Patent Publication Number: US-10319943-B2

Title: Display device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 15/070,604 filed on Mar. 15, 2016. Further, this application claims priority from Japanese application JP2015-054987 filed on Mar. 18, 2015, the contents of which are hereby incorporated by reference into this application. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to a display device and a method of manufacturing the display device. 
     2. Description of the Related Art 
     In manufacturing processes for manufacturing a sheet-shaped display device, there is a process in which a resin layer is peeled off from a glass substrate by using a laser beam and so on after the resin layer such as polyimide and a self-light emitting element layer are stacked on the glass substrate. More specifically, the resin layer is peeled off from the glass substrate by ablation of a material occurring due to energy of the laser beam on a surface of the resin layer. At this time, a minute product generated by ablation may adhere to the surface of the resin layer and remain thereon. The product (hereinafter referred to also as a “residual product”) will be also a factor of reduction of yields and a factor of deterioration in display quality due to mixing of bubbles and so on in subsequent processes. 
     As a method of removing the residual product, a dry air cleaning or a wet cleaning (for example, a pure water cleaning) can be cited. When performing the wet cleaning, there is a concern that the resin layer absorbs moisture and the moisture reaches the self-light emitting element layer to cause deterioration. 
     In JP 2008-159600 A, a structure in which infiltration of moisture is prevented by surrounding a layer having a property absorbing moisture with a first and second moisture block layers. 
     However, there may be a case where the residual product adheres firmly by static electricity, and there is a concern that the residual product still remains on the surface even when using the above removal method. 
     SUMMARY OF THE INVENTION 
     An object of the present invention is to provide a method of manufacturing a display device capable of removing a residual product more effectively as compared with a case where the dry air cleaning or the wet cleaning is used. 
     According to an embodiment of the present invention, there is provided a method of manufacturing a display device including the steps of preparing a structure including a self-light emitting element layer which plural self-light emitting type pixels comprise, a first resin layer and a second resin layer sandwiching the self-light emitting element layer, a first stopper layer stacked on the first resin layer on the opposite side of the self-light emitting element layer, a first resin sacrificial layer stacked on the first stopper layer on the opposite side of the self-light emitting element layer, a first glass substrate stacked on the first resin sacrificial layer on the opposite side of the self-light emitting element layer, and a second glass substrate stacked on the second resin layer on the opposite side of the self-light emitting element layer, peeling off the first glass substrate from the first resin sacrificial layer by irradiating the first glass substrate with a laser beam and decomposing the first resin sacrificial layer by a chemical reaction using a gas, in which the first stopper layer has a resistance to the chemical reaction, and the first resin sacrificial layer is removed while leaving the first stopper layer in the step of decomposing the first resin sacrificial layer. According to the method, it is possible to remove the residual product effectively as compared with the case of using the dry air cleaning or the wet cleaning. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a display device according to an embodiment of the present invention; 
         FIG. 2  is a cross-sectional view showing an example of a configuration of the display device; 
         FIG. 3  is a schematic cross-sectional view showing a first structure as a portion of the display device in a manufacturing stage; 
         FIG. 4  is a schematic cross-sectional view showing a second structure as a portion of the display device in a manufacturing stage; 
         FIG. 5  is a schematic cross-sectional view showing the display device in a manufacturing stage; 
         FIG. 6  is a schematic cross-sectional view showing a portion of the display device in a manufacturing stage; 
         FIG. 7  is a schematic cross-sectional view showing a portion of the display device in a manufacturing stage; 
         FIG. 8  is a schematic cross-sectional view showing a portion of the display device in a manufacturing stage; 
         FIG. 9  is a schematic cross-sectional view showing a portion of the display device in a manufacturing stage; 
         FIG. 10  is a schematic cross-sectional view showing a portion of the display device in a manufacturing stage; 
         FIG. 11  is a schematic cross-sectional view showing a portion of the display device in a manufacturing stage; 
         FIG. 12  is a schematic cross-sectional view showing a portion of the display device in a manufacturing stage; 
         FIG. 13  is a schematic cross-sectional view showing a portion of the display device in a manufacturing stage; 
         FIG. 14  is a schematic cross-sectional view showing a second structure formed in a modification example; and 
         FIG. 15  is a schematic cross-sectional view showing a portion of a display device formed in the modification example. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Hereinafter, a mode for carrying out the invention (hereinafter referred to as an embodiment) will be explained. The disclosure of the specification is just an example of the present invention, and proper alternations keeping the gist of the present invention, at which those skilled in the art can easily arrive are included in the scope of the invention. The width, the thickness, the shape and so on of respective parts shown in the drawings are schematically shown, which do not limit the interpretation of the present invention. 
     1. Outer Appearance of Display Device 
       FIG. 1  is a perspective view showing an outer appearance of a display device  1  according to the embodiment of the present invention. The display device  1  formed in a sheet shape has flexibility, which is capable of display the contents of acquired image information and the like on a display area  5  formed on a surface of the display device  1  even when the display device is bent. 
     2. Configuration of Display Device 
       FIG. 2  is a cross-sectional view showing an example of a configuration of the display device  1 . As shown in the drawing, a self-light emitting element layer  50  including self-light emitting type light emitting elements is formed in the display device  1 . Here, the self-light emitting element layer  50  is a layer formed in a planar shape, having two surfaces corresponding to a surface and a rear surface. In the following description, one surface of the self-light emitting element layer  50  is referred to as a first surface and the other surface of the self-light emitting element layer  50  is referred to as a second surface. In the cross-sectional view of  FIG. 2 , an upper surface (II- 1 ) of the self-light emitting element layer  50  corresponds to the first surface and a lower surface (II- 2 ) corresponds to the second surface. 
     Also as shown in  FIG. 2 , a sealing layer  60 , a filling layer  90 , an overcoat layer  80 , a color filter layer  70 , a first barrier layer  11 , a first resin layer  10 , a first stopper layer  13  and a first repair layer  14  are stacked on the first surface&#39;s side of the self-light emitting element layer  50 , and a first protective film  15  is bonded to an outer surface of the first repair layer  14 . Also as shown in the drawing, a planarization layer  40 , a circuit layer  30 , a second barrier layer  21 , a second resin layer  20 , a second stopper layer  23  and a second repair layer  24  are stacked on the second surface&#39;s side of the self-light emitting element layer  50 , and a second protective film  25  is bonded to an outer surface of the second repair layer  24 . 
     The display device  1  according to the embodiment adopts a top emission type, which is configured to emit light from the first surface&#39;s side of the self-light emitting element layer  50 . Accordingly, the sealing layer  60 , the filling layer  90 , the overcoat layer  80 , the color filter layer  70 , the first barrier layer  11 , the first resin layer  10 , the first stopper layer  13  and the first repair layer  14  and the first protective film  15  are respectively formed of materials which transmit light (transparent materials, semitransparent materials colored by given colors or the like). 
     Here, plural self-light emitting type pixels formed by the self-light emitting element layer  50  are provided in the display area  5  of the display device  1  (see  FIG. 1 ). More specifically, the self-light emitting element layer  50  is formed by including an organic layer  53  in which a charge transfer layer, a charge injection layer, light emitting elements and so on are stacked as shown in  FIG. 2 . When electricity flows in the organic layer  53 , the self-light emitting element layer  50  emits light of pixels. 
     Also as shown in  FIG. 2 , a bank layer  51 , pixel electrodes  52  and a common electrode  54  are formed in the self-light emitting element layer  50  so as to cover a surface and a rear surface of the organic layer  53 . Here, the bank layer  51  is formed of an insulator such as a resin, which is arranged so as to surround respective outer peripheries of plural pixels. The bank layer  51  is arranged in this manner, thereby preventing contact of pixel electrodes  52  adjacent between pixels. 
     The pixel electrodes  52  are formed of a given conductive material and processed (for example, etching processing) so as to be cut off from one another in respective pixels. When the top emission type is adopted as in the embodiment, the pixel electrodes  52  may include a material which reflects light such as metals (for example, Ag). The common electrode  54  is formed of ITO (Indium Tin Oxide) or IZO (indium zinc oxide), however, materials are not limited to them as long as they are transparent conductive materials. The organic layer  53  and the common electrode  54  may be arranged over the entire pixels in the display area  5 . 
     Also as shown in  FIG. 2 , the planarization layer  40  and the circuit layer  30  are stacked on the second surface&#39;s side of the self-light emitting element layer  50 . Here, the planarization layer  40  is formed of an insulator such as a resin, and has holes formed at positions contacting parts of a later-described drive wiring  32 . Part of the pixel electrode  52  enters the hole and contacts the drive wiring  32 . 
     The circuit layer  30  is formed by including circuit portions  31  for controlling image display in the display area  5 . The circuit portion  31  includes a TFT (thin-film transistor) and a capacitance, controlling the supply of electric current with respect to the pixel electrode  52 . More specifically, when the drive TFTs included in the circuit portions  31  are turned on, the electric current flows in the drive wiring  32  connected to the drive TFTs, the pixel electrodes  52 , the organic layer  53 , and the common electrode  54  which are electrically connected to the drive wiring  32  to thereby emit light of pixels from the organic layer  53 . 
     Furthermore, as shown in  FIG. 2 , the color filter layer  70  is formed on the first surface&#39;s side of the self-light emitting element layer  50 . Here, the color filter layer  70  is formed by including color filters  71 R,  71 G and  71 B which are red, green and blue and are respectively transmit light. Here, when light emitted from the organic layer  53  is transmitted through the above color filters  71 R,  71 G and  71 B, light corresponding to a color of a pixel is emitted. 
     Also as shown in  FIG. 2 , the sealing layer  60 , the filling layer  90  and the overcoat layer  80  are stacked between the self-light emitting element layer  50  and the color filter layer  70 . The sealing layer  60  is formed of SiO or SiN, having a function of protecting the self-light emitting element layer  50  from moisture included in the filling layer  90 . The overcoat layer  80  is formed of, for example, an organic material, having a function of preventing diffusion of dyes of colors included in the color filters  71 R,  71 G and  71 B. The details of the filling layer  90  will be described later. 
     Also as shown as  FIG. 2 , the first resin layer  10  is formed on the first surface&#39;s side of the self-light emitting element layer  50  and the second resin layer  20  is formed on the second surface&#39;s side of the self-light emitting element layer  50  in the display device  1 . The first resin layer  10  and the second resin layer  20  have flexibility and allow bending in a vertical direction in the cross section of  FIG. 2  and stretching in a direction along the surface of the display device  1  to some degree. The material for the first resin layer  10  and the second resin layer  20  may be polyimide, however, it is not limited to this as long as materials have flexibility and transmit light when used for the first resin layer  10 . The second resin layer  20  may be formed to be opaque if it is not necessary to transmit light from the self-light emitting element layer  50  or from the back of the display device  1 . 
     Also as shown as  FIG. 2 , the first barrier layer  11  is formed between the first resin layer  10  and the color filter layer  70 , and the second barrier layer  21  is formed between the second resin layer  20  and the circuit layer  30 . The first barrier layer  11  and the second barrier layer  21  are for preventing infiltration of moisture and impurities to the self-light emitting element layer  50 , the circuit layer  30  and so on, which are formed by stacking, for example, SiO and SiN. 
     Also as shown as  FIG. 2 , the first stopper layer  13  and the second stopper layer  23 , the first repair layer  14  and the second repair layer  24 , the first protective film  15  and the second protective film  25  are respectively stacked in the display device  1 . The first protective film  15  and the second protective film  25  are layers for protecting layers inside these films from scratches and stains. The first protective film  15  and the second protective film  25  are formed by using, for example, PET as a material, having adhesion layers (not shown) for adhering to respective surfaces of the first stopper layer  13  and the second stopper layer  23 . The first stopper layer  13 , the second stopper layer  23 , the first repair layer  14  and the second repair layer  24  will be explained later. 
     3. Method of Manufacturing Display Device 
     Here, a method of manufacturing the display device  1  according to the embodiment will be explained with reference to  FIG. 3  to  FIG. 9 . 
       FIG. 3  is a schematic cross-sectional view showing a first structure as a portion of the display device  1  in a manufacturing stage. As shown in  FIG. 3 , a first structure  100  in which a first resin sacrificial layer  102 , the first stopper layer  13 , the first resin layer  10 , the first barrier layer  11 , the color filter layer  70  and the overcoat layer  80  are stacked in this order on a first glass substrate  101  is prepared in a manufacturing process of the display device  1 . 
     Here, the first resin sacrificial layer  102  is a layer decomposed and removed from the first stopper layer  13  in a subsequent process for preventing adverse effects to the first resin layer  10  at the time of peeling off the first glass substrate  101  and for removing a residual product  105  adhering at that time. The first resin sacrificial layer  102  is formed by using polyimide as a material in the same manner as the first resin layer  10  as an example. In this case, the first resin sacrificial layer  102  may be formed by a method of applying a solution of polyimide on the first glass substrate  101  and baking and hardening the solution by baking treatment, and the first resin sacrificial layer  102  may also be formed by adhering a film sheet of polyimide to the first glass substrate  101 . 
     The first stopper layer  13  has a function of protecting the first resin layer  10  when the first resin scarifying layer  102  is decomposed in the subsequent process. As materials for the first stopper layer  13 , SiO, SiN, ITO, IZO, Al 2 O 3  and so on can be cited. The first stopper layer  13  may be formed by including SiO or SiN by using a CVD method, may be formed by including ITO or IZO by a using sputtering method, and may be formed by using Al 2 O 3  by using an ALD (Atomic layer deposition) method. The first stopper layer  13  is formed to be transparent so as to transmit light of pixels emitted from the self-light emitting element layer  50 . 
       FIG. 4  is a schematic cross-sectional view showing a second structure as a portion of the display device  1  in a manufacturing stage. As shown in  FIG. 4 , a second structure  200  in which a second resin sacrificial layer  202 , the second stopper layer  23 , the second resin layer  20 , the second barrier layer  21 , the circuit layer  30 , the planarization layer  40 , the self-light emitting element layer  50  and the sealing layer  60  are stacked in this order on a second glass substrate  201  is prepared in a manufacturing process of the display device  1 . 
     Here, the second resin sacrificial layer  202  is a layer decomposed and removed from the second stopper layer  23  in a subsequent process for preventing adverse effects to the second resin layer  20  at the time of peeling off the second glass substrate  201  and for removing a residual product  205  adhering at that time. The second resin sacrificial layer  202  is formed by using polyimide as a material as an example in the same manner as the second resin layer  20 , the first resin layer  10  and the first resin sacrificial layer  102 . 
     The second stopper layer  23  has a function of protecting the second resin layer  20  when the second resin scarifying layer  202  is decomposed in the subsequent process. The second stopper layer  23  may be formed by using, for example, SiO, SiN, ITO, IZO, Al 2 O 3  and so on as materials in the same manner as the first stopper layer  13 . The second stopper layer  23  may be formed to be opaque. 
       FIG. 5  shows the display device  1  in a manufacturing stage, which is a schematic cross-sectional view showing a structure in which the first structure  100  and the second structure  200  are bonded to each other through the filling layer  90 . The filling layer  90  is formed by including a transparent filler and a seal material  91  functioning as a dam for the filler. In a manufacturing process of the display device  1 , the filling layer  90  is arranged on the second structure  200  shown in  FIG. 4 , and the first structure  100  shown in  FIG. 3  is bonded thereto by turning over the first structure  100  shown in  FIG. 3  in the vertical direction, thereby forming one structure as the display device  1 . 
     As described above, in the manufacturing process of the display device  1  according to the embodiment, the structure including the self-light emitting element layer  50 , the first resin layer  10  and the second resin layer  20  sandwiching the self-light emitting element layer  50 , the first stopper layer  13  stacked on the first resin layer  10  on the opposite side of the self-light emitting element layer  50 , the first resin sacrificial layer  102  staked on the first stopper layer  13  on the opposite side of the self-light emitting element layer  50 , the first glass substrate  101  staked on the first resin sacrificial layer  102  on the opposite side of the self-light emitting element layer  50  and the second glass substrate  201  staked on the second resin layer  20  on the opposite side of the self-light emitting element layer  50  is prepared. The structure further includes the second stopper layer  23  staked on the second resin layer  20  on the opposite side of the self-light emitting element layer  50  and the second resin sacrificial layer  202  staked on the second stopper layer  23  on the opposite side of the self-light emitting element layer  50 , and the second glass substrate  201  is staked on the second resin sacrificial layer  202  on the opposite side of the self-light emitting element layer  50 . The structure further includes the color filter layer  70  interposed between the self-light emitting element layer  50  and the first resin layer  10  and the circuit layer  30  interposed between the self-light emitting element layer  50  and the second resin layer  20 . 
       FIG. 6  is a schematic cross-sectional view showing a portion of the display device  1  in a manufacturing stage, which is a view showing an example of a stage where the first glass substrate  101  is peeled off from the display device  1 . In the manufacturing process of the display device  1 , the first glass substrate  101  is irradiated with a laser beam  300  to change a property of a contact surface of the first resin sacrificial layer  102  contacting the first glass substrate  101  by heat, thereby peeling off the first glass substrate  101  from the first resin sacrificial layer  102 . That is, ablation due to the layer beam  300  occurs on the surface of the first resin sacrificial layer  102 , the first resin sacrificial layer  102  is peeled off from the first glass substrate  101 . 
     As the first resin sacrificial layer  102  is further stacked on the first resin layer  10  in the manufacturing method according to the embodiment, the thickness of the resin layer can be increased at the time of irradiation of the laser beam  300  as compared with a related-art method in which only the first resin layer  10  is stacked. Therefore, the adverse effects (damage to the self-light emitting element layer  50  and so on) to the self-light emitting element layer  50  due to laser energy of the laser beam  300  can be reduced. 
     Here, the minute residual product  105  mainly containing carbon is generated on a surface of the first resin sacrificial layer  102  by the ablation due to the laser beam  300 . The residual product  105  adheres to the surface of the first resin sacrificial layer  102  at the time of peeling off the first glass substrate  101 . 
     Incidentally, in the case where the protective film is bonded to the surface in a state where the residual product  105  adheres to the surface, bubbles easily enter the inside of the protective film due to the influence of the residual product  105 , which will be a factor of reducing yields. Accordingly, it is necessary to remove the residual product  105  from the surface of the display device  1 , however, most of the residual products  105  have sizes smaller than 1 μm, and may adhere firmly by static electricity. Therefore, the residual product  105  may still remain on the surface of the display device  1  even when a dry air cleaning or a wet cleaning is used. 
     When irradiation of the laser beam  300  is performed in a state where there is a foreign matter on the first resin sacrificial layer  102 , the first resin sacrificial layer  102  is chipped as the foreign matter is burned or sublimes, which causes the reduction of yields in subsequent processes. 
     Accordingly, in the manufacturing process of the display device  1 , the residual product  105  is removed together with the first resin sacrificial layer  102  by decomposing the first resin sacrificial layer  102  by a chemical reaction using a gas containing oxygen, fluorine or the like. 
       FIG. 7  is a schematic cross-sectional view showing a portion of the display device  1  in a manufacturing stage, which is a view showing an example of a stage in which the first resin sacrificial layer  102  is removed from the portion of the display device  1  shown in  FIG. 6 . As shown in  FIG. 7 , the first resin sacrificial layer  102  is decomposed into an organic compound  106 , for example, by performing processing (dry etching) in which gas containing oxygen or fluorine is converted into plasma by high frequency and a generated plasma  400  is applied to the first resin sacrificial layer  102  to be chemically reacted. 
     Though the first resin sacrificial layer  102  is decomposed by the above chemical reaction, the first stopper layer  13  has a resistance to the chemical reaction, and the first stopper layer  13  is not decomposed and remains in the above process. In the manufacturing process of the display device  1 , the first resin sacrificial layer  102  is removed together with the residual product  105  while leaving the first stopper layer  13 . According to this process, the residual product  105  does not remain on the surface of the first stopper layer  13  and progress of the chemical reaction to the first resin layer  10  is suppressed, therefore, the reduction of yields in subsequent processes can be prevented. 
       FIG. 8  is a schematic cross-sectional view showing a portion of the display device  1  in a manufacturing stage, which is a view showing an example in which the portion of the display device  1  shown in  FIG. 7  is enlarged. As sown in  FIG. 8 , a chipped portion (hereinafter also referred to as a first pinhole  107 ) may be generated in the first stopper  13 . The first pinhole  107  is generated in a stage of forming the first stopper layer  13  by the CVD method or generated when a foreign matter mixed in the first stopper layer  13  reacts with the plasma  400  in the chemical reaction processing (for example, dry etching) at the time of removing the first resin sacrificial layer  102 . In the case where the first protective film  15  is bonded to the first stopper layer  13  in a state where the first pinhole  107  remains in the above manner, moisture remaining in the first protective film  15  or moisture infiltrated from the outside thereof reaches the first resin layer  10 , which leads to deterioration. 
     Accordingly, in the manufacturing process of the display device  1 , the first repair layer  14  is formed over the first stopper layer  13  after the process of decomposing the first resin sacrificial layer  102 , and the first protective film  15  is bonded to a surface of the first repair layer  14 . 
       FIG. 9  is a schematic cross-sectional view showing a portion of the display device  1  in a manufacturing stage, which is a view showing an example in which the first repair layer  14  and the first protective film  15  are formed in the display device  1  shown in  FIG. 8 . As shown in  FIG. 9 , the first repair layer  14  is provided so as to bury the first pinhole  107  in the first stopper layer  13 . The first repair layer  14  may have a single-layer structure including SiO, SiN, acrylic, PET, a fluorine resin or the like, a stacked-layer structure including Al 2 O 3  and SiO (or SiN), a stacked-layer structure including acrylic and SiO (or SiN) or the like. When the first repair layer  14  is provided between the first stopper layer  13  and the first protective film  15 , it is possible to improve an ability of blocking moisture infiltrated through the first protective film  15 . 
       FIG. 10  is a schematic cross-sectional view showing a portion of the display device  1  in a manufacturing stage, which is a view showing a state in which the second glass substrate  201  is peeled off from the display device  1 . In the manufacturing process of the display device  1 , the second glass substrate  201  stacked on the second surface&#39;s side of the self-light emitting element layer  50  is irradiated with the laser beam  300  after the first protective film  15  is bonded, a property of a contact surface of the second resin sacrificial layer  202  contacting the second glass substrate  201  is changed by heat, thereby peeling off the second glass substrate  201  from the second resin sacrificial layer  202 . Also in this case, the minute residual product  205  is generated on the contact surface of the second resin sacrificial layer  202  and adheres to the surface of the second resin sacrificial layer  202  in the same manner as in the case of peeling off the first glass substrate  101 . 
       FIG. 11  is a schematic cross-sectional view showing a portion of the display device  1  in a manufacturing stage, which is a view showing a state where the second sacrificial layer  202  is removed from the portion of the display device  1  shown in  FIG. 10 . In the manufacturing process of the display device  1 , the residual product  205  is removed from the surface of the display device  1  in the forming stage by decomposing the second resin sacrificial layer  202  into an organic compound  206  by the chemical reaction (dry etching) using the gas containing oxygen or fluorine. Here, the second stopper layer  23  may be formed by the same material and method as the first stopper layer  13 , and the second stopper layer  23  has a resistance to the chemical reaction using the gas. Accordingly, the second resin sacrificial layer  202  is removed while leaving the second stopper layer  23  by using the chemical reaction such as dry etching in the present process. As the residual product  205  is removed together with the second resin sacrificial layer  202  also in the second surface&#39;s side of the self-light emitting element layer  50  and the progress of the chemical reaction to the second resin layer  20  is suppressed as described above, the reduction of yields in subsequent processes can be prevented. 
       FIG. 12  is a schematic cross-sectional view showing a portion of the display device  1  in a manufacturing stage, which is a view showing an example in which the portion of the display device  1  shown in  FIG. 11  is enlarged. As shown in  FIG. 12 , a chipped portion (hereinafter also referred to as a second pinhole  207 ) may occur in the second stopper  23  due to mixing of a foreign matter in the process of decomposing the second resin sacrificial layer  202 . 
     Accordingly, in the manufacturing process of the display device  1 , the second repair layer  24  is formed over the second stopper layer  23  after the process of decomposing the second resin sacrificial layer  202 , and the second protective film  25  is bonded to a surface of the second repair layer  24 . 
       FIG. 13  is a schematic cross-sectional view showing a portion of the display device  1  in a manufacturing stage, which is a view showing an example in which the second repair layer  24  and the second protective film  25  are formed in the display device  1  shown in  FIG. 12 . As shown in  FIG. 13 , the second repair layer  24  is provided so as to bury the second pinhole  207  in the second stopper layer  23 , namely, so as to repair the defect of the second repair layer  24 . The second repair layer  24  may be formed of the same materials as the first repair layer  14  and by the same method as the first repair layer  14 . When the second repair layer  24  is provided between the second stopper layer  23  and the second protective film  25 , it is possible to improve an ability of blocking moisture infiltrated through the second protective film  25  also on the second surface&#39;s side. 
     4. Modification Examples 
     The present invention is not limited to the above explained embodiment and may be modified in various ways. Hereinafter, examples of other modes for carrying out the present invention (modification examples) will be explained. 
     (1) In the embodiment, the method of manufacturing the display device  1  which has steps of forming the first resin sacrificial layer  102  and the second resin sacrificial layer  202  on the surface side and the rear surface side of the display device  1  respectively and removing these layers by the chemical processing to thereby remove the residual product  105  has been explained. However, light of pixels emitted from the self-light emitting element layer  50  is transmitted through the first resin layer  10  and outputted from a surface on one side of the display device  1 , therefore, if bubbles are mixed to the surface of the second resin layer  20 , the display of images is hardly affected. Accordingly, remanence of the residual product generated at the time of peeling off the glass substrate is allowed on the second surface&#39;s side in the display device  1  in the modification example. 
       FIG. 14  is a schematic cross-sectional view showing a second structure formed in the modification example. As shown in  FIG. 14 , in the second structure ( 200 - 2 ) according to the modification example, the second stopper layer  23  and the second resin sacrificial layer  202  (refer to  FIG. 4 ) are not formed and a second resin layer ( 20 - 2 ) is stacked so as to contact a glass substrate ( 201 - 2 ). The second structure ( 200 - 2 ) is bonded to the first structure (see  FIG. 3 ) which is the same as the embodiment to form one structure to be a base of a display device ( 1 - 2 ). 
     Also in the manufacturing process of the display device ( 1 - 2 : see  FIG. 15 ) according to the modification example, the glass substrate ( 201 - 2 ) is peeled off from the second resin layer ( 20 - 2 ) by irradiation of the laser beam. At this time, ablation occurs on a contact surface of the second resin layer ( 20 - 2 ), and a residual product ( 205 - 2 ) (not shown) is generated in the same manner as the embodiment and adheres to the surface of the second resin layer ( 20 - 2 ). 
       FIG. 15  is a schematic cross-sectional view showing a portion of the display device ( 1 - 2 ) formed in the modification example. As shown in  FIG. 15 , a second protective film ( 25 - 2 ) is bonded in a state where the residual product ( 205 - 2 ) adheres to the surface of the second resin layer ( 20 - 2 ). The risk in which bubbles enter the inside of the second protective film ( 25 - 2 ) is increased by the above processing, the process of forming the second stopper layer  23  and the second resin sacrificial layer  202  and the process of removing the second resin sacrificial layer  202  performed in the embodiment can be omitted, therefore, it is possible to manufacture the display device simply and inexpensively as compared with the embodiment. 
     (2) In the embodiment, the case where the sealing layer  60 , the filling layer  90 , the overcoat layer  80 , the color filter layer  70 , the second barrier layer  21 , the second resin layer  20 , the second stopper layer  23 , the second repair layer  24  and the second protective film  25  are formed of materials which transmit light (transparent materials, semitransparent materials colored to given colors and so on) which are arranged on the second surface&#39;s side for emitting light of pixels from the second surface&#39;s side of the self-light emitting element layer  50  in the display device  1  has been explained. However, members other than the above may be transparent for allowing light incident from the back of the display device  1  to be transmitted therethrough. That is, the planarization layer  40 , the circuit layer  30 , the second barrier layer  21 , the second resin layer  20 , the second stopper layer  23 , the second repair layer  24 , the second protective film  25  may be respectively formed of transparent or semitransparent materials for allowing light from the back to be transmitted therethrough. 
     While there have been described what are at present considered to be certain embodiments of the invention, it will be understood that various modifications may be made thereto, and it is intended that the appended claim cover all such modifications as fall within the true spirit and scope of the invention.