Patent Publication Number: US-2020300782-A1

Title: Electronic component handler and electronic component tester

Description:
The present application is based on, and claims priority from JP Application Serial Number 2019-050766, filed Mar. 19, 2019, the disclosure of which is hereby incorporated by reference herein in its entirety. 
     BACKGROUND 
     1. Technical Field 
     The present disclosure relates to an electronic component handler and electronic component tester. 
     2. Related Art 
     In related art, electronic component testers also called handers that transport electronic components to test units and test characteristics etc. of the electronic components are used. For example, International Publication 06/109358 discloses an electronic component tester that stores reference image data of a socket without an electronic component to be tested attached thereto acquired from a captured image captured in advance, and determines whether or not the electronic component to be tested remains in the socket by comparison between test image data of the imaged socket and the stored reference image data of the socket. 
     However, in the electronic component tester disclosed in International Publication 06/109358, a method such as image matching is used for the comparison between the test image data of the imaged socket and the stored reference image data of the socket and it is necessary to recognize a shape in the captured image and compare between a recognized shape image and a reference image, and there is a problem that a longer time is taken for a determination. 
     SUMMARY 
     An electronic component handler according to an application is an electronic component handler that transports an electronic component to a test unit, including a holding member including a recess having a colored bottom portion and housing the electronic component in the recess, an imaging unit that images the recess, and a control unit that compares a reference area of the bottom portion previously calculated from a plan view area of the electronic component and a plan view area of the bottom portion with a detection area of the bottom portion detected from an image captured by the imaging unit, and determines presence or absence of the electronic component housed in the recess or whether or not a position of the electronic component housed in the recess is good. 
     In the above described electronic component handler, a color coloring the bottom portion may be different from a color of the electronic component. 
     In the above described electronic component handler, a color coloring the bottom portion may be different from a color of the holding member. 
     In the above described electronic component handler, the imaging unit may be placed above the recess. 
     In the above described electronic component handler, the control unit may acquire the plan view area of the electronic component and the plan view area of the bottom portion from an image previously captured by the imaging unit. 
     In the above described electronic component handler, a plurality of the recesses may be provided, the imaging unit may previously image with respect to each of the recesses, and the control unit may acquire the plan view area of the electronic component and the plan view area of the bottom portion in correspondence with the captured images of the respective recesses. 
     In the above described electronic component handler, the image previously captured by the imaging unit may include an image of the bottom portion in which the electronic component is not housed and an image of the bottom portion in which the electronic component is housed. 
     In the above described electronic component handler, the holding member may include an inclined surface connecting to the bottom portion, and the inclined surface may be colored in a different color from that of the bottom portion. 
     In the above described electronic component handler, a reporting unit is provided, wherein the control unit may transmit a signal to the reporting unit when determining that the electronic component is not housed in the recess or when determining that a position of the electronic component housed in the recess is skewed, and the reporting unit may receive the signal and report. 
     In the above described electronic component handler, the control unit may stop the transport when determining that the electronic component is not housed in the recess or when determining that a position of the electronic component housed in the recess is skewed. 
     An electronic component handler according to an application is an electronic component handler that transports an electronic component to a test unit, including a holding member including a recess having a colored bottom portion and housing the electronic component in the recess, an imaging unit that images the recess, and a control unit that compares a reference ratio of the bottom portion previously calculated from a plan view area of the electronic component and a plan view area of the bottom portion with a detection ratio of the bottom portion detected from an image captured by the imaging unit, and determines presence or absence of the electronic component housed in the recess or whether or not a position of the electronic component housed in the recess is good. 
     An electronic component tester according to an application includes one of the above described electronic component handlers and a test unit that tests the electronic component transported by the electronic component handler. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view showing a schematic configuration of an electronic component tester including an electronic component handler according to an embodiment. 
         FIG. 2  is a plan view showing a schematic configuration of the electronic component tester including the electronic component handler. 
         FIG. 3  is a sectional view showing a schematic configuration of an imaging unit. 
         FIG. 4  is a plan view showing a schematic configuration of a shuttle plate as an example of a holding member. 
         FIG. 5  is a sectional view along A-A in  FIG. 4  showing the schematic configuration of the shuttle plate. 
         FIG. 6  is a block diagram showing a schematic configuration of the electronic component tester. 
         FIG. 7  is a flowchart showing a checking method of an IC device as an electronic component housed in a recess. 
         FIG. 8  is an enlarged plan view showing the recess of the shuttle plate. 
         FIG. 9  is an enlarged plan view showing the recess of the shuttle plate with the IC device housed therein. 
         FIG. 10  is an enlarged sectional view showing the recess of the shuttle plate with the IC device housed therein. 
         FIG. 11  is a plan view showing a case where a housing location of the IC device is displaced. 
         FIG. 12  is an explanatory chart relating to a determination of a position or presence or absence of the IC device. 
         FIG. 13  is a sectional view showing a configuration example in which inclined surfaces of the recess are colored. 
     
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     As below, an electronic component handler and electronic component tester according to the present disclosure will be explained in detail based on embodiments shown in the accompanying drawings. Note that the embodiments to be explained do not unduly limit the present disclosure described in the appended claims. Further, not all of the configurations explained in the embodiments are necessarily the essential component elements of the present disclosure. 
     1. Configurations of Electronic Component Handler and Electronic Component Tester 
     First, referring to  FIGS. 1, 2, 3, 4, 5, and 6 , the electronic component handler and electronic component tester using the electronic component handler according to an embodiment of the present disclosure will be explained.  FIG. 1  is the perspective view showing the schematic configuration of the electronic component tester including the electronic component handler according to the embodiment.  FIG. 2  is the plan view showing the schematic configuration of the electronic component tester including the electronic component handler.  FIG. 3  is the sectional view showing the schematic configuration of the imaging unit.  FIG. 4  is the plan view showing the schematic configuration of the shuttle plate as the example of the holding member.  FIG. 5  is the sectional view along A-A in  FIG. 4  showing the schematic configuration of the shuttle plate.  FIG. 6  is the block diagram showing the schematic configuration of the electronic component tester. 
     Note that, in  FIGS. 1, 2, and 3 , for convenience of explanation, an X-axis, a Y-axis, and a Z-axis as three axes orthogonal to one another are shown by arrows, and the pointer sides of the arrows are referred to as “+ (plus)” and the tail sides are referred to as “− (minus)”. Further, hereinafter, directions parallel to the X-axis are referred to as “X directions”, directions parallel to the Y-axis are referred to as “Y directions”, and directions parallel to the Z-axis are referred to as “Z directions”. Furthermore, hereinafter, for convenience of explanation, the +Z direction side as the upside in  FIG. 1  is referred to as “upper” or “above” and the −Z direction side as the downside is referred to as “lower” or “below”. 
     An XY plane containing the X-axis and the Y-axis is horizontal and the Z-axis is vertical. Further, the upstream side in a transport direction of an electronic component may be simply referred to as “upstream” and the downstream side may be simply referred to as “downstream”. Furthermore, “horizontal” in this specification is not limited to complete horizontal, but includes slight inclinations (e.g. less than ±5°) relative to horizontal unless transport of the electronic component is hindered. 
     A tester  1  as the electronic component tester shown in  FIGS. 1 and 2  is an apparatus that makes a test and an examination (hereinafter, simply referred to as “test”) of electrical characteristics of an electronic component such as an IC (Integrated Circuit) device e.g. a BGA (Ball Grid Array) package and LGA (Land grid array) package, an LCD (Liquid Crystal Display), and a CIS (CMOS Image Sensor). Note that, as below, for convenience of explanation, a case where an IC device is used as the electronic component to be tested will be representatively explained as “IC device  90 ”. 
     The tester  1  as the electronic component tester includes a handler  10  as an electronic component handler that transports the IC device  90  as the electronic component, a test unit  16 , a reporting unit  40  including a display part  41  and a sound output part  45 , an operation unit  42 , and a control apparatus  30 . Further, the tester  1  has a housing unit  5  including a cover housing the handler  10  and the test unit  16 , and door parts  7  provided in the housing unit  5 . Note that the housing unit  5  includes frames, wall parts, and covers. Further, the door parts  7  include push-pull doors, sliding doors, shutters, etc. which are capable of opening and closing between the inside the cover and the outside. 
     The handler  10  has a holding member that may hold the IC device  90  mounted thereon. The holding member has a recessed pocket and houses and holds the IC device  90  in the pocket. The holding member is also called a change kit and corresponds to e.g. a tray  200  used for a feed tray (not shown), a collection tray  19 , or the like, a shuttle plate  100  (see  FIGS. 4 and 5 ) used for an electronic component feed unit  14 , an electronic component collection unit  18 , a temperature control unit  12 , and a rotary stage (not shown), or the like, etc. 
     Note that, as below, the feed tray (not shown), the collection tray  19 , the electronic component feed unit  14 , the electronic component collection unit  18 , the temperature control unit  12 , and the rotary stage (not shown) including the holding members are also referred to as “electronic component holding units” without distinction. Further, in  FIG. 2 , the shuttle plates  100  used for the electronic component feed unit  14 , the electronic component collection unit  18 , the temperature control unit  12 , the rotary stage (not shown), etc. are omitted. 
     The shuttle plate  100  as the holding member shown in  FIGS. 4 and 5  as one configuration example has recesses  111 ,  112 ,  113 ,  114 ,  115 ,  116 ,  117 ,  118  having bottoms recessed from an upper surface of abase material  101 , that is, recessed from an upper surface  100   a  of the shuttle plate  100  as eight pockets housing the IC devices  90 . The eight recesses  111  to  118  open upward, and have inclined surfaces  123  along which the cross-section areas gradually decrease from the upper surface  100   a  toward a lower surface  100   b  and have bottom portions  121  connecting to the inclined surfaces  123  via inner side surfaces  122  provided in the lower parts of the inclined surfaces  123 . That is, each of the recesses  111  to  118  has the bottom portion  121 , the four inner side surfaces  122  stood relative to the bottom portion  121 , and the inclined surfaces  123  inclined from the inner side surfaces  122 . The inclined surfaces  123  and the inner side surfaces  122  of the recesses  111  to  118  function as guide surfaces that guide the IC devices  90  into the recesses  111  to  118  when the IC devices  90  are mounted. Thereby, the IC devices  90  may be easily positioned and held in the shuttle plate  100 . Note that the number of the recesses  111  to  118  as the pockets may be one or more as necessary. 
     Further, in the bottom portions  121  of the recesses  111  to  118 , colored portions  140  colored by e.g. paint, ink, or reaction layers are provided on the entire surfaces of the bottom portions  121 . It is preferable that the colored portions  140  are colored by a different color from the color of the upper surfaces of the IC devices  90  in a plan view from above of the IC devices  90  housed in the recesses  111  to  118 . Further, it is preferable that the colored portions  140  are colored in a different color from the color of the upper surface  100   a  of the shuttle plate  100 . In the embodiment, the upper surfaces of the IC devices  90  are black and the upper surface  100   a  of the shuttle plate  100  is a metallic color, and the bottom portions  121  are colored in red. 
     As described above, the bottom portions  121  of the recesses  111  to  118  are colored, and thereby, in an image captured by an imaging device  51  (see  FIG. 3 ) as an imaging unit, which will be described later, the bottom portions  121  colored by the colored portions  140 , the IC devices  90  housed in the recesses  111  to  118 , and the upper surface  100   a  of the shuttle plate  100  are distinguished more clearly, and calculation accuracy of exposure areas of the bottom portions  121 , which will be described later, may be improved. 
     The inner side surfaces  122  and the inclined surfaces  123  may be subjected to antireflection treatment for reduction of the reflection on the surfaces. Thereby, when the recesses  111  to  118  are imaged by the imaging device  51  as the imaging unit to be described later, entrance of unnecessary light into an image sensor (not shown) of the imaging device  51  may be suppressed. Accordingly, a more clear image may be obtained by the imaging device  51  to be described later. The antireflection treatment is not particularly limited to, but includes e.g. formation of an antireflection film, roughening treatment for increasing scattering of light, and blackening treatment for increasing absorption of light. 
     The sizes, shapes, arrangements of the recesses  111  to  118  are set to correspond to stored data including sizes, shapes, and arrangements of corresponding electronic components, in the embodiment, the IC devices  90 . Specifically, center locations, numbers, arrangement pitches, contour dimensions, depths, etc. are set. Further, regarding the shuttle plate  100 , the numbers of the arranged recesses  111  to  118  are set according to the respective configurations of the attached electronic component feed unit  14 , electronic component collection unit  18 , temperature control unit  12 , and the rotary stage (not shown). The sizes of the recesses  111  to  118  are formed so that the contour shapes of the bottom portions  121  may be slightly larger than the contours of the IC devices  90 . That is, the IC devices  90  are usually housed with slight clearances between the inner side surfaces  122  of the recesses  111  to  118  and themselves in contact with the bottom portions  121 . As described above, the shuttle plate  100  is configured to have specifications corresponding to the respective configurations of the electronic component feed unit  14 , the electronic component collection unit  18 , the temperature control unit  12 , and the rotary stage and the forms of the corresponding electronic components, and replaced and used according to the electronic components to be tested. 
     Note that the shuttle plate  100  exemplified in the embodiment has the eight recesses  111  to  118  arranged in two rows. Further, in the shuttle plate  100  of the embodiment, the configuration provided with the eight recesses  111  to  118  as the pockets is exemplified, however, any number of pockets may be provided. 
     Note that the tray  200  as the holding member has recesses (not shown) with bottoms as pockets housing the IC devices  90  like the above described shuttle plate  100 . Regarding the recesses, like the above described shuttle plate  100 , center locations, numbers, arrangement pitches, contour dimensions, depths, etc. are set according to the sizes and shapes of the IC devices  90 . The tray  200  is replaced and used according to the electronic component to be tested like the above described shuttle plate  100 . 
     As shown in  FIG. 3 , the handler  10  has an image acquisition unit  50  including the imaging device  51  as the imaging unit that can capture the image of the holding member including the shuttle plate  100  and the tray  200  and an illumination device  52 . The image acquisition unit  50  is placed above the recesses  111  to  118  of the tray  200  or the shuttle plate  100 . By the placement of the image acquisition unit  50 , the bottom portions  121  of the recesses  111  to  118  and the IC devices  90  may be imaged in the plan view. 
     Note that the handler  10  of the embodiment holds as a configuration formed except the test unit  16  and a test control part  312  of the control apparatus  30 , which will be described later, from the tester  1  shown in the block diagram of  FIG. 6 . 
     As shown in  FIGS. 1 and 2 , the tester  1  is divided into a tray feed region A 1 , a device feed region A 2 , a test region A 3  in which the test unit  16  is placed, a device collection region A 4 , and a tray removal region A 5 . 
     These respective regions are partitioned from one another by wall parts, shutters, or the like (not shown). The device feed region A 2  is a first chamber defined by the wall parts, shutters, or the like. The test region A 3  is a second chamber defined by the wall parts, shutters, or the like. The device collection region A 4  is a third chamber defined by the wall parts, shutters, or the like. The first chamber forming the device feed region A 2 , the second chamber forming the test region A 3 , and the third chamber forming the device collection region A 4  are respectively configured to secure air-tightness and heat insulation properties. Thereby, the first chamber, the second chamber, and the third chamber may respectively maintain humidity and temperatures as constant as possible. Note that the interiors of the first chamber and the second chamber are respectively controlled at predetermined humidity and predetermined temperatures, and configured so that tests, for example, under a normal temperature environment, a lower temperature environment, and a higher temperature environment may be performed. 
     In the tester  1 , the IC device  90  sequentially passes the respective regions from the tray feed region A 1  to the tray removal region A 5 , and an electrical test is performed in the test region A 3  in the middle. In the electrical test of the embodiment, for example, whether or not the IC device  90  is conducted is checked and whether or not expected output is obtained when a specific signal is input is checked. Thereby, whether or not the IC device  90  is disconnected or short-circuited may be judged. In addition, in the test unit  16 , a test for checking operation of a circuit (not shown) of the IC device  90  or the like may be performed. 
     As below, referring to  FIG. 2 , the tester  1  will be explained sequentially from the tray feed region A 1  to the tray removal region A 5  with respect to each region. 
     1.1. Tray Feed Region 
     The tray feed region A 1  is a region where the tray  200  as the holding member on which a plurality of untested IC devices  90  are arranged and held is fed as a feed tray. In the tray feed region A 1 , many of the trays  200  may be stacked. 
     1.2. Device Feed Region 
     The device feed region A 2  is a region where the plurality of IC devices  90  on the tray  200  are respectively fed from the tray feed region A 1  to the test region A 3 . Note that tray transport mechanisms  11 A,  11 B as transporters that transport the trays  200  are provided across the tray feed region A 1  and the device feed region A 2 . 
     In the device feed region A 2 , the temperature control units  12  having the shuttle plates  100  as the holding members, a feed robot  13  as a transport robot, i.e., a transporter including a transport arm  131  (see  FIG. 3 ), and a feed empty tray transport mechanism  15  are provided. 
     The temperature control unit  12  holds the IC devices  90  on the shuttle plate  100 , performs control of heating or cooling the held IC devices  90 , and adjusts the IC devices  90  to temperatures suitable for the test. In the configuration shown in  FIG. 2 , the two temperature control units  12  are arranged in the Y-axis directions and fixed. The IC devices  90  on the tray  200  transported in from the tray feed region A 1  by the tray transport mechanism  11 A are transported to one of the temperature control units  12  and held on the shuttle plate  100  provided in the temperature control unit  12 . 
     The feed robot  13  as the transport robot is the transporter that transports the IC devices  90 , and supported movably in the X directions, the Y directions, and the Z directions within the device feed region A 2 . The feed robot  13  serves to transport the IC devices  90  between the tray  200  transported in from the tray feed region A 1  and the temperature control unit  12  and transport the IC devices  90  between the temperature control unit  12  and the electronic component feed unit  14 , which will be described later. Note that the feed robot  13  has a plurality of gripping units (not shown) that grip the IC devices  90 . The respective gripping units have suction nozzles and may grip the IC devices  90  by suction. Further, the feed robot  13  may adjust the IC devices  90  to the temperatures suitable for the test by heating or cooling the IC devices  90  like the temperature control unit  12 . 
     The feed empty tray transport mechanism  15  is a transporter as a transport mechanism that transports the empty tray  200  after removal of all IC devices  90  in the X directions. After the transport, the empty tray  200  is returned from the device feed region A 2  to the tray feed region A 1  by the tray transport mechanism  11 B. 
     1.3. Test Region 
     As shown in  FIG. 2 , the test region A 3  is a region where the IC devices  90  are tested. In the test region A 3 , the electronic component feed units  14 , the test unit  16 , a measuring robot  17 , and the electronic component collection units  18  are provided. Note that, in the embodiment, the electronic component feed units  14  and the electronic component collection units  18  are respectively configured to be independently movable, however, these may be coupled or integrally configured to be movable in the same direction. 
     The electronic component feed unit  14  is a transporter that holds the IC devices  90  controlled at a predetermined temperature in the shuttle plate  100  and transports the devices to the vicinity of the test unit  16 . The electronic component feed units  14  can reciprocate along the X directions between the device feed region A 2  and the test region A 3 . Further, in the configuration shown in  FIG. 2 , the two electronic component feed units  14  are arranged in the Y directions. The IC devices  90  on the temperature control unit  12  are transported to one of the electronic component feed units  14  and held. Note that the transport is performed by the feed robot  13 . Further, in the electronic component feed units  14 , the IC devices  90  may be adjusted to the temperatures suitable for the test by heating or cooling of the IC devices  90  like the temperature control units  12 . 
     The measuring robot  17  is a transporter that transports the IC devices  90  and movably supported within the test region A 3 . The measuring robot  17  may transport the IC devices  90  on the electronic component feed unit  14  transported from the device feed region A 2  onto the test unit  16  and mount the devices thereon. When the IC devices  90  are tested, the measuring robot  17  presses the IC devices  90  toward the test unit  16 , and thereby, brings the IC devices  90  into contact with the test unit  16 . Therefore, as will be described later, terminals of the IC devices  90  and probe pins of the test unit  16  are electrically coupled. Note that the measuring robot  17  has a plurality of gripping units (not shown) that grip the IC devices  90 . The respective gripping units have suction nozzles and may grip the IC devices  90  by suction. Further, the measuring robot  17  may adjust the IC devices  90  to the temperatures suitable for the test by heating or cooling the IC devices  90  like the temperature control unit  12 . In the embodiment, the single measuring robot  17  is provided as shown in the drawing, however, two or more of the measuring robots may be provided. 
     The electronic component collection unit  18  is a transporter that holds the IC devices  90  after the test in the test unit  16  and transports the devices to the device collection region A 4 . The electronic component collection units  18  can reciprocate along the X directions between the test region A 3  and the device collection region A 4 . Further, in the configuration shown in  FIG. 2 , the two electronic component collection units  18  are arranged in the Y directions like the electronic component feed units  14 . The IC devices  90  on the test unit  16  are transported to one of the electronic component collection units  18  and held. Note that the transport is performed by the measuring robot  17 . 
     1.3.1. Test Unit 
     The test unit  16  is a unit that makes tests and examinations of electrical characteristics of the IC devices  90  and a holding unit that holds the IC devices  90  when testing the IC devices  90 . A plurality of the probe pins electrically coupled to the terminals of the IC devices  90  with the IC devices  90  held are provided in the test unit  16 . The terminals of the IC devices  90  and the probe pins are brought into electrical contact and coupled, and an electrical test of the IC device  90  is performed via the probe pins. Further, in the test unit  16 , the IC devices  90  may be adjusted to the temperatures suitable for the test by heating or cooling of the IC devices  90  like the temperature control unit  12 . 
     1.4. Device Collection Region 
     As shown in  FIG. 2 , the device collection region A 4  is a region where the tested IC devices  90  are collected. In the device collection region A 4 , collection trays  19 , a collection robot  20  as a transport robot, and collection empty tray transport mechanisms  21  are provided. Further, in the device collection region A 4 , three empty trays  200  are prepared. 
     The collection tray  19  is one of the electronic component holding units on which the IC devices  90  are held. The collection trays  19  are fixed within the device collection region A 4  and three of the trays are arranged side by side in the X directions in this configuration. Further, the empty trays  200  are the electronic component holding units on which the IC devices  90  are mounted and three of the trays are arranged side by side in the X directions. The IC devices  90  on the electronic component collection unit  18  moved to the device collection region A 4  are transported to one of these collection trays  19  and empty trays  200  and held. Thereby, the IC devices  90  are collected with respect to each test result and sorted. The sorting of the IC devices  90  based on the test results is performed by the collection robot  20 . The collection robot  20  sorts the IC devices  90  according to a command by the control apparatus  30 , which will be described later. 
     The collection robot  20  as the transport robot is a transporter that transports the IC devices  90 , and supported movably in the X directions, the Y directions, and the Z directions within the device collection region A 4 . The collection robot  20  may transport the IC devices  90  from the electronic component collection unit  18  to the collection tray  19  or the empty tray  200 . Note that the collection robot  20  has a plurality of gripping units (not shown) that grip the IC devices  90 . The respective gripping units have suction nozzles and may grip the IC devices  90  by suction. 
     The collection empty tray transport mechanism  21  is a transporter as a transport mechanism that transports the empty tray  200  transported from the tray removal region A 5  in the X directions. Then, after the transport, the empty tray  200  is placed in a location where the IC devices  90  are collected. That is, the empty tray  200  after transport may be one of the above described three empty trays  200 . 
     1.5. Tray Removal Region 
     The tray removal region A 5  is a region where the tray  200  on which the plurality of tested IC devices  90  are arranged is collected and removed. In the tray removal region A 5 , many of the trays  200  may be stacked. Note that tray transport mechanisms  22 A,  22 B that transport the trays  200  one by one are provided across the device collection region A 4  and the tray removal region A 5 . The tray transport mechanism  22 A transports the tray  200  with the tested IC devices  90  mounted thereon from the device collection region A 4  to the tray removal region A 5 . The tray transport mechanism  22 B transports the empty tray  200  for collection of the IC devices  90  from the tray removal region A 5  to the device collection region A 4 . 
     In the first chamber, the second chamber, and the third chamber of the above described respective regions A 1  to A 5 , temperature sensors that detect temperatures within the chambers, humidity sensors that detect relative humidity within the chambers, and oxygen concentration sensors that detect oxygen concentrations within the chambers (not shown) are respectively provided. Note that, in the embodiment, the temperature sensors, the humidity sensors, and the oxygen concentration sensors are provided in the respective chambers of the first chamber, the second chamber, and the third chamber, however, the temperature sensors, the humidity sensors, and the oxygen concentration sensors may be provided in any locations. 
     Further, the tester  1  has a dry air supply mechanism (not shown). The dry air supply mechanism is configured to supply a low-humidity gas including the air and nitrogen (hereinafter, also referred to as “dry air”) to the first chamber, the second chamber, and the third chamber. Accordingly, the dry air is supplied as necessary, and thereby, condensation and freezing of the IC devices  90  may be prevented. 
     Note that, in the above described embodiment, the tester  1  is configured to perform tests under a normal temperature environment, a lower temperature environment, and a higher temperature environment, however, may be configured to perform tests at least under one environment of the above described three environments. For example, the configurations for the lower temperature environment including the wall parts, shutters, hygrometers, oximeters, and dry air may not necessarily provided. 
     1.6. Control Apparatus 
     As shown in  FIG. 6 , the control apparatus  30  has a function of controlling the respective units of the tester  1  and includes a control unit  31  and a memory unit  32 . 
     The control unit  31  includes e.g. a CPU (Central Processing Unit) and has a drive control part  311 , the test control part  312 , an imaging control part  313 , an area data calculation part  314 , a determination part  315 , and a reporting processing part  316 . The memory unit  32  includes e.g. a ROM (read only memory) and a RAM (Random Access Memory). 
     The control unit  31  has a function of displaying driving of the respective units, forming the tester  1 , test results, image data, etc. on the display part  41 , a function of performing processing according to input from the operation unit  42  executed by a user, etc. 
     Further, the control unit  31  performs imaging of the trays  200  and the shuttle plates  100  as holding members and determines presence or absence of the IC devices  90  housed in the recesses  111  to  118  of the trays  200  and the shuttle plates  100  or whether or not positions including displacement and tilts of the IC devices  90  are good. Specifically, the control unit  31  compares a reference area of the bottom portion  121  calculated from a preset plan view area of the IC device  90  and a plan view area of the bottom portion  121  colored by the colored portion  140  with a detection area of the bottom portion  121  detected from the image captured by giving an instruction to the imaging device  51 , and determines presence or absence of the IC devices  90  housed in the recesses  111  to  118  or whether or not the positions of the IC devices  90  housed in the recesses  111  to  118  are good. Note that the determination and the determination method will be explained later in detail. Then, when making a determination as being abnormal in a determination result, the control unit  31  reports by sending a reporting signal to the reporting unit  40  or stops the operation of the tester  1  including the transport operation of the trays  200  and the shuttle plates  100 . Note that the plan view refers to a view of an object in a location apart along a normal from the object when a line extending in a direction orthogonal to a contact plane on a surface of the object is the normal. Further, the plan view area refers to a surface area of the object in the plan view. 
     Note that the control unit  31  has a plurality of execution time patterns relating to execution times of the above described determination and may select the execution time of the determination from the plurality of execution time patterns. In this manner, the above described determination is performed at the execution time of the determination selected from the plurality of set execution time patterns, and thereby, the efficient determination may be made. 
     Further, as an example of the above described execution time of determination, the control unit  31  may set the execution time to an activation start time including reactivation after pausing of the handler  10  or the tester  1 . In this manner, the above described determination is made at the activation start time including reactivation after pausing of the handler  10  or tester  1 , and thereby, proper operation of the tester may be performed based on presence or absence of the IC devices  90  housed in the recesses  111  to  118  or whether or not the positions of the IC devices  90  housed in the recesses  111  to  118  are good. 
     Furthermore, as an example of the above described execution time of determination, the control unit  31  may set the execution time to a time when the door part  7  of the handler  10  or the tester  1  is closed in opening and closing operation, in other words, a time when the opened door part  7  is closed. In this manner, the above described determination is made based on the closing operation of the door part  7 , and thereby, proper operation of the tester may be performed based on presence or absence of the IC devices  90  housed in the recesses  111  to  118  or whether or not the positions of the IC devices  90  housed in the recesses  111  to  118  are good after the user opens the door part  7  and performs some process. 
     The drive control part  311  controls driving etc. of the tray transport mechanisms  11 A,  11 B, the temperature control units  12 , the feed robot  13 , the feed empty tray transport mechanism  15 , the electronic component feed units  14 , the test unit  16 , the measuring robot  17 , the electronic component collection units  18 , the collection robot  20 , the collection empty tray transport mechanisms  21 , and the tray transport mechanisms  22 A,  22 B. 
     The test control part  312  may perform e.g. tests as to whether or not electrical operations of the IC devices  90  placed in the test unit  16  are good or the like based on programs stored within the memory unit  32 . 
     The imaging control part  313  controls driving etc. of the image acquisition unit  50  that performs imaging of the tray  200  or the shuttle plate  100  as the holding member. Further, the imaging control part  313  processes the signal from the imaging device  51 , digitalizes the image of the tray  200  or the shuttle plate  100  acquired by the image acquisition unit  50 , and generates image data. 
     The area data calculation part  314  acquires the preset plan view area of the IC device  90  and the plan view area of the bottom portion  121  colored by the colored portion  140  from the memory unit  32 , and calculates the reference area as the exposure area of the bottom portion  121  from the acquired plan view area of the IC devices  90  and plan view area of the bottom portion  121 . Note that the reference area includes the area of the bottom portion  121  exposed around the IC device  90  when the IC device  90  is held in the recesses  111  to  118  and the area of the bottom portion  121  exposed around the IC device  90  when the IC device  90  is not held in the recesses  111  to  118 . Further, the plan view area of the IC devices  90  and the plan view area of the bottom portion  121  colored by the colored portion  140  may be set from an image captured by the imaging device  51  when the handler  10  is preliminarily operated and the IC devices  90  are transported onto the shuttle plate  100 . 
     Furthermore, the area data calculation part  314  calculates e.g. a detection area as the plan view area of the bottom portion  121  exposed around the IC device  90  housed in the recesses  111  to  118  of the shuttle plate  100  based on two-dimensional image data formed by digitalization of the image of the recesses  111  to  118  in the tray  200  or the shuttle plate  100  captured by the image acquisition unit  50  using the imaging device  51 . 
     The determination part  315  determines presence or absence of the IC devices  90  housed in the recesses  111  to  118  or whether or not the positions including displacement and tilts of the IC devices  90  housed in the recesses  111  to  118  are good based on the reference area of the bottom portion  121  and the detection area as the plan view area of the bottom portion  121  exposed around the IC device  90  calculated by the area data calculation part  314 . Note that, in the comparison between the reference area of the bottom portion  121  and the detection area of the bottom portion  121 , the determination part  315  may apply a method of comparing the respective areas and making a determination based on whether or not the difference thereof is within a predetermined range or a method of obtaining a ratio of the detection area of the bottom portion  121  to the reference area of the bottom portion  121  and making a determination based on whether or not the ratio is within a predetermined range. The determination part  315  determines the presence or absence of the IC devices  90  or whether or not the positions including displacement and tilts of the IC devices  90  are good by comparison between e.g. the reference area of the bottom portion  121  and the detection area of the bottom portion  121 . 
     The specific determination method on the above described determination by the determination part  315  will be explained later in detail. The determination by the determination part  315  may be similarly applied and executed in the tray  200 . 
     Note that the determination part  315  may select the recesses  111  to  118  as an object of determination in the determination as to the presence or absence of the IC devices  90  or whether or not the positions including displacement and tilts of the IC devices  90  are good. Specifically, the determination part  315  may select the object of determination for the determination as to the presence or absence of the IC devices  90  or whether or not the positions including displacement and tilts of the IC devices  90  are good to be all of the recesses  111  to  118  or one of the recesses, e.g. one recess  111 . The determination location is selected, and thereby, the determination may be made efficient. Note that, for the selection of the determination location, a checkbox of a selection window (not shown) displayed on the display part  41  or the like may be used. Further, the above described selection of the determination location may be similarly applied to the tray  200 . 
     When the presence or absence of the IC devices  90  in the recesses  111  to  118  or whether or not the positions including displacement and tilts of the IC devices  90  housed in the recesses  111  to  118  are good is determined as being abnormal in the determination by the determination part  315 , the reporting processing part  316  generates reporting information based on the determination result and transmits the generated reporting information to the reporting unit  40 . 
     The memory unit  32  stores programs, data, etc. for various kinds of processing by the control unit  31 . Further, the memory unit  32  stores the stored data of the sizes, shapes, and arrangements of the corresponding electronic components, in the embodiment, the IC devices  90  and arrangement data of the recesses  111  to  118  based thereon as setup recipes. Furthermore, the memory unit  32  stores the plan view area of the set IC device  90  and the plan view area of the bottom portion  121  colored by the colored portion  140  in the set recesses  111  to  118 . In addition, the memory unit  32  stores threshold values for determinations set as determination criteria in the determination part  315 . 
     The plan view area of the IC device  90  and the plan view area of the bottom portion  121  colored by the colored portion  140  in the recesses  111  to  118  stored in the memory unit  32  may be set using preset data or input by the user using the operation unit  42  or the like. Further, the plan view area of the IC device  90  and the plan view area of the bottom portion  121  colored by the colored portion  140  in the recesses  111  to  118  may be set from an image captured by the imaging device  51  when the handler  10  is preliminarily operated. 
     1.7. Reporting Unit 
     As shown in  FIGS. 1 and 6 , the reporting unit  40  has the display part  41  that can display images, the sound output part  45  that can output voice, beep sound, etc. The reporting unit  40  may issue reporting information on the determination result generated by the reporting processing part  316  as e.g. warning display using images of characters and illustrations in the display part  41  or output of voice and warning sound in the sound output part  45 . 
     The display part  41  displays driving statuses of the respective units and test results or determination results as to the presence or absence of the IC devices  90  or whether or not the positions are good in the tray  200  or the shuttle plate  100 . The display part  41  may include e.g. a liquid crystal display panel, a display panel of organic EL, or the like. The user may set various kinds of processing and conditions of the tester  1  and confirm results via the display part  41 . Additionally, the user may confirm the reporting information of the determination results as to the presence or absence of the IC devices  90  or whether or not the positions are good in the tray  200  or the shuttle plate  100  by image display of characters and illustrations. 
     The sound output part  45  includes a speaker (not shown) or the like and may output and report the information of the determination results as to the presence or absence of the IC devices  90  or whether or not the positions are good in the tray  200  or the shuttle plate  100  as sound information including voice and beep sound. 
     1.8. Operation Unit 
     The operation unit  42  is an input device including a keyboard and a mouse, and outputs an operation signal according to the operation by the user to the control unit  31 . Therefore, the user may give instructions of various kinds of processing etc. to the control unit  31  using the keyboard and the mouse. Note that, in the embodiment, the keyboard and the mouse are used as the operation unit  42 , however, the operation unit  42  is not limited to those, but may be e.g. an input device including a trackball and a touch panel. 
     1.9. Image Acquisition Unit 
     The image acquisition unit  50  has a function of acquiring the images of the trays  200  or the shuttle plates  100  placed in the electronic component holding units and the recesses  111  to  118 . As shown in  FIG. 2 , the image acquisition units  50  are provided in the feed robot  13  and the collection robot  20  as the transport robots in the device feed region A 2  and the device collection region A 4 . That is, the image acquisition unit  50  is provided in a location where the unit can acquire the images of the trays  200  and the shuttle plates  100  placed in the electronic component holding units. 
     Specifically, as shown in  FIG. 3 , the image acquisition units  50  are attached to the transport arms  131  of the feed robot  13  and the collection robot  20 . The image acquisition units  50  are provided above the electronic component holding units. Note that, in the embodiment, when the respective feed robot  13  and collection robot  20  are regarded as the single image acquisition units  50 , the number of image acquisition units  50  is two, however, any number of image acquisition units  50  may be provided. 
     The image acquisition units  50  are supported by the feed robot  13  and the collection robot  20  to be placed above the recesses  111  to  118  of the trays  200  or the shuttle plates  100  placed in the electronic component holding units. Thereby, the image acquisition unit  50  may image the recesses  111  to  118  in the plan view and improve shape accuracy of the captured image. 
     The image acquisition unit  50  has the imaging device  51  as the imaging unit and the illumination device  52 . Note that the illumination device  52  may continuously illuminate or intermittently emit strong light (flash) as long as the device may control the exposure time. 
     The imaging device  51  as the imaging unit has an image sensor that receives light reflected by the tray  200  or the shuttle plates  100  placed in the electronic component holding unit or the IC devices  90  and converts the light into an electrical signal. The imaging device  51  is not particularly limited to, but includes e.g. a camera using a CCD (Charge Coupled Device) image sensor as the image sensor and an electronic camera (digital camera) using a CMOS (Complementary Metal Oxide Semiconductor) image sensor as the image sensor. The image data is analyzed using e.g. differential interferometry, Fourier transform, or the like, and thereby, microscopic shapes and shapes hard to be seen can be emphasized and detection sensitivity of the shapes can be improved. Further, microscopic scratches and scratches hard to be seen can be emphasized and detection sensitivity of the scratches can be improved. 
     The imaging device  51  is configured to have an imaging area in a size substantially equal to the size of the recesses  111  to  118  provided in the tray  200  or the shuttle plate  100  to a size substantially equal to or larger than the size of the tray  200  or the shuttle plate  100 . 
     It is preferable that the imaging device  51  includes an optical system such as an optical lens or autofocus mechanism (not shown). Thereby, for example, even when the heights (heights in the Z directions) of the tray  200  and the shuttle plate  100  relative to the imaging device  51  vary, clear images may be obtained. 
     The illumination device  52  is a light source driven at imaging of the tray  200  or the shuttle plate  100  by the imaging device  51  and irradiating the tray  200  or the shuttle plate  100  with light. By the illumination device  52 , darkness of the image due to insufficient illumination may be suppressed and the clearer image may be obtained. 
     In the embodiment, the illumination device  52  has an annular shape and is placed around the imaging device  51 . Thereby, the tray  200  or the shuttle plate  100  may be uniformly irradiated with light. Note that the shape and the placement of the illumination device  52  are not limited to those of the above described configuration. 
     The image acquisition unit  50  having the above described configuration irradiates the tray  200  or the shuttle plate  100  placed in the electronic component holding unit and the IC devices  90  with light by the illumination device  52 , and images the recesses  111  to  118  of the tray  200  or the shuttle plate  100  and the IC devices  90  by the imaging device  51 . The signal from the imaging device  51  is taken into the imaging control part  313  of the above described control unit  31 . The imaging control part  313  processes the signal from the imaging device  51 , and generates the images of the recesses  111  to  118  of the tray  200  or the shuttle plate  100  and the IC devices  90  as two-dimensional image data. 
     2. Determination Method by Control Unit 
     As below, a series of operation of the electronic handler having the above described configuration and the electronic component tester using the electronic handler will be explained, and a method of determining the presence or absence of the IC devices  90  or whether or not the positions including displacement and tilts of the IC devices  90  are good by the control unit  31  will be explained with reference to  FIGS. 7, 8, 9, 10, 11, and 12 .  FIG. 7  is the flowchart showing the checking method of the IC device as the electronic component housed in the recess.  FIG. 8  is the enlarged plan view showing the recess of the shuttle plate.  FIG. 9  is the enlarged plan view showing the recess of the shuttle plate with the IC device housed therein.  FIG. 10  is the enlarged sectional view showing the recess of the shuttle plate with the IC device housed therein.  FIG. 11  is the plan view showing the case where the housing location of the IC device is displaced.  FIG. 12  is the explanatory chart relating to the determination of the position or presence or absence of the IC device. Note that the respective elements forming the handler  10  as the above described electronic component handler and the tester  1  as the electronic component tester will be explained using the same signs. Further, as below, the recess  111  will be explained as a representative example of the recesses  111  to  118 , and the same applies to the other recesses  112  to  118 . 
     First, prior to the activation of the tester  1 , the user sets the plan view area of the IC device  90  to be transported as the electronic component of the test object and, as shown in  FIG. 8 , sets the plan view area of the bottom portion  121  colored by the colored portion  140  in the recess  111  recessed from the upper surface  100   a  of the shuttle plate  100  (step S 101 ). Note that the recess  111  has the bottom portion  121 , the inner side surfaces  122  stood from the bottom portion  121 , and the inclined surfaces  123  inclined from the inner side surfaces  122  to the upper surface  100   a . Further, the plan view area of the IC device  90  and the plan view area of the bottom portion  121  may be set by reading from the setup recipe stored in the memory unit  32  or input by the user using the operation unit  42  or the like. 
     The control unit  31  may calculate the plan view area of the IC device  90  and the plan view area of the bottom portion  121  by preliminary operation of the handler  10  based on the captured image. In this manner, the plan view area of the IC device  90  and the plan view area of the bottom portion  121  are obtained based on the images by direct imaging of the recess  111  of the shuttle plate  100  and the IC device  90  housed in the recess  111 , and thereby, the plan view areas according to the actual state may be obtained. 
     Then, the area data calculation part  314  of the control unit  31  calculates the reference area of the bottom portion  121  as an area of a colored portion  140   f  exposed around the IC device  90  when the IC device  90  is housed in the recess  111  as shown in  FIGS. 9 and 10  from the plan view area of the set IC device  90  and the plan view area of the colored bottom portion  121  (step S 102 ). 
     Note that the reference area of the bottom portion  121  may be calculated based on the plan view area of the IC device  90  and the colored portion  140  set from the image of the IC device  90  transported to the shuttle plate  100  by preliminary operation of the handler  10  and captured by the imaging device  51 . Here, in other words, the reference area is an area set as a reference value of the colored portion  140   f  exposed as seen from above between the outer edge of the IC device  90  and the inner side surfaces  122  of the recess  111 . 
     Then, the control unit  31  activates the handler  10  and images the transported shuttle plate  100  and the IC device  90  by the imaging device  51 . In other words, the unit images the recess  111  of the shuttle plate  100  and the IC device  90  housed in the recess  111  by the imaging device  51 , and acquires the images of those (step S 103 ). The captured images contain the bottom portion  121  without the IC device  90  housed therein, i.e., the image of the entire colored portion  140  and the bottom portion  121  with the IC device  90  housed therein, i.e., the bottom portion  121  exposed around the IC device  90 . 
     Then, the area data calculation part  314  of the control unit  31  calculates the detection area detected based on the images captured at step S 103  (step S 104 ). Note that the detection area calculated here is the real area of the colored portion  140   f  exposed as seen from above between the outer edge of the IC device  90  and the inner side surfaces  122  of the recess  111 , in the position of the IC device  90  actually housed in the recess  111 . 
     Then, the determination part  315  of the control unit  31  compares the reference area of the bottom portion  121  of the recess  111  applied to the IC device  90  moving as the test object with the detection area of the bottom portion  121  detected from the images captured by the imaging device  51  according to an instruction (step S 105 ). 
     Then, the determination part  315  determines whether or not the comparison result between the reference area of the bottom portion  121  and the detection area of the bottom portion  121  is within a set predetermined range (step S 106 ). At step S 106 , when the comparison result between the reference area of the bottom portion  121  and the detection area of the bottom portion  121  is within the set predetermined range (step S 106 : Yes), the determination part  315  determines a state of “good” as to the housing of the IC device  90  in the recess  111  or the position of the IC device  90  housed in the recess  111  (step S 107 ). 
     Specifically, the determination at step S 106 : Yes shows a state in which the IC device  90  is housed in the recess  111  when the housing of the IC device  90  in the recess  111  is set to “presence”, or a state in which the IC device  90  is not housed in the recess  111  when the housing of the IC device  90  in the recess  111  is set to “absence”. Or, the determination at step S 106 : Yes shows a state in which no displacement or tilt is produced in the position of the IC device  90  housed in the recess  111  (see  FIG. 9 ). 
     Note that, in the determination by the comparison between the reference area of the bottom portion  121  and the detection area of the bottom portion  121  at step S 106 , there are a method of simply comparing the respective areas and making a determination based on whether or not the difference thereof is within the predetermined range and a method of obtaining a ratio of the detection area of the bottom portion  121  to the reference area of the bottom portion  121  and making a determination based on whether or not the ratio is within the predetermined range, and either one may be used. 
     Here, in the method of obtaining the ratio of the detection area of the bottom portion  121  to the reference area of the bottom portion  121  and making the determination based on whether or not the ratio is within the predetermined range, a reference ratio of the bottom portion  121  calculated from the plan view area of the set IC device  90  and the plan view area of the bottom portion  121  and a detection ratio of the bottom portion  121  detected from the images captured by the imaging device  51  are compared, and a determination is made based on whether or not the ratio thereof is within the predetermined range. 
     Further, as shown in  FIG. 12 , in the determination at step S 106 , the determination is made with distinction between the case were “presence” of the IC device  90  as the electronic component is set, i.e., the case where “presence” of the IC device  90  is normal and the case were “absence” of the IC device  90  as the electronic component is set, i.e., the case where “absence” of the IC device  90  is normal. Note that, in  FIG. 12 , of the above described two determination methods, the latter method of obtaining the ratio of the detection area of the bottom portion  121  to the reference area of the bottom portion  121  and making the determination based on whether or not the ratio is within the predetermined range is exemplified. 
     First, the case where “presence” of the IC device  90  is normal shown in the upper part of  FIG. 12  is explained. In this example, regarding the ratio of the detection area to the reference area of the bottom portion  121 , “5%” is set as a threshold value for distinction between normal and abnormal. When the ratio of the detection area is equal to or smaller than 5%, that is, when the difference between the detection area and the reference area is smaller, a determination as being normal is made. In this example, for instance, when the ratio of the detection area is equal to or smaller than 5%, a determination that the displacement and tilt of the housed IC device  90  are within a normal range is made and, when the ratio is larger than 5%, a determination that the displacement and tilt of the housed IC device  90  are within an abnormal range is made. Or, when the ratio of the detection area is larger than 95%, a determination that the IC device  90  is not housed is made, not the determination that the displacement and tilt of the housed IC device  90  are abnormal. 
     Next, the case where “absence” of the IC device  90  is normal shown in the lower part of  FIG. 12  is explained. In this example, regarding the ratio of the detection area to the reference area of the bottom portion  121 , “95%” is set as a threshold value for distinction between normal and abnormal. When the ratio of the detection area is larger than 95%, that is, when the difference between the detection area and the reference area is larger, a determination as being normal is made. In this example, for instance, when the ratio of the detection area is larger than 95%, a normal state in which the IC device  90  is not housed is determined and, when the ratio is equal to or smaller than 95%, the so-called abnormal state in which the IC device  90  that is not supposed to be housed is housed is determined. 
     Then, when confirming the state of “good” at step S 107 , the control unit  31  starts operation of the tester  1  including the transport operation of the trays  200  and the shuttle plates  100  (step S 108 ). 
     Or, at step S 106 , when the comparison result between the reference area of the bottom portion  121  and the detection area of the bottom portion  121  is not within the set predetermined range (step S 106 : No), the determination part  315  determines a state of “poor” of the housing of the IC device  90  in the recess  111  or the position of the IC device  90  housed in the recess  111  (step S 109 ). 
     Specifically, the determination at step S 106 : No shows a state in which the IC device  90  is not housed in the recess  111  when the housing of the IC device  90  in the recess  111  is set to “presence”, or a state in which the IC device  90  is housed in the recess  111  when the housing of the IC device  90  in the recess  111  is set to “absence”. Or, the determination at step S 106 : No shows a state in which displacement or tilt is produced in the position of the IC device  90  housed in the recess  111  (see  FIG. 11 ). 
     Note that the IC device  90  in the state shown in  FIG. 11  is housed with displacement toward the inclined surface  123  side from the side surface  122  of the recess  111 . The state shows that a part of the device runs on the inclined surface  123  and the device partially floats from the bottom portion  121 , that is, the device tilts as seen from the section direction. In this regard, the area of a colored portion  140   fa  exposed around the IC device  90  including the opposite side to the inclined surface  123  at which the IC device  90  is displaced is larger. 
     Then, when confirming the state of “poor” at step S 109 , when the determination of the presence or absence, the position, or the like of the IC device  90  is abnormal is made, the control unit  31  generates reporting information for reporting the abnormality based on the determination result, and reports the generated reporting information from the reporting unit  40  or stops the operation of the tester  1  including the transport operation of the trays  200  and the shuttle plates  100  (step S 110 ). 
     Through the above described steps, a series of procedures of the method of determining the presence or absence of the IC devices  90  or whether or not the positions including displacement and tilts of the IC devices  90  are good by the control unit  31  of the tester  1  ends. 
     According to the handler  10  and the tester  1  using the handler  10  having the above described configurations, the following effects may be exerted. The handler  10  and the tester  1  using the handler  10  may sense slight exposure of the bottom portions  121  because the bottom portions  121  of the recesses  111  to  118  are colored by the colored portions  140 , and the differences between the colored bottom portions  121  and the IC devices  90  as the electronic components housed in the recesses  111  to  118 , the upper surface  100   a  of the shuttle plate  100 , etc. are clearer in the images captured by the imaging units  51 . Therefore, the handler  10  and the tester  1  using the handler  10  compare the reference areas of the bottom portions  121  with the detection areas of the bottom portions  121  or obtain the ratios of the detection areas of the bottom portions  121  to the reference areas of the bottom portions  121  and determine whether or not the ratios are within the predetermined range in the images captured by the imaging devices  51 , and thereby, may determine the presence or absence of the IC devices  90  housed in the recesses  111  to  118  or whether or not the positions of the IC devices  90  housed in the recesses  111  to  118  are good. Therefore, compared to the method of image matching of comparing test image data with reference image data of related art, shape recognition or comparison between the recognized shape image and the reference image is unnecessary, and thus, in the handler  10  and the tester  1  using the handler  10 , the time taken for the determination as to the presence or absence of the IC devices  90  housed in the recesses  111  to  118  or whether or not the positions of the IC devices  90  housed in the recesses  111  to  118  are good may be made shorter. 
     Further, when an abnormality is determined in the above described determinations, the handler  10  and the tester  1  using the handler  10  generate the reporting information for reporting the abnormality based on the determination result, and report the generated reporting information from the reporting unit  40  or stop the operation of the tester  1  including the transport operation of the trays  200  and the shuttle plates  100 . Thereby, when the determination that the IC devices  90  are not housed in the recesses  111  to  118  or the positions of the IC devices  90  housed in the recesses  111  to  118  are skewed is made, the user may properly perceive that and malfunction of the handler  10  and the tester  1  using the handler  10  may be suppressed. 
     Note that, in the above described embodiment, the configuration in which the colored portions  140  are provided on the bottom portions  121  of the recesses  111  to  118  provided in the shuttle plate  100  as the holding member is explained as an example. In addition, as shown in  FIG. 13 , inclined surface colored portions  141  may be provided on the inclined surfaces  123 . It is preferable that the inclined surface colored portions  141  provided on the inclined surfaces  123  are formed in a different color from that of the bottom portions  121 . That is, it is preferable that the color of the bottom portions  121  and the color of the inclined surfaces  123  are made different. According to the configuration, even when imaging of the bottom portions  121  of the recesses  111  to  118  behind the IC devices  90  is difficult due to a viewing angle formed according to a location relationship between the placement location of the imaging unit  51  and the part to be imaged, the areas of the inclined surfaces  123  colored in the different color by the inclined surface colored portions  141  are used, and thereby, whether or not the positions of the IC devices  90  are good may be determined. Note that  FIG. 13  is the sectional view showing the configuration example in which inclined surfaces of the recess are colored. 
     The imaging device  51  as the imaging unit may perform imaging with respect to each of the plurality of recesses  111  to  118  in advance and acquire the plan view areas of the IC devices  90  and the plan view areas of the bottom portions  121  with respect to each of the recesses  111  to  118 . Specifically, the imaging device  51  may have a movable unit (not shown) that may vary the imaging direction or a moving unit (not shown) that can move the imaging device  51  may be provided. As described above, the imaging device  51  performs imaging with respect to each of the recesses  111  to  118 , and thereby, the reference areas based on different images with respect to each of the recesses  111  to  118  may be acquired to address tilt differences in the optical axis of the imaging device  51  depending on the respective locations of the plurality of recesses  111  to  118 , in other words, changes of images due to differences of viewing angles. 
     Further, a plurality of the imaging devices  51  as imaging units may be placed. For example, the plurality of imaging devices  51  assigned to the plurality of recesses  111  to  118  may be provided. The plurality of imaging devices are provided, and thereby, the viewing angles of the imaging devices  51  may be made smaller and accuracy of the captured images may be made higher. 
     As below, the details derived from the above described embodiments will be described as respective embodiments. 
     Embodiment 1 
     An electronic component handler according to the embodiment is an electronic component handler that transports an electronic component to a test unit, including a holding member including a recess having a colored bottom portion and housing the electronic component in the recess, an imaging unit that images the recess, and a control unit that compares a reference area of the bottom portion previously calculated from a plan view area of the electronic component and a plan view area of the bottom portion with a detection area of the bottom portion detected from an image captured by the imaging unit, and determines presence or absence of the electronic component housed in the recess or whether or not a position of the electronic component housed in the recess is good. 
     According to the embodiment, the bottom portion of the recess is colored, and thereby, in the captured image, the difference between the bottom portion and another part such as the electronic component housed in the recess is clearer. Accordingly, even the colored portion slightly exposed around the electronic component may be sensed, and the presence or absence of the electronic component housed in the recess or whether or not the position of the electronic component housed in the recess is good may be determined by comparison between the reference area of the bottom portion and the detection area of the bottom portion. Therefore, compared to the method of image matching of comparing test image data with reference image data, shape recognition or comparison between the recognized shape image and the reference image is unnecessary, and thus, the time taken for the determination may be made shorter. 
     Embodiment 2 
     In the electronic component handler according to the embodiment, a color coloring the bottom portion may be different from a color of the electronic component. 
     According to the embodiment, in the captured image, distinction between the bottom portion and the electronic component housed in the recess is clearer, and calculation accuracy of the area of the bottom portion slightly exposed around the electronic component may be improved. 
     Embodiment 3 
     In the electronic component handler according to the embodiment, a color coloring the bottom portion may be different from a color of the holding member. 
     According to the embodiment, distinction between the bottom portion and the holding member around the recess is clearer and calculation accuracy of the exposure area of the bottom portion may be improved. 
     Embodiment 4 
     In the electronic component handler according to the embodiment, the imaging unit may be placed above the recess. 
     According to the embodiment, the bottom portion and the electronic component may be imaged in the plan view and shape accuracy of the captured image may be improved. 
     Embodiment 5 
     In the electronic component handler according to the embodiment, the control unit may acquire the plan view area of the electronic component and the plan view area of the bottom portion from an image previously captured by the imaging unit. 
     According to the embodiment, the plan view area of the electronic component and the plan view area of the bottom portion are obtained based on the images by direct imaging of the recess of the holding member and the electronic component housed in the recess, and thereby, the plan view area of the electronic component and the plan view area of the bottom portion according to an actual state may be obtained. 
     Embodiment 6 
     In the electronic component handler according to the embodiment, a plurality of the recesses may be provided, the imaging unit may previously image with respect to each of the recesses, and the control unit may acquire the plan view area of the electronic component and the plan view area of the bottom portion in correspondence with the captured images of the respective recesses. 
     According to the embodiment, the reference areas based on different images with respect to each of the recesses may be acquired to address tilt differences in the optical axis of the imaging unit depending on the respective locations of the plurality of recesses, in other words, changes of images due to differences of viewing angles. 
     Embodiment 7 
     In the electronic component handler according to the embodiment, the image previously captured by the imaging unit may include an image of the bottom portion in which the electronic component is not housed and an image of the bottom portion in which the electronic component is housed. 
     According to the embodiment, the reference image of the bottom portion and the detection area of the bottom portion may be calculated from the image of the bottom portion in which the electronic component is not housed and the image of the bottom portion in which the electronic component is housed. 
     Embodiment 8 
     In the electronic component handler according to the embodiment, the holding member may include an inclined surface connecting to the bottom portion, and the inclined surface may be colored in a different color from that of the bottom portion. 
     According to the embodiment, when imaging of the bottom portion of the recess behind the electronic component is difficult due to a viewing angle, the area of the inclined surface colored in the different color is used, and thereby, whether or not the position of the electronic component is good may be determined. 
     Embodiment 9 
     In the electronic component handler according to the embodiment, a reporting unit is provided, wherein the control unit may transmit a signal to the reporting unit when determining that the electronic component is not housed in the recess or when determining that a position of the electronic component housed in the recess is skewed, and the reporting unit may receive the signal and report. 
     According to the embodiment, the user may properly perceive when the determination that the electronic component is not housed in the recess or the position of the electronic component housed in the recess is skewed is made. 
     Embodiment 10 
     In the electronic component handler according to the embodiment, the control unit may stop the transport when determining that the electronic component is not housed in the recess or when determining that a position of the electronic component housed in the recess is skewed. 
     According to the embodiment, malfunction may be suppressed when the determination that the electronic component is not housed in the recess or the position of the electronic component housed in the recess is skewed is made. 
     Embodiment 11 
     An electronic component handler according to the embodiment is an electronic component handler that transports an electronic component to a test unit, including a holding member including a recess having a colored bottom portion and housing the electronic component in the recess, an imaging unit that images the recess, and a control unit that compares a reference ratio of the bottom portion previously calculated from a plan view area of the electronic component and a plan view area of the bottom portion with a detection ratio of the bottom portion detected from an image captured by the imaging unit, and determines presence or absence of the electronic component housed in the recess or whether or not a position of the electronic component housed in the recess is good. 
     According to the embodiment, the bottom portion of the recess is colored, and thereby, in the captured image, the difference between the bottom portion and another part such as the electronic component housed in the recess is clearer and slight exposure may be sensed. The presence or absence of the electronic component housed in the recess or whether or not the position of the electronic component housed in the recess is good may be determined by comparison between the reference ratio of the bottom portion and the detection ratio of the bottom portion. Therefore, compared to the method of image matching of comparing test image data with reference image data, shape recognition or comparison between the recognized shape image and the reference image is unnecessary, and thus, the determination in the shorter time may be performed. 
     Embodiment 12 
     An electronic component tester according to the embodiment includes one of the electronic component handlers according to Embodiment 1 to Embodiment 11 and a test unit that tests the electronic component transported by the electronic component handler. 
     According to the embodiment, in the electronic component tester, the bottom portion of the recess is colored, and thereby, slight exposure may be sensed, and the presence or absence of the electronic component housed in the recess or whether or not the position of the electronic component housed in the recess is good may be determined. Therefore, compared to the method of image matching of comparing test image data with reference image data, shape recognition or comparison between the recognized shape image and the reference image is unnecessary, and thus, the determination in the shorter time may be performed.