Patent Publication Number: US-2023157055-A1

Title: Electronic structure and method of manufacturing complex film

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present disclosure relates to an electronic structure and a method of manufacturing a complex film. 
     2. Description of the Related Art 
     In general, an electronic circuit is manufactured by mounting electronic elements (referred to also as “devices”) having various functions on a wiring substrate. In recent years, there has been developed a method of simplifying the mounting process by forming multiple types of electronic elements different from each other as one film and sticking the film on the wiring substrate. 
     As an example, in a display panel of the micro-LED (Light-Emitting Diode) type to be installed in a display device, one pixel is formed with light-emitting elements (LEDs) of three colors: red, green and blue, for example, and a great number of light-emitting elements are arranged in a grid on a circuit board. This display panel of the micro-LED type can be manufactured by, for example, forming the light-emitting elements of red, green and blue corresponding to one pixel as one complex film like a thin film and sticking the complex films on a wiring substrate in a grid. 
     As a method for manufacturing such a complex film, there has been proposed a method in which a sacrificial layer is formed on a substrate, a complex film including electronic elements is formed on the sacrificial layer, and thereafter part of the sacrificial layer is removed. See  FIGS.  1  to  9   , etc. in Japanese Patent Application Publication No. 2017-108160 as Patent Reference 1, for example. 
     However, in such a method, projecting anchors are formed on a lower surface of the complex film in order to retain the complex film on the substrate at the time of etching. Therefore, this method has a problem in that it becomes necessary to execute a process of flattening a mounting surface of the complex film after peeling the complex film off of the substrate and that deteriorates the productivity. 
     SUMMARY OF THE INVENTION 
     An object of the present disclosure is to provide an electronic structure and a method of manufacturing a complex film that make it possible to increase the productivity of complex films. 
     An electronic structure of the present disclosure includes a substrate having a first surface; a functional unit including a functional section that has an electronic function and a protective member that protects the functional section and having a second surface formed on the first surface’s side; and a support layer provided at a position to contact the first surface and having a third surface in contact with the second surface of the functional unit, area of the third surface being smaller than area of the second surface, wherein one of part of the functional unit forming the second surface of the protective member and part of the support layer forming the third surface contains organic material as its principal component and the other contains inorganic material as its principal component. 
     A method of manufacturing a complex film of the present disclosure includes forming a substrate having a first surface; forming a support layer having a third surface on the first surface; forming a complex film, including a functional section that has an electronic function and a protective member that protects the functional section and having a second surface formed on the third surface’s side, on the support layer; and removing part of the support layer and thereby making area of the third surface, in contact with the complex film in remaining part of the support layer, smaller than area of the second surface, wherein one of part of the complex film forming the second surface of the protective member and part of the support layer forming the third surface contains organic material as its principal component and the other contains inorganic material as its principal component. 
     According to the present disclosure, an electronic structure and a method of manufacturing a complex film capable of increasing the productivity of complex films can be realized. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present disclosure will become more fully understood from the detailed description given hereinbelow and the accompanying drawings which are given by way of illustration only, and wherein: 
         FIGS.  1 A and  1 B  are a schematic plan view and a schematic cross-sectional view showing the configuration of an electronic structure according to a first embodiment; 
         FIG.  2    is a flowchart showing a manufacture peeling mounting procedure according to the first embodiment; 
         FIGS.  3 A to  3 G  are schematic cross-sectional views showing manufacture of the electronic structure according to the first embodiment; 
         FIGS.  4 A to  4 E  are schematic cross-sectional views showing the manufacture of the electronic structure and peeling and mounting of a complex film according to the first embodiment; 
         FIGS.  5 A and  5 B  are a schematic plan view and a schematic cross-sectional view showing the configuration of an electronic structure according to a second embodiment; 
         FIG.  6    is a flowchart showing a manufacture peeling mounting procedure according to the second embodiment; 
         FIGS.  7 A to  7 G  are schematic cross-sectional views showing manufacture of the electronic structure according to the second embodiment; 
         FIGS.  8 A to  8 E  are schematic cross-sectional views showing the manufacture of the electronic structure and the peeling and the mounting of a complex film according to the second embodiment; 
         FIGS.  9 A and  9 B  are a schematic plan view and a schematic cross-sectional view showing the configuration of an electronic structure according to a third embodiment; 
         FIGS.  10 A and  10 B  are schematic cross-sectional views showing the mounting of complex films according to the third embodiment; and 
         FIG.  11    is a schematic cross-sectional view showing the configuration of an electronic structure according to another embodiment. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Further scope of applicability of the present disclosure will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating embodiments of the present disclosure, are given by way of illustration only, and various changes and modifications will become apparent to those skilled in the art from the detailed description. 
     1. First Embodiment 
     1-1. Configuration of Electronic Structure and Complex Film 
       FIG.  1 A  is a schematic plan view showing the configuration of an electronic structure  1  and a complex film  2  according to a first embodiment.  FIG.  1 B  is a schematic cross-sectional view showing a cross section at the line I-I in  FIG.  1 A . The electronic structure  1  has a configuration in which a support layer  11  is provided on a formation substrate  10  and the complex film  2  is stuck on an upper side of the support layer  11 . 
     For convenience of description, in the first embodiment, a direction heading from the left to the right in  FIG.  1 A  is represented as an X direction, a direction heading from the top to the bottom in  FIG.  1 A  is represented as a Y direction, and a direction heading from the back to the front of the sheet of  FIG.  1 A  is represented as a Z direction. Further, for convenience, a Z direction side (i.e., a surface facing the Z direction) and an opposite side (i.e., a surface facing the -Z direction) of each part are respectively referred to also as a “front side” and a “back side”. 
     On the complex film  2 , the length of a side extending in the X direction or the Y direction is approximately 30 [µm] to 50 [µm] and the length of a side extending in the Z direction is approximately  1  [µm] to 15 [µm], for example. The complex film  2  has a configuration in which light-emitting elements of three colors: red (R), green (G) and blue (B), are arranged to be successively aligned in the X direction, wiring members and connection terminals are connected to each of the light-emitting elements, and the components are integrated into one film-like package. Specifically, the complex film  2  includes a base film  12 , light-emitting elements  13  ( 13 R,  13 G and  13 B), connection pads  14 , insulation films  15 , wiring parts  16  and a cover layer  17  as main components. 
     For convenience of description, the complex film  2  is hereinafter referred to also as a “functional unit” or “functional film” or “composite film”, the light-emitting element  13  is hereinafter referred to also as a “functional element”, and the connection pad  14  is hereinafter referred to also as a “conductive member”. Further, since the light-emitting elements  13 , the wiring parts  16  and the connection pads  14  have an electronic function of “emitting light in response to the supply of electric current”, these components are hereinafter referred to collectively as a “functional section”. Furthermore, in the complex film  2 , parts regarding the light-emitting elements  13  of the respective colors are configured in the same way as each other. Therefore, the following description will be given mainly of the part regarding the light-emitting element  13 R of red color and the description is partially omitted for the light-emitting element  13 G of green color and the light-emitting element  13 B of blue color. 
     As shown in  FIG.  1 B , the complex film  2  is overlaid on the Z direction side (i.e., front side) of the formation substrate  10  and the support layer  11 , and the entirety of the complex film  2 , the formation substrate  10  and the support layer  11  forms the electronic structure  1 . The formation substrate  10  is a plate-like member made of inorganic material and has sufficient strength. Specifically, as the formation substrate  10 , plate-like members made of various inorganic materials are usable, such as a silicon substrate made of silicon (Si), a glass substrate, a sapphire substrate or the like, for example. A formation substrate front surface  10 A as a front surface of the formation substrate  10  is formed extremely flat and its surface roughness (roughness) is less than or equal to 10 [nm]. The formation substrate front surface  10 A is hereinafter referred to also as a “first surface”. 
     The support layer  11  is made of inorganic material such as silicon oxide (SiO 2 ) or silicon nitride (SiN), for example, in a shape like a thin film. On the support layer  11 , a support layer front surface  11 A as a front surface of the support layer  11  is formed extremely flat similarly to the front surface of the formation substrate  10  and its surface roughness is less than or equal to 10 [nm]. 
     On the complex film  2 , a complex film back surface  2 B as a back surface of the complex film  2  is placed in contact with the support layer front surface  11 A in a relatively wide area. Accordingly, the complex film back surface  2 B, which is formed in the state of being in contact with the support layer front surface  11 A, is extremely smooth similarly to the support layer front surface  11 A and its surface roughness is less than or equal to 10 [nm]. In the following description, the complex film back surface  2 B is referred to also as a “second surface” and the support layer front surface  11 A is referred to also as a “third surface”. 
     Further, both of the formation substrate  10  and the support layer  11  are used in the manufacturing stage of the complex film  2 , and the complex film  2  is completed by peeling the complex film  2  off of the support layer  11 . The completed complex film  2  is mounted on a wiring substrate which will be described later (e.g., wiring substrate  90  in  FIG.  4 D  which will be explained later). 
     Namely, the electronic structure  1  is in a state in which the complex film  2  is still sticking on the support layer  11  and the formation substrate  10  and just before completion. With such a configuration of the electronic structure  1 , it is possible during conveyance/transportation, storage, etc. to handle the complex film  2  with ease as a member integrated with the formation substrate  10  while also protecting the complex film back surface  2 B. 
     The base film  12  is made of organic material such as polyimide resin, acrylic resin or epoxy resin, for example, and has an insulating property. The base film  12  is formed in a shape like a flat rectangular prism or a thin flat plate as a whole, and a side extending in the Z direction is far shorter compared to a side extending in the X direction and a side extending in the Y direction. A surface of the base film  12  on the back side is hereinafter referred to as a “base film back surface 12B”. The base film back surface  12 B is formed extremely flat and its surface roughness (roughness) is less than or equal to  10  [nm]. 
     Further, the base film  12  is formed to be larger than the support layer  11  in regard to the X direction and the Y direction, and sticks out from the support layer  11  in the X direction, the -X direction, the Y direction and the -Y direction. Put another way, the support layer  11  is formed to be one step smaller than the base film  12  in regard to the X direction and the Y direction. Specifically, on an XY plane, the outline of the support layer  11  is situated on the inner side of the outline of the base film  12  by approximately  5  [µm]. Accordingly, in the electronic structure  1 , a support gap SG is formed at each part that is on the outer side of the support layer  11  and on the inner side of the base film  12  on an XY plane and between the formation substrate  10  and the base film  12  in regard to the Z direction. 
     Furthermore, in part of the base film  12  relatively on the Y direction side (lower side in  FIG.  1 A ), square-shaped connection holes  12 H penetrating the base film  12  in the Z direction are formed respectively at three positions separate from each other in the X direction. Further, in part of the base film  12  relatively on the -Y direction side (upper side in  FIG.  1 A ), square-shaped connection holes  12 H penetrating the base film  12  in the Z direction are also formed respectively at three positions separate from each other in the X direction. 
     The light-emitting element  13 R of the red color is an electronic element made of gallium arsenide (GaAs)-based material, for example, and is a functional element that forms a light-emitting diode of the red color. The light-emitting element  13 R of the red color is provided at a position on the front surface of the base film  12  that is on the -X direction side and in the vicinity of a center in regard to the Y direction. Parenthetically, on a surface of the light-emitting element  13 R on the Z direction side, part on the -Y direction side is an anode terminal and part on the Y direction side is a cathode terminal. 
     The light-emitting element  13 G of the green color is an electronic element made of gallium nitride (GaN)-based material, for example, and is a functional element that forms a light-emitting diode of the green color. The light-emitting element  13 G is formed in the same shape as the light-emitting element  13 R and is arranged at a position on the front surface of the base film  12  that is slightly separate from the light-emitting element  13 R towards the X direction side. 
     The light-emitting element  13 B of the blue color is an electronic element made of GaN-based material, for example, and is a functional element that forms a light-emitting diode of the blue color. The light-emitting element  13 B is formed in the same shape as the light-emitting element  13 R and is arranged at a position on the front surface of the base film  12  that is slightly separate from the light-emitting element  13 G towards the X direction side. As above, the complex film  2  is provided with two or more types of functional elements different from each other. 
     Each connection pad  14  is, for example, a thin film made of metallic material, namely, a metallic film, having electrical conductivity such as gold (Au), platinum (Pt) or alloy containing at least one of Au and Pt. The connection pad  14  is provided so as to fill in the inside of the connection hole  12 H in the base film  12  while stepping over to the front surface’s side of the base film  12  in the vicinity of an outer periphery of the connection hole  12 H. Namely, one connection pad  14  is arranged on each of the Y direction side and the -Y direction side of the light-emitting element  13 R. On the connection pad  14 , a connection pad back surface  14 B as a surface on the -Z direction side is formed extremely flat similarly to the base film back surface  12 B and its surface roughness (roughness) is less than or equal to  10  [nm]. The connection pad back surface  14 B is hereinafter referred to also as a “fourth surface”. 
     On the complex film  2 , the base film back surface  12 B and the connection pad back surface  14 B form a substantially continuous plane, and this plane is the complex film back surface  2 B. On the complex film back surface  2 B, the distance between the base film back surface  12 B and the connection pad back surface  14 B in regard to the Z direction, namely, a “step height”, is extremely small. Specifically, the step height on the complex film back surface  2 B is less than or equal to 1/1000 in comparison with the shortest side in the outline of the complex film  2  on an XY plane, namely, the shorter one of the length of a side extending in the X direction and the length of a side extending in the Y direction. 
     The insulation film  15  is made of material having the insulating property such as silicon oxide (SiO 2 ), for example. The light-emitting element  13 R is provided with two insulation films  15 , specifically, one insulation film  15  on each of the Y direction side and the -Y direction side of the light-emitting element  13 R, and the insulation films  15  mainly cover side faces of the light-emitting element  13 R on the -Y direction side and the Y direction side and their vicinity. 
     The wiring part  16  is made of, for example, metallic material having electrical conductivity such as Au, aluminum (Al), copper (Cu), titanium (Ti) or Pt. The wiring part  16  is provided on each of the -Y direction side and the Y direction side of the light-emitting element  13 R and electrically connects the light-emitting element  13 R with each connection pad  14 . 
     The cover layer  17  is made of organic material such as polyimide resin similarly to the base film  12  and is provided to cover upper parts of the base film  12 , the light-emitting elements  13 , the connection pads  14 , the insulation films  15  and the wiring parts  16 . A front surface of the cover layer  17 , namely, a front surface of the complex film  2  (hereinafter referred to also as a “complex film front surface  2 A”), is formed flat on the whole. In the following description, the base film  12  and the cover layer  17  are referred to also as a “protective member”. 
     As above, in the complex film  2 , the light-emitting elements  13  for the three colors are aligned on the front surface’s side of the base film  12 , and the connection pad back surfaces  14 B of the connection pads  14  electrically connected to each light-emitting element  13  form a plane substantially the same as the base film back surface  12 B. 
     Incidentally, in the electronic structure  1 , the base film  12  and the cover layer  17  are both made of organic material. Therefore, the base film  12  and the cover layer  17  form relatively strong bonds such as covalent bonds or hydrogen bonds on the molecular level. Further, in the electronic structure  1 , the formation substrate  10  and the support layer  11  are both made of inorganic material. Therefore, the formation substrate  10  and the support layer  11  form relatively strong bonds such as covalent bonds or hydrogen bonds on the molecular level. 
     In contrast, in the electronic structure  1 , the support layer  11  is made of inorganic material whereas the base film  12  is made of organic material. Therefore, the support layer  11  and the base film  12  form relatively weak bonds like Van der Waals force on the molecular level. Further, in the electronic structure  1 , the outline of the support layer  11  is formed to be one step smaller than the outline of the base film  12  on an XY plane. Therefore, a contact area of the support layer  11  and the base film  12  is slightly smaller than a total area of the base film  12 . 
     To sum up, in the electronic structure  1 , the force acting between the support layer  11  and the base film  12  is the smallest among various types of force acting between stacked layers. Thus, in the electronic structure  1 , if sufficiently strong force in the Z direction is applied to the cover layer  17  in a state in which the formation substrate  10  is fixed, separation occurs between the support layer  11  and the base film  12 , and the complex film  2  peels from the formation substrate  10  and the support layer  11 . 
     1-2. Manufacture of Electronic Structure and Peeling and Mounting of Complex Film 
     Next, the manufacture of the electronic structure  1  and the peeling and the mounting of the complex film  2  will be described below with reference to  FIG.  2   ,  FIGS.  3 A to  3 G  and  FIGS.  4 A to  4 E .  FIG.  2    is a flowchart showing a manufacture peeling mounting procedure in regard to the manufacture of the electronic structure  1  and the peeling and the mounting of the complex film  2 .  FIGS.  3 A to  3 G  and  FIGS.  4 A to  4 E  are schematic cross-sectional views showing processes on the electronic structure  1  and the complex film  2  stepwise. Here, the Z direction side is represented also as an “upper side”, and the -Z direction side is represented also as a “lower side”. 
     The electronic structure  1  is manufactured by a prescribed manufacture peeling mounting apparatus  80  according to various processes similar to those used when manufacturing generic semiconductors, so as to overlay layers on the formation substrate  10  stepwise. Further, subsequently by the manufacture peeling mounting apparatus  80 , the complex film  2  as part of the electronic structure  1  is peeled off of the support layer  11  and then mounted on the wiring substrate  90  which will be described later according to various processes similar to those used when manufacturing or mounting generic semiconductors. 
     Specifically, the manufacture peeling mounting apparatus  80  starting the manufacture peeling mounting procedure RT 1  ( FIG.  2   ) advances to the first step SP 1 , forms the support layer  11  on the formation substrate front surface  10 A of the formation substrate  10  as shown in  FIG.  3 A , and advances to the next step SP 2 . Specifically, the manufacture peeling mounting apparatus  80  forms the thin film-like support layer  11  made of inorganic material by using CVD (Chemical Vapor Deposition) (not shown) or the like, for example. At that time, the support layer front surface  11 A is formed extremely flat similarly to the formation substrate front surface  10 A. 
     In the step SP 2 , the manufacture peeling mounting apparatus  80  forms the base film  12  as shown in  FIG.  3 B , and advances to the next step SP 3 . Specifically, the manufacture peeling mounting apparatus  80  forms the thin film-like base film  12  made of organic material on the support layer front surface  11 A while forming the connection holes  12 H by executing a commonly known patterning process such as lithography, for example. At that time, the base film back surface  12 B of the base film  12  is formed in the state of being in contact (close contact) with the support layer front surface  11 A, and thus is formed extremely flat similarly to the support layer front surface  11 A. 
     In the step SP 3 , the manufacture peeling mounting apparatus  80  provides the light-emitting elements  13  on the base film  12  as shown in  FIG.  3 C , and advances to the next step SP 4 . The light-emitting elements  13  are manufactured separately by a prescribed LED manufacturing apparatus (not shown) or the like. The manufacture peeling mounting apparatus  80  transfers the light-emitting elements  13  to prescribed positions on the base film  12  by using a commonly known transfer technology. 
     In the step SP 4 , the manufacture peeling mounting apparatus  80  forms the connection pads  14  on parts of the base film  12  in the vicinity of the connection holes  12 H as shown in  FIG.  3 D , and advances to the next step SP 5 . Specifically, the manufacture peeling mounting apparatus  80  forms the connection pads  14  by depositing metallic material such as Au or Pt like thin films in ranges on the base film  12  surrounding the peripheries of the connection holes  12 H by a method like lithography or vapor deposition, for example. At that time, the connection pad back surface  14 B of the connection pad  14  is formed in the state of being in contact (close contact) with the support layer front surface  11 A similarly to the base film back surface  12 B of the base film  12 , and thus becomes extremely smooth. 
     In the step SP 5 , the manufacture peeling mounting apparatus  80  forms the insulation films  15  with material having the insulating property so as to overlap with parts of the light-emitting elements  13  and parts of the base film  12  as shown in  FIG.  3 E , and advances to the next step SP 6 . In the step SP 6 , the manufacture peeling mounting apparatus  80  forms the wiring parts  16  with material having electrical conductivity so as to overlap with parts of the light-emitting elements  13 , parts of the insulation films  15  and parts of the connection pads  14  as shown in  FIG.  3 F , and advances to the next step SP 7 . Parenthetically, in the steps SP 5  and SP 6 , the manufacture peeling mounting apparatus  80  can use a method like photolithography or vapor deposition, for example. 
     In the step SP 7 , the manufacture peeling mounting apparatus  80  completes the complex film  2  by forming the cover layer  17  with organic material so as to cover the upper side of the base film  12  and the like as shown in  FIG.  3 G , and advances to the next step SP 8 . At that time, the complex film  2  is in a state of having been stuck on the support layer front surface  11 A of the support layer  11 . 
     In the step SP 8 , the manufacture peeling mounting apparatus  80  forms the support gaps SG by removing parts of the support layer  11  as shown in  FIG.  4 A , and advances to the next step SP 9 . Specifically, the manufacture peeling mounting apparatus  80  forms the support gaps SG by removing parts of the support layer  11  in the vicinity of or outside an outer peripheral part of the complex film  2 , by executing an etching process by use of a prescribed chemical solution. In other words, in the step SP 8 , part of the support layer  11  is removed, thereby making area of the third surface  11 A, in contact with the functional unit  2  in remaining part of the support layer  11 , smaller than area of the second surface  2 B. 
     As above, the manufacture peeling mounting apparatus  80  is capable of manufacturing the electronic structure  1  by the steps from the step SP 1  to the step SP 8 . These steps are hereinafter referred to as a “manufacturing step set Q1”. 
     In the step SP 9 , the manufacture peeling mounting apparatus  80  makes a stamp  81  having a sticking function stick to the complex film front surface  2 A as shown in  FIG.  4 B , and advances to the next step SP 10 . Here, the electronic structure  1  with the stamp  81  sticking thereto is, roughly classified, in a state in which four types of objects: the formation substrate  10 , the support layer  11 , the complex film  2  and the stamp  81 , are successively overlaid in the Z direction. 
     In this state, magnitudes of sticking force at three parts adjoining each other differ from each other. As mentioned earlier, relatively strong sticking force F 10  acts between the formation substrate  10  and the support layer  11  both made of inorganic material. Further, relatively strong sticking force F 81  acts between the stamp  81  and the complex film front surface  2 A since the complex film front surface  2 A substantially in its whole range is in contact with the stamp  81 . 
     In contrast, relatively weak sticking force F 11  acts between the support layer  11  being inorganic material and the base film  12  being organic material due to the relatively small area of the support layer  11 , the acting of Van der Waals force, and so forth. Namely, the sticking force F 11  is weaker than both of the sticking force F 10  and the sticking force F 81 . 
     In the step SP 10 , the manufacture peeling mounting apparatus  80  shifts the stamp  81  in the Z direction in a state in which the formation substrate  10  is fixed by a prescribed fixation jig (not shown), and advances to the next step SP 11 . Accordingly, in the electronic structure  1  with the stamp  81  sticking thereto, peeling occurs at the part where the sticking force is the weakest, namely, between the base film  12  and the support layer  11 , as shown in  FIG.  4 C  and the complex film  2  is separated from the support layer  11  and the formation substrate  10 . 
     Parenthetically, in each of the base film  12  and the support layer  11 , its molecules have formed a structure having sufficient strength. Therefore, with the complex film  2 , it is impossible that part of the base film  12  separates from the base film  12  and remains on the support layer  11 ’s side or part of the support layer  11  separates from the support layer  11  and remains stuck on the base film  12 ’s side, and the base film back surface  12 B can be set in an extremely flat condition. 
     As above, the manufacture peeling mounting apparatus  80  is capable of peeling the complex film  2  in the electronic structure  1  from the formation substrate  10  and the support layer  11  by the steps from the step SP 9  to the step SP 10 . These steps are hereinafter referred to as a “peeling step set Q 2 ”. 
     In the step SP 11 , the manufacture peeling mounting apparatus  80  places the complex film  2  at a position on the upper side (Z direction side) of the wiring substrate  90  by shifting the stamp  81  as shown in  FIG.  4 D , and advances to the next step SP 12 . 
     Here, the wiring substrate  90  is a substrate that has been manufactured separately as a circuit board formed principally of glass epoxy, for example, and a mounting part  91  on which the complex film  2  should be mounted has been set on a wiring substrate front surface  90 A (hereinafter referred to also as a “wiring substrate surface”) as the wiring substrate 90’s front surface on the Z direction side. In the mounting part  91 , electrodes  92  are arranged respectively at positions corresponding to the connection pad back surfaces  14 B on the complex film back surface  2 B of the complex film  2  and a wiring pattern is formed properly with non-illustrated wiring material. Further, the wiring substrate front surface  90 A as the front surface of the wiring substrate  90  is formed extremely flat and its surface roughness is less than or equal to 10 [nm]. 
     The manufacture peeling mounting apparatus  80  places the complex film back surface  2 B at a position that is slightly separate from the mounting part  91  on the wiring substrate front surface  90 A towards the Z direction side by properly moving the stamp  81 , and thereby makes the connection pad back surfaces  14 B respectively face the electrodes  92 . 
     In the step SP 12 , the manufacture peeling mounting apparatus  80  sticks the complex film  2  on the wiring substrate  90  by shifting the stamp  81  as shown in  FIG.  4 E , and advances to the next step SP 13 . 
     Specifically, the manufacture peeling mounting apparatus  80  first moves the stamp  81  in the -Z direction and thereby places the complex film back surface  2 B in contact with the mounting part  91  of the wiring substrate front surface  90 A. By this operation, it is possible to make intermolecular force act between the complex film  2  and the wiring substrate  90  and thereby stick the complex film  2  on the mounting part  91  of the wiring substrate  90 . 
     At that time, on the complex film  2 , the complex film back surface  2 B and the wiring substrate front surface  90 A are both extremely flat and the complex film back surface  2 B in its whole range is in contact with the wiring substrate front surface  90 A. Accordingly, sticking force F 90  acting between the complex film  2  and the wiring substrate  90  becomes relatively strong and exceeds the sticking force F 81  of the stamp  81 . 
     Thereafter, the manufacture peeling mounting apparatus  80  moves the stamp  81  in the Z direction. At that time, the stamp  81  is separated from the complex film  2  since the sticking force F 81  is weaker than the sticking force F 90 . Consequently, the manufacture peeling mounting apparatus  80  is capable of sticking the complex film back surface  2 B of the complex film  2  on the wiring substrate front surface  90 A of the wiring substrate  90 , namely, mounting the complex film  2  on the wiring substrate  90 . 
     As above, the manufacture peeling mounting apparatus  80  is capable of mounting the complex film  2  on the wiring substrate  90  by the steps from the step SP 11  to the step SP 12 . These steps are hereinafter referred to as a “mounting step set Q 3 ”. 
     In the step SP 13 , the manufacture peeling mounting apparatus  80  ends the manufacture peeling mounting procedure RT 1 . For convenience of description, the manufacturing step set Q 1  from the step SP 1  to the step SP 8 , the peeling step set Q 2  from the step SP 9  to the step SP 10 , and the mounting step set Q 3  from the step SP 11  to the step SP 12  are hereinafter referred to collectively as a “manufacture peeling mounting step set Q 10 ”. 
     Incidentally, the above description has been given of the case where one manufacture peeling mounting apparatus  80  executes all of the manufacturing step set Q 1 , the peeling step set Q 2  and the mounting step set Q 3  of the manufacture peeling mounting procedure RT 1 , namely, the case where one manufacture peeling mounting apparatus  80  executes all of the manufacture of the electronic structure  1  and the peeling and the mounting of the complex film  2 . 
     However, in the first embodiment, it is also possible, for example, to make a prescribed manufacturing apparatus execute the manufacturing step set Q 1  and make a mounting apparatus installed in a place separate from the manufacturing apparatus execute the peeling step set Q 2  and the mounting step set Q 3 . In this case, the electronic structure  1  may be conveyed from the manufacturing apparatus to the mounting apparatus after the completion of the electronic structure  1  by the manufacturing step set Q 1 . 
     1-3. Effect and Other Features 
     In the above-described configuration, the electronic structure  1  according to the first embodiment is made by forming the formation substrate  10  and the support layer  11  stacked in a lower side with inorganic material while forming the base film  12  and the cover layer  17  of the complex film  2  stacked in an upper side with organic material. Further, in the electronic structure  1 , the outline of the support layer  11  is formed to be one step smaller than the outline of the base film  12  ( FIG.  1   ). 
     Accordingly, in the electronic structure  1 , the sticking force acting between the complex film back surface  2 B and the support layer front surface  11 A can be held down below the sticking force in the other parts. With this feature, in the electronic structure  1 , when force is applied to the complex film  2  in a direction of separating from the formation substrate  10 , the complex film  2  can be easily separated from the support layer  11  and easily peeled off of the support layer  11  ( FIGS.  4 B and  4 C ). 
     Especially, the electronic structure  1  is configured so as to adjust the sticking force acting between the complex film  2  and the support layer  11  by successively stacking the formation substrate  10 , the support layer  11  and the complex film  2  and thereafter removing part of the support layer  11  in the vicinity of its outer periphery by the etching process ( FIG.  1 B ). Accordingly, during storage and conveyance, the electronic structure  1  can be maintained in the state in which the complex film  2  is sticking to the formation substrate  10  and the support layer  11 , and the complex film back surface  2 B can be prevented from being damaged and its smoothness can be maintained excellently. On the other hand, when the stamp  81  is used, in the electronic structure  1 , the complex film  2  can be easily peeled from the formation substrate  10  and the support layer  11 , and can be excellently stuck on the wiring substrate  90  thanks to the complex film back surface  2 B maintained extremely smooth. 
     Here, it is assumed a case where the outline of the support layer  11  is made larger than or equal to the outline of the complex film  2  in a virtual electronic structure and the sticking operation with the support layer  11  occurs in the whole range of the complex film back surface  2 B. In this virtual electronic structure, when the area of the complex film  2  is relatively large due to largeness of the light-emitting elements  13  or the like, there is a danger that the sticking force acting on the entire complex film  2  becomes excessive and the complex film  2  cannot be peeled off of the support layer  11  by use of the stamp  81 . 
     In contrast, in the electronic structure  1  according to the first embodiment, the sticking force is intentionally decreased by reducing the contact area of the support layer  11  and the complex film  2  by removing the vicinity of the outer periphery of the support layer  11  by the etching process. Accordingly, in the electronic structure  1 , even supposing that the total area of the complex film  2  is necessitated to be large due to large areas of the light-emitting elements  13 , the connection pads  14  or the like, the magnitude of the sticking force can be adjusted appropriately by properly reducing the area of the support layer  11 . 
     Further, in the electronic structure  1 , the base film  12  and the cover layer  17  of the complex film  2  being finally necessary are made of organic material, while the formation substrate  10  and the support layer  11  being finally unnecessary are made of inorganic material. Accordingly, in the electronic structure  1 , by using an appropriate etching solution in the step of executing the etching process, the inorganic material can be removed, practically without damaging the organic material, namely, a selection ratio of the etching can be secured. 
     From another viewpoint, in the electronic structure  1 , organic material and inorganic material are placed in contact with each other in the boundary part between the support layer  11  and the base film  12  as part where the peeling occurs in a later step, by which the sticking force between the support layer  11  and the base film  12  is set relatively weak. Accordingly, in the electronic structure  1 , just by displacing the complex film front surface  2 A so as to separate from the formation substrate  10  in the peeling step set Q 2  ( FIG.  2    and  FIGS.  4 A to  4 E ), the support layer  11  and the base film  12  can be excellently separated from each other and the complex film back surface  2 B can be made extremely flat. 
     Furthermore, in the manufacturing steps of the electronic structure  1 , the front surface of the formation substrate  10  is formed extremely smooth and the support layer front surface  11 A of the support layer  11  overlaid on the formation substrate  10  is also formed extremely smooth, and thus the base film back surface  12 B of the base film  12  stacked on the support layer front surface  11 A is also formed extremely smooth. 
     Namely, in the electronic structure  1 , when the complex film  2  is peeled from the formation substrate  10  and the support layer  11 , the complex film back surface  2 B can be set in an extremely flat condition. Accordingly, just by sticking the complex film  2  peeled from the electronic structure  1  on the wiring substrate front surface  90 A of the wiring substrate  90 , sufficiently strong sticking force can be generated and necessary electrical continuity can be obtained. 
     Further, in its manufacturing steps, the complex film  2  is manufactured so as to successively stack parts on the front surface of the formation substrate  10  formed extremely flat ( FIGS.  3 A to  3 G  and  FIGS.  4 A to  4 E ). Accordingly, the complex film  2  can be manufactured with ease so as to set the complex film back surface  2 B in an extremely flat condition, namely, make the base film back surface  12 B and the connection pad back surface  14 B both extremely flat and hold down the step (level difference) between the base film back surface  12 B and the connection pad back surface  14 B to be extremely small, without the need of executing a process for specially flattening the complex film back surface  2 B. 
     Put another way, in the electronic structure  1 , the complex film back surface  2 B can be formed extremely smooth by a markedly easy process compared to cases of forming anchors on the lower surface of the complex film and executing the flattening by removing the anchors as in the Patent Reference  1 . 
     Incidentally, the electronic structure  1  in the etching process can fall into a condition in which projections and depressions have been formed (i.e., rough condition) due to reaction of the etching solution with surfaces of parts of the connection pads  14  exposed to the inside of the support gap SG. However, the electronic structure  1  is configured to leave at least part of the connection pad  14  in contact with the support layer  11  (e.g.,  FIG.  1 B ) when outline parts of the support layer  11  are removed by the etching process. Therefore, at least part of the connection pad  14  can be maintained in the flat condition on the complex film  2  separated from the electronic structure  1 , sufficiently strong sticking force can be made to act between the connection pad  14  and the electrode  92  of the wiring substrate  90 , and the electrical continuity can be achieved excellently. 
     Further, in the electronic structure  1 , the connection pad  14  is made of metallic material having extremely low ionization tendency and having electrical conductivity such as Au or Pt. Accordingly, in the electronic structure  1 , even when the etching solution contacts the connection pad  14  in the etching process for removing part of the support layer  11 , the degree of damage to the surface of the connection pad  14  can be held extremely low and the smoothness can be maintained excellently. 
     Incidentally, there are cases where an adhesive agent is used when bonding two objects together. There are adhesive agents that exhibit the adhesive function by using intermolecular force. Further, in general, an adhesive agent is in the form of liquid and two objects are brought to the bonded state by applying the adhesive agent on bonding surfaces of the objects and hardening the adhesive agent in a state of having been sandwiched between the objects. When such an adhesive agent is used, in order to peel the already bonded objects from each other, it is necessary to physically destroy the hardened adhesive agent and there is a danger of damaging the objects at the time of the destruction. 
     Further, for example, in part where electrical joining is required such as a joint between an electrode of the wiring substrate and an electrode of an element, alloy due to eutectic crystallization of the electrodes is formed by means of bump connection in many cases. In such cases, while it is also possible, for example, to remove the bump connection by means of laser removal or the like, that causes considerable damage especially to the electrode of the wiring substrate. 
     In contrast, in the first embodiment, such an adhesive agent is not used and physical and electrical connections are realized by placing the complex film back surface  2 B of the complex film  2  and the wiring substrate front surface  90 A of the wiring substrate  90  in direct contact with each other and making intermolecular force act between the complex film back surface  2 B and the wiring substrate front surface  90 A. Thus, in the first embodiment, when a defective part is detected after the mounting of the complex film  2  on the wiring substrate  90 , the complex film  2  can be peeled off with extreme ease practically without damaging the wiring substrate  90 , and a new complex film  2  can be stuck on the same position. 
     With the configuration described above, in the electronic structure  1  according to the first embodiment, the formation substrate  10  and the support layer  11  are formed with inorganic material while the base film  12  and the cover layer  17  of the complex film  2  are formed with organic material, and the outline of the support layer  11  is formed to be smaller than the outline of the base film  12 . Therefore, the electronic structure  1  is capable of appropriately adjusting the sticking force acting between the complex film back surface  2 B and the support layer front surface  11 A so that the peeling does not occur during storage and conveyance and the peeling can be executed with ease by using the stamp  81  before the mounting. Accordingly, with the electronic structure  1 , storage and conveyance can be done while maintaining the smoothness of the complex film back surface  2 B, and the peeling of the complex film  2  off of the support layer  11  and the mounting of the complex film  2  on the wiring substrate  90  can also be executed with ease. 
     2. Second Embodiment 
     2-1. Configuration of Electronic Structure and Complex Film 
       FIG.  5 A  corresponding to  FIG.  1 A  is a schematic plan view showing the configuration of an electronic structure  201  and a complex film  202  according to a second embodiment.  FIG.  5 B  corresponding to  FIG.  1 B  is a schematic cross-sectional view showing a cross section at the line V-V in  FIG.  5 A . In the second embodiment, each of the X direction, the Y direction and the Z direction is defined in the same way as in the first embodiment. 
     The electronic structure  201  has a configuration in which a support layer  211  formed in the same way as the support layer  11  is provided on a formation substrate  210  formed in the same way as the formation substrate  10  and the complex film  202  is stuck on the upper side of the support layer  211 . A support layer front surface  211 A is formed extremely smooth similarly to the support layer front surface  11 A. The complex film  302  is hereinafter referred to also as a “functional unit” or “functional film” or “composite film.” 
     The complex film  202  has a configuration partially similar to that of the complex film  2  according to the first embodiment ( FIG.  1 A ,  FIG.  1 B , etc.). Namely, the complex film  202  has a configuration in which light-emitting elements of three colors: red (R), green (G) and blue (B), are arranged to be successively aligned in the X direction, wiring members and connection terminals are connected to each of the light-emitting elements, and the components are integrated into one film-like package. Specifically, the complex film  202  is formed with light-emitting elements  213  ( 213 R,  213 G and  213 B), connection pads  214 , insulation films  215 , wiring parts  216 , a cover layer  217  and a lower electrode  224 . 
     The lower electrode  224  is a component provided in place of the connection pads  14  in the first embodiment respectively provided on the Y direction side of the light-emitting elements  13  of the respective colors, and is formed with the same material as the connection pads  14 . A lower electrode back surface  224 B as a back surface of the lower electrode  224  is in contact with the support layer front surface  211 A and is formed like a thin plate being thin in the Z direction. Further, the lower electrode  224  has a shape formed by interconnecting and integrating parts corresponding to the light-emitting elements  213  of the respective colors in the X direction. 
     While each light-emitting element  213  ( 213 R,  213 G,  213 B) is respectively made of the same material as the light-emitting element  13  ( 13 R,  13 G,  13 B) according to the first embodiment, the shape is partially different. Further, each light-emitting element  213  is arranged on the Z direction side of the lower electrode  224 . While the connection pad  214  is made of the same material as the connection pad  14  according to the first embodiment, its shape is partially different. A connection pad back surface  214 B as a back surface of the connection pad  214  is formed extremely smooth similarly to the connection pad back surface  14 B. Further, each light-emitting element  213  is provided with only one connection pad  214  on the -Y direction side of the light-emitting element  213 . 
     While the insulation film  215  is made of the same material as the insulation film  15  according to the first embodiment, its shape is partially different. Further, each light-emitting element  213  is provided with only one insulation film  215  on the -Y direction side of the light-emitting element  213 . While the wiring part  216  is made of the same material as the wiring part  16  according to the first embodiment, its shape is partially different. Further, each light-emitting element  213  is provided with only one wiring part  216  on the -Y direction side of the light-emitting element  213 . 
     While the cover layer  217  is made of the same material as the cover layer  17  according to the first embodiment, its shape is partially different. Further, the cover layer  217  is provided also in part corresponding to the base film  12  in the first embodiment. Namely, on the complex film  202 , a complex film back surface  202 B is formed by the connection pad back surfaces  214 B, the lower electrode back surface  224 B and a back surface of the cover layer  217 . The cover layer  217  is referred to also as a “protective member”. 
     Further, similarly to the electronic structure  1  according to the first embodiment, in the electronic structure  201 , the outline of the support layer  211  is one step smaller than the outline of the cover layer  217  (i.e., the outline of the complex film  202 ) in regard to the X direction and the Y direction. 
     2-2. Manufacture of Electronic Structure and Peeling and Mounting of Complex Film 
     Next, the manufacture of the electronic structure  201  and the peeling and the mounting of the complex film  202  will be described below with reference to  FIG.  6   ,  FIGS.  7 A to  7 G  and  FIGS.  8 A to  8 E  corresponding to  FIG.  2   ,  FIGS.  3 A to  3 G  and  FIGS.  4 A to  4 E .  FIG.  6    is a flowchart showing a manufacture peeling mounting procedure in regard to the manufacture of the electronic structure  201  and the peeling and the mounting of the complex film  202 .  FIGS.  7 A to  7 G  and  FIGS.  8 A to  8 E  are schematic cross-sectional views showing a manufacturing process of the electronic structure  201  and the complex film  202  stepwise. Here, similarly to the first embodiment, the Z direction side is represented also as the “upper side”, and the -Z direction side is represented also as the “lower side”. 
     Similarly to the first embodiment, the electronic structure  201  is manufactured by a manufacture peeling mounting apparatus  280  replacing the manufacture peeling mounting apparatus  80  according to various processes similar to those used when manufacturing generic semiconductors, so as to overlay layers on the formation substrate  210  stepwise. 
     Specifically, the manufacture peeling mounting apparatus  280  starting the manufacture peeling mounting procedure RT 201  ( FIG.  6   ) advances to the first step SP 201 . In the step SP 201 , similarly to the first embodiment, the manufacture peeling mounting apparatus  280  forms the support layer  211  on a front surface of the formation substrate  210  as shown in  FIG.  7 A , and advances to the next step SP 202 . 
     In the step SP 202 , the manufacture peeling mounting apparatus  280  forms the lower electrode  224  as shown in  FIG.  7 B , and advances to the next step SP 203 . Specifically, the manufacture peeling mounting apparatus  280  forms the lower electrode  224  by depositing metallic material such as Au or Pt like a thin film by a method like lithography or vapor deposition, for example. At that time, the lower electrode back surface  224 B of the lower electrode  224  is formed in the state of being in contact (close contact) with the support layer front surface  211 A, and thus is formed extremely flat. 
     Thereafter, in the steps SP 203  to SP 208 , the manufacture peeling mounting apparatus  280  manufactures the electronic structure  201  as shown in  FIG.  7 C  to  FIG.  7 G  and  FIG.  8 A  by executing steps similar to the steps SP 3  to SP 8  ( FIG.  2   ). These steps are hereinafter referred to as a “manufacturing step set Q201”. 
     In step SP 209 , similarly to the step SP 9  ( FIG.  2   ), the manufacture peeling mounting apparatus  280  makes a stamp  281  having the sticking function stick to a complex film front surface  202 A as shown in  FIG.  8 B , and advances to the next step SP 210 . Here, in the electronic structure  201  with the stamp  281  sticking thereto, force magnitude relationship similar to that in the first embodiment holds in four types of objects: the formation substrate  210 , the support layer  211 , the complex film  202  and the stamp  281  successively overlaid in the Z direction. 
     Namely, relatively strong sticking force F 210  acts between the formation substrate  210  and the support layer  211  both made of inorganic material. Further, relatively strong sticking force F 281  acts between the stamp  281  and the complex film front surface  202 A since the complex film front surface  202 A substantially in its whole range is in contact with the stamp  281 . 
     In contrast, relatively weak sticking force F 211  acts between the support layer  211  being inorganic material and the cover layer  217  being organic material due to the relatively small area of the support layer  211 , the acting of Van der Waals force, and so forth. Namely, the sticking force F 211  is weaker than both of the sticking force F 210  and the sticking force F 281 . 
     In the step SP 210 , similarly to the step SP 10  ( FIG.  2   ), the manufacture peeling mounting apparatus  280  shifts the stamp  281  in the Z direction in a state in which the formation substrate  210  is fixed by a prescribed fixation jig (not shown), and advances to the next step SP 211 . Accordingly, in the electronic structure  201  with the stamp  281  sticking thereto, peeling occurs at the part where the sticking force is the weakest, namely, between the cover layer  217  and the support layer  211 , as shown in  FIG.  8 C  and the complex film  202  is separated from the support layer  211  and the formation substrate  210 . 
     As above, the manufacture peeling mounting apparatus  280  is capable of peeling the complex film  202  in the electronic structure  201  from the formation substrate  210  and the support layer  211  by the steps from the step SP 209  to the step SP 210  similarly to the first embodiment. These steps are hereinafter referred to as a “peeling step set Q 202 ”. 
     Subsequently, in the steps SP 211  and SP 212 , the manufacture peeling mounting apparatus  280  executes processing similar to the steps SP 11  and SP 12  ( FIG.  2   ). By this processing, as shown in  FIGS.  8 D and  8 E , the manufacture peeling mounting apparatus  280  sticks and mounts the complex film  202  on a mounting part  291  provided on a wiring substrate front surface  290 A of a wiring substrate  290  and thereafter separates the stamp  281  from the complex film  202 . Accordingly, on the complex film  202 , the complex film back surface  202 B is stuck on the mounting part  291  of the wiring substrate front surface  290 A, and the connection pads  214  and the lower electrode  224  are electrically continued respectively to electrodes  292  of the wiring substrate  290 . These steps are hereinafter referred to as a “mounting step set Q 203 ”. 
     In step SP 213 , the manufacture peeling mounting apparatus  280  ends the manufacture peeling mounting procedure RT 201 . For convenience of description, the manufacturing step set Q 201  from the step SP 201  to the step SP 208 , the peeling step set Q 202  from the step SP 209  to the step SP 210 , and the mounting step set Q 203  from the step SP 211  to the step SP 212  are hereinafter referred to collectively as a “manufacture peeling mounting step set Q 210 ”. 
     2-3. Effect and Other Features 
     In the above-described configuration, the electronic structure  201  according to the second embodiment is made by forming the formation substrate  210  and the support layer  211  stacked in the lower side with inorganic material while forming the cover layer  217  of the complex film  202  stacked in the upper side with organic material. Further, in the electronic structure  201 , the outline of the support layer  211  is formed to be one step smaller than the outline of the cover layer  217  ( FIGS.  5 A and  5 B ). 
     Accordingly, similarly to the first embodiment, in the electronic structure  201 , the sticking force acting between the complex film back surface  202 B and the support layer front surface  2011 A can be held down below the sticking force in the other parts. With this feature, in the electronic structure  201 , when force is applied to the complex film  202  in a direction of separating from the formation substrate  210 , the complex film  202  can be easily separated from the support layer  211  and easily peeled off of the support layer  211  ( FIGS.  8 B and  8 C ). 
     Especially in the electronic structure  201 , the light-emitting elements  213  are arranged on the upper side of the lower electrode  224  and only one connection pad  214  is provided corresponding to one light-emitting element  213 . Accordingly, in the electronic structure  201 , the area occupied by one complex film  202  on an XY plane can be reduced compared to the electronic structure  1  according to the first embodiment and production efficiency can be increased. 
     Also in regard to other features, the electronic structure  201  according to the second embodiment can achieve effect similar to that in the first embodiment. 
     With the configuration described above, in the electronic structure  201  according to the second embodiment, the formation substrate  210  and the support layer  211  are formed with inorganic material while the cover layer  217  of the complex film  202  is formed with organic material, and the outline of the support layer  211  is formed to be smaller than the outline of the cover layer  217 . Therefore, the electronic structure  201  is capable of appropriately adjusting the sticking force acting between the complex film back surface  202 B and the support layer front surface  211 A so that the peeling does not occur during storage and conveyance and the peeling can be executed with ease by using the stamp  281  before the mounting. Accordingly, with the electronic structure  201 , storage and conveyance can be done with ease while maintaining the smoothness of the complex film back surface  202 B, and the peeling of the complex film  202  off of the support layer  211  and the mounting of the complex film  202  on the wiring substrate  290  can also be executed with ease. 
       3 . Third Embodiment 
       FIG.  9 A  is a schematic plan view showing the configuration of an electronic structure  301  according to a third embodiment.  FIG.  9 B  is a schematic cross-sectional view showing a cross section at the line IX-IX in  FIG.  9 A . The electronic structure  301  has a configuration in which a plurality of support layers  311  are provided on a formation substrate  310  and a plurality of complex films  302  are respectively stuck on the upper side of the support layers  311 . 
     The formation substrate  310  is similar to the formation substrate  210  in the second embodiment ( FIG.  5 A ,  FIG.  5 B , etc.) in the constituent material and in that the surface on the Z direction side is extremely smooth. However, the formation substrate  310  is sufficiently larger than the formation substrate  210  in size in regard to the X direction and the Y direction. 
     On the upper side (Z direction side) of the formation substrate  310 , a plurality of complex films  302  are arranged like a grid in the X direction and the Y direction. A film gap FG is formed at each part where complex films  302  adjoin each other in the X direction or the Y direction, and its spacing is a distance d. The complex film  302  is hereinafter referred to also as a “functional unit” or “functional film” or “composite film.” 
     Each complex film  302  and each support layer  311  are respectively formed similarly to the complex film  202  and the support layer  211  according to the second embodiment. Namely, a complex film back surface  302 B as a back surface of each complex film  302  and a support layer front surface  311 A of each support layer  311  are formed extremely flat. Further, the outline of the support layer  311  on an XY plane is one step smaller than that of the complex film  302 . Therefore, a support gap SG is formed around the support layer  311 . 
     For the electronic structure  301 , a procedure similar to the manufacturing step set Q 201  in the second embodiment ( FIG.  6   ,  FIGS.  7 A to  7 G  and  FIGS.  8 A to  8 E ) is executed at a plurality of positions on the upper side of the formation substrate  310  in parallel. In this case, the electronic structure  301  is manufactured stepwise by a manufacture peeling mounting apparatus  380  (details will be described later) replacing the manufacture peeling mounting apparatus  280 . 
     Subsequently, as shown in  FIG.  10 A  corresponding to  FIG.  8 C , the manufacture peeling mounting apparatus  380  performs a procedure similar to the peeling step set Q 202  in the second embodiment ( FIG.  6    and  FIGS.  8 A to  8 E ) on the complex films  302  of the electronic structure  301  in parallel. 
     Specifically, the manufacture peeling mounting apparatus  380  makes a stamp  381  stick to the complex films  302  and thereby peels the complex films  302  off of the support layers  311 . At that time, the complex films  302  maintain the state of having been neatly arranged like a grid on an XY plane and maintain the spacing between complex films  302  unchanged at the distance d. 
     Subsequently, as shown in  FIG.  10 B  corresponding to  FIG.  8 E , the manufacture peeling mounting apparatus  380  performs a procedure similar to the mounting step set Q 203  in the second embodiment ( FIG.  6    and  FIGS.  8 A to  8 E ) on the complex films  302  in parallel. Specifically, the manufacture peeling mounting apparatus  380  sticks and mounts the complex films  302  respectively on a plurality of mounting parts  391  provided on a wiring substrate front surface  390 A of a wiring substrate  390  and thereafter separates the stamp  381  from the complex films  202 . 
     Accordingly, on each complex film  302 , the complex film back surface  302 B is mounted on the mounting part  391  of the wiring substrate front surface  390 A, and the connection pads  214  and the lower electrode  224  are electrically continued respectively to electrodes  392  of the wiring substrate  390 . Further, at that time, the complex films  302  maintain the state of having been neatly arranged like a grid on an XY plane and maintain the spacing between complex films  302  unchanged at the distance d. Parenthetically, the wiring substrate  390  on which the complex films  302  have been mounted is, for example, a display panel to be installed in an LED display device, in which one complex film  302  corresponds to one pixel (picture element). 
     In the above-described configuration, the electronic structure  301  according to the third embodiment is made by arranging a plurality of support layers  311  and complex films  302  like a grid on the front surface of the formation substrate  310  ( FIGS.  9 A and  9 B ). The manufacture peeling mounting apparatus  380  makes the stamp  381  stick to the complex films  302 , and thereby peels the complex films  302  off of the support layers  311  at the same time and sticks the complex films  302  on the mounting parts  391  of the wiring substrate  390  ( FIGS.  10 A and  10 B ). 
     Namely, with the electronic structure  301 , a plurality of complex films  302  can be mounted on the wiring substrate  390  just by executing the peeling process and the mounting process only once, and thus working efficiency can be increased markedly compared to the second embodiment. 
     Further, the manufacture peeling mounting apparatus  380  maintains the arrangement of the complex films  302  while the stamp  381  sticks to the plurality of complex films  302  and then these complex films  302  are stuck on the wiring substrate  390 . Namely, the complex films  302  are maintained in the state of having been arranged like a grid and the spacing between complex films  302  is also maintained unchanged at the distance d. 
     Incidentally, suppose that the manufacture peeling mounting apparatus uses the stamp  281  according to the second embodiment ( FIGS.  8 A to  8 E ), the manufacture peeling mounting apparatus is necessitated to repeat the work of peeling one complex film  302  off of the formation substrate  310  and sticking the complex film  302  on the mounting part  391  of the wiring substrate  390 . In this case, the manufacture peeling mounting apparatus needs to adjust the position of the complex film  302  to the mounting part  391  on the wiring substrate  390 . 
     Especially in cases where the wiring substrate  390  is a display panel and each complex film  302  represents one pixel (picture element), position adjustment with extremely high accuracy is required when mounting each complex film  302 . However, in the mounting process executed by the manufacture peeling mounting apparatus, there is a possibility of causing displacement and there is also a possibility of needing a considerable time for the position adjustment. 
     In this regard, with the electronic structure  301  according to the third embodiment, the positions of the complex films  302  and the support layers  311  on the formation substrate  310  can previously be set appropriately in accordance with arrangement and spacing of the mounting parts  391  on the wiring substrate  390 . Put another way, with the electronic structure  301 , the spacing between complex films  302  can be optimized on the formation substrate  310  with positional accuracy of exposure processing or the like in the semiconductor manufacture process, and the complex films  302  can be mounted on the wiring substrate  390  while maintaining the spacing. 
     Namely, with the electronic structure  301 , by using the stamp  381  ( FIGS.  10 A and  10 B ) of the manufacture peeling mounting apparatus  380 , the complex films  302  can be mounted on the wiring substrate  390  with extremely high positional accuracy in an extremely short time necessary for executing the peeling process and the mounting process once. 
     Also in regard to other features, the electronic structure  301  according to the third embodiment can achieve effect similar to that in the second embodiment. 
     With the configuration described above, the electronic structure  301  according to the third embodiment is formed in the state of neatly arranging a plurality of support layers  311  and complex films  302  on the formation substrate  310 . On that basis, by the stamp  381  of the manufacture peeling mounting apparatus  380 , the plurality of complex films  302  are peeled from the electronic structure  301  while maintaining the positional relationship among the complex films and are mounted on the wiring substrate  390  while maintaining the positional relationship. Accordingly, with the electronic structure  301 , storage and conveyance can be done with ease while maintaining the smoothness of the complex film back surfaces  302 B, and the plurality of complex films  302  can be mounted on the mounting parts  391  of the wiring substrate  390  in a short time and with high positional accuracy. 
     4. Other Embodiments 
     In the first embodiment described earlier, a description was given of the case where a silicon substrate made of silicon (Si), a glass substrate, a sapphire substrate or the like is used as the formation substrate  10 . However, the embodiments of the present disclosure are not limited to such cases and substrates formed with various other inorganic materials may be used as the formation substrate  10 . In this case, it is permissible if the front surface of the formation substrate  10  is formed extremely smooth, e.g., its surface roughness is less than or equal to  10  [nm]. The same goes for the second and third embodiments. 
     In the first embodiment described earlier, a description was given of the case where the support layer  11  is formed as an oxide film or a nitride film made of silicon oxide (SiO 2 ) or silicon nitride (SiN). However, the support layer  11  is not limited to such cases and may be formed as a thin film made of a variety of oxide or nitride or a variety of other inorganic material. In this case, it is permissible if the support layer front surface  11 A can be formed extremely smooth and the support gap SG can be formed by removing part of the support layer  11  by the etching process in the step SP 8  of the manufacture peeling mounting procedure RT 1  ( FIG.  2   ). The same goes for the second and third embodiments. 
     In the first embodiment described earlier, a description was given of the case where the length of a side of the complex film  2  extending in the X direction or the Y direction is set at approximately 30 [µm] to 50 [µm] and the outline of the support layer  11  is situated on the inner side of the outline of the complex film  2  by approximately  5  [µm] . However, the complex film  2  is not limited to such cases and may be formed in various other sizes, such as setting the length of a side of the complex film  2  extending in the X direction or the Y direction at approximately  1  [mm] to  2  [mm] and situating the outline of the support layer  11  on the inner side of the outline of the complex film  2  by approximately 20 [µm]. The same goes for the second and third embodiments. 
     In the first embodiment described earlier, a description was given of the case where the connection pad  14  is formed with Au or Pt. However, it is also possible, for example, to form the connection pad  14  with metallic material having electrical conductivity such as Cu or Al, or alloy of multiple types of materials. In such cases, it is desirable to select an etching solution that minimizes the damaging to the surface of the connection pad  14  in the step SP 8  of the manufacture peeling mounting procedure RT 1  ( FIG.  2   ). The same goes for the connection pad  214  and the lower electrode  224  in the second embodiment and also for the third embodiment. 
     In the first embodiment described earlier, a description was given of the case where the base film  12  and the cover layer  17  of the complex film  2  is made of organic material, the support layer  11  is made of inorganic material, and part of the support layer  11  is removed by the etching process. However, the embodiments of the present disclosure are not limited to such cases and it is also possible, for example, to protect the complex film with inorganic material while forming the support layer with organic material and remove part of the support layer by the etching process. 
     Specifically, an electronic structure  401  can be formed as shown in  FIG.  11    corresponding to  FIG.  5 B , for example. The electronic structure  401  has a configuration in which a formation substrate  410 , a support layer  411  and a complex film  402  are stacked successively. The formation substrate  410  is made of the same inorganic material as the formation substrate  210 . The support layer  411  is made of organic material such as polyimide resin, for example. While the complex film  402  is formed mostly in the same way as the complex film  202 , an outer peripheral part of a cover layer  417  is covered with a protective film  431  of inorganic material. In the electronic structure  401 , the support gap SG can be formed by removing part of the support layer  411  by using an etching solution having high reactivity to organic material and low reactivity to inorganic material in the etching process. 
     In the first embodiment described earlier, a description was given of the case where the base film  12  is formed exclusively of organic material such as polyimide resin. However, the embodiments of the present disclosure are not limited to such cases and it is also possible, for example, to form the base film  12  with mixed material containing filler of inorganic material or the like while using organic material as the principal component, for a purpose like improving a variety of characteristic. In this case, the ratio of the inorganic material to the organic material is desired to be set less than or equal to approximately 10% in volume ratio. The same goes for the cover layer  17 . 
     Further, also for the support layer  11  and the formation substrate  10 , it is also possible to form the layer/substrate with mixed material containing filler of organic material or the like while using inorganic material as the principal component, besides forming the layer/substrate exclusively with inorganic material. The same goes for the second and third embodiments. 
     In the first embodiment described earlier, a description was given of the case where the formation substrate  10  is formed exclusively of inorganic material. However, the embodiments of the present disclosure are not limited to such cases and it is also possible, for example, to improve a variety of characteristic such as smoothness by performing a variety of processing/treatment such as coating on the front surface of the inorganic material. 
     It is also possible to form the formation substrate  10  in multilayer structure in which multiple types of materials are stacked properly, instead of single layer structure made of one type of material. Alternatively, it is also possible to perform a variety of processing/treatment on a surface of organic material such as the base film  12  or the cover layer  17 . The same goes for the second and third embodiments. 
     In the first embodiment described earlier, a description was given of the case where part of the support layer  11  is removed by using an etching solution in the liquid form in the step SP 8  of the manufacture peeling mounting procedure RT 1  ( FIG.   2   ). However, the embodiments of the present disclosure are not limited to such cases and it is also possible, for example, to remove part of the support layer  11  by using an etching gas in the gaseous form. The same goes for the second and third embodiments. 
     In the first embodiment described earlier, a description was given of the case where three light-emitting elements  13  are provided in the complex film  2  and have light emission colors different from each other. However, the embodiments of the present disclosure are not limited to such cases and it is also possible, for example, to provide two or less or four or more light-emitting elements  13  in the complex film  2 . Namely, it is permissible if the number of light-emitting elements  13  provided in the complex film  2  is one or more. In this case, it is permissible even if the light-emitting elements have light emission colors different from each other or at least some of the light-emitting elements have the same light emission color. Further, the arrangement of the light-emitting elements  13  is not limited to the linear arrangement in the X direction but a variety of arrangement may be employed. The same goes for the second and third embodiments. 
     In the first embodiment described earlier, a description was given of the case where the complex film  2  is provided with light-emitting elements  13  (namely, LEDs). However, the embodiments of the present disclosure are not limited to such cases and it is also possible, for example, to provide the complex film  2  with a variety of elements having a variety of electronic functions, such as electronic elements like resistors, capacitors, light-receiving elements, piezoelectric elements or a variety of sensor elements or semiconductor elements like transistors or ICs (Integrated Circuits). Also in such cases, it is permissible even if one complex film  2  is provided with a plurality of electronic elements or the like, or electronic elements or the like of the same type or different types are properly combined. The same goes for the second and third embodiments. 
     In the first embodiment described earlier, a description was given of the case where two connection pads  14  are associated with one light-emitting element  13  in the complex film  2 . Further, in the second embodiment, a description was given of the case where one connection pad  214  and one lower electrode  224  are associated with one light-emitting element  213  and three light-emitting elements  213  are associated with one lower electrode  224 . However, the embodiments of the present disclosure are not limited to such cases and it is also possible to associate one electronic element with an arbitrary number of connection pads or lower electrodes. 
     In the first embodiment described earlier, a description was given of the case where the wiring substrate  90  is implemented as a circuit board formed principally of glass epoxy. However, the embodiments of the present disclosure are not limited to such cases and it is also possible, for example, to implement the wiring substrate  90  as a variety of circuit board such as a film-like flexible circuit board. In this case, it is permissible if the complex film  2  is enabled to stick to the circuit board by forming the front surface of the circuit board extremely smooth. The same goes for the second and third embodiments. 
     In the first embodiment described earlier, a description was given of the case where the stamp  81 ’s sticking force F 81  acting on the complex film  2  is kept constant. On that basis, the sticking force F 81  is set so as to be stronger than the sticking force F 11  ( FIG.  4 B ) in the step SP 9  of the manufacture peeling mounting procedure RT 1  ( FIG.  2   ) and weaker than the sticking force F 90  ( FIG.  4 E ) in the step SP 12 . However, the embodiments of the present disclosure are not limited to such cases and it is also possible, for example, to make it possible to change the magnitude of the sticking force F 81  at the stamp  81 . In this case, it is desirable to increase the sticking force F 81  in the step SP 9  and decrease the sticking force F 81  in the step SP 12 , for example. With this feature, restriction regarding the sticking force that should be satisfied by each of the support layer  11  and the complex film  2  can be relaxed significantly and the degree of freedom in design can be increased. The same goes for the second and third embodiments. 
     In the third embodiment described earlier, a description was given of the case where the complex films  302  are arranged like a grid on an XY plane ( FIGS.  9 A and  9 B ) in regard to the arrangement of the complex films  302  in the electronic structure  301 . However, the embodiments of the present disclosure are not limited to such cases and it is also possible, for example, to arrange the complex films  302  according to a variety of arrangement pattern such as a hound’s tooth check pattern. What is essential is that each complex film  302  is arranged at a position corresponding to its respective mounting part  391  on the wiring substrate  390 . 
     In the third embodiment described earlier, a description was given of the case where the spacing between complex films  302  is set at the distance d in regard to both the X direction and the Y direction. However, the embodiments of the present disclosure are not limited to such cases and it is also possible, for example, to set the spacing in the X direction and the spacing in the Y direction differently from each other or to arrange the complex films  302  at non-constant intervals. Also in such cases, what is essential is that each complex film  302  is arranged at a position corresponding to its respective mounting part  391  on the wiring substrate  390 . 
     Further, the present invention is not limited to the embodiments and other embodiments described above. Namely, the scope of application of the present invention ranges also to embodiments obtained by arbitrarily combining part or all of the above-described embodiments and part or all of the above-described other embodiments and embodiments obtained by extracting parts from the above-described embodiments and the above-described other embodiments. 
     Furthermore, in the embodiments described earlier, a description was given of the case where the electronic structure  1  as an electronic functional structure is formed with the formation substrate  10  as a substrate, the complex film  2  as a functional unit and the support layer  11  as a support layer. However, the embodiments of the present disclosure are not limited to such cases and it is also possible to form the electronic structure with a substrate made in a variety of different configuration, the functional unit and the support layer. 
     The embodiments of the present disclosure are applicable to cases where a display panel to be installed in an LED display device is manufactured, for example. 
     5. Description of Reference Characters 
       1 ,  201 ,  301 : electronic structure,  2 ,  202 ,  302 : complex film,  2 A,  202 A: complex film front surface,  2 B,  202 B,  302 B: complex film back surface,  10 ,  210 ,  310 : formation substrate,  10 A: formation substrate front surface,  11 ,  211 ,  311 : support layer,  11 A,  211 A,  311 A: support layer front surface,  12 : base film,  12 B: base film back surface,  13 ,  213 : light-emitting element,  14 ,  214 : connection pad,  14 B,  214 B: connection pad back surface,  17 ,  217 : cover layer,  80 ,  280 ,  380 : manufacture peeling mounting apparatus,  81 ,  281 ,  381 : stamp,  90 ,  290 ,  390 : wiring substrate,  90 A,  290 A,  390 A: wiring substrate front surface,  91 ,  291 ,  391 : mounting part,  92 ,  292 ,  392 : electrode,  224 : lower electrode,  224 B: lower electrode back surface, F 10 , F 11 , F 81 , F 90 , F 210 , F 211 , F 281 : sticking force, FG: film gap, SG: support gap, d: distance, Q 1 , Q 201 : manufacturing step set, Q 2 , Q 202 : peeling step set, Q 3 , Q 203 : mounting step set, Q 10 , Q 210 : manufacture peeling mounting step set.