Patent Publication Number: US-2019189674-A1

Title: Photodetector and method for manufacturing photodetector

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application is a divisional of U.S. application Ser. No. 15/257,331, filed on Sep. 6, 2016, which is a continuation of PCT international application Ser. No. PCT/JP2014/077459 filed on Oct. 15, 2014 which designates the United States, and which claims the benefit of priority from Japanese Patent Application No. 2014-058931, filed on Mar. 20, 2014. The entire contents of each of these documents are incorporated herein by reference. 
    
    
     FIELD 
     Embodiments described herein relate generally to a photodetector and a method for manufacturing the photodetector. 
     BACKGROUND 
     A photodetector such as a silicon photo multiplier (SiPM) in which a plurality of avalanche photo diodes (APDs) is arrayed as photo detection elements has been known. The SiPM takes advantage of an avalanche breakdown to cause the APD to work under a condition of a reverse bias voltage higher than an avalanche breakdown voltage of the APD, thereby driving the APD in a range called a Geiger mode. A gain of the APD during working in the Geiger mode is extremely high ranging from 10 5  to 10 6  and thus, even weak light of one photon can be measured. 
     Meanwhile, a device employing a multi-pixel structure using the plurality of APDs as one pixel and combined with a scintillator that converts an X-ray into light has been disclosed. When the APD and the scintillator are combined with each other, a photon counting image having a spatial resolution in accordance with a size of the scintillator can be acquired. For example, a technique for acquiring a computed tomography (CT) image by detecting the X-ray has been also known. 
     In order to acquire a higher quality image, a larger number of pixels need to be arranged at a high density. In a manufacturing process for the photodetector, a through electrode called a through silicon via (TSV) electrode needs to be formed. When the through electrode is formed, it is necessary to shape a substrate including the photo detection element into a thin layer of approximately several tens micrometers. In the manufacturing process for the photodetector, in order to prevent damage or the like to the substrate including the photo detection element, a supporting substrate for reinforcement is first bonded thereto and then, processing for the layer thinning, the through electrode, and the like is carried out. Subsequently, after the processing, the supporting substrate is removed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic view illustrating an exemplary inspection device; 
         FIG. 2  is a view illustrating an array state of a photodetector; 
         FIG. 3  is a plan view of the photodetector; 
         FIG. 4  is a perspective view of the photodetector; 
         FIG. 5  is a cross-sectional view taken along line A-A′ in  FIG. 3 ; 
         FIG. 6A  is an enlarged schematic view illustrating a portion of a first member; 
         FIG. 6B  is a schematic view illustrating a configuration with a reflection layer provided on a surface opposing a light conversion member; 
         FIG. 6C  is a schematic view illustrating another mode of the first member; 
         FIG. 7  is a view of a photodetector; 
         FIG. 8  is a view of a photodetector; 
         FIG. 9  is a view of a photodetector; 
         FIG. 10  is a view of a photodetector; 
         FIG. 11A  is an explanatory view for a method for manufacturing a photodetector; 
         FIG. 11B  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 11C  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 11D  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 11E  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 11F  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 11G  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 11H  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 11I  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 12A  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 12B  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 12C  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 12D  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 12E  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 12F  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 12G  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 12H  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 13  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 14A  is an explanatory view for a method for manufacturing a photodetector; 
         FIG. 14B  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 14C  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 15A  is an explanatory view for a method for manufacturing a photodetector; 
         FIG. 15B  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 15C  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 15D  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 15E  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 15F  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 15G  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 15H  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 15I  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 16A  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 16B  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 16C  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 16D  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 16E  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 16F  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 16G  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 16H  is an explanatory view for the method for manufacturing a photodetector; 
         FIG. 17A  is an explanatory view for a method for manufacturing a photodetector; 
         FIG. 17B  is an explanatory view for the method for manufacturing a photodetector; and 
         FIG. 18  is a view of the photodetector. 
     
    
    
     DETAILED DESCRIPTION 
     According to an embodiment, a photodetector includes a photo detection layer, a plurality of light conversion members, and a first member. The photo detection layer includes, on a light incident surface on which light is incident, a plurality of pixel regions and a surrounding region. The plurality of pixel regions each holds a photo detection element configured to detect the light. The surrounding region is a region other than the pixel regions on the light incident surface. The plurality of light conversion members is arranged so as to oppose the pixel regions in the photo detection layer and converts radiation to the light. Each of the light conversion members includes a bottom surface opposing the pixel region in the photo detection layer, a top surface opposing the bottom surface, and a lateral surface connecting the bottom surface and the top surface. The first member is disposed on at least a portion of the surrounding region on the light incident surface and covers a portion of the lateral surface of the light conversion member. 
     Various embodiments will be described in detail below with reference to the accompanying drawings. In the present description, similar members or sections indicating similar functions are denoted with similar reference numerals and the description thereof will be omitted in some cases. 
     First Embodiment 
       FIG. 1  is a schematic view illustrating an exemplary inspection device  1  according to the embodiment. 
     The inspection device  1  includes a light source  9 , a detection unit  20 , and a driving unit  13 . The light source  9  and the driving unit  13  may be electrically connected to the detection unit  20 . 
     The light source  9  and the detection unit  20  are arranged so as to oppose each other with an interval. In addition, the light source  9  and the detection unit  20  are disposed rotatably about a subject  12  while maintaining the aforementioned opposing state of arrangement. 
     The light source  9  radiates a radiation  13 A such as an X-ray toward the opposing detection unit  20 . The radiation  13 A radiated from the light source  9  passes through the subject  12  on a trestle (not illustrated) and then enters the photodetector  10  disposed in the detection unit  20 . 
     The detection unit  20  includes the plurality of photodetectors  10  and a signal processing circuit  22 . The photodetector  10  is a device that detects light. The photodetectors  10  and the signal processing circuit  22  are electrically connected to each other. In the embodiment, the plurality of photodetectors  10  disposed in the detection unit  20  is arrayed along a predetermined rotation direction (a direction indicated by arrows S in  FIG. 1 ). 
     Each of the photodetector  10  receives, via a collimator  21 , the radiation  13 A as light, which has been radiated from the light source  9  and then passed through the subject  12 . The collimator  21  is installed on the side of a light incident surface  11  of the photodetector  10  and refracts the radiation  13 A such that the radiation  13 A enters the photodetector  10  in parallel thereto. 
     The photodetector  10  detects light. The photodetector  10  outputs an electrical signal in accordance with the detected light to the signal processing circuit  22  via a signal line  23 . The signal processing circuit  22  controls the entire inspection device  1 . The signal processing circuit  22  acquires the electrical signal from the photodetector  10 . 
     In the embodiment, the signal processing circuit  22  calculates, from a current value of the acquired electrical signal, the energy and the strength of the radiation that has entered each of the photodetectors  10 . Thereafter, the signal processing circuit  22  generates a radiation image of the subject  12  from the energy and the strength of the radiation entering each of the photodetectors  10 . 
     The driving unit  13  rotates the light source  9  and the detection unit  20  about the subject  12  positioned between the light source  9  and the photodetectors  10  in the rotation direction (the direction indicated by the arrows S in  FIG. 1 ) while maintaining the opposing state of the light source  9  and the detection unit  20 . As a result, the inspection device  1  can generate a cross-sectional image of the subject  12 . The driving unit  13  may rotate the photodetectors  10  in the detection unit  20  and the light source  9  while maintaining the opposing state thereof. 
     The subject  12  is not limited to a human body. The subject  12  may be an animal or a plant, or alternatively, may be a nonliving thing such as an article. Accordingly, the inspection device  1  can be applied as various types of inspection devices not only for tomographic images of a human body, an animal, and a plant, but also, for example, for the observation of the inside of an article by seeing therethrough, such as a security device. 
       FIG. 2  is a view illustrating an array state of the photodetector  10  equipped in the inspection device  1 . The plurality of photodetectors  10  is arrayed substantially in a circular arc shape along the rotation direction (the directions indicated by the arrows S in  FIG. 1  and  FIG. 2 ). The collimator  21  is disposed on a light incident side of the photodetector  10 . 
       FIG. 3  is a plan view illustrating an example of the photodetector  10 .  FIG. 4  is a perspective view illustrating an example of the photodetector  10 .  FIG. 5  is a cross-sectional view taken along line A-A′ in  FIG. 3 . 
     As illustrated in  FIG. 5 , the photodetector  10  includes a photo detection layer  32 , an adhesive layer  34 , light conversion members  18 , and a first member  30 . 
     The light conversion members  18  convert the radiation into light (photon) having a longer wavelength than that of the radiation. The light converted at the light conversion members  18  is emitted to the photo detection layer  32 . This means that the light conversion members  18  are arranged on a light incident surface side of the photo detection layer  32 . The light conversion member  18  includes a top surface, a bottom surface opposing this top surface, and a lateral surface connecting the top surface and the bottom surface. The bottom surface opposes a pixel region  11 A in the photo detection layer  32  described later. For example, in a case where the light conversion member  18  has a quadrangular prism shape, the light conversion member  18  has four lateral surfaces. 
     The light conversion member  18  is composed of a scintillator. The scintillator emits fluorescence (scintillation light) when the radiation such as the X-ray enters the scintillator. In the embodiment, the fluorescence (scintillation light) emitted by the light conversion member  18  is simply referred to as light in the description. The constituent material of the scintillator is selected as appropriate depending on an object to which the photodetector  10  is applied. For example, the scintillator is made of Lu 2 SiO 5 :(Ce), LaBr 3 :(Ce), YAP (yttrium aluminum perovskite):Ce, or Lu(Y)AP:Ce, but not limited thereto. 
     The photo detection layer  32  detects the light converted at the light conversion members  18 . The photo detection layer  32  is a silicon photo multiplier (SiPM) in which a plurality of avalanche photo diodes (APDs) is arrayed as the photo detection elements  14 . The APD is a publicly known avalanche photo diode. In the embodiment, the photo detection element  14  is driven in a Geiger mode. 
     As illustrated in  FIG. 3 , the plurality of photo detection elements  14  is arrayed in a matrix form (refer to a direction indicated by an arrow X and a direction indicated by an arrow Y in  FIG. 3 ). The photo detection layer  32  has a configuration in which the plurality of photo detection elements  14  is set as one pixel (pixel region  11 A) and the plurality of pixel regions  11 A is arrayed in a matrix form. 
     In detail, the photo detection layer  32  includes, on the light incident surface  11  on which the light is incident, the pixel regions  11 A, each of which holds the plurality of photo detection elements  14  configured to detect the light, and a surrounding region  11 B corresponding to a section other than the pixel regions  11 A on the light incident surface  11 . 
       FIG. 3  has illustrated a case where each of the pixel regions  11 A is configured so as to have 25 (5×5) photo detection elements  14  in array. However, the number of the photo detection elements  14  constituting each of the pixel regions  11 A is merely an example and not limited to 25. 
     As illustrated in  FIG. 5 , the light conversion members  18  are arranged so as to oppose the pixel regions  11 A. In the embodiment, the light conversion members  18  are arranged on the side of the light incident surface  11  of the photo detection layer  32 . 
     The photodetector  10  has a layered structure in which the photo detection layer  32 , the adhesive layer  34 , and the light conversion members  18  along with the first member  30  are layered in this order. The light conversion members  18  and the first member  30  are adhered to the photo detection layer  32  through the adhesive layer  34 . 
     In the example illustrated in  FIG. 5 , the adhesive layer  34  is composed of a second adhesive layer  34 B adhering the light conversion members  18  and the photo detection layer  32  to each other and a first adhesive layer  34 A adhering the photo detection layer  32  and the first member  30  to each other. The adhesive layer  34  may be composed of one layer, or alternatively, may be composed of a plurality of layers. For example, the adhesive layer  34  may have a layered structure in which the first adhesive layer  34 A and the second adhesive layer  34 B are layered. 
     The adhesive layer  34  has a transmission property allowing the light emitted from the light conversion members  18  to pass through. A layer thickness of the adhesive layer  34  is not limited and, for example, ranges from several micrometers to several hundred micrometers. 
     The photo detection layer  32  has a layered structure in which a silicon oxide layer  51 , a second silicon layer  53 , an insulation film  56 , and the like are layered in this order from the side of the light incident surface  11 . 
     The silicon oxide layer  51  holds a common wire  54  therein. For example, the main component of the silicon oxide layer  51  is silicon dioxide (SiO 2 ). The common wire  54  is provided extending along the light incident surface  11  of the photo detection layer  32  in a flat surface shape and serves as a mesh-shaped metal wire arranged so as to be accommodated within the pixel region  11 A. The common wire  54  is made of, for example, aluminum or copper. 
     On a region of the second silicon layer  53  in contact with the silicon oxide layer  51 , the plurality of photo detection elements  14  is arrayed along the light incident surface  11  for each of the pixel region  11 A. 
     The photo detection element  14  is an APD formed as a PN-type diode obtained by doping a P-type silicon layer with boron. The photo detection element  14  electrically connects, through the avalanche breakdown, the side of the silicon oxide layer  51  (anode) with the side of the second silicon layer  53  (cathode) in the photo detection element  14  in a reverse bias direction. Each of the photo detection elements  14  within the pixel region  11 A is connected to the common wire  54  via a lead wire inserted into a contact hole formed toward the common wire  54  from the anode side of the photo detection element  14 . For example, the photo detection elements  14  are formed at intervals of 25 μm with one another. 
     In addition, each of the photo detection elements  14  has a serial resistance (not illustrated). For example, this serial resistance is formed by a polysilicon layer. The common wire  54  is not limited to serving as the mesh-shaped metal wire. The common wire  54  is at least required to have a light transmittance at a level enough for the photo detection element  14  to be able to detect the incident light from the light conversion members  18  and a shape allowing the photo detection elements  14  within the same pixel region  11 A to electrically connect with each other via the lead wire. 
     The second silicon layer  53  is a layer formed of N-type silicon. The second silicon layer  53  electrically connects each of the photo detection elements  14  within the pixel region  11 A with a common electrode  59  described later. 
     The insulation film  56  is a layer shielding a surface of the second silicon layer  53  on an opposite side of the silicon oxide layer  51 . The insulation film  56  is formed by an insulating member. For example, the insulation film  56  is formed of silicon dioxide (SiO 2 ). A solder mask  61  is disposed on a surface of the insulation film  56  on an opposite side of the second silicon layer  53  with a seed layer  70  interposed therebetween. 
     In addition, a recessed portion  55  is formed in the photo detection layer  32  so as to pass through the second silicon layer  53  from the side of the insulation film  56  along a layered direction of the second silicon layer  53  and the silicon oxide layer  51  until a position where the common wire  54  within the silicon oxide layer  51  is reached. An inner side of the recessed portion  55  is filled with a through electrode  58  with the insulation film  56  interposed therebetween. The through electrode  58  and the common wire  54  are electrically connected with each other. 
     The common electrode  59  is disposed on a portion of a region of the insulation film  56  extending toward the center of the pixel region  11 A from the recessed portion  55 . 
     In the example illustrated in  FIG. 5 , the photodetector  10  is mounted on a mounted substrate  36 . The photodetector  10  is mounted on the mounted substrate  36  with the through electrode  58 , a bump  62 , and an electrode  63  interposed therebetween. 
     When the photodetector  10  configured as described above is irradiated with the radiation  13 A (refer to  FIG. 1 ) from the light source  9  (refer to  FIG. 1 ), the radiation  13 A enters the light conversion members  18  of the photodetector  10 . The light conversion members  18  convert the radiation  13 A to light and emit the light to the photo detection layer  32 . 
     The light emitted from the light conversion members  18  enters the photo detection elements  14  in the photo detection layer  32 . 
     A drive voltage in reverse bias relative to a PN junction of the photo detection element  14 , which is equal to or higher than an avalanche breakdown voltage, is applied between the through electrode  58  and the common electrode  59  through the control by the signal processing circuit  22  (refer to  FIG. 1 ). When the light enters the photo detection element  14  in this state, a pulsed current flows in the photo detection element  14  in a reverse bias direction, whereby a current flows between the through electrode  58  and the common electrode  59 . Thereafter, the current flowing between the through electrode  58  and the common electrode  59  is output to the signal processing circuit  22  via the signal line  23  as an electrical signal. As a result, the photodetector  10  detects the light. 
     In the embodiment, the photodetector  10  includes the first member  30 . 
     The first member  30  is a member disposed on at least a partial region of the surrounding region  11 B on the light incident surface  11  of the photo detection layer  32  and covering a portion of the lateral surface of the light conversion member  18 . 
     In the embodiment, the first member  30  is disposed continuously in the surrounding region  11 B so as to enclose the circumference of the plurality of pixel regions  11 A (refer to  FIG. 3  to  FIG. 5 ). 
     The shape of the first member  30  is not limited as long as the first member  30  protrudes from the light incident surface  11  of the photo detection layer  32  toward an opposite side of the light incident surface  11  so as to cover a portion of each of the light conversion members  18 . It is preferable that the surfaces of the first member  30  opposing the light conversion members  18  are formed in a shape in accordance with the light conversion members  18  (refer to  FIG. 3 ). 
     The length of the first member  30  in the layered direction of the light conversion member  18  and the photo detection layer  32  is at least required to be as much length as necessary to protrude from the light incident surface  11  toward the opposite side of the light incident surface  11 . 
     However, it is preferable that the length of the first member  30  in the aforementioned layered direction be smaller than the length of the light conversion member  18  adjacent to that first member  30  in the aforementioned layered direction. 
     It is preferable that the width of the first member  30  in a direction along the light incident surface  11  be smaller than the interval between the adjacent pixel regions  11 A. In addition, a minimum value of the width of the first member  30  in the direction along the light incident surface  11  is at least required to be a width that can realize as much strength as necessary to prevent damage to the photo detection layer  32  and a crystal defect therein from occurring during a manufacturing process for the photodetector  10 . 
     The material of the first member  30  is not limited. It is preferable for the first member  30  to have light reflectivity. In detail, it is preferable that at least a section of the first member  30  covering the light conversion members  18  be formed of a light reflective material. For example, it is preferable that at least a section of the first member  30  opposing the lateral surfaces of the light conversion members  18  be formed of a light reflective material and a portion thereof other than this section be formed of a light transmissive material. The lateral surfaces of the light conversion member  18  are surfaces of the light conversion members  18  intersected by an imaginary straight line perpendicular to the layered direction of the light conversion members  18  and the photo detection layer  32 . 
     The light reflectivity according to the embodiment at least represents a property of reflecting the light detected by the photo detection element  14 . The light transmission property according to the embodiment at least represents a property of transmitting the light detected by the photo detection element  14 . 
       FIG. 6A  to  FIG. 6C  are enlarged schematic views, each illustrating a section corresponding to one pixel region  11 A in the photodetector  10 . For the purpose of the description, each of  FIG. 6A  to  FIG. 6C  illustrates a state where the light conversion members  18  are not bonded to the side of the photo detection layer  32 . Actually, however, the light conversion members  18  are arranged so as to oppose the pixel regions  11 A in the photo detection layer  32  and be bonded to the photo detection layer  32  with the adhesive layer  34  interposed therebetween. Accordingly, the light conversion members  18  are put into a state where at least a portion of an outer circumferential surface thereof in a direction intersecting the aforementioned layered direction is supported by the first member  30 . 
       FIG. 6A  is an enlarged schematic view illustrating a portion of the first member  30 . 
     As described above, it is preferable that at least a section of the first member  30  opposing the lateral surfaces of the light conversion members  18  be formed of a light reflective material and a portion thereof other than this section be formed of a light transmissive material. With this configuration, the enhancement of the sensitivity of the photo detection element  14  can be achieved. 
     The first member  30  may be entirely formed of a light transmissive material. From the viewpoint of the enhancement of the sensitivity, however, it is preferable that at least a section of the first member  30  opposing the lateral surface of the light conversion member  18  be formed of a light reflective material and a portion thereof other than this section be formed of a light transmissive material. A publicly known glass material or the like can be used as the light transmissive material. 
     When the first member  30  has the reflectivity, the light converted at the light conversion members  18  is reflected by the first member  30  and then emitted to the photo detection layer  32  efficiently. As a consequence, the enhancement of the light detection ability of the photo detection element  14  can be achieved. In addition, compared to a case where a reflective member having the reflectivity is separately disposed in the photodetector  10 , an uncomplicated configuration and simplified manufacturing can be achieved for the photodetector  10 . 
     When the first member  30  is configured to have the reflectivity, the first member  30  is simply made of a material having a property of reflecting light in a sensitivity wavelength range of the photo detection element  14 . For example, the first member  30  can be made of a material obtained by mixing fine powder of TiO 2 , BaSO 4 , Ag, or the like to binder resin. 
     The first member  30  may be configured to be disposed with a reflection layer having the aforementioned reflectivity on the surfaces thereof opposing the light conversion members  18 . Specifically, a section of the first member  30  on the side of the collimator  21  (refer to  FIG. 1 ) may have the light reflectivity.  FIG. 6B  is a schematic view illustrating a configuration with a reflection layer  38  provided on the surfaces of the first member  30  opposing the light conversion members  18 . 
     When the first member  30  includes the reflection layer  38  on the surfaces thereof opposing the light conversion members  18 , the light converted at the light conversion members  18  is reflected by the reflection layer  38 . As a consequence, the enhancement of the light detection ability of the photo detection element  14  can be achieved. The reflection layer  38  is simply made of a material having at least a property of reflecting light in a sensitivity wavelength range of the photo detection element  14 . For example, the reflection layer  38  can be made of a material obtained by mixing fine powder of TiO 2 , BaSO 4 , Ag, or the like to binder resin. 
     The reflection layer  38  may be disposed so as to cover at least a section of the light conversion members  18  not disposed in the first member  30 . 
     As described thus far, the photodetector  10  according to the embodiment includes the first member  30 . 
     Here, conventionally, there is a case where, in the manufacturing process for the photodetector  10 , damage to the photo detection element  14  or a crystal defect therein occurs when a supporting substrate used during the manufacturing process is removed from the photo detection layer  32  including the photo detection element  14 . Meanwhile, when the photodetector  10  is configured to be provided with the supporting substrate without removing the supporting substrate, there has been a case where crosstalk occurs between the adjacent pixel regions  11 A. For this reason, in the past, the detection accuracy of the photo detection element  14  has been deteriorated in some cases. 
     On the other hand, the photodetector  10  according to the embodiment includes the first member  30 . The first member  30  is a member disposed on at least a partial region of the surrounding region  11 B on the light incident surface  11  of the photo detection layer  32  and protruding toward the opposite side of the light incident surface  11 . 
     Accordingly, when the photodetector  10  is manufactured, even in a case where the supporting substrate is bonded for the purpose of reinforcing and protecting the photo detection layer  32  during manufacturing, the supporting substrate is bonded to the side of the photo detection layer  32  with the first member  30  interposed therebetween and, in this state, the photo detection layer  32  is subjected to processing. As a result, the occurrence of damage to the photo detection element  14  and a crystal defect therein can be suppressed while the supporting substrate is removed. In addition, because it is not necessary to configure the photodetector  10  as including the supporting substrate, the occurrence of crosstalk can be suppressed. 
     Consequently, the photodetector  10  according to the embodiment can suppress the deterioration of the detection accuracy of the photo detection element  14 . 
     Meanwhile, the first member  30  is disposed on at least a portion of the surrounding region  11 B corresponding to a section other than the pixel region  11 A on the light incident surface  11  of the photo detection layer  32 . Besides, the first member  30  has a shape protruding from the light incident surface  11  toward the opposite side of the light incident surface  11 . Accordingly, when the light conversion members  18  are arranged during the manufacturing process for the photodetector  10 , each of the light conversion members  18  can be arranged so as to oppose the pixel region  11 A by using the first member  30  as a positioning member. 
     As a result, in the embodiment, the light conversion members  18  can be accurately arranged so as to oppose the pixel region  11 A. Consequently, the photodetector  10  according to the embodiment can suppress the deterioration of the detection accuracy of the photo detection element  14 . 
     Additionally, in the embodiment, the first member  30  is disposed continuously in the surrounding region  11 B so as to enclose the plurality of pixel regions  11 A (refer to  FIG. 3 ). As a result, the effect of the first member  30  for reinforcing the photo detection layer  32  can be enhanced while the photodetector  10  is manufactured. 
     Furthermore, the first member  30  is disposed continuously in the surrounding region  11 B so as to enclose each of the plurality of pixel regions  11 A and thus, the light conversion members  18  can be accurately arranged so as to oppose each of the pixel regions  11 A while the photodetector  10  is manufactured. 
     Meanwhile, in the embodiment, the first member  30  is disposed on the whole region of the surrounding region  11 B other than the pixel region  11 A on the light incident surface  11  of the photo detection layer  32 . As a result, the light conversion members  18  can be accurately and easily arranged so as to oppose each of the pixel regions  11 A while the photodetector  10  is manufactured. Consequently, the photodetector  10  according to the embodiment can further suppress the deterioration of the detection accuracy of the photo detection element  14 . 
     In addition, in the embodiment, the surfaces of the first member  30  opposing the light conversion members  18  are formed in a shape in accordance with the light conversion members  18 . Accordingly, when the light conversion members  18  are arranged during the manufacturing process for the photodetector  10 , each of the light conversion members  18  can be easily and accurately arranged so as to oppose the pixel region  11 A by using the first member  30  as a positioning member. 
     Furthermore, the surfaces of the first member  30  opposing the light conversion members  18  are formed in a shape in accordance with the light conversion member  18  and thus, bonding areas of the first members  30  to the side of the photo detection layer  32  can be made larger. As a result, the effect of the first member  30  for reinforcing the photo detection layer  32  can be further enhanced while the photodetector  10  is manufactured. 
     Meanwhile, in the embodiment, the length of the first member  30  in the aforementioned layered direction is smaller than the length of the light conversion member  18  adjacent to that first member  30  in the aforementioned layered direction. When the length of the first member  30  in the aforementioned layering direction is smaller than the length of that light conversion member  18  in the aforementioned layered direction, the first member  30  can be used as a positioning member. While the photodetector  10  is manufactured, the light conversion members  18  can be arranged so as to oppose the pixel region  11 A more easily and accurately. 
     The first member  30  may be formed of a light transmissive material. Alternatively, the first member  30  may include a light transmissive material and a reflective material for covering the light conversion members  18  made of this light transmissive material. 
     Alternatively, a portion of the first member  30  may be disposed between the pixel region  11 A in the photo detection layer  32  and the light conversion member  18 . 
       FIG. 6C  is a schematic view illustrating another mode of the first member  30 . As illustrated in  FIG. 6C , the first member  30  may include a first portion  30 A covering a portion of the lateral surfaces of the light conversion member  18  and a second portion  30 B provided between the photo detection layer  32  and the light conversion member  18 . The thickness of the second portion  30 B is thinner than the thickness of the first portion  30 A. The thickness of the first portion  30 A and the thickness of the second portion  30 B represent respective thicknesses of the first portion  30 A and the second portion  30 B in the layered direction of the silicon oxide layer  51 , the second silicon layer  53 , and the insulation film  56 . 
     For example, the thickness of the second portion  30 B out of the first member  30  can be set to 30 μm or smaller. Meanwhile, the thickness of the first portion  30 A can be set to thicker than 30 μm. 
     When a portion of the first member  30  is disposed between the pixel region  11 A in the photo detection layer  32  and the light conversion member  18 , this portion is configured to have the light transmission property. Specifically, the second portion  30 B is configured to have the light transmission property. 
     First Modification 
     The photodetector  10  described in the first embodiment may be configured to further include reflective members  40 .  FIG. 7  is an explanatory view of a photodetector  10 A provided with the reflective members  40 . The photodetector  10 A is configured to further include the reflective members  40  in addition to the photodetector  10  described in the first embodiment. The reflective member  40  covers a section of the lateral surfaces of the light conversion member  18  other than a section thereof opposing the first member  30 . The reflective member  40  also covers a top surface of the light conversion member  18  opposing the collimator  21 . 
     The reflective member  40  transmits the radiation  13 A entering the light conversion member  18  (refer to  FIG. 1 ) while reflecting the light converted at the light conversion member  18 . The reflective member  40  can be made of a material having such a property. 
     The reflective members  40  are arranged in a manner to separate the light conversion members  18  into regions corresponding to the pixel regions  11 A. In addition, an end portion of the reflective member  40  on the side of the photo detection layer  32  is bonded to the first member  30 . The reflective member  40  covering a certain light conversion member  18  and the reflective member  40  covering another light conversion member  18  disposed adjacent to the certain light conversion member  18  may not be separated so as to be continuously disposed. In other words, one reflective member  40  may cover the plurality of light conversion members  18 . 
     The plurality of photo detection layers  32  may be formed so as to be separated from one another, or alternatively, may be formed so as to continue to one another instead of being separated. When the plurality of photo detection layers  32  is separated from one another, the reflective member  40  may be formed between the two adjacent photo detection layers  32 . As an example,  FIG. 7  illustrates a case where the reflective members  40  and the first members  30  are structured so as to be separated within the surrounding region  11 B. However, it is only required to separate the pixel regions  11 A from each other and thus, at least portions of the surrounding regions  11 B may be integrated to each other through a region corresponding to a space between the pixel regions  11 A. 
     Because the photodetector  10 A includes the reflective member  40 , the enhancement of the light detection ability of the photo detection element  14  can be achieved in addition to the effect in the first embodiment. 
     Second Modification 
     As an example, the aforementioned embodiment has described a case where the first members  30  are disposed continuously in the surrounding region  11 B so as to enclose the circumference of each of the plurality of pixel regions  11 A. However, the first member  30  is only required to be disposed on at least a partial region of the surrounding region  11 B on the light incident surface  11  of the photo detection layer  32 . 
       FIG. 8  is a view illustrating a photodetector  10 B according to the modification. As illustrated in  FIG. 8 , a mode may be employed in which the first members  30  are discontinuously disposed within the surrounding region  11 B. The example illustrated in  FIG. 8  indicates a mode where the first members  30  are discontinuously disposed in regions between the adjacent pixel regions  11 A within the surrounding region  11 B along a surface direction. The photodetector  10 B is similar to the photodetector  10  illustrated in  FIG. 1  except for having a different arrangement of the first member  30  within the surrounding region  11 B. 
       FIG. 9  is a view illustrating a photodetector  10 C according to the modification. As illustrated in  FIG. 9 , the first members  30  may be discontinuously disposed in regions other than spaces between the adjacent pixel regions  11 A within the surrounding regions  11 B. The photodetector  10 C is similar to the photodetector  10  illustrated in  FIG. 1  except for having a different arrangement of the first member  30  within the surrounding region  11 B. 
     The first members  30  may be formed so as to be discontinuously disposed in both of the regions between the adjacent pixel regions  11 A and the regions other than the regions between the adjacent pixel regions  11 A in the surrounding regions  11 B on the light incident surface  11  (the illustration is omitted). 
     Each of  FIG. 8  and  FIG. 9  has indicated a case where a cross-section of the first member  30  parallel to the light incident surface  11  has a rectangular shape. The cross-section of the first member  30  parallel to the light incident surface  11  is not limited to the rectangular shape and can be formed into an arbitrary shape such as a belt shape, an oval shape, or a circular shape. In addition, one first member  30  may be formed in the surrounding regions  11 B between the plurality of pixel regions  11 A arranged in a line and another plurality of pixel regions  11 A arranged in another line. This first member  30  may be disposed in a belt shape along the plurality of pixel regions  11 A arranged in a line. 
     Furthermore, when the first members  30  are discontinuously disposed, the first members  30  may be disposed at least on a downstream side of the pixel region  11 A in a first direction in the surrounding region  11 B on the light incident surface  11 . The first direction represents a direction in which force is applied to the photo detection element  14  when the photodetector  10  is driven in a predetermined direction. 
       FIG. 10  is a schematic view of a photodetector  10 D. The photodetector  10 D has a configuration in which the first member  30  is disposed on the downstream side of each of the plurality of pixel regions  11 A in the first direction (a direction indicated by an arrow YB in  FIG. 10 ) in the surrounding region  11 B. The photodetector  10 D is similar to the photodetector  10  in the first embodiment except for having a different position at which the first member  30  is disposed. 
     The first direction (the direction indicated by the arrow YB in  FIG. 10 ) can be adjusted as appropriate depending on a device in which the photodetector  10  is to be equipped. For example, when the photodetector  10  is equipped in the inspection device  1  illustrated in  FIG. 1 , the photodetector  10  is driven to rotate in the rotation direction (the direction indicated by the arrows  3  in FIG.  1 ). In this case, centrifugal force is applied to the photodetector  10  because of the rotation in the rotation direction. 
     Accordingly, when the photo detection element  14  is equipped in the inspection device  1 , the first direction (the direction indicated by the arrow YB in  FIG. 10 ) is set so as to be a direction of the centrifugal force generated by this rotation in the rotation direction (the direction indicated by the arrows S in  FIG. 1 ). 
     As described above, when the first member  30  is disposed at least on the downstream side of the pixel region  11 A in the first direction in the surrounding region  11 B on the light incident surface  11 , the following effects are obtained. That is, the displacement between the position of the light conversion member  18  and the position of the pixel region  11 A in the photo detection layer  32 , which is caused by force applied to the photo detection element  14  due to driving, can be suppressed. As a result, in addition to the effect described above, the photodetector  10 D can suppress the deterioration of the light detection ability of the photo detection layer  32 . 
     A device in which the photodetector  10  is equipped is not limited to the inspection device  1 . The photodetector  10  can be equipped in various types of devices. 
     Second Embodiment 
     In the embodiment, a method for manufacturing the photodetector  10  described in the first embodiment will be described. 
     The method for manufacturing the photodetector  10  includes a first process and a second process. The first process is a process of forming a layered body  80  (refer to  FIG. 12F ) in which a first member  30  covering a portion of a light conversion member  18  is arranged on at least a portion of a surrounding region  11 B in a photo detection layer  32 . The second process is a process of arranging the light conversion member  18  such that the light conversion member  18  opposes each of pixel regions  11 A in the photo detection layer  32  with the adhesive layer  34  interposed therebetween (refer to  FIG. 13 ). 
     Hereinafter, the method for manufacturing the photodetector  10  will be described in detail.  FIG. 11A  to  FIG. 11I ,  FIG. 12A  to  FIG. 12H , and  FIG. 13  are explanatory views for an example of the method for manufacturing the photodetector  10 . 
     First, multiple processes ( FIG. 11A  to  FIG. 11I ,  FIG. 12A  to  FIG. 12H ) are carried out as the first process. 
     As illustrated in  FIG. 11A , a publicly known CMOS process is used first to carry out a process of forming, on a light incident surface  11 , a first substrate  32 A including the pixel region  11 A and the surrounding region  11 B. The first substrate  32 A is a silicon substrate provided with a second silicon layer  53 A, a silicon oxide layer  51 , a photo detection element  14 , and a common wire  54 . The second silicon layer  53 A is a layer composed of a second silicon layer  53  prior to being shaped into a thin film. The silicon oxide layer  51 , the photo detection element  14 , and the common wire  54  are similar to those in the first embodiment. 
     Next, as illustrated in  FIG. 11B , a substrate provided with a through hole  30 A at a region corresponding to each of the pixel regions  11 A is prepared as the first member  30 . The through hole  30 A is a hole passing through this substrate in a thickness direction (same as the aforementioned layered direction). 
     It is preferable that a cross-sectional shape of the through hole  30 A along the light incident surface  11  be the same shape as a cross-sectional shape of the pixel region  11 A along the light incident surface  11 . The size of the cross-section of the through hole  30 A along the light incident surface  11  is at least required to be equal to or larger than the size of the cross-section of the pixel region  11 A along the light incident surface  11 . 
     The example illustrated in  FIG. 11  has indicated a case where a glass substrate is prepared as the substrate. Thereafter, the through hole  30 A is formed in this glass substrate using, for example, wet etching or dry etching, whereby the first member  30  is obtained. For example, an HF solution (hydrofluoric acid solution) is used for the wet etching and CF 4  (carbon tetrafluoride)-based gas is used for the dry etching. 
     Next, a process of arranging the first member  30  including the through hole  30 A on the side of the light incident surface  11  of the first substrate  32 A with a first adhesive layer  34 A interposed therebetween is carried out (refer to  FIG. 11B ). At this time, the through hole  30 A and the pixel region  11 A are positioned such that the positions thereof match (alignment) and then, the first substrate  32 A and the first member  30  are bonded to each other with the first adhesive layer  34 A interposed therebetween. 
     For example, thermosetting resin or UV curable resin is used for the first adhesive layer  34 A. 
     Next, a process of bonding a supporting substrate  44  on the side of the light incident surface II of the first substrate  32 A with the first member  30  and an adhesive layer  42  interposed therebetween is carried out (refer to  FIG. 11C ). 
     For example, a glass substrate is used for the supporting substrate  44 . The supporting substrate  44  is a plate-shaped member on which no pattern or the like is formed. This supporting substrate  44  plays a role of reinforcing and protecting the first substrate  32 A, the photo detection element  14 , and the like during the manufacturing process for the photodetector  10 . 
     It is preferable that an adhesive that can be removed through UV light irradiation or the like be used for the adhesive layer  42 . 
     Next, a process of obtaining the photo detection layer  32  by processing the first substrate  32 A is carried out. 
     In detail, first, the second silicon layer  53 A of the first substrate  32 A is shaped into a thin layer until a desired thickness is obtained (refer to  FIG. 11D ). For example, publicly known back grinding or chemical mechanical polishing (CMP) is used for layer thinning. It is desirable that a layer thickness of the second silicon layer  53  after being shaped into a thin layer be equal to or thinner than 100 μm. 
     Next, a resist film  46  for forming a through electrode  58  is patterned on a rear surface of the second silicon layer  53  after being shaped into a thin layer (refer to  FIG. 11E ). For example, positioning and patterning of the resist film  46  are carried out in such a manner that the through electrode  58  is formed at a position on the rear surface of the second silicon layer  53  where the through electrode  58  is required to be formed. Publicly known photolithography is used for patterning, for example. A publicly known photoresist is used for the resist film  46 . Alternatively, an oxide film or a nitride film subjected to Patterning after being formed may be used for the resist film  46 . 
     Next, a recessed portion  55  is formed on the rear surface of the second silicon layer  53  (refer to  FIG. 11F ). The recessed portion  55  is a hole passing through the second silicon layer  53  until reaching the common wire  54  in the silicon oxide layer  51 . Accordingly, a bottom portion of the recessed portion  55  corresponds to a partial region of the common wire  54 . For example, dry etching using gas having reactivity with silicon (Si) such as SF 6  (sulfur hexafluoride) is used in forming the recessed portion  55 . 
     Next, an insulation film  56  (for example, SiO 2 ) is layered on an inner wall of the recessed portion  55  (refer to  FIG. 11G ). With this, a substrate layered with the insulation film  56  is obtained. For example, chemical vapor deposition (CVD) is used for the insulation film  56 . Next, a region of the insulation film  56  corresponding to the bottom portion of the recessed portion  55  is subjected to the photolithography and thereafter patterned with a resist film  48  (refer to  FIG. 11H ), which is then removed through etching (refer to  FIG. 11I ). As a result, a state where the insulation film  56  is formed on the inner wall of the recessed portion  55  other than a region in contact with the common wire  54  is obtained. 
     Next, a barrier layer and a seed layer  70  are formed as films on the insulation film  56  through sputtering (refer to  FIG. 12A ). Next, patterning  72  is carried out using the photolithography in order to obtain the through electrode  58  by plating and filling (refer to  FIG. 12B ). Subsequently, the recessed portion  55  is plated and filled through Cu plating or the like, thereby forming the through electrode  58  (refer to  FIG. 12C ). 
     A solder mask  61  is patterned on a most surface on the rear surface side of the second silicon layer  53  with the insulation film  56 , the barrier layer along with the seed layer  70 , the through electrode  58 , and so forth interposed therebetween (refer to  FIG. 12D ). Next, a bump  62  is formed at a portion where the through electrode  58  is exposed (refer to  FIG. 12E ). 
     The aforementioned processes in  FIG. 11D  to  FIG. 11I ,  FIG. 12A  to  FIG. 12E  are implemented to carry out the process of processing the first substrate  32 A and then obtaining the photo detection layer  32 . 
     Next, a process of removing the supporting substrate  44  is carried out (refer to  FIG. 12F ). The layered body  80  is formed through this process. For example, UV light irradiation is used to remove the supporting substrate  44 . 
     Here, the supporting substrate  44  is bonded to the photo detection layer  32  with the first member  30  interposed therebetween. Accordingly, the occurrence of damage to the photo detection element  14  in the photo detection layer  32  and a crystal defect therein can be suppressed while the supporting substrate  44  is removed. 
     Next, the photodetector  10  is cut across the surrounding regions  11 B in the layered direction to be separated into the individual pixel regions  11 A through dicing (refer to  FIG. 12G ). At this state, the first member  30  is bonded to the surrounding region  11 B on the light incident surface  11  of the photo detection layer  32  in the photodetector  10  with the first adhesive layer  34 A interposed therebetween. 
     Next, the photo detection layer  32  is mounted on an arbitrary mounted substrate  36  with an electrode  63 , which is obtained through reflow or the like, interposed therebetween. As a result, the photo detection layer  32  and the mounted substrate  36  are electrically and mechanically connected to each other (refer to  FIG. 12H ). 
     Next, the second process is carried out. In detail, the light conversion member  18  is inserted into the through hole  30 A of the first member  30  and arranged so as to oppose the pixel region  11 A (refer to  FIG. 13 ). Specifically, a second adhesive layer  34 B is disposed on the pixel region  11 A in the photo detection layer  32 . Thereafter, the light conversion member  18  is inserted into the through hole  30 A and then, an end portion of the light conversion member  18  on an upstream side in an insertion direction is bonded to the second adhesive layer  34 B. For example, a thermosetting type adhesive is used for the second adhesive layer  34 B. Through this second process, the light conversion member  18  is arranged so as to oppose each of the pixel regions  11 A with the second adhesive layer  34 B interposed therebetween. 
     The first process and the second process described above are implemented to manufacture the photodetector  10 . 
     As described above, the method for manufacturing the photodetector  10  according to the embodiment includes the first process and the second process. The first process is a process of forming the layered body  80  (refer to  FIG. 12F ) in which the first member  30  protruding toward the opposite side of the light incident surface  11  is arranged on at least a portion of the surrounding region  11 B in the photo detection layer  32 . The second process is a process of arranging the light conversion member  18  such that the light conversion member  18  opposes each of pixel regions  11 A in the photo detection layer  32  with the adhesive layer  34  interposed therebetween (refer to  FIG. 13 ). 
     As described above, in the method for manufacturing the photodetector  10  according to the embodiment, after the layered body  80  in which the first member  30  is arranged on the photo detection layer  32  is formed, the light conversion member  18  is arranged so as to oppose the pixel region  11 A. Accordingly, the light conversion member  18  can be easily and accurately arranged so as to oppose the pixel region  11 A in the photo detection layer  32  with a simple configuration. In addition, the first member  30  is arranged on the photo detection layer  32  and thus, the improvement of the easiness in treating the photo detection layer  32  (handling property) during manufacturing can be achieved. 
     Consequently, the photodetector  10  manufactured using the method for manufacturing the photodetector  10  according to the embodiment can suppress the deterioration of the detection accuracy of the photo detection element  14 . 
     Meanwhile, in the method for manufacturing the photodetector  10  according to the embodiment, the first process includes the following processes. Specifically, first in the first process, a process of forming the first substrate  32 A is carried out (refer to  FIG. 11A ). Next, a process of arranging the first member  30  including the through hole  30 A corresponding to each of the pixel regions  11 A on the side of the light incident surface  11  of the first substrate  32 A is carried out (refer to  FIG. 11B ). Thereafter, a process of bonding the supporting substrate  44  on the side of the light incident surface  11  of the first substrate  32 A with the first member  30  interposed therebetween is carried out (refer to  FIG. 11D ). Subsequently, a process of obtaining the photo detection layer  32  by processing the first substrate  32 A is carried out (refer to  FIG. 11E  to  FIG. 11I  and  FIG. 12A  to  FIG. 12E ). Next, a process of removing the supporting substrate  44  is carried out (refer to  FIG. 12F ). 
     Furthermore, in the second process, a process of inserting the light conversion member  18  into the through hole  30 A of the first member  30  and arranging the light conversion member  18  such that the light conversion member  18  opposes each of the pixel regions  11 A with the adhesive layer  34  interposed therebetween is carried out (refer to  FIG. 13 ). These processes are implemented to manufacture the photodetector  10 . 
     As described above, in the method for manufacturing the photodetector  10  according to the embodiment, the supporting substrate  44  used for the reinforcement and the protection of the photo detection layer  32  during manufacturing is bonded to the photo detection layer  32  with the first member  30  interposed therebetween. Subsequently, the photo detection layer  32  is processed in a state where the supporting substrate  44  is bonded thereto. Thereafter, the supporting substrate  44  that has been bonded to the first member  30  is removed from the first member  30 . As a result, the occurrence of damage to the photo detection element  14  and a crystal defect therein can be suppressed while the supporting substrate  44  is removed. In addition, because it is not necessary to configure the photodetector  10  as including the supporting substrate  44 , the photodetector  10  in which the occurrence of crosstalk is suppressed can be manufactured. 
     Meanwhile, in the method for manufacturing the photodetector  10  according to the embodiment, the light conversion member  18  is inserted into the through hole  30 A of the first member  30  corresponding to the pixel region  11 A, whereby the light conversion member  18  is arranged so as to oppose the pixel region  11 A. As a result, the first member  30  functions as a guide when the light conversion member  18  is bonded. Accordingly, the light conversion member  18  can be easily and accurately arranged so as to oppose the pixel region  11 A in the photo detection layer  32  with a simple configuration. In addition, the improvement of the easiness in treating the photo detection layer  32  (handling property) during manufacturing can be achieved. 
     Consequently, the photodetector  10  manufactured using the method for manufacturing the photodetector  10  according to the embodiment can suppress the deterioration of the detection accuracy of the photo detection element  14 . 
     Third Embodiment 
     The second embodiment has described a case where the first member  30  including the through hole  30 A is arranged on the side of the light incident surface  11  of the first substrate  32 A (refer to  FIG. 11B ). 
     Alternatively, a through hole  30 A may be formed after a plate-shaped member having a plate shape, which is formed of a constituent material of a first member  30 , is arranged on a light incident surface  11  of a first substrate  32 A. 
     In this case, a process of forming a photo detection layer  32  is first carried out in the aforementioned first process. Subsequently, a process of bonding the plate-shaped member having a plate shape on the side of the light incident surface  11  of the photo detection layer  32  is carried out. The plate-shaped member is at least required to be a member having a plate shape and formed of a constituent material of the first member  30 . 
     Thereafter, the through hole  30 A is formed at a region of this plate-shaped member corresponding to each of the pixel regions  11 A, whereby the first member  30  is obtained. Dicing, wet etching, dry etching, sandblasting, and the like are used in forming the through hole  30 A. 
     In this case, the through hole  30 A is not limited to a shape passing through in the thickness direction and may be structured so as to be thinly maintained on the pixel region  11 A (for example, a layer thickness of 30 μm or less). 
     Subsequently, by inserting the light conversion member  18  into the through hole  30 A of the first member  30 , the light conversion member  18  is arranged so as to oppose each of the pixel regions  11 A in the photo detection layer  32 . 
     The photodetector  10  may be manufactured in this manner. 
     The photo detection layer  32  may be formed by processing the first substrate  32 A after the plate-shaped member is bonded to the first substrate  32 A. 
       FIG. 14A  to  FIG. 14C  are explanatory views for a method for manufacturing a photodetector  10  according to the embodiment. First, as in the second embodiment (refer to  FIG. 11A ), a process of forming the first substrate  32 A is carried out (refer to  FIG. 14A ). 
     Next, a process of bonding a plate-shaped member  30 B having a plate shape, which is formed of a constituent material of the first member  30 , on the side of the light incident surface  11  of the first substrate  32 A with a first adhesive layer  34 A interposed therebetween is carried out (refer to  FIG. 14B ). 
     Thereafter, a process of forming the through hole  30 A at a region of the plate-shaped member  30 B corresponding to each of the pixel regions  11 A to obtain the first member  30  is carried out (refer to  FIG. 14C ). 
     Following this, as in the second embodiment, a process of bonding a supporting substrate  44  on the side of the light incident surface  11  of the first substrate  32 A with the first member  30  interposed therebetween is carried out (refer to  FIG. 11D ). Subsequently, a process of obtaining the photo detection layer  32  by processing the first substrate  32 A is carried out (refer to  FIG. 11E  to  FIG. 11I  and  FIG. 12A  to  FIG. 12E ). Next, a process of removing the supporting substrate  44  is carried out (refer to  FIG. 12F ). Furthermore, as the second process, a process of inserting the light conversion member  18  into the through hole  30 A of the first member  30  and arranging the light conversion member  18  such that the light conversion member  18  opposes each of the pixel regions  11 A in the photo detection layer  32  is carried out (refer to  FIG. 13 ). With this, the photodetector  10  is manufactured. 
     As described above, the through hole  30 A may be formed after the plate-shaped member  30 B having a plate shape, which is formed of a constituent material of the first member  30 , is arranged on the light incident surface  11  of the first substrate  32 A. 
     Fourth Embodiment 
     In the embodiment, a different manufacturing method from that of the second embodiment for the photodetector  10  described in the first embodiment will be described. 
       FIG. 15A  to  FIG. 15I  and  FIG. 16A  to  FIG. 16H  are explanatory views for an example of a method for manufacturing a photodetector  10  according to the embodiment. Sections similar to those in the method for manufacturing the photodetector  10  described in the second embodiment will be denoted with similar reference numerals and the description thereof will be omitted. 
     First, multiple processes ( FIG. 15A  to  FIG. 15I ,  FIG. 16A  to  FIG. 16H ) are carried out as the first process. 
     As illustrated in  FIG. 15A , a publicly known CMOS process is used first to carry out a process of forming, on a light incident surface  11 , a first substrate  32 A including a pixel region  11 A and a surrounding region  11 B. This process is similar to the process illustrated in  FIG. 11A . 
     Next, as illustrated in  FIG. 15B , a second member  310  provided with through holes  30 A having shapes similar to those of the pixel regions  11 A at regions corresponding to some of the plurality of pixel regions  11 A is prepared. 
     The second member  310  is a member to be configured as a first member  30  through a process described later. For this reason, the second member  310  is made of a material similar to that of the first member  30 . In addition, a method for forming the through hole  30 A is similar to that of the second embodiment. 
     The second member  310  is provided with the through holes  30 A at regions corresponding to some of the plurality of pixel regions  11 A in the first substrate  32 A. In other words, the second member  310  does not have the through holes  30 A at regions corresponding to some of the plurality of pixel regions  11 A in the first substrate  32 A. Accordingly, when the second member  310  is bonded to the first substrate  32 A, a bonding area of the second member  310  to the first substrate  32 A is larger than the case of the first member  30 . 
     Next, a process of arranging the second member  310  on the light incident surface  11  of the first substrate  32 A with a first adhesive layer  34 A interposed therebetween is carried out (refer to  FIG. 15B ). 
     Thereafter, a process of bonding a supporting substrate  44  on the side of the light incident surface  11  of the first substrate  32 A with the second member  310  and an adhesive layer  42  interposed therebetween is carried out (refer to  FIG. 15C ). 
     Subsequently, a process of obtaining a photo detection layer  32  by processing the first substrate  32 A is carried out (refer to  FIG. 15D  to  FIG. 15I  and  FIG. 16A  to  FIG. 16E ). This process is similar to the process described in the second embodiment with reference to  FIG. 11D  to  FIG. 11I  and  FIG. 12A  to  FIG. 12E . 
     Next, a process of removing the supporting substrate  44  is carried out (refer to  FIG. 16F ). For example, UV light irradiation is used to remove the supporting substrate  44 . 
     Here, the supporting substrate  44  is bonded to the photo detection layer  32  with the second member  310  interposed therebetween. In the case of the second member  310 , the smaller number of the through holes  30 A is formed than the case of the first member  30 . Accordingly, compared to the case of the first member  30 , a large bonding area to the side of the photo detection layer  32  with the first adhesive layer  34 A interposed therebetween is obtained in the case of the second member  310 . As a result, in the method for manufacturing the photodetector  10  according to the embodiment, the occurrence of damage to the photo detection element  14  in the photo detection layer  32  and a crystal defect therein can be further suppressed while the supporting substrate  44  is removed. 
     Next, by cutting at the surrounding regions  11 B in the layered direction, the separation into the individual pixel regions  11 A is carried out through dicing (refer to  FIG. 16G ). 
     Thereafter, the photo detection element for which the through hole  30 A is formed, that is, the photo detection element for which an aperture is formed on top of the photo detection layer  32  is selected to be mounted on a mounted substrate  36  (refer to  FIG. 16H ). When mounted, the elements are arrayed in a matrix form on the mounted substrate  36 . Because the through hole  30 A is formed, the first member  30  can be bonded to the surrounding region  11 B on the light incident surface  11  of the photo detection layer  32  in the photodetector  10  with the first adhesive layer  34 A interposed therebetween. 
     Next, the photo detection layer  32  is mounted on an arbitrary mounted substrate  36  with an electrode  63 , which is obtained through reflow or the like, interposed therebetween. As a result, the photo detection layer  32  and the mounted substrate  36  are electrically and mechanically connected to each other (refer to  FIG. 16H ). 
     Furthermore, as the second process, the light conversion member  18  is inserted into the through hole  30 A of the first member  30  and the light conversion member  18  is arranged so as to oppose the pixel region  11 A (refer to  FIG. 13 ). The second process of arranging the light conversion member  18  is similar to that of the second embodiment. 
     As described thus far, in the first process of the method for manufacturing the photodetector  10  according to the embodiment, a process of forming the first substrate  32 A is first carried out (refer to  FIG. 15A ). Next, a process of arranging, on the light incident surface  11  of the first substrate  32 A, the second member  310  including the through holes  30 A at regions corresponding to some of the plurality of pixel regions  11 A is carried out (refer to  FIG. 15B ). Thereafter, a process of bonding the supporting substrate  44  on the side of the light incident surface  11  of the first substrate  32 A with the second member  310  interposed therebetween is carried out (refer to  FIG. 15D ). Subsequently, a process of obtaining the photo detection layer  32  by processing the first substrate  32 A is carried out (refer to  FIG. 15E  to  FIG. 15I  and  FIG. 16A  to  FIG. 16E ). Next, a process of removing the supporting substrate  44  is carried out (refer to  FIG. 16F ). Following this, a process of forming the through hole  30 A at a region of the second member  310  where no through hole  30 A corresponding to the pixel region  11 A is present and thereby obtaining the first member  30  is carried out (refer to  FIG. 16H ). 
     Furthermore, as the second process, a process of inserting the light conversion member  18  into the through hole  30 A of the first member  30  and arranging the light conversion member  18  such that the light conversion member  18  opposes each of the pixel regions  11 A in the photo detection layer  32  with the adhesive layer  34  interposed therebetween is carried out (refer to  FIG. 13 ). These processes are implemented to manufacture the photodetector  10 . 
     As described above, in the method for manufacturing the photodetector  10  according to the embodiment, the second member  310  is arranged on the light incident surface  11  of the first substrate  32 A. The second member  310  includes the through holes  30 A at regions corresponding to some of the plurality of pixel regions  11 A. Thereafter, the supporting substrate  44  is bonded to the second member  310  and, after the photo detection layer  32  is processed, the supporting substrate  44  is removed from the second member  310 . 
     In this manner, the embodiment uses the second member  310  having a larger bonding area to the side of the photo detection layer  32  than that of the first member  30 . As a result, in the method for manufacturing the photodetector  10  according to the embodiment, the occurrence of damage to the photo detection element  14  and a crystal defect therein can be further suppressed than the case of the second embodiment while the supporting substrate  44  is removed. In addition, the further improvement of the easiness in treating the photo detection layer  32  (handling property) during manufacturing can be achieved. 
     Meanwhile, compared to the case of the first member  30 , the second member  310  has a large bonding area to the side of the photo detection layer  32 . As a result, the generation of a warp in the photo detection layer  32  can be suppressed by implementing the manufacturing process, whereby the enhancement of the flatness of the photo detection layer  32  can be achieved. 
     In the embodiment, the through hole  30 A has been formed at a region of the second member  310  where no through hole  30 A corresponding to the pixel region  11 A is formed (refer to  FIG. 16H ). However, the through hole  30 A may not be formed in this region of the second member  310 . In this case, at a state after the separation into the individual pixel regions  11 A is carried out, the photo detection layer  32  provided with the second member  310  for which the through hole  30 A is not formed is simply excluded from the object on which the light conversion member  18  is to be mounted. 
     Fifth Embodiment 
     Each of the aforementioned second to fourth embodiments has described a case including the process of removing the supporting substrate  44  during the manufacturing process. However, the embodiment does not include a process of removing a supporting substrate  44 . 
       FIG. 17A  and  FIG. 17B  are explanatory views for a method for manufacturing a photodetector  10 E according to the embodiment (refer to  FIG. 18 ). 
     First, as in the second embodiment, the first process is carried out. Specifically, a process of forming a first substrate  32 A is first carried out (refer to  FIG. 11A ). Next, a process of arranging a first member  30  including a through hole  30 A on a light incident surface  11  of the first substrate  32 A is carried out (refer to  FIG. 11B ). Thereafter, a process of bonding the supporting substrate  44  on the side of the light incident surface  11  of the first substrate  32 A with the first member  30  interposed therebetween is carried out (refer to  FIG. 11D ). Subsequently, a process of obtaining a photo detection layer  32  by processing the first substrate  32 A is carried out (refer to  FIG. 11E  to  FIG. 11I  and  FIG. 12A  to  FIG. 12E ). 
     Following this, as illustrated in  FIG. 17A , a layered body  82  is obtained by layering a first adhesive layer  34 A, the first member  30 , an adhesive layer  42 , and the supporting substrate  44  on the photo detection layer  32  in this order. Next, a process of cutting this layered body  82  such that a pixel region  11 A and a surrounding region  11 B are separated from each other is carried out (refer to  FIG. 17B ). 
     For example, this cutting is carried out through dicing. In detail, after a dicing tape is affixed on the supporting substrate  44 , the dicing is carried out from the side of the photo detection layer  32  in the layered body  82 . 
     Here, the first member  30  is bonded on the surrounding region  11 B. Accordingly, when this process of cutting is carried out, a state where the first member  30  is separated from the pixel region  11 A is obtained. Additionally, because the supporting substrate  44  is bonded to the first member  30 , a state where the supporting substrate  44  is separated from the photo detection layer  32  is obtained when this process of cutting is carried out. As a result, a state where the first member  30  and the supporting substrate  44  are separated from the photo detection layer  32  is obtained. 
     Furthermore, as the second process, a process of arranging a light conversion member  18  such that the light conversion member  18  opposes each of the pixel regions  11 A in the photo detection layer  32  is carried out (refer to  FIG. 18 ).  FIG. 18  is an explanatory view for the photodetector  10 E. These processes are implemented to manufacture the photodetector  10 E. 
     As described above, the embodiment does not include the process of removing the supporting substrate  44  while the photodetector  10 E is formed. As a result, the occurrence of damage to the photo detection element  14  and a crystal defect therein can be suppressed while the supporting substrate  44  is removed. In addition, because it is not necessary to configure the photodetector  10  as including the supporting substrate  44 , the occurrence of crosstalk can be suppressed. 
     Consequently, the photodetector  10 E manufactured using the method for manufacturing the photodetector  10 E according to the embodiment can suppress the deterioration of the detection accuracy of the photo detection element  14 . 
     While certain embodiments have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the inventions. Indeed, the novel embodiments described herein may be embodied in a variety of other forms; furthermore, various omissions, substitutions and changes in the form of the embodiments described herein may be made without departing from the spirit of the inventions. The accompanying claims and their equivalents are intended to cover such forms or modifications as would fall within the scope and spirit of the inventions.