Patent Publication Number: US-2022231057-A1

Title: Imaging device

Description:
TECHNICAL FIELD 
     The present disclosure relates to an imaging device including a semiconductor substrate. 
     BACKGROUND ART 
     In recent years, imaging devices such as a CSP (Chip Size Package) have been developed (For example, see PTLs 1 and 2). This imaging device includes, for example, a semiconductor substrate and a protective member opposed to the semiconductor substrate. The semiconductor substrate is provided with a photoelectric conversion section such as a photodiode. The protective member is bonded to the semiconductor substrate by, for example, a bonding member including a resin material. 
     CITATION LIST 
     Patent Literature 
     PTL 1: Japanese Unexamined Patent Application Publication No. 2015-159275 
     PTL 2: Japanese Unexamined Patent Application Publication No. 2008-270650 
     SUMMARY OF THE INVENTION 
     In such an imaging device, it is desired to suppress, for example, a decrease in image quality caused by flare, etc. 
     It is therefore desirable to provide an imaging device that makes it possible to suppress a decrease in image quality. 
     An imaging device according to an embodiment of the present disclosure includes: a first semiconductor substrate; a second semiconductor substrate; an insulating film; a cut portion, a hole portion, or both; an implanted film; a protective member; and a bonding member. The first semiconductor substrate includes a light input surface and is provided with a photoelectric conversion section. The second semiconductor substrate is provided on opposite side of the first semiconductor substrate to the light input surface. The insulating film is provided on side of the first semiconductor substrate on which the light input surface is disposed. The cut portion, a hole portion, or both extend at least in a thickness direction of the insulating film. The implanted film is implanted in a portion or all in a depth direction of the cut portion, the hole portion, or both. The protective member is opposed to the first semiconductor substrate with the insulating film in between. The bonding member includes a different material from a material of the implanted film and is provided between the protective member and the insulating film. 
     In the imaging device according to the embodiment of the present disclosure, the implanted film is implanted in a portion or all in the depth direction of the cut portion, the hole portion, or both. The implanted film includes the different material from the material of the bonding member. Thus, the bonding member between the protective member and the insulating film is formed to be thinner than in a case where the cut portion or the hole portion is filled with the use of the bonding member. 
    
    
     
       BRIEF DESCRIPTION OF DRAWING 
         FIG. 1  is a block diagram illustrating an example of a functional configuration of an imaging device according to a first embodiment of the present disclosure. 
         FIG. 2  is a schematic view illustrating a cross-sectional configuration of a main portion of the imaging device illustrated in  FIG. 1 . 
         FIG. 3  is a schematic view illustrating another example (1) of the cross-sectional configuration of the imaging device illustrated in  FIG. 2 . 
         FIG. 4  is a schematic view illustrating another example (2) of the cross-sectional configuration of the imaging device illustrated in  FIG. 2 . 
         FIG. 5  is a schematic view illustrating a plan configuration of a cut portion illustrated in  FIG. 2 , etc. 
         FIG. 6A  is a schematic cross-sectional view illustrating a process of a method of manufacturing the imaging device illustrated in  FIG. 2 . 
         FIG. 6B  is a schematic cross-sectional view illustrating a process following  FIG. 6A . 
         FIG. 6C  is a schematic cross-sectional view illustrating a process following  FIG. 6B . 
         FIG. 6D  is a schematic cross-sectional view illustrating a process following  FIG. 6C . 
         FIG. 6E  is a schematic cross-sectional view illustrating a process following  FIG. 6D . 
         FIG. 6F  is a schematic cross-sectional view illustrating a process following  FIG. 6E . 
         FIG. 6G  is a schematic cross-sectional view illustrating a process following  FIG. 6F . 
         FIG. 6H  is a schematic cross-sectional view illustrating a process following  FIG. 6G . 
         FIG. 7  is a schematic cross-sectional view illustrating a process of a method of manufacturing the imaging device illustrated in  FIG. 3 . 
         FIG. 8  is a schematic cross-sectional view illustrating a process of a method of manufacturing the imaging device illustrated in  FIG. 4 . 
         FIG. 9  is a schematic view illustrating a cross-sectional configuration of a main portion of an imaging device according to a comparative example. 
         FIG. 10A  is a schematic view provided for description of reflected light that occurs in the imaging device illustrated in  FIG. 9 . 
         FIG. 10B  is a schematic view provided for description of reflected light that occurs in the imaging device illustrated in  FIG. 2 . 
         FIG. 11  is a schematic view illustrating a cross-sectional configuration of a main portion of an imaging device according to a modification example 1. 
         FIG. 12A  is a schematic cross-sectional view illustrating a process of a method of manufacturing the imaging device illustrated in  FIG. 11 . 
         FIG. 12B  is a schematic cross-sectional view illustrating a process following  FIG. 12A . 
         FIG. 13  is a schematic view illustrating a cross-sectional configuration of a main portion of an imaging device according to a modification example 2. 
         FIG. 14A  is a schematic cross-sectional view illustrating a process of a method of manufacturing the imaging device illustrated in  FIG. 13 . 
         FIG. 14B  is a schematic cross-sectional view illustrating a process following  FIG. 14A . 
         FIG. 14C  is a schematic cross-sectional view illustrating a process following  FIG. 14B . 
         FIG. 14D  is a schematic cross-sectional view illustrating a process following  FIG. 14C . 
         FIG. 15  is a schematic view illustrating a cross-sectional configuration of a main portion of an imaging device according to a second embodiment of the present disclosure. 
         FIG. 16  is a schematic view illustrating a plan configuration of a hole portion illustrated in  FIG. 15 . 
         FIG. 17  is a schematic view illustrating another example of the cross-sectional configuration of the imaging device illustrated in  FIG. 15 . 
         FIG. 18A  is a schematic cross-sectional view illustrating a process of a method of manufacturing the imaging device illustrated in  FIG. 15 . 
         FIG. 18B  is a schematic cross-sectional view illustrating a process following  FIG. 18A . 
         FIG. 19  is a schematic view illustrating a cross-sectional configuration of a main portion of an imaging device according to a modification example 3. 
         FIG. 20  is a schematic cross-sectional view illustrating a process of a method of manufacturing the imaging device illustrated in  FIG. 19 . 
         FIG. 21  is a block diagram illustrating an example of an electronic apparatus including the imaging device illustrated in  FIG. 1 , etc. 
         FIG. 22  is a block diagram depicting an example of a schematic configuration of an in-vivo information acquisition system. 
         FIG. 23  is a view depicting an example of a schematic configuration of an endoscopic surgery system. 
         FIG. 24  is a block diagram depicting an example of a functional configuration of a camera head and a camera control unit (CCU). 
         FIG. 25  is a block diagram depicting an example of schematic configuration of a vehicle control system. 
         FIG. 26  is a diagram of assistance in explaining an example of installation positions of an outside-vehicle information detecting section and an imaging section. 
     
    
    
     MODES FOR CARRYING OUT THE INVENTION 
     In the following, some embodiments of the present disclosure are described in detail with reference to the drawings. It is to be noted that description is given in the following order. 
     1. First Embodiment (an imaging device including an implanted film in a cut portion, the implanted film including an insulating material)
 
2. Modification Example 1 (an example in which the implanted film is implanted in a portion in a depth direction of the cut portion)
 
3. Modification Example 2 (an example in which a planarization film is implanted in the cut portion)
 
4. Second Embodiment (an imaging device including an implanted film in a hole portion, the implanted film including an electrically conductive material)
 
5. Modification Example 3 (an example with a cut portion and a hole portion)
 
6. Application Example (an electronic apparatus)
 
     7. Practical Application Examples 
     1. First Embodiment 
     (Functional Configuration of Imaging Device  1 ) 
       FIG. 1  illustrates an example of a functional configuration of an imaging device (imaging device  1 ) according to an embodiment of the present disclosure. The imaging device  1  includes a pixel unit  200 P, and circuitry  200 C that drives the pixel unit  200 P. The pixel unit  200 P includes, for example, a plurality of light-receiving unit regions (pixels P) in a two-dimensional arrangement. The circuitry  200 C includes, for example, a row scanning unit  201 , a horizontal selector unit  203 , a column scanning unit  204 , and a system control unit  202 . 
     In the pixel unit  200 P, for example, pixel drive lines Lread (for example, row selector lines and reset control lines) are wired for each pixel row, while vertical signal lines Lsig are wired for each pixel column. The pixel drive lines Lread transfer drive signals for signal reading from the pixel unit  200 P. One end of each of the pixel drive lines Lread is coupled to an output terminal corresponding to an associated row of the row scanning unit  201 . The pixel unit  200 P includes, for example, a pixel circuit provided for each pixel P. 
     The row scanning unit  201  includes, for example, a shift register and an address decoder, and serves as a pixel driver that drives each pixel P of the pixel unit  200 P, for example, in units of rows. Signals to be outputted from each pixel P of a pixel row selected and scanned by the row scanning unit  201  are supplied to the horizontal selector unit  203  through respective ones of the vertical signal lines Lsig. The horizontal selector unit  203  includes, for example, an amplifier and a horizontal selector switch that are provided for each of the vertical signal lines Lsig. 
     The column scanning unit  204  includes, for example, a shift register and an address decoder, and sequentially drives each of the horizontal selector switches of the horizontal selector unit  203  while scanning the horizontal selector switches. By the selection and scanning by the column scanning unit  204 , the signals of the respective pixels P to be transferred through the respective vertical signal lines Lsig are sequentially outputted to horizontal signal lines  205 . The signals outputted are inputted to, for example, an unillustrated signal processor through the respective ones of the horizontal signal lines  205 . 
     The system control unit  202  receives, for example, a clock given from outside, and data that gives a command of an operation mode. Moreover, the system control unit  202  outputs data such as internal information of the imaging device  1 . Furthermore, the system control unit  202  includes a timing generator that generates various timing signals. On the basis of the various timing signals generated in the timing generator, the system control unit  202  carries out a drive control of, for example, the row scanning unit  201 , the horizontal selector unit  203 , and the column scanning unit  204 . 
     (Configuration of Main Portion of Imaging Device  1 ) 
       FIG. 2  is a schematic cross-sectional view illustrating a configuration of a main portion of the imaging device  1 . With reference to  FIG. 2 , a specific configuration of the imaging device  1  is described. 
     The imaging device  1  is a CSP, and includes, for example, a logic chip  10 , a sensor chip  20 , and a protective member  40  in this order. Between the logic chip  10  and the sensor chip  20 , a bonding surface S is formed. Between the sensor chip  20  and the protective member  40 , an insulating film  31 , a microlens  32 , a planarization film  33 , and a bonding member  34  are provided in this order from side on which the sensor chip  20  is disposed. For example, the imaging device  1  is configured to allow side on which the logic chip  10  is disposed to be mounted on a printed circuit board such as a mother board. On the side on which the logic chip  10  is disposed, the imaging device  1  includes a rewiring  51 , a solder bump  52 , and a protective resin layer  53 . The logic chip  10  and the sensor chip  20  are electrically coupled by, for example, a through via (not illustrated). Instead of the through via, the logic chip  10  and the sensor chip  20  may be electrically coupled by metal direct bonding such as Cu—Cu bonding. Here, the microlens  32  corresponds to one specific example of a “lens” of the present disclosure. The solder bump  52  corresponds to one specific example of an “external coupling terminal”. 
     The logic chip  10  includes, for example, a semiconductor substrate  11  and a multilayered wiring layer  12 , and has a stacked structure thereof. The logic chip  10  includes, for example, a logic circuit and a control circuit. An entirety of the circuitry  200 C ( FIG. 1 ) may be provided in the logic chip  10 . Alternatively, a portion of the circuitry  200 C may be provided in the sensor chip  20 , and remainder of the circuitry  200 C may be provided in the logic chip  10 . Here, the semiconductor substrate  11  corresponds to one specific example of a “second semiconductor substrate” of the present disclosure, and the multilayered wiring layer  12  corresponds to one specific example of a “multilayered wiring layer” of the present disclosure. 
     The semiconductor substrate  11  is opposed to the protective member  40  with the multilayered wiring layer  12  and the sensor chip  20  in between. The multilayered wiring layer  12  is provided on one of main surfaces (X-Y plane) of the semiconductor substrate  11 , and the rewiring  51 , etc. are provided on the other of the main surfaces. The semiconductor substrate  11  includes, for example, a silicon (Si) substrate. A thickness of the semiconductor substrate  11  (dimension in a Z-axis direction) is, for example, 50 μm to 150 μm. 
     The multilayered wiring layer  12  is provided between the semiconductor substrate  11  and the sensor chip  20 . The multilayered wiring layer  12  includes a plurality of pad electrodes  12 M and an interlayer insulating film  122  that separates the plurality of the pad electrodes  12 M. The pad electrode  12 M includes, for example, copper (Cu) or aluminum (Al), etc. The interlayer insulating film  122  includes, for example, a silicon oxide film (SiO) or a silicon nitride film (SiN), etc. The multilayered wiring layer  12  includes a plurality of wirings (not illustrated) separated from one another by the interlayer insulating film  122 . For example, the bonding surface S is provided between the multilayered wiring layer  12  and the sensor chip  10 . 
     A hole H is provided at a predetermined position of the semiconductor substrate  11 . The hole H is provided for electrical coupling of the pad electrode  12 M and the rewiring  51 . The hole H extends through the semiconductor substrate  11  from the other of the main surfaces of the semiconductor substrate  11  to the one of the main surfaces of the semiconductor substrate  11 , and reaches the pad electrode  12 M of the multilayered wiring layer  12 . 
     The rewiring  51  is provided in the vicinity of the hole H, and covers a side wall and a bottom surface of the hole H. In the bottom surface of the hole H, the rewiring  51  is in contact with the pad electrode  12 M of the multilayered wiring layer  12 . The rewiring  51  is extended from the hole H to the other of the main surfaces of the semiconductor substrate  11 , and is led to a region where the solder bump  52  is formed. The rewiring  51  is disposed in a selective region of the other of the main surfaces of the semiconductor substrate  11 . The rewiring  51  includes, for example, copper (Cu), tungsten (W), titanium (Ti), tantalum (Ta), a titanium tungsten alloy (TiW), or polysilicon, etc. A thickness of the rewiring  51  is, for example, about several μm to several tens of 
     Between the rewiring  51  and the semiconductor substrate  11 , an insulating film (not illustrated) is provided. The insulating film covers the side wall of the hole H from the other of the main surfaces of the semiconductor substrate  11 . The insulating film includes, for example, a silicon oxide film (SiO) or a silicon nitride film (SiN), etc. 
     The solder bump  52  is coupled to the rewiring  51  that is led to the other of the main surfaces of the semiconductor substrate  11 . The solder bump  52  serves as an external coupling terminal for mounting on a printed circuit board, and includes, for example, lead-free high melting point solder such as tin (Sn)-silver (Ag)-copper (Cu), etc. For example, a plurality of the solder bumps  52  is provided in a regular arrangement at a predetermined pitch on the other of the main surfaces of the semiconductor substrate  11 . The arrangement of the solder bumps  52  is appropriately set in accordance with positions of bonding pads on the printed circuit board (not illustrated) on which the imaging device  1  is to be mounted. The solder bumps  52  are electrically coupled to the pad electrodes  12 M of the multilayered wiring layer  12  through the rewiring  51 . Other external coupling terminals may be used instead of the solder bumps  52 . For example, the external coupling terminals may include a metal film such as copper (Cu) or nickel (Ni), etc. formed using a plating method. 
     The protective resin layer  53  provided on the other of the main surfaces of the semiconductor substrate  11  is provided for protection of the rewiring  51 . The protective resin layer  53  has an opening that makes a portion of the rewiring  51  exposed. The solder bump  52  is disposed in the opening of the protective resin layer  53 . That is, the solder bump  52  is coupled to the rewiring  51  in a portion exposed from the protective resin layer  53 . The protective resin layer  53  is, for example, a solder resist, and includes an epoxy based resin, a polyimide based resin, a silicon based resin, or an acrylic resin, etc. 
     The sensor chip  20  provided between the logic chip  10  and the protective member  40  includes, for example, a multilayered wiring layer (not illustrated) and a semiconductor substrate  21  in this order from side on which the logic chip  10  is disposed. Here, the semiconductor substrate  21  corresponds to one specific example of a “first semiconductor substrate” of the present disclosure. 
     The multilayered wiring layer of the sensor chip  20  is in contact with the multilayered wiring layer  12  of the logic chip  10 . Between them, for example, the bonding surface S between the sensor chip  20  and the logic chip  10  is provided. The multilayered wiring layer of the logic chip  10  includes a plurality of wirings, and an interlayer insulating film that separates the plurality of the wirings. In the multilayered wiring layer of the sensor chip  20 , for example, the pixel circuit of the pixel unit  200 P ( FIG. 1 ) is provided. 
     The semiconductor substrate  21  includes, for example, a silicon (Si) substrate. The semiconductor substrate  21  is provided with a light input surface  21 S. For example, one of main surfaces of the semiconductor substrate  21  constitutes the light input surface  21 S. On the other of the main surfaces, the multilayered wiring layer is provided. In the semiconductor substrate  21  of the sensor chip  20 , a photodiode (PD)  211  is provided for each pixel P. The PD  211  is provided in the vicinity of the light input surface  21 S of the semiconductor substrate  21 . Here, the PD  211  corresponds to one specific example of a “photoelectric conversion section” of the present disclosure. 
     The insulating film  31  provided between the semiconductor substrate  21  and the microlens  32  has a function of planarizing the light input surface  21 S of the semiconductor substrate  21 . The insulating film  31  includes, for example, silicon oxide (SiO), etc. Here, the insulating film  31  corresponds to one specific example of an “insulating film” of the present disclosure. 
     The microlens  32  on the insulating film  31  is provided for each pixel P, at a position opposed to the PD  211  of the sensor chip  20 . The microlens  32  is configured to collect light entering the microlens  32 , on the PD  211  for each pixel P. A lens system of the microlens  32  is set to a value corresponding to a size of the pixel P. Examples of a lens material of the microlens  32  include a silicon oxide film (SiO) and a silicon nitride film (SiN), etc. The microlens  32  may include an organic material. A material constituting the microlens  32  is provided in, for example, a film shape outside the pixel unit  200 P. A color filter may be provided between the microlens  32  and the insulating film  31 . 
     The planarization film  33  is provided between the microlens  32  and the bonding member  34 . The planarization film  33  is provided over substantially an entire surface of the light input surface  21 S of the semiconductor substrate  21 , to cover the microlens  32 . This leads to planarization of the light input surface  21 S of the semiconductor substrate  21  on which the microlens  32  is provided. The planarization film  33  includes, for example, a silicon oxide film (SiO) or a resin material. Examples of the resin material includes an epoxy based resin, a polyimide based resin, a silicon based resin, and an acrylic resin. For example, the planarization film  33  is provided with a cut portion C along a thickness direction. 
     The cut portion C is provided, for example, to extend from the planarization film  33  in a stacking direction of the imaging device  1  (Z-axis direction). The cut portion C is provided in, for example, the planarization film  33 , the insulating film  31 , the sensor chip  20 , and the logic chip  10 . That is, the cut portion C extends through the planarization film  33 , the insulating film  31 , the semiconductor substrate  21 , and the multilayered wiring layer  12 . The cut portion C is formed by, for example, digging from the planarization film  33  to halfway in a thickness direction of the semiconductor substrate  11  (a groove V in  FIG. 6B  to be described later). A bottom surface of the cut portion C is provided, for example, inside the semiconductor substrate  11  of the logic chip  10 . It suffices for the cut portion C to be provided over at least a thickness direction of the insulating film  31 . For example, the cut portion C may be provided to extend from the insulating film  31  in the stacking direction of the imaging device  1 . The cut portion C has, for example, a rectangular cross-sectional shape. 
       FIGS. 3 and 4  illustrate other examples of the cross-sectional configuration of the imaging device  1 . As illustrated, the cut portion C of the imaging device  1  may have other cross-sectional shapes than rectangular. For example, as illustrated in  FIG. 3 , the cut portion C may have a tapered shape. Specifically, in the cut portion C, a width of the cut portion C is gradually reduced as goes from the planarization film  33  toward the semiconductor substrate  11 . Alternatively, as illustrated in  FIG. 4 , the cut portion C may have a step. Specifically, in the cut portion C, the width of the cut portion C is stepwise reduced as goes from the planarization film  33  toward the semiconductor substrate  11 . 
       FIG. 5  illustrates an example of a planar shape of the cut portion C. A cross-sectional configuration along a line illustrated in  FIG. 5  corresponds to  FIG. 2 . The cut portion C is provided, for example, on a periphery of the imaging device  1  (insulating film  31 ), and surrounds the pixel unit  200 P in plan view. A planar shape of the cut portion C is, for example, a rectangle. 
     In the present embodiment, an implanted film  35  is implanted in the cut portion C. The implanted film  35  is different from the bonding member  34  and includes a material different from a material of the bonding member  34 . As is described later in detail, this makes it possible to form the bonding member  34  thinner than in a case where the cut portion C is filled with the use of the bonding member  34 . 
     The implanted film  35  is implanted, for example, in all in a depth direction of the cut portion C from the bottom surface of the cut portion C. A front surface of the planarization film  33  (surface on side on which the bonding member  34  is disposed) and a front surface of the implanted film  35  are substantially level with each other. The implanted film  35  includes, for example, an insulating material having low water permeability. The implanted film  35  includes, for example, an inorganic insulating material such as silicon nitride (SiN) and silicon oxynitride (SiON). The implanted film  35  may include an organic insulating material such as siloxane. As described above, providing the cut portion C on the periphery of the imaging device  1  and implanting the implanted film  35  having low water permeability in the cut portion C make it possible to suppress intrusion of moisture into the imaging device  1  through an end portion. 
     The protective member  40  is opposed to the sensor chip  20  with the insulating film  31 , the microlens  32 , and the planarization film  33  in between. The protective member  40  covers the light input surface  21 S of the semiconductor substrate  21 . The protective member  40  includes, for example, a transparent substrate such as a glass substrate. On a front surface of the protective member  40  (surface opposite to a surface on side on which the sensor chip  20  is disposed) or on a back surface of the protective member  40  (surface on the side on which the sensor chip  20  is disposed), for example, an IR (infrared) cut filter or the like may be provided. The protective member  40  is opposed to the logic chip  10  with the sensor chip  20  in between. 
     The bonding member  34  provided between the protective member  40  and the microlens  32  has, for example, a refractive index substantially the same as a refractive index of the protective member  40 . For example, in a case where the protective member  40  is a glass substrate, the bonding member  34  includes preferably a material having a refractive index of about 1.51. The bonding member  34  is provided so as to fill space between the protective member  40  and the sensor chip  20 . That is, the imaging device  1  has a so-called cavity-less structure. The bonding member  34  includes, for example, a light-transmitting resin material. A thickness of the bonding member  34  is, for example, 10 μm to 50 μm. 
     (Method of Manufacturing Imaging Device  1 ) 
     Description is given next of a method of manufacturing the imaging device  1  with reference to  FIGS. 6A to 6J . 
     First, as illustrated in  FIG. 6A , a logic wafer  10 W and a sensor wafer  20 W are bonded to form the bonding surface S. The logic wafer  10 W includes the semiconductor substrate  11  and the multilayered wiring layer  12 . The sensor wafer  20 W includes the semiconductor substrate  21  and the multilayered wiring layer (not illustrated). The PD  211  is formed in the semiconductor substrate  21 . Moreover, on the light input surface  21 S of the semiconductor substrate  21 , the insulating film  31 , the microlens  32 , and the planarization film  33  are formed. Each of the logic wafer  10 W and the sensor wafer  20 W is provided with a plurality of chip regions A. In a post-process, the logic wafer  10 W is singulated for each chip region A to form the logic chip  10 , while the sensor wafer  20 W is singulated for each chip region A to form the sensor chip  20 . 
     Next, as illustrated in  FIG. 6B , a groove V is formed in a scribe line between the adjacent chip regions A. In a post-process, the groove V contributes to formation of the cut portion C of the imaging device  1 . The groove V is formed, for example, to extend from the front surface of the planarization film  33  through the insulating film  31 , the sensor wafer  20 W, and the multilayered wiring layer  12 , and thereafter, is dug halfway in the thickness direction of the semiconductor substrate  11 . For example, the groove V having a rectangular cross-sectional shape is formed. 
       FIGS. 7 and 8  illustrate other examples of the process of forming the groove V. As illustrated in  FIG. 7 , the groove V may have a shape that decreases in width gradually as goes from the planarization film  33  toward the semiconductor substrate  11 . That is, the groove V may be formed in a tapered shape. By forming the groove V illustrated in  FIG. 7 , the cut portion C illustrated in  FIG. 3  is formed in a post-process. Alternatively, as illustrated in  FIG. 8 , the groove V may be formed in a shape that decreases in width stepwise as goes from the planarization film  33  toward the semiconductor substrate  11 . By forming the groove V illustrated in  FIG. 8 , the cut portion C illustrated in  FIG. 4  is formed in a post-process. 
     After the groove V is formed, as illustrated in  FIG. 6C , the implanted film  35  is formed on the planarization film  33  so as to fill the groove V. The implanted film  35  is formed by, for example, forming a film of silicon nitride (SiN) with the use of a CVD (Chemical Vapor Deposition) method. At this occasion, in the groove V ( FIGS. 7 and 8 ) that decreases in width as goes from the planarization film  33  toward the semiconductor substrate  11 , it is possible to easily form the implanted film  35  in the bottom of the groove V, as compared to a case with the groove V of a constant width. In other words, by forming the groove V that decreases in width as goes from the planarization film  33  toward the semiconductor substrate  11 , it is possible to enhance implanting property of the implanted film  35 . 
     After the implanted film  35  is formed, as illustrated in  FIG. 6D , the planarization film  33  and the implanted film  35  are planarized. Specifically, a surface on side on which the implanted film  35  is disposed is subjected to CMP (Chemical Mechanical Polishing), or is etched back, to form the front surface of the implanted film  35  to be level with the front surface of the planarization film  33 . 
     Subsequently, as illustrated in  FIG. 6E , the protective member  40  is bonded to the sensor wafer  20 W with the planarization film  33  in between. The protective member  40  is bonded to the sensor wafer  20 W using the bonding member  34 . Although details are described later, here, the groove V is filled with the implanted film  35 . Thus, the thickness of the bonding member  34  is reduced, as compared to the case where the bonding member  34  is implanted in the groove V. 
     After the protective member  40  is bonded to the sensor wafer  20 W, as illustrated in  FIG. 6F , the hole H is formed in the logic wafer  10 W. For example, the hole H extends through the semiconductor substrate  11  and reaches the pad electrode  12 M of the multilayered wiring layer  12 . 
     After the hole H is formed, as illustrated in  FIG. 6G , the rewiring  51  is formed. The rewiring  51  is electrically coupled to the pad electrode  12 M. The rewiring  51  is formed, for example, as follows. First, a film of resist material is formed on the other of the main surfaces of the semiconductor substrate  11 , and thereafter, an opening is formed in a selective region of the resist film. The opening is formed in the vicinity of the hole H. Next, using the resist film with the opening as a mask, a copper (Cu) film is formed by an electrolytic plating method. In this way, it is possible to form the rewiring  51  in the selective region in the vicinity of the hole H. 
     After the rewiring  51  is formed, as illustrated in  FIG. 6H , a protective resin layer  53  is formed to cover the rewiring  51 . An opening is formed in the protective resin layer  53 . The opening is provided for coupling the solder bump  52  to the rewiring  51 . After the protective resin layer  53  is formed, the solder bump  52  is formed (see  FIG. 2 ). For example, it is possible to form the solder bump  52  by providing a ball-shaped solder material in the opening of the protective resin layer  53 , and thereafter, subjecting the solder material to a heat treatment to form the solder material into a bump shape. Thereafter, dicing is performed along the scribe line. Thus, singulation is made for each chip region A, and the imaging device  1  is formed. 
     In the method of manufacturing the imaging device  1 , the groove V is formed in the scribe line. This leads to relaxation of stress to be applied to interfaces between films of the imaging device  1  during singulation. Hence, it is possible to suppress the films from peeling off and cracking. Furthermore, it is possible to suppress intrusion of moisture into the imaging device  1  caused by the peeling off and cracking of the films. In addition, here, the implanted film  35  having low water permeability is implanted in the groove V. This leads to more effective suppression of intrusion of moisture into the imaging device  1 . 
     (Workings and Effects of Imaging Device  1 ) 
     In the imaging device  1  of the present embodiment, the implanted film  35  is implanted in the cut portion C. This leads to reduction in the thickness of the bonding member  34 , as compared to the case where the bonding member  34  is implanted in the cut portion C. In the following, such workings and effects are described by giving a comparative example. 
       FIG. 9  illustrates a schematic cross-sectional configuration of a main portion of an imaging device (imaging device  100 ) according to the comparative example. The imaging device  100  includes the logic chip  10 , the sensor chip  20 , and the protective member  40 . Between the protective member  40  and the sensor chip  20 , the insulating film  31 , the microlens  32 , the planarization film  33 , and the bonding member  34  are provided in this order from the side on which the sensor chip  20  is disposed. On the periphery of the imaging device  100 , the cut portion C is provided from the planarization film  33  to the semiconductor substrate  11 . In the imaging device  100 , the bonding member  34  is implanted in the cut portion C. In this regard, the imaging device  100  is different from the imaging device  1 . 
     In such an imaging device  100 , at the time of manufacture, the groove V (see  FIG. 6B ) is filled with the bonding member  34 . This makes it difficult to reduce the thickness of the bonding member  34 . In the imaging device  100 , for example, the thickness of the bonding member  34  is larger than 50 μm. The thickness of the bonding member  34  of the imaging device  100  is, for example, greater than 50 μm and smaller than or equal to 200 μm. In a case with the bonding member  34  having a great thickness, spread of light reflected from between the sensor chip  20  and the protective member  40  becomes greater. This causes ring-shaped flare to be easily recognized. 
     Description is given of relation between the thickness of the bonding member  34  and generation of flare, with reference to  FIGS. 10A and 10B . Reflected light L R  illustrated in  FIGS. 10A and 10B  is derived from light L reflected from between the sensor chip  20  and the protective member  40  on the travel from a light source toward the sensor chip  20 .  FIG. 10A  illustrates the reflected light L R  of the imaging device  100 , and  FIG. 10B  illustrates the reflected light L R  of the imaging device  1 . The imaging device  100  includes the bonding member  34  having a thickness t 1 , while the imaging device  1  includes the bonding member  34  having a thickness t 2 . The thickness t 1  is greater than the thickness t 2  (t 1 &gt;t 2 ). 
     In the imaging devices  1  and  100  of the cavity-less structure, the space between the protective member  40  and the sensor chip  20  is filled with the bonding member  34  having the refractive index comparable to the refractive index of the protective member  40 . Accordingly, the light L is reflected from a front surface of the sensor chip  20  and enters the protective member  40  at an angle equal to or greater than a critical angle, causing total reflection. The reflected light L R  enters the pixel unit  200 P ( FIG. 1 ). Reducing a distance from a position where the light L directly enters the pixel unit  200 P to a position where the reflected light L R  enters the pixel unit  200 P (distances d 1  and d 2  described later) suppresses flare from being recognized. It is to be noted that in an imaging device of a cavity structure, such entrance of the reflected light to the pixel unit is less likely to occur. 
     In the imaging device  100 , by reducing the thickness of the protective member  40 , it is possible to reduce, to some extent, the distance d 1  from the position where the light L directly enters the pixel unit  200 P to the position where the reflected light L R  enters the pixel unit  200 P. However, because the thickness t 1  of the bonding member  34  is large, it is difficult to sufficiently reduce the distance d 1  ( FIG. 10A ). In contrast, in the imaging device  1 , it is possible to easily reduce the thickness t 2  of the bonding member  34  ( FIG. 10B ) in addition to the thickness of the protective member  40 . Hence, it is possible to sufficiently reduce the distance d 2  (d 1 &gt;d 2 ) from the position where the light L directly enters the pixel unit  200 P to the position where the reflected light L R  enters the pixel unit  200 P. This leads to reduction in visibility of flare. 
     As described above, in the imaging device  1  according to the present embodiment, the implanted film  35  is implanted in the cut portion C. Accordingly, it is possible to reduce the thickness (thickness t 2 ) of the bonding member  34  as compared to the case where the cut portion C is filled with the use of the bonding member  34 . This makes it possible to reduce the spread of the light (reflected light L R ) reflected from between the semiconductor substrate  21  (sensor chip  20 ) and the protective member  40 . Hence, it is possible to suppress a decrease in image quality caused by flare, etc. 
     Moreover, in the imaging device  1 , the implanted film  35  is implanted in all in the depth direction of the cut portion C. Hence, it is possible to reduce the thickness t 2  of the bonding member  34  more effectively than in a case where the implanted film  35  is implanted in a portion in the depth direction of the cut portion C (for example, an imaging device  1 A in  FIG. 11  described later). 
     Furthermore, in the imaging device  1 , a chip end face is covered with the implanted film  35  having low water permeability. Hence, it is possible to suppress intrusion of moisture through the end face. 
     Description is given below of modification examples of the forgoing first embodiment and other embodiments. However, in the following description, the same constituent elements as those of the forgoing embodiment are denoted by the same reference numerals, and description thereof is omitted as appropriate. 
     Modification Example 1 
       FIG. 11  illustrates a schematic cross-sectional configuration of a main portion of an imaging device (imaging device  1 A) according to a modification example 1 of the forgoing first embodiment. Here, the implanted film  35  is implanted in a portion in the depth direction of the cut portion C. Except for this point, the imaging device  1 A according to the modification example 1 has a similar configuration to the imaging device  1  of the forgoing first embodiment, and has similar workings and effects. 
     The cut portion C is provided in, for example, the planarization film  33 , the insulating film  31 , the sensor chip  20 , and the logic chip  10 . The bottom surface of the cut portion C is provided, for example, halfway in the thickness direction of the semiconductor substrate  11 . The cross-sectional shape of the cut portion C is, for example, rectangular ( FIG. 11 ). The cut portion C may have other cross-sectional shapes than rectangular (see  FIGS. 3 and 4 ). A height of the implanted film  35  (dimension in the Z-axis direction) is smaller than the depth of the cut portion C, and the front surface of the implanted film  35  is provided, for example, inside the semiconductor substrate  21 . That is, in the Z-axis direction, the front surface of the implanted film  35  is disposed at a position closer to the bottom surface of the cut portion C than the front surface of the planarization film  33  is. In the cut portion C, the implanted film  35  and the bonding member  34  are implanted in this order from side on which the bottom surface of the cut portion C is disposed. 
     Such an imaging device  1 A can be manufactured, for example, as follows ( FIGS. 12A and 12B ). 
     First, in a similar manner to as described in the forgoing first embodiment, the groove V is formed by digging from the planarization film  33  to the semiconductor substrate  11  (see  FIG. 6B ). For example, the groove V having the rectangular cross-sectional shape is formed. In a similar manner to as described in the forgoing first embodiment, the groove V may be formed that decreases in width gradually or stepwise as goes from the insulating film  31  toward the semiconductor substrate  11  ( FIGS. 7 and 8 ). 
     Next, as illustrated in  FIG. 12A , the implanted film  35  is formed so as to fill a portion in the depth direction of the groove V. The implanted film  35  is formed by, for example, forming a film of an organic insulating material such as a resin using a coating method. Examples of the organic insulating material include siloxane and epoxy resin, etc. 
     After the implanted film  35  is formed, as illustrated in  FIG. 12B , the protective member  40  is bonded to the sensor wafer  20 W. The protective member  40  is bonded using the bonding member  34 . Here, a portion in the depth direction of the groove V is filled with the implanted film  35 . Accordingly, the thickness of the bonding member  34  is reduced, as compared to the case where the bonding member  34  is implanted in all in the depth direction of the groove V. 
     After the protective member  40  is bonded to the sensor wafer  20 W, the imaging device  1 A can be manufactured in a similar manner to as described in the forgoing first embodiment. 
     In the imaging device  1 A according to the present modification example, the implanted film  35  is implanted in a portion in the depth direction of the cut portion C. Accordingly, the thickness of the bonding member  34  is reduced, as compared to the case where the bonding member  34  is implanted in all in the depth direction of the cut portion C. Hence, it is possible to suppress a decrease in image quality caused by flare, etc. Moreover, in the imaging device  1 A, it suffices to form the implanted film  35  in a portion in the depth direction of the groove V ( FIG. 12A ). This renders unnecessary the planarization process of the implanted film  35  and the planarization film  33  (for example, the process in  FIG. 6D  of the imaging device  1 ). Accordingly, it is possible to reduce manufacturing costs caused by the planarization process. In addition, it is possible to suppress deterioration of the pixel unit  200 P caused by the planarization process. Hence, it is possible to suppress, for example, generation of noise, leading to further enhancement in image quality. 
     Modification Example 2 
       FIG. 13  schematically illustrates a cross-sectional configuration of a main portion of an imaging device (imaging device  1 B) according to a modification example 2 of the forgoing first embodiment. Here, the planarization film  33  is implanted in the cut portion C. Except for this point, the imaging device  1 B according to the modification example 2 has a similar configuration to the imaging device  1  of the forgoing first embodiment, and has similar workings and effects. 
     The planarization film  33  covers the microlens  32  and is implanted in, for example, all in the depth direction of the cut portion C. The cross-sectional shape of the cut portion C is, for example, rectangular ( FIG. 13 ). The cut portion C may have other cross-sectional shapes than rectangular (see  FIGS. 3 and 4 ). The planarization film  33  is continuously provided, for example, from over the microlens  32  to an inside of the cut portion C. That is, the planarization film  33  has a function as an implanted film in the cut portion C, together with a function of planarizing the light input surface  21 S of the semiconductor substrate  21 . In other words, a material of the planarization film  33  is the same as a material of the implanted film. Here, the planarization film  33  corresponds to one specific example of the implanted film of the present disclosure. 
     A refractive index of the material of the planarization film  33  is preferably lower than the refractive index of the material of the microlens  32 . This causes light entering the microlens  32  to be efficiently collected on the PD  211 . For example, in a case where the material of the microlens  32  is a silicon nitride film (refractive index 1.8), siloxane (refractive index 1.4) can be used as the material of the planarization film  33 . 
     Such an imaging device  1 B can be manufactured, for example, as follows ( FIGS. 14A to 14D ). 
     First, as illustrated in  FIG. 14A , the logic wafer  10 W and the sensor wafer  20 W are bonded to form the bonding surface S. The logic wafer  10 W includes the semiconductor substrate  11  and the multilayered wiring layer  12 . The sensor wafer  20 W includes the semiconductor substrate  21  and the multilayered wiring layer (not illustrated). The PD  211  is formed on the semiconductor substrate  21 . Moreover, on the light input surface  21 S of the semiconductor substrate  21 , the insulating film  31  and the microlens  32  are formed. 
     Next, as illustrated in  FIG. 14B , the groove V is formed in the scribe line between the adjacent chip regions A. The groove V is formed, for example, to extend from a front surface of the insulating film  31  through the sensor wafer  20 W and the multilayered wiring layer  12 , and thereafter, is dug halfway in the thickness direction of the semiconductor substrate  11 . For example, the groove V having the rectangular cross-sectional shape is formed. In the similar manner to as described in the forgoing first embodiment, the groove V may be formed that has the shape that decreases in width gradually or stepwise as goes from the insulating film  31  toward the semiconductor substrate  11  (see  FIGS. 7 and 8 ). 
     After the groove V is formed, as illustrated in  FIG. 14C , the planarization film  33  is formed on the microlens  32  to fill the groove V. The planarization film  33  is formed by, for example, forming a film of siloxane using a CVD method or a coating method. 
     After the planarization film  33  is formed, as illustrated in  FIG. 14D , the protective member  40  is bonded to the sensor wafer  20 W with the planarization film  33  in between. The protective member  40  is bonded to the sensor wafer  20 W using the bonding member  34 . Here, the groove V is filled with the planarization film  33 . Accordingly, the thickness of the bonding member  34  is reduced, as compared to the case where the bonding member  34  is implanted in the groove V. Before the protective member  40  is bonded to the sensor wafer  20 W, a process may be provided in which the planarization film  33  is subjected to CMP or is etched back to adjust the thickness of the planarization film  33 . 
     After the protective member  40  is bonded to the sensor wafer  20 W, the imaging device  1 B can be manufactured in the similar manner to as described in the forgoing first embodiment. 
     In the imaging device  1 B according to the present modification example, the planarization film  33  is implanted in the cut portion C. Accordingly, the thickness of the bonding member  34  is reduced, as compared to the case where the bonding member  34  is implanted in the cut portion C. Hence, it is possible to suppress a decrease in image quality caused by flare, etc. Moreover, in the imaging device  1 B, the planarization film  33  covers the microlens  32  and is implanted in the groove V. This makes it possible to reduce the number of processes, as compared to a case where the process of forming the planarization film  33  and the process of forming the implanted film in the groove V (see  FIG. 6C ) are separately performed. Hence, it is possible to reduce the manufacturing costs. 
     Second Embodiment 
       FIG. 15  schematically illustrates a cross-sectional configuration of a main portion of an imaging device (imaging device  2 ) according to a second embodiment of the present disclosure. The imaging device  2  includes a hole portion M that extends through the planarization film  33 , the insulating film  31 , and the sensor chip  20  to reach the pad electrode  12 M. In the hole portion M, an electrically conductive implanted film (implanted film  15 ) is implanted. That is, the hole portion M is provided instead of the cut portion C ( FIG. 1 ) of the forgoing first embodiment. Except for this point, the imaging device  1  according to the second embodiment has a similar configuration to the imaging device  1  of the forgoing first embodiment, and similar workings and effects. 
       FIG. 16  schematically illustrates an example of a plan configuration of the hole portion M together with the planarization film  33 . A cross-sectional configuration along a line XXV-XXV′ illustrated in  FIG. 16  corresponds to  FIG. 15 . The imaging device  2  has a plurality of the hole portions M outside the pixel unit  200 P. The plurality of the hole portions M is disposed to be spaced away from one another. Each of the plurality of the hole portions M has, for example, a rectangular planar shape. For example, the plurality of the hole portions M is disposed to surround the pixel unit  200 P in plan view. Each of the plurality of the hole portions M may have other planar shapes than rectangular, for example, circular, etc. 
     Although details are described later, the hole portion M and the implanted film  15  are provided for performing, for example, an inspection using a needle in a wafer state during a manufacturing process of the imaging device  2 . The hole portion M is provided in, for example, the planarization film  33 , the insulating film  31 , the sensor chip  20 , and the multilayered wiring layer  12  (logic chip  10 ). The hole portion M is formed by, for example, digging from the planarization film  33  to the pad electrode  12 M of the multilayered wiring layer  12  (hole portion M in  FIG. 18A  described later). At a bottom surface of the hole portion M, the pad electrode  12 M is exposed. The hole portion M has, for example, a rectangular cross-sectional shape. The hole portion M may have other cross-sectional shapes than rectangular. For example, a width of the hole portion M may be reduced gradually or stepwise as goes from the planarization film  33  toward the multilayered wiring layer  12  (see  FIGS. 3 and 4 ). The hole portion M is disposed, for example, at a position opposed to the hole H. 
     The implanted film  15  is implanted, for example, in all in the depth direction of the hole portion M. The front surface of the planarization film  33  (surface on the side on which the bonding member  34  is disposed) and a front surface of the implanted film  15  are substantially level with each other. The implanted film  15  includes, for example, an electrically conductive metal material. Examples of the electrically conductive metal material include aluminum (Al), copper (Cu), and nickel (Ni), without limitation. The implanted film  15  is electrically coupled to the pad electrode  12 M. For example, a wiring coupled to the pad electrode  12  may be provided, and the implanted film  15  may be coupled to the wiring. At this occasion, the hole portion M may be disposed at a position deviated from the position opposed to the hole H. 
       FIG. 17  illustrates another example of the cross-sectional configuration of the main portion of the imaging device  2 . As illustrated, the implanted film  15  may be implanted in a portion in the depth direction of the hole portion M. At this occasion, a height of the implanted film  15  is smaller than a depth of the hole portion M, and the front surface of the implanted film  15  is provided, for example, inside the semiconductor substrate  21 . That is, in the Z-axis direction, the front surface of the implanted film  15  is disposed at a position closer to the bottom surface of the hole portion M (pad electrode  12 M) than the front surface of the planarization film  33  is. In the hole portion M, the implanted film  15  and the bonding member  34  are implanted in this order from side on which the bottom surface is disposed. 
     Such an imaging device  2  can be manufactured, for example, as follows ( FIGS. 18A and 18B ). 
     First, in the similar manner to as described in the forgoing first embodiment, the logic wafer  10 W and the sensor wafer  20 W are bonded to form the bonding surface S. The logic wafer  10 W includes the semiconductor substrate  11  and the multilayered wiring layer  12 . The sensor wafer  20 W includes the semiconductor substrate  21  and the multilayered wiring layer (not illustrated). The PD  211  is formed on the semiconductor substrate  21 . Moreover, on the light input surface  21 S of the semiconductor substrate  21 , the insulating film  31  and the microlens  32  are formed ( FIG. 6A ). 
     Next, as illustrated in  FIG. 18A , the plurality of the hole portions M is formed that extends from the planarization film  33  to reach the pad electrode  12 M. Subsequently, as illustrated in  FIG. 18B , the implanted film  15  is formed to be selectively implanted in the hole portion M. The implanted film  15  is formed, for example, by forming a film of a metal material using a plating method. Thus, the implanted film  15  electrically coupled to the pad electrode  12 M is formed. For example, the implanted film  15  is formed to fill all in the depth direction of the hole portion M. The implanted film  15  may be formed to fill a portion in the depth direction of the hole portion M. 
     After the implanted film  15  is formed, for example, a probe needle is applied to the front surface of the implanted film  15  to perform the inspection in the wafer state. This makes it possible to detect, for example, a malfunction. 
     After the implanted film  15  is formed, the protective member  40  is bonded to the sensor wafer  20 W. The protective member  40  is bonded using the bonding member  34  (see  FIG. 6E ). Here, the hole portion M is filled with the implanted film  15 . Accordingly, the thickness of the bonding member  34  is reduced, as compared to the case where the bonding member  34  is implanted in the hole portion M. 
     After the protective member  40  is bonded to the sensor wafer  20 W, the imaging device  2  can be manufactured in the similar manner to as described in the forgoing first embodiment. 
     In the imaging device  2  according to the present embodiment, the implanted film  15  is implanted in the hole portion M. Accordingly, the thickness of the bonding member  34  is reduced, as compared to the case where the bonding member  34  is implanted in the hole portion M. Hence, it is possible to suppress a decrease in image quality caused by flare, etc. Moreover, in the imaging device  2 , it is possible to fill the hole portion M with the implanted film  15  including a metal material. This makes it easier to maintain strength to form the hole H at the position opposed to the hole portion M. Furthermore, in the case where the inspection is made in the wafer state, a needle is applied to the front surface of the implanted film  15 . Accordingly, the thick implanted film  15  alleviates an impact caused by abutment of the needle, making it possible to suppress deterioration of each part caused by the abutment of the needle. 
     Modification Example 3 
       FIG. 19  schematically illustrates a cross-sectional configuration of a main portion of an imaging device (imaging device  2 A) according to a modification example 4 of the forgoing second embodiment. The imaging device  2 A includes the hole portion M and the cut portion C outside the pixel unit  200 P. The implanted film  35  is implanted in the cut portion C. That is, the imaging device  2 A includes the hole portion M in which the implanted film  15  is implanted, and the cut portion C in which the implanted film  35  is implanted. Except for this point, the imaging device  2 A according to the modification example 3 has a similar configuration to the imaging device  2  of the forgoing second embodiment, and similar workings and effects. 
     The cut portion C is formed, for example, by digging from the planarization film  33  to halfway in the thickness direction of the semiconductor substrate  11  (groove V in  FIG. 20  described later), in the similar manner to as described in the forgoing first embodiment. The cut portion C is provided on the periphery of the imaging device  2 . The cross-sectional shape of the cut portion C is, for example, rectangular ( FIG. 19 ). The cut portion C may have other cross-sectional shapes than rectangular (see  FIGS. 3 and 4 ). The implanted film  35  implanted in the cut portion C includes, for example, an insulating material having low water permeability, similarly to as described in the forgoing first embodiment. 
     Such an imaging device  2 A can be manufactured, for example, as follows ( FIG. 20 ). 
     First, in the similar manner to as described in the forgoing second embodiment, the implanted film  15  and thereunder are formed ( FIG. 18B ). Next, as illustrated in  FIG. 20 , the groove V is formed in the scribe line between the adjacent chip regions A. The groove V is formed, for example, to extend from the front surface of the planarization film  33  through the insulating film  31 , the sensor wafer  20 W, and the multilayered wiring layer  12 , and thereafter, is dug halfway in the thickness direction of the semiconductor substrate  11 . After the groove V is formed, the implanted film  35  is formed (see  FIG. 6C ). 
     After the implanted film  35  is formed, the imaging device  2 A can be manufactured in the similar manner to as described in the forgoing first embodiment. 
     In the imaging device  2 A according to the present modification example, the implanted film  15  is implanted in the hole portion M and the implanted film  35  is implanted in the cut portion C. Accordingly, the thickness of the bonding member  34  is reduced, as compared to the case where the bonding member  34  is implanted in the hole portion M and the cut portion C. 
     Application Example 
     The present technology is not limited to the application to imaging devices, but applicable to electronic apparatuses in general that use imaging devices as image capturing units (photoelectric conversion units). Examples include an imaging device of, for example, a digital still camera and a video camera, a mobile terminal device having an imaging function such as a mobile phone, and a photocopier that uses an imaging device as an image reading unit. It is to be noted that imaging devices sometimes assume a camera module, i.e., a modular form to be mounted on an electronic apparatus. 
       FIG. 21  is a block diagram illustrating a configuration example of an electronic apparatus  2000  as an example of an electronic apparatus of the present disclosure. The electronic apparatus  2000  is, for example, a camera module for a mobile apparatus such as a digital still camera, a video camera, and a mobile phone. As illustrated in  FIG. 21 , the electronic apparatus  2000  of the present disclosure includes, for example, an optical unit including a lens group  2001 , etc., the imaging device  1 ,  1 A,  1 B,  2 , or  2 A (hereinbelow correctively referred to as the imaging device  1 ), a DSP circuit  2003  as a camera signal processor, a frame memory  2004 , a display unit  2005 , a storage unit  2006 , an operation unit  2007 , and a power supply unit  2008 . 
     Moreover, a configuration is provided in which the DSP circuit  2003 , the frame memory  2004 , the display unit  2005 , the storage unit  2006 , the operation unit  2007 , and the power supply unit  2008  are coupled to one another through a bus line  2009 . 
     The lens group  2001  takes in entering light (image light) from a subject and forms am image on an imaging plane of the imaging device  1 . The imaging device  1  converts an amount of light of the entering light with which the lens group  2001  forms the image on the imaging plane, into an electric signal for each pixel. The imaging device  1  outputs the electric signal as a pixel signal. 
     The display unit  2005  includes, for example, a panel display unit such as a liquid crystal display unit or an organic EL (Electro Luminescence) display unit, and displays a moving image or a still image captured by the imaging device  1 . The storage unit  2006  records the moving image or the still image captured by the solid-state imaging element  2002 , in a recording medium such as a DVD (Digital Versatile Disk). 
     The operation unit  2007  gives an operation instruction about various kinds of functions of the imaging device in accordance with an operation by a user. The power supply unit  2008  supplies various kinds of power serving as operation power for the DSP circuit  2003 , the frame memory  2004 , the display unit  2005 , the storage unit  2006 , and the operation unit  2007 , to these targets of supply as appropriate. 
     &lt;Practical Application Examples to In-Vivo Information Acquisition System&gt; 
     Furthermore, the technology according to the present disclosure (the present technology) is applicable to various products. For example, the technology according to the present disclosure may be applied to an endoscopic surgery system. 
       FIG. 22  is a block diagram depicting an example of a schematic configuration of an in-vivo information acquisition system of a patient using a capsule type endoscope, to which the technology according to an embodiment of the present disclosure (present technology) can be applied. 
     The in-vivo information acquisition system  10001  includes a capsule type endoscope  10100  and an external controlling apparatus  10200 . 
     The capsule type endoscope  10100  is swallowed by a patient at the time of inspection. The capsule type endoscope  10100  has an image pickup function and a wireless communication function and successively picks up an image of the inside of an organ such as the stomach or an intestine (hereinafter referred to as in-vivo image) at predetermined intervals while it moves inside of the organ by peristaltic motion for a period of time until it is naturally discharged from the patient. Then, the capsule type endoscope  10100  successively transmits information of the in-vivo image to the external controlling apparatus  10200  outside the body by wireless transmission. 
     The external controlling apparatus  10200  integrally controls operation of the in-vivo information acquisition system  10001 . Further, the external controlling apparatus  10200  receives information of an in-vivo image transmitted thereto from the capsule type endoscope  10100  and generates image data for displaying the in-vivo image on a display apparatus (not depicted) on the basis of the received information of the in-vivo image. 
     In the in-vivo information acquisition system  10001 , an in-vivo image imaged a state of the inside of the body of a patient can be acquired at any time in this manner for a period of time until the capsule type endoscope  10100  is discharged after it is swallowed. 
     A configuration and functions of the capsule type endoscope  10100  and the external controlling apparatus  10200  are described in more detail below. 
     The capsule type endoscope  10100  includes a housing  10101  of the capsule type, in which a light source unit  10111 , an image pickup unit  10112 , an image processing unit  10113 , a wireless communication unit  10114 , a power feeding unit  10115 , a power supply unit  10116  and a control unit  10117  are accommodated. 
     The light source unit  10111  includes a light source such as, for example, a light emitting diode (LED) and irradiates light on an image pickup field-of-view of the image pickup unit  10112 . 
     The image pickup unit  10112  includes an image pickup element and an optical system including a plurality of lenses provided at a preceding stage to the image pickup element. Reflected light (hereinafter referred to as observation light) of light irradiated on a body tissue which is an observation target is condensed by the optical system and introduced into the image pickup element. In the image pickup unit  10112 , the incident observation light is photoelectrically converted by the image pickup element, by which an image signal corresponding to the observation light is generated. The image signal generated by the image pickup unit  10112  is provided to the image processing unit  10113 . 
     The image processing unit  10113  includes a processor such as a central processing unit (CPU) or a graphics processing unit (GPU) and performs various signal processes for an image signal generated by the image pickup unit  10112 . The image processing unit  10113  provides the image signal for which the signal processes have been performed thereby as RAW data to the wireless communication unit  10114 . 
     The wireless communication unit  10114  performs a predetermined process such as a modulation process for the image signal for which the signal processes have been performed by the image processing unit  10113  and transmits the resulting image signal to the external controlling apparatus  10200  through an antenna  10114 A. Further, the wireless communication unit  10114  receives a control signal relating to driving control of the capsule type endoscope  10100  from the external controlling apparatus  10200  through the antenna  10114 A. The wireless communication unit  10114  provides the control signal received from the external controlling apparatus  10200  to the control unit  10117 . 
     The power feeding unit  10115  includes an antenna coil for power reception, a power regeneration circuit for regenerating electric power from current generated in the antenna coil, a voltage booster circuit and so forth. The power feeding unit  10115  generates electric power using the principle of non-contact charging. 
     The power supply unit  10116  includes a secondary battery and stores electric power generated by the power feeding unit  10115 . In  FIG. 22 , in order to avoid complicated illustration, an arrow mark indicative of a supply destination of electric power from the power supply unit  10116  and so forth are omitted. However, electric power stored in the power supply unit  10116  is supplied to and can be used to drive the light source unit  10111 , the image pickup unit  10112 , the image processing unit  10113 , the wireless communication unit  10114  and the control unit  10117 . 
     The control unit  10117  includes a processor such as a CPU and suitably controls driving of the light source unit  10111 , the image pickup unit  10112 , the image processing unit  10113 , the wireless communication unit  10114  and the power feeding unit  10115  in accordance with a control signal transmitted thereto from the external controlling apparatus  10200 . 
     The external controlling apparatus  10200  includes a processor such as a CPU or a GPU, a microcomputer, a control board or the like in which a processor and a storage element such as a memory are mixedly incorporated. The external controlling apparatus  10200  transmits a control signal to the control unit  10117  of the capsule type endoscope  10100  through an antenna  10200 A to control operation of the capsule type endoscope  10100 . In the capsule type endoscope  10100 , an irradiation condition of light upon an observation target of the light source unit  10111  can be changed, for example, in accordance with a control signal from the external controlling apparatus  10200 . Further, an image pickup condition (for example, a frame rate, an exposure value or the like of the image pickup unit  10112 ) can be changed in accordance with a control signal from the external controlling apparatus  10200 . Further, the substance of processing by the image processing unit  10113  or a condition for transmitting an image signal from the wireless communication unit  10114  (for example, a transmission interval, a transmission image number or the like) may be changed in accordance with a control signal from the external controlling apparatus  10200 . 
     Further, the external controlling apparatus  10200  performs various image processes for an image signal transmitted thereto from the capsule type endoscope  10100  to generate image data for displaying a picked up in-vivo image on the display apparatus. As the image processes, various signal processes can be performed such as, for example, a development process (demosaic process), an image quality improving process (bandwidth enhancement process, a super-resolution process, a noise reduction (NR) process and/or image stabilization process) and/or an enlargement process (electronic zooming process). The external controlling apparatus  10200  controls driving of the display apparatus to cause the display apparatus to display a picked up in-vivo image on the basis of generated image data. Alternatively, the external controlling apparatus  10200  may also control a recording apparatus (not depicted) to record generated image data or control a printing apparatus (not depicted) to output generated image data by printing. 
     In the forgoing, an example of the in-vivo information acquisition system is described to which the technology according to the present disclosure is applicable. The technology according to the present disclosure is applicable to, for example, the image pick up unit  10112  out of the configuration described above. This leads to enhancement in detection accuracy. 
     &lt;Practical Application Examples to Endoscopic Surgery System&gt; 
     The technology according to the present disclosure (the present technology) is applicable to various products. For example, the technology according to the present disclosure may be applied to an endoscopic surgery system. 
       FIG. 23  is a view depicting an example of a schematic configuration of an endoscopic surgery system to which the technology according to an embodiment of the present disclosure (present technology) can be applied. 
     In  FIG. 23 , a state is illustrated in which a surgeon (medical doctor)  11131  is using an endoscopic surgery system  11000  to perform surgery for a patient  11132  on a patient bed  11133 . As depicted, the endoscopic surgery system  11000  includes an endoscope  11100 , other surgical tools  11110  such as a pneumoperitoneum tube  11111  and an energy device  11112 , a supporting arm apparatus  11120  which supports the endoscope  11100  thereon, and a cart  11200  on which various apparatus for endoscopic surgery are mounted. 
     The endoscope  11100  includes a lens barrel  11101  having a region of a predetermined length from a distal end thereof to be inserted into a body cavity of the patient  11132 , and a camera head  11102  connected to a proximal end of the lens barrel  11101 . In the example depicted, the endoscope  11100  is depicted which includes as a rigid endoscope having the lens barrel  11101  of the hard type. However, the endoscope  11100  may otherwise be included as a flexible endoscope having the lens barrel  11101  of the flexible type. 
     The lens barrel  11101  has, at a distal end thereof, an opening in which an objective lens is fitted. A light source apparatus  11203  is connected to the endoscope  11100  such that light generated by the light source apparatus  11203  is introduced to a distal end of the lens barrel  11101  by a light guide extending in the inside of the lens barrel  11101  and is irradiated toward an observation target in a body cavity of the patient  11132  through the objective lens. It is to be noted that the endoscope  11100  may be a forward-viewing endoscope or may be an oblique-viewing endoscope or a side-viewing endoscope. 
     An optical system and an image pickup element are provided in the inside of the camera head  11102  such that reflected light (observation light) from the observation target is condensed on the image pickup element by the optical system. The observation light is photo-electrically converted by the image pickup element to generate an electric signal corresponding to the observation light, namely, an image signal corresponding to an observation image. The image signal is transmitted as RAW data to a CCU  11201 . 
     The CCU  11201  includes a central processing unit (CPU), a graphics processing unit (GPU) or the like and integrally controls operation of the endoscope  11100  and a display apparatus  11202 . Further, the CCU  11201  receives an image signal from the camera head  11102  and performs, for the image signal, various image processes for displaying an image based on the image signal such as, for example, a development process (demosaic process). 
     The display apparatus  11202  displays thereon an image based on an image signal, for which the image processes have been performed by the CCU  11201 , under the control of the CCU  11201 . 
     The light source apparatus  11203  includes a light source such as, for example, a light emitting diode (LED) and supplies irradiation light upon imaging of a surgical region to the endoscope  11100 . 
     An inputting apparatus  11204  is an input interface for the endoscopic surgery system  11000 . A user can perform inputting of various kinds of information or instruction inputting to the endoscopic surgery system  11000  through the inputting apparatus  11204 . For example, the user would input an instruction or a like to change an image pickup condition (type of irradiation light, magnification, focal distance or the like) by the endoscope  11100 . 
     A treatment tool controlling apparatus  11205  controls driving of the energy device  11112  for cautery or incision of a tissue, sealing of a blood vessel or the like. A pneumoperitoneum apparatus  11206  feeds gas into a body cavity of the patient  11132  through the pneumoperitoneum tube  11111  to inflate the body cavity in order to secure the field of view of the endoscope  11100  and secure the working space for the surgeon. A recorder  11207  is an apparatus capable of recording various kinds of information relating to surgery. A printer  11208  is an apparatus capable of printing various kinds of information relating to surgery in various forms such as a text, an image or a graph. 
     It is to be noted that the light source apparatus  11203  which supplies irradiation light when a surgical region is to be imaged to the endoscope  11100  may include a white light source which includes, for example, an LED, a laser light source or a combination of them. Where a white light source includes a combination of red, green, and blue (RGB) laser light sources, since the output intensity and the output timing can be controlled with a high degree of accuracy for each color (each wavelength), adjustment of the white balance of a picked up image can be performed by the light source apparatus  11203 . Further, in this case, if laser beams from the respective RGB laser light sources are irradiated time-divisionally on an observation target and driving of the image pickup elements of the camera head  11102  are controlled in synchronism with the irradiation timings. Then images individually corresponding to the R, G and B colors can be also picked up time-divisionally. According to this method, a color image can be obtained even if color filters are not provided for the image pickup element. 
     Further, the light source apparatus  11203  may be controlled such that the intensity of light to be outputted is changed for each predetermined time. By controlling driving of the image pickup element of the camera head  11102  in synchronism with the timing of the change of the intensity of light to acquire images time-divisionally and synthesizing the images, an image of a high dynamic range free from underexposed blocked up shadows and overexposed highlights can be created. 
     Further, the light source apparatus  11203  may be configured to supply light of a predetermined wavelength band ready for special light observation. In special light observation, for example, by utilizing the wavelength dependency of absorption of light in a body tissue to irradiate light of a narrow band in comparison with irradiation light upon ordinary observation (namely, white light), narrow band observation (narrow band imaging) of imaging a predetermined tissue such as a blood vessel of a superficial portion of the mucous membrane or the like in a high contrast is performed. Alternatively, in special light observation, fluorescent observation for obtaining an image from fluorescent light generated by irradiation of excitation light may be performed. In fluorescent observation, it is possible to perform observation of fluorescent light from a body tissue by irradiating excitation light on the body tissue (autofluorescence observation) or to obtain a fluorescent light image by locally injecting a reagent such as indocyanine green (ICG) into a body tissue and irradiating excitation light corresponding to a fluorescent light wavelength of the reagent upon the body tissue. The light source apparatus  11203  can be configured to supply such narrow-band light and/or excitation light suitable for special light observation as described above. 
       FIG. 24  is a block diagram depicting an example of a functional configuration of the camera head  11102  and the CCU  11201  depicted in  FIG. 23 . 
     The camera head  11102  includes a lens unit  11401 , an image pickup unit  11402 , a driving unit  11403 , a communication unit  11404  and a camera head controlling unit  11405 . The CCU  11201  includes a communication unit  11411 , an image processing unit  11412  and a control unit  11413 . The camera head  11102  and the CCU  11201  are connected for communication to each other by a transmission cable  11400 . 
     The lens unit  11401  is an optical system, provided at a connecting location to the lens barrel  11101 . Observation light taken in from a distal end of the lens barrel  11101  is guided to the camera head  11102  and introduced into the lens unit  11401 . The lens unit  11401  includes a combination of a plurality of lenses including a zoom lens and a focusing lens. 
     The number of image pickup elements which is included by the image pickup unit  11402  may be one (single-plate type) or a plural number (multi-plate type). Where the image pickup unit  11402  is configured as that of the multi-plate type, for example, image signals corresponding to respective R, G and B are generated by the image pickup elements, and the image signals may be synthesized to obtain a color image. The image pickup unit  11402  may also be configured so as to have a pair of image pickup elements for acquiring respective image signals for the right eye and the left eye ready for three dimensional (3D) display. If 3D display is performed, then the depth of a living body tissue in a surgical region can be comprehended more accurately by the surgeon  11131 . It is to be noted that, where the image pickup unit  11402  is configured as that of stereoscopic type, a plurality of systems of lens units  11401  are provided corresponding to the individual image pickup elements. 
     Further, the image pickup unit  11402  may not necessarily be provided on the camera head  11102 . For example, the image pickup unit  11402  may be provided immediately behind the objective lens in the inside of the lens barrel  11101 . 
     The driving unit  11403  includes an actuator and moves the zoom lens and the focusing lens of the lens unit  11401  by a predetermined distance along an optical axis under the control of the camera head controlling unit  11405 . Consequently, the magnification and the focal point of a picked up image by the image pickup unit  11402  can be adjusted suitably. 
     The communication unit  11404  includes a communication apparatus for transmitting and receiving various kinds of information to and from the CCU  11201 . The communication unit  11404  transmits an image signal acquired from the image pickup unit  11402  as RAW data to the CCU  11201  through the transmission cable  11400 . 
     In addition, the communication unit  11404  receives a control signal for controlling driving of the camera head  11102  from the CCU  11201  and supplies the control signal to the camera head controlling unit  11405 . The control signal includes information relating to image pickup conditions such as, for example, information that a frame rate of a picked up image is designated, information that an exposure value upon image picking up is designated and/or information that a magnification and a focal point of a picked up image are designated. 
     It is to be noted that the image pickup conditions such as the frame rate, exposure value, magnification or focal point may be designated by the user or may be set automatically by the control unit  11413  of the CCU  11201  on the basis of an acquired image signal. In the latter case, an auto exposure (AE) function, an auto focus (AF) function and an auto white balance (AWB) function are incorporated in the endoscope  11100 . 
     The camera head controlling unit  11405  controls driving of the camera head  11102  on the basis of a control signal from the CCU  11201  received through the communication unit  11404 . 
     The communication unit  11411  includes a communication apparatus for transmitting and receiving various kinds of information to and from the camera head  11102 . The communication unit  11411  receives an image signal transmitted thereto from the camera head  11102  through the transmission cable  11400 . 
     Further, the communication unit  11411  transmits a control signal for controlling driving of the camera head  11102  to the camera head  11102 . The image signal and the control signal can be transmitted by electrical communication, optical communication or the like. 
     The image processing unit  11412  performs various image processes for an image signal in the form of RAW data transmitted thereto from the camera head  11102 . 
     The control unit  11413  performs various kinds of control relating to image picking up of a surgical region or the like by the endoscope  11100  and display of a picked up image obtained by image picking up of the surgical region or the like. For example, the control unit  11413  creates a control signal for controlling driving of the camera head  11102 . 
     Further, the control unit  11413  controls, on the basis of an image signal for which image processes have been performed by the image processing unit  11412 , the display apparatus  11202  to display a picked up image in which the surgical region or the like is imaged. Thereupon, the control unit  11413  may recognize various objects in the picked up image using various image recognition technologies. For example, the control unit  11413  can recognize a surgical tool such as forceps, a particular living body region, bleeding, mist when the energy device  11112  is used and so forth by detecting the shape, color and so forth of edges of objects included in a picked up image. The control unit  11413  may cause, when it controls the display apparatus  11202  to display a picked up image, various kinds of surgery supporting information to be displayed in an overlapping manner with an image of the surgical region using a result of the recognition. Where surgery supporting information is displayed in an overlapping manner and presented to the surgeon  11131 , the burden on the surgeon  11131  can be reduced and the surgeon  11131  can proceed with the surgery with certainty. 
     The transmission cable  11400  which connects the camera head  11102  and the CCU  11201  to each other is an electric signal cable ready for communication of an electric signal, an optical fiber ready for optical communication or a composite cable ready for both of electrical and optical communications. 
     Here, while, in the example depicted, communication is performed by wired communication using the transmission cable  11400 , the communication between the camera head  11102  and the CCU  11201  may be performed by wireless communication. 
     In the forgoing, an example of the endoscopic surgery system is described to which the technology according to the present disclosure is applicable. The technology according to the present disclosure is applicable to, for example, the image pick up unit  11402  out of the configuration described above. Applying the technology according to the present disclosure to the image pick up unit  11402  leads to enhancement in detection accuracy. 
     It is to be noted that the endoscopic surgery system is described here as an example, but the technology according to the present disclosure may be applied to other systems, for example, a micrographic surgery system, etc. 
     &lt;Practical Application Examples to Mobile Body&gt; 
     The technology according to the present disclosure is applicable to various products. For example, the technology according to the present disclosure may be achieved as a device to be installed in any kind of a mobile body such as an automobile, an electric vehicle, a hybrid electric vehicle, a motorcycle, a bicycle, a personal mobility, an aircraft, a drone, a vessel, a robot, construction machinery, and agricultural machinery (tractor). 
       FIG. 25  is a block diagram depicting an example of schematic configuration of a vehicle control system as an example of a mobile body control system to which the technology according to an embodiment of the present disclosure can be applied. 
     The vehicle control system  12000  includes a plurality of electronic control units connected to each other via a communication network  12001 . In the example depicted in  FIG. 25 , the vehicle control system  12000  includes a driving system control unit  12010 , a body system control unit  12020 , an outside-vehicle information detecting unit  12030 , an in-vehicle information detecting unit  12040 , and an integrated control unit  12050 . In addition, a microcomputer  12051 , a sound/image output section  12052 , and a vehicle-mounted network interface (I/F)  12053  are illustrated as a functional configuration of the integrated control unit  12050 . 
     The driving system control unit  12010  controls the operation of devices related to the driving system of the vehicle in accordance with various kinds of programs. For example, the driving system control unit  12010  functions as a control device for a driving force generating device for generating the driving force of the vehicle, such as an internal combustion engine, a driving motor, or the like, a driving force transmitting mechanism for transmitting the driving force to wheels, a steering mechanism for adjusting the steering angle of the vehicle, a braking device for generating the braking force of the vehicle, and the like. 
     The body system control unit  12020  controls the operation of various kinds of devices provided to a vehicle body in accordance with various kinds of programs. For example, the body system control unit  12020  functions as a control device for a keyless entry system, a smart key system, a power window device, or various kinds of lamps such as a headlamp, a backup lamp, a brake lamp, a turn signal, a fog lamp, or the like. In this case, radio waves transmitted from a mobile device as an alternative to a key or signals of various kinds of switches can be input to the body system control unit  12020 . The body system control unit  12020  receives these input radio waves or signals, and controls a door lock device, the power window device, the lamps, or the like of the vehicle. 
     The outside-vehicle information detecting unit  12030  detects information about the outside of the vehicle including the vehicle control system  12000 . For example, the outside-vehicle information detecting unit  12030  is connected with an imaging section  12031 . The outside-vehicle information detecting unit  12030  makes the imaging section  12031  image an image of the outside of the vehicle, and receives the imaged image. On the basis of the received image, the outside-vehicle information detecting unit  12030  may perform processing of detecting an object such as a human, a vehicle, an obstacle, a sign, a character on a road surface, or the like, or processing of detecting a distance thereto. 
     The imaging section  12031  is an optical sensor that receives light, and which outputs an electric signal corresponding to a received light amount of the light. The imaging section  12031  can output the electric signal as an image, or can output the electric signal as information about a measured distance. In addition, the light received by the imaging section  12031  may be visible light, or may be invisible light such as infrared rays or the like. 
     The in-vehicle information detecting unit  12040  detects information about the inside of the vehicle. The in-vehicle information detecting unit  12040  is, for example, connected with a driver state detecting section  12041  that detects the state of a driver. The driver state detecting section  12041 , for example, includes a camera that images the driver. On the basis of detection information input from the driver state detecting section  12041 , the in-vehicle information detecting unit  12040  may calculate a degree of fatigue of the driver or a degree of concentration of the driver, or may determine whether the driver is dozing. 
     The microcomputer  12051  can calculate a control target value for the driving force generating device, the steering mechanism, or the braking device on the basis of the information about the inside or outside of the vehicle which information is obtained by the outside-vehicle information detecting unit  12030  or the in-vehicle information detecting unit  12040 , and output a control command to the driving system control unit  12010 . For example, the microcomputer  12051  can perform cooperative control intended to implement functions of an advanced driver assistance system (ADAS) which functions include collision avoidance or shock mitigation for the vehicle, following driving based on a following distance, vehicle speed maintaining driving, a warning of collision of the vehicle, a warning of deviation of the vehicle from a lane, or the like. 
     In addition, the microcomputer  12051  can perform cooperative control intended for automatic driving, which makes the vehicle to travel autonomously without depending on the operation of the driver, or the like, by controlling the driving force generating device, the steering mechanism, the braking device, or the like on the basis of the information about the outside or inside of the vehicle which information is obtained by the outside-vehicle information detecting unit  12030  or the in-vehicle information detecting unit  12040 . 
     In addition, the microcomputer  12051  can output a control command to the body system control unit  12020  on the basis of the information about the outside of the vehicle which information is obtained by the outside-vehicle information detecting unit  12030 . For example, the microcomputer  12051  can perform cooperative control intended to prevent a glare by controlling the headlamp so as to change from a high beam to a low beam, for example, in accordance with the position of a preceding vehicle or an oncoming vehicle detected by the outside-vehicle information detecting unit  12030 . 
     The sound/image output section  12052  transmits an output signal of at least one of a sound and an image to an output device capable of visually or auditorily notifying information to an occupant of the vehicle or the outside of the vehicle. In the example of  FIG. 25 , an audio speaker  12061 , a display section  12062 , and an instrument panel  12063  are illustrated as the output device. The display section  12062  may, for example, include at least one of an on-board display and a head-up display. 
       FIG. 26  is a diagram depicting an example of the installation position of the imaging section  12031 . 
     In  FIG. 26 , the imaging section  12031  includes imaging sections  12101 ,  12102 ,  12103 ,  12104 , and  12105 . 
     The imaging sections  12101 ,  12102 ,  12103 ,  12104 , and  12105  are, for example, disposed at positions on a front nose, sideview mirrors, a rear bumper, and a back door of the vehicle  12100  as well as a position on an upper portion of a windshield within the interior of the vehicle. The imaging section  12101  provided to the front nose and the imaging section  12105  provided to the upper portion of the windshield within the interior of the vehicle obtain mainly an image of the front of the vehicle  12100 . The imaging sections  12102  and  12103  provided to the sideview mirrors obtain mainly an image of the sides of the vehicle  12100 . The imaging section  12104  provided to the rear bumper or the back door obtains mainly an image of the rear of the vehicle  12100 . The imaging section  12105  provided to the upper portion of the windshield within the interior of the vehicle is used mainly to detect a preceding vehicle, a pedestrian, an obstacle, a signal, a traffic sign, a lane, or the like. 
     Incidentally,  FIG. 26  depicts an example of photographing ranges of the imaging sections  12101  to  12104 . An imaging range  12111  represents the imaging range of the imaging section  12101  provided to the front nose. Imaging ranges  12112  and  12113  respectively represent the imaging ranges of the imaging sections  12102  and  12103  provided to the sideview mirrors. An imaging range  12114  represents the imaging range of the imaging section  12104  provided to the rear bumper or the back door. A bird&#39;s-eye image of the vehicle  12100  as viewed from above is obtained by superimposing image data imaged by the imaging sections  12101  to  12104 , for example. 
     At least one of the imaging sections  12101  to  12104  may have a function of obtaining distance information. For example, at least one of the imaging sections  12101  to  12104  may be a stereo camera constituted of a plurality of imaging elements, or may be an imaging element having pixels for phase difference detection. 
     For example, the microcomputer  12051  can determine a distance to each three-dimensional object within the imaging ranges  12111  to  12114  and a temporal change in the distance (relative speed with respect to the vehicle  12100 ) on the basis of the distance information obtained from the imaging sections  12101  to  12104 , and thereby extract, as a preceding vehicle, a nearest three-dimensional object in particular that is present on a traveling path of the vehicle  12100  and which travels in substantially the same direction as the vehicle  12100  at a predetermined speed (for example, equal to or more than 0 km/hour). Further, the microcomputer  12051  can set a following distance to be maintained in front of a preceding vehicle in advance, and perform automatic brake control (including following stop control), automatic acceleration control (including following start control), or the like. It is thus possible to perform cooperative control intended for automatic driving that makes the vehicle travel autonomously without depending on the operation of the driver or the like. 
     For example, the microcomputer  12051  can classify three-dimensional object data on three-dimensional objects into three-dimensional object data of a two-wheeled vehicle, a standard-sized vehicle, a large-sized vehicle, a pedestrian, a utility pole, and other three-dimensional objects on the basis of the distance information obtained from the imaging sections  12101  to  12104 , extract the classified three-dimensional object data, and use the extracted three-dimensional object data for automatic avoidance of an obstacle. For example, the microcomputer  12051  identifies obstacles around the vehicle  12100  as obstacles that the driver of the vehicle  12100  can recognize visually and obstacles that are difficult for the driver of the vehicle  12100  to recognize visually. Then, the microcomputer  12051  determines a collision risk indicating a risk of collision with each obstacle. In a situation in which the collision risk is equal to or higher than a set value and there is thus a possibility of collision, the microcomputer  12051  outputs a warning to the driver via the audio speaker  12061  or the display section  12062 , and performs forced deceleration or avoidance steering via the driving system control unit  12010 . The microcomputer  12051  can thereby assist in driving to avoid collision. 
     At least one of the imaging sections  12101  to  12104  may be an infrared camera that detects infrared rays. The microcomputer  12051  can, for example, recognize a pedestrian by determining whether or not there is a pedestrian in imaged images of the imaging sections  12101  to  12104 . Such recognition of a pedestrian is, for example, performed by a procedure of extracting characteristic points in the imaged images of the imaging sections  12101  to  12104  as infrared cameras and a procedure of determining whether or not it is the pedestrian by performing pattern matching processing on a series of characteristic points representing the contour of the object. When the microcomputer  12051  determines that there is a pedestrian in the imaged images of the imaging sections  12101  to  12104 , and thus recognizes the pedestrian, the sound/image output section  12052  controls the display section  12062  so that a square contour line for emphasis is displayed so as to be superimposed on the recognized pedestrian. The sound/image output section  12052  may also control the display section  12062  so that an icon or the like representing the pedestrian is displayed at a desired position. 
     In the forgoing, an example of the vehicle control system is described to which the technology according to the present disclosure is applicable. The technology according to the present disclosure is applicable to the imaging section  12031  out of the configuration described above. Applying the technology according to the present disclosure to the imaging section  12031  makes it possible to obtain images that are easier to see. Hence, it is possible to alleviate a driver&#39;s fatigue. 
     Although contents of the present disclosure have been described above with reference to the embodiments and the modification examples, the contents of the present disclosure are not limited to the forgoing embodiments and the like described above, but may be modified in a variety of ways. For example, the configuration of the imaging device described in the forgoing embodiments and the like is merely illustrative, and may further include other layers. Moreover, a material and a thickness of each layer are also illustrative, and not limited to those described above. 
     Moreover, in the forgoing first embodiment, the case is described in which the cut portion C is provided from the planarization film  33  to the semiconductor substrate  11 . However, it suffices that the cut portion C is provided at least in a thickness direction of the insulating film  31 . For example, the cut portion C may be provided in the thickness direction of the planarization film  33  and the insulating film  31 , causing the light input surface  21 S of the semiconductor substrate  21  to be exposed in the bottom surface of the cut portion C. Alternatively, the cut portion C may be provided from the planarization film  33  to the semiconductor substrate  21 , causing the bottom surface of the cut portion C to be provided inside the semiconductor substrate  21 . 
     Moreover, in the forgoing first embodiment, the case is described in which the cut portion C is provided for suppression of intrusion of moisture through the chip end face. In the forgoing second embodiment, the case is described in which the hole portion M is provided for the inspection in the wafer state. However, the functions of the cut portion and the hole portion of the present disclosure are not limited thereto. The shapes and the arrangements of the cut portion and the hole portion of the present disclosure are not limited to those described in the forgoing embodiments and the like. 
     Furthermore, in the forgoing embodiments and the like, the case is described in which the rewiring  51  is provided in the hole H of the semiconductor substrate  11  (for example,  FIG. 2 ). However, the hole H may be filled with an electrically conductive body separate from the rewiring  51 . The electrically conductive body may be coupled to the rewiring  51 . 
     In addition, in the forgoing embodiments and the like, the example is described in which the imaging device  1  includes two stacked chips (the logic chip  10  and the sensor chip  20 ) (for example,  FIG. 2 ). Besides, the imaging device  1  may include three or more stacked chips. 
     The effects described in the forgoing embodiments and the like are merely illustrative. The technology according to the present disclosure may produce other effects, or further include other effects. 
     It is to be noted that the present disclosure may have the following configurations. According to the imaging device having the following configurations, the implanted film is implanted in a portion or all in the depth direction of the cut portion and the hole portion. The implanted film includes the different material from the material of the bonding member. This makes it possible to reduce the thickness of the bonding member between the protective member and the insulating film, as compared to a case where the cut portion or the hole portion is filled with the use of the bonding member. Hence, it is possible to reduce expansion of light reflected from between the semiconductor substrate and the protective member. This leads to suppression of a decrease in image quality caused by flare, etc. 
     (1) 
     An imaging device including: 
     a first semiconductor substrate including a light input surface and provided with a photoelectric conversion section; 
     a second semiconductor substrate provided on opposite side of the first semiconductor substrate to the light input surface; 
     an insulating film provided on side of the first semiconductor substrate on which the light input surface is disposed; 
     a cut portion, a hole portion, or both that extend at least in a thickness direction of the insulating film; 
     an implanted film implanted in a portion or all in a depth direction of the cut portion, the hole portion, or both; 
     a protective member opposed to the first semiconductor substrate with the insulating film in between; and 
     a bonding member including a different material from a material of the implanted film and provided between the protective member and the insulating film. 
     (2) 
     The imaging device according to (1) described above, in which the cut portion is provided on a periphery of the insulating film and extends through the insulating film and the first semiconductor substrate. 
     (3) 
     The imaging device according to (2) described above, in which the implanted film includes an insulating material. 
     (4) 
     The imaging device according to any one of (1) to (3) described above, further including: 
     a lens opposed to the photoelectric conversion section with the insulating film in between; and 
     a planarization film that covers the lens and includes a same material as a material of the implanted film. 
     (5) 
     The imaging device according to (4) described above, in which a refractive index of the material of the planarization film and the implanted film is lower than a refractive index of a material of the lens. 
     (6) 
     The imaging device according to any one of (1) to (5) described above, further including a pad electrode provided between the first semiconductor substrate and the second semiconductor substrate, in which 
     the hole portion extends through the insulating film and the first semiconductor substrate and reaches the pad electrode. 
     (7) 
     The imaging device according to (6) described above, in which the implanted film includes an electrically conductive material. 
     (8) 
     The imaging device according to (6) or (7) described above, in which the implanted film includes a metal material. 
     (9) 
     The imaging device according to any one of (6) to (8) described above, further including a multilayered wiring layer in which the pad electrode is provided. 
     (10) 
     The imaging device according to (9) described above, further including an external coupling terminal electrically coupled to the pad electrode and provided on an opposite surface of the second semiconductor substrate to the multilayered wiring layer. 
     (11) 
     The imaging device according to any one of (1) to (10) described above, in which the implanted film is implanted in all in the depth direction of the cut portion, the hole portion, or both. 
     (12) 
     The imaging device according to any one of (1) to (10) described above, in which the implanted film is implanted in a portion in the depth direction of the cut portion, the hole portion, or both. 
     (13) 
     The imaging device according to any one of (1) to (12) described above, in which the cut portion and the hole portion are provided, and the implanted film is implanted in the cut portion and the hole portion. 
     (14) 
     The imaging device according to any one of (1) to (13) described above, in which the cut portion, the hole portion, or both have a width that is gradually reduced in the depth direction. 
     (15) 
     The imaging device according to any one of (1) to (14) described above, in which the cut portion, the hole portion, or both have a width that is stepwise reduced in the depth direction. 
     This application claims the benefit of Japanese Patent Application No. 2019-104223 filed with the Japan Patent Office on Jun. 4, 2019, the entire contents of which are incorporated herein by reference. 
     It should be understood by those skilled in the art that various modifications, combinations, sub-combinations, and alterations may occur depending on design requirements and other factors insofar as they are within the scope of the appended claims or the equivalents thereof.