Patent Publication Number: US-11387189-B2

Title: Image pickup apparatus and camera module

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 15/645,572 filed Jul. 10, 2017 which is a continuation of U.S. application Ser. No. 15/138,887, filed Apr. 26, 2016 now U.S. Pat. No. 9,735,115, which is a continuation of U.S. application Ser. No. 13/566,401, filed Aug. 3, 2012, now U.S. Pat. No. 9,343,597, which claims the benefit of priority under 35 U.S.C. § 119 of Japanese Application No. 2011-176125, filed Aug. 11, 2011, the entire disclosures of which are hereby incorporated herein by reference. 
    
    
     BACKGROUND 
     The present disclosure relates to an image pickup apparatus and a camera module in which an optical sensor such as a CCD (charge coupled device) and a CMOS (complementary metal oxide semiconductor) image sensor (CIS) is configured as a chip scale package. 
     As a simple package method for an optical sensor, a wafer chip scale package (WCSP) structure has been proposed. 
       FIG. 1  is a view showing a basic structure of a WCSP structure. 
     In a WCSP structure  1 , disposed is a sealing glass (cover glass)  3  as a sealing material for protecting an upper portion of an optical element area  21  serving as a light receiving unit of a front surface of an optical device  2  serving as an optical sensor (sensor chip). 
     In the WCSP structure  1 , the sealing glass  3  is disposed on a peripheral portion excluding the optical element area (light receiving unit)  21  of the optical device  2  with a resin  4  intervened. Therefore, in the WCSP structure  1 , between the light receiving unit  21  of the optical device  2  and an opposed surface  31  of the sealing glass  3  with respect to the optical element area (light receiving unit)  21 , a cavity  5  is formed. 
     In the CSP structure, an electrode  6  is formed with a through silicon via (TSV) that penetrates the sensor chip from the front surface to the back surface thereof, thereby eliminating wirings using wire bond, which makes it possible to bond the glass in a clean room in a wafer state. 
     As a result, it is possible to attain a size reduction, a cost reduction, and a dustless condition as compared to a COB (Chip On Board) type package of a past technique. 
       FIG. 2  is a view showing another structure of a WCSP structure. 
     A WCSP structure  1 A shown in  FIG. 2  is configured as a WCSP structure with no cavity because the cavity  5  in the WCSP structure  1  shown in  FIG. 1  is filled with the resin  4 . 
     In the following description, the WCSP structure with no cavity is referred to as a cavityless WCSP structure in some cases. 
     By employing the cavityless CSP structure with no cavity, a thermal stress generated in the cavity of the WCSP structure having a cavity can be significantly reduced, which can suppress an occurrence of warp. 
     Further, the cavityless CSP structure can suppress a reflection caused on an interface of the cavity (refractive index: 1) optically with the resin having the refractive index of approximately 1.5, with the result that it is possible to attain an increase of a light receiving quantity in the optical device  2 . 
     Incidentally, in a lens-integrated camera module with a WCSP of a CCD or a CMOS image sensor, it is necessary to provide a function of an electromagnetic susceptibility (EMS) or an electromagnetic compatibility (EMC). 
     The EMS is a function for preventing a radiation electromagnetic field from another apparatus near the camera module and natural phenomena such as thunder and solar activity from inhibiting an operation of an electronic apparatus and for a protection from an external factor that causes a functional degradation of a system, a malfunction, and the like. 
     The EMC is a function for preventing the camera module itself from inhibiting an operation of another apparatus and preventing an electromagnetic interference (EMI) which may be an interference source at a certain level or more that affects a human body. 
     Image pickup apparatuses and camera modules which are equipped with the EMS or the EMC have been proposed (see, for example, Japanese Patent Application Laid-open Nos. 2010-283597, 2009-158863, and 2010-11230 (hereinafter, referred to as Patent Document 1, Patent Document 2, and Patent Document 3, respectively)). 
     The image pickup apparatus disclosed in Patent Document 1 includes a pixel area and has an image pickup element chip, in which a well is formed on a periphery thereof, and a metal shield which is disposed on the image pickup element chip and electrically connected with the well of the image pickup element chip. 
     In the camera module disclosed in Patent Document 2, around an optical device and shield glass, a light and electromagnetic shield is disposed. 
     The camera module disclosed in Patent Document 3 has a metal evaporation film that covers an entire side surface of the camera module. 
     SUMMARY 
     However, although the demand for a size reduction of an electronic apparatus is increased year by year, such a structure that a metal shield is attached to the outside of the camera module as disclosed in Patent Documents 1 and 2 makes the module large and makes a manufacturing process complicated, which increases a material cost. 
     Further, in the structure disclosed in Patent Document 3, the metal evaporation film that covers the lens-integrated camera module is electrically floated, which degrades the EMC effect. 
     In view of the above-mentioned circumstances, it is desirable to provide an image pickup apparatus and a camera module which can sufficiently exert the EMC or EMI effect while preventing the increase in size of the module, the complication of the process, and the increase in cost. 
     According to an embodiment of the present disclosure, there is provided an image pickup apparatus including an optical device in which an optical element area for receiving light is formed on a side of a first surface of a substrate, and an external connection terminal is formed on a side of a second surface opposite to the first surface of the substrate, a transparent conductive film formed to face the first surface of the substrate, an electrode pad formed on the first surface of the substrate and configured to perform connection with a fixed potential, and a penetrating electrode connected to the electrode pad and formed to penetrate the substrate between the first surface and second surface, in which the transparent conductive film is connected to the electrode pad, and the penetrating electrode is connected to the external connection terminal on the side of the second surface of the substrate. 
     According to another embodiment of the present disclosure, there is provided a camera module including an image pickup apparatus including an optical element area for receiving light, and a lens configured to form a subject image on the optical element area of the image pickup apparatus, in which the image pickup apparatus includes an optical device in which an optical element area for receiving light is formed on a side of a first surface of a substrate, and an external connection terminal is formed on a side of a second surface opposite to the first surface of the substrate, a transparent conductive film formed to face the first surface of the substrate, an electrode pad formed on the first surface of the substrate and configured to perform connection with a fixed potential, and a penetrating electrode connected to the electrode pad and formed to penetrate the substrate between the first surface and second surface, the transparent conductive film is connected to the electrode pad, and the penetrating electrode is connected to the external connection terminal on the side of the second surface of the substrate. 
     According to the embodiments of the present disclosure, it is possible to sufficiently exert an EMC or EMI effect while preventing an increase in size of the module, a complication of the process, and an increase in cost. 
     These and other objects, features and advantages of the present disclosure will become more apparent in light of the following detailed description of best mode embodiments thereof, as illustrated in the accompanying drawings. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a view showing a basic structure of a WCSP structure; 
         FIG. 2  is a view showing the structure of a WCSP structure with no cavity; 
         FIGS. 3A and 3B  are views each showing a first structural example of an image pickup apparatus according to a first embodiment; 
         FIG. 4  is a view showing a structural example of a color filter according to the first embodiment; 
         FIGS. 5A and 5B  are views each showing a second structural example of an image pickup apparatus according to a second embodiment; 
         FIGS. 6A and 68  are views each showing a third structural example of an image pickup apparatus according to a third embodiment; 
         FIGS. 7A and 7B  are views each showing a fourth structural example of an image pickup apparatus according to a fourth embodiment; 
         FIGS. 8A and 88  are views each showing a fifth structural example of an image pickup apparatus according to a fifth embodiment; and 
         FIG. 9  is a view showing a structural example of a camera module according to a sixth embodiment. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENTS 
     Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. 
     It should be noted that the description will be given in the following order.
         1. First structural example of image pickup apparatus   2. Second structural example of image pickup apparatus   3. Third structural example of image pickup apparatus   4. Fourth structural example of image pickup apparatus   5. Fifth structural example of image pickup apparatus   6. Structural example of camera module
 
&lt;1. First Structural Example of Image Pickup Apparatus&gt;
       

       FIGS. 3A and 3B  are views each showing a first structural example of an image pickup apparatus according to a first embodiment. 
       FIG. 3A  is a plan view showing the structural example in which a transparent conductive film is disposed on a first surface side of a substrate, and  FIG. 3B  is a schematic side view showing the entire structure of the image pickup apparatus. 
     In this embodiment, as an optical device (optical sensor), a CMOS image sensor (CIS) is applied as an example. 
     An image pickup apparatus  100  according to this embodiment basically has a WCSP structure which performs packaging with an optical sensor chip size. 
     The image pickup apparatus  100  is capable of employing either a cavity structure in which a cavity is formed between an optical element area (light receiving unit) of the optical device and an opposed surface of sealing glass with respect to the light receiving unit or a cavityless WCSP structure with no cavity. 
     In this embodiment, the first surface (front surface) means an incident side of image light of a subject, on which the light receiving unit of the optical device as the optical sensor of the image pickup apparatus is formed, and a second surface (back surface) means a side opposite to the first side. On the second surface, light is not incident, and a connection electrode such as a bump, an interposer, and the like are disposed. 
     The image pickup apparatus  100  has an optical device  110 , a sealing material  120 , a transparent conductive film  130  serving as an intermediate layer, electrode pads  140  (−1 to −4), another connection pad  150  serving as an external connection terminal, penetrating electrodes  160  (−1, −2), and an external connection terminal  170 . 
     In this embodiment, the electrode pad  140  is a pad for a ground terminal for connecting to a fixed potential (ground potential in this example). 
     In this embodiment, as will be described later, the transparent conductive film  130  is connected to the electrode pad  140  and connected to the external connection terminal  170  through the penetrating electrode  160  connected to the electrode pad, and the external connection terminal  170  is connected to an external reference potential (ground potential). 
     With this structure, the transparent conductive film  130  also functions as a shield material in addition to the function of a protection film of the optical element area. 
     It should be noted that the transparent conductive film  130  and the sealing material  120  are formed of a transparent material with respect to light, which causes light to pass therethrough, and those materials each have a refractive index higher than the refractive index of air. For example, the sealing material  120  is formed of a material having a refractive index of approximately 1.5. 
     Further, in the structure shown in  FIG. 3 , the sealing material  120  is made of glass as an example, and the sealing material  120  refers to a sealing glass or a cover glass in some cases. 
     In the optical device  110 , an optical element area  112  functioning as the light receiving unit is formed on the side of a first surface (front surface)  111   a  of a sensor substrate  111 , and the external connection terminal  170  serving as an electrode for connection with the outside, such as a bump, is formed on the side of a second surface (back surface)  111   b.    
     In the optical device  110 , on a side portion (on the right and left side portions in  FIG. 3 ) on the first surface  111   a  side of the sensor substrate  111 , the electrode pads  140  (−1 to −4) and the connection pad  150  in addition thereto are formed. 
     In the optical device  110 , in an area excluding a filter part of the optical element area  112  on the first surface  111   a  of the sensor substrate  111 , an insulation film  113  is formed. 
     On the side of the first surface  111   a  of the sensor substrate  111 , the electrode pads  140  are formed so as to be opened and exposed in such a manner that the electrode pads  140  are buried in the insulation film  113  to be electrically connected to the transparent conductive film  130 . 
     The connection pad  150  serving as the external connection terminal formed on the first surface  111   a  of the sensor substrate  111  of the optical device  110  may be opened or may not be opened as a wire bonding pad. Further, the pad may not be a metal layer on an uppermost layer of stacked wirings in the optical device  110 . 
     It should be noted that the “opened” refers to a directly connectable state in which the insulation film  113  is removed to expose the pad. 
     In the optical device  110 , the penetrating electrodes  160  (−1, −2) are formed by through silicon vias (TSV)  114  that penetrate the sensor substrate  111  between the first surface  111   a  and the second surface  111   b . With this structure, the wirings using the wire bonding are eliminated, and the glass can be bonded in a wafer state in a clean room. 
     The penetrating electrodes  160  (−1 to −4) are connected to the external connection terminal  170  connected to the external reference potential (ground potential) by a wiring  115  on the side of the second surface  111   b  of the sensor substrate  111 . 
     The optical element area  112  serving as the light receiving unit is formed on the first surface  111   a  of the sensor substrate  111  and has a light receiving surface (pixel array unit)  1121  on which a plurality of pixels (light receiving elements) are arranged in a matrix pattern. 
     In the optical element area  112 , on the front surface side of the pixel array unit  1121 , a color filter  1122  is formed. 
     In the color filter  1122 , color filters of three primary colors of R (red), G, (green), and B (blue) are formed in an array manner as on-chip color filters (OCCF) in the Bayer arrangement as shown in  FIG. 4 , for example. However, the arrangement pattern of the color filters is not limited to the Bayer arrangement. 
     It should be noted that, in the example of  FIG. 4 , an infrared cutoff filter (IRCF)  180  is formed so as to be overlapped with the color filter  1122 . 
     In the optical element area  112 , a micro lens array  1123  for collecting incident light to pixels is arranged on the front surface side of the color filter  1122 . 
     In the optical element area  112 , on the front surface side of the micro lens array  1123 , an antireflection film or the like is formed, for example. 
     The transparent conductive film  130  is formed so as to fill a gap between the first surface  111   a  of the sensor substrate  111  on which the optical element area  112  having the structure mentioned above is formed and an opposed surface  121  of the sealing material (sealing glass)  120  with respect to the first surface  111   a.    
     That is, the image pickup apparatus  100  according to the first embodiment is formed as so-called a cavityless structure. 
     It should be noted that the thickness of the transparent conductive film  130  is set to approximately 50 μm, for example. Further, the thickness of the sealing glass  120  is set to approximately 450 to 500 μm, for example. 
     The transparent conductive film  130  is formed of a transparent organic film or the like, in which conductive particles such as an ITO (Indium Tin Oxide) and ZnO2 (Zinc peroxide) are dispersed. 
     The transparent conductive film  130  is subjected to patterning into a shape as shown in  FIG. 3A  in the case where the connection pad  150  serving as the external connection terminal formed on the first surface  111   a  of the sensor substrate  111  of the optical device  110  is opened as the wire bonding pad. 
     That is, the transparent conductive film  130  is subjected to the patterning so as to have cutoff portions  131 - 1  and  131 - 2  obtained by removing parts of the transparent conductive film  130  so that the wire bonding pad is not electrically connected to (not brought into contact with) the transparent conductive film. 
     Further, in the first embodiment, the transparent conductive film  130  is formed so as to cover the optical element area  112 , and a part thereof that is electrically connected with the optical device  110  and exerts an influence is formed so as to be non-contact electrically. 
     The insulation film  113  is formed in an area excluding the optical element area  112  in the first surface  111   a  of the sensor substrate  111  so as to be non-contact with the transparent conductive film  130  on the side of the optical device  110 . Alternatively, the transparent conductive film  130  is subjected to the patterning so as to avoid the part that is electrically connected and exerts the influence in the optical device  110 . 
     The image pickup apparatus  100  having the structure described above is manufactured basically as follows. 
     In the optical device  110 , the transparent conductive film  130  is bonded with the glass  120  having the same size as the optical device  110  with an optically transparent adhesive at a wafer level. 
     After that, silicon on a second surface side, which is opposite to the first surface on which the optical element area  112  of the optical device  110  is formed, is cut away up to such a thickness that the penetrating electrode  160  can be formed. 
     Then, the through silicon via  114  for forming the penetrating electrode  160 , which is connected with the external connection terminal  170  is formed, the insulation film  113  is formed, the re-wiring  115  is formed, and a protection film  116  is formed. Then, the matter thus obtained is divided into pieces of the size of each optical device  110 , with the result that the WCSP of the optical device is completed. 
     In the image pickup apparatus  100  according to this embodiment, the transparent conductive film  130  is connected with the electrode pad  140  and is connected with the external connection terminal  170  through the penetrating electrode  160  connected to the electrode pad  140 , and the external connection terminal  170  is connected with an external reference potential (ground potential). 
     With this structure, the transparent conductive film  130  functions as the shield material in addition to the function of the protection film of the optical element area, and the optical device  110  is covered with an EMC (Electro-Magnetic Compatibility) shield. 
     &lt;2. Second Structural Example of Image Pickup Apparatus&gt; 
       FIGS. 5A and 5B  are views each showing a second structural example of an image pickup apparatus according to a second embodiment. 
       FIG. 5A  is a plan view showing a structural example in which a transparent conductive film is disposed on a first surface side of a substrate, and  FIG. 5B  is a schematic side view showing an entire structure of the image pickup apparatus. 
     An image pickup apparatus  100 A according to the second embodiment is different from the image pickup apparatus  100  according to the first embodiment in the following points. 
     In the image pickup apparatus  100 A according to the second embodiment, a transparent conductive film  130 A is formed so as to have a moth eye structure (MEY) showing optical characteristics by a fine structure pattern having a regular unevenness of a sub-micron order (e.g., 100 μm to 500 μm). 
     The reason why the moth eye structure is used for the transparent conductive film  130 A is described as follows. 
     An ITO or ZnO2 used as a general transparent conductive film has a high refractive index of 1.9 to 2.0, so when such a transparent conductive film is formed with a flat structure, a large reflection is caused, which may degrade the optical characteristics. 
     In view of this, in the second embodiment, in order to avoid increasing the reflection and degrading the optical characteristics, the moth eye structure is employed. 
     Further, at this time, it is desirable that the refractive index of an optical element material is as high as possible, and the refractive index of 1.6 or more is necessary. 
     The moth eye structure is formed in a photoresist process by dry etching or wet etching. 
     The optical device having the moth eye structure formed is bonded with the sealing glass  120  with a transparent adhesive  190  with less optical characteristic degradation. As a result, a WCSP having a cavityless structure is formed. 
     Also in the image pickup apparatus  100 A according to the second embodiment, the electrode pad  140  serving as a ground terminal on the optical device  110  is opened and is in contact with the transparent conductive film  130 A to be electrically connected therewith. The connection pad  150  serving as another external connection terminal is not opened and is therefore not be electrically connected with the transparent conductive film  130 A. 
     As described above, in the second embodiment, the transparent conductive film  130 A is formed on a sensor surface with the moth eye structure. 
     The transparent conductive film  130 A is connected with the electrode pad  140  and is connected with the external connection terminal  170  through the penetrating electrode  160  connected to the electrode pad  140 , and the external connection terminal  170  is connected with an external reference potential (ground potential). 
     As a result, the transparent conductive film  130 A functions as the shield material, in addition to the function as the protection film of the optical element area, and the optical device  110  is covered with the EMC shield. 
     Other structures of the image pickup apparatus  100 A are the same as the image pickup apparatus  100 . 
     &lt;3. Third Structural Example of Image Pickup Apparatus&gt; 
       FIGS. 6A and 6B  are views each showing a third structural example of an image pickup apparatus according to a third embodiment. 
       FIG. 6A  is a plan view showing a structural example in which a transparent conductive film is disposed on a first surface side of a substrate, and  FIG. 6B  is a schematic side view showing an entire structure of the image pickup apparatus. 
     An image pickup apparatus  100 B according to the third embodiment is different from the image pickup apparatus  100  according to the first embodiment in the following points. 
     In the image pickup apparatus  100 B according to the third embodiment, in order to avoid degradation of the optical characteristics of the transparent conductive film, a transparent conductive film  130 B is not formed on the optical element area  112 , although the effect of the EMC shield is reduced. 
     With this structure, the image pickup apparatus  100 B according to the third embodiment is structured as a cavity structure having an air layer (cavity) CVT which is disposed between the sealing glass  120  and the optical device  110 . 
     In the image pickup apparatus  100 B, on the transparent conductive film  130 B formed outside the optical element area  112 , an adhesive  190 B (material which does not have to take the degradation of the optical characteristics into consideration) is applied and is bonded with the sealing glass  120 . 
     Alternatively, with an adhesive which is pattern-formed on the sealing glass  120  into an area shape thereof, the transparent conductive film is bonded with the sealing glass  120 . 
     Other structures of the image pickup apparatus  100 B are the same as the image pickup apparatus  100 . 
     &lt;4. Fourth Structural Example of Image Pickup Apparatus&gt; 
       FIGS. 7A and 7B  are views each showing a fourth structural example of an image pickup apparatus according to this embodiment. 
       FIG. 7A  is a plan view showing a structural example in which a transparent conductive film is disposed on a first surface side of a substrate, and  FIG. 7B  is a schematic side view showing an entire structure of the image pickup apparatus. 
     An image pickup apparatus  100 C according to a fourth embodiment is different from the image pickup apparatus  100 B according to the third embodiment in the following points. 
     In the image pickup apparatus  100 C according to the fourth embodiment, a large number of holes  132  are formed to increase a surface area of a transparent conductive film  130 C. 
     In the case where the shield effect of the transparent conductive film is insufficient, by increasing the surface area (in particular, in a depth direction), it is possible to enhance the shield effect (see, Design technique for EMC, Part 4: shield, http://homepage3.nifty.com/tsato/dtemc/part4.html). 
     For this reason, in the fourth embodiment, the structure in which the transparent conductive film  130 C has arbitrary holes  132  is employed. 
     Further, surrounding the optical device  110  by the transparent conductive film is effective for the EMC measure. Therefore, in the fourth embodiment, the transparent conductive film  130 C is formed on an opposed surface  121  (side surface of the optical device) of the sealing glass  120 . 
     It is desirable that the transparent conductive film  130 C is extremely close to a transmittance of 100% and the refractive index of approximately 1.5 of the glass. 
     As described above, in the fourth embodiment, in order to increase the surface area of the transparent conductive film  130 C, the large number of holes  132  are formed. By the penetrating electrode  160  and the electrode pad  140  serving as a ground terminal of the optical device  110  and the transparent conductive film  130 C, the connection to an external ground terminal is carried out. 
     As a result, the transparent conductive film  130 C functions as the shield material, in addition to the function as the protection film of the optical element area, and the optical device  110  is covered with the EMC shield. 
     &lt;5. Fifth Structural Example of Image Pickup Apparatus&gt; 
       FIGS. 8A and 8B  are views each showing a fifth structural example of an image pickup apparatus according to this embodiment. 
       FIG. 8A  is a plan view showing a structural example in which a transparent conductive film is disposed on a first surface side of a substrate, and  FIG. 8B  is a schematic side view showing an entire structure of the image pickup apparatus. 
     An image pickup apparatus  100 D according to a fifth embodiment is different from the image pickup apparatus  100 A according to the second embodiment in the following points. 
     In the second embodiment, the transparent conductive film  130 A has the moth eye structure. 
     In contrast, in the fifth embodiment, a cavityless WCSP using a transparent film  200  with a moth eye structure having no conductivity is achieved. 
     As described above, in the fifth embodiment, the transparent film  200  is formed on a sensor surface with the moth eye structure. 
     Then, the transparent conductive film  130 D is connected with the electrode pad  140  and is connected with the external connection terminal  170  through the penetrating electrode  160  connected to the electrode pad  140 , and the external connection terminal  170  is connected to an external reference potential (ground potential). 
     With this structure, the transparent conductive film  130 D functions as the shield material in addition to the function as the protection film of the optical element area, and the optical device  110  is covered with the EMC shield. 
     Other structures of the image pickup apparatus  100 D are the same as the image pickup apparatus  100 A. 
     According to the embodiments, the following effects can be obtained. 
     The WCSP which has been subjected to the EMC measure can be provided. 
     By providing the WCSP which has been subjected to the EMC measure, a small, low-cost lens-integrated camera module can be provided. 
     By providing the cavityless WCSP, it is possible to attain a reduction in warp in a cavity area due to a reduction in thickness of the silicon, an increase in intensity of the cavity area, and a reduction in peeling of a spacer due to an increase in internal pressure of the cavity area at the time of reflow. 
     There is no limitation of a shield film material of the lens-integrated camera module, and a conductive or insulating material can be used. 
     Although an EMC resistance depends on the thickness of the conductive film, it is possible to adjust the EMC resistance in the WCSP by performing control with the shape of the transparent conductive film. 
     Because the penetrating electrode allows the shield (transparent conductive film) to be connected with the external ground, it is unnecessary to consider a connection method between the external connection terminal on the lower surface and the conductive film formed on the side surface. 
     It is possible to apply the image pickup apparatuses  100  and  100 A to  100 D described above to a camera module having an image pickup lens. 
     &lt;6. Structural Example of Camera Module&gt; 
       FIG. 9  is a view showing a structural example of a camera module according to this embodiment. 
       FIG. 9  shows a structural example of a lens-integrated camera module in the case where the EMC measure is sufficiently conducted in the WCSP structure. As an image pickup apparatus, the image pickup apparatus  100 A according to the second embodiment is used as an example, but the image pickup apparatus  100 ,  100 B,  100 C, or  100 D according to another embodiment can be applied thereto. 
     On the WCSP, an image pickup lens  310  is mounted with an adhesive  301 , and a light shield film  332  is applied on a side surface. 
     In a camera module  300 , the image pickup lens  310  which forms a subject image on the optical element area (light receiving unit)  112  of the optical device (sensor)  110  is disposed on a front surface side (subject side) of the image pickup apparatus  100 A. 
     The camera module  300  has a signal processing unit (not shown) or the like in addition to the image pickup lens  310 . 
     In the camera module  300  having the above structure, an optical process is performed in the light receiving unit so that light from the subject taken by the image pickup lens  310  is easily converted into an electrical signal in the image pickup apparatus. After that, the light is guided to a photoelectric conversion unit of the optical device (sensor)  110 , and the photoelectric conversion is performed to obtain the electrical signal. Then, in a signal processing unit in a subsequent stage, a predetermined signal process is performed with respect to the electrical signal obtained. 
     In the camera module according to this embodiment, it is also possible to sufficiently exert the EMC or EMI effect while preventing an increase in size of the module, a complication of the process, and an increase in cost. 
     It should be noted that the present disclosure can take the following configurations. 
     (1) An image pickup apparatus, including:
         an optical device in which an optical element area for receiving light is formed on a side of a first surface of a substrate, and an external connection terminal is formed on a side of a second surface opposite to the first surface of the substrate;   a transparent conductive film formed to face the first surface of the substrate;   an electrode pad formed on the first surface of the substrate and configured to perform connection with a fixed potential; and   a penetrating electrode connected to the electrode pad and formed to penetrate the substrate between the first surface and second surface, in which   the transparent conductive film is connected to the electrode pad, and   the penetrating electrode is connected to the external connection terminal on the side of the second surface of the substrate.       

     (2) The image pickup apparatus according to Item (1), in which
         the transparent conductive film is formed as a moth eye structure so that at least an area opposed to the optical element area shows optical characteristics with a fine pattern.       

     (3) The image pickup apparatus according to Item (1), in which
         in at least the area opposed to the optical element area, a transparent film formed as a moth eye structure that shows optical characteristics with a fine pattern is disposed.       

     (4) The image pickup apparatus according to any one of Items (1) to (3), in which
         in at least a part of the transparent conductive film, a hole is formed in a depth direction.       

     (5) The image pickup apparatus according to any one of Items (1) to (4), further including
         a sealing material configured to protect a side of the optical element area of the optical device, in which   the transparent conductive film is formed to fill a gap between the first surface of the substrate including the optical element area and a surface of the sealing material which is opposed to the first surface.       

     (6) The image pickup apparatus according to any one of Items (1) to (4), in which
         the transparent conductive film is formed in a non-contact state with the optical element area.       

     (7) The image pickup apparatus according to Item (6), further including
         a sealing material configured to protect a side of the optical element area of the optical device, in which   the transparent conductive film is formed on a surface of the sealing material, which is opposed to the optical element area, across at least the optical element area and a cavity.       

     (8) The image pickup apparatus according to Item (6), in which
         the transparent conductive film is formed on an area excluding an area opposed to the optical element area.       

     (9) The image pickup apparatus according to any one of Items (1) to (8), in which
         on the side of the first surface of the substrate, a pad different from the electrode pad is formed, and the different pad is in an electrically non-contact state with the transparent conductive film.       

     (10) A camera module, including:
         an image pickup apparatus including an optical element area for receiving light; and   a lens configured to form a subject image on the optical element area of the image pickup apparatus, in which   the image pickup apparatus includes   an optical device in which an optical element area for receiving light is formed on a side of a first surface of a substrate, and an external connection terminal is formed on a side of a second surface opposite to the first surface of the substrate,   a transparent conductive film formed to face the first surface of the substrate,   an electrode pad formed on the first surface of the substrate and configured to perform connection with a fixed potential, and   a penetrating electrode connected to the electrode pad and formed to penetrate the substrate between the first surface and second surface,   the transparent conductive film is connected to the electrode pad, and   the penetrating electrode is connected to the external connection terminal on the side of the second surface of the substrate.       

     (11) The camera module according to Item (10), in which
         the transparent conductive film is formed as a moth eye structure so that at least an area opposed to the optical element area shows optical characteristics with a fine pattern.       

     (12) The camera module according to Item (10), in which
         in at least the area opposed to the optical element area, a transparent film formed as a moth eye structure that shows optical characteristics with a fine pattern is disposed.       

     (13) The camera module according to any one of Items (10) to (12), in which
         in at least a part of the transparent conductive film, a hole is formed in a depth direction.       

     (14) The camera module according to any one of Items (10) to (13), further including
         a sealing material configured to protect a side of the optical element area of the optical device, in which   the transparent conductive film is formed to fill a gap between the first surface of the substrate including the optical element area and a surface of the sealing material which is opposed to the first surface.       

     (15) The camera module according to any one of Items (10) to (13), in which 
     the transparent conductive film is formed in a non-contact state with the optical element area. 
     (16) The camera module according to Item (15), further including 
     a sealing material configured to protect a side of the optical element area of the optical device, in which 
     the transparent conductive film is formed on a surface of the sealing material, which is opposed to the optical element area, across at least the optical element area and a cavity. 
     (17) The camera module according to Item (15), in which 
     the transparent conductive film is formed on an area excluding an area opposed to the optical element area. 
     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.