A hole transporting layer may be formed between the hole injection layer and the light-emitting layer. In addition, an electron transporting layer may be formed between the light-emitting layer and the electron injection layer. The organic layer may be formed by vapor deposition. Further, at least one layer of the organic layer, for example, a layer in contact with the first electrode, may be formed by coating, such as ink jetting, printing, spraying or the like. Meanwhile, in this case, the remaining layers of the organic layer are formed by vapor deposition. Further, all layers of the organic layer may be formed by coating. 
     The second electrode includes, for example, a metal layer constituted of a metal selected from a first group consisting of Al, Au, Ag (may be Ag ink or Ag nanowires), Pt, Mg, Sn, Zn, and In, or an alloy of metals selected from the first group. In this case, the second electrode has light shielding properties. The thickness of the second electrode is, for example, equal to or greater than 10 nm and equal to or less than 500 nm. However, the second electrode may be formed using a material which was exemplified as the material of the first electrode. The second electrode is formed by, for example, sputtering or vapor deposition. 
     In addition, the light-emitting unit  140  is sealed using the second stacked film  220 . The second stacked film  220  is configured by laminating multiple layers. Each layer configuring the second stacked film  220  is an inorganic film and is formed by ALD (Atomic Layer Deposition). 
     In addition, the first stacked film  210  is formed on the first surface  102  of the substrate  100 , and the third stacked film  310  and the fourth stacked film  320  are formed over the second surface  104  of the substrate  100  in this order. The first stacked film  210 , the third stacked film  310 , and the fourth stacked film  320  are formed in order to inhibit moisture from permeating the substrate  100 , each film being configured of multiple stacked layers. All of the layers are formed by ALD. The first stacked film  210 , the second stacked film  220 , the third stacked film  310 , and the fourth stacked film  320  are formed, for example, of an inorganic film. 
     Meanwhile, the third stacked film  310  and the first stacked film  210  are formed in the same process. Therefore, the number of layers of the third stacked film  310  and that of the first stacked film  210  are the same, and the respective materials of the multiple layers constituting the third stacked film  310  are the same as the respective materials of the multiple layers of the first stacked film  210 , the layers of the third stacked film  310  and the layers of the first stacked film  210  corresponding in the laminating order when counted from the substrate  100  side. Moreover, depending on manufacturing conditions, the third stacked film  310  may have the same configuration as the first stacked film  210 , including the thickness of each layer. 
     Meanwhile, the fourth stacked film  320  and the second stacked film  220  are formed in the same process. Therefore, the number of layers of the fourth stacked film  320  and that of the second stacked film  220  are the same, and the respective materials of the multiple layers constituting the fourth stacked film  320  are the same as the respective materials of the second stacked film  220 , the layers of the fourth stacked film  310  and the layers of the second stacked film corresponding in the laminating order when counted from the substrate  100  side. Moreover, depending on manufacturing conditions, the fourth stacked film  320  may have the same configuration as the second stacked film  220 , including the thickness of each layer. 
     Meanwhile, a planarization layer (for example, an organic layer) may be provided between the first surface  102  of the substrate  100  and the first stacked film  210 . Moreover, a planarization layer may also be provided between the second surface  104  of the substrate  100  and the third stacked film  310 . 
       FIG. 2  is a cross-sectional view illustrating a configuration of the first stacked film  210 . The first stacked film  210  has a first layer  212  and a second layer  214 . The first layer  212  and the second layer  214  are, for example, metal oxide films. Specifically, the first layer  212  is formed using an aluminum oxide (Al2O3), and the second layer  214  is formed using a titanium oxide (TiO2). The thickness of each of the first layer  212  and the second layer  214  is equal to or greater than 3 nm and equal to or less than 10 nm. However, the thickness of each layer is not limited to this range. Also, the first stacked film  210  may be configured by repeatedly laminating the first layer  212  and the second layer  214  in this order. Moreover, the first stacked film  210  may be configured by laminating once or multiple times three layers having materials different from one another. 
     Meanwhile, as mentioned above, the third stacked film  310  also has a configuration illustrated in  FIG. 2 . 
       FIG. 3  is a cross-sectional view illustrating a configuration of the second stacked film  220 . The second stacked film  220  is configured by repeatedly laminating a first layer  222  and a second layer  224  multiple times. For this reason, the second stacked film  220  is thicker than the first stacked film  210 . By making the second stacked film  220  thicker than the first stacked film  210 , sealability of the second stacked film  220  is improved. Meanwhile, the first layer  222  is formed using an aluminum oxide (Al2O3), and the second layer  224  is formed using a titanium oxide (TiO2). A titanium oxide has insulating properties under a room temperature condition. However, for example, a titanium oxide obtains conductivity when made into a thin film. Each thickness of the first layer  222  and the second layer  224  is equal to or greater than 3 nm and equal to or less than 10 nm. However, the thickness of these layers is not limited to this range. 
     Meanwhile, as mentioned above, the fourth stacked film  320  also has a configuration illustrated in  FIG. 3 . 
       FIG. 4  illustrates a configuration of the first stacked film  210  according to Modification Example 1. In the example illustrated in  FIG. 4 , the first stacked film  210  is configured by repeatedly laminating the first layer  212  and the second layer  214 , in this order. Any layer of the first stacked film  210  is thicker compared to other layers configuring the first stacked film  210 . In the example illustrated in the drawing, the uppermost layer of the first stacked film  210  (a layer facing the light-emitting unit  140 ) is thicker compared to the other layers of the first stacked film  210 . For example, the thickness of the uppermost layer of the first layer  212  is thicker by four times or more than the thickness of the thickest layer out of the other layers. In addition, the thickness of the first layer  212  is, for example, equal to or greater than 20% and equal to or less than 80% of the thickness of the first stacked film  210 . 
     Meanwhile, in a case where the first stacked film  210  has the configuration shown in  FIG. 4 , the third stacked film  310  also has the configuration shown in  FIG. 4 . In this case, a layer of the third stacked film  310  farthest from the second surface  104  of the substrate  100  is thicker compared to the other layers of the third stacked film  310 . 
       FIG. 5  illustrates a configuration of the second stacked film  220  according to Modification Example 1. In the example illustrated in the drawing, the second stacked film  220  is configured by repeatedly laminating the first layer  222  and the second layer  224 , in this order. However, since the number of layers of the second stacked film  220  is larger than the number of layers of the first stacked film  210 , the second stacked film  220  is thicker than the first stacked film  210 . Moreover, any layer of the second stacked film  220  is thicker compared to the other layers configuring the second stacked film  220 . In the example illustrated in  FIG. 5 , the first layer  222  at the bottom (that is, a layer facing the light-emitting unit  140 ) is thicker compared to the other layers configuring the second stacked film  220 . For example, the thickness of the first layer  222  at the bottom is thicker by four times or more than the thickness of the thickest layer out of the other layers. Moreover, the thickness of the first layer  222  is, for example, equal to or greater than 20% and equal to or less than 80% of the thickness of the second stacked film  220 . 
     Meanwhile, in a case where the second stacked film  220  has the configuration illustrated in  FIG. 5 , the fourth stacked film  320  also has the configuration illustrated in  FIG. 5 . In this case, a layer of the fourth stacked film  320  closest to the substrate  100  is thicker compared to the other layers of the fourth stacked film  320 . 
       FIG. 6  is a cross-sectional view illustrating the first stacked film  210  according to Modification Example 2. The first stacked film  210  according to Modification Example 2 has the same configuration as the first stacked film  210  shown in  FIG. 4 , except that a layer located at the second or higher layer counted from the light-emitting unit  140  side is thicker compared to the other layers of the first stacked film  210 . Meanwhile, in a case where the first stacked film  210  has the configuration shown in  FIG. 6 , the third stacked film  310  also has the configuration shown in  FIG. 6 . 
       FIG. 7  is a cross-sectional view illustrating the second stacked film  220  according to Modification Example 2. The second stacked film  220  according to Modification Example 2 has the same configuration as the second stacked film  220  shown in  FIG. 5 , except that a layer located at the second or higher layer counted from the substrate  100  side is thicker compared to the other layers of the second stacked film  220 . Meanwhile, in a case where the second stacked film  220  has the configuration shown in  FIG. 7 , the fourth stacked film  320  also has the configuration shown in  FIG. 7 . 
     Meanwhile, the first stacked film  210  illustrated in  FIG. 2  may be used in combination with any second stacked film  220  illustrated in  FIG. 3 ,  FIG. 5 , and  FIG. 7 . Moreover, the first stacked film  210  illustrated in  FIG. 4  may be used in combination with any second stacked film  220  illustrated in  FIG. 3 ,  FIG. 5 , and  FIG. 7 . In addition, the first stacked film  210  illustrated in  FIG. 6  may be used in combination with any second stacked film  220  illustrated in  FIG. 3 ,  FIG. 5 , and  FIG. 7 . 
       FIG. 17  is an equivalent circuit diagram of a light-emitting device  10 . In an example shown in the drawing, the light-emitting device  10  has a first terminal  112  and a second terminal  132 . The first terminal  112  is connected to the first electrode of the light-emitting unit  140  through an extraction interconnect  114 , and the second terminal  132  is connected to the second electrode of the light-emitting unit  140  through an extraction interconnect  134 . 
     When the light-emitting unit  140  of the light-emitting device  10  emits light, voltage is applied between a first extraction interconnect  114  and a second extraction interconnect  134 . Further, the first stacked film  210  is in contact with the first extraction interconnect  114  and the second extraction interconnect  134 . Moreover, the first stacked film  210  is configured of multiple stacked layers. For this reason, when shown in a equivalency circuit diagram, the first stacked film  210  is configured of a capacitor and a resistance connected in series between the first extraction interconnect  114  and the second extraction interconnect  134 . Therefore, an electric current flows into the first stacked film  210  to a certain level, and as a result, when the light-emitting unit  140  emits light, an electric charge is accumulated in the first stacked film  210 . This electric charge flows into the light-emitting unit  140  even when voltage is no longer applied between the first extraction interconnect  114  and the second extraction interconnect  134 . Due to the flowing electric charge, the response speed is decreased at turning off of the light-emitting unit  140 . Moreover, when turning on the light-emitting unit  140 , a part of the electric current flows into the first stacked film  210 . For this reason, the response speed is also decreased at turning on of the light-emitting unit  140 . 
     In contrast, according to the present embodiment, at least a part of layers in the first stacked film  210  is thicker than the other layers between the first extraction interconnect  114  and the second extraction interconnect  134 . For this reason, a resistance value in the equivalent circuit diagram of  FIG. 17  is increased. Therefore, an electric current does not easily flow into the first stacked film  210 , and as a result, the response speed of the light-emitting unit  140  is hardly decreased. When a layer of the first stacked film  210  closest to the light-emitting unit  140  is made thicker than the other layers, the electric current does not easily flow particularly into the first stacked film  210 . 
     Meanwhile, the description above also applies to the second stacked film  220 . 
     Next, a method of manufacturing the light-emitting device  10  is described. First, the substrate  100  is prepared. Then, for example, using ALD, multiple inorganic layers are formed over the first surface  102  of the substrate  100 , thus forming the first stacked film  210  over the first surface  102 . Atoms or molecules which become a film through ALD also reach the second surface  104  of the substrate  100 . In other words, ALD provides high coatability. Therefore, when forming the first stacked film  210  by ALD, the third stacked film  310  is formed on the second surface  104  of the substrate  100 . 
     Thereafter, a first electrode, an organic layer, and a second electrode of the light-emitting unit  140  are formed over the first stacked film  210  of the substrate  100  in this order, thus forming the light-emitting unit  140 . Meanwhile, terminals of the light-emitting unit  140  are also formed by the process. 
     Next, for example, multiple inorganic layers are formed both on the first stacked film  210  of the substrate  100  and on the light-emitting unit  140  by ALD, thus forming the second stacked film  220  serving as the sealing film on the first surface  102  and the light-emitting unit  140 . Also, as mentioned above, ALD provides high coatability. For this reason, when forming the second stacked film  220  by ALD, the fourth stacked film  320  is formed on the second surface  104  of the substrate  100 . 
     As explained above, according to the present embodiment, the first stacked film  210  and the second stacked film  220  are formed on the first surface  102  side of the substrate  100 , and the third stacked film  310  and the fourth stacked film  320  are formed on the second surface  104  side of the substrate  100 . The number of layers of the first stacked film  210  is the same as that of the third stacked film  310 , and materials of respective ones of the multiple layers constituting the third stacked film  310  are the same as materials of respective ones of the multiple layers of the first stacked film  210 , the layers of the third stacked film and the layers of the third stacked film corresponding in the laminating order when counted from the substrate  100  side. Further, the number of layers of the fourth stacked film  320  is the same as that the second stacked film  220 , and materials of respective ones of the plural layers constituting the fourth stacked film  320  are the same as materials of respective ones of the plural of layers of the second stacked film  220 , the layers of the fourth stacked film and the layers of the second stacked film corresponding in the laminating order when counted from the substrate  100  side. Thereby, a stress originated in the first stacked film  210  and applied to the substrate  100  is canceled by a stress originated in the third stacked film  310  and applied to the substrate  100 . Moreover, a stress originated in the second stacked film  220  and applied to the substrate  100  is canceled by a stress originated in the fourth stacked film  320  and applied to the substrate  100 . Consequently, the stress applied to the substrate  100  is reduced. 
     Particularly in the present embodiment, since the first stacked film  210  and the third stacked film  310  are formed simultaneously by ALD, configurations thereof become the same as each other. Further, since the second stacked film  220  and the fourth stacked film  320  are formed simultaneously by ALD, configurations thereof become the same as each other. Consequently, the stress applied to the substrate  100  is particularly reduced. 
     Meanwhile, since the fourth stacked film  320  functions as a barrier film of the substrate  100 , the risk of moisture permeating the substrate  100  is further reduced. 
     EXAMPLE 1 
       FIG. 8  is a plan view illustrating a configuration of a light-emitting device  10  according to Example 1. A second stacked film  220  is indicated by a dotted line in  FIG. 8  for ease of explanation.  FIG. 9  is a diagram in which a second electrode  130  and the second stacked film  220  are removed from  FIG. 8 .  FIG. 10  is a diagram in which an organic layer  120  and an insulating layer  150  are removed from  FIG. 9 .  FIG. 11  is a cross-sectional view along line A-A of  FIG. 8 . 
     In Example 1, the light-emitting device  10  is an illumination device and includes a substrate  100  and a light-emitting unit  140 . The light-emitting unit  140  includes a first electrode  110 , an organic layer  120 , and a second electrode  130 . Configurations of the first electrode  110 , the organic layer  120 , and the second electrode  130  are as described in the embodiment. 
     An edge of the first electrode  110  is covered by the insulating layer  150 . The insulating layer  150  is formed of a photosensitive resin material, for example, a polyimide or the like and surrounds a portion of the first electrode  110  serving as a light-emitting region of the light-emitting unit  140 . By providing the insulating layer  150 , it is possible to inhibit the first electrode  110  and the second electrode  130  from being short-circuited at the edge of the first electrode  110 . The insulating layer  150  is formed, for example, by coating a resin material serving as the insulating layer  150 , and then exposing and developing the resin material. 
     Moreover, the light-emitting device  10  has a first terminal  112  and a second terminal  132 . The first terminal  112  is connected to the first electrode  110 , and the second terminal  132  is connected to the second electrode  130 . The first terminal  112  and the second terminal  132  include a layer formed of the same material as that of the first electrode, for example. Meanwhile, an extraction interconnect may be provided between the first terminal  112  and the first electrode  110 . Further, an extraction interconnect may be provided between the second terminal  132  and the second electrode  130 . 
     In addition, the light-emitting device  10  has a first stacked film  210 , a second stacked film  220 , a third stacked film  310 , and a fourth stacked film  320 . Configurations of the stacked films and the substrate  100  are as described in the embodiment. 
     Next, a method of manufacturing the light-emitting device  10  is described. First, the first stacked film  210  and the third stacked film  310  are formed on the substrate  100 . Then, the first electrode  110  is formed on the first stacked film  210 , thereby also forming the first terminal  112  and the second terminal  132 . Then, the insulating layer  150 , the organic layer  120 , and the second electrode  130  are formed in this order. Thereafter, the second stacked film  220  and the fourth stacked film  320  are formed. 
     According to the present example, as is the case with the embodiment, stress applied to the substrate  100  may be reduced in the illumination device that uses the light-emitting unit  140 . 
     EXAMPLE 2 
       FIG. 12  is a plan view of a light-emitting device  10  according to Example 2. For ease of explanation, in  FIG. 12 , a second stacked film  220  is indicated by a dotted line.  FIG. 13  is a diagram in which a partition wall  170 , a second electrode  130 , an organic layer  120 , and an insulating layer  150  are removed form  FIG. 12 .  FIG. 14  is a cross-sectional view along line B-B of  FIG. 12 ,  FIG. 15  is a cross-sectional view along line C-C of  FIG. 12 , and  FIG. 16  is a cross-sectional view along line D-D of  FIG. 12 . 
     The light emitting device  10  according to the present embodiment is a display including a substrate  100 , a first electrode  110 , a light-emitting unit  140 , an insulating layer  150 , plural openings  152 , plural openings  154 , plural extraction interconnects  114 , an organic layer  120 , a second electrode  130 , plural extraction interconnects  134 , and plural partition walls  170 . 
     The first electrode  110  extends linearly in the first direction (in the Y direction in  FIG. 12 ). An end of the first electrode  110  is connected to the extraction interconnect  114 . 
     The extraction interconnect  114  is for connecting the first electrode  110  to the first terminal  112 . In an example shown in the drawing, a one end side of the extraction interconnect  114  is connected to the first electrode  110  and the other end side of the extraction interconnect  114  serves as the first terminal  112 . In the example shown in the drawing, the first electrode  110  and the extraction interconnect  114  are integral. A conductive layer  160  is formed on the extraction interconnect  114 . The conductive layer  160  is formed using a material having resistance lower than that of the first electrode  110 , and is, for example, Al. Meanwhile, the conductive layer  160  may have a multilayer structure. A part of the extraction interconnect  114  is covered by the insulating layer  150 . 
     The insulating layer  150  is, as shown in  FIG. 12 , and  FIG. 14  to  FIG. 16 , formed on plural first electrodes  110  and also in regions therebetween. Plural openings  152  and plural openings  154  are formed in the insulating layer  150 . Plural second electrodes  130  extend in parallel to each other in a direction intersecting the first electrodes  110  (for example, a direction orthogonal to X direction in  FIG. 12 ). The partition wall  170 , to be explained in detail later, extends between the plural second electrodes  130 . Specifically, the plural openings  152  are aligned in a direction in the extending direction of the first electrodes  110  (Y direction in  FIG. 12 ). Moreover, the plural openings  152  are also aligned in the extending direction of the second electrodes  130  (X direction in  FIG. 12 ). Therefore, the plural openings  152  are disposed so as to constitute a matrix. 
     The openings  154  are located in a region overlapping a one end side of each of the plural second electrodes  130  when seen in a planar view. In addition, the openings  154  are disposed along one side of the matrix constituted by the openings  152 . When seen in a direction along this one side (for example, Y direction in  FIG. 12 , that is, a direction along the first electrodes  110 ), the openings  154  are disposed at a predetermined interval. A portion of the extraction interconnects  134  are exposed from the openings  154 . The extraction interconnects  134  are connected to the second electrodes  130  through the openings  154 . 
     The extraction interconnect  134  is for connecting the second electrode  130  to the second terminal  132  and includes a layer constituted of the same material as that of the first electrode  110 . A one end side of the extraction interconnect  134  is located below the opening  154 , and the other end side of the extraction interconnect  134  is extracted to the outside of the insulating layer  150 . In an example shown in  FIG. 12 , the other end side of the extraction interconnect  134  serves as the second terminal  132 . The conductive layer  160  is formed on the extraction interconnect  134 . Meanwhile, a portion of the extraction interconnect  134  is covered by the insulating layer  150 . 
     The organic layer  120  is formed in a region overlapping the openings  152 . A hole injection layer of the organic layer  120  is in contact with the first electrode  110 , and an electron injection layer of the organic layer  120  is in contact with the second electrode  130 . Therefore, the light-emitting unit  140  is located in each region overlapping the opening  152 . 
     Meanwhile, in each of examples shown in  FIG. 14  and  FIG. 15 , each layer configuring the organic layer  120  protrudes to the outside of the opening  152 . As shown in  FIG. 12 , the organic layer  120  may or may not be continuously formed between the neighboring openings  152  in the extending direction of the partition wall  170 . However, as shown in  FIG. 16 , the organic layer  120  is not formed over the openings  154 . 
     The second electrode  130  extends in a second direction (X direction in  FIG. 12 ) intersecting the first direction as illustrated in  FIG. 12  and  FIG. 14  to  FIG. 16 . The partition wall  170  is formed between the neighboring second electrodes  130 . The partition wall  170  extends in parallel to the second electrode  130 , that is, in the second direction. The foundation of the partition wall  170  is, for example, the insulating layer  150 . The partition wall  170  is a photosensitive resin such as, for example, a polyimide-based resin and the like, formed in a predetermined pattern by undergoing exposure and development. Meanwhile, the partition wall  170  may also be constituted of a resin, for example, an epoxy resin or an acrylic resin which are not polyimide-based, or an inorganic material such as a silicon dioxide or the like. 
     The cross-sectional shape of the partition wall  170  is a trapezoid turned upside down (an inverted trapezoid). That is, the width of the upper surface of the partition wall  170  is larger than the width of the lower surface thereof. For this reason, when the partition walls  170  are formed before the second electrodes  130 , plural second electrodes  130  can be formed at one time on one surface side of the substrate  100  by vapor deposition or sputtering. Moreover, the partition walls  170  have a function of partitioning the organic layer  120 . 
     Also in the present example, the first stacked film  210  and the second stacked film  220  are formed on the first surface  102  of the substrate  100 , and the third stacked film  310  and the fourth stacked film  320  are formed on the second surface  104  of the substrate  100 . The second stacked film  220  seals the light-emitting unit  140 . Meanwhile, in the present example, the first terminal  112  and the second terminal  132  are disposed along the same side of the substrate  100 . For this reason, in the second stacked film  220 , an opening for exposing the first terminal  112  and an opening for exposing the second terminal  132  are connected to each other. 
     Next, a method of manufacturing the light-emitting device  10  in the present example is explained. First, the first stacked film  210  and the third stacked film  310  are formed on the substrate  100 . These manufacturing steps are as shown in the embodiment. 
     Next, the first electrode  110 , the extraction interconnect  114 , and the extraction interconnect  134  are formed on the first surface  102  of the substrate  100 . The conductive layer  160  is thereafter formed on the interconnect  114  and the interconnect  134 . Next, the insulating layer  150  is formed, and moreover, the partition wall  170  is formed. The organic layer  120  and the second electrode  130  are then formed. These manufacturing steps are the same as Example 1. 
     Next, the second stacked film  220  and the fourth stacked film  320  are formed over the substrate  100 . These manufacturing steps are as shown in the embodiment. 
     According to the present example, as with the embodiment, stress applied to the substrate  100  can be reduced in the display that utilizes the light-emitting unit  140 . 
     The embodiments and the examples are described above referring to the drawings, but these are examples of the present invention and various configurations other than those described above can be employed.