Abstract:
A manufacturing method of an organic electroluminescence display device including a device substrate provided with a plurality of pixel electrodes which have a gap part therebetween, a common electrode disposed opposite to the plurality of pixel electrodes, a light emitting layer provided over the plurality of pixel electrodes, and a bank layer provided in the gap part of the plurality of pixel electrodes, the method comprising forming a cover layer including a concave region to fit into a convex shaped part of the bank layer at a support substrate, forming a color filter layer facing the pixel electrode to the concave region, disposing a surface of the color filter layer on the device substrate so that the concave region fits into a convex shaped part, and attaching the cover layer and the color filter layer on the device substrate by peeling the cover layer from the support substrate.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2014-057990, filed on Mar. 20, 2014, the entire contents of which are incorporated herein by reference. 
     FIELD 
     The present invention is related to a structure of a pixel region in an electroluminescence display device. 
     BACKGROUND 
     Although high functionality electronic terminal devices represented by smartphones or tablets have a small screen size compared to televisions or personal computer monitors, high definition screens with a pixel density of 300 ppi are progressing. The light emitted from each pixel is split into red (R), green (G) and blue (B) and in what is called a color-separation type organic electroluminescence display device, it is difficult to separate colors of a light emitting layer for each pixel by miniaturizing pixels and reducing the pixel pitch. As a result, in a color-separation method for splitting light emitting layers of an organic electroluminescence device for each color emitted, it has been pointed out that high resolution of a pixel is difficult. A light emitting layer of an organic electroluminescence device is generally formed using a vapor deposition method or printing method and it is thought that because an organic material for forming the light emitting layer is weak to chemical solvents, this is one cause of it not being suitable for miniaturization processing by photolithography. 
     However, because an organic electroluminescence display device combining an organic electroluminescence device which appears to emit white light artificially across a wide band of the visible light emitting spectrum does not require splitting light emitting layers for each pixel, it is thought to be advantageous for achieving high resolution. That is, in the case where an organic electroluminescence device emits white light, it is sufficient to create the organic electroluminescence device using the same layer manufacturing process for the same surface of a pixel region and because the light which is emitted from each pixel can be adjusted just be using a color filter, it is easier to achieve miniaturization of a pixel during manufacture. 
     An organic electroluminescence display device in which a color adjustment layer is provided using a transfer printing method (laser transfer printing method) on the light emitting surface of an organic electroluminescence device is disclosed in Japanese Laid Open Patent No. 2007-149693 as an example of combining a white light emitting organic electroluminescence device and a color filter. A method of printing a transfer layer by arranging a plurality of color filters onto an intermediate transfer sheet, heating the transfer layer using a thermal head and transferring to a transparent substrate is disclosed in Japanese Laid Open Patent No. 2007-033928. 
     SUMMARY 
     According to one embodiment of the present invention, a manufacturing method of an organic electroluminescence display device including a device substrate provided with a plurality of pixel electrodes which have a gap part therebetween, a common electrode disposed opposite to the plurality of pixel electrodes, A light emitting layer provided between the common electrode and the plurality of pixel electrodes, a bank layer protruding from the pixel electrode in the gap part of the plurality of pixel electrodes, the method comprising forming a cover layer including a concave region to fit into a convex shaped part of the bank layer at a support substrate, forming a color filter layer from a region of the cover layer facing the pixel electrode to the concave region, disposing a surface of the color filter layer of the support substrate on the device substrate so that the concave region fits into a convex shaped part, and attaching the cover layer and the color filter layer on the device substrate by peeling the cover layer from the support substrate. 
     According to one embodiment of the present invention, an organic electroluminescence display device is provide including a substrate provided with a plurality of pixels, a plurality of pixel electrodes formed on the substrate, each of the pixel electrodes being formed in each of the pixels, a bank layer located in an gap part between the plurality of pixels and exposing the pixel electrode, a light emitting layer located on an opposite side to the substrate of the pixel electrode, a common electrode located on an opposite side to the substrate of the light emitting layer and provided over the plurality of pixels and the bank layer, a color filter layer located on an opposite side to the substrate of the common electrode and provided over the bank layer and one of the plurality of pixels, and a cover layer located on an opposite side to the substrate of the color filter and provided over the plurality of pixels and the bank layer. 
     According to one embodiment of the present invention, an organic electroluminescence display device is provided including a substrate provided with a plurality of pixels, a plurality of pixel electrodes formed on the substrate, each of the pixel electrodes being formed in each of the pixels, a bank layer positioned in an gap part between the plurality of pixels and exposing the pixel electrode, a light emitting layer positioned on an opposite side to the substrate of the pixel electrode, a common electrode positioned on an opposite side to the substrate of the light emitting layer and provided over the plurality of pixels and the bank layer, and a color filter layer positioned on an opposite side to the substrate of the common electrode and provided over the bank layer and one of the plurality of pixels, wherein each of the plurality of pixel electrodes includes an exposure area exposed by the bank layer, and the color filter layer includes a convex part protruding towards the substrate at a position facing the exposure area. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a cross-sectional diagram showing a structure of an organic electroluminescence display device related to one embodiment of the present invention; 
         FIG. 2A ˜ 2 C are cross-sectional diagrams explaining a manufacturing process of an organic electroluminescence display device related to one embodiment of the present invention; 
         FIG. 3  is a cross-sectional diagram explaining a manufacturing process of an organic electroluminescence display device related to one embodiment of the present invention; 
         FIG. 4  is a diagram explaining the structure of a manufacturing device related to one embodiment of the present invention; 
         FIG. 5A  is a perspective view diagram explaining the structure of a manufacturing device related to one embodiment of the present invention; 
         FIG. 5B  is a cross-sectional diagram explaining the structure of a manufacturing device related to one embodiment of the present invention; 
         FIG. 6  is a perspective view diagram explaining a manufacturing process of an organic electroluminescence display device related to one embodiment of the present invention; 
         FIG. 7  is a cross-sectional diagram explaining a manufacturing process of an organic electroluminescence display device related to one embodiment of the present invention; 
         FIG. 8  is a cross-sectional diagram explaining a manufacturing process of an organic electroluminescence display device related to one embodiment of the present invention; 
         FIG. 9  is a cross-sectional diagram explaining a manufacturing process of an organic electroluminescence display device related to one embodiment of the present invention; and 
         FIG. 10  is a cross-sectional diagram showing the structure of an organic electroluminescence display device related to one embodiment of the present invention. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     The embodiments of the present invention are explained below while referring to the diagrams. However, the present invention can be realized by various different forms and should not be interpreted as being limited to the contents described in the embodiments exemplified below. In addition, although the width, thickness and shape of each part are sometimes displayed schematically compared to the actual form in the diagrams in order to clarify the explanation, these are just examples and should not limit the interpretation of the present invention. In addition, in the present specification and diagrams, the same symbols are applied to the same elements described previously in the diagrams and a detailed explanation is sometimes omitted where appropriate. 
     An organic electroluminescence display device includes excellent visual angle characteristics compared to a liquid crystal display device. However, when the distance between an organic electroluminescence device (light emitting part) and color filter layer is separate, a problem occurs where the visual angle characteristics drop. That is, the more the display screen is seen from a frontal angle, the greater the deterioration in tone, brightness and contrast. Although there are various causes of this deterioration, it is thought that mixed colors due to light leaking to an adjacent pixel from a light emitting pixel is one cause. When a pixel is miniaturized, because the interval between adjacent pixels becomes narrower, the problem of mixed colors becomes more apparent. 
     An organic electroluminescence display device is provided with an insulation layer called a bank layer which encloses a pixel electrode in a pixel region. The bank layer covers a contact between a periphery end part of a pixel electrode and a wire, the remaining area of the pixel area is open and the bank layer protrudes from that pixel electrode. As a result, it is difficult to create a color filter along concave-convex shaped surface of the bank layer using the thermal transfer method disclosed in Japanese Laid Open Patent No. 2007-033928. The organic electroluminescence display device disclosed in Japanese Laid Open Patent No. 2007-149693 is created with color filter using a laser thermal transfer method. In addition, the color filter layer is formed above a protection film which is planarized and concave-convex parts are buried via the bank layer. 
     However, in a structure in which a color filter is provided above a protection film including a thickness sufficient to bury a bank layer, there is a limit to bringing the color filter layer and an organic electroluminescence close together. This is because a planarized protection film which is buried with a bank layer requires a thickness more than the height of which the bank layer protrudes. Consequently, according to the conventional technology, even when attempting to make the interval between a color filter layer and organic electroluminescence device narrower, there is a problem whereby the surface can not be brought closer than the thickness of the planarized protection film. 
     Eventually, in the case where the interval between a color filter layer and a white light organic electroluminescence device is wide, since light leaking from a light emitting pixel to an adjacent pixel and mixed colors as a result can not be ignored, there is a problem in an organic electroluminescence display device with this structure whereby there is a limit to how much the visual angle characteristics can be improved. Since this problem becomes more apparent the greater the resolution and the more the pixel size are reduced, it is important to solve this problem. 
     An organic electroluminescence display device in which visual angle characteristics can be improved is explained below as one embodiment of the present invention. 
     First Embodiment 
     Organic Electroluminescence Display Device 
     The structure of an organic electroluminescence display device  100  related to one embodiment of the present invention is shown in  FIG. 1 . The organic electroluminescence display device  100  exemplified in  FIG. 1  is provided with an organic electroluminescence device  102  which emits white light in each pixel and a color filter with a different transmission spectrum is provided in each pixel. 
     In  FIG. 1 , pixel  101   r  is a red (R) pixel and an organic electroluminescence device  102  and a red color filter layer  112   r  are combined. Similarly, an organic electroluminescence device  102  and a green color filter layer  112   g  are combined in a green (G) pixel  101   g , and an organic electroluminescence device  102  and a blue color filter layer  112   b  are combined in a blue (B) pixel  101   b . Furthermore, a color filter layer does not have to be provided or a white (W) pixel  101   w  provided with a gradation layer with a wide transmission band may also be provided. 
     An organic electroluminescence device  102  includes a structure in which a pixel electrode  104 , organic electroluminescence layer  106  and common electrode  108  are stacked. A pixel electrode  104  is provided in each pixel and is connected to a transistor  105  which controls the light emitted from a pixel. An organic electroluminescence layer  106  and common electrode  108  are provided in common across a plurality of pixels. Furthermore, it is preferred a sealing layer  116  which is formed from an insulation material such as silicon nitride is provided above the organic electroluminescence device  102 . A bank layer  114  is provided so as to cover a periphery end part of the pixel electrode  104  and is provided so as to bury the interval between adjacent pixel electrodes. 
     In the present embodiment, there is no particular limitation to the structure of the organic electroluminescence layer  106 . The organic electroluminescence layer  106  can be formed using either a low molecular or high molecular organic material. For example, in the case where a low molecular organic material is used for the organic electroluminescence layer  106 , in addition to a light emitting layer including an organic material with light emitting properties, a carrier transport layer such as a hole transport layer or electron transport layer may be added so as sandwich the light emitting layers. In the present embodiment, the organic electroluminescence device  102  is applied with a white light emitting device which emits light in a wide band in the visible frequency range. The white light emitting organic electroluminescence device  102  has a structure including a light emitting layer which emits each color red (R), green (G) and blue (B) in the organic electroluminescence layer  106 . Alternatively, it is possible to emit white light by adopting a structure including a light emitting layer which emits blue (b) and yellow (Y). 
     In the organic electroluminescence device  102 , the organic electroluminescence layer  106 , common electrode  108  and sealing film  116  are provided with a thickness of about 100 nanometers to a few hundred nanometers. For example, the organic electroluminescence layer  106  has a thickness of about 100 nm. However, the bank layer  114  is provided with a thickness from 1 micrometer to 2 micrometers or more. The organic electroluminescence layer  106 , common electrode  108  and sealing film  116  are provided along a side wall surface and upper surface of the bank layer  114  from the upper surface of the pixel electrode  104 . Since the thickness of the organic electroluminescence layer  106 , common electrode  108  and sealing film  116  together does not add up to 1 micrometer, a pixel region in which the organic electroluminescence  102  is provided includes a concave-convex formed surface shape reflecting the shape of the bank layer. 
     The red color filter layer  112   r  is provided along a concave-convex shaped surface formed by the bank layer  114 . That is, the red color filter layer  112   r  is provided along a step structure from an upper part of the pixel electrode  104  not provided with the bank layer  114  to the upper surface of the bank layer  114 . Although the organic electroluminescence layer  106 , common electrode  108  and sealing film  116  are stacked above the pixel electrode  104  and bank layer  114 , it is preferred that the red color filter layer  112   r  is provided so at least one part contacts the sealing film  116 . In the case where the sealing film  116  is omitted, at least one contacts the common electrode  108 . Furthermore, the green color filter layer  112   g  and blue color filter layer  112   b  are the same. 
     Although  FIG. 1  shows a structure in which a red color pixel  101   r , green color pixel  101   g  and blue color pixel  101   b  are aligned, in the case where color filter layers having different transmission spectrums are provided adjacent to each other, it is preferred that pairs of adjacent color filters are stacked in an upper region of the bank layer  114 . In  FIG. 1 , in the case where the red color filter  101   r  and green color filter  101   g  are adjacent, the red color filter layer  112   r  and green color filter layer  112   g  are shown as overlapping in a region which includes the bank layer  114 . Similarly, a structure is shown in which the green color filter layer  112   g  and the blue color filter layer  112   b  are stacked in a region in which the green color pixel  101   g  and blue color pixel  101   b  are adjacent. 
     In this way, because the band of visible light which passes through this stacked layer region becomes narrow by overlapping color filter layers with different transmission spectrums, it is possible to reveal the function of a light blocking film. That is, because the light transmission ratio off a stacked color filter region becomes smaller by overlapping two or more color filter layers with different transmission spectrums, it is possible to reveal a similar function as a light blocking film. In other words, it is possible to omit a light blocking film by overlapping two or more color filter layers with different transmission spectrums. 
     A cover layer  110  is provided above the color filters  112   r ,  112   g  and  112   b . The cover layer  110  is provided so that a step is buried in the color filter layers  112   r ,  112   g  and  112   g  and the surface is roughly flat. For example, although a concave-convex shape is emphasized because a region in which the red color filter layer  112   r  and green color filter layer  112   g  are stacked above the bank layer  114  has a thickness of two color filter layers, the cover layer  110  has a different thickness above the pixel electrode  104  and above the bank layer  114  and the surface of the cover layer  110  is formed so as to be flatter than the surface of a color filter layer. 
     The cover layer  110  has a function for protecting the surface of the organic electroluminescence display device. In addition, a function for burying the color filter layers  112   r ,  112   g  and  112   b  formed along the concave-convex surface formed by the bank layer  114  so that the surface of the pixel region is planarized is also provided. 
     The organic electroluminescence display device related to one embodiment of the present invention can reduce the interval between the color filter layers  112   r ,  112   g ,  112   b  and the organic electroluminescence device  102  by bringing them closer together. That is, because a space or filler material or a few micrometers or more is not present between the organic electroluminescence device and color filter layer, it is possible to narrow the interval between a device substrate and opposing substrate (cover layer). In this way, it is possible to reduce the thickness of the organic electroluminescence display device. 
     In this way, according to one embodiment of the present invention, it is possible to significantly reduce light leaking to an adjacent pixel by bring an organic electroluminescence device and cover layer closer together. Therefore, it is possible to solve the problem of mixed colors between adjacent pixels or between close pixels and improve visual angle characteristics. 
     Furthermore, it is possible to effectively use light emitted by an organic electroluminescence device by providing the cover layer  110  with a dispersion component. In addition, it is possible to provide external light reflection prevention effects by providing the cover layer  110  with a circular polarization plate function. 
     (Manufacturing Method of an Organic Electroluminescence Display Device) 
     Next, an example of a manufacturing method of this type of organic electroluminescence display device is explained using  FIG. 2A  to  FIG. 2C  and  FIG. 3 . 
     As is shown in  FIG. 2A , a resin layer  109  is formed above a support substrate  120 . Since the resin layer  109  is positioned on the side in which light is emitted from a pixel in the organic electroluminescence display device, it is preferred that a resin material is formed with translucency properties. Although the support substrate  120  is a hard substrate such as glass, a flexible thin material may be used such as a plastic film. In addition, a peeling layer  122  for peeling the resin layer formed in a later process from the support substrate  120  may be provided between the support substrate  120  and the resin layer  109 . 
     An arbitrary material can be used within a range suitable for its purpose for the peeling layer  122 . For example, it is preferred that a material that can peel the cover layer  110  from the support substrate  120  by a heating process or etching process is used as the peeling layer  122 . It is possible to use polyimide from among organic resin materials as an example of the peeling layer  122 . In addition, it is also possible to use an amorphous silicon including hydrogen as an inorganic material as the peeling layer  122 . When these peeling layers  122  are heated by irradiating a laser beam, the adhesive between the support substrate  120  and peeling layer  122  drops and it becomes possible to peel the cover layer  110  from the support substrate. 
     As is shown in  FIG. 2B , the resin layer  109  is formed in the same shape as the bank layer in the device substrate  103  so that a concave region is formed in a part where the bank layer  114  is present to form the cover layer  110 . The thin region of the cover layer  110  is the region corresponding to the bank layer of the device substrate and the thick region corresponds to a pixel electrode. The cover layer  110  which includes regions having different thicknesses can be formed by molding the resin layer  109 . Molding the resin layer  109  can be performed by forming a mask above the resin layer  109  by photolithography and performing etching so that a concave region is formed. In addition, a concave region may be formed from the resin layer  109  using a nano-imprint. Alternatively, the cover layer  110  may be manufactured by performing a photosensitive and exposure process so that the thickness of the part which becomes the concave region becomes thin using a photosensitive organic material as the resin layer  109 . 
     Since the concave region in the cover layer  110  may also be a region in which color filter layers overlap, it is preferred that not only the height of the bank layer but also the depth of the concave part be adjusted considering the thickness of the color filter layer. In addition, in the case where a white pixel region exists in which a color filter is not formed in the device substrate, the thickness of that part is preferred to be molded thinner than the thickness of the pixel region where another color filter layer is formed. 
     In addition, it is preferred that an alignment marker is formed in the cover layer at the same time as molding the cover layer  110 . The alignment marker is also used when bonding the device substrate formed with the support substrate  120  and organic electroluminescence device, and accuracy when aligning can be increased by forming at the same time as the concave-convex parts of the resin layer  109 . 
     Following this, as is shown in  FIG. 2C , the color filter layers  112   r ,  112   g  and  112   b  are formed along the surface structure of the cover layer  110 . The thin region (convex region) of the cover layer  110  is a region corresponding to the pixel region in the device substrate  103  and the thin region (concave region) corresponds to the bank layer  114 . The color filter layers  112   r ,  112   g  and  112   b  are formed so that adjacent color filter layers overlap in the thin region (concave region) of the cover layer  110 . In  FIG. 2C , an example of forming the red color filter layer  112   r , the green color filter layer  112   g  and blue color filter layer  112   b  is shown. In this case, in the region where the red color filter layer  112   r  and green color filter layer  112   g  are adjacent, both color filter layers are stacked. This is the same for the green color filter layer  112   g  and blue color filter layer  112   b.    
     In this way, since the translucency ratio of the region where a plurality of types of color filter layers with different transmission spectrums is stacked is low compared to other regions, it is possible to provide this region with a light blocking function. 
     Next, as is shown in  FIG. 3 , the position of the cover layer  110 , the support substrate  120  formed with the color filter layers  112   r ,  112   g ,  112   b , and the device substrate formed with organic electroluminescence device  102  is adjusted, and provided so that the support substrate  120  and device substrate  103  face each other. After bonding the support substrate  120  and device substrate  103  together, the panel shown in  FIG. 1  is formed by peeling the cover layer  110  from the support substrate  120 . In addition, at the same as the peeling process, the cover layer  110  is sandwiched between the color filter layers  112   r ,  112   g  and  112   b  and attached to the device substrate  103 . Furthermore, as explained while referring to  FIG. 1 , in the device substrate  104  the organic electroluminescence layer  106  and common electrode  108  are formed along the concave-convex surface formed by the bank layer  114  enclosing the periphery part of the pixel electrode  104 . In addition, the sealing film  116  may also be formed above the common electrode  108 . 
     As shown in  FIG. 3 , the color filter layers  112   r ,  112   g  and  112   b  of the support substrate  120  are made to face the device substrate  103  and the concave region of the cover layer  110  (the region where a plurality of color filter layers with different transmission spectrums overlap) is provided to overlap the bank layer  114 . At this time, it is possible to increase alignment accuracy by using an alignment marker formed at the same time as the concave-convex parts of the cover layer  110  in the support substrate  120  in order to align the support substrate  120  and device substrate  103 . 
     Peeling of the cover layer  110  from the support substrate  120  is performed by heating the peeling layer  122  from the surface of the support substrate  120 . That is, these layers are attached above the device substrate by thermally transferring the cover layer  110  formed with the color filter layers  112   r ,  112   g  and  112   b  from the support substrate  120 . With respect to the heating method, heating may be performed by irradiating an energy beam such as a laser beam or by conduction heating by bringing a thermal body such as a thermal head in close proximity or close contact. 
     The support substrate  120  is preferred to be on the thin side and is preferred to be flexible. When arranging the support substrate  120  and device substrate  103  facing each other and thermocompressing the substrates, it is possible to bring the cover layer  110  and color filter layers  112   r ,  112   g  and  112   b  close to the surface of the device substrate by flexing the supporting substrate  120  in line with the surface shape of the device substrate  103 . 
     In this process, the cover layer  110  and color filter layers  112   r ,  112   g ,  112   b  which are transferred to the device substrate  103  from the support substrate  120  are brought close together along the concave-convex surface formed by the bank layer  114  of the device substrate  103  due to a transformation in shape by heat. In this case, it is possible support the cover layer  110  above the device substrate  103  by arranging at least the concave region of the cover layer  110  and the upper surface region of the bank layer  114  of the device substrate  103  so that they contact. Furthermore, in order to improve adhesion, a thin thermosetting resin layer (not shown in the diagram) may be provided between the sealing film  116  of the device substrate  103  and the color filter layers  112   r ,  112   g ,  112   b  above the cover layer  110 . 
     In either case, it is possible to not only to form the cover layer  110  above the device substrate  103  but also simultaneously build in a color filter layer and light blocking film by forming a color filter layer above the cover layer  110  and arranging a region to overlap color filter layers with different transmission spectrums. 
     The organic electroluminescence display device manufactured in this way can be provided with color filter layers  112   r ,  112   g  and  112   b  close to the organic electroluminescence device  102  as shown in  FIG. 1 . In addition, it is also possible to arrange a region which functions as a light blocking film formed overlapping a color filter layer directly above the bank layer  114 . As a result, according to the manufacturing method of the present embodiment, it is possible to significantly reduce light leaking to an adjacent pixel. In this way, it is possible to solve the problem of mixed colors between adjacent pixels or pixels close together and obtain an organic electroluminescence display device with excellent visual angle characteristics. 
     In addition, according to the present embodiment, there is no need to arrange a filler material between the device substrate  103  and cover layer  110  and it is possible to omit this. As a result, it is possible prevent bubbles from being included between the device substrate  103  and cover layer  110  and prevent the occurrence of matrix unevenness. 
     (Example of a Manufacturing Device, Method) 
     By using a flexible plastic film for the support substrate  120  which supports the cover layer  110  in the manufacturing processes shown in  FIG. 2A to 2C  and  FIG. 3 , it is possible to supply the support substrate  120  from a roll shaped winding can roll. 
       FIG. 4  shows an example of supplying the cover layer  110  and support substrate  120  formed with the color filter layer  112  and a manufacturing device  200  transferred to the device substrate  103 . The manufacturing device  200  is provided with a first can roll  202  which supplies a long support substrate  120 , guide rolls  206   a ,  206   b ,  206   c  for transporting the support substrate  120 , and a second can roll  204  for winding the support substrate  120 . In addition, the device includes a stage  208  which is mounted with the device substrate  103  and the support substrate  120  is stretched above the stage  208  by the guide rolls  206   a ,  206   b ,  206   c . A heating part  210  for peeling the cover layer  110  from the support substrate  120  and an alignment sensor  212  for performing alignment are provided above the stage  208 . It is possible to use a thermal head or laser as the heating part  210 . In addition, it is possible to use a camera as the alignment sensor  212 . 
     In the manufacturing device exemplified in  FIG. 4 , after the support substrate  120  sent from the first can roll  202  is extracted above the stage  208  by the guide rolls  206   a ,  206   b ,  206   c , and aligned using the alignment sensor  212 , the cover layer  110  is thermally transferred together with the color filter layer  112  from the support substrate  120 . At this time, the first can roll  202 , second can roll  204  and stage  208  send the support substrate  120  using a stepping motor and the movement of the device substrate  103  is operated in conjunction. It is preferred that a clean atmosphere is used above the stage  208  so that foreign objects are not included when transferring the cover layer  110  to the device substrate  103 , for example a reduced pressure atmosphere is preferred. 
       FIG. 5A  and  FIG. 5B  shows the details of the stage  208  part of the manufacturing device  200 .  FIG. 5A  shows a perspective view and  FIG. 5B  shows a cross-sectional view of the vicinity of the stage  208 . The support substrate  120  which is long and has flexibility is stretched above the device substrate  103  mounted on the stage  208  by the guide rolls  206   b  and  206   c . The position of the cover layer formed in the support substrate  120  and the position of the device substrate  103  are determined by detecting an alignment marker formed on each substrate using the alignment sensor  212 . The heating part  212  locally heats the support substrate  120  and the cover layer  110  is transferred together with color filter layer  112  to the device substrate  103 . 
     As is shown in  FIG. 5A , it is possible to use a large substrate known as a mother glass as the device substrate  103 , build a plurality of display panels within the large substrate, and also continuously manufacture a plurality of display panels in the long support substrate  120  by forming the cover layer  110  and color filter layer  112  in advance. 
     According to the present embodiment, it is possible to improve the production yield of an organic electroluminescence display device by using a long film with flexibility for the support substrate  120  formed with the cover layer  110  and color filter layer  112 . That is, a color filter layer is not provided in an opposing substrate as in a conventional organic electroluminescence display device but it is possible to improve a visual angle by bringing the cover layer  110  and color filter layer  112  close to the device substrate  103 , simplify the manufacturing process and achieve efficient production. 
     Second Embodiment 
       FIG. 6  shows a situation in which the cover layer  110  and color filter layer  112  are transferred in alignment with the support substrate  120  having a roughly similar size as a large substrate as the device substrate  103  in the case where a plurality of display panels are built within the large substrate know as a mother glass. 
     In  FIG. 6 , alignment is performed using alignment markers formed on the support substrate  120  and device substrate  103  and it is possible to thermally transfer the cover layer  110  and color filter layer  112  from the support substrate  120  on one go with respect to the plurality of display panels built in to the device substrate  103 . It is possible to use a relatively thin plastic substrate or glass substrate as the support substrate  120  formed with the cover layer  110  and color filter layer  112 . 
     For the thermal transfer process, either a method for heating the same surface of the support substrate  120  or a method for partially heating the support substrate  120  may be applied. For example, the same surface of the support substrate  120  may be heated by several heating processes using a small thermal head as the heating object and thermal transfer may also be performed in one go using a large heating object. 
     In addition, as is shown in  FIG. 7 , a thermal control function may be provided in the roller  211  and thermal transfer may be performed by pushing the roller  211  against the support substrate  120  while rotating.  FIG. 7  shows an aspect in which the support substrate  120  formed with the color filter layers  112   r ,  112   g ,  112   b  and the cover layer  110  is aligned with the device substrate  103  and the same surface of the substrates are processed while applying pressure using the roller  211  which is the heating object from the rear surface of the support substrate  120 . It is possible securely bond the color filter layers  112   r ,  112   g ,  112   b  and cover layer  110  to the device substrate  103  side by applying pressure to the support substrate  120  using the roller  211 . 
     In this way, in the case of corresponding the device substrate  103  and the support substrate  120  one by one, it is possible to use a hard substrate for one and a flexible substrate for the other. For example, if a glass substrate is used as the support substrate formed with the cover layer  110  and the color filter layer  112 , it is possible to use a flexible substrate for the device substrate manufactured by the display device. In this case, because it is also possible to accurately transfer the cover layer  112  to the device substrate  103 , it is possible to easily manufacture a display device with flexibility known as a sheet display. 
     Furthermore, as shown in  FIG. 6 , it is possible to use a dot shaped product provided with a color filter layer for each pixel or a striped shaped product provided continuously across a plurality of pixels. In either case, it is possible to overlap color filter layers with different transmission spectrums and obtain arrange a light blocking region in a boundary region of adjacent pixels. 
     Modified Example 1 
     In the case where a color filter layer is transferred to the device substrate  103 , the color filter layer may be transferred not at the same time as the cover layer but before the cover layer. In this case, it is possible to use a support substrate formed with a red color filter layer, green color filter layer and blue color filter layer separate from a support substrate formed with a cover layer and transfer these color filter layers to the device substrate. In addition, a color filter layer may be transferred separately for each color. 
       FIG. 8  shows an example of transferring a color filter layer for each color from a support substrate  121  of a color filter layer to the device substrate  103  and shows an aspect of thermally transferring a red color filter layer  112   r  as one example. The color filter layer is transferred in the following sequence; the blue color filter layer is transferred after the red color filter layer and then the green color filter layer. Furthermore, the transfer of each color filter layer is not limited to this order and it is possible to form a color filter layer of each color in an arbitrary order. 
     In  FIG. 8 , it is preferred that the red color filter layer  112   r  is formed overlapping the upper surface part of the bank layer  114 . It is possible to stack different color filter layers above the bank layer  114  by forming the green color filter layer  112   g  to contact the upper part of the bank layer  114  after the red color filter layer  112   r.    
       FIG. 9  shows a stage where the cover layer  110  is peeled from the support substrate  120  in a state where the color filter layers  112   r ,  112   g  and  112   b  are formed in the device substrate  103 . When the cover layer  110  is peeled from the support substrate  120 , heating is performed in pressed state to the device substrate  103 , the color filter layers  112   r ,  112   g  and  112   b  change shape matching the concave-convex surface of the bank layer  114  and it is possible to bond to the concave-convex surface together with cover layer  110 . 
     In this way, it is possible to provide a cover filter layer in close proximity to an organic electroluminescence device even when forming a color filter layer and cover layer separately above a device substrate. In this case, because a color filter layer of each color may be formed in advance in a support substrate respectively, it is possible to improve yield and reduce manufacturing costs compared to forming a color filter layer of all colors. 
     Modified Example 2 
     In an organic electroluminescence display device, in the case where a color filter layer is provided in close proximity to an organic electroluminescence device, a concave region is not formed in a cover layer as shown in  FIG. 1  but a color filter layer is formed so that a concave-convex surface using the bank layer  114  and the surface of the color filter layer are aligned.  FIG. 10  shows an example of forming a color filter layer and bringing the layer in close proximity to an organic electroluminescence device. 
     In  FIG. 10 , a red (R) color filter layer  112   rb , a green (G) color filter layer  112   gb  and blue (B) color filter layer  112   bb  are provided matching the shape of the concave-convex surface using the bank layer  114  so as to be in close proximity of the organic electroluminescence device  102 . That is, a color filter layer is filled in the concave part of the concave-convex part formed by the bank layer  114 . These color filter layers are provided so that adjacent color filter layers overlap in the upper part of the bank layer  114 . The region where the adjacent color filter layers are overlapping functions as a light blocking film. A cover layer may be provided in the upper part of the color filter layers  112   rb ,  112   gb  and  112   bb.    
     Since the organic electroluminescence device  102  and color filter layers  112   rb ,  112   gb  and  112   bb  are also provided in close proximity in the organic electroluminescence display device  100   b  shown in  FIG. 10 , it is possible obtain the same effects as the organic electroluminescence display device shown in the first embodiment.