Patent Publication Number: US-11644581-B2

Title: Radiation detector and method for manufacturing radiation detector

Description:
TECHNICAL FIELD 
     The present invention relates to a radiation detector and a method for manufacturing a radiation detector. 
     BACKGROUND ART 
     Radiation detectors are disclosed in Patent Literature 1, Patent Literature 2, and Patent Literature 3. Each of the radiation detectors disclosed in Patent Literature 1, Patent Literature 2, and Patent Literature 3 has a scintillator layer converting radiation into light and a photodetection panel detecting light. The photodetector panel has a light receiving portion where a plurality of light receiving elements are disposed and a plurality of bonding pads provided around the light receiving portion and electrically connected to the light receiving portion. A resin frame surrounding the light receiving portion is formed between the light receiving portion and the bonding pad. The scintillator layer is covered with a moisture-resistant protective film. 
     CITATION LIST 
     Patent Literature 
     Patent Literature 1: Japanese Unexamined Patent Publication No. 2015-96823 
     Patent Literature 2: Japanese Unexamined Patent Publication No. 2016-205916 
     Patent Literature 3: U.S. Patent No. 2012/0288688 
     SUMMARY OF INVENTION 
     Technical Problem 
     In the method for manufacturing the radiation detectors disclosed in Patent Literature 1 and Patent Literature 2, the resin frame is formed after the scintillator layer is formed on the photodetection panel. The protective film is formed next. The protective film is formed on the scintillator layer and the bonding pad. The protective film may cover the scintillator layer. In this regard, the protective film covering the bonding pad is removed in part. Specifically, the protective film on the resin frame is cut by irradiation with a laser beam so that the protective film is cut. In other words, the protective film and the resin frame are irradiated bodies on which laser beam irradiation is performed. 
     The mode of laser beam irradiation may have a slight difference between preset content and actual operation. Then, unintended resin frame cutting may occur in the actual operation even in the case of setting for cutting the protective film without cutting the resin frame. 
     In this regard, an object of the present invention is to provide a radiation detector and a radiation detector manufacturing method suppressing the occurrence of unintended cutting of an irradiated object. 
     Solution to Problem 
     A radiation detector according to one embodiment of the present invention includes: a photodetection panel having a light receiving portion including a plurality of photoelectric conversion elements arranged one-dimensionally or two-dimensionally and a plurality of bonding pads electrically connected to the photoelectric conversion elements and disposed outside the light receiving portion; a scintillator layer laminated on the photodetection panel so as to cover the light receiving portion and converting radiation into light; a panel protection portion formed on the photodetection panel so as to pass between the scintillator layer and the bonding pad and surround the scintillator layer apart from the scintillator layer and the bonding pad when viewed in a lamination direction of the scintillator layer; and a scintillator protective film covering the scintillator layer and having an outer edge positioned on the panel protection portion. A groove continuous with the outer edge of the scintillator protective film is formed in the panel protection portion. The groove includes: a pre-irradiation portion formed by performing scanning along the panel protection portion while increasing energy of a laser beam to a value larger than threshold energy from a value smaller than the threshold energy at which the scintillator protective film can be cut; a main irradiation portion formed by performing scanning along the panel protection portion while maintaining the energy of the laser beam at a value larger than the threshold energy; and a post-irradiation portion formed by performing scanning along the panel protection portion while decreasing the energy of the laser beam from a value larger than the threshold energy to a value smaller than the threshold energy. 
     The groove of the panel protection portion of the radiation detector is continuous with the outer edge of the scintillator protective film. Accordingly, the groove is formed as the outer edge of the scintillator protective film is formed by laser beam irradiation. When the groove is formed in the panel protection portion, the scintillator protective film formed on the panel protection portion is cut in a reliable manner. In the pre-irradiation portion, irradiation is started from the energy smaller than the threshold energy. According to such an irradiation mode, laser beam irradiation can be started with a margin with respect to the energy required for cutting the panel protection portion. Accordingly, even if energy exceeding a set value is supplied due to an unintended factor at the initiation of the laser beam irradiation, cutting of the panel protection portion can be suppressed by the ensured margin. Likewise, in the post-irradiation portion, irradiation is stopped after the energy is decreased to the energy smaller than the threshold energy. According to such an irradiation mode, laser beam irradiation can be stopped with a margin with respect to the energy required for cutting the panel protection portion. Accordingly, even if energy exceeding a set value is supplied due to an unintended factor when the laser beam irradiation is stopped, cutting of the panel protection portion can be suppressed by the ensured margin. Accordingly, the occurrence of unintended cutting of the panel protection portion as an irradiated object can be suppressed. 
     The radiation detector may further include a coating resin covering the outer edge of the scintillator protective film. According to this configuration, the occurrence of peeling of the scintillator protective film can be suppressed. 
     The coating resin of the radiation detector may further cover the panel protection portion. The coating resin may have a material property allowing the coating resin to stay on the panel protection portion such that an edge portion of a contact surface between the coating resin and the panel protection portion is formed on the panel protection portion. According to this configuration, the coating resin reaches neither the surface of the photodetection panel positioned outside the panel protection portion nor the bonding pad. Accordingly, each of the surface of the photodetection panel and the bonding pad can be kept clean. 
     In the radiation detector, a middle portion of the panel protection portion may be higher than both edge portions of the panel protection portion. According to this configuration, the coating resin is capable of covering the outer edge of the scintillator protective film in a reliable manner. 
     In the radiation detector, a width of the panel protection portion may be 700 μm or more to 1000 μm or less. According to this configuration, the radiation detector can be reduced in size. 
     In the radiation detector, a height of the panel protection portion may be 100 μm or more to 300 μm or less. According to this configuration, the radiation detector can be reduced in size. 
     A radiation detector manufacturing method according to another embodiment of the present invention includes: a step of preparing a photodetection panel having a light receiving portion including a plurality of photoelectric conversion elements arranged one-dimensionally or two-dimensionally and a plurality of bonding pads electrically connected to the photoelectric conversion elements and disposed outside the light receiving portion and laminating a scintillator layer converting radiation into light on the photodetection panel so as to cover the light receiving portion; a step of disposing a panel protection portion on the photodetection panel so as to surround the scintillator layer when viewed in a lamination direction of the scintillator layer; a step of forming a scintillator protective film so as to cover an entire surface of the photodetection panel on a side where the scintillator layer is laminated and a surface of the panel protection portion; a step of cutting the scintillator protective film by performing irradiation with a laser beam along the panel protection portion; and a step of removing an outside part of the scintillator protective film. The step of cutting the scintillator protective film includes: a pre-irradiation step of performing scanning along the panel protection portion while increasing energy of the laser beam to a value larger than threshold energy from a value smaller than the threshold energy at which the scintillator protective film can be cut; a main irradiation step of performing scanning along the panel protection portion while maintaining the energy of the laser beam at a value larger than the threshold energy; and a post-irradiation step of performing scanning along the panel protection portion while decreasing the energy of the laser beam from a value larger than the threshold energy to a value smaller than the threshold energy. 
     In the radiation detector manufacturing method, the outer edge of the scintillator protective film and the groove of the panel protection portion are formed in the step of cutting the scintillator protective film. When the groove is formed in the panel protection portion, the scintillator protective film formed on the panel protection portion is cut in a reliable manner. Further, the groove is formed as a result of the pre-irradiation step of forming the groove while increasing the energy and the post-irradiation step of forming the groove while decreasing the energy. According to these steps, the depth of the groove does not excessively increase. Accordingly, the occurrence of unintended cutting of the panel protection portion as an irradiated object can be suppressed. 
     In the radiation detector manufacturing method according to another embodiment, the panel protection portion may include a resin frame. In the step of disposing the panel protection portion, the resin frame may be disposed on the photodetection panel so as to pass between the scintillator layer and the bonding pad and surround the scintillator layer apart from the scintillator layer and the bonding pad. According to this step, a radiation detector having the resin frame can be manufactured. 
     In the radiation detector manufacturing method according to another embodiment, the panel protection portion may further include a masking member. In the step of disposing the panel protection portion, the masking member may be further disposed on the photodetection panel so as to cover the bonding pad. According to this step, the bonding pad can be suitably protected. 
     In the radiation detector manufacturing method according to another embodiment, the panel protection portion may include a masking member. In the step of disposing the panel protection portion, the masking member may be disposed on the photodetection panel so as to cover a region between the scintillator layer and the bonding pad and the bonding pad. In the step of forming the scintillator protective film, the scintillator protective film may be formed on the entire surface of the photodetection panel on the side where the scintillator layer is laminated and a surface of the masking member. According to this step, a radiation detector without the resin frame can be manufactured. In other words, the distance between the scintillator layer and the bonding pad can be reduced. As a result, the radiation detector can be further reduced in size. 
     The radiation detector manufacturing method according to another embodiment may further include a step of removing the masking member after the step of cutting the scintillator protective film. According to this step, the radiation detector without the resin frame can be manufactured in a suitable manner. 
     The radiation detector manufacturing method according to another embodiment may further include a step of forming a coating resin covering an outer edge of the scintillator protective film after the step of removing the outside part of the scintillator protective film. According to this step, the occurrence of peeling of the outer edge of the scintillator protective film can be further suppressed. 
     Advantageous Effects of Invention 
     According to the present invention, a radiation detector and a radiation detector manufacturing method suppressing the occurrence of unintended cutting of an irradiated object are provided. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG.  1    is a plan view of a radiation detector of a first embodiment. 
         FIG.  2    is a cross-sectional view taken along line II-II of  FIG.  1   . 
         FIG.  3    is an enlarged plan view illustrating the vicinity of a corner portion of the radiation detector of  FIG.  1   . 
         FIG.  4 ( a )  is a cross-sectional view illustrating a state where a scintillator layer is yet to be formed.  FIG.  4 ( b )  is a cross-sectional view illustrating a state where the scintillator layer is formed. 
         FIG.  5 ( a )  is a cross-sectional view illustrating a state where a resin frame is formed.  FIG.  5 ( b )  is a cross-sectional view illustrating a state where a first organic film is formed. 
         FIG.  6 ( a )  is a cross-sectional view illustrating a state where an inorganic film is formed.  FIG.  6 ( b )  is a cross-sectional view illustrating a state where a second organic film is formed. 
         FIG.  7    is a cross-sectional view illustrating laser beam processing. 
         FIG.  8    is a graph schematically showing a time history of energy received by an irradiated body. 
         FIG.  9 ( a )  is a cross-sectional view illustrating a pre-irradiation portion.  FIG.  9 ( b )  is a cross-sectional view illustrating the pre-irradiation portion and a main irradiation portion.  FIG.  9 ( c )  is a cross-sectional view illustrating the pre-irradiation portion, the main irradiation portion, and a post-irradiation portion. 
         FIG.  10 ( a )  is a cross-sectional view for describing a step of forming the post-irradiation portion.  FIG.  10 ( b )  is a cross-sectional view for describing a step of forming the post-irradiation portion following  FIG.  10 ( a ) . 
         FIG.  11 ( a )  is a graph showing an example of a time history of the speed of a laser beam head.  FIG.  11 ( b )  is a graph showing an example of a time history of the energy of a laser beam emitted from the laser beam head.  FIG.  11 ( c )  is a graph showing an example of a time history of the focal position of the laser beam emitted from the laser beam head. 
         FIG.  12 ( a )  is a graph showing an example of the time history of the speed of the laser beam head.  FIG.  12 ( b )  is a diagram schematically illustrating the positional relationship between the laser beam head and a protective film and the resin frame. 
         FIG.  13 ( a )  is a cross-sectional view illustrating a state where a part of the protective film is removed.  FIG.  13 ( b )  is a cross-sectional view illustrating a state where a coating resin is formed. 
         FIG.  14 ( a )  is a graph schematically showing the time history of the energy received by the irradiated body.  FIG.  14 ( b )  is a graph schematically showing the time history of the speed of the laser beam head. 
         FIG.  15    is a plan view of a radiation detector of a second embodiment. 
         FIG.  16    is a cross-sectional view taken along line XVI-XVI of  FIG.  15   . 
         FIG.  17    is a first perspective view of the radiation detector of  FIG.  15   . 
         FIG.  18    is a second perspective view of the radiation detector of  FIG.  15   . 
         FIG.  19 ( a )  is a cross-sectional view illustrating a state where a scintillator layer is yet to be formed.  FIG.  19 ( b )  is a cross-sectional view illustrating a state where the scintillator layer is formed. 
         FIG.  20 ( a )  is a cross-sectional view illustrating a state where a masking member is disposed.  FIG.  20 ( b )  is a cross-sectional view illustrating a state where the first organic film is formed. 
         FIG.  21 ( a )  is a cross-sectional view illustrating a state where the inorganic film is formed.  FIG.  21 ( b )  is a cross-sectional view illustrating a state where the second organic film is formed. 
         FIG.  22 ( a )  is a cross-sectional view illustrating laser beam processing.  FIG.  22 ( b )  is a cross-sectional view illustrating masking member removal processing. 
         FIG.  23    is a cross-sectional view illustrating a state where the masking member is removed. 
         FIG.  24    is a cross-sectional view illustrating a radiation detector according to a modification example of the second embodiment. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements are denoted by the same reference numerals with redundant description omitted. 
     The configuration of a radiation detector  1  according to the present embodiment will be described with reference to  FIGS.  1  and  2   . As illustrated in  FIGS.  1  and  2   , the radiation detector  1  includes a photoelectric conversion element array  7  (photodetection panel), a scintillator layer  8 , a resin frame  9 , a protective film  13  (scintillator protective film), and a coating resin  14  (coating resin). The photoelectric conversion element array  7  has a substrate  2 , a light receiving portion  3 , a signal line  4 , a bonding pad  5 , and a passivation film  6 . The protective film  13  has a first organic film  10 , an inorganic film  11  (metal film), and a second organic film  12 . 
     The light receiving portion  3  includes a plurality of photoelectric conversion elements  3   a . The plurality of photoelectric conversion elements  3   a  are two-dimensionally arranged in the rectangular region in the middle portion of the insulating substrate  2 . The substrate  2  is, for example, a glass substrate. The photoelectric conversion element  3   a  is configured by, for example, a photodiode (PD) or a thin film transistor (TFT) made of amorphous silicon. The photoelectric conversion element  3   a  in each row or the photoelectric conversion element  3   a  in each column included in the light receiving portion  3  is electrically connected to the bonding pad  5  for extracting a signal to an external circuit (not illustrated) by the signal line  4  for reading a signal. 
     A plurality of the bonding pads  5  are disposed at predetermined intervals along two adjacent sides of the outer edge of the substrate  2 . The two adjacent sides are, for example, the upper side and the right side in  FIG.  1   . The bonding pad  5  is electrically connected to the corresponding photoelectric conversion element  3   a  via the signal line  4 . The insulating passivation film  6  is formed on the photoelectric conversion element  3   a  and the signal line  4 . Silicon nitride, silicon oxide, or the like can be used for the passivation film  6 . The bonding pad  5  is exposed for connection to the external circuit. 
     A scintillator  8   a  has a columnar structure and converts X-rays, which are radiation, into light. The scintillator  8   a  is laminated on the photoelectric conversion element array  7  so as to cover the light receiving portion  3 . The scintillator layer  8  is formed by the scintillator  8   a . A plurality of the scintillators  8   a  are laminated in the substantially rectangular region that includes the light receiving portion  3  in the photoelectric conversion element array  7 . The substantially rectangular region is surrounded by the dashed line illustrated in  FIG.  1   . Various materials can be used for the scintillator  8   a . For example, cesium iodide (CsI) doped with thallium (Tl) with satisfactory luminous efficiency can be used for scintillator  8   a.    
     A peripheral edge portion  8   b  of the scintillator layer  8  has a gradient shape. In other words, the height of the peripheral edge portion  8   b  gradually decreases toward the outside of the scintillator layer  8 . In other words, as for the peripheral edge portion  8   b , the scintillator  8   a  formed on the outside of the scintillator layer  8  is lower in height. The peripheral edge portion  8   b  is a region where the light receiving portion  3  is not formed below. The region where the light receiving portion  3  is not formed is a region outside an effective screen. The peripheral edge portion  8   b  is a region that has little effect on X-ray image generation. Accordingly, with the gradient-shaped peripheral edge portion  8   b , it is possible to limit the region on the scintillator layer  8  that is adversely affected by a laser beam during manufacturing. The gradient angle of the peripheral edge portion  8   b  (angle θ) is defined. Defined first is a straight line connecting the height positions of the scintillators  8   a  formed in the peripheral edge portion  8   b  from the inside toward the outside of the scintillator layer  8 . This straight line forms the angle θ with respect to the upper surface of the substrate  2 . The angle θ is in the range of 20 degrees or more to 80 degrees or less. 
     The resin frame  9  is formed on the photoelectric conversion element array  7 . The resin frame  9  passes between the scintillator layer  8  and the bonding pad  5  and surrounds the scintillator layer  8  when viewed in a lamination direction A of the scintillator layer  8 . The corner portion of the resin frame  9  has an arc shape that is convex to the outside. The resin frame  9  is, for example, a silicone resin. It can be said that the shape of the corner portion of the resin frame  9  is a so-called R shape. 
     The middle portion of the resin frame  9  is higher than both edge portions of the resin frame  9 . A height d 1  of the resin frame  9  is lower than a height d of the scintillator layer  8 . As a result, the resin frame  9  can be reduced in size. Further, the adverse effect of a laser beam on the scintillator layer  8  can be suppressed during manufacturing. The height d 1  of the resin frame  9  is the distance from the position of the upper surface of the photoelectric conversion element array  7  to the position of the apex of the resin frame  9 . The height d of the scintillator layer  8  is the maximum height of the scintillator  8   a  included in the scintillator layer  8 . 
     From the viewpoint of reducing the size of the radiation detector  1 , it is preferable that the resin frame  9  is as small as possible. More specifically, the height d 1  of the resin frame  9  is 100 μm or more to 300 μm or less. Further, a width d 2  of the resin frame  9  is 700 μm or more to 1000 μm or less. The width d 2  of the resin frame  9  is the width between an inner edge E 1  of the resin frame  9  and an outer edge E 2  of the resin frame  9 . The inner edge E 1  is an edge portion on the scintillator layer  8  side. The outer edge E 2  is an edge portion on the bonding pad  5  side. 
     The distance from the inner edge E 1  of the resin frame  9  to an outer edge E 3  of the scintillator layer  8  is a first distance D 1 . The distance from the outer edge E 2  of the resin frame  9  to an outer edge E 4  of the photoelectric conversion element array  7  is a second distance D 2 . The first distance D 1  is shorter than the second distance D 2 . The ratio of the second distance D 2  to the first distance D 1  is preferably 5 or more from the viewpoint of suppressing the adverse effect of a laser beam on the bonding pad  5  during manufacturing and ensuring the effective area of the scintillator layer  8 . More specifically, the first distance D 1  is preferably 1 mm or less. The second distance D 2  is preferably 5 mm or more. This is because of the following reasons. 
     The effective area of the scintillator layer  8  can be maximized when no gap is provided between the outer edge E 3  of the scintillator layer  8  and the inner edge E 1  of the resin frame  9 . However, it is conceivable that the scintillator layer  8  is adversely affected by a laser beam during manufacturing. In addition, a slight failure may arise in the process of forming the resin frame  9 . The slight failure can be exemplified by, for example, forming the resin frame  9  on the scintillator layer  8 . Considering these, it is preferable to set the first distance D 1  in the range of 1 mm or less. The second distance D 2  is set in the range of 5 mm or more. As a result, the adverse effect of a laser beam on the bonding pad  5  during manufacturing is taken into consideration, and thus a sufficient distance can be ensured between the resin frame  9  and the bonding pad  5 . 
     The scintillator layer  8  is covered with the protective film  13 . The protective film  13  has the first organic film  10 , the inorganic film  11 , and the second organic film  12 . These films are laminated from the scintillator layer  8  side in this order. Each of the first organic film  10 , the inorganic film  11 , and the second organic film  12  transmits X-rays, which are radiation. In addition, the first organic film  10 , the inorganic film  11 , and the second organic film  12  block water vapor. Specifically, a polyparaxylylene resin, polyparachloroxylylene, or the like can be used for the first organic film  10  and the second organic film  12 . The inorganic film  11  may be transparent, opaque, or reflective with respect to light. An oxide film such as silicon (Si), titanium (Ti), and chromium (Cr), a metal film such as gold, silver, and aluminum (Al), or the like can be used for the inorganic film  11 . For example, the inorganic film  11  that uses a metal film reflecting light is capable of preventing leakage of fluorescence generated by the scintillator  8   a . As a result, the detection sensitivity of the radiation detector  1  is improved. Described in the present embodiment is an example in which aluminum (Al), which is easy to mold, is used as the inorganic film  11 . Aluminum (Al) is easy to corrode in the air. However, the inorganic film  11  is sandwiched between the first organic film  10  and the second organic film  12 . Accordingly, the inorganic film  11  that uses aluminum (Al) is protected from corrosion. 
     The protective film  13  is formed by, for example, a CVD method. Accordingly, immediately after the protective film  13  is formed, the protective film  13  covers the entire surface of the photoelectric conversion element array  7 . Accordingly, in order to expose the bonding pad  5 , the protective film  13  is cut at a position inside the bonding pad  5  of the photoelectric conversion element array  7 . In the protective film  13 , the part outside the cutting position is removed. As will be described later, the protective film  13  is cut by a laser beam in the vicinity of the outside of the middle portion of the resin frame  9  and an outer edge  13   a  of the protective film  13  is fixed by the resin frame  9 . As a result, it is possible to prevent the protective film  13  from peeling off from the outer edge  13   a . The carbon dioxide laser (CO 2  laser) or the like may be used in cutting the protective film  13 . The protective film  13  can be cut with a single scan by means of the carbon dioxide laser. In other words, the protective film  13  can be cut in a short time. As a result, productivity is improved. In addition, an ultrashort pulse semiconductor laser on the order of nanoseconds or picoseconds or the like may be used in cutting the protective film  13 . It should be noted that the adverse effects on the photoelectric conversion element array  7 , the bonding pad  5 , the scintillator layer  8 , and so on can be exemplified by thermal damage when, for example, the carbon dioxide laser or an ultrashort pulse laser is used. 
     The outer edge  13   a  of the protective film  13  is positioned on the resin frame  9 . The outer edge  13   a  is coated with the coating resin  14  together with the resin frame  9 . The coating resin  14  is disposed along the resin frame  9 . A resin that is satisfactorily adhesive with respect to the protective film  13  and the resin frame  9  may be used for the coating resin  14 . For example, an acrylic adhesive or the like can be used for the coating resin  14 . The same silicone resin as the resin frame  9  may be used for the coating resin  14 . The same acrylic resin as the coating resin  14  may be used for the resin frame  9 . 
     Next, the corner portions (corner parts) of the resin frame  9  and the protective film  13  will be described with reference to  FIG.  3   . In  FIG.  3   , the coating resin  14  is partially illustrated such that the states of the corner portions of the resin frame  9  and the protective film  13  are understood with ease. 
     As will be described in detail later, the protective film  13  on the resin frame  9  is irradiated with a laser beam in the process of manufacturing the radiation detector  1 . As a result, the part of the protective film  13  irradiated with the laser beam is cut. The protective film  13  is very thin. Accordingly, a part of the resin frame  9  is also cut by the laser beam of the carbon dioxide laser. As a result, a groove  30  as a corresponding region is formed near the middle of the resin frame  9 . The outer edge  13   a  of the protective film  13  in the resin frame  9  is in a state of being processed by the laser beam. In addition, the groove  30  is also in a state of being processed by the laser beam. Here, a depth (height) d 3  of the groove  30  is one-third or less of the height d 1  of the resin frame  9 . Suppressed as a result is the adverse effect of the laser beam on the photoelectric conversion element array  7  positioned below the resin frame  9 . 
     As illustrated in  FIG.  3   , the outer edge  13   a  of the protective film  13  and the groove  30  processed by the laser beam have a substantially rectangular ring shape having an arcuate corner portion convex to the outside when viewed in the lamination direction A of the scintillator layer  8 . The arcuate corner portion is illustrated in a region B illustrated in  FIG.  3   . The outer edge  13   a  of the protective film  13  and the surface of the groove  30  have a fine wave shape when viewed in the lamination direction A. The outer edge  13   a  of the protective film  13  and the surface of the groove  30  are different in shape from a flat cut surface formed by an edged tool such as a cutter. The outer edge  13   a  of the protective film  13  and the surface of the groove  30  have minute irregularities. As a result, the area of mutual contact between the outer edge  13   a  of the protective film  13  and the coating resin  14  increases. Accordingly, the coating resin  14  is capable of adhering more firmly to the outer edge  13   a  of the protective film  13 . In addition, the area of mutual contact between the groove  30  and the coating resin  14  also increases. Accordingly, the coating resin  14  is also capable of adhering more firmly to the groove  30 . 
     As illustrated in  FIG.  1   , the groove  30  provided in the resin frame  9  includes three parts depending on the step of forming the groove  30 . Specifically, the groove  30  includes a pre-irradiation portion Rs, a main irradiation portion Ra, and a post-irradiation portion Re. The pre-irradiation portion Rs and the post-irradiation portion Re overlap in an overlapping region  31 . Details of the pre-irradiation portion Rs, the main irradiation portion Ra, and the post-irradiation portion Re will be described later. 
     The operation of the radiation detector  1  according to the present embodiment will be described. X-rays (radiation) incident from an incident surface reach the scintillator  8   a  after transmission through the protective film  13 . The X-rays are absorbed by the scintillator  8   a . The scintillator  8   a  emits light proportional to the dose of the absorbed X-rays. The light that has been emitted and travels in the direction opposite to the incident direction of the X-rays is reflected by the inorganic film  11 . As a result, almost all the light generated by the scintillator  8   a  is incident on the photoelectric conversion element  3   a  via the passivation film  6 . The photoelectric conversion element  3   a  generates an electric signal corresponding to the amount of the incident light by photoelectric conversion. The electric signal is accumulated over a certain period of time. The amount of the light corresponds to the dose of the incident X-rays. In other words, the electric signal accumulated in the photoelectric conversion element  3   a  corresponds to the dose of the incident X-rays. Accordingly, an image signal corresponding to an X-ray image is obtained by means of this electric signal. The image signals accumulated in the photoelectric conversion element  3   a  are sequentially read from the bonding pad  5  via the signal line  4 . The read image signal is transferred to the outside. The transferred image signal is processed by a predetermined processing circuit. As a result, the X-ray image is displayed. 
     &lt;Method for Manufacturing Radiation Detector&gt; 
     Next, a method for manufacturing the radiation detector  1  according to the present embodiment will be described with reference to  FIGS.  4  to  13   . First, the photoelectric conversion element array  7  is prepared as illustrated in  FIG.  4 ( a )  (Step S 1 ). Subsequently, the scintillator layer  8  is formed (laminated) as illustrated in  FIG.  4 ( b )  (Step S 2 ). Specifically, columnar crystals of cesium iodide (CsI) doped with thallium (Tl) are grown in the region that covers the light receiving portion  3  on the photoelectric conversion element array  7 . An evaporation method or the like may be used for the growth of the columnar crystals. The thickness of the columnar crystals of cesium iodide (CsI) is, for example, approximately 600 μm. 
     Next, the resin frame  9  is formed on the photoelectric conversion element array  7  as illustrated in  FIG.  5 ( a )  (Step S 3 ). Specifically, the resin frame  9  is formed so as to pass between the scintillator layer  8  and the bonding pad  5  and surround the scintillator layer  8  when viewed in the lamination direction A of the scintillator layer  8 . More specifically, the resin frame  9  is formed at a position where the first distance D 1  is 1 mm or less and the second distance D 2  is 5 mm or more. An automatic X-Y coating device or the like can be used to form the resin frame  9 . Hereinafter, what is obtained by forming the scintillator layer  8  and the resin frame  9  on the photoelectric conversion element array  7  will be simply referred to as “substrate” for convenience of description. 
     It should be noted that a masking member (see  FIG.  20 ( a ) ) as illustrated in a second embodiment may be further disposed in addition to the resin frame  9  in Step S 3 . The masking member is a region outside the resin frame  9  and is disposed so as to cover the bonding pad  5 . The masking member protects the surface of the bonding pad  5 . When the masking member is disposed, the masking member is removed together with the protective film  13  in Step S 6  of removing the outside part of the protective film  13 , which will be described later. 
     Next, the first organic film  10  is formed as illustrated in  FIG.  5 ( b )  (Step S 4   a ). The cesium iodide (CsI) that forms the scintillator layer  8  is highly hygroscopic. Accordingly, with the scintillator layer  8  exposed, the scintillator layer  8  absorbs water vapor in the air. As a result, the scintillator layer  8  is dissolved. In this regard, the surface of the entire substrate is coated with polyparaxylylene by, for example, a CVD method. The thickness of the polyparaxylylene may be 5 μm or more and 25 μm or less. 
     Subsequently, the inorganic film  11  (metal film) is formed as illustrated in  FIG.  6 ( a )  (Step S 4   b ). Specifically, an aluminum film having a thickness of 0.2 μm is laminated by an evaporation method on the surface of the first organic film  10  on the incident surface side where radiation is incident. The incident surface where radiation is incident is the surface of the radiation detector  1  on the side where the scintillator layer  8  is formed. Subsequently, the second organic film  12  is formed as illustrated in  FIG.  6 ( b )  (Step S 4   c ). Specifically the surface of the entire substrate where the inorganic film  11  is formed is recoated with polyparaxylylene by a CVD method. The thickness of the polyparaxylylene may be 5 μm or more and 25 μm. The second organic film  12  prevents deterioration of the inorganic film  11  attributable to corrosion. The protective film  13  is formed as a result of Steps S 4   a , S 4   b , and S 4   c . The part of the protective film  13  outside the substantially middle part of the resin frame  9  is removed through the subsequent treatment. The part of the protective film  13  outside the substantially middle part of the resin frame  9  covers the bonding pad  5 . Accordingly, it is not necessary to form the first organic film  10  and the second organic film  12  on the side surface of the photoelectric conversion element array  7 . In addition, it is not necessary to form the first organic film  10  and the second organic film  12  on the surface of the photoelectric conversion element array  7  on the side opposite to the surface where the scintillator layer  8  is laminated. 
     Subsequently, irradiation with a laser beam L is performed along the resin frame  9  as illustrated in  FIG.  7   . As a result, the protective film  13  is cut (Step S 5 ). Specifically, a laser beam head (not illustrated) performing irradiation with the laser beam L is moved with respect to a stage (not illustrated) where the entire substrate is placed with the protective film  13  formed on the surface of the entire substrate. As a result, scanning with the laser beam L is performed along the resin frame  9  in a one-stroke manner. 
     Hereinafter, Step S 5  of cutting the protective film  13  will be described in more detail with reference to  FIGS.  8 ,  9 ,  10 , and  11   . 
       FIG.  8    is a time history of the energy that is received by an irradiated body in Step S 5 . In this specification, “irradiated body” is the protective film  13  and the resin frame  9 . First, a cutting threshold (threshold energy) is defined. The cutting threshold is a value. The irradiated body is cut when irradiated with energy that is equal to or greater than this value. It should be noted that “cutting” in this specification means the formation of a void in the irradiated body and the void penetrates the irradiated body from the surface that is subject to laser beam irradiation to the surface that is the back with respect to the surface subject to the laser beam irradiation. Accordingly, the term of “cutting” does not pertain to a case where a bottom is provided without penetration from the surface subject to the laser beam irradiation to the back surface. 
     The cutting threshold is determined in accordance with the type of a material, the thickness of an object, and so on. The radiation detector  1  of the first embodiment includes the protective film  13  and the resin frame  9  as the irradiated body. Two cutting thresholds are defined in this case. Specifically, a cutting threshold Q 1  related to the protective film  13  and a cutting threshold Q 2  related to the resin frame  9  are defined. The cutting threshold Q 2  related to the resin frame  9  is larger than the cutting threshold Q 1  related to the protective film  13 . In Step S 5  of cutting the protective film  13 , the protective film  13  is cut and the resin frame  9  is not cut. Then, in Step S 5 , the energy (Qs) of the laser beam to be emitted may be between the cutting threshold Q 2  related to the resin frame  9  and the cutting threshold Q 1  related to the protective film  13 . Specifically, the energy (Qs) of the laser beam to be emitted may be smaller than the cutting threshold Q 2  related to the resin frame  9  and larger than the cutting threshold Q 1  related to the protective film  13 . 
     The time history of the energy includes a period ts when the energy is increased, a period to when the energy is maintained, and a period to when the energy is decreased. 
     The period ts when the energy is increased corresponds to the period (Step S 5   s ) when the pre-irradiation portion Rs (see  FIG.  1   ) is processed. The period ts includes a period ts 1  and a period ts 2 . The period ts 1  is a period for increasing the energy from a value (Q 0 ) smaller than the cutting threshold Q 1  to the cutting threshold Q 1  of the protective film  13 . The period ts 2  is a period for increasing the energy from the cutting threshold Q 1  of the protective film  13  to the energy (Qs). In the pre-irradiation portion Rs in the groove  30  formed in the period ts when the energy is increased, the depth of the pre-irradiation portion Rs gradually increases along the direction of laser beam scanning. 
       FIG.  9 ( a )  illustrates the state of processing in the period ts. In the period ts 1 , the groove  30  does not reach the resin frame  9  since the energy is smaller than the cutting threshold Q 1 . Subsequently, the energy increases with the progress of laser beam scanning. When the energy subsequently reaches the cutting threshold Q 1 , the groove  30  penetrates the protective film  13 . In other words, the groove  30  reaches the surface of the resin frame  9 . Then, the groove  30  reaches a predetermined depth in the period ts 2 . 
     The period ta when the energy is maintained corresponds to the period (Step S 5   a ) when the main irradiation portion Ra (see  FIG.  1   ) is processed. The period ta corresponds to a period when processing related to the main irradiation portion Ra illustrated in  FIG.  1    is performed. Accordingly, the energy (Qs) in this period ta is larger than the cutting threshold Q 1  of the protective film  13  and smaller than the cutting threshold Q 2  of the resin frame  9 . In the main irradiation portion Ra in the groove  30  formed in the period ta when the energy is maintained, the depth d 3  of the main irradiation portion Ra is substantially constant along the direction of laser beam scanning. 
       FIGS.  9 ( b ) and  9 ( c )  illustrate the state of processing in the period ta.  FIG.  9 ( b )  illustrates a state immediately after the processing of the main irradiation portion Ra is started.  FIG.  9 ( c )  illustrates a state immediately before the processing of the main irradiation portion Ra ends. In this manner, setting is performed to the energy (Qs) at which the resin frame  9  can be cut to a predetermined depth. Then, the protective film  13  can be cut in a reliable manner, even if the thickness of the protective film  13  is increased or decreased to some extent, when the width of the increase or decrease is smaller than the width that corresponds to the depth. 
     The period te when the energy is decreased corresponds to the period (Step S 5   e ) when the post-irradiation portion Re (see  FIG.  1   ) is processed. The period te includes a period te 2  and a period te 1 . The period te 2  is a period for decreasing the energy from the energy (Qs) to the cutting threshold Q 1  of the protective film  13 . The period te 1  is a period for decreasing the energy from the cutting threshold Q 1  of the protective film  13  to the value (Q 0 ) smaller than the cutting threshold Q 1 . In the post-irradiation portion Re in the groove  30  formed in the period te when the energy is decreased, the depth of the post-irradiation portion Re gradually decreases along the direction of laser beam scanning. 
       FIGS.  10 ( a ) and  10 ( b )  illustrate the state of processing in the period te. The energy gradually decreases from the energy (Qs) in the period te. As illustrated in  FIG.  10 ( a ) , the depth of the resin frame  9  in the groove  30  gradually decreases. Further, a part of the period te overlaps a part of the period ts in the direction of laser beam scanning. In other words, as illustrated in  FIG.  10 ( b ) , the part already irradiated with a laser beam in the period ts is re-irradiated with a laser beam in the period te. In this manner, in the region on which laser beam irradiation is performed twice, the depth of the groove  30  gradually increases before the second irradiation. With respect to such a shape, in the second irradiation, the energy of the laser beam is controlled such that the depth of the formed groove  30  gradually decreases. Accordingly, a part P remaining in the first irradiation is removed by the second irradiation. As a result, the protective film  13  penetrates and the resin frame  9  is dug to a predetermined depth. 
     It should be noted that a depth W 1  of the part formed in the periods ts and te may be equal to or different from a depth W 2  of the part formed in the period ta. In other words, the depth W 2  may be smaller than the depth W 1 . In addition, the depth W 2  may be larger than the depth W 1 . 
     The history of the unit energy illustrated in  FIG.  8    can be realized by one selected from several control variables. In addition, the history of the unit energy can be realized by combining a plurality of control variables. 
     Examples of the control variables include the movement speed of the laser beam head, the irradiation energy of the laser beam, and the focal position of the laser beam. 
       FIG.  11 ( a )  is an example of the history of the movement speed of the laser beam head for realizing the history of the unit energy of  FIG.  8   . In the period ts, the speed is reduced from V 0  to Vs with the passage of time. In the period ta, the speed is maintained at Vs. In the period te, the speed is increased from Vs to V 0  with the passage of time. 
       FIG.  11 ( b )  is an example of the history of the irradiation energy of the laser beam for realizing the history of the unit energy of  FIG.  8   . In the period ts, the energy is increased from Q 0  to Qs with the passage of time. In the period ta, the energy is maintained at Qs. In the period te, the energy is reduced from Qs to Q 0  with the passage of time. 
       FIG.  11 ( c )  is an example of the history of the focal position of the laser beam for realizing the history of the unit energy of  FIG.  8   . In the period ts, the focal position is brought closer to the surface of the irradiated body with the passage of time (P 0  to Ps). In the period ta, the focal position is maintained on the surface of the irradiated body (Ps). In the period te, the focal position is moved away from the surface of the irradiated body with the passage of time (Ps to P 0 ). 
     According to the above laser beam control mode, it is possible to reliably prevent the laser beam from penetrating the resin frame  9  as well as the protective film  13 . In other words, the protective film  13  is cut in a reliable manner and the surface of the photoelectric conversion element array  7  provided with the resin frame  9  is not damaged by laser beam irradiation. Accordingly, the occurrence of a defective product is suppressed and productivity can be improved. 
     It should be noted that the following control may be performed in addition to the above control mode in carrying out Step S 5 . 
     The above control is on the premise that the initiation of the laser beam irradiation is simultaneous with the initiation of the laser beam head movement. By, for example, shifting the timing of the head movement initiation with respect to the timing of the irradiation initiation, it is possible to prevent the irradiated body from being irradiated with excessive energy. 
     For example, the operation at the irradiation initiation is as follows. First, the movement of the laser beam head is started (t 0  in  FIG.  12 ( a ) ). At this time, no laser beam irradiation is started (see a laser beam head  300  in  FIG.  12 ( b ) ). The speed of the laser beam head increases with the passage of time (t 0  to t 1 ). Then, irradiation with the laser beam L is started when the speed of the laser beam head reaches a predetermined value (Va) (see ts in  FIG.  12 ( a )  and the laser beam head  300  in  FIG.  12 ( b ) ). This predetermined value may be the steady speed (Vs). Alternatively, the value may be larger than a speed threshold (V 1 ) and smaller than the steady speed (Vs). In other words, the timing (ts) when the laser beam irradiation is started is set to be preceded by the timing (t 0 ) when the movement of the laser beam head is started. The timing of the irradiation initiation is delayed from the timing of the head movement initiation, and thus such control is called “delay control”. 
     In addition, when the laser beam irradiation is ended, the timing when the irradiation is stopped is set to precede the timing when the movement of the laser beam head is stopped. For example, the laser beam irradiation may be stopped when the speed of the laser beam head is the steady speed (Vs). In the period when the speed of the laser beam head is reduced, the laser beam irradiation may be stopped in a period when the speed allows irradiation with the unit energy that is below the cutting threshold Q 1  of the resin frame  9 . In addition, the energy per unit length decreases as the speed of the laser beam head increases. Accordingly, the laser beam irradiation may be stopped during an increase in laser beam head speed. 
     According to the above laser beam control mode, it is possible to more reliably prevent the laser beam from reaching the resin frame  9  as well as the protective film  13 . In other words, the protective film  13  is cut in a reliable manner and the surface of the photoelectric conversion element array  7  provided with the resin frame  9  is not damaged by laser beam irradiation. Accordingly, the occurrence of a defective product is suppressed and productivity can be improved. 
     It should be noted that the above delay control is not premised on control based on the energy history illustrated in  FIG.  8   . The delay control may be used alone. 
     The protective film  13  is cut by executing Step S 5  described above. 
     Subsequently, as illustrated in  FIG.  13 ( a ) , the part outside the portion of the protective film  13  cut by the laser beam L is removed. As a result, the bonding pad  5  is exposed (Step S 6 ). The part outside the cut portion includes a part on the side opposite to the incident surface. Subsequently, as illustrated in  FIG.  13 ( b ) , coating with an uncured resin material is performed along the resin frame  9  (Step S 7 ). The uncured resin material is provided so as to cover the outer edge  13   a  of the protective film  13  and the resin frame  9 . The uncured resin material is, for example, an ultraviolet-curable acrylic resin or the like. Subsequently, the uncured resin material is irradiated with ultraviolet rays. As a result, the resin material is cured and the coating resin  14  is formed. 
     The protective film  13  comes into close contact with the photoelectric conversion element array  7  via the resin frame  9  even without the coating resin  14 . However, by forming the coating resin  14 , the protective film  13  including the first organic film  10  is sandwiched between the resin frame  9  and the coating resin  14 . In other words, the protective film  13  is fixed. As a result, the close contact of the protective film  13  on the photoelectric conversion element array  7  is further improved. Accordingly, the scintillator  8   a  is sealed by the protective film  13 . As a result, moisture infiltration into the scintillator  8   a  can be prevented in a reliable manner. In other words, it is possible to prevent a decline in element resolution attributable to the deterioration of the scintillator  8   a  resulting from the moisture absorption of the scintillator  8   a.    
     In the first embodiment, the resin frame  9  is a panel protection portion. The panel protection portion may be configured by a plurality of members. For example, the panel protection portion may have the resin frame  9  and a masking member attached on the resin frame  9 . According to this configuration, the panel protection portion configured by the resin frame  9  and the masking member is formed when laser beam irradiation is performed (Step S 5 ). Accordingly, it is possible to ensure a considerable distance from the protective film  13  to the photoelectric conversion element array  7  with respect to the laser beam irradiation. As a result, the effect of the laser beam irradiation on the photoelectric conversion element array  7  can be suppressed more reliably. 
     &lt;Action and Effect&gt; 
     Hereinafter, the action and effect of the present embodiment will be described. In the problems described above, the laser beam irradiation mode may have a slight difference between preset content and actual operation. First, the mode is exemplified regarding this point. 
     The time at which the energy of the laser beam rises from zero (non-irradiation) to a predetermined level on the surface of the irradiated body when the laser beam irradiation is initiated (t 1  in  FIG.  14 ( a ) ) is much shorter than the time when the laser beam head reaches a predetermined movement speed from a movement speed of zero (t 1  to t 3  in  FIG.  14 ( b ) ). 
     Then, the energy (Q 3  to Qs) of the laser beam that the irradiated body receives per unit time (length) in the acceleration period (t 1  to t 3 ) from the zero movement speed to the predetermined laser beam head movement speed is different from the energy (Qs) of the laser beam that the irradiated body receives per unit time (length) in the steady period (t 3  to t 4 ) when the laser beam head moves at a predetermined speed. Specifically, the movement speed (Vs) of the laser beam head in the steady period (t 3  to t 4 ) exceeds the movement speed ( 0  to Vs) of the laser beam head in the acceleration period (t 1  to t 3 ). Accordingly, the energy (Q 3  to Qs) of the laser beam that the irradiated body receives in the acceleration period (t 1  to t 3 ) exceeds the energy (Qs) of the laser beam that the irradiated body receives in the steady period (t 3  to t 4 ). Accordingly, assuming that the laser beam head is too slow with respect to the energy of the laser beam in the acceleration period (t 1  to t 3 ), the irradiated body may be irradiated with excessive energy. Assuming that this energy exceeds the energy (Q 2 ) at which the resin frame  9  is cut, the photoelectric conversion element array  7  under the resin frame  9  may be damaged. 
     The radiation detector  1  includes the photoelectric conversion element array  7  having the light receiving portion  3  including the plurality of photoelectric conversion elements  3   a  arranged one-dimensionally or two-dimensionally and the plurality of bonding pads  5  electrically connected to the photoelectric conversion elements  3   a  and disposed outside the light receiving portion  3 , the scintillator layer  8  laminated on the photoelectric conversion element array  7  so as to cover the light receiving portion  3  and converting radiation into light, the resin frame  9  formed on the photoelectric conversion element array  7  so as to pass between the scintillator layer  8  and the bonding pad  5  and surround the scintillator layer  8  apart from the scintillator layer  8  and the bonding pad  5  when viewed in the lamination direction A of the scintillator layer  8 , and the protective film  13  covering the scintillator layer  8  and having the outer edge  13   a  positioned on the resin frame  9 . The groove  30  continuous with the outer edge  13   a  of the protective film  13  is formed in the resin frame  9 . The groove  30  includes the pre-irradiation portion Rs formed by performing scanning along the resin frame  9  while increasing the energy of the laser beam to a value larger than the cutting threshold Q 1  from a value (Q 0 ) smaller than the cutting threshold Q 1  at which the protective film  13  can be cut, the main irradiation portion Ra formed by performing scanning along the resin frame  9  while maintaining the energy of the laser beam at a value (Qs) larger than the cutting threshold Q 1 , and the post-irradiation portion Re formed by performing scanning along the resin frame  9  while decreasing the energy of the laser beam from a value larger than the cutting threshold Q 1  to a value (Q 0 ) smaller than the cutting threshold Q 1 . 
     The groove  30  of the resin frame  9  of the radiation detector  1  is continuous with the outer edge  13   a  of the protective film  13 . Accordingly, the groove  30  is formed as the outer edge  13   a  of the protective film  13  is formed by laser beam irradiation. When the groove is formed in the resin frame  9 , the protective film  13  formed on the resin frame  9  is cut in a reliable manner. Further, in the pre-irradiation portion Rs, irradiation is started from the energy Q 0  smaller than the cutting threshold Q 1 . According to such an irradiation mode, laser beam irradiation can be started with a margin with respect to the cutting threshold Q 2  required for cutting the resin frame  9 . Accordingly, even if energy exceeding a set value is supplied due to an unintended factor at the initiation of the laser beam irradiation, cutting of the resin frame  9  can be suppressed by the ensured margin. Likewise, in the post-irradiation portion Re, irradiation is stopped after the energy is decreased to Q 0 , which is smaller than the cutting threshold Q 1 . According to such an irradiation mode, laser beam irradiation can be stopped with a margin with respect to the cutting threshold Q 2  required for cutting the resin frame  9 . Accordingly, even if energy exceeding a set value is supplied due to an unintended factor when the laser beam irradiation is stopped, cutting of the resin frame  9  can be suppressed by the ensured margin. Accordingly, the occurrence of unintended cutting of the resin frame  9  can be suppressed. 
     The radiation detector  1  further includes the coating resin  14  covering the outer edge  13   a  of the protective film  13 . According to this configuration, the occurrence of peeling of the protective film  13  can be suppressed. 
     The coating resin  14  further covers the resin frame  9 . The viscosity and the thixotropy of the coating resin  14  allow the coating resin  14  to stay on the resin frame  9  such that an edge portion  14   e  of the surface where the coating resin  14  and the resin frame  9  come into contact with each other is formed on the resin frame  9 . According to this configuration, the coating resin  14  reaches neither the surface of the photoelectric conversion element array  7  positioned outside the resin frame  9  nor the bonding pad  5 . Accordingly, each of the surface of the photoelectric conversion element array  7  and the bonding pad  5  can be kept clean. 
     The middle portion of the resin frame  9  is higher than both edge portions of the resin frame  9 . According to this configuration, the coating resin  14  is capable of covering the outer edge  13   a  of the protective film  13  in a reliable manner. 
     The width of the resin frame  9  is 700 μm or more to 1000 μm or less. According to this configuration, the radiation detector  1  can be reduced in size. 
     The height of the resin frame  9  is 100 μm or more to 300 μm or less. According to this configuration, the radiation detector  1  can be reduced in size. 
     The method for manufacturing the radiation detector  1  has Step S 2  of preparing the photoelectric conversion element array  7  having the light receiving portion  3  including the plurality of photoelectric conversion elements  3   a  arranged one-dimensionally or two-dimensionally and the plurality of bonding pads  5  electrically connected to the photoelectric conversion elements  3   a  and disposed outside the light receiving portion  3  and laminating the scintillator layer  8  converting radiation into light on the photoelectric conversion element array  7  so as to cover the light receiving portion  3 , Step S 3  of disposing the resin frame  9  on the photoelectric conversion element array  7  so as to surround the scintillator layer  8  when viewed in the lamination direction of the scintillator layer  8 , Steps S 4   a , S 4   b , and S 4   c  of forming the protective film  13  so as to cover the entire surface of the photoelectric conversion element array  7  on the side where the scintillator layer  8  is laminated and the surface of the resin frame  9 , Step S 5  of cutting the protective film  13  by performing laser beam irradiation along the resin frame  9 , and Step S 6  of removing the outside part of the protective film  13 . Step S 5  of cutting the protective film  13  includes the pre-irradiation step S 5   s  of performing scanning along the resin frame  9  while increasing the energy of the laser beam to a value larger than the cutting threshold Q 1  from a value smaller than the cutting threshold Q 1  at which the protective film  13  can be cut, the main irradiation step S 5   a  of performing scanning along the resin frame  9  while maintaining the energy of the laser beam at a value larger than the cutting threshold Q 1 , and the post-irradiation step S 5   e  of performing scanning along the resin frame  9  while decreasing the energy of the laser beam from a value larger than the cutting threshold Q 1  to a value smaller than the cutting threshold Q 1 . 
     In the method for manufacturing the radiation detector  1 , the outer edge  13   a  of the protective film  13  and the groove  30  of the resin frame  9  are formed in Step S 5  of cutting the protective film  13 . When the groove  30  is formed in the resin frame  9 , the protective film  13  formed on the resin frame  9  is cut in a reliable manner. Further, the groove  30  includes the pre-irradiation step S 5   s  of forming the groove while increasing the energy and the post-irradiation step S 5   e  of forming the groove while decreasing the energy. According to the pre-irradiation portion Rs and the post-irradiation portion Re, the depth of the groove  30  does not excessively increase. Accordingly, the occurrence of unintended cutting of the resin frame  9  can be suppressed. As a result, it is possible to prevent the laser beam from penetrating the resin frame  9  as well as the protective film  13 . 
     In other words, the protective film  13  is cut in a reliable manner and the surface of the photoelectric conversion element array  7  provided with the resin frame  9  is not damaged by laser beam irradiation. Accordingly, the occurrence of a defective product is suppressed and productivity can be improved. 
     In the method for manufacturing the radiation detector  1 , the resin frame  9  is a panel protection portion. In Step S 3  of disposing the resin frame  9 , the resin frame  9  is disposed on the photoelectric conversion element array  7  so as to pass between the scintillator layer  8  and the bonding pad  5  and surround the scintillator layer  8  apart from the scintillator layer  8  and the bonding pad  5 . According to this Step S 3 , the radiation detector  1  having the resin frame  9  can be manufactured. 
     The above has been described in detail based on the first embodiment of the present invention. However, the present invention is not limited to the first embodiment described above. The present invention can be modified in various ways without departing from the gist thereof. 
     The radiation detector of the present invention has been described in detail based on the first embodiment. However, the radiation detector of the present invention is not limited to the first embodiment. The present invention can be variously modified within the gist of the present invention. For example, the protective film  13  had a structure in which the inorganic film  11  was sandwiched between the first organic film  10  and the second organic film  12  made of polyparaxylylene. In other words, the material of the first organic film  10  was the same as the material of the second organic film  12 . For example, the material of the first organic film  10  may be different from the material of the second organic film  12 . In addition, the protective film  13  may lack the second organic film  12  when a material resistant to corrosion is used as the inorganic film  11 . The light receiving portion  3  of the radiation detector  1  had the plurality of photoelectric conversion elements  3   a  arranged two-dimensionally. The light receiving portion  3  may have the plurality of photoelectric conversion elements  3   a  that are arranged one-dimensionally. The bonding pad  5  may be formed on two sides of the rectangular radiation detector  1 . Further, the bonding pad  5  may be formed on three sides of the rectangular radiation detector  1 . In addition, in the first embodiment, a method for performing laser processing by moving a laser beam head has been described. For example, laser beam irradiation may be performed while a stage where the radiation detector  1  is placed is moved. 
     Second Embodiment 
     A radiation detector  1 A of the second embodiment and a method for manufacturing the radiation detector  1 A will be described. In the radiation detector  1  of the first embodiment, the resin frame  9  is used as a panel protection portion. Specifically, the resin frame  9  is used as a member protecting the photoelectric conversion element array  7  from a laser beam in the step of cutting the protective film  13  in manufacturing the radiation detector  1 . The radiation detector  1  includes the resin frame  9  as a component. 
     In the radiation detector  1 A of the second embodiment, a masking member M 1  (see  FIG.  20    and so on) is used as a member protecting the photoelectric conversion element array  7  from a laser beam in cutting the protective film  13 . The masking member M 1  is removed after Step S 15  of cutting a protective film  20 . The radiation detector  1 A does not include the masking member M 1  as a component. 
     As illustrated in  FIGS.  15  and  16   , the radiation detector  1 A includes the photoelectric conversion element array  7 , the scintillator layer  8 , and the protective film  20 . The photoelectric conversion element array  7  and the scintillator layer  8  are the same as those of the first embodiment. Accordingly, detailed description of the photoelectric conversion element array  7  and the scintillator layer  8  will be omitted. Hereinafter, the protective film  20  will be described in detail. 
     The protective film  20  has a main body portion  21  and an outer edge portion  22 . The main body portion  21  covers the scintillator layer  8 . The first organic film  10  in the main body portion  21  is provided on the scintillator layer  8 . The spaces between the plurality of scintillators  8   a  having the columnar structure are filled with the first organic film  10 . The outer edge portion  22  is provided outside the main body portion  21 . The outer edge portion  22  is continuous with the main body portion  21 . 
     The outer edge portion  22  has a close contact portion  23  and an extending portion  24 . The close contact portion  23  is in close contact with the photoelectric conversion element array  7  in a region K between the scintillator layer  8  and the bonding pad  5 . For example, a part of the first organic film  10  that is on the scintillator layer  8  side in the close contact portion  23  has a surface in close contact with the photoelectric conversion element array  7 . As a result, the close contact portion  23  comes into close contact with the photoelectric conversion element array  7 . By enlarging the close contact surface, the close contact of the photoelectric conversion element array  7  with the close contact portion  23  is enhanced. The enlargement of the close contact surface is, in other words, increasing the sum of a length g 1  and a length g 2  of the close contact portion. 
     The close contact portion  23  has a first part  23   a  and a second part  23   b . The first part  23   a  is positioned on the main body portion  21  side. The first part  23   a  has the first organic film  10 , the inorganic film  11 , and the second organic film  12 . The first part  23   a  is a three-layer structure. The second part  23   b  is positioned on the side opposite to the main body portion  21  with the first part  23   a  interposed therebetween. The second part  23   b  has the first organic film  10  and the second organic film  12 . The second part  23   b  is a two-layer structure. An outer edge end  11   a  of the inorganic film  11  is positioned inside an outer edge end  20   a  of the protective film  20 . In other words, the outer edge end  11   a  of the inorganic film  11  is positioned on the scintillator layer  8  side. At the first part  23   a , the inorganic film  11  is sandwiched between an outer edge portion  10   b  of the first organic film  10  and an outer edge portion  12   b  of the second organic film  12 . The second part  23   b  is positioned outside an outer edge portion  11   b  of the inorganic film  11 . In other words, the second part  23   b  is positioned closer to the bonding pad  5  side than the outer edge portion  11   b  of the inorganic film  11 . The outer edge portion  10   b  of the first organic film  10  is joined to the outer edge portion  12   b  of the second organic film  12  at the second part  23   b . The first organic film  10  and the second organic film  12  may be integrated when the first organic film  10  and the second organic film  12  are made of the same material. In the close contact portion  23 , the outer edge portion  10   b  of the first organic film  10  and the outer edge portion  12   b  of the second organic film  12  wrap the outer edge portion  11   b  of the inorganic film  11  in cooperation with each other. 
     The extending portion  24  has a two-layer structure made of the first organic film  10  and the second organic film  12 . The extending portion  24  extends in a self-supporting state from the close contact portion  23  to the side opposite to the photoelectric conversion element array  7 . The extending portion  24  is positioned on the side of the protective film  20  that is closest to the outer edge end  20   a . The outer edge end  20   a  of the protective film  20  is configured by an outer edge end  10   a  of the first organic film  10  and an outer edge end  12   a  of the second organic film  12 . The extending portion  24  has a rising portion  24   a  and a piece portion  24   b . The rising portion  24   a  extends in the normal direction of the surface of the photoelectric conversion element array  7  with the part of the close contact portion  23  that is on the side opposite to the main body portion  21  serving as a base end. Here, “self-supporting state” means a state where the rising portion  24   a  is upright without being held or supported by any member. Examples of the member include resin. The base end part of the rising portion  24   a  is connected to the close contact portion  23 . The part of the rising portion  24   a  other than the base end part is not in contact with any element of the radiation detector  1 A. 
     The rising portion  24   a  extends in a self-supporting state in the normal direction of the surface of the photoelectric conversion element array  7 . In other words, the rising portion  24   a  is upright from the photoelectric conversion element array  7 . The extension direction of the rising portion  24   a  is not limited thereto. The rising portion  24   a  may extend in a self-supporting state along a direction intersecting with the direction that is parallel to the surface of the photoelectric conversion element array  7 . For example, the rising portion  24   a  may be inclined to the bonding pad  5  side with a state where the rising portion  24   a  is upright from the photoelectric conversion element array  7  used as a reference. The rising portion  24   a  may be inclined to the scintillator layer  8  side with a state where the rising portion  24   a  is upright from the photoelectric conversion element array  7  used as a reference. In addition, the shape of the rising portion  24   a  is not limited to a flat surface. The shape of the rising portion  24   a  may be, for example, a curved surface. 
     The piece portion  24   b  protrudes from the upper portion of the rising portion  24   a  toward the bonding pad  5  side. The direction in which the piece portion  24   b  protrudes is parallel to the surface of the photoelectric conversion element array  7 . However, the direction in which the piece portion  24   b  protrudes is not limited to the direction parallel to the surface of the photoelectric conversion element array  7 . The direction in which the piece portion  24   b  protrudes may be different from the direction in which the rising portion  24   a  extends. For example, the piece portion  24   b  may be inclined so as to gradually approach the photoelectric conversion element array  7  with a state where the piece portion  24   b  is parallel to the surface of the photoelectric conversion element array  7  used as a reference. The piece portion  24   b  may be inclined so as to be gradually separated from the photoelectric conversion element array  7 . In addition, the shape of the piece portion  24   b  is not limited to a flat surface. The shape of the piece portion  24   b  may be, for example, a curved surface. 
     In  FIG.  16   , the length g 1  and the length g 2  indicate the length of the close contact portion  23 . Specifically, the length g 1  indicates the length of the first part  23   a  of the close contact portion  23 . The length g 2  indicates the length of the second part  23   b  of the close contact portion  23 . The sum of the length g 1  and the length g 2  is, for example, approximately 1000 μm. Alternatively, the sum of the length g 1  and the length g 2  is, for example, 1000 μm or less. A length g 3  is the height of the rising portion  24   a . In other words, the length g 3  is the height of the extending portion  24 . The length g 3  is, for example, 80 μm or more to 250 μm or less. A length g 4  is the length of the piece portion  24   b  of the extending portion  24 . The length g 4  is, for example, approximately 300 μm. Alternatively, the length g 4  is, for example, 300 μm or less. A length g 5  is the distance from the boundary between the close contact portion  23  and the extending portion  24  to the bonding pad  5 . The length g 5  is longer than the length g 4 . For example, the length g 5  is longer than the length g 4  by approximately tens of micrometers to hundreds of micrometers. According to this configuration, the extending portion  24  does not interfere with the bonding pad  5 . 
     The external shape of the radiation detector  1 A will be described.  FIG.  17    is a perspective view schematically illustrating a corner part of the radiation detector  1 A.  FIG.  18    is a perspective view schematically illustrating the corner part of the radiation detector  1 A viewed at an angle different from the angle in  FIG.  17   . It should be noted that a cross section of the scintillator layer  8  is illustrated in  FIG.  18    such that the scintillator layer  8  covered with the protective film  20  is visible. In  FIG.  18   , the plurality of scintillators  8   a  having the columnar structure are indicated by dashed lines. As is apparent from the drawings including  FIGS.  17  and  18   , the outer edge portion  22  of the protective film  20  has the close contact portion  23  and the extending portion  24 . The rising portion  24   a  is inclined to the bonding pad  5  side. It should be noted that the piece portion  24   b  may also be inclined to the bonding pad  5  side. In addition, the part where the rising portion  24   a  and the piece portion  24   b  are connected is not bent at a right angle. In other words, the part where the rising portion  24   a  and the piece portion  24   b  are connected may be bent smoothly. 
     &lt;Action and Effect of Radiation Detector&gt; 
     The action and effect of the radiation detector  1 A will be described. In the radiation detector  1 A, the outer edge portion  22  of the protective film  20  covering the scintillator layer  8  has the close contact portion  23  coining into close contact with the photoelectric conversion element array  7 . With the close contact portion  23 , it is possible to prevent moisture from entering toward the scintillator layer  8  from between the protective film  20  and the photoelectric conversion element array  7 . Further, the outer edge portion  22  of the protective film  20  has the extending portion  24 . The extending portion  24  extends in a self-supporting state along the direction opposite to the direction from the close contact portion  23  toward the photoelectric conversion element array  7 . When the outer edge portion  22  of the protective film  20  does not have the extending portion  24 , the outer edge end  20   a  of the protective film  20  is included in the close contact portion  23 . In that case, it becomes difficult to ensure a close contact between the part of the close contact portion  23  where the outer edge end  20   a  of the protective film  20  is positioned and the photoelectric conversion element array  7  in particular. As a result, moisture is likely to intrude into the scintillator layer  8  from between the close contact portion  23  and the photoelectric conversion element array  7 . 
     On the other hand, the outer edge portion  22  of the protective film  20  in the radiation detector  1 A has the extending portion  24 . The outer edge end  20   a  of the protective film  20  is not included in the close contact portion  23 . In other words, a close contact between the close contact portion  23  and the photoelectric conversion element array  7  can be ensured sufficiently. As a result, the moisture resistance of the scintillator layer  8  can be improved as compared with a case where the extending portion  24  is not provided. Accordingly, the moisture resistance of the scintillator layer  8  can be maintained even without holding the outer edge portion of the protective film  20  with a resin member (resin frame  9 ) as in the first embodiment. Further, the region K between the scintillator layer  8  and the bonding pad  5  can be narrowed since it is not necessary to provide the resin member supporting the outer edge portion of the protective film  20 . For example, when the width of the resin frame  9  is approximately 900 μm, the region K can be reduced by the length that corresponds to the width of the resin frame  9 . Accordingly, the radiation detector  1 A is capable of ensuring the moisture resistance of the scintillator layer  8  and suppressing enlargement of the region K between the scintillator layer  8  and the bonding pad  5 . In other words, the radiation detector  1 A is capable of reducing the region K. As a result, the length of the signal line  4  electrically connecting the light receiving portion  3  to the bonding pad  5  can be reduced. Accordingly, electric signal transmission can be expedited. In addition, an increase in noise can be suppressed since the signal line  4  is short. 
     The protective film  20  has the inorganic film  11 , the first organic film  10 , and the second organic film  12 . The first organic film  10  is disposed on the scintillator layer  8  side with respect to the inorganic film  11 . The second organic film  12  is disposed on the side opposite to the scintillator layer  8  with respect to the inorganic film  11 . By the protective film  20  including the inorganic film  11 , it is possible to prevent the light generated in the scintillator layer  8  from leaking to the outside. In other words, it is possible to prevent the light generated in the scintillator layer  8  from leaking to a part other than the light receiving portion  3 . As a result, the sensitivity of the radiation detector  1 A is improved. The first organic film  10  and the second organic film  12  are provided on both sides of the inorganic film  11 . According to this configuration, the first organic film  10  and the second organic film  12  are also capable of protecting the inorganic film  11 . 
     The outer edge end  11   a  of the inorganic film  11  is positioned inside the outer edge end  20   a  of the protective film  20 . The outer edge end  20   a  of the protective film  20  is configured by the outer edge end  10   a  of the first organic film  10  and the outer edge end  12   a  of the second organic film  12 . The outer edge portion  10   b  of the first organic film  10  is joined to the outer edge portion  12   b  of the second organic film  12  outside the outer edge end  11   a  of the inorganic film  11 . The outer edge portion  10   b  of the first organic film  10  and the outer edge portion  12   b  of the second organic film  12  cover the outer edge portion  11   b  of the inorganic film  11 . The outer edge portion  11   b  of the inorganic film  11  is sealed by the outer edge portion  10   b  of the first organic film  10  and the outer edge portion  12   b  of the second organic film  12  even when, for example, the close contact between the inorganic film  11  and the first organic film  10  or the close contact between the inorganic film  11  and the second organic film  12  is not satisfactory. Accordingly, a close contact of the second organic film  12  with the first organic film  10  can be ensured. 
     The inorganic film  11  is a metal film made of aluminum or silver. Accordingly, the inorganic film  11  can be satisfactory in terms of light reflectivity. 
     The height of the extending portion  24  is 80 μm or more to 250 μm or less. Accordingly, the moisture resistance of the scintillator layer  8  can be ensured more reliably. 
     The extending portion  24  has the rising portion  24   a  and the piece portion  24   b . The piece portion  24   b  protrudes from the upper portion of the rising portion  24   a  toward the bonding pad  5 . The extending portion  24  has not only the rising portion  24   a  but also the piece portion  24   b . Accordingly, the outer edge end  20   a  of the protective film  20  can be at a sufficient distance from the close contact portion  23 . As a result, a close contact of the photoelectric conversion element array  7  with the close contact portion  23  can be ensured more reliably. Even in this case, the length of the piece portion  24   b  is, for example, approximately 300 μm. Alternatively, the length of the piece portion  24   b  is, for example, 300 μm or less. Accordingly, the region K between the scintillator layer  8  and the bonding pad  5  can be reduced. 
     When a conductive member such as a wire is bonded to the bonding pad  5  in a wiring process or the like, foreign matter or the like may fly from the bonding part toward the scintillator layer  8  side. In that case, the extending portion  24  functions as a protective wall protecting the scintillator layer  8  from the foreign matter or the like. As a result, contamination of the scintillator layer  8  during bonding can be prevented. 
     The photoelectric conversion element array  7  may be expensive. It is conceivable to reuse the photoelectric conversion element array  7  when the radiation detector  1 A is substandard in terms of quality or the like as a result of inspection in the manufacturing process. In that case, the scintillator layer  8  that is new is provided on the photoelectric conversion element array  7  after the scintillator layer  8  provided on the photoelectric conversion element array  7  is removed. Removal of the protective film  20  is required for that purpose. According to the radiation detector  1 A of the present embodiment, the outer edge portion  22  of the protective film  20  has the extending portion  24 . During peeling of the protective film  20  from the photoelectric conversion element array  7 , for example, the extending portion  24  can be used as the starting point of the peeling, examples of which include gripping and pulling up the extending portion  24 . Accordingly, with the extending portion  24 , the protective film  20  can be removed with relative ease. 
     &lt;Method for Manufacturing Radiation Detector&gt; 
     Next, each step of the method for manufacturing the radiation detector  1 A will be described with reference to  FIGS.  19  to  23   . First, the photoelectric conversion element array  7  is prepared as illustrated in  FIG.  19 ( a )  (Step S 11 ). Next, as illustrated in  FIG.  19 ( b ) , the scintillator layer  8  is provided on the photoelectric conversion element array  7  so as to cover the light receiving portion  3  (Step S 12 ). 
     Next, as illustrated in  FIG.  20 ( a ) , the masking member M 1  is provided on the photoelectric conversion element array  7  so as to cover the bonding pads  5  (Step S 13 ). The masking member M 1  is, for example, a UV-curable masking tape. Hereinafter, the UV-curable masking tape will be simply referred to as “UV tape”. The plurality of bonding pads  5  are disposed along the outer edge side of the substrate  2 . Accordingly, first, the longitudinal direction of the UV tape is matched with the direction in which the bonding pads  5  are disposed. Next, the adhesive surface of the UV tape is attached to the photoelectric conversion element array  7  such that the UV tape covers the bonding pads  5 . The thickness of the UV tape may be, for example, approximately 110 μm. In addition, the thickness of the UV tape may be 110 μm or less. A plurality of the UV tapes may be used in layers so that the thickness of the masking member M 1  is adjusted. 
     The protective film  20  is provided on the photoelectric conversion element array  7  so as to cover the scintillator layer  8 , the region K, and the masking member M 1  (Step S 14 ). Specifically, first, the first organic film  10  is formed as illustrated in  FIG.  20 ( b )  (Step S 14   a ). For example, the entire surface of the substrate  2  is coated with polyparaxylylene or the like by a CVD method. Next, the inorganic film  11  is formed on the first organic film  10  as illustrated in  FIG.  21 ( a )  (Step S 14   b ). For example, an aluminum film is laminated on the inorganic film  11  by an evaporation method. Here, the bonding pad  5  may not be covered with the inorganic film  11 . In that case, the aluminum film may be evaporated after the bonding pad  5  is masked by means of a masking member M 2 . A UV tape or the like may be used for the masking member M 2 . Subsequently, the second organic film  12  is formed as illustrated in  FIG.  21 ( b )  (Step S 14   c ). For example, the entire surface of the substrate  2  is recoated with polyparaxylylene or the like by a CVD method. 
     Subsequently, as illustrated in  FIG.  22 ( a ) , the protective film  20  is cut on the masking member M 1  by irradiation with the laser beam L (Step S 15 ). For example, a laser beam head (not illustrated) performing irradiation with the laser beam L is moved with respect to a stage (not illustrated) where the substrate  2  is placed. As a result, scanning with the laser beam L is performed along the edge portion of the masking member M 1  that is on the scintillator layer  8  side. 
     The specific step may be the same as Step S 5  of the first embodiment. 
     The masking member M 1  is removed (Step S 16 ). Specifically, the masking member M 1  is removed after the adhesive force of the adhesive surface of the masking member M 1 , which is a UV tape, is reduced. First, irradiation with ultraviolet rays is performed toward the masking member M 1  as illustrated in  FIG.  22 ( b )  (Step S 16   a ). The ultraviolet rays are transmitted through the protective film  20  and reach the masking member M 1 . The masking member M 1  loses the adhesive force of the adhesive surface by being irradiated with the ultraviolet rays. Then, the masking member M 1  is removed as illustrated in  FIG.  23    (Step S 16   b ). The part of the cut protective film  20  covering the masking member M 1  is removed together with the masking member M 1 . As a result, the bonding pad  5  is exposed. 
     &lt;Action and Effect&gt; 
     In the method for manufacturing the radiation detector  1 A, the masking member M 1  is a panel protection portion. In Step S 13  of disposing the masking member M 1 , the masking member M 1  is disposed on the photoelectric conversion element array  7  so as to cover the region K between the scintillator layer  8  and the bonding pad  5  and the bonding pad  5 . In Step S 14  of forming the protective film  20 , the protective film  20  is formed on the entire surface of the photoelectric conversion element array  7  on the side where the scintillator layer  8  is laminated and the surface of the masking member M 1 . According to this Step S 14 , the radiation detector  1 A without the resin frame  9  can be manufactured. In other words, the distance between the scintillator layer  8  and the bonding pad  5  can be reduced. Accordingly, the radiation detector  1 A can be further reduced in size. 
     The method for manufacturing the radiation detector  1 A further includes Step S 16   b  of removing the masking member M 1  after Step S 15  of cutting the protective film  20 . According to these Steps S 16   a  and  516   b , the radiation detector  1 A without the resin frame  9  can be manufactured in a suitable manner. 
     As illustrated in  FIG.  24   , the method for manufacturing the radiation detector  1 A further includes a step of forming a coating resin  14 A covering the outer edge end  20   a  of the protective film  20  after Step S 16   a  of removing the outside part of the protective film  20 . According to this step, the occurrence of peeling of the outer edge end  20   a  of the protective film  20  can be further suppressed. 
     According to the method for manufacturing the radiation detector  1 A, the bonding pad  5  is covered with the masking member M 1 . In addition, the scintillator layer  8 , the region between the scintillator layer  8  and the bonding pad  5 , and the masking member M 1  are covered with the protective film  20 . As a result, the protective film  20  has the close contact portion  23  coining into close contact with the photoelectric conversion element array  7  in the region K between the scintillator layer  8  and the bonding pad  5 . In addition, a step attributable to the thickness of the masking member M 1  is generated between an end surface of the masking member M 1  and the photoelectric conversion element array  7 . The protective film  20  is formed along the step. As a result, the protective film  20  has the extending portion  24  extending from the close contact portion  23  to the side opposite to the photoelectric conversion element array  7 . Further, irradiation with the laser beam L is performed along the edge portion of the masking member M 1  that is on the scintillator layer  8  side. As a result, the protective film  20  is cut on the masking member M 1 . Then, the masking member M 1  is removed. As a result, the bonding pad  5  is exposed. Further, the extending portion  24  is self-supporting without contact with the masking member M 1 . In addition, the extending portion  24  has the rising portion  24   a  and the piece portion  24   b . The rising portion  24   a  is formed along a step attributable to the edge of the masking member M 1 . The piece portion  24   b  is formed between the rising portion  24   a  and the edge portion of the masking member M 1  irradiated with the laser. 
     The radiation detector  1 A has the close contact portion  23  and the extending portion  24 . The close contact portion  23  comes into close contact with the photoelectric conversion element array  7  in the region K between the scintillator layer  8  and the bonding pad  5 . The extending portion  24  extends in a self-supporting state from the close contact portion  23  to the side opposite to the photoelectric conversion element array  7 . Further, the extending portion  24  includes the rising portion  24   a  and the piece portion  24   b . With these structures, the moisture resistance of the scintillator layer  8  can be maintained. Further, the region K between the scintillator layer  8  and the bonding pad  5  can be narrowed. 
     Here, it is also conceivable that the bonding pad  5  may be damaged as a result of irradiation with the laser beam L. However, in the method for manufacturing the radiation detector  1 A, the bonding pad  5  is covered with the masking member M 1  when the protective film  20  is cut. At this time, the masking member M 1  serves as an absorption layer absorbing the laser beam L. Accordingly, it is possible to prevent the bonding pad  5  from being damaged by being irradiated with the laser beam L. 
     In the method for manufacturing the radiation detector  1 A, the protective film  20  is cut by irradiation with the laser beam L (Step S 15 ). According to Step S 15 , the close contact portion  23  and the extending portion  24  can be accurately molded in the outer edge portion  22  of the protective film  20 . Even when the bonding pads  5  are disposed at predetermined intervals along a plurality of sides (for example, two to four sides) instead of one side of the outer edge of the substrate  2 , scanning with the laser beam L may be performed for each side. Accordingly, the close contact portion  23  and the extending portion  24  can be easily molded in the outer edge portion  22 . 
     Although the second embodiment has been described, the present invention is not limited to the second embodiment. For example, the outer edge end  11   a  of the inorganic film  11  may configure the outer edge end  20   a  of the protective film  20  together with the outer edge end  10   a  of the first organic film  10  and the outer edge end  12   a  of the second organic film  12 . 
     The inorganic film  11  may be a resin film containing a white pigment. Examples of the white pigment include alumina, titanium oxide, zirconium oxide, and yttrium oxide. When a resin film containing a white pigment is the inorganic film  11 , a metal film (for example, aluminum) and a third protective film (the same type of material as the first and second organic films) are further laminated in this order after the second organic film  12  is formed. Aluminum may be employed for the metal film. In addition, the same type of material as the first organic film may be employed for the third protective film. Further, the same type of material as the second organic film may be employed for the third protective film. According to these steps, moisture resistance comparable to that of a metallic reflective film can be obtained even with a resinous reflective film poor in moisture resistance. Further, the optical output that is obtained can be higher than that of a metallic reflective film. Even in this manner, the inorganic film  11  having light reflectivity can be realized. 
     REFERENCE SIGNS LIST 
       1 ,  1 A: radiation detector,  2 : substrate,  3 : light receiving portion,  3   a : photoelectric conversion element,  4 : signal line,  5 : bonding pad,  6 : passivation film,  7 : photoelectric conversion element array,  8 : scintillator layer,  8   a : scintillator,  8   b : peripheral edge portion,  9 : resin frame,  10 : first organic film,  11 : inorganic film (metal film),  12 : second organic film,  13 : protective film,  13   a : outer edge of protective film  13 ,  14 : coating resin,  30 : groove, D 1 : first distance, D 2 : second distance, d, d 1 , d 3 : height, d 2 : width, E 1 : inner edge of resin frame  9 , E 2 : outer edge of resin frame  9 , E 3 : outer edge of scintillator layer  8 , E 4 : outer edge of photoelectric conversion element array  7 , M 1 : masking member.