Patent Publication Number: US-10770658-B2

Title: Method of manufacturing organic light-emitting device and method of manufacturing display unit

Description:
CROSS REFERENCES TO RELATED APPLICATIONS 
     The present application is a continuation of U.S. patent application Ser. No. 16/005,098, filed on Jun. 11, 2018, which is a continuation of U.S. patent application Ser. No. 14/910,193, filed on Feb. 4, 2016 (now U.S. Pat. No. 10,020,448), which is a National Stage Entry of International Application No. PCT/JP2014/073180, filed on Sep. 3, 2014, and claims priority to Japanese Priority Patent Application 2013-194362 filed in the Japan Patent Office on Sep. 19, 2013, the entire contents of each are incorporated herein by reference. 
    
    
     BACKGROUND 
     The technology relates to a method of manufacturing an organic-light emitting device using, for example, a printing method, and a method of manufacturing a display unit using the same. 
     In recent years, a method of forming an organic layer of an organic EL (electroluminescence) device by a printing method has been proposed. The printing method holds promise because of, for example, lower process cost than that in a vacuum evaporation method and easy upsizing. 
     The printing method is broadly divided into a non-contact system and a contact system as printing systems. Examples of the non contact system may include an ink-jet method and a nozzle printing method. Examples of the contact system may include a flexographic printing method, a gravure offset printing method, and a reverse offset printing method. 
     In the reverse offset printing method, after a film of an ink is uniformly formed on a surface of a blanket, the blanket is pressed against a plate to remove a non-printing portion, and then a pattern remaining on the blanket is transferred to a printing target. The surface of the blanket may be formed of, for example, silicon rubber. The reverse offset printing method is considered as a promising method for application to an organic EL device, since the method makes it possible to form a film with a uniform thickness and to perform high-definition patterning (for example, refer to Patent Literature 1). 
     CITATION LIST 
     Patent Literature 
     Patent Literature 1: Japanese Unexamined Patent Application Publication No. 2010-158799 
     SUMMARY 
     It is desirable to form such an organic EL device without decreasing, for example but not limited to, light emission efficiency, and light emission lifetime. 
     Therefore, it is desirable to provide a method of manufacturing an organic light-emitting device that makes it possible to prevent deterioration, and a method of manufacturing a display unit using the same. 
     A method of manufacturing an organic light-emitting device according to an embodiment (A) of the technology includes: forming a first organic material layer on a substrate; and forming a mask in a first region on the first organic material layer, and then selectively removing the first organic material layer to form a first organic layer in the first region. 
     A method of manufacturing an organic light-emitting device according to an embodiment (B) of the technology includes: forming a liquid-repellent mask having an aperture in a first region on a substrate; and thereafter forming a first organic layer in the first region. 
     A method of manufacturing a display unit according to an embodiment (A) of the technology uses a first method of manufacturing the organic light-emitting device according to the technology. 
     A method of manufacturing a display unit according to an embodiment (B) of the technology uses a second method of manufacturing the organic light-emitting device according to the technology. 
     In the methods of manufacturing the organic light-emitting device or the methods of manufacturing the display unit according to the embodiments (A) and (B) of the technology, the first organic layer is formed in the first region by the mask on the substrate. Therefore, a process of forming a pattern of the organic layer on a blanket in advance by, for example but not limited to, a reverse offset printing method is unnecessary. 
     According to the methods of manufacturing the organic light-emitting device and the methods of manufacturing the display unit according to the embodiments (A) and (B) of the technology, the mask is used on the substrate; therefore, this makes it possible to form the first organic layer in a desired region (the first region) without bringing the blanket and the organic layer into contact with each other. This makes it possible to prevent entry of impurities from, for example, but not limited to, the blanket to the first organic layer and to suppress deterioration of the organic light-emitting device. It is to be noted that effects of the embodiments of the technology are not limited to effects described here, and may include any effect described in this description. 
     Additional features and advantages are described herein, and will be apparent from the following Detailed Description and the figures. 
    
    
     
       BRIEF DESCRIPTION OF THE FIGURES 
         FIG. 1  is a sectional view of a configuration of a main part of a display unit manufactured by a method according to a first embodiment of the technology. 
         FIG. 2  is a diagram of the entire display unit illustrated in  FIG. 1 . 
         FIG. 3  is a diagram of an example of a pixel drive circuit. 
         FIG. 4  is a diagram of a flow of the method of manufacturing the display unit illustrated in  FIG. 1 . 
         FIG. 5A  is a sectional view of a process of the method of manufacturing the display unit illustrated in  FIG. 1 . 
         FIG. 5B  is a sectional view of a process following  FIG. 5A . 
         FIG. 5C  is a sectional view of a process following  FIG. 5B . 
         FIG. 5D  is a sectional view of a process following  FIG. 5C . 
         FIG. 6A  is a sectional view of an example of a method of forming a mask illustrated in  FIG. 5C . 
         FIG. 6B  is a sectional view of a process following  FIG. 6A . 
         FIG. 6C  is a sectional view of a process following  FIG. 6B . 
         FIG. 7A  is a sectional view of a process following  FIG. 6C . 
         FIG. 7B  is a sectional view of a process following  FIG. 7A . 
         FIG. 7C  is a sectional view of a process following  FIG. 7B . 
         FIG. 7D  is a sectional view of a process following  FIG. 7C . 
         FIG. 8A  is a sectional view of a process following  FIG. 5D . 
         FIG. 8B  is a sectional view of a process following  FIG. 8A . 
         FIG. 8C  is a sectional view of a process following  FIG. 8B . 
         FIG. 8D  is a sectional view of a process following  FIG. 8C . 
         FIG. 9A  is a sectional view of a process following  FIG. 8D . 
         FIG. 9B  is a sectional view of a process following  FIG. 9A . 
         FIG. 9C  is a sectional view of a process following  FIG. 9B . 
         FIG. 10A  is a sectional view of a process of a method of forming a light-emitting layer according to a comparative example. 
         FIG. 10B  is a sectional view of a process following  FIG. 10A . 
         FIG. 10C  is a sectional view of a process following  FIG. 10B . 
         FIG. 10D  is a sectional view of a process following  FIG. 10C . 
         FIG. 11  is a sectional view of a main part of a display unit manufactured by a method according to Modification Example 1. 
         FIG. 12A  is a sectional view of a process of the method of manufacturing the display unit illustrated in  FIG. 11 . 
         FIG. 12B  is a sectional view of a process following  FIG. 12A . 
         FIG. 12C  is a sectional view of a process following  FIG. 12B . 
         FIG. 13A  is a sectional view of a process following  FIG. 12C . 
         FIG. 13B  is a sectional view of a process following  FIG. 13A . 
         FIG. 13C  is a sectional view of a process following  FIG. 13B . 
         FIG. 14A  is a sectional view of a process of a method of manufacturing a display unit according to a second embodiment of the technology. 
         FIG. 14B  is a sectional view of a process following  FIG. 14A . 
         FIG. 14C  is a sectional view of a process following  FIG. 14B . 
         FIG. 15A  is a sectional view of a process following  FIG. 14C . 
         FIG. 15B  is a sectional view of a process following  FIG. 15A . 
         FIG. 15C  is a sectional view of a process following  FIG. 15B . 
         FIG. 16A  is a sectional view of a process following  FIG. 15C . 
         FIG. 16B  is a sectional view of a process following  FIG. 16A . 
         FIG. 16C  is a sectional view of a process following  FIG. 16B . 
         FIG. 17A  is a sectional view of a process of a method of manufacturing a display unit according to Modification Example 2. 
         FIG. 17B  is a sectional view of a process following  FIG. 17A . 
         FIG. 17C  is a sectional view of a process following  FIG. 17B . 
         FIG. 18A  is a sectional view of a process following  FIG. 17C . 
         FIG. 18B  is a sectional view of a process following  FIG. 18A . 
         FIG. 18C  is a sectional view of a process following  FIG. 18B . 
         FIG. 19  is a sectional view of a configuration of a main part of a display unit manufactured by a method according to Modification Example 3. 
         FIG. 20A  is a sectional view of an example of a process of forming a light-emitting layer illustrated in  FIG. 19 . 
         FIG. 20B  is a sectional view of a process following  FIG. 20A . 
         FIG. 20C  is a sectional view of a process following  FIG. 20B . 
         FIG. 20D  is a sectional view of a process following  FIG. 20C . 
         FIG. 21  is a sectional view of a configuration of a main part of a display unit manufactured by a method according to Modification Example 4. 
         FIG. 22A  is a sectional view of an example (Modification Example 4-2) of a process of forming a light-emitting layer illustrated in  FIG. 21 . 
         FIG. 22B  is a sectional view of a process following  FIG. 22A . 
         FIG. 23A  is a sectional view of an example (Modification Example 4-3) of the process of forming the light-emitting layer illustrated in  FIG. 21 . 
         FIG. 23B  is a sectional view of a process following  FIG. 23A . 
         FIG. 24A  is a sectional view of an example (Modification Example 4-4) of the process of forming the light-emitting layer illustrated in  FIG. 21 . 
         FIG. 24B  is a sectional view of a process following  FIG. 24A . 
         FIG. 24C  is a sectional view of a process following  FIG. 24B . 
         FIG. 24D  is a sectional view of a process following  FIG. 24C . 
         FIG. 25A  is a sectional view of a process following  FIG. 24D . 
         FIG. 25B  is a sectional view of a process following  FIG. 25A . 
         FIG. 25C  is a sectional view of a process following  FIG. 25B . 
         FIG. 25D  is a sectional view of a process following  FIG. 25C . 
         FIG. 26A  is a sectional view of an example (Modification Example 4-5) of the process of forming the light-emitting layer illustrated in  FIG. 21 . 
         FIG. 26B  is a sectional view of a process following  FIG. 26A . 
         FIG. 26C  is a sectional view of a process following  FIG. 26B . 
         FIG. 27  is a sectional view of a configuration of a main part of a display unit manufactured by a method according to Modification Example 5. 
         FIG. 28A  is a sectional view of an example of a process of forming a hole transport layer illustrated in  FIG. 27 . 
         FIG. 28B  is a sectional view of a process following  FIG. 28A . 
         FIG. 28C  is a sectional view of a process following  FIG. 28B . 
         FIG. 28D  is a sectional view of a process following  FIG. 28C . 
         FIG. 29A  is a sectional view of another example of the process of forming the hole transport layer illustrated in  FIG. 27 . 
         FIG. 29B  is a sectional view of a process following  FIG. 29A . 
         FIG. 29C  is a sectional view of a process following  FIG. 29B . 
         FIG. 29D  is a sectional view of a process following  FIG. 29C . 
         FIG. 30  is a sectional view of a configuration of a main part of a display unit manufactured by a method according to Modification Example 6. 
         FIG. 31  is a sectional view of a configuration of a main part of a display unit manufactured by a method according to Modification Example 7. 
         FIG. 32  is a sectional view of a configuration of a main part of a display unit manufactured by a method according to Modification Example 8. 
         FIG. 33A  is a sectional view of an example of the method of manufacturing the display unit illustrated in  FIG. 32 . 
         FIG. 33B  is a sectional view of a process following  FIG. 33A . 
         FIG. 33C  is a sectional view of a process following  FIG. 33B . 
         FIG. 33D  is a sectional view of a process following  FIG. 33C . 
         FIG. 34A  is a sectional view of a process following  FIG. 33D . 
         FIG. 34B  is a sectional view of a process following  FIG. 34A . 
         FIG. 34C  is a sectional view of a process following  FIG. 34B . 
         FIG. 35A  is a sectional view of a process following  FIG. 34C . 
         FIG. 35B  is a sectional view of a process following  FIG. 35A . 
         FIG. 35C  is a sectional view of a process following  FIG. 35B . 
         FIG. 36A  is a sectional view of another example of the method of manufacturing the display unit illustrated in  FIG. 32 . 
         FIG. 36B  is a sectional view of a process following  FIG. 36A . 
         FIG. 36C  is a sectional view of a process following  FIG. 36B . 
         FIG. 37A  is a sectional view for describing a method of manufacturing a display unit according to a third embodiment of the technology. 
         FIG. 37B  is a sectional view of another example illustrated in  FIG. 37A . 
         FIG. 37C  is a sectional view of still another example illustrated in  FIG. 37A . 
         FIG. 38  is a sectional view of a configuration of a main part of a display unit manufactured by a method according to Modification Example 9. 
         FIG. 39A  is a sectional view of an example of the method of manufacturing the display unit illustrated in  FIG. 38 . 
         FIG. 39B  is a sectional view of a process following  FIG. 39A . 
         FIG. 39C  is a sectional view of a process following  FIG. 39B . 
         FIG. 40A  is a sectional view of a process following  FIG. 39C . 
         FIG. 40B  is a sectional view of a process following  FIG. 40A . 
         FIG. 40C  is a sectional view of a process following  FIG. 40B . 
         FIG. 41A  is a sectional view of a process following  FIG. 40C . 
         FIG. 41B  is a sectional view of a process following  FIG. 41A . 
         FIG. 41C  is a sectional view of a process following  FIG. 41B . 
         FIG. 42  is a sectional view of a configuration of a main part of a display unit manufactured by a method according to Modification Example 10. 
         FIG. 43A  is a sectional view of an example of the method of manufacturing the display unit illustrated in  FIG. 42 . 
         FIG. 43B  is a sectional view of a process following  FIG. 43A . 
         FIG. 43C  is a sectional view of a process following  FIG. 43B . 
         FIG. 44A  is a sectional view of a process following  FIG. 43C . 
         FIG. 44B  is a sectional view of a process following  FIG. 44A . 
         FIG. 44C  is a sectional view of a process following  FIG. 44B . 
         FIG. 45A  is a sectional view of a process following  FIG. 44C . 
         FIG. 45B  is a sectional view of a process following  FIG. 45A . 
         FIG. 45C  is a sectional view of a process following  FIG. 45B . 
         FIG. 46  is a sectional view of a configuration of a main part of a display unit manufactured by a method according to Modification Example 11. 
         FIG. 47A  is a sectional view of an example of the method of manufacturing the display unit illustrated in  FIG. 46 . 
         FIG. 47B  is a sectional view of a process following  FIG. 47A . 
         FIG. 47C  is a sectional view of a process following  FIG. 47B . 
         FIG. 48A  is a sectional view of a process following  FIG. 47C . 
         FIG. 48B  is a sectional view of a process following  FIG. 48A . 
         FIG. 48C  is a sectional view of a process following  FIG. 48B . 
         FIG. 49A  is a sectional view of a process following  FIG. 48C . 
         FIG. 49B  is a sectional view of a process following  FIG. 49A . 
         FIG. 49C  is a sectional view of a process following  FIG. 49B . 
         FIG. 50  is a sectional view of a configuration of a main part of a display unit manufactured by a method according to Modification Example 12. 
         FIG. 51  is a sectional view for describing resolution. 
         FIG. 52A  is a sectional view of an example of a state in which a mask illustrated in  FIG. 50  is removed. 
         FIG. 52B  is a sectional view of another example of  FIG. 52A . 
         FIG. 52C  is a sectional view of still another example of  FIG. 52A . 
         FIG. 53  is a plan view of a schematic configuration of a module including the display unit manufactured by one of the foregoing embodiments and other examples. 
         FIG. 54  is a perspective view of an appearance of Application Example 1 of the display unit manufactured by one of the foregoing embodiments and other examples. 
         FIG. 55A  is a perspective view of an appearance viewed from a front side of Application Example 2. 
         FIG. 55B  is a perspective view of an appearance viewed from a back side of Application Example 2. 
         FIG. 56  is a perspective view of an appearance of Application Example 3. 
         FIG. 57  is a perspective view of an appearance of Application Example 4. 
         FIG. 58A  is a diagram of a state in which Application Example 5 is closed. 
         FIG. 58B  is a diagram of a state in which Application Example 5 is opened. 
         FIG. 59  is a perspective view of an appearance of an example of an illumination unit to which an organic light-emitting device illustrated in  FIG. 1  and other drawings is applied. 
         FIG. 60  is a perspective view of an appearance of another example of the illumination unit. 
         FIG. 61  is a perspective view of an appearance of still another example of the illumination unit. 
     
    
    
     DETAILED DESCRIPTION 
     Embodiments of the present application will be described below in detail with reference to the drawings. 
     Some embodiments of the technology will be described in detail below with reference to the accompanying drawings. It is to be noted that description will be given in the following order. 
     1. First Embodiment (A method of manufacturing a display unit including a light-emitting layer in each device: an example in which the light-emitting layer is patterned into the same shape as that of a mask) 
     2. Modification Example 1 (An example in which a liquid-repellent partition wall is formed) 
     3. Second Embodiment (An example in which a liquid-repellent mask is used) 
     4. Modification Example 2 (An example in which a region from a front surface to a side surface of an organic layer is covered with a mask) 
     5. Modification Example 3 (An example including a light-emitting layer shared by devices) 
     6. Modification Example 4 (An example including a connection layer) 
     7. Modification Example 5 (An example including a hole transport layer in each device) 
     8. Modification Examples 6 to 8 (Examples in which a predetermined device includes a hole transport layer) 
     9. Third Embodiment (An example in which an organic layer is formed with use of an evaporation method) 
     10. Modification Example 9 (An example including a hole injection layer and a hole transport layer in each device) 
     11. Modification Example 10 (An example including an electron transport layer and an electron injection layer in each device) 
     12. Modification Example 11 (An example in which all organic layers are formed in each device) 
     13. Modification Example 12 (An example in which organic layers of adjacent devices are formed to overlap each other) 
     First Embodiment 
     [Configuration of Display Unit  1 ] 
       FIG. 1  illustrates a sectional configuration of a display unit (a display unit  1 ) manufactured by a method according to a first embodiment of the technology that will be described later. This display unit  1  is an organic EL (Electroluminescence) display unit, and may include, for example, a red organic EL device  10 R, a green organic EL device  10 G, and a blue organic EL device  10 B on a substrate  11  with a TFT (Thin Film Transistor) layer  12  and a planarization layer  13  in between. 
     (Entire Configuration) 
       FIG. 2  illustrates an entire configuration of this display unit  1 . A plurality of red organic EL devices  10 R, a plurality of green organic EL devices  10 G, and a plurality of blue organic EL devices  10 B are provided in a display region  110  in a central region of the substrate  11 , and are arranged in a matrix. A driver signal line drive circuit  120  and a scanning line drive circuit  130  for image display are provided around the display region  110 . 
     A pixel drive circuit  140  for driving of the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B is provided in the display region  110  together with the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B.  FIG. 3  illustrates an example of the pixel drive circuit  140 . The pixel drive circuit  140  is an active drive circuit formed in a layer (for example, the TFT layer  12 ) below a lower electrode  14  that will be described later. In other words, this pixel drive circuit  140  includes a driving transistor Tr 1 , a writing transistor Tr 2 , a capacitor (a retention capacitor) Cs between these transistors Tr 1  and Tr 2 , and the red organic E 1  device  10 R (or the green organic EL device  10 G or the blue organic EL device  10 B) connected in series to the driving transistor Tr 1  between a first power supply line (Vcc) and a second power supply line (GND). Each of the driving transistor Tr 1  and the writing transistor Tr 2  may be configured of a typical thin film transistor (TFT), and may have, for example, but not exclusively, an inverted stagger configuration (a so-called bottom gate configuration) or a stagger configuration (a top gate configuration). 
     In the pixel drive circuit  140 , a plurality of signal lines  120 A are provided along a column direction, and a plurality of scanning lines  130 A are provided along a row direction. An intersection of each signal line  120 A and each scanning line  130 A corresponds to one of the red organic EL device  10 R, the green organic EL device  10 G, and the blue organic EL device  10 B. Each of the signal lines  120 A is connected to the signal line drive circuit  120 , and an image signal is supplied from the signal line drive circuit  120  to a source electrode of the writing transistor Tr 2  through the signal line  120 A. Each of the scanning lines  130 A is connected to the scanning line drive circuit  130 , and a scanning signal is sequentially supplied from the scanning line drive circuit  130  to a gate electrode of the writing transistor Tr 2  through the scanning line  130 A. 
     The signal line drive circuit  120  is configured to supply a signal voltage of an image signal according to luminance information supplied from a signal supply source (not illustrated) to the selected red organic EL device  10 R, the selected green organic EL device  10 G, or the selected blue organic EL device  10 B through the signal line  120 A. The scanning line drive circuit  130  may be configured of, for example but not limited to, a shift register configured to sequentially shift (transfer) a start pulse in synchronization with an inputted clock pulse. The scanning line drive circuit  130  is configured to scan pixels  10  row by row upon writing of an image signal to each of the pixels  10  and sequentially supply a scanning signal to each of the scanning lines  130 A. The signal voltage from the signal line drive circuit  120  and the scanning signal from the scanning line drive circuit  130  are supplied to the signal line  120 A and the scanning line  130 A, respectively. 
     (Main-Part Configuration of Display Unit  1 ) 
     Next, referring again to  FIG. 1 , specific configurations of, for example but not limited to, the substrate  11 , the TFT layer  12 , the planarization layer  13 , the organic EL devices (the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B) will be described below. 
     The substrate  11  is a supporting body with a flat surface on which the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 G are formed in an array. For example, known materials such as quartz, glass, metal foil, and a film or a sheet made of a resin may be used. In particular, quartz or glass may be preferably used. In a case where the film or the sheet made of the resin is used, as the resin, for example but not limited to, methacrylate resins typified by poly(methyl methacrylate) (PMMA), polyesters such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and polybutylene naphthalate (PBN), and a polycarbonate resin may be used; however, in this case, to suppress water permeability and gas permeability, the substrate  11  may preferably have a laminate configuration, and may be preferably subjected to surface treatment. 
     As described above, the pixel drive circuit  140  is formed in the TFT layer  12 , and the driving transistor Tr 1  is electrically connected to the lower electrode  14 . The planarization layer  13  is configured to planarize a surface of the substrate  11  (the TFT layer  12 ) on which the pixel drive circuit  140  is formed, and may be preferably made of a material with high pattern accuracy, since a fine connection hole (not illustrated) allowing the driving transistor Tr 1  and the lower electrode  14  to be connected to each other is formed in the planarization layer  13 . Examples of the material of the planarization layer  13  may include an organic material such as polyimide and an inorganic material such as silicon oxide (SiO2). 
     Each of the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B includes the lower electrode  14  as an anode, a partition wall  15 , an organic layer  16 , and an upper electrode  17  as a cathode in this order from the substrate  11 . The organic layer  16  includes a hole injection layer  161 , a hole transport layer  162 , a light-emitting layer  163 , an electron transport layer  164 , and an electron injection layer  165  in this order from the lower electrode  14 . The light-emitting layer  163  is configured of a red light-emitting layer  163 R, a green light-emitting layer  163 G, and a blue light-emitting layer  163 B, and the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B are provided for the red organic EL device  10 R, the green organic EL device  10 G, and the blue organic EL device  10 B, respectively. 
     The lower electrode  14  is provided on the planarization layer  13  for each of the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B, and may be made of, for example, a transparent material of a simple substance or an alloy of a metal element such as chromium (Cr), gold (Au), platinum (Pt), nickel (Ni), copper (Cu), tungsten (W), or silver (Ag). Alternatively, the lower electrode  14  may be configured of a laminate configuration of the foregoing metal film and a transparent conductive film. Examples of the transparent conductive film may include an oxide of indium and tin (ITO), indium-zinc oxide (InZnO), and an alloy of zinc oxide (ZnO) and aluminum (Al). In a case where the lower electrode  14  is used as an anode, the lower electrode  14  may be preferably made of a material with high hole injection properties; however, even if a material with an insufficient work function such as an aluminum alloy is used, the lower electrode  14  may function as an anode by providing the appropriate hole injection layer  161 . 
     The partition wall  15  is configured to secure insulation between the lower electrode  14  and the upper electrode  17  and to form a light emission region into a desired shape, and has an aperture corresponding to the light emission region. Layers above the partition wall  15 , i.e., layers from the hole injection layer  161  to the upper electrode  17  may be provided not only on the aperture but also on the partition wall  15 ; however, light is emitted only from the aperture. The partition wall  15  may be made of, for example, an inorganic insulating material such as silicon oxide. The partition wall  15  may be configured by laminating a photosensitive resin such as positive photosensitive polybenzoxazole or positive photosensitive polyimide on an inorganic insulating material. 
     The hole injection layer  161  is shared by the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B, and is configured to enhance hole injection efficiency and to have a function as a buffer layer configured to prevent leakage. The hole injection layer  161  may be formed preferably with, for example, a thickness of 5 nm to 100 nm both inclusive, and more preferably with a thickness of 8 nm to 50 nm both inclusive. 
     Examples of the material of the hole injection layer  161  may include polyaniline and a derivative thereof, polythiophene and a derivative thereof, polypyrrole and a derivative thereof, polyphenylene and a derivative thereof, polythienylene vinylene and a derivative thereof, polyquinoline and a derivative thereof, polyquinoxaline and a derivative thereof, a conductive polymer such as a polymer including an aromatic amine structure in a main chain or a side chain, metal phthalocyanine (such as copper phthalocyanine), and carbon, and the material of the hole injection layer  161  may be appropriately selected, depending on a relationship with the material of an electrode or a layer adjacent thereto. 
     In a case where the hole injection layer  161  is made of a polymer material, the weight-average molecular weight (Mw) of the polymer material may be, for example, from about 2000 to about 300000 both inclusive, and may be preferably from about 5000 to about 200000 both inclusive. When the Mw is less than 5000, there is a possibility that the polymer material is dissolved when the hole transport layer  162  and layers thereabove are formed, and when the Mw exceeds 300000, film formation may be difficult due to gelation of the material. 
     Examples of a typical polymer material used for the hole injection layer  161  may include polyaniline and/or oligoaniline, and polydioxythiophene such as poly(3,4-ethylenedioxythiophene) (PEDOT). More specifically, for example but not limited to, Nafion (trademark) and Liquion (trademark) manufactured by H.C. Starck GmbH, ELsource (trademark) manufactured by Nissan Chemical Industries. Ltd., or a conductive polymer called Verazol manufactured by Soken Chemical &amp; Engineering Co., Ltd. may be used. 
     In a case where the lower electrode  14  is used as an anode, the lower electrode  14  may be preferably formed of a material with high hole injection properties. However, for example, even a material with a relatively small work function value such as an aluminum alloy may be used as the material of the anode by providing the appropriate hole injection layer  161 . 
     The hole transport layer  162  is configured to enhance hole transport efficiency to the light-emitting layer  163 , and is provided on the hole injection layer  161  to be shared by the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B. 
     Depending on an entire device configuration, a thickness of the hole transport layer  162  may be, preferably from 10 nm to 200 nm both inclusive, and more preferably from 15 nm to 150 nm both inclusive. As a polymer material forming the hole transport layer  162 , a light-emitting material soluble in an organic solvent, for example but not limited to, polyvinylcarbazole and a derivative thereof, polyfluorene and a derivative thereof, polyaniline and a derivative thereof, polysilane and a derivative thereof, a polysiloxane derivative having an aromatic amine in a side chain or a main chain, polythiophene and a derivative thereof, and polypyrrole may be used. 
     A weight-average molecular weight (Mw) of the polymer material may be preferably from about 50000 to about 300000 both inclusive, and may be specifically preferably from about 100000 to about 200000 both inclusive. In a case where the Mw is less than 50000, upon formation of the light-emitting layer, a low-molecular-weight component in the polymer material is lost to cause a dot in a hole injection/transport layer; therefore, initial performance of the organic EL device may be degraded, or deterioration of the device may be caused. On the other hand, in a case where the Mw exceeds 300000, film formation may be difficult due to gelation of the material. 
     It is to be noted that the weight-average molecular weight (Mw) is a value determined by gel permeation chromatography (GPC) using polystyrene standards with use of tetrahydrofuran as a solvent. 
     The light-emitting layer  163  is configured to emit light by the recombination of electrons and holes in response to the application of an electric field. The red light-emitting layer  163 R may be made of, for example, a light-emitting material having one or more peaks in a wavelength range of 620 nm to 750 nm both inclusive, the green light-emitting layer  163 G may be made of, for example, a light-emitting material having one or more peaks in a wavelength range of 495 nm to 570 nm both inclusive, and the blue light-emitting layer  163 B may be made of, for example, a light-emitting material having one or more peaks in a wavelength range of 450 nm to 495 nm both inclusive. Depending on the entire device configuration, a thickness of the light-emitting layer  163  may be preferably, for example, from 10 nm to 200 nm both inclusive, and more preferably from 15 nm to 100 nm both inclusive. 
     For the light-emitting layer  163 , for example, a mixed material in which a low-molecular-weight material (a monomer or an oligomer) is added to a polymer (light-emitting) material may be used. Examples of the polymer material forming the light-emitting layer  163  may include a polyfluorene-based polymer derivative, a (poly)paraphenylene vinylene derivative, a polyphenylene derivative, a polyvinylcarbazole derivative, a polythiophene derivative, a perylene-based pigment, a coumarin-based pigment, a rhodamine-based pigment, and the foregoing polymer material doped with an organic EL material. As a doping material, for example, rubrene, perylene, 9,10-diphenylanthracene, tetraphenyl butadiene, nile red, or Coumarin6 may be used. 
     The electron transport layer  164  is configured to enhance electron transport efficiency to the light-emitting layer  163 , and is provided as a common layer shared by the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B. For example, quinoline, perylene, phenanthroline, phenanthrene, pyrene, bisstyryl, pyrazine, triazole, oxazole, fullerene, oxadiazole, fluorenone, anthracene, naphthalene, butadiene, coumarin, acridine, stilbene, derivatives thereof, and metal complexes thereof, for example, tris(8-hydroxyquinoline) aluminum (Alq3 for short) may be used as the material of the electron transport layer  164 . 
     The electron injection layer  165  is configured to enhance electron injection efficiency, and is provided as a common layer on an entire surface of the electron transport layer  164 . As the material of the electron injection layer  165 , for example, lithium oxide (Li 2 O) which is an oxide of lithium (Li), cesium carbonate (Cs 2 CO 3 ) which is a complex oxide of cesium, or a mixture thereof may be used. Moreover, as the material of the electron injection layer  165 , a simple substance or an alloy of an alkali-earth metal such as calcium (Ca) or barium (Ba), an alkali metal such as lithium or cesium, or a metal with a small work function such as indium (In) or magnesium (Mg) may be used, and alternatively, oxides, complex oxides, and fluorides of the metals, and a mixture thereof may be used. 
     The upper electrode  17  is provided on an entire surface of the electron injection layer  165  in a state in which the upper electrode  17  is insulated from the lower electrode  14 . In other words, the upper electrode  17  is a common electrode shared by the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B. The upper electrode  17  may be formed of, for example, aluminum (Al) with a thickness of 200 nm. 
     The red organic EL devices  10 R, the green organic EL devices  10 G, and the Oblue organic EL devices  10 B may be covered with, for example, a protective layer (not illustrated), and a sealing substrate (not illustrated) made of glass or the like is further bonded onto an entire surface of the protective layer with an adhesive layer (not illustrated) made of a thermosetting resin, an ultraviolet curable resin, or the like in between. 
     The protective layer may be made of one of an insulating material and a conductive material, and may be formed with, for example, a thickness of 2 μm to 3 μm both inclusive. For example, an inorganic amorphous insulating material such as amorphous silicon (α-silicon), amorphous silicon carbide (α-SiC), amorphous silicon nitride (α-Si 1-X N X ), or amorphous carbon (α-C) may be used. Since such a material does not form grains, the material has low water permeability, and forms a favorable protective film. 
     The sealing substrate is disposed close to the upper electrode  17  of the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B, and is configured to seal, together with the adhesive layer, the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B. 
     In the display unit  1 , light from the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B may be extracted from either the substrate  11  or the sealing substrate, and the display unit  1  may be a bottom emission display unit or a top emission display unit. In a case where the display unit  1  is a bottom emission display unit, a color filter (not illustrated) may be provided between the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B, and the substrate  11 . In a case where the display unit  1  is a top emission display unit, the color filter may be provided between the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B, and the sealing substrate. 
     The color filter includes a red filter, a green filter, and a blue filter facing each of the red organic EL devices  10 R, each of the green organic EL devices  10 G, and each of the blue organic EL devices  10 B, respectively. Each of the red filter, the green filter, and the blue filter is made of a resin including a pigment, and appropriate selection of the pigment makes it possible to adjust the red filter, the green filter, and the blue filter so as to have high light transmittance in a wavelength range of target red, green, or blue and low light transmittance in other wavelength ranges. 
     In the color filter, a light-shielding film is provided as a black matrix together with the red filter, the green filter, and the blue filter. By the light-shielding film, light generated in the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B is extracted, and outside light reflected by the red organic EL devices  10 R, the green organic EL devices  10 G, the blue organic EL devices  10 B, and wiring lines therebetween is absorbed, thereby obtaining high contrast. The light-shielding film may be configured of, for example, a black resin film that contains a black colorant and has optical density of 1 or more, or a thin film filter using interference of a thin film. In particular, the light-shielding film may be preferably configured of the black resin film, since the black resin film makes it possible to form the light-shielding film easily at low cost. The thin film filter may include, for example, one or more thin films made of a metal, a metal nitride, or a metal oxide, and is configured to attenuate light with use of interference of the thin film. Specifically, a thin film filter configured by alternately laminating chromium (Cr) and chromium oxide (Cr 2 O 3 ) may be used. 
     [Method of Manufacturing Display Unit  1 ] 
       FIG. 4  illustrates a flow of the method of manufacturing the display unit according to this embodiment. The method will be described below step by step ( FIGS. 5A to 9C ). 
     (Process of Forming Lower Electrode  14 ) 
     First, the TFT layer  12  and the planarization layer  13  are formed in this order on the substrate  11  made of the foregoing material. Next, for example, a transparent conductive film made of ITO is formed on an entire surface of the substrate  11 , and the conductive film is patterned to from the lower electrode  14  (step S 11 ). At this time, the lower electrode  14  is brought into conduction with a drain electrode of the driving transistor Tr 1  (the TFT layer  12 ) through a connection hole. 
     (Process of Forming Partition Wall  15 ) 
     Subsequently, after a film of an inorganic insulating material such as SiO 2  is formed on the planarization layer  13  and the lower electrode  14  by, for example, CVD (Chemical Vapor Deposition), a photosensitive resin is laminated on the film, and patterning is performed on the photosensitive resin to form the partition wall  15  (step S 12 ). 
     After the partition wall  15  is formed, a front surface, i.e., a surface where the lower electrode  14  and the partition wall  15  are formed of the drive substrate  11  is subjected to oxygen plasma treatment to remove contaminants such as an organic matter adhered to the surface, thereby improving wettability (step S 13 ). More specifically, the substrate  11  is heated at a predetermined temperature, for example, from about 70° C. to about 80° C. both inclusive, and then is subjected to plasma treatment using oxygen as reactant gas (O 2  plasma treatment) under atmospheric pressure. 
     (Process of Forming Hole Injection Layer  161  and Hole Transport Layer  162 ) 
     After oxygen plasma treatment is performed, as illustrated in  FIG. 5A , the hole injection layer  161  and the hole transport layer  162  are formed to be shared by the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B (steps S 14  and S 15 ). A film of the foregoing material of the hole injection layer  161  is formed on the lower electrode  14  and the partition wall  15  by, for example, a spin coating method, and then is baked for one hour in the air to form the hole injection layer  161 . After the hole injection layer  161  is formed, a film is formed by a spin coating method in a similar manner, and then is baked for one hour at 180° C. under a nitrogen (N 2 ) atmosphere to form the hole transport layer  162 . 
     (Process of Forming Light-Emitting Layer  163 ) 
     After the hole transport layer  162  is provided, the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B are formed for the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B, respectively (step S 16 ). In this embodiment, the light-emitting layer  163  (the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B) is formed with use of masks (masks  21 R,  21 G, and  21 B that will be described later). As will be described in detail later, this makes it possible to suppress deterioration of the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B during manufacturing processes. 
     The light-emitting layer  163  may be formed, for example, in order of the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B. More specifically, first, as illustrated in  FIG. 5B , an entire surface of the hole transport layer  162  is coated with an ink including the foregoing material of the red light-emitting layer  163 R with use of, for example, a slit coating method to form a red material layer  163 RA (a first organic material layer). As the ink, an ink in which the material of the red light-emitting layer  163 R is dissolved in a solvent is used. The surface of the hole transport layer  162  may be coated with the ink by, for example but not limited to, a spin coating method, or an ink-jet method. In  FIG. 5B , the substrate  11 , the TFT layer  12 , the planarization layer  13 , the lower electrode  14 , and the partition wall  15  are omitted. This applies to  FIGS. 5C and 5D , and  FIGS. 8A to 9C . 
     Subsequently, as illustrated in  FIG. 5C , the mask  21 R is selectively formed in a region (a first region) where the red organic EL device  10 R is to be formed on the red material layer  163 RA. The mask  21 R is formed in contact with the red material layer  163 RA. A thickness of the mask  21 R may be, for example, 0.01 μm or more, preferably 0.1 μm or more. Thereafter, a portion exposed from the mask  21 R of the red material layer  163 RA is removed by, for example, wet etching ( FIG. 5D ). Thus, the red light-emitting layer  163 R with the same planar shape as that of the mask  21 R is formed. The portion exposed from the mask  21 R of the red material layer  163 RA may be removed by dry etching. The mask  21 R may be formed with use of, for example, a reverse offset printing method. For example, the reverse offset printing for the mask  21 R may be performed as follows. 
     First, as illustrated in  FIG. 6A , a flat-shaped blanket  31  is fixed on a stage  30 , and the blanket  31  is coated with an ink  21  with use of a slit coating head  33 . Thus, a transfer layer  21 A is formed on an entire surface of the blanket  31 . The transfer layer  21 A may be formed by a spin coating method instead of a slit coating method. The blanket  31  is made of a deformable material with high flexibility in order to obtain favorable contact with a printing target substrate (the substrate  11 ). More specifically, for example, the blanket used herein may be formed by forming a film of silicon rubber or a fluorine resin on a base made of, for example but not limited to, a resin film, glass, or metal by a spin coating method or a slit coating method and then firing the film. The ink  21  is prepared by mixing a material of the mask  21 R with a solvent. Examples of the material of the mask  21 R may include a fluorine-based resin, a water-soluble resin, and an alcohol-soluble resin. As the solvent, for example but not limited to, a fluorine-based solvent, water, or an alcohol-based solvent may be used. 
     Subsequently, as illustrated in  FIG. 6B , after a reverse printing plate (a plate  34 ) having protrusions and recessions in a predetermined pattern and the blanket  31  face each other with a predetermined spacing in between, as illustrated in  FIG. 6C , the transfer layer  21 A is pressed against the plate  34 . A process of bringing the plate  34  and the transfer layer  21 A (the blanket  31 ) into contact with each other is performed by pressure compression, i.e., jetting compressed gas from a back surface of the blanket  31  to push out the compressed gas, thereby sequentially adhering them from a central portion to an end portion (a compressed gas pressurizing method). Thus, the plate  34  and the blanket  31  are adhered to each other without entry of air bubbles therebetween. As the plate  34 , a plate with recessions corresponding to the pattern of the red light-emitting layer  163 R is used. 
     Thereafter, when the blanket is separated from the plate  34  as illustrated in  FIG. 7A , a non-printing portion  21 B is transferred from the blanket  31  to the protrusions of the plate  34 , and at the same time, a transfer layer  21 C having a pattern corresponding to the recessions of the plate  34  is formed. 
     Subsequently, after the transfer layer  21 C of the blanket  31  and the substrate  11  face each other to be aligned as illustrated in  FIG. 7B , they are brought into contact with each other as illustrated in  FIG. 7C . The contact between the blanket  31  and the substrate  11  (the red material layer  163 RA) is performed by the foregoing pressure compression. 
     After the transfer layer  21 C and the substrate  11  is brought into contact with each other, the transfer layer  21 C may be transferred to the substrate  11  while being heated. When the transfer layer  21 C is heated at, for example, a glass-transition temperature (Tg) of a resin material forming the transfer layer  21 C or higher, viscoelasticity of the resin material is changed. In a case where the material of the mask  21 R, i.e., the transfer layer  21 C is rigid, heating the transfer layer  21 C makes it easy to deform the transfer layer  21 C along a shape with protrusions and recessions formed by the lower electrode  14  and other layers on the substrate  11 . 
     Finally, when the blanket  31  is separated from the substrate  11  as illustrated in  FIG. 7D , the transfer layer  21 C (the mask  21 R) is printed on the substrate  11  (the red material layer  163 RA). Such a reverse offset printing method makes it possible to form the mask  21 R in contact with the red material layer  163 RA. 
     The mask  21 R (and the masks  21 G and  21 B that will be described later) may be formed by, for example but not limited to, flexographic printing, gravure printing, gravure offset printing, offset printing, or screen printing instead of the reverse offset printing method. The mask  21 R may be formed with use of, for example but not limited to, an ink-jet method, a nozzle printing method, or a laser transfer method. 
     For example, the green light-emitting layer  163 G may be formed as follows. First, as illustrated in  FIG. 8A , in a similar manner to the foregoing red material layer  163 RA, a green material layer  163 GA (a second organic material layer) made of the material of the green light-emitting layer  163 G is formed on the hole transport layer  162  where the red light-emitting layer  163 R is provided. At this time, a top of the mask  21 R may be covered with the green material layer  163 GA. Subsequently, after the mask  21 G is formed in a region (a second region) where the green organic EL device  10 G is to be formed on the green material layer  163 GA as illustrated in  FIG. 8B , a portion exposed from the mask  21 G of the green material layer  163 GA is removed ( FIG. 8C ). The mask  21 G is formed in contact with the green material layer  163 GA. Thus, the green light-emitting layer  163 G with the same planar shape as that of the mask  21 G is formed. The mask  21 G may be formed by, for example, a reverse offset printing method in a similar manner to that described in the foregoing mask  21 R. 
     For example, the blue light-emitting layer  163 B may be formed as follows. First, as illustrated in  FIG. 8D , in a similar manner to the foregoing red material layer  163 RA, a blue material layer  163 BA (a second organic material layer) made of the material of the blue light-emitting layer  162  is formed on the hole transport layer  162  where the red light-emitting layer  163 R and the green light-emitting layer  163 G are provided. At this time, tops of the masks  21 R and  21 G may be covered with the blue material layer  163 BA. Subsequently, after the mask  21 B is formed in a region (a second region) where the blue organic EL device  10 B is to be formed on the blue material layer  163 BA as illustrated in  FIG. 9A , a portion exposed from the mask  21 B of the blue material layer  163 BA is removed ( FIG. 9B ). The mask  21 B is formed in contact with the blue material layer  163 BA. Thus, the blue light-emitting layer  163 B is formed. The mask  21 G may be formed by, for example, a reverse offset printing method in a similar manner to that described in the foregoing mask  21 R. The red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B may be formed in any order, and, for example, they may be formed in order of the green light-emitting layer  163 G, the red light-emitting layer  163 R, and the blue light-emitting layer  163 B. 
     After the light-emitting layer  163  (the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B) is thus formed, the masks  21 R,  21 G, and  21 B are dissolved in, for example, a solvent to be removed ( FIG. 9C ). The solvent may be selected according to the material of the mask  21 R,  21 G, and  21 B, and as the solvent, a solvent allowing the masks  21 R,  21 G, and  21 B to be dissolved therein and not allowing the light-emitting layer  163  to be dissolved therein may be preferably used. Examples of such a solvent may include a fluorine-based solvent, water, and an alcohol-based solvent. 
     (Process of Forming Electron Transport Layer  164 , Electron Injection Layer  165 , and Upper Electrode  17 ) 
     After the masks  21 R,  21 G, and  21 B are removed, the electron transport layer  164 , the electron injection layer  165 , and the upper electrode  17  made of the foregoing materials are formed in this order on the light-emitting layer  163  by, for example, an evaporation method (steps S 17 , S 18 , and S 19 ). The electron transport layer  164 , the electron injection layer  165 , and the upper electrode  17  may be successively formed in a same film formation apparatus. 
     After the upper electrode  17  is formed, a protective layer is formed by, for example, an evaporation method or a CVD method. At this time, a film formation temperature may be preferably set to room temperature in order to suppress a decline in luminance associated with deterioration of the light-emitting layer  163  and other layers, and film formation may be preferably performed under a condition that stress on a film is minimized in order to prevent peeling of the protective layer. The light-emitting layer  163 , the electron transport layer  164 , the electron injection layer  165 , the upper electrode  17 , and the protective layer may be preferably formed successively in a same film formation apparatus without being exposed to the air in order to suppress deterioration caused by atmospheric moisture. 
     After the protective layer is formed, the sealing substrate is bonded onto the protective layer with the adhesive layer in between. Thus, the display unit  1  is completed. 
     [Functions and Effects of Display Unit  1 ] 
     In the display unit  1 , the scanning signal is supplied from the scanning line drive circuit  130  to each pixel through the gate electrode of the writing transistor Tr 2 , and the image signal supplied from the signal line drive circuit  120  is retained in the retention capacitor Cs through the writing transistor Tr 2 . In other words, on-off control of the driving transistor Tr 1  is performed in response to the signal retained in the retention capacitor Cs, and a drive current Id is thereby injected into the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B to cause light emission by the recombination of holes and electrons. 
     At this time, the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B emit red light (with a wavelength from 620 nm to 750 nm both inclusive), green light (with a wavelength from 495 nm to 570 nm both inclusive), and blue light (with a wavelength from 450 nm to 495 nm both inclusive), respectively. 
     In the method of manufacturing the display unit  1  according to this embodiment, the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B are patterned into the same shapes as the planar shapes of the masks  21 R,  21 G, and  21 B provided on the substrate  11 , respectively ( FIGS. 5C to 9B ). This makes it possible to suppress deterioration of the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B. Description about this will be given below. 
       FIGS. 10A to 10D  illustrate a method of manufacturing a display unit according to a comparative example in order. A light-emitting layer (a red light-emitting layer  1163 R, a green light-emitting layer  1163 G, and a blue light-emitting layer  1163 B) of this display unit is formed as follows by a reverse offset printing method. First, an ink is prepared by dissolving a material of the red light-emitting layer  1163 R in a solvent, and the entire surface of the blanket  31  is coated with this ink (refer to  FIG. 6A ). Subsequently, the red light-emitting layer  1163 R is formed into a predetermined pattern on the blanket  31  with use of a plate (refer to  FIGS. 6B to 7B ). Thereafter, the blanket  31  and the hole transport layer  162  face each other ( FIG. 10A ), and they are brought into contact with each other to transfer the red light-emitting layer  1163 R to the hole transfer layer  162  (the substrate) ( FIG. 10B ). The green light-emitting layer  1163 G and the blue light-emitting layer  1163 B are formed in a similar manner ( FIGS. 10C and 10D ). 
     In a process of forming the red light-emitting layer  1163 R (the green light-emitting layer  1163 G and the blue light-emitting layer  1163 B) with use of such a reverse offset printing method, the red light-emitting layer  1163 R is formed on the blanket  31 . In other words, after the red light-emitting layer  1163 R comes into contact with the blanket  31  ( FIG. 10A ), the red light-emitting layer  1163 R is transferred to the hole transport layer  162 . Impurities may be mixed into the light-emitting layer  1163 R (or the green light-emitting layer  1163 G or the blue light-emitting layer  1163 B) due to this contact with the blanket  31  to cause deterioration in characteristics such as light emission efficiency and light emission lifetime. The impurities may include, but not limited to, silicon oil included in silicon rubber on the surface of the blanket  31 , and siloxane. The silicon oil is one of compounding agents added to silicone polymer as a principal material. Siloxane is an unreacted material that remains without being polymerized upon manufacturing of silicon rubber. 
     Moreover, as the solvent used to prepare the ink, for example but not limited to, aromatic hydrocarbon may be used; however, since the solvent has high compatibility with the blanket  31  (such as silicon rubber on the surface), the entire surface of the blanket  31  may be impregnated with the ink. The ink (an ink  1163 RE) having permeated the blanket  31  is also adhered to a portion other than the red light-emitting layer  1163 R on the hole transport layer  162  ( FIG. 10B ). When the green light-emitting layer  1163 G or the blue light-emitting layer  1163 B is formed on the ink  1163 RE, color mixture is caused to cause a decline in color purity. Inks  1163 GE and  1163 BE having permeated the blanket  31  when the green light-emitting layer  1163 G and the blue light-emitting layer  1163 B are formed may also cause color mixture in a similar manner ( FIGS. 10C and 10D ). 
     On the other hand, since the foregoing red light-emitting layer  163 R, the foregoing green light-emitting layer  163 G, and the foregoing blue light-emitting layer  163 B are patterned with use of the shapes of the masks  21 R,  21 G, and  21 B, patterning with use of the blanket  31  and the plate is unnecessary. In other words, the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B are formed without contact with the blanket  31 . This makes it possible to prevent entry of impurities from the blanket  31  to the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B. Moreover, this makes it possible to prevent color mixture caused by permeation of the ink into the blanket  31 . When the masks  21 R,  21 G, and  21 B are transferred, the blanket  31  may come into contact with parts of the red material layer  163 RA, the green material layer  163 GA, and the blue material layer  163 BA. However, the red material layer  163 RA, the green material layer  163 GA, and the blue material layer  163 BA other than portions (portions that are to serve as the red light-emitting layer  163 G, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B) directly below the mask  211 R,  21 G, and  21 B are removed. Therefore, a portion in contact with the blanket  31  does not have an influence on characteristics of each device. 
     Further, since the masks  21 R,  21 G, and  21 B are formed by a printing method, compared to a metal mask, this makes it possible to form the masks  21 R,  21 G, and  21 B with higher accuracy. Accordingly, this makes it possible to form a high-definition display. In addition, the printing method may be easily applicable to a large-size substrate process. Furthermore, since it is possible to perform the printing method under atmospheric pressure, facilities such as a large-size vacuum apparatus are unnecessary, and this makes it possible to reduce facility cost and power consumption. 
     In particular, in the reverse offset printing method in the printing method, high-precision printing with a printing line width of several μm to 10 μm and alignment accuracy of about several μm is possible; therefore, the reverse offset printing method is a suitable method for manufacturing of a high-definition organic EL display unit. For example, a display unit with 300 ppi or more (a pixel pitch of about 84 μm or less) may be manufactured with use of the reverse offset printing method. 
     Since, in this embodiment, the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B are patterned with use of the masks  21 R,  21 G, and  21 B in the foregoing manner, deterioration in characteristics such as light emission efficiency and light emission lifetime is preventable. Moreover, this makes it possible to mix inks of other emission colors into the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B, thereby suppressing color mixture. 
     In a case where the masks  21 R,  21 G, and  21 B are formed with use of flexographic printing, gravure printing, gravure offset printing, offset printing, screen printing, or any other printing, printing accuracy may be reduced, compared to the reverse offset printing method. However, in these methods, a plate cleaning process performed after every printing is unnecessary, and accordingly, cost reduction is possible. Moreover, an ink-jet method, a nozzle printing method, and a laser transfer method are methods allowing for printing without using a plate. Therefore, in a case where it is not necessary to form the masks  21 R,  21 G, and  21 B with high accuracy, these printing methods may be used to reduce cost. 
     For example, when the masks  21 R,  216 , and  21 B are formed with use of gravure offset printing, a smooth printing roll may be used. Providing the partition wall  15  with a height of about 0.1 μm to about 0.3 μm both inclusive allows for formation of the masks  21 R,  21 G, and  21 B by gravure offset printing. On the other hand, in a case where the masks  21 R,  21 G, and  21 B are formed by the ink-jet method, the partition wall  15  prevents outflow of the ink; therefore, for example, the partition wall  15  with a height of about 2 μm is necessary. Thus, depending on the configuration of the display unit, the method of forming the masks  21 R,  21 G, and  21 G may be selected. It is to be noted that, in, for example but not limited to, the gravure offset printing and the ink-jet method, it is difficult to form the masks  21 R,  21 G, and  21 B with a uniform thickness; however, this is less likely to exert an influence on the organic layer  16  (the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B). This is because as long as it is possible to protect the organic layer  16  during etching, the masks  21 R,  21 G, and  21 G sufficiently fulfill their functions. For example, in the gravure offset printing, the masks  21 R,  21 G, and  21 B are prone to have a sectional shape of which a central portion are raised, i.e., a protruded sectional shape because of fluidity of the ink and an influence of surface tension. Even in the ink-jet method, the thicknesses of the masks  21 R,  21 G, and  21 B are less likely to be uniform due to creeping-up of an ink along the partition wall  15 . 
     A portion exposed from the mask  21 R (or the mask  21 G or  21 B) of the red material layer  163 RA (or the green material layer  163 GA or the blue material layer  163 BA) may be removed by wet etching or dry etching depending on the situation. For example, in a case where there is a possibility that the light-emitting layer  163  and layers below the light-emitting layer  163  in the organic layer  16  are deteriorated, wet etching may be preferably used. On the other hand, in the dry etching, control of side etching is easy, and flexibility in design of the pattern of the light-emitting layer  163  is improved. Moreover, there are a large number of kinds of etchable materials, and it is possible to easily etch the light-emitting layer  163  made of various materials. Moreover, while, in wet etching, a process of drying an etching liquid is necessary, in dry etching, this process is unnecessary. 
     Modification examples of this embodiment and other embodiments will be described below, and in the following description, like components are denoted by like numerals as of the foregoing embodiment, and will not be further described. 
     Modification Example 1 
       FIG. 11  illustrates a sectional configuration of a main part of a display unit (a display unit  1 A) manufactured by a method according to Modification Example 1 of the foregoing embodiment. A partition wall (a partition wall  15 A) of the display unit  1 A has liquid repellency. The display unit  1 A has a similar configuration to that of the display unit  1  except for this point. In  FIG. 11 , the TFT layer  12 , the planarization layer  13 , the hole injection layer  161 , the hole transport layer  162 , the electron transport layer  164 , the electron injection layer  165 , and the upper electrode  17  (all of which are illustrated in  FIG. 1 ) are omitted. This applies to  FIGS. 12A to 13C  that will be described later. 
     In a similar manner to that in the partition wall  15 , the partition wall  15 A is configured to secure insulation between the lower electrode  14  and the upper electrode  17  and to form a light emission region into a desired shape. The partition wall  15 A may have a tapered shape, and an aperture size is increased from the lower electrode  14  toward the upper electrode. The partition wall  15 A may have any shape, and the aperture size may be uniform. The partition wall  15 A may be made of, for example, a liquid-repellent material. The partition wall  15 A may be made of, for example, a fluorine-based resin material. The liquid repellency of the wall partition  15 A may be enhanced by performing liquid-repellent treatment on, for example but not limited to, a polyimide resin. Examples of the liquid-repellent treatment may include fluorine plasma treatment such as tetrafluoromethane (CF 4 ) plasma treatment. 
     For example, the display unit  1 A including such a partition wall  15 A may be manufactured as follows ( FIGS. 12A to 13C ). 
     First, the TFT layer  12 , the planarization layer  13 , and the lower electrode  14  are formed in this order on the substrate  11  in a similar manner to that described in the foregoing display unit  1 . Subsequently, after, for example, a polyimide resin is patterned, the polyimide resin is subjected to tetrafluoromethane plasma treatment to form the partition wall  15 A. The partition wall  15 A may be formed of a fluorine-based resin material. It is to be noted that inventors of the disclosure have confirmed that a contact angle of water with respect to the partition wall  15 A made of the fluorine-based resin material is 95°, and a contact angle of water with respect to the partition wall  15 A configured by performing tetrafluoromethane (CF 4 ) plasma treatment on the polyimide resin is 106°. At that time, a contact angle of water with respect to the polyimide resin was 77°. 
     After the partition wall  15 A is formed, the hole injection layer  161  and the hole transport layer  162  are formed in this order. Subsequently, the light-emitting layer  163  is formed, for example, in order of the green light-emitting layer  163 G, the red light-emitting layer  163 R, and the blue light-emitting layer  163 B. More specifically, first, the entire surface of the hole transport layer  161  is coated with an ink in which the material of the green light-emitting layer  163 G is dissolved in a solvent to form the green material layer  163 GA ( FIG. 12A ). At this time, while the solvent included in the green material layer  163 GA is dried, the green material layer  163 GA with which the surface of the partition wall  15 A is coated is repelled by liquid repellency of the partition wall  15 A to be moved between adjacent partition walls  15 A ( FIG. 12B ). In other words, a side surface of the green material layer  163 GA is covered with the partition wall  15 A. The concentration of the material of the green light-emitting layer  163 G in the ink may be, for example, from about 1% to about 3% both inclusive. 
     As the solvent allowing the material of the green light-emitting layer  163 G to be dissolved therein, a solvent having a contact angle of 50° or more with respect to the partition wall  15 A may be preferably used. Examples of such a solvent may include Anisole, Tetralin, 1,3-dimethoxy benzene, 2-tert-butylphenol, and 1-Methylnaphthalene. These solvents have a contact angle of 50° or more with respect to the partition wall  15 A formed by performing tetrafluoromethane (CF 4 ) plasma treatment on the polyimide resin. 
     After the green material layer  163 GA is moved between the partition walls  15 A, as illustrated in  FIG. 12C , the mask  21 G is formed in a region where the green organic EL device  10 G is to be formed with use of, for example, a reverse offset printing method. Subsequently, a portion other than the region where the mask  21 G is provided of the green material layer  163 GA is removed by, for example, etching to form the green light-emitting layer  163 G ( FIG. 13A ). 
     Subsequently, the entire surface of the hole transport layer  162  is coated with an ink in which the material of the red light-emitting layer  163 R is dissolved in a solvent in a state in which a top surface of the green light-emitting layer  163 G is covered with the mask  21 G to form the red material layer  163 RA ( FIG. 13B ). In a similar manner to that in the green material layer  163 GA, the red material layer  163 RA is moved between adjacent partition walls  15 A by liquid repellency of the partition wall  15 A ( FIG. 13C ). Thereafter, in a similar manner to that in the foregoing green material layer  163 GA, a portion except for the region where the red organic EL device  10 R is to be formed of the red material layer  163 RA is removed with use of the mask  21 R ( FIG. 5C ) to form the red light-emitting layer  163 R. The blue light-emitting layer  163 B is formed with use of the mask  21 B ( FIG. 9A ) in a similar manner, and the masks  21 G,  21 R, and  21 B with which the top surfaces of the green material layer  163 GA, the red light-emitting layer  163 R, and the blue light-emitting layer  163 B are covered are removed. The green material layer  163 GA, the red light-emitting layer  163 R, and the blue light-emitting layer  163 B may be formed in any order, and, for example, they may be formed in order of the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B. 
     After the light-emitting layer  163  is formed in such a manner, in a similar manner to that in the display unit  1 , the electron transport layer  164 , the electron injection layer  165 , the upper electrode  17 , and the protective layer are formed. Finally, the sealing substrate is bonded onto the substrate  11  where these layers are provided to complete the display unit  1 A. 
     In the method of manufacturing the display unit  1 A, since the partition wall  15 A has liquid repellency, the green material layer  163 GA (the red material layer  163 RA and the blue material layer  163 BA) is moved between adjacent partition walls  15 A ( FIG. 12B ). Moreover, in a state in which the mask  21 G (the masks  21 R and  21 B) is provided, the ink of the light-emitting layer that is to be subsequently formed is applied ( FIG. 13B ). In other words, the green light-emitting layer  163 G is coated with an ink of the light-emitting layer (the red light-emitting layer  163 R and the blue light-emitting layer  163 B) in a next process in a state in which a side surface and a top surface of the green light-emitting layer  163 G are coated with the partition wall  15 A and the mask  21 G, respectively. This applies to the red light-emitting layer  163 R. This makes it possible to prevent the green light-emitting layer  163 G from being dissolved in a solvent contained in this ink, thereby suppressing the occurrence of a pattern failure. Accordingly, the method of manufacturing the display unit  1 A makes it possible to form the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B into a precise pattern. 
     Second Embodiment 
       FIGS. 14A to 16C  illustrate a method of manufacturing the display unit  1  according to a second embodiment of the technology. In  FIGS. 14A to 16C , the substrate  11 , the TFT layer  12 , the planarization layer  13 , the lower electrode  14 , and the partition wall  15  (all of which are illustrated in  FIG. 1 ) are not illustrated. In this method, the light-emitting layer  163  is formed with use of a liquid-repellent mask (masks  22 R,  22 G, and  22 B). The display unit  1  is manufactured in a similar manner to that in the foregoing first embodiment except for this point. 
     First, the TFT layer  12 , the planarization layer  13 , the lower electrode  14 , the partition wall  15 , the hole injection layer  161 , and the hole transport layer  162  are formed in this order on the substrate  11  in a similar manner to that in the display unit  1  according to the foregoing first embodiment. Subsequently, for example, the light-emitting layer  163  is formed in order of the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B. 
     More specifically, first, the mask  22 R having an aperture  22 RM in a region (a first region) where the red organic EL device  10 R is to be formed is formed on the hole transport layer  162  ( FIG. 14A ). The mask  22 R is formed in contact with the hole transport layer  162  with use of, for example, a reverse offset printing method. The mask  22 R (and the masks  22 G and  22 B that will be described later) may be formed by not only the reverse offset printing method but also, for example but not limited to, flexographic printing, gravure printing, gravure offset printing, offset printing, or screen printing. The mask  22 R may be formed with use of, for example but not limited to, an ink-jet method, a nozzle printing method, or a laser transfer method. This mask  22 R has liquid repellency, and may be formed in contact with the hole transport layer  162  with use of, for example, a fluorine-based resin. Although the mask  22 R may be formed with use of, for example but not limited to, a water-soluble resin and an alcohol-soluble resin, in a case where the resin has low liquid repellency, the resin may be preferably subjected to liquid-repellent treatment such as fluorine plasma treatment. The mask  22 R may be formed of a resist material. 
     After the mask  22 R is formed, the hole transport layer  162  is coated with an ink in which the material of the red light-emitting layer  163 R is dissolved in a solvent. At this time, the ink with which the mask  22 R is coated is repelled by the liquid repellency of the mask  22 R to be moved to a portion corresponding to the aperture  22 RM of the mask  22 R, i.e., the region where the red organic EL device  10 R is to be formed. Thus, the red light-emitting layer  163 R (a first organic layer) is formed ( FIG. 14B ). 
     Subsequently, as illustrated in  FIG. 14C , the mask  22 R is dissolved in, for example, a solvent to be removed. This solvent may be selected according to the material of the mask  22 R, and a solvent allowing the mask  22 R to be dissolved therein and not allowing the red light-emitting layer  163 R to be dissolved therein may be preferably used. Examples of such a solvent may include a fluorine-based solvent, water, and an alcohol-based solvent. Even if the ink for formation of the red light-emitting layer  163 R remains on the mask  22 R, the ink is removed together with the mask  22 R in this process. This applies to the masks  22 G and  22 B that will be described later. 
     After the mask  22 R is removed, as illustrated in  FIG. 15A , the liquid-repellent mask  22 G having an aperture  22 GM in a region where the green organic EL device  10 G is to be formed is formed on the hole transport layer  162 . The mask  22 G is formed in contact with the hole transport layer  162 , and is also formed on the red light-emitting layer  163 R. The mask  22 G is formed with use of a similar material to that of the foregoing mask  22 R by, for example, a reverse offset printing method. 
     After the mask  22 G is formed, the hole transport layer  162  is coated with an ink in which the material of the green light-emitting layer  163 G is dissolved in a solvent. At this time, the ink with which the mask  22 G is coated is repelled by the liquid repellency of the mask  22 G to be moved in a portion corresponding to the aperture  22 GM of the mask  22 G, i.e., the region where the green organic EL device  10 G is to be formed. Thus, the green light-emitting layer  163 G (a second organic layer) is formed ( FIG. 15B ). 
     Subsequently, as illustrated in  FIG. 15C , the mask  22 G is dissolved in, for example, a solvent to be removed. As this solvent, a similar solvent to that used in the foregoing mask  22 R may be used. After the mask  22 G is removed, the mask  22 B having an aperture  22 BM in a region where the blue organic EL device  10 B is to be formed is formed on the hole transport layer  162  ( FIG. 16A ). The mask  22 B is formed in contact with the hole transport layer  162 , and is also formed on the red light-emitting layer  163 R and the green light-emitting layer  163 G. The mask  22 B is formed with use of a similar material to that of the foregoing mask  22 R by, for example, a reverse offset printing method. 
     After the mask  22 B is formed, the hole transport layer  162  is coated with an ink in which the material of the blue light-emitting layer  163 B is dissolved in a solvent. At this time, the ink with which the mask  22 B is coated is repelled by the liquid repellency of the mask  22 B to be moved to a portion corresponding to the aperture  22 BM of the mask  22 B, i.e., the region where the blue organic EL device  10 B is to be formed. Thus, the blue light-emitting layer  163 B (the second organic layer) is formed to complete the light-emitting layer  163  ( FIG. 16B ). Thereafter, the mask  22 B is dissolved in, for example, a solvent to be removed ( FIG. 16C ). As this solvent, a similar solvent to that used in the foregoing mask  22 R may be used. The red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B may be formed in any order, and, for example, they may be formed in order of the green light-emitting layer  163 G, the red light-emitting layer  163 R, and the blue light-emitting layer  163 B. After the light-emitting layer  163  is provided in such a manner, in a similar manner to that in the display unit  1  according to the foregoing first embodiment, the electron transport layer  164 , the electron injection layer  165 , the upper electrode  17 , and the protective layer are formed. Finally, the sealing substrate is bonded onto the substrate  11  where these layers are provided to complete the display unit. 
     In this method of manufacturing the display unit  1 , since the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B are formed in selective regions (the apertures  22 RM,  22 GM, and  22 BM of the masks  22 R,  22 G, and  22 B) with use of the shapes of the liquid-repellent masks  22 R,  22 G, and  22 B, patterning using the blanket and the plate ( FIGS. 10A to 10D ) is unnecessary. In other words, in a similar manner to that in the foregoing first embodiment, this makes it possible to prevent entry of impurities from the blanket  31  to the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B. Accordingly, this makes it possible to prevent deterioration in characteristics such as light emission efficiency and light emission lifetime of the red organic EL device  10 R, the green organic EL device  10 G, and the blue organic EL device  10 B. Moreover, this makes it possible to prevent color mixture caused by permeation of the ink into the blanket  31 . 
     Modification Example 2 
       FIGS. 17A to 18C  illustrate a method of manufacturing the display unit  1  according to Modification Example 2. In  FIGS. 17A to 18C , the substrate  11 , the TFT layer  12 , the planarization layer  13 , the lower electrode  14 , and the partition wall  15  (all of which are illustrated in  FIG. 1 ) are not illustrated. In this method, after a top surface and a side surface of the formed light-emitting layer (the red light-emitting layer  163 R and the green light-emitting layer  163 G) are covered with a mask (masks  23 G and  23 B), an ink for formation of the light-emitting layer (the green light-emitting layer and the blue light-emitting layer  163 B) in the following process is applied. The display unit  1  is manufactured in a similar manner to that in the foregoing second embodiment except for this point. 
     First, in a similar manner to that in the display unit  1  according to the foregoing first embodiment, the TFT layer  12 , the planarization layer  13 , the lower electrode  14 , the partition wall  15 , the hole injection layer  161 , and the hole transport layer  162  are formed in this order on the substrate  11 . Subsequently, for example, the light-emitting layer  163  is formed in order of the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B. 
     More specifically, first, in a similar manner to that described in the foregoing second embodiment, the red light-emitting layer  163 R is formed ( FIGS. 14A to 14C ). Subsequently, as illustrated in  FIG. 17A , the liquid-repellent mask  23 G having an aperture  23 GM in a region where the green organic EL device  10 G is to be formed is formed on the hole transport layer  162 . At this time, the mask  23 G is formed to cover the top surface and the side surface of the red light-emitting layer  163 R. The mask  23 G is formed in contact with the hole transport layer  162  with use of a similar material to that described in the foregoing masks  22 R,  22 G, and  22 B by a reverse offset printing method. The mask  23 G (and the mask  23 B that will be described later) may be formed by not only the reverse offset printing method but also, for example but not limited to, flexographic printing, gravure printing, gravure offset printing, offset printing, or screen printing. The mask  23 G may be formed with use of, for example not limited to, an ink-jet method, a nozzle printing method, or a laser transfer method. 
     After the mask  23 G is formed, as illustrated in  FIG. 17B , the hole transport layer  162  is coated with an ink in which the material of the green light-emitting layer  163 G is dissolved in a solvent to form the green light-emitting layer  163 G. At this time, since the side surface of the red light-emitting layer  163 R is covered with the mask  23 G, this makes it possible to prevent entry of the ink into the red light-emitting layer  163 R, thereby preventing side etching of the red light-emitting layer  163 R by the ink. In particular, in a case where the solvent allowing the material of the green light-emitting layer  163 G to be dissolved therein has high solvent power for a light-emitting material, use of such a mask  23 G is effective as a method of preventing side etching of the red light-emitting layer  163 R. 
     Subsequently, as illustrated in  FIG. 17C , the mask  23 G is dissolved in, for example, a solvent to be removed. As this solvent, a similar solvent to that described in the foregoing masks  22 R,  22 G, and  22 B may be used. 
     After the mask  23 G is removed, the liquid-repellent mask  23 B having an aperture  23 BM in a region where the blue organic EL device  10 B is to be formed is formed on the hole transport layer  162  ( FIG. 18A ). The mask  23 B is formed to cover the top surfaces and the side surfaces of the red light-emitting layer  163 R and the green light-emitting layer  163 G. The mask  23 B is formed in contact with the hole transport layer  162  with use of a similar material to that described in the foregoing masks  22 R,  22 G, and  22 B by, for example, a reverse offset printing method. 
     After the mask  23 B is formed, the hole transport layer  162  is coated with an ink in which the material of the blue light-emitting layer  163 B is dissolved in a solvent to form the blue light-emitting layer  163 B ( FIG. 18B ). At this time, in a similar manner to that described in the mask  23 G, the side surfaces of the red light-emitting layer  163 R and the green light-emitting layer  163 G are covered with the mask  23 B; therefore, entry of the ink into the red light-emitting layer  163 R and the green light-emitting layer  163 G is suppressed. 
     Thereafter, as illustrated in  FIG. 18C , the mask  23 B is dissolved in, for example, a solvent to be removed. As this solvent, a similar solvent to that described in the foregoing masks  22 R,  22 G, and  22 B may be used. After the light-emitting layer  163  is provided in such a manner, in a similar manner to that in the display unit  1  according to the foregoing first embodiment, the electron transport layer  164 , the electron injection layer  165 , the upper electrode  17 , and the protective layer are formed. Finally, the sealing substrate is bonded onto the substrate  11  where these layers are provided to complete the display unit  1 . 
     In this method of manufacturing the display unit  1 , after the side surface of the red light-emitting layer  163 R is covered with the mask  23 G, an ink for formation of the green light-emitting layer  163 G is applied. Moreover, after the side surfaces of the red light-emitting layer  163 R and the green light-emitting layer  163 G are covered with the mask  23 B, an ink for formation of the blue light-emitting layer  163 B is applied. Thus, this makes it possible to prevent entry of the ink from the side surface of the light-emitting layer in the following process. 
     In a case where only the top surface of the formed light-emitting layer is covered with a mask, an ink used in the following process may enter from the side surface of the light-emitting layer to cause side etching. When the masks  23 G and  23 B are formed to cover the side surfaces of the red light-emitting layers  163 R and the green light-emitting layer  163 G, this makes it possible to prevent side etching, thereby suppressing the occurrence of a pattern failure. Accordingly, this method of manufacturing the display unit  1  makes it possible to form the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B into a precise pattern. 
     Modification Example 3 
     Modification Example 3-1 
       FIG. 19  illustrates a configuration of a display unit (a display unit  2 ) manufactured by a method according to Modification Example 3. This display unit  3  is a so-called hybrid organic EL display unit, in which a blue light-emitting layer (a blue light-emitting layer  263 B) is provided to be shared by the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B. The display unit  2  has a similar configuration to that of the display unit  1  according to the foregoing first embodiment except for this point. 
     The light-emitting layer  263  of the display unit  2  is configured of the red light-emitting layer  163 R of the red organic EL device  10 R, the green light-emitting layer  163 G of the green organic EL device  10 G, and the common blue light-emitting layer  263 B shared by all devices (the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B). The blue light-emitting layer  263 B as a common layer is provided on the entire surface of the hole transport layer  162 . In other words, the blue light-emitting layer  263 B extends to regions of the red light-emitting layer  163 R and the green light-emitting layer  163 G, and each of the red light-emitting layer  163 R and the green light-emitting layer  163 G is provided between the hole transport layer  162  and the blue light-emitting layer  263 B. In other words, the red light-emitting layer  163 R and the green light-emitting layer  163 G are covered with the blue light-emitting layer  263 B. The blue light-emitting layer  263 B may be formed, for example, by doping an anthracene compound as a host material with a blue or green fluorescence pigment as a guest material. As the guest material, an organic light-emitting material such as a metal complex may be used. The blue light-emitting layer  263 B as a common layer may be formed by an evaporation method. This makes it possible to use a high-performance low-molecular-weight material for the blue light-emitting layer  263 B, and to enhance characteristics of the display unit  3 . 
     For example, the display unit  2  may be formed as follows. 
     First, in a similar manner to that in the display unit  1  according to the foregoing first embodiment, the TFT layer  12 , the planarization layer  13 , the lower electrode  14 , the partition wall  15 , the hole injection layer  161 , and the hole transport layer  162  are formed in this order on the substrate  11 . Subsequently, for example, in a similar manner to that described in the foregoing first embodiment, the red light-emitting layer  163 R and the green light-emitting layer  163 G are formed with use of the masks  21 R and  21 G ( FIGS. 5B to 8C ). After the masks  21 R and  21 G are removed, the blue light-emitting layer  263 B is formed on the entire surface of the hole transport layer  162  by, for example, an evaporation method. After the light-emitting layer  263  is provided in such a manner, in a similar manner to that in the display unit  1  according to the foregoing first embodiment, the electron transport layer  164 , the electron injection layer  165 , the upper electrode  17 , and the protective layer are formed. Finally, the sealing substrate is bonded onto the substrate  11  where these layers are provided to complete the display unit  2 . 
     This method of manufacturing the display unit  3  makes it possible to form the blue light-emitting layer  263 B by the evaporation method, thereby using the low-molecular-weight material for the blue light-emitting layer  263 B, and enhancing characteristics of the display unit  3 . 
     Modification Example 3-2 
     The red light-emitting layer  163 R and the green light-emitting layer  163 G may be formed with use of the masks  22 R and  22 G in a similar manner to that described in the foregoing second embodiment ( FIGS. 14A to 15C ). 
     Modification Example 3-3 
     The red light-emitting layer  163 R and the green light-emitting layer  163 G may be formed with use of the masks  22 R and  23 G in a similar manner to that described in the foregoing second embodiment and the foregoing Modification Example 2 ( FIGS. 17A to 17C ). 
     Modification Example 3-4 
     The red light-emitting layer  163 R and the green light-emitting layer  163 G may be formed by a combination of the method described in the foregoing first embodiment and the methods described in the foregoing second embodiment and the foregoing Modification Example 2 ( FIGS. 20A to 20D ). In  FIGS. 20A to 20D , the substrate  11 , the TFT layer  12 , the planarization layer  13 , the lower electrode  14 , and the partition wall  15  (all of which are illustrated in  FIG. 1 ) are not illustrated. 
     More specifically, first, in a similar manner to that described in the foregoing first embodiment, the red light-emitting layer  163 R is formed with use of the mask  21 R ( FIG. 20A ). Subsequently, in a similar manner to that described in the foregoing Modification Example 2, the mask  23 G having the aperture  23 GM in the region where the green organic EL device  10 G is to be formed is formed ( FIG. 20B ). The mask  23 G is formed to cover the top surface and the side surface of a laminate of the mask  21 R and the red light-emitting layer  163 R. Instead of the mask  23 G, the mask  22 G may be formed on the top surface of the mask  21 R ( FIG. 15A ). 
     After the mask  23 G is provided, an ink including the material of the green light-emitting layer  163 G is applied to form the green light-emitting layer  163 G ( FIG. 20C ). Thereafter, as illustrated in  FIG. 20D , the masks  21 R and  23 G are removed. This method makes it possible to form the light-emitting layer  263  without forming the mask on the hole transport layer  126  of the green organic EL device  10 G and forming the mask on the green light-emitting layer  163 G. Thus, in the green organic EL device  10 G, there is no possibility that a residue of a resin derived from the mask remains at an interface between the hole transport layer  126  and the green light-emitting layer  163 G and an interface between the green light-emitting layer  163 G and the electron transport layer  164 , which makes it possible to improve characteristics of the green organic EL device  10 G. 
     Modification Example 4 
     Modification Example 4-1 
       FIG. 21  illustrates a configuration of a display unit (a display unit  2 A) manufactured by a method according to Modification Example 4. The display unit  2 A includes a connection layer  266  between the hole transport layer  162  and the blue light-emitting layer  263 B. The connection layer  266  is provided to be shared by the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B. The display unit  2 A has a similar configuration to that of the display unit  2  according to the foregoing Modification Example 3 except for this point. 
     The connection layer  266  is provided between the red light-emitting layer  163 R and the blue light-emitting layer  263 B in the red organic EL device  10 R and between the green light-emitting layer  163 G and the blue light-emitting layer  263 B in the green organic EL device  10 G. The connection layer  266  is configured to confine triplet excitons formed in the red light-emitting layer  163 R and the green light-emitting layer  16 CG within the red light-emitting layer  163 R and the green light-emitting layer  163 G and to improve hole injection efficiency to the blue light-emitting layer  263 B. Depending on the entire device configuration, a thickness of the connection layer  266  may be preferably from 1 nm to 30 nm both inclusive, and more preferably from 1 nm to 15 nm both inclusive. 
     A material forming the connection layer  266  satisfies the following conditions. As a first condition, excitation triplet energy of the material forming the connection layer  266  is sufficiently larger than excitation triplet energy of the red light-emitting layer  163 R and the green light-emitting layer  163 G. This makes it possible to prevent the triplet excitons generated in the red light-emitting layer  163 R and the green light-emitting layer  163 G from being diffused into the blue light-emitting layer  263 B, thereby obtaining high-efficient phosphorescent emission. As a second condition, the material has high hole transport performance in order to improve hole injection efficiency to the blue light-emitting layer  263 B, and a large hole injection barrier is not formed between the hole transport layer  162  and the material. More specifically, when an energy difference between the ground state (SOH) of the connection layer  266  and the ground state (SOI) of the hole transport layer  162  is set to 0.4 eV or less, this makes it possible to maintain hole injection efficiency to the blue light-emitting layer  263 B. 
     Moreover, since the connection layer  266  is formed with use of the evaporation method, a low-molecular-weight material, specifically a monomer may be preferably used. One reason for this is that there is a possibility that a polymerized molecule such as an oligomer and a polymer is decomposed during evaporation. It is to be noted that the low-molecular-weight material used for the connection layer  266  may be configured with use of a mixture or laminate of two or more kinds of materials with different molecular weights. 
     Examples of the low-molecular-weight material used for the connection layer  266  may include a phosphorescent host material. For the connection layer  266 , for example, benzine, styrylamine, triphenylamine, porphyrin, triphenylene, azatriphenylene, tetracyanoquinodimethane, triazole, imidazole, oxadiazole, polyarylalkane, phenylenediamine, arylamine, oxazole, anthracene, fluorenone, hydrazone, stilbene, or a derivative thereof, or a heterocyclic conjugated monomer or oligomer such as a vinylcarbazole-based compound, a thiophene-based compound, or an aniline-based compound may be used. 
     In the display unit  2 A, providing such a connection layer  266  makes it possible to improve the characteristics of the display unit  2 A. In the display unit  2 A, in a similar manner to that described in the foregoing display unit  2 , after the red light-emitting layer  163 R and the green light-emitting layer  163 G are formed, for example, the connection layer  266  may be formed. Thereafter, the blue light-emitting layer  263 B is formed on an entire surface of the connection layer  266 . 
     Modification Example 4-2 
     The red light-emitting layer  163 R and the green light-emitting layer  163 G of the display unit  2 A may be formed with use of a combination of the method using the mask  21 R ( FIGS. 5B to 5D ) and the reverse offset printing method ( FIGS. 22A and 22B ). In  FIGS. 22A and 22B , the substrate  11 , the TFT layer  12 , the planarization layer  13 , the lower electrode  14 , and the partition wall  15  (all of which are illustrated in  FIG. 21 ) are not illustrated. 
     First, as described in the foregoing first embodiment ( FIGS. 5B to 5D ), the red light-emitting layer  163 R is formed on the hole transport layer  162  with use of the mask  21 R. The green light-emitting layer  163 G with a predetermined pattern is formed on the blanket  31  with use of the plate  34  ( FIG. 6B ). 
     Subsequently, the blanket  31  and the substrate  11  where the red light-emitting layer  163 R is formed face each other ( FIG. 22A ). Subsequently, after they are brought into contact with each other to transfer the green light-emitting layer  163 G to the hole transport layer  162  ( FIG. 22B ), the mask  21 R is removed. 
     In such a method of forming the red light-emitting layer  163 R and the green light-emitting layer  163 G, since the pattern of the green light-emitting layer  163 G is formed on the blanket  31 , it is not necessary to coat the substrate with an ink for formation of the green light-emitting layer  163 G (for example, refer to  FIGS. 8A and 16B ). Accordingly, there is no possibility that the red light-emitting layer  163 R is dissolved in a solvent contained in the ink, and this makes it possible to form the red light-emitting layer  163 R into a precise pattern. Moreover, since the mask  21 G ( FIG. 8B ) is unnecessary, this makes it possible to reduce the number of processes necessary for manufacturing. It is to be noted that there is a possibility that the ink for formation of the green light-emitting layer  163 G permeates the blanket  31  (an ink  163 GE), and the ink  163 GE is transferred to the region where the blue light-emitting device  10 B is to be formed. However, in the display unit  2 A, even if the ink  163 GE is transferred, the connection layer  266  is formed in contact with the ink  163 GE; therefore, the ink  163 GE has a hole transport function. This makes it possible to obtain high display characteristics without causing color mixture even in the blue light-emitting device  10 B. 
     After the green light-emitting layer  163 G is formed with use of the mask  21 G, the red light-emitting layer  163 R may be formed by the reverse offset printing method. 
     Modification Example 4-3 
     The red light-emitting layer  163 R and the green light-emitting layer  163 G of the display unit  2 A may be formed by a combination of the method using the mask  22 R ( FIGS. 14A to 14C ) and the reverse offset printing method ( FIGS. 23A and 23B ). In  FIGS. 23A and 23B , the substrate  11 , the TFT layer  12 , the planarization layer  13 , the lower electrode  14 , and the partition wall  15  (all of which are illustrated in  FIG. 21 ) are not illustrated. 
     More specifically, first, as described in the foregoing second embodiment ( FIGS. 14A to 14C ), the red light-emitting layer  163 R is formed on the hole transport layer  162  with use of the mask  22 R. The green light-emitting layer  163 G with a predetermined pattern is formed on the blanket  31  with use of the plate  34  ( FIG. 6B ). 
     Subsequently, the blanket  31  and the substrate where the red light-emitting layer  163 R is formed face each other ( FIG. 23A ). Subsequently, they are brought into contact with each other to transfer the green light-emitting layer  163 G to the hole transport layer  162  ( FIG. 23B ). 
     After the green light-emitting layer  163 G is formed with use of the mask  22 G, the red light-emitting layer  163 R may be formed by the reverse offset printing method. 
     Modification Example 4-4 
     The red light-emitting layer  163 R or the green light-emitting layer  163 G may be formed with use of a step formation layer  33  on the substrate  11  ( FIGS. 24A to 25D ). A case where the green light-emitting layer  163 G is formed with use of the mask (the mask  21 G) and the red light-emitting layer  163 R is formed with use of the step formation layer  33  will be described below. In  FIGS. 24B to 25D , the substrate  11 , the TFT layer  12 , the lower electrode  14 , and the partition wall  15  (all of which are illustrated in  FIG. 21 ) are not illustrated. 
     First, as illustrated in  FIG. 24A , the TFT layer  12  and the step formation layer  33  are formed in this order on the substrate  11 . The step formation layer  33  has a protrusion  33 A in the region where the red organic EL device  10 R is to be formed, and the protrusion  33 A is thicker by a height h than a portion other than the protrusion  33 A of the step formation layer  33 . The height h is 1/100 or more of a width of the portion (a recessed portion) other than the protrusion  33 A, or 500 nm or more, and may be, for example, about 2 μm. For example, the step formation layer  33  may be formed as follows. First, after the entire surface of the substrate  11  is coated with, for example, a photosensitive polyimide resin, a connection hole for connection between the lower electrode (the lower electrode  14  in  FIG. 1 ) and the TFT layer  12  is formed. Subsequently, a mask having an aperture in a portion other than the region where the red light-emitting device  10 R is to be formed is prepared, and half-exposure is performed with use of this mask. Thus, a part in a thickness direction of a portion corresponding to the aperture of the photosensitive polyimide resin is removed to from the step formation layer  33 . 
     After the step formation layer  33  is provided, the lower electrode  14  and the partition wall  15  are formed. Subsequently, the hole injection layer  161  and the hole transport layer  162  are formed in this order on an entire surface of the step formation layer  33  ( FIGS. 24B and 24C ). Subsequently, the entire surface of the hole transport layer  162  is coated with an ink including the material of the green light-emitting layer  163 G to form the green material layer  163 GA ( FIG. 24D ). 
     Subsequently, as illustrated in  FIG. 25A , the mask  2 G is formed in the region where the green organic EL device  10 G is to be formed by, for example, the reverse offset printing method. Thereafter, a portion exposed from the mask  21 R of the green material layer  163 GA is removed by, for example, wet etching or dry etching to form the green light-emitting layer  163 G ( FIG. 25B ). 
     Subsequently, after the entire surface of the blanket (not illustrated) is coated with an ink including the material of the red light-emitting layer  163 R, the blanket and the substrate  11  face each other. At this time, a portion in the region where the red organic EL device  10 R is to be formed of the hole transport layer  162  is disposed closer to the blanket than the other portion of the hole transport layer  162  by the protrusion  33 A of the step formation layer  33 . Thereafter, when the blanket is pressed against the substrate  11 , a portion on the protrusion  33 A of the hole transport layer  162  is selectively brought into contact with the blanket to form the red light-emitting layer  163 R ( FIG. 25C ). After the red light-emitting layer  163 R is formed, the mask  21 G is removed ( FIG. 25D ). 
     In this method, forming the step formation layer  33  makes it possible to selectively bring the ink including the material of the red light-emitting layer  163 R applied to the blanket in a solid film form as described above into contact with the region where the red organic EL device  10 R is to be formed. In other words, a process of forming a predetermined pattern on the blanket with use of the plate is unnecessary. This makes it possible to reduce the number of manufacturing processes and cost. 
     Modification Example 4-5 
     After the step formation layer  33  is formed, a water-repellent mask (the mask  22 G) described in the second embodiment may be formed ( FIGS. 26A to 26C ). In  FIGS. 26A to 26C , the substrate  11 , the TFT layer  12 , the lower electrode  14 , and the partition wall  15  (all of which are illustrated in  FIG. 21 ) are not illustrated. 
     More specifically, after the TFT layer  12 , the step formation layer  33 , the lower electrode  14 , the partition wall  15 , the hole injection layer  161 , and the hole transport layer  162  are formed in this order on the substrate  11 , the water-repellent mask  22 G having the aperture  22 GM in the region where the green organic EL device  10 G is to be formed is provided ( FIG. 26A ). Subsequently, the ink including the material of the green light-emitting layer  163 G is applied to form the green light-emitting layer  163 G ( FIG. 26B ). Thereafter, the red light-emitting layer  163 R is formed with use of the blanket ( FIG. 26C ). 
     Modification Example 5 
     Modification Example 5-1 
       FIG. 27  illustrates a configuration of a display unit (a display unit  3 ) manufactured by a method according to Modification Example 5. This display unit  3  includes hole transport layers  162 R,  162 G, and  162 B separated for each red organic EL device  10 R, each green organic EL device  10 G, and each blue organic EL device  10 B, respectively. The display unit  2  has a similar configuration to that of the display unit  1  according to the foregoing first embodiment except for this point. 
     The hole transport layer  162 R, the hole transport layer  162 G, and the hole transport layer  162 B are provided in the red organic EL device  10 R, the green organic EL device  10 G, and the blue organic EL device  10 B, respectively. Thicknesses of the hole transport layers  162 R,  162 G, and  162 B may be equal to or different from one another. The thicknesses of the hole transport layers  162 R,  162 G, and  162 B are adjustable according to respective devices (the red organic EL device  10 R, the green organic EL device  10 G, and the blue organic EL device  10 B, respectively) by patterning the hole transport layer  162 R,  162 G, and  162 B for the respective devices. For example, in a case where the display unit  3  is a top emission display unit, cavities of the red organic EL device  10 R, the green organic EL device  10 G, and the blue organic EL device  10 B are adjustable by the thicknesses of the hole transport layers  162 R,  162 G, and  162 B in addition to the thicknesses of the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B. This makes it possible to improve display characteristics of the display unit  3 . 
     For example, the hole transport layers  162 R,  162 G, and  162 B may be formed as follows ( FIGS. 28A to 28D ). In  FIGS. 28A to 28D , the substrate  11 , the TFT layer  12 , the planarization layer  13 , the lower electrode  14 , and the partition wall  15  (all of which are illustrated in  FIG. 27 ) are not illustrated. 
     First, after layers to the hole injection layer  161  are formed, a hole transport material layer  162 RA is formed on the entire surface of the hole injection layer  161 . Subsequently, as illustrated in  FIG. 28A , a mask  24 R is selectively formed in a region where the red organic EL device  10 R is to be formed on the hole transport material layer  162 RA. In a similar manner to that in the mask  21 R, the mask  24 R may be formed of, for example but not limited to, a fluorine resin, a water-soluble resin, or an alcohol-soluble resin by the reverse offset printing method. The mask  24 R (and a mask  24 G that will be described later) may be formed by not only the reverse offset printing method but also, for example but not limited to, flexographic printing, gravure printing, gravure offset printing, offset printing, or screen printing. The mask  24 R may be formed with use of, for example but not limited to, an ink-jet method, a nozzle printing method, or a laser transfer method. Subsequently, a portion exposed from the mask  24 R of the hole transport material layer  162 RA may be removed by, for example, wet etching or dry etching ( FIG. 28B ). Thus, the hole transport layer  162 R is formed. 
     Subsequently, a hole transport material layer  162 GA is formed on the hole injection layer  161  where the hole transport layer  162 R are provided ( FIG. 28C ). The mask  24 R may be covered with the hole transport material layer  162 GA. The hole transport material layer  162 GA may be made of the same material as that of the hole transport material layer  162 RA, and may have a different thickness from the thickness of the hole transport material layer  162 RA. Subsequently, as illustrated in  FIG. 28D , after the mask  24 G is formed in a region where the green organic EL device  10 G is to be formed on the hole transport material layer  162 GA, a portion exposed from the mask  24 G of the hole transport material layer  162 GA is removed (not illustrated). Thus, the hole transport layer  162 G is formed. The hole transport layer  162 B is formed in a similar manner. The hole transport layers  162 R,  162 G, and  162 B may be formed in any order. 
     Modification Example 5-2 
     The hole transport layers  162 R,  162 G, and  162 B may be formed with use of a water-repellent mask (masks  25 R and  25 G) ( FIGS. 29A to 29D ). In  FIGS. 29A to 29D , the substrate  11 , the TFT layer  12 , the planarization layer  13 , the lower electrode  14 , and the partition wall  15  (all of which are illustrated in  FIG. 27 ) are not illustrated. 
     More specifically, first, the water-repellent mask  25 R having an aperture  25 RM in a region where the red organic EL device  10 R is to be formed is formed on the hole injection layer  161 . In a similar manner to that in the mask  22 R described in the foregoing second embodiment, the mask  25 R may be formed of, for example, a fluorine-based resin with use of the reverse offset printing method ( FIG. 29A ). The mask  25 R (and the mask  25 G that will be described later) may be formed by not only the reverse offset printing method but also, for example but not limited to, flexographic printing, gravure printing, gravure offset printing, offset printing, or screen printing. The mask  23 G may be formed with use of, for example but not limited to, an ink-jet method, a nozzle printing method, or a laser transfer method. The mask  25 R may be formed by performing liquid-repellent treatment such as fluorine plasma treatment on a water-soluble resin or an alcohol-soluble resin. After the mask  25 R is provided, the hole injection layer  61  is coated with the ink including the material of the hole transport layer  162 R to form the hole transport layer  162 R ( FIG. 29B ). 
     Subsequently, as illustrated in  FIG. 29C , after the mask  25 R is dissolved in, for example, a solvent to be removed, the liquid-repellent mask  25 G having an aperture  25 GM in a region where the green organic EL device  10 G is to be formed is formed on the hole injection layer  161  ( FIG. 29D ). The mask  25 G is formed in contact with the hole injection layer  161 , and is also formed on the hole transport layer  162 R. After the mask  25 G is formed, the hole injection layer  161  is coated with an ink in which the material of the hole transport layer  162 G is dissolved in a solvent to form the hole transport layer  162 G (not illustrated). The hole transport layer  162 B is formed in a similar manner. 
     Modification Example 6 
     As illustrated in  FIG. 30 , the blue light-emitting layer of the display unit  3  may be a common blue light-emitting layer  263 B shared by the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B. The connection layer  266  may be formed between the blue light-emitting layer  263 B and the hole transport layers  162 R,  162 G, and  162 B. 
     In this display unit  3 , the hole transport layers  162 R,  162 G, and  162 B may be formed in a similar manner to that in the foregoing Modification Example 5. After the hole transport layers  162 R,  162 G, and  162 B are provided, the red light-emitting layer  163 R and the green light-emitting layer  163 G are formed in a similar manner to that described in the foregoing Modification Examples 4-1 to 4-5. Thereafter, the connection layer  266  and the blue light-emitting layer  263 B are formed in this order. 
     Modification Example 7 
     As illustrated in  FIG. 31 , the hole transport layer  162 R and  162 G may be formed in the red organic EL device  10 R and the green organic EL device  10 G, and the hole transport layer may be omitted in the blue organic EL device  10 B. The hole transport function of the blue organic EL device  10 B is maintained by forming the connection layer  266 . 
     Modification Example 8 
     Modification Example 8-1 
     As illustrated in  FIG. 32 , the hole transport layer  162 R may be formed only in the red organic EL device  10 R, and the hole transport layers of the blue organic EL device  10 B and the green organic EL device  10 G may be omitted. 
     For example, the hole transport layer  162 R, the red light-emitting layer  163 R, and the green light-emitting layer  163 G of the display unit  3  may be formed as follows in a similar manner to that described in the foregoing first embodiment ( FIGS. 33A to 35C ). In  FIGS. 33A to 35C , the substrate  11 , the TFT layer  12 , the planarization layer  13 , the lower electrode  14 , and the partition wall  15  (all of which are illustrated in  FIG. 32 ) are not illustrated. 
     First, after the hole transport layer  162  is provided on the entire surfaces of the substrate  11  and the hole injection layer  161 , the mask  24 R is formed in a region where the red organic EL device  10 R is to be formed on the hole transport layer  162  in the foregoing manner ( FIG. 33A ). Subsequently, a portion exposed from the mask  24 R of the hole transport layer  162  is removed to form the hole transport layer  162 R ( FIG. 33B ). Subsequently, after the mask  24 R is removed ( FIG. 33C ), the entire surface of the hole injection layer  161  is coated with the ink including the material of the red light-emitting layer  163 R to form the red material layer  163 RA ( FIG. 33D ). At this time, the red material layer  163 RA is formed to cover the hole transport layer  162 R. 
     After the red material layer  163 RA is provided, the mask  21 R is formed in a region where the red organic EL device  10 R is to be formed on the red material layer  163 RA ( FIG. 34A ), and a portion exposed from the mask  21 R of the red material layer  163 RA is removed ( FIG. 34B ). Thus, the red light-emitting layer  163 R is formed. Subsequently, the entire surface of the hole injection layer  161  is coated with the ink including the material of the green light-emitting layer  163 G to form the green material layer  163 GA ( FIG. 34C ). At this time, the mask  21 R may be covered with the green material layer  163 GA. 
     After the green material layer  163 GA is provided, the mask  21 G is formed in a region where the green organic EL device  10 G is to be formed on the green material layer  163 GA ( FIG. 35A ), and a portion exposed from the mask  21 G of the green material layer  163 GA is removed ( FIG. 35B ). Thus, the green light-emitting layer  163 G is formed. Thereafter, the masks  21 R and  21 G are removed ( FIG. 35C ). 
     Modification Example 8-2 
     The hole transport layer  162 R, the red light-emitting layer  163 R, and the green light-emitting layer  163 G may be formed by a combination of the method described in the foregoing first embodiment and the method described in the foregoing second embodiment ( FIGS. 36A to 36D ). In  FIGS. 36A to 36D , the substrate  11 , the TFT layer  12 , the planarization layer  13 , the lower electrode  14 , and the partition wall  15  (all of which are illustrated in  FIG. 32 ) are not illustrated. 
     After the red light-emitting layer  163 R is formed with use of the mask  21 R in the foregoing manner ( FIG. 34B ), the water-repellent mask  23 G having an aperture in the region where the green organic EL device  10 G is to be formed is formed ( FIG. 36A ). At this time, the mask  23 G is formed to cover a top surface and a side surface of a laminate configured of the hole transport layer  162 R, the red light-emitting layer  163 R, and the mask  23 R. 
     After the mask  23 G is formed, the ink including the material of the green light-emitting layer  163 G is provided on the hole injection layer  161  ( FIG. 36B ) to form the green light-emitting layer  163 G ( FIG. 36C ). At this time, as described in the foregoing Modification Example 2, since the side surface of the red light-emitting layer  163 R is covered with the mask  23 G, this makes it possible to suppress entry of the ink into the red light-emitting layer  163 R and to prevent side etching of the red light-emitting layer  163 R. 
     Third Embodiment 
     In a method of manufacturing the display unit  1  according to a third embodiment of the technology, films of materials of at least second and following light-emitting layers  163  (for example, the green light-emitting layer  163 G and the blue light-emitting layer  163 B in  FIGS. 8A to 9C ) that are to be formed are formed with use of an evaporation method. As the evaporation method, for example, a vacuum evaporation method may be used. A film of one kind of material may be formed with use of the evaporation method, or films of a plurality of materials may be formed by co-evaporation. The display unit  1  is manufactured in a similar manner to that in the foregoing first embodiment except for this point. 
     In a case where the light-emitting layer  163  is formed with use of a coating method such as a slit coating method, a spin coating method, and an ink-jet method, states illustrated in  FIGS. 37A to 37C  may be caused.  FIG. 37A  illustrates a state in which a part of the red light-emitting layer  163 R is dissolved in the solvent of the ink when the green material layer  163 GA is applied after providing the red light-emitting layer  163 R. There is a possibility that the pattern of the light-emitting layer  163  (the red light-emitting layer  163 R) formed previously is impaired in such a manner when the ink (the green material layer  163 GA) of the second and following light-emitting layers  163  is applied.  FIG. 37B  illustrates a state in which the green material layer  13 GA is repelled by the mask  21 R on the red light-emitting layer  163 R. In this case, the green material layer  163 GA is not allowed to be uniformly applied.  FIG. 37C  illustrates a creeping-up region  163 GR formed when the green material layer  163 GA is applied. A height difference is caused on the substrate  11  by providing the red light-emitting layer  163 R and the mask  21 R. The thickness of the green material layer  163 GA is increased in proximity to this height difference to form the creeping-up region  163 GR. Since there is a possibility that such a creeping-up region  163 GR exerts an influence on light emission characteristics, it is necessary to form the green light-emitting layer  163 G in a portion other than the creeping-up region  163 GR. 
     However, in this embodiment, the films of the materials of at least the second and following light-emitting layers  163  that are to be formed are formed on the substrate  11  with use of the evaporation method; therefore, this makes it possible to avoid the states illustrated in  FIGS. 37A to 37C . More specifically, since the evaporation method is used, the previously-formed light-emitting layer  163  (the red light-emitting layer  163 R) is not dissolved in the solvent, thereby maintaining a pattern with the same planar shape as that of the mask  21 R. Moreover, ink repellence caused by the mask  21 R and the formation of the creeping-up region  163 GR are preventable; therefore, the light-emitting layer  163  (the green light-emitting layer  163 G) with a uniform film thickness is formed easily. Accordingly, this makes it possible to improve flexibility in pixel design. The light-emitting layer  163  with a uniform film thickness makes it possible to improve light emission characteristics. Moreover, the light-emitting layer  163  formed by the evaporation method is expected to achieve an improvement in device characteristics and device lifetime, compared to the light-emitting layer  163  formed with use of the coating method. 
     Since the foregoing creeping-up region  163 GR is formed also by a height difference caused by respective components (for example but not limited to, the TFT layer and the partition wall) on the substrate  11 , forming films of the materials of all of the light-emitting layers  163  with use of the evaporation method makes it possible to form the light-emitting layer  163  with a further uniform film thickness. 
     A light-emitting layer (the light-emitting layer  263 ) of a hybrid organic EL display unit (for example, the display unit  2  in  FIG. 19  and the display unit  2 A in  FIG. 21 ) may be formed with use of the evaporation method. The hole transport layers  162 R,  162 G, and  162 B in the foregoing Modification Example 5 ( FIG. 27 ) may be formed with use of the evaporation method. 
     As described in the second embodiment ( FIGS. 14A to 16C ), after the liquid-repellent masks  22 R,  22 G, and  22 B are formed, the film of the material of the light-emitting layer  163  may be formed with use of the evaporation method. 
     Modification Example 9 
       FIG. 38  illustrates a configuration of a display unit (a display unit  4 ) manufactured by a method according to Modification Example 9. The display unit  4  includes hole injection layers  161 R,  161 G, and  161 B and the hole transport layers  162 R,  162 G, and  162 B separated for each red organic EL device  10 R, each green organic EL device  10 G, and each blue organic EL device  10 B, respectively. The display unit  2  has a similar configuration to that of the display unit  1  according to the foregoing first embodiment except for this point. 
     The hole injection layer  161 R and the hole transport layer  162 R are provided in the red organic EL device  10 R, the hole injection layer  161 G and the hole transport layer  162 G are provided in the green organic EL device  10 G, and the hole injection layer  161 B and the hole transport layer  162 B are provided in the blue organic EL device  10 B. The thicknesses of the hole injection layers  161 R,  161 G, and  161 B may be the same as or different from one another. The thicknesses of the hole transport layers  162 R,  162 G, and  162 B may be the same as or different from one another. The thicknesses of the hole injection layers  161 R,  161 G, and  161 B and the hole transport layers  162 R,  162 G, and  162 B are adjustable according to respective devices (the red organic EL device  10 R, the green organic EL device  10 G, and the blue organic EL device  10 B) by patterning the hole injection layers  161 R,  161 G, and  161 B and the hole transport layers  162 R,  162 G, and  162 B for the respective devices. For example, in a case where the display unit  4  is a top emission display unit, cavities of the red organic EL device  10 R, the green organic EL device  10 G, and the blue organic EL device  10 B are adjustable by the thicknesses of the hole injection layer  161 R,  161 G, and  161 B and the hole transport layers  162 R,  162 G, and  162 B in addition to the thicknesses of the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B. This makes it possible to improve display characteristics of the display unit  4 . 
     For example, the hole injection layers  161 R,  161 G, and  161 B and the hole transport layers  162 R,  162 G, and  162 B may be formed as follows ( FIGS. 39A to 41C ). In  FIGS. 39A to 41C , the partition wall  15  (illustrated in  FIG. 38 ) is not illustrated. 
     First, after layers to the lower electrode  14  are formed in a similar manner to that in the display unit  1 , a hole injection material layer  161 RA, a hole transport material layer  162 RA, and the red material layer  163 RA are formed in this order on the entire surface of the substrate  11  ( FIG. 39A ). The hole injection material layer  161 RA, the hole transport material layer  162 RA, and the red material layer  163 RA may be formed with use of a coating method (the first embodiment) or may be formed with use of an evaporation method (the third embodiment). Subsequently, as illustrated in  FIG. 39B , the mask  21 R is selectively formed in a region where the red organic EL device  10 R is to be formed on the red material layer  163 RA. Subsequently, portions exposed from the mask  21 R of the hole injection material layer  161 RA, the hole transport material layer  162 RA, and the red material layer  163 RA are removed by, for example, wet etching or dry etching ( FIG. 39C ). Thus, the hole injection layer  161 R, the hole transport layer  162 R, and the red light-emitting layer  163 R are formed. 
     Subsequently, a hole injection material layer  161 GA, the hole transport material layer  162 GA, and the green material layer  163 GA are formed in this order on the substrate  11  where the hole injection layer  161 R, the hole transport layer  162 R, and the red light-emitting layer  163 R are provided ( FIG. 40A ). The mask  21 R may be covered with the hole injection material layer  161 GA, the hole transport material layer  162 GA, and the green material layer  163 GA. Subsequently, as illustrated in  FIG. 40B , after the mask  21 G is formed in a region where the green organic EL device  10 G is to be formed on the green material layer  163 GA, portions exposed from the mask  21 G of the hole injection material layer  161 GA, the hole transport material layer  162 GA, and the green material layer  163 GA are removed ( FIG. 40C ). Thus, the hole injection layer  161 G, the hole transport layer  162 G, and the green light-emitting layer  163 G are formed. 
     Subsequently, a hole injection material layer  161 BA, a hole transport material layer  162 BA, and the blue material layer  163 BA are formed in this order on the substrate  11  where the hole injection layer  161 G, the hole transport layer  162 G, and the green light-emitting layer  163 G are provided ( FIG. 41A ). The masks  21 R and  21 G may be covered with the hole injection material layer  161 BA, the hole transport material layer  162 BA, and the blue material layer  163 BA. Subsequently, as illustrated in  FIG. 41B , after the mask  21 B is formed in a region where the blue organic EL device  10 B is to be formed on the blue material layer  163 BA, portions exposed from the mask  21 B of the hole injection material layer  161 BA, the hole transport material layer  162 BA, and the blue material layer  163 BA are removed ( FIG. 41C ). Thus, the hole injection layer  161 B, the hole transport layer  162 B, and the blue light-emitting layer  163 B are formed. The red organic EL device  10 R, the green organic EL device  10 G, and the blue organic EL device  10 B may be formed in any order. 
     After the hole injection layers  161 R,  161 G, and  161 B are provided, a common hole transport layer shared by the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B may be formed. 
     The hole injection layers  161 R,  161 G, and  161 B, the hole transport layer  162 R,  162 G, and  162 B, the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B may be formed with use of a water-repellent mask (the masks  22 R,  22 G, and  22 B). 
     Modification Example 10 
       FIG. 42  illustrates a configuration of a display unit (a display unit  5 ) manufactured by a method according to Modification Example 10. The display unit  5  includes electron transport layers  164 R,  164 G, and  164 B and electron injection layers  165 R,  165 G, and  165 B separated for each red organic EL device  10 R, each green organic EL device  10 G, and each blue organic EL device  10 B, respectively. The display unit  5  has a similar configuration to that of the display unit  1  according to the foregoing first embodiment except for this point. 
     The electron transport layer  164 R and the electron injection layer  165 R are provided in the red organic EL device  10 R, the electron transport layer  164 G and the electron injection layer  165 G are provided in the green organic EL device  10 G, and the electron transport layer  164 B and the electron injection layer  165 B are provided in the blue organic EL device  10 B. Thicknesses of the electron transport layers  164 R,  164 G, and  164 B may be the same as or different from one another. Thicknesses of the electron injection layers  165 R,  165 G, and  165 B may be the same as or different from one another. Thus, the thicknesses of the electron transport layers  164 R,  164 G, and  164 B and the electron injection layers  165 R,  165 G, and  165 B are adjustable according to respective devices (the red organic EL device  10 R, the green organic EL device  10 G, and the blue organic EL device  10 B) by patterning the electron transport layers  164 R,  164 G, and  164 B and the electron injection layers  165 R,  165 G, and  165 B for the respective devices. For example, in a case where the display unit  5  is a top emission display unit, cavities of the red organic EL device  10 R, the green organic EL device  10 G, and the blue organic EL device  10 B are adjustable by the thicknesses of the electron transport layers  164 R,  164 G, and  164 B and the electron injection layers  165 R,  165 G, and  165 B in addition to the thicknesses of the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B. This makes it possible to improve display characteristics of the display unit  5 . 
     For example, the electron transport layers  164 R,  164 G, and  164 B and the electron injection layers  165 R,  165 G, and  165 B may be formed as follows ( FIGS. 43A to 45C ). In  FIGS. 43A to 44C , the partition wall  15  (illustrated in  FIG. 42 ) is not illustrated. 
     First, after layers to the hole transport layer  162  are formed in a similar manner to that in the display unit  1 , the red material layer  163 RA, the electron transport material layer  164 RA, and the electron injection material layer  165 RA are formed in this order on the entire surface of the hole transport layer  162  ( FIG. 43A ). The red material layer  163 RA, the electron transport material layer  164 RA, and the electron injection material layer  165 RA may be formed with use of a coating method (the first embodiment), or may be formed with use of an evaporation method (the third embodiment). Subsequently, as illustrated in  FIG. 43B , a mask  26 R is selectively formed in a region where the red organic EL device  10 R is to be formed on the electron injection material layer  165 RA. The mask  26 R is formed of a similar material to that described in the foregoing masks  21 R,  21 G, and  21 B by, for example, a reverse offset printing method to be in contact with the electron injection material layer  165 RA. The mask  26 R (and masks  26 G and  26 B that will be describe later) may be formed by not only the reverse offset printing method but also, for example but not limited to, flexographic printing, gravure printing, gravure offset printing, offset printing, or screen printing. The mask  26 R may be formed with use of, for example but not limited to, an ink-jet method, a nozzle printing method, or a laser transfer method. Subsequently, portions exposed from the mask  26 R of the red material layer  163 RA, the electron transport material layer  164 RA, and the electron injection material layer  165 RA are removed by, for example, wet etching or dry etching ( FIG. 43C ). Thus, the red light-emitting layer  163 R, the electron transport layer  164 R, and the electron injection layer  165 R are formed. 
     Subsequently, the green material layer  163 GA, the electron transport material layer  164 GA, and the electron injection material layer  162 GA are formed in this order on the hole transport layer  162  where the red light-emitting layer  163 R, the electron transport layer  164 R, and the electron injection layer  165 R are provided ( FIG. 44A ). Subsequently, as illustrated in  FIG. 44B , the mask  26 G is formed in a region where the green organic EL device  10 G is to be formed on the electron injection material layer  162 GA. Subsequently, portions exposed from the mask  26 G of the green material layer  163 GA, the electron transport material layer  164 GA, and the electron injection material layer  162 GA are removed ( FIG. 44C ). Thus, the green light-emitting layer  163 G, the electron transport layer  164 G, and the electron injection layer  165 G are formed. 
     Subsequently, the blue material layer  163 BA, the electron transport material layer  164 BA, and the electron injection material  165 BA are formed in this order on the hole transport layer  162  where the green light-emitting layer  163 G, the electron transport layer  164 G, and the electron injection layer  165 G are provided ( FIG. 45A ). Subsequently, as illustrated in  FIG. 45B , the mask  26 B is formed in a region where the blue organic EL device  10 B is to be formed on the electron injection material layer  165 BA. Subsequently, portions exposed from the mask  26 B of the blue material layer  163 BA, the electron transport material layer  164 BA, and the electron injection material layer  165 BA are removed ( FIG. 45C ). Thus, the blue light-emitting layer  163 B, the electron transport layer  164 B, and the electron injection layer  165 B are formed. The red organic EL device  10 R, the green organic EL device  10 G, and the blue organic EL device  10 B may be formed in any order. 
     In this modification example, after other organic material layers (the electron transport material layers  164 RA,  164 GA, and  164 BA and the electron injection material layers  165 RA,  165 GA, and  165 BA) are provided on the red material layer  163 RA, the green material layer  163 GA, and the blue material layer  163 BA, the masks  26 R,  26 G, and  26 B are formed. This makes it possible to prevent the materials of the masks  26 R,  26 G, and  26 B from remaining on the red material layer  163 RA, the green material layer  163 GA, and the blue material layer  163 BA (the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B). Moreover, this also makes it possible to prevent the surfaces of the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B from being dissolved when the masks  26 R,  26 G, and  26 B are removed. Accordingly, this makes it possible to maintain light emission characteristics of the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B. 
     The electron injection layer shared by the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B may be formed after the electron transport layers  164 R,  164 G, and  164 B are provided. The electron transport layer may be formed of a laminate configuration including a plurality of layers, and some of the layers of the electron transport layer may be formed for each of the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B. 
     The red light-emitting layer  163 R, the green light-emitting layer  163 G, the blue light-emitting layer  163 B, the electron transport layers  164 R,  164 G, and  164 B, and the electron injection layers  165 R,  165 G, and  165 B may be formed with use of a water-repellent mask (the masks  22 R,  22 G, and  22 B). 
     Modification Example 11 
       FIG. 46  illustrates a configuration of a display unit (a display unit  6 ) manufactured by a method according to Modification Example 11. In this display unit  6 , all organic layers  16  are separated for each of the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B. The display unit  6  has a similar configuration to that of the display unit  1  according to the foregoing first embodiment except for this point. 
     In the red organic EL device  10 R, the hole injection layer  161 R, the hole transport layer  162 R, the red light-emitting layer  163 R, the electron transport layer  164 R, and the electron injection layer  165 R are provided as the organic layer  16 , in the green organic EL device  10 G, the hole injection layer  161 G, the hole transport layer  162 G, the green light-emitting layer  163 G, the electron transport layer  164 G, and the electron injection layer  165 G are provided as the organic layer  16 , and in the blue organic EL device  10 B, the hole injection layer  161 B, the hole transport layer  162 B, the blue light-emitting layer  163 B, the electron transport layer  164 B, and the electron injection layer  165 B are provided as the organic layer  16 . 
     For example, the organic layer  16  separated for respective devices may be formed as follows ( FIGS. 47A to 49C ). In  FIGS. 47A to 49C , the partition wall  15  (illustrated in  FIG. 46 ) is not illustrated. 
     First, after layers to the lower electrode  14  are formed in a similar manner to that in the display unit  1 , the hole injection material layer  161 RA, the hole transport material layer  162 RA, the red material layer  163 RA, the electron transport material layer  164 RA, and the electron injection material layer  164 RA are formed in this order on the entire surface of the substrate  11  ( FIG. 47A ). The hole injection material layer  161 RA, the hole transport material layer  162 RA, the red material layer  163 RA, the electron transport material layer  164 RA, and the electron injection material layer  165 RA may be formed with use of a coating method (the first embodiment), or may be formed with use of an evaporation method (the third embodiment). Subsequently, as illustrated in  FIG. 47B , after the mask  26 R is selectively formed in a region where the red organic EL device  10 R is to be formed on the electron injection material layer  165 RA, portions exposed from the mask  26 R of the hole injection material layer  161 RA, the hole transport material layer  162 RA, the red material layer  163 RA, the electron transport material layer  164 RA, and the electron injection material layer  165 RA are removed by, for example, wet etching or dry etching ( FIG. 47C ). Thus, the hole injection layer  161 R, the hole transport layer  162 R, the red light-emitting layer  163 R, the electron transport layer  164 R, and the electron injection layer  165 R are formed. 
     Subsequently, the hole injection material layer  161 GA, the hole transport material layer  162 GA, the green material layer  163 GA, the electron transport material layer  164 GA, and the electron injection material layer  162 GA are formed in this order on the substrate  11  where the hole injection layer  161 R, the hole transport layer  162 R, the red light-emitting layer  163 R, the electron transport layer  164 R, and the electron injection layer  165 R are provided ( FIG. 48A ). The mask  26 R may be covered with the hole injection material layer  161 GA, the hole transport material layer  162 GA, the green material layer  163 GA, the electron transport material layer  164 GA, and the electron injection material layer  162 GA. Subsequently, as illustrated in  FIG. 48B , the mask  26 G is formed in a region where the green organic EL device  10 G is to be formed on the electron injection material layer  162 GA. Subsequently, portions exposed from the mask  26 G of the hole injection material layer  161 GA, the hole transport material layer  162 GA, the green material layer  163 GA, the electron transport material layer  164 GA, and the electron injection material layer  162 GA are removed ( FIG. 48C ). Thus, the hole injection layer  161 G, the hole transport layer  162 G, the green light-emitting layer  163 G, the electron transport layer  164 G, and the electron injection layer  165 G are formed. 
     Subsequently, the hole injection material layer  161 BA, the hole transport material layer  162 BA, the blue material layer  163 BA, the electron transport material layer  164 BA, and the electron injection material layer  165 BA are formed in this order on the hole transport layer  162  where the hole injection layer  161 G, the hole transport layer  162 G, the green light-emitting layer  163 G, the electron transport layer  164 G, and the electron injection layer  165 G are provided ( FIG. 49A ). The masks  26 R and  26 G may be covered with the hole injection material layer  161 BA, the hole transport material layer  162 BA, the blue material layer  163 BA, the electron transport material layer  164 BA, and the electron injection material layer  165 BA. Subsequently, as illustrated in  FIG. 49B , after the mask  26 B is formed in a region where the blue organic EL device  10 B is to be formed on the electron injection material layer  165 BA, portions exposed from the mask  26 B of the hole injection material layer  161 BA, the hole transport material layer  162 BA, the blue material layer  163 BA, the electron transport material layer  164 BA, and the electron injection material layer  165 BA are removed ( FIG. 49C ). Thus, the hole injection layer  161 B, the hole transport layer  162 B, the blue light-emitting layer  163 B, the electron transport layer  164 B, and the electron injection layer  165 B are formed. The red organic EL device  10 R, the green organic EL device  10 G, and the blue organic EL device  10 B may be formed in any order. 
     The hole injection layers  161 R,  161 G, and  161 B, the hole transport layer  162 R,  162 G, and  162 B, the red light-emitting layer  163 R, the green light-emitting layer  163 G, the blue light-emitting layer  163 B, the electron transport layers  164 R,  164 G, and  164 B, and the electron injection layers  165 R,  165 G, and  165 B may be formed with use of a water-repellent mask (the masks  22 R,  22 G, and  22 B). 
     Modification Example 12 
     A part of the organic layer  16  provided separately for each device may overlap a part of the organic layer  16  in a device adjacent thereto (Modification Example 12). 
       FIG. 50  illustrates a state in which a part of the red light-emitting layer  163 R is formed to overlap a part of the green light-emitting layer  163 G. In  FIG. 50 , the substrate  11 , the TFT layer  12 , the planarization layer  13 , the lower electrode  14 , and the partition wall  15  (all of which are illustrated in  FIG. 1 ) are omitted. Thus, providing parts of the light-emitting layers  163  in adjacent devices to overlap each other makes it possible to improve resolution. Description about this will be given below. 
     As illustrated in  FIG. 51 , the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B are formed to allow their widths to extend by a distance MA from an end of an aperture of the partition wall  15 . One reason for this is that an error upon manufacturing is caused by, for example but not limited to, displacement between the position of the aperture of the partition wall  15  and the position where the light-emitting layer  163  is formed, and a difference between the size of the aperture of the partition wall  15  and the size of the light-emitting layer  163 . The distance MA is determined with consideration of straightness of an end (a planar view) of the light-emitting layer  163 , and variation in a side etching amount of the light-emitting layer  63  in addition to this. Moreover, during etching of the light-emitting layer  163 , a portion with a nonuniform film thickness is formed at the end of the light-emitting layer  163 , and the distance MA is determined with consideration of this portion as well. 
     A distance MB is a distance between an end of the red light-emitting layer  163 R, the green light-emitting layer  163 G, or the blue light-emitting layer  163 B and a light emission region (the aperture of the partition wall  15 ) of a device adjacent thereto. Providing the distance MB makes it possible to reduce an influence of the red light-emitting layer  163 R, the green light-emitting layer  163 G, or the blue light-emitting layer  163 B on light emission of the device adjacent thereto. In order to improve a pixel pitch, i.e., resolution, it is necessary to minimize the distance MA and the distance MB. Since the distance MA and the distance MB are reduced by allowing the parts of the light-emitting layers  163  of adjacent devices to overlap each other within a range where the light emission regions of the adjacent devices are not affected, an improvement in resolution is achievable. 
       FIGS. 52A to 52C  illustrate states in which the masks  21 R,  21 G, and  21 G illustrated in  FIG. 50  are removed. As illustrated in  FIG. 52A , the mask  21 R may remain in a portion where the red light-emitting layer  163 R and the green light-emitting layer  163 G overlap each other. As illustrated in  FIG. 52B , the red light-emitting layer  163 R and the green light-emitting layer  163 G may overlap each other, and the mask  21  may be completely removed. As illustrated in  FIG. 52C , a portion overlapping the red light-emitting layer  163 R of the green light-emitting layer  163 G may be removed. 
     States of the red light-emitting layer  163 R, the green light-emitting layer  163 G, and the blue light-emitting layer  163 B after the masks  21 R,  21 G, and  21 B are removed depend on, for example but not limited to, the material of the light-emitting layer  163 , the materials of the masks  21 R,  21 G, and  21 B, the kinds of the solvents of the masks  21 R,  21 G, and  21 B, and dissolving conditions for the masks  21 R,  21 G, and  21 B. For example, in a case where a material with a large intermolecular bonding force is used for the light-emitting layer  163 , the light-emitting layer  163  is prone to be turned to the state illustrated in  FIG. 52A or 52B . In a case where a material with a small intermolecular bonding force is used for the light-emitting layer  163 , a portion overlapping the red light-emitting layer  163 R of the green light-emitting layer  163  is easily removed. In other words, the light-emitting layer  163  is easily turned into the state illustrated in  FIG. 52C . In a case where a solvent with high solubility and high permeability is used as the solvent of the masks  21 R,  21 G, and  21 B, the light-emitting layer  163  is prone to be turned to a state in which the mask  21 R is completely removed (the state illustrated in  FIG. 52B  or  FIG. 52C ). 
     In  FIGS. 50 to 52C , the state in which the light-emitting layers  163  of adjacent devices are formed to overlap each other in part is described; however, the organic layers  16 , other than the light-emitting layer  163 , provided separately for each device (for example but not limited to, the hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer) may overlap the organic layers  16  other than the light-emitting layer  163  of a device adjacent thereto. 
     MODULE AND APPLICATION EXAMPLES 
     Application Examples of the display units  1 ,  2 ,  2 A, and  3  described in the foregoing embodiments and the foregoing modification examples will be described below. The display units according to the foregoing embodiments and other examples are applicable to display units of electronic apparatuses, in any fields, that display an image signal inputted from outside or an image signal produced inside as an image or a picture, such as televisions, digital still cameras, notebook personal computers, mobile terminal units such as mobile phones, and video cameras. 
     (Module) 
     The display units according to the foregoing embodiments and other examples may be incorporated as, for example, a module illustrated in  FIG. 53  into various electronic apparatuses such as Application Examples 1 to 5 that will be described later. This module may be configured, for example, by providing a region  210  exposed from the protective film and a sealing substrate  18  on one side of the substrate  11  and extending wiring lines of the signal line drive circuit  120  and the scanning line drive circuit  130  to form an external connection terminal (not illustrated) in the exposed region  210 . A flexible printed circuit (FPC)  220  for signal input and output may be provided to the external connection terminal. 
     Application Example 1 
       FIG. 54  illustrates an appearance of a television to which one of the display units according to the foregoing embodiments and other examples is applied. This television may include, for example, an image display screen section  300  including a front panel  310  and a filter glass  320 , and the image display screen section  300  is configured of one of the display units  1 ,  2 ,  2 A, and  3  according to the foregoing embodiments and other examples. 
     Application Example 2 
       FIGS. 55A and 55B  illustrate appearances of a digital still camera to which one of the display units according to the foregoing embodiments and other examples is applied. This digital still camera may include, for example, a light-emitting section  410  for a flash, a display section  420 , a menu switch  430 , and a shutter button  440 , and the display section  420  is configured of one of the display units  1 ,  2 ,  2 A, and  3  according to the foregoing embodiments and other examples. 
     Application Example 3 
       FIG. 56  illustrates an appearance of a notebook personal computer to which one of the display units according to the foregoing embodiments and other examples is applied. This notebook personal computer may include, for example, a main body  510 , a keyboard  520  for operation of inputting, for example but not limited to, characters, and a display section  530  that displays an image, and the display section  530  is configured of one of the display units  1 ,  2 ,  2 A, and  3  according to the foregoing embodiments and other examples. 
     Application Example 4 
       FIG. 57  illustrates an appearance of a video camera to which one of the display units according to the foregoing embodiments and other examples is applied. This video camera may include, for example, a main body section  610 , a lens  620  provided on a front side surface of the main body section  610  and for shooting an image of a subject, a shooting start and stop switch  630 , and a display section  640 , and the display section  640  is configured of one of the display units  1 ,  2 ,  2 A, and  3  according to the foregoing embodiments and other examples. 
     Application Example 5 
       FIGS. 58A and 58B  illustrate appearances of a mobile phone to which one of the display units according to the foregoing embodiments and other examples is applied. This mobile phone may have a configuration in which, for example, a top-side enclosure  710  and a bottom-side enclosure  720  are connected together through a connection section (hinge section)  730 , and the mobile phone may include a display  740 , a sub-display  750 , a picture light  760 , and a camera  770 . The display  740  or the sub-display  750  is configured of one of the display units  1 ,  2 ,  2 A, and  3  according to the foregoing embodiments and other examples. 
     (Illumination Unit) 
     An illumination unit may be configured of the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B described in the foregoing embodiments and the foregoing modification examples.  FIGS. 43 and 44  illustrate appearances of a desk illumination unit configured by providing a plurality of red organic EL devices  10 R, a plurality of green organic EL devices  10 G, and a plurality of organic EL devices  10 B. The illumination unit may include, for example, an illumination section  43  attached to a rod  42  provided on a base  41 , and the illumination section  43  is configured of the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B in one of the foregoing embodiments and other examples. When the illumination section  43  uses a flexible substrate such as a resin substrate as the substrate  11 , the illumination section  43  may have any shape such as a tubular shape illustrated in  FIG. 59  or a curved shape illustrated in  FIG. 60 . 
       FIG. 61  illustrates an appearance of a room illumination unit to which the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B in one of the foregoing embodiments and other examples are applied. The illumination unit may include, for example, an illumination section  44  configured of the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B in one of the foregoing embodiments and other examples. The desired number of the illumination sections  44  are provided at desired intervals on a ceiling  50 A of a building. It is to be noted that the illumination sections  44  may be disposed on any place such as a wall  50 B or a floor (not illustrated) in addition to the ceiling  50 A, depending on the intended use. 
     Although the technology is described referring to the embodiments and the modification examples, the technology is not limited thereto, and may be variously modified. For example, in the foregoing Modification Example 10, a case where the red light-emitting layers  163 R,  163 G, and  163 B, and the electron transport layers  164 R,  164 G, and  164 B, and the electron injection layers  165 R,  165 G, and  165 B are patterned is described; however, the electron injection layers  165 R,  165 G, and  165 B may be formed after providing a common electron transport layer shared by the red organic EL devices  10 R, the green organic EL devices  10 G, and the blue organic EL devices  10 B. The display units  4  and  5  according to Modification Examples 9 and 10 ( FIGS. 38 and 42 ) may be hybrid organic EL display units (for example, the display unit  2  in  FIG. 19  and the display unit  2 A in  FIG. 21 ). 
     Moreover, in the foregoing embodiments and other examples, a case where the organic layer  16  includes the hole injection layer  161 , the hole transport layer  162 , the light-emitting layer  163 , the electron transport layer  164 , and the electron injection layer  165  is described; however, layers other than the light-emitting layer  163  may be omitted if necessary. 
     Further, for example, in the foregoing embodiments and other examples, the active matrix display unit is described; however, a passive matrix display unit may be adopted. 
     Furthermore, for example, in the foregoing embodiments and other examples, a case where the first electrode  14  and the second electrode  17  serve as an anode and a cathode, respectively, is described; however, the first electrode  14  and the second electrode  17  may serve as a cathode and an anode, respectively. 
     In addition thereto, the material and thickness of each layer, the method and conditions of forming each layer are not limited to those described in the foregoing embodiments, and each layer may be made of any other material with any other thickness by any other method under any other conditions. 
     It is to be noted that the effects described in this description are merely examples; therefore, effects in the technology are not limited thereto, and the technology may have other effects. 
     It is to be noted that the technology may have following configurations. 
     (1) A method of manufacturing an organic light-emitting device including: 
     forming a first organic material layer on a substrate; and 
     forming a mask in a first region on the first organic material layer, and then selectively removing the first organic material layer to form a first organic layer in the first region. 
     (2) The method of manufacturing the organic light-emitting device according to (1), in which the mask is formed of one of a fluorine resin, a water-soluble resin, and an alcohol-soluble resin. 
     (3) The method of manufacturing the organic light-emitting device according to (1) or (2), in which after the first organic layer is formed, the mask is removed with use of a solvent not allowing the first organic layer to be dissolved therein. 
     (4) The method of manufacturing the organic light-emitting device according to any one of (1) to (3), in which the mask is formed by a reverse offset printing method. 
     (5) The method of manufacturing the organic light-emitting device according to any one of (1) to (4), further including forming one or a plurality of second organic layers after the first organic layer is formed. 
     (6) The method of manufacturing the organic light-emitting device according to (5), in which 
     a second organic material layer is formed on the substrate where the mask and the first organic layer are provided, and 
     after one other mask is formed in a second region on the second organic material layer, the second organic material layer is selectively removed to form the second organic layer in the second region. 
     (7) The method of manufacturing the organic light-emitting device according to (5) or (6), in which the first organic layer and the second organic layer each include a light-emitting layer. 
     (8) The method of manufacturing the organic light-emitting device according to (6), in which after the first organic layer and the second organic layer are formed, the mask and the other mask are removed. 
     (9) The method of manufacturing the organic light-emitting device according to (6), in which the second organic material layer is formed with use of an evaporation method. 
     (10) A method of manufacturing an organic light-emitting device including: 
     forming a liquid-repellent mask having an aperture in a first region on a substrate; and 
     thereafter forming a first organic layer in the first region. 
     (11) The method of manufacturing the organic light-emitting device according to (10), further including forming one or a plurality of second organic layers after the first organic layer is formed. 
     (12) The method of manufacturing the organic light-emitting device according to (11), in which after one other liquid-repellent mask having an aperture in a second region on the substrate is formed, the second organic layer is formed in the second region. 
     (13) The method of manufacturing the organic light-emitting device according to (12), in which the other mask is formed to cover a top surface and a side surface of the first organic layer. 
     (14) The method of manufacturing the organic light-emitting device according to (11), in which after the first organic layer is formed, the second organic layer is formed in the second region by a printing method. 
     (15) The method of manufacturing the organic light-emitting device according to (11), in which 
     a step formation layer is formed on the substrate by allowing the second region to have a larger thickness than that of the first region, and 
     the second organic layer is formed in the second region. 
     (16) The method of manufacturing the organic light-emitting device according to any one of (11) to (15), in which the first organic layer and the second organic layer each include a light-emitting layer. 
     (17) The method of manufacturing the organic light-emitting device according to claim (16), in which 
     a plurality of the second organic layers are formed, and 
     one or more of the second organic layers are formed in the second region, and one or more of the other second organic layers are formed to extend from the second region to the first region. 
     (18) The method of manufacturing the organic light-emitting device according to (17), in which 
     after the first organic layer is formed, a connection layer is formed, and 
     one or more of the other second organic layers are formed on an entire surface of the connection layer. 
     (19) A method of manufacturing a display unit including: 
     forming an organic light-emitting device, the forming of the organic light-emitting device including 
     forming a first organic material layer on a substrate, and 
     forming a mask in a first region on the first organic material layer, and then selectively removing the first organic material layer to form a first organic layer in the first region. 
     (20) A method of manufacturing a display unit including: 
     forming an organic light-emitting device, the forming of the organic light-emitting device including 
     forming a liquid-repellent mask having an aperture in a first region on a substrate, and 
     thereafter forming a first organic layer in the first region. 
     This application claims the benefit of Japanese Priority Patent Application JP 2013-194362 filed on Sep. 19, 2013, the entire contents of which are incorporated herein by reference. 
     It should be understood that various changes and modifications to the presently preferred embodiments described herein will be apparent to those skilled in the art. Such changes and modifications can be made without departing from the spirit and scope of the present subject matter and without diminishing its intended advantages. It is therefore intended that such changes and modifications be covered by the appended claims.