Abstract:
A handler is configured by, separably and connectably, a plurality of types of handling modules of different throughputs and a plurality of types of test modules of different numbers of simultaneous measurements and/or test temperatures. Based on the maximum number of measurable pins of the tester outputting a test pattern and examining a response pattern, the number of terminals of the DUTs, and the test time, the throughput of the handling module and the number of simultaneous measurements and/or test temperature of the test module are selected and combined.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     The present invention relates to an electronic device test apparatus for testing semiconductor integrated circuit devices and various other electronic devices and a method of configuring an electronic device test apparatus, more particularly relates to an electronic device test apparatus enabling optimization so that the efficiency of the test apparatus as a whole does not fall due to the performance of a handler even when maximum number of simultaneous measurements has been changed due to the relationship between the maximum number of testable pins of the tester and the number of pins of an electronic device under test (DUT) and a method of configuring such an electronic device test apparatus.  
         [0003]     2. Description of the Related Art  
         [0004]     In the process of production of semiconductor devices, an electronic device test apparatus becomes necessary for testing the finally produced IC chip or other electronic device. This type of electronic device is tested by setting the test environment to an ordinary temperature, high temperature, or low temperature environment, inputting a test pattern to the IC chip and operating it in that temperature state, and examining the response pattern. This is because the characteristics of an IC chip have to be guaranteed to enable good operation both under ordinary temperature or a high temperature or low temperature.  
         [0005]     A general electronic device test apparatus of the related art is comprised of a test head provided with a tester in which a program for transmitting a test pattern and examining the response pattern is stored and contact terminals for electrically connecting this tester and a DUT and a handler for successively conveying a large number of DUTs to the contact terminals of the test head and physically classifying the DUTs finished being tested in accordance with the test results. Further, it sets DUTs at the handler for conveyance to the test head where it presses the DUTs against the contact terminals of the test head for electrical contact for the purpose of the desired operating test.  
         [0006]     One of the aspects of the performance of a tester is the maximum number of testable pins. This means the number of signal terminals enabling output from and input to that tester. The maximum number of devices able to be simultaneously tested is determined from the relationship of this maximum number of testable pins and the number of pins (number of terminals) of the DUT. For example, when the maximum number of testable pins of the tester is 100 and the number of terminals of the DUT is 20, the maximum number of simultaneous measurements is 100÷20=5.  
         [0007]     On the other hand, one of the aspects of the performance of a handler is its throughput. This is the number of the DUTs which that handler can handle per unit time. That is, this shows the mechanical operation speed by which the handler sets the pre-tested DUTs, aligns them before the test head, conveys them to the test head, pushes them against the contact terminals, then arranges them classified in accordance with the test results. The larger the throughput, the higher the productivity of the handler. However, even with a handler with a large throughput, if the time for pressing the DUTs against the contact terminals for transfer of operating signals (hereinafter also referred to as the “test time”) is long, so-called “waiting time” will occur in the conveyance system, so the maximum throughput will not necessarily be realized. That is, depending on the test time, the maximum throughput will sometimes be realized and other times will not. On the other hand, there is the difficulty that the higher the speed of the conveyance system, the greater the cost of the equipment.  
         [0008]     As explained above, in an electronic device test apparatus, if the numbers of terminals of the DUTs (numbers of pins) differ, the maximum number of simultaneous measurements will also change. Therefore, to obtain the desired productivity, testers with different maximum numbers of measurable pins would become necessary. If using common equipment for the testers, handlers of specifications with different throughputs become necessary. However, if not selecting the handler with the optimum throughput from the relationship with the test time, the result will not be efficient. Further, due to the target test temperature (low temperature, ordinary temperature, or high temperature) or testable temperature range, adiabatic structures or thermostats (chambers) with different components or temperature regulators become necessary.  
         [0009]     Further, electronic device test apparatuses come in shapes or IC pin configurations differing depending on the types of the DUTs. Switching change kits enables conveyance by common test trays.  
         [0010]     Further, at the tester side with the test heads, there are testers of a plurality of types of system configurations designed for diverse DUTs. Therefore, the maximum number of testable pins (number of channels of tester) provided at the test head differs tremendously such as for example 256, 512, 1024, and other channels.  
       SUMMARY OF THE INVENTION  
       [0011]     An object of the present invention is to provide an electronic device test apparatus enabling configuration and change of the optimum system configuration so that the efficiency of the test apparatus as a whole does not fall due to the performance of a handler even when maximum number of simultaneous measurements has been changed due to the relationship between the maximum number of testable pins of the tester and the number of pins of an electronic device under test (DUT) and a method of configuring such an electronic device test apparatus.  
         [0012]     To achieve the above object, according to a first aspect of the present invention, there is provided an electronic device test apparatus bringing DUTs into electrical contact with contacts of a test head, where at least one of the units forming the electronic device test apparatus is modularized to enable exchange, add or reconfigure (reorganize) (claim  1 ).  
         [0013]     Preferably, the units forming the electronic device test apparatus include at least one of a stocker unit for storing DUTs before and after testing, a loader unit for unloading the DUTs, a soak unit for making the DUTs a target temperature, a contact unit for bringing the DUTs into electrical contact with contacts, an eject unit for temporarily holding DUTs finished being tested at the contact unit, and an unloader unit for classifying DUTs finished being tested at the contact unit in accordance with test results, and at least one unit among the units is modularized to enable exchange, add or reconfigure (claim  2 ).  
         [0014]     In the above invention, at least one unit among the units is modularized to enable exchange, add or reconfigure, or a combined unit of two or more units among the units are modularized to enable exchange, add or reconfigure.  
         [0015]     Preferably, the units forming the electronic device test apparatus include a handling unit and a test unit, the handling unit stores DUTs before and after testing, takes out stored DUTs to unload them to the test unit, and classifies the DUTs finished being tested at the test unit in accordance with the test results, the test unit makes the DUTs loaded from the handling unit the target temperature and brings the DUTs into electrical contact with the contacts of the test head from which a test pattern is output and a response pattern is input, and at least one of the handling unit or the test unit is modularized to enable exchange, add or reconfigure (claim  3 ).  
         [0016]     Preferably, the handling unit has a stocker unit for storing DUTs before and after testing, a loader unit for unloading DUTs stored in the stocker unit to the test unit, and an unloader unit for classifying DUTs finished being tested at the test unit in accordance with test results (claim  4 ).  
         [0017]     Preferably, at lease one unit among the stocker unit, the loader unit, or the unloader unit have controllers for controlling the units individually (separately) or in common, and the apparatus further has a central managing means for centrally managing the controllers (claim  5 ).  
         [0018]     Preferably, the test unit has a soak unit for making the DUTs loaded from the handling unit a target temperature, a contact unit for bringing the DUTs into electrical contact with contacts in the state maintained at the temperature, and an eject unit for temporarily holding DUTs finished being tested at the contact unit (claim  6 ).  
         [0019]     Preferably, at least one unit among the soak unit, the contact unit, or the eject unit have controllers for controlling the units individually (separately) or in common, and the apparatus further has a central managing means for centrally managing the controllers (claim  7 ).  
         [0020]     Preferably, a component of any unit of the stocker unit, the loader unit, the soak unit, the contact unit, the eject unit, and the unloader unit is modularized to enable exchange, add or reconfigure (claim  8 ).  
         [0021]     According to a second aspect of the invention, there is provided an electronic device test apparatus having at least one of a stocker unit for storing DUTs before and after testing, a loader unit for unloading DUTs, a soak unit for making the DUTs a target temperature, a contact unit for bringing the DUTs into electrical contact with contacts in a state maintained at the temperature, an eject unit for temporarily holding DUTs finished being tested at the contact unit, and an unloader unit for classifying DUTs finished being tested at the contact unit in accordance with test results, and at least one unit among the units is modularized to enable exchange, add or reconfigure (claim  9 ).  
         [0022]     Preferably, at least one of the loader unit and the unloader unit has as a component a holder of a moving means for holding and moving DUTs, and the holder is modularized to enable exchange, add or reconfigure at one of the loader unit and the unloader unit (claim  10 ).  
         [0023]     Preferably, the holder has a controller for controlling the holder, and the central managing means manages the controller (claim  11 ).  
         [0024]     Preferably, the contact unit has as a component a pushing means for simultaneously pushing a plurality of the DUTs against contacts, and the pushing means is modularized to enable exchange, add or reconfigure at the contact unit (claim  12 ).  
         [0025]     Preferably, the pushing means has a controller for controlling the pushing means, and the central managing means manages the controller (claim  13 ).  
         [0026]     Preferably, at least one of the loader unit, the soak unit, the contact unit, the eject unit, and the unloader unit has an inter-unit conveying means for transferring a test tray carrying DUTs or the DUTs themselves to adjoining units (claim  14 ).  
         [0027]     Preferably, the component of the inter-unit conveying means is modularized to enable exchange, add or reconfigure in the inter-unit conveying means (claim  15 ).  
         [0028]     Preferably, the component of the inter-unit conveying means is a shuttle supported by a movement mechanism moving reciprocatively between adjoining units and supporting the DUTs (claim  16 ).  
         [0029]     Preferably, the shuttle has a controller for controlling the shuttle, and the central managing means manages the controller. (claim  17 ).  
         [0030]     According to a third aspect of the invention, there is provided a method of configuring an electronic device test apparatus comprising modularizing to enable exchange, add or reconfigure at least one of the units forming the apparatus for bringing the DUTs into electrical contact with the contacts of the test head and selecting the modularized unit from among a plurality of types of unit of different specifications to configure the electronic device test apparatus (claim  18 ).  
         [0031]     Preferably, the method further comprises making the units forming the electronic device test apparatus include at least one unit among a stocker unit for storing DUTs before and after testing, a loader unit for unloading the DUTs, a soak unit for making the DUTs a target temperature, a contact unit for bringing the DUTs into electrical contact with contacts, an eject unit for temporarily holding DUTs finished being tested at the contact unit, and an unloader unit for classifying DUTs finished being tested at the contact unit in accordance with the test results, modularizing at least one unit among the units to enable exchange, add or reconfigure, and selecting the modularized unit from among a plurality of types of units of different specifications to configure the electronic device test apparatus (claim  19 ).  
         [0032]     Preferably, the method further comprises making the units forming the electronic device test apparatus include a plurality of types of handling units of different throughputs for storing DUTs before and after testing, taking out the stored DUTs and unloading them to the test unit, and classifying the DUTs finished being tested at the test unit in accordance with the test results and a plurality of types of test units different in at least one of the number of simultaneous measurements and test temperature for making the DUTs loaded from the handling unit a target temperature and bringing the DUTs into electrical contact with contacts of a test head from which a test pattern is output and from which a response pattern is input, modularizing at least one of the handling unit or the test unit to enable exchange, add or reconfigure, and selecting at least one of a throughput of the corresponding type of the handling unit or the number of simultaneous measurements and/or test temperature of the corresponding type of the test unit to configure the electronic device test apparatus based on the maximum number of measurable pins of a tester outputting a test pattern and examining a response pattern, the number of terminals of the DUTs, and the test time.  
         [0033]     Preferably, the method further comprises making the plurality of handling units differ in at least one of the number of simultaneous holdings and the conveyance speed when loading the DUTs so as to make the throughput different.  
         [0034]     Preferably, the method further comprises making the handling unit include a stocker unit for storing DUTs before and after testing, a loader unit for taking out DUTs stored in the stocker unit and unloading them to the test unit, and an unloader unit for classifying DUTs finished being tested at the test unit in accordance with test results.  
         [0035]     Preferably, the method further comprises making the test unit include a soak unit for making the DUTs loaded from the handling unit a target temperature, a contact unit for bringing the DUTs into electrical contact with contacts in the state maintained at the temperature, and an eject unit for temporarily holding DUTs finished being tested at the contact unit.  
         [0036]     Preferably, the method further comprises making the plurality of test units differ in number of DUTs simultaneously brought into contact with the contacts at the contact unit.  
         [0037]     Preferably, the method further comprises making the plurality of test units differ in performance in making the DUTs the target temperature at the soak unit and eject unit.  
         [0038]     Preferably, the method further comprises modularizing a component of any unit of the stocker unit, the loader unit, the soak unit, the contact unit, the eject unit, and the unloader unit to enable exchange, add or reconfigure and selecting the component to be mounted at the unit from among a plurality of types of components of different specifications.  
         [0039]     Preferably, the method further comprises making at least one of the loader unit and the unloader unit include as a component a moving means for moving the DUTs, modularizing a holder for holding the DUTs to enable exchange, add or reconfigure at the moving means, and selecting the holder to be mounted at the moving means from the plurality of types of holders of different specifications (claim  20 ).  
         [0040]     Preferably, the method further comprises making the contact unit include as a component a pushing means for simultaneously pushing a plurality of the DUTs against contacts, modularizing the pushing means to enable exchange, add or reconfigure at the contact unit, and selecting the pushing means mounted at the contact unit from among of a plurality of types of the pushing means of different specifications (claim  21 ).  
         [0041]     Preferably, the method further comprises making at least one of the loader unit, the soak unit, the contact unit, the eject unit, and the unloader unit an inter-unit conveying means for transferring a test tray carrying DUTs or the DUTs themselves to adjoining units, modularizing a component of the inter-unit conveying means to enable exchange, add or reconfigure at the inter-unit conveying means, and selecting the component mounted at the inter-unit conveying means from a plurality of types of components of different specifications (claim  22 ).  
         [0042]     Preferably, the method further comprises making the component of the inter-unit conveying means a shuttle supported by a movement mechanism moving reciprocatively between adjoining units and holding DUTs (claim  23 ).  
         [0043]     Preferably, the method further comprises forming at constant positions of the handling units and the test units a mechanical interface, electrical interface, software interface, and power connector (claim  24 ).  
         [0044]     In the electronic device test apparatus and method of configuring an electronic device test apparatus of the present invention, the electronic device test apparatus is modularized in units. Due to this, the electronic device test apparatus can be tailored to required specifications in units, so even when the maximum number of simultaneous measurements is changed due to the relationship between the maximum number of testable pins of the tester and the number of pins of the DUTs, it is possible to configure/change to the optimum system configuration without allowing the efficiency of the test apparatus as a whole to decline due to handler performance.  
         [0045]     For example, when modularizing the electronic device test apparatus to a handling module and test module, for the handling module, a plurality of handling modules DUT given different throughputs by being given different numbers of simultaneous holdings at the time of conveyance and/or conveyance speed are prepared. Further, for the test module, for example, a plurality of test modules given different numbers of simultaneous measurements or test temperatures (function of adjustment of temperature of DUTs) are prepared.  
         [0046]     Further, the handling module having optimum throughput and the test module having the optimum number of simultaneous measurements and/or test temperature are selected based on the maximum number of measurable pins of the tester, the number of terminals of the DUTs, and the test time so as to configure the electronic device test apparatus.  
         [0047]     Due to this, even when the maximum number of simultaneous measurements changes due to the relationship between the maximum number of testable pins of the tester and the number of pins of the DUTs, it is possible to optimize the system configuration without allowing the efficiency of the test apparatus as a whole to decline due to handler performance. As a result, even if the test specifications or test conditions are changed, it is sufficient to change only the minimum necessary extent of the modules, so the design and development time and production costs can be reduced.  
         [0048]     According to a third aspect of the present invention, there is provided an electronic device test apparatus comprising a plurality of types of units of different specifications at least one of which is modularized to enable exchange, add or reconfigure, the plurality of types of units being given ID information for identifying their types, selecting a predetermined unit from the plurality of types of units to configure a system, and reading the ID information from the unit and controlling operation in accordance with that unit based on that read ID information (claim  25 ).  
         [0049]     Preferably, the units configuring the apparatus include a stocker unit for storing DUTs before and after testing, a loader unit for unloading DUTs, a soak unit for making the DUTs a target temperature, a contact unit for bringing the DUTs into electrical contact with contacts, an eject unit for temporarily holding DUTs finished being tested at the contact unit, and an unloader unit for classifying DUTs finished being tested at the contact unit in accordance with test results, at least one unit among the units being modularized to enable exchange, add or reconfigure (claim  26 ).  
         [0050]     Preferably, the units forming the electronic device test apparatus include a handling unit and a test unit, the handling unit stores DUTs before and after testing, takes out stored DUTs to unload them to the test unit, and classifies the DUTs finished being tested at the test unit in accordance with the test results, the test unit makes the DUTs loaded from the handling unit the target temperature and brings the DUTs into electrical contact with the contacts of the test head from which a test pattern is output and a response pattern is input, and at least one of the handling unit or the test unit is modularized to enable exchange, add or reconfigure (claim  27 ). Preferably, provide with unit inherent information which is inherent (specific) in each module and corresponds to the ID information (claim  28 ).  
         [0051]     Preferably, the apparatus is provided with control software for controlling the operation of each unit in accordance with the configured system configuration (claim  29 ).  
         [0052]     Preferably, a connection portion for connecting a first unit and second unit configuring the system is mechanically connected to enable DUTs to be loaded and is electrically connected to enable DUTs to be tested (claim  30 ).  
         [0053]     Preferably, the apparatus operates while freely exchanging a first unit of specifications different from the initially set system configuration and a second unit of specifications different from the configuration (claim  31 ). 
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0054]     These and other objects and features of the present invention will become clearer from the following description of the preferred embodiments given with reference to the attached drawings, wherein:  
         [0055]      FIG. 1  is a schematic view of a first embodiment of a test module according to the present invention;  
         [0056]      FIG. 2  is a schematic view (front view) of the first embodiment of a handling module according to the present invention;  
         [0057]      FIG. 3  is a schematic view (back view) of the first embodiment of a handling module according to the present invention;  
         [0058]      FIG. 4  is a view for explaining the combination of types of handling modules and test modules according to the present invention;  
         [0059]      FIG. 5  is a conceptual view of the method of transporting DUTs and trays in an electronic device test apparatus according to the present invention;  
         [0060]      FIG. 6  is a view for explaining the method of selection based on the number of simultaneous measurements of the test module according to the present invention;  
         [0061]      FIG. 7  is a view for explaining the method of selection based on the throughput of the handling module and the number of simultaneous measurements of the test module according to the present invention;  
         [0062]      FIG. 8  is a disassembled perspective view of a second embodiment of a handler according to the present invention;  
         [0063]      FIG. 9  is a perspective view of a second embodiment of a handler according to the present invention;  
         [0064]      FIG. 10  is an enlarged sectional view of a pusher module in a second embodiment of the present invention;  
         [0065]      FIG. 11A  is a plan view of a variation of the pusher module having 256 pushers;  
         [0066]      FIG. 11B  is a plan view of a variation of a pusher module having 128 pushers;  
         [0067]      FIG. 12  is a side view of a contact arm module;  
         [0068]      FIG. 13A  is a side view of a variation of the contact arm module having four contact arms;  
         [0069]      FIG. 13B  is a side view of a variation of the contact arm module having six contact arms;  
         [0070]      FIG. 13C  is a side view of a variation of the contact arm module having six contact arms;  
         [0071]      FIG. 14  is a side view of a holding head module of an XYZ conveyor apparatus in a second embodiment of the present invention;  
         [0072]      FIG. 15A  is a side view of a variation of a holding head module showing a first type;  
         [0073]      FIG. 15B  is a side view of a variation of a holding head module showing a second type;  
         [0074]      FIG. 15C  is a side view of a variation of a holding head module showing a third type;  
         [0075]      FIG. 15D  is a side view of a variation of a holding head module showing a fourth type;  
         [0076]      FIG. 16  is a disassembled perspective view of the case when mounting a loader/unloader module at the handler shown in  FIG. 8 ;  
         [0077]      FIG. 17  is a perspective view of the handler shown in  FIG. 16  assembled;  
         [0078]      FIG. 18  is a disassembled perspective view of a contact module and eject module in a second embodiment of the present invention;  
         [0079]      FIG. 19  is a front view of the contact module and eject module shown in  FIG. 18 ;  
         [0080]      FIG. 20  is a schematic perspective view showing the inside of a contact module and eject module in a third embodiment of the present invention;  
         [0081]      FIG. 21  is a plan view showing the inside of the contact module and eject module shown in  FIG. 20 ;  
         [0082]      FIG. 22  is a disassembled perspective view showing electrical wiring etc. according to a handler in the second embodiment of the present invention; and  
         [0083]      FIG. 23  is a block diagram showing the overall configuration of a control system of a handler according to the second embodiment of the present invention. 
     
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0084]     Below, embodiments of the present invention will be explained based on the drawings.  
       First Embodiment  
       [0085]      FIG. 1  is a schematic view of a first embodiment of a test module according to the present invention,  FIG. 2  is a schematic view (front view) of the first embodiment of a handling module according to the present invention,  FIG. 3  is a schematic view of the same (back view),  FIG. 4  is a view for explaining the combination of the types of the handling modules and test modules according to the present invention,  FIG. 5  is a conceptual view of the method of transporting DUTs and trays in the electronic device test apparatus according to the present invention,  FIG. 6  is a view for explaining a selection method based on the number of simultaneous measurements of the test module according to the present invention, and  FIG. 7  is a view for explaining a selection method based on the throughput of the handling module and the number of simultaneous measurements of the test module according to the present invention. Note that  FIG. 5  is a view for explaining the method of transporting DUTs and trays in the electronic device test apparatus in the present embodiment and shows planarly the members actually arranged in the vertical direction. Therefore, that mechanical (three-dimensional) structure will be explained with reference to  FIG. 1  to  FIG. 3 .  
         [0086]     The electronic device test apparatus according to the present embodiment tests DUTs to determine whether the DUTs suitably operate in a state given a desired high temperature or low temperature stress or not given temperature stress at ordinary temperature and classifies the DUTs in accordance with the test results to good devices, defects, and different categories. It is comprised of a handler for successively transferring DUTs to contact terminals provided at the test head, classifying the DUTs finished being tested in accordance with the test results, and storing them at predetermined trays, a tester (not shown) for transmitting a predetermined test pattern and testing and evaluating the DUTs based on the response signals, and a test head  8  having contact terminals and functioning as an interface between the handler and tester ( FIG. 5 ). The tester and test head  8  and the handler and tester are electrically connected through cables and other signal lines etc. Note that the contact terminals include contact terminals for contacting the drive terminals of the DUTs and contact terminals for contacting the input/output terminals of the DUTs. These are referred to overall as “contact terminals”. Further, the contact terminals input and output various signals from the tester through sockets and circuit boards provided at the test head.  
         [0087]     The test apparatus according to the present invention is mainly comprised of the handler part. In the present embodiment, this handler is comprised of the test module  1  shown in  FIG. 1  and the handling module  2  shown in  FIG. 2  and  FIG. 3 .  
         [0088]     The test module  1  sets the DUTs loaded from the handling module  2  to the target temperature and brings the DUTs into electrical contact with the contact unit of the test head from which the test pattern is output and to which the response pattern is input.  
         [0089]     As shown in  FIG. 1  and  FIG. 5 , the test module  1  of this example is comprised of a soak unit  11  for raising or lowering the DUTs loaded from the handling module  2  to the target temperature, a contact unit  12  for bringing the DUTs into electrical contact with the contact unit in the state maintained in temperature, and an eject unit  13  for temporarily holding the DUTs finished being tested at the contact unit  12 . The units are formed to be able to be attached and detached to and from each other. That is, the frames forming the units  12 ,  13 , and  14  forming the test module  1  are standardized. The units can be attached and detached to and from each other through the frames.  
         [0090]     Further, the DUTs are transported inside the test module  1  by a test tray  91  as shown in for example  FIG. 5 . The test tray  91  is designed to be circulated inside the test module  1  and handling module  2  by a not shown conveyor as shown by the arrows. Further, the later mentioned loader unit  21  moves DUTs carried on a customer tray (C-tray)  10  to a test tray  91  and transports this test tray  91  from the soak unit  11 →contact unit  12 →eject unit  13 →unloader unit  22  for testing the DUTs.  
         [0091]     The test module  1  of this example, as shown in  FIG. 4 , comes in four types including a type enabling 256 number of simultaneous measurements in the contact unit  12  and a type enabling 128 and including a type enabling a test temperature of −40° C. to 135° C. in range and a type enabling a test temperature of room temperature to 135° C. in range. That is, as shown in the drawings, there are a type  1 A enabling 256 simultaneous measurements and a test temperature of −40° C. to 135° C., a type  1 B enabling 256 simultaneous measurements and a test temperature of room temperature to 135° C., a type  1 C enabling 128 simultaneous measurements and a test temperature of −40° C. to 135° C., and a type  1 D enabling 128 simultaneous measurements and a test temperature of room temperature to 135° C.  
         [0092]     The difference between the types enabling 256 and 128 simultaneous measurements is whether 256 or 128 pushers are provided for pushing the DUTs to the contact unit in the contact unit  12 . The frames forming the contact units  12  are all formed the same (standard shapes). The layout shown at the top of  FIG. 6  is an array of 256 pushers for simultaneous measurement, while the layout shown at the bottom of the figure is an array of 128 pushers for simultaneous measurement. Of course, there are also two types of specifications of the contact unit of the test head: one for 256 sockets and one for 128 sockets.  
         [0093]     The difference between the type enabling a range of test temperature of −40° C. to 135° C. and the type enabling one of room temperature to 135° C. is whether the DUTs can be cooled to an extremely low temperature of −40° C. or so. In the former type, the soak unit  11  is provided with a cooling device enabling the DUTs to be cooled to −40° C., while the eject unit  13  is provided with an anti-condensation device for preventing condensation at the DUTs cooled to such a low temperature. Further, in addition to this cooling device and anti-condensation device, a heating device for heating the DUTs to room temperature to 135° C. is provided. As opposed to this, in the latter type test module  1 , only the heating device is provided for heating the DUTs to room temperature to 135° C. The cooling device for cooling to an extremely low temperature forms the soak unit by a chamber and passes nitrogen gas or another cooling gas through this chamber. Further, as the anti-condensation device, a device for heating the DUTs maintained at a low temperature to near room temperature can be illustrated.  
         [0094]     However, the frames forming the soak unit  11  and eject unit  13  are all the same shapes (standard shapes). Each type of unit can be attached to and detached from the adjoining units.  
         [0095]     As shown in  FIG. 1 , the front side of the soak unit  11  (surface to which later explained handling module  2  is attached) is formed with an inlet opening  111  into which a test tray carrying a large number of DUTs is loaded. Further, the front side of the eject unit  13  is formed with an outlet opening  131  for unloading a test tray finishing being tested at the contact unit  12  and arriving at the eject unit  13  to the handling module  2 . Further, these inlet openings  111  and outlet openings  131  are standardized in position and shape (size). All types of soak units  11  and eject units  13  have openings at the same position and of the same shape. Further, corresponding to the inlet opening  111 , the loader unit  21  of the handling module  2 , as shown in  FIG. 3 , is formed with an outlet opening  219  of the same position and shape. Similarly, the unloader unit  22  of the handling module  2 , as shown in the same figure, is formed with an inlet opening  229  of the same position and shape. Further, when assembling the test module  1  and handling module  2 , the inlet opening  111  of the soak unit  11  and the outlet opening  219  of the loader unit  21  are joined and the outlet opening  131  of the eject unit  13  and the inlet opening  229  of the unloader unit  22  are joined. Due to this, the test tray can be transferred between the units.  
         [0096]     Note that as shown in  FIG. 3 , when assembling the test module  1  and handling module  2 , it is desirable to provide a member  23  for mechanical positioning of the two at least at one of the modules  1  and  2 .  
         [0097]     Returning to  FIG. 1 , the bottom of the frame of the test module  1  is provided with a breaker unit  14  for the power source used at the test module  1 , terminal power unit, and control unit  15 . Further, at fixed positions at the front side of the test module  1  (surface attached to the handling module  2 ), a mechanical interface  16  for air pipes forming the circuit of the various fluid pressure cylinders etc., power connector  17 , software interface  18  for transmitting and receiving ID data or temperature control data for identifying the modules or units, an electrical interface  19  for the electric motor, sensor, etc. are provided. Further, it is also possible to provide the components at each of the modules.  
         [0098]     Here, for the software for controlling the operation of the modules, the ID data identifying the modules is read and software corresponding to the ID data is applied.  
         [0099]     Further, it is desirable to prepare in advance software corresponding to possible combinations of modules. In this case, it becomes possible to immediately change and utilize the system configuration of the electronic device test apparatus to correspond to the DUTs. Also, it is provided with the inherent information with respect to each module, for example a motion correcting data or a maintenance count data etc., and the inherent information corresponds to the ID data. Here, it is explained the motion correcting data. There is an error of mechanical position or a difference of moving length etc. with respect to each module. And so the mechanical position or the moving length are measured in advance and saved as the motion correcting data with respect to each module corresponding to the ID data. When the module is exchanged, the error of mechanical position or the difference of moving length is corrected based on the motion correcting data corresponding to the ID data. Whereby, there is an advantage of being unitarily able to control each module by using same logical controlling data without recognizing mechanical error of the exchanged module. Therefore there is an advantage that the different modules are able to be replaced at the point of production at any time. Next, it is explained the maintenance count data. The maintenance count data is save as the number of motion times of each motion element (an suction pad, an air cylinder etc.) or the number of contact times of contact terminals corresponding to the ID data. Whereby, mechanical stress information of each motion element or each consumable part of each module are obtained so that the timing of maintenance or timing of exchanging the consumable part is managed with precision.  
         [0100]     These mechanical interface  16 , power connector  17 , software interface  18 , and electrical interface  19  are positioned and shaped to enable connection to the mechanical interface  26 , power connector  27 , software interface  28 , and electrical interface  29  shown in  FIG. 3  when assembling the test module  1  and handling module  2 .  
         [0101]      FIG. 2  and  FIG. 3  show the handling module  2  according to the present embodiment.  FIG. 2  is a front view in the case of assembly as a handler, while  FIG. 3  is a back view mainly showing the surface for attachment with the above-mentioned test module  1 . The handling module  2  stores the DUTs before and after testing, takes out the stored DUTs and unloads them to the test module  1 , and classifies the DUTs finished being tested at the test module  1  according to the test results.  
         [0102]     As shown in  FIGS. 2, 3 , and  5 , the handling module  2  of this example is comprised of a stocker unit  24  for storing DUTs before and after testing, a loader unit  21  for taking out DUTs stored in the stocker unit  24  and unloading them to the test module  1 , and an unloader unit  22  for classifying the DUTs finished being tested at the test module  1  according to the test results. The units  21 ,  22 , and  24  are formed to be attachable/detachable. That is, the frames forming the units  21 ,  22 , and  24  forming the handling module  2  are standardized. The units can be attached and detached through these frames.  
         [0103]     The handling module  2  of this example, as shown in  FIG. 7 , comes in two types: a type  2 A having a maximum throughput of 11000 devices/hour and a type  2 B having a maximum throughput of 6000 devices/hour. These two types differ in the operating speed of the DUT XYZ conveyor apparatuses  211 ,  221  (so-called “pick and place” conveyor apparatuses,  FIG. 5 ) provided at the loader unit  21  and unloader unit  22  and the number of simultaneously holdable DUTs. The type having a maximum throughput of a large  11000  devices/hour has faster operating speeds of the XYZ conveyor apparatuses  211 ,  221  and greater number of DUTs able to be held at the same time. Along with the differences in the specifications, the equipment differ tremendously in cost.  
         [0104]     The stocker unit  24 , as shown in  FIG. 5 , has a stocker  24 A for stacking and storing customer trays  92  carrying pluralities of pre-test DUTs and a stocker  24 B for stacking and storing customer trays  92  carrying pluralities of DUTs finished being tested classified in accordance with the test results. Further, a tray conveyor apparatus  24 C is used to successively unload customer trays  92  from the stocker  24   a  in which the pre-test DUTs are stored to the loader unit  21 . The DUTs carried on each customer tray  92  are moved to a test tray  91  using the XYZ conveyor apparatus  211  of the above-mentioned loader unit  21 . For this reason, the stocker unit  24  and loader unit  21  are provided between them with an opening for transfer of customer trays  92 . Similarly, the XYZ conveyor apparatus  221  is used to move DUTs from the test tray  91  on which the tested DUTs are carried to the customer trays  92  according to the test results. The customer trays  92  are conveyed to the stocker  24 B of the stocker unit  24  using a tray conveyor apparatus  24 C. For this reason, the stocker unit  24  and unloader unit  22  are provided between them with an opening for transfer of the customer trays  92 .  
         [0105]     The stocker unit  24  sometimes has to be changed to a different stocker unit depending on the type or shape of the customer trays. In this case, it may be changed to the corresponding stocker unit  24  in the present invention. Therefore, the electronic device test apparatus is made more general in applicability.  
         [0106]     Returning to  FIG. 2 , the bottom part of the frame of the handling module  2  is provided with a main power source  25  used for the handling module  2  and a control unit  30 .  
         [0107]     In the electronic device test apparatus according to the present embodiment configured in this way, the desired types of modules are selected and combined from the two types of handling modules  2  shown in  FIG. 4  and four types of test modules  1 . The handling modules  2  come in two types: type  2 A having a maximum throughput of 11000 devices/hour and type  2 B having a maximum throughput of 6000 devices/hour, so the specifications required for the line are selected. However, note that due to the test time of the DUTs, sometimes the maximum throughput can be realized and sometimes it cannot.  
         [0108]     Explaining this point,  FIG. 7  is a graph plotting the throughput on the ordinate and the test time on the abscissa for the handler of this example. The “X” in the figure shows the throughput when using a handling module  2 A having a maximum throughput of 11000 devices/hour. That is, when the test time of the DUTs is A′ hours or less, a capacity of 11000 devices/hour is realized. If the test time exceeds A′, the throughput falls. As opposed to this, the “Y” of the figure shows throughput when using a handling module  2 B having a maximum throughput of 6000 devices/hour. When the test time is B or less, the maximum throughput of 6000 devices/hour is realized, but when the test time exceeds B, the throughput falls. Here, when the test time on a semiconductor production line exceeds B, the throughput is the same whether using a handling module of the type  2 A or using one of the type  2 B, so from the viewpoint of the cost performance, it can be said to be suitable to employ the handling module  2 B. Similarly, when the test time is A′ or less, the handling module  2 A realizes its maximum throughput, so from the viewpoint of productivity, it can be said to be suitable to employ the handling module  2 A. Further, when the test time is a time A between A′ to B, as shown by “Z” in the figure, there is a difference in throughput. If this difference in throughput more than makes up for the difference in cost, it is suitable to employ the handling module  2 A, but when it does not, employing the handling module  2 B is suitable cost-wise. The handling modules  2 A and  2 B are selected from these viewpoints. In this way, in this application, it is possible to combine modules with difference performances. Due to this, there is the great advantage that even if the test head connected to is changed or the type of DUTs to be tested change from the initially set system configuration, the optimum system configuration for the DUTs can be changed to. Therefore, there is the great advantage that it is possible to flexibly and effectively utilize the electronic device test apparatus. Further, instead of developing and producing individual electronic device test apparatuses for new devices like in the past, it is sufficient to develop, produce, and utilize just the corresponding modules, so it is possible to realize an electronic device test apparatus aimed at shortening the time. Further, the system cost can also be reduced. Further, at temporary shutdowns for repair or maintenance of malfunctioning modules, it is also possible to temporarily change to replacement modules with the same or different performances so as to test the DUTs, so the temporary shutdowns of the system can be greatly shortened and as a result the operating time can be substantially improved.  
         [0109]     As opposed to this, the test module  1  comes in the four types  1 A to  1 D shown in the figure, so the specifications required for the line are selected considering the number of simultaneous measurements and the test temperature. For example, when requiring a very low temperature test of a test temperature of −40° C., the type  1 A or  1 C is selected.  
         [0110]      FIG. 4  shows examples of combinations at the right end. The top row of the right end of the figure shows an electronic device test apparatus configured using a handling module  2 A having a maximum throughput of 11000 devices/hour and a test module  1 A having a number of simultaneous measurements of 256 devices and a test temperature of −40° C. to 135° C., while the bottom row of the same shows an electronic device test apparatus configured using a handling module  2 B having a maximum throughput of 6000 devices/hour and a test module  1 D having a number of simultaneous measurements of 128 devices and a test temperature of room temperature to 135° C. The former test apparatus can handle a broad test range and is good in test efficiency, but has the defect that the cost rises by that amount, while the latter test apparatus features the opposite. Therefore, it is important to balance the performance and cost in accordance with the test specifications which the semiconductor production line requires, but the electronic device test apparatus of the present embodiment can be later reconfigured in the test module  1  and handling module  2  even after once being configured. At that time, several of the units forming the modules  1  and  2  can be changed.  
         [0111]     In this way, in the electronic device test apparatus of the present embodiment, even if the maximum number of simultaneous measurements is changed due to the relationship between the maximum number of testable pins of the tester and the number of pins of the DUTs, it is possible to optimize the electronic device test apparatus without allowing the efficiency of the test apparatus as a whole to decline due to the performance of the handler. As a result, even if the test specifications or test conditions change, it is sufficient to change only the minimum necessary extent of modules, so the design and development time and the production costs can be reduced.  
         [0112]     In the first embodiment explained above, the test module  1  and the handling module  2  were configured as separate modules able to be connected to each other and configured with each other, but in the test module  1 , the soak unit  11 , contact unit  12 , and eject unit  13  and in the handling module  2 , the stocker unit  24 , loader unit  21 , and unloader unit  22  can further be modularized. Further, the suction heads of the XYZ conveyor apparatus, the pushers against the contacts, etc. in the units can further be modularized.  
         [0113]     In the following second embodiment, the case of modularizing the lower level units of the test module  1  and handling module  2  and combining them to form a handler will be explained.  
       Second Embodiment  
       [0114]      FIG. 8  is a disassembled perspective view of a second embodiment of a handler according to the present invention, while  FIG. 9  is a perspective view of the handler shown in  FIG. 8  assembled.  
         [0115]     The handler according to the present embodiment is comprised of a contact module  3 , eject module  4 , loader module  5 , unloader module  6 , and stocker module  7 . These modules  3  to  7  comprise the lower level units  11  to  13 ,  21 ,  22 , and  24  of the test module  1  and handling module  2  in the first embodiment formed into modules. There, this “modularization” means forming the units forming the electronic device test apparatus to be separable and connectable from and to their adjoining units and preparing two or more units of different specifications as replacement units.  
         [0116]      FIG. 10  is a side view of a pusher module in the second embodiment of the present invention,  FIG. 11A  and  FIG. 11B  are plan views showing variations of a pusher module,  FIG. 12  is a side view of a contact arm module, and  FIG. 13A  to  FIG. 13C  are plan views showing variations of a contact arm module.  
         [0117]     The contact module  3  is comprised of the soak unit  11  and contact unit  12  in the first embodiment formed into a single module. As variations of this contact module  3 , for example, in the same way as the first embodiment, two types with different ranges of test temperature may be mentioned.  
         [0118]     This contact module  3 , as shown in  FIG. 10 , is provided with a number of pushers  32  corresponding to the number of simultaneous measurements. The pushers  32  simultaneously push DUTs against the contacts  81  for testing. In the present embodiment, the number of simultaneous measurements worth of pushers  32  are attached to a base member  311  to form a submodule of a pusher module  31 . This pusher module  3  can be separated from and connected to the contact module  3 .  
         [0119]     As variations of this pusher module  31 , for example, the type  31 A provided with 256 pushers  32  as shown in  FIG. 11A  and the type  31 B provided with 128 pushers  32  as shown in  FIG. 11B  are provided.  
         [0120]     Note that in a logic IC test apparatus, instead of the pushers, as shown in  FIG. 12 , it is also possible to attach a plurality of contact arms  301  to the base member  302  to modularize them as a contact head module  300 . As variations of the contact arm module  300 , for example, as shown in  FIG. 13A  to  FIG. 13C , different types  300 A to  300 C having four, six, and eight contact arms may be mentioned. Note that it is also possible to change the shapes (sizes), arrays, mechanisms, etc. of the contact arms to change the specifications of the contact arm module.  
         [0121]     In the present embodiment, first, a contact module  3  of any of the two types is selected based on the required test temperature. Next, either the type  31 A or  31 B of pusher module is selected based on the required number of simultaneous measurements. Further, the selected pusher module is attached to the contact module  3 .  
         [0122]     By submodularizing the plurality of pusher  32  in the contact module  3  as a pusher module  31  in this way, it is possible to flexibly configure/change to the optimum system configuration without changing the contact module  3  as a whole.  
         [0123]     The eject module  4  is comprised of the eject unit  13  in the first embodiment modularized. As variations of this eject module  4 , two types, for example, a type provided with only a heating device and a type provided with a heating device and anti-condensation device, may be mentioned.  
         [0124]     In the present embodiment, as shown in  FIG. 8  and  FIG. 9 , the contact module  3  and eject module  4  are provided on the first main frame  10 . This first main frame  10  is formed on its base  101  with a plurality of guide holes  102  at predetermined pitches. As opposed to this, the contact module  3  is provided at the four corners of its bottom surface with a plurality of guide pins  33  sticking out facing downward. The guide pins  33  are provided at intervals of whole multiples of the pitch of the guide holes  102  (in the example shown in  FIG. 8 , a two-fold multiple). Similarly, the eject module  4  is provided at the four corners of its bottom surface with a plurality of guide pins  41  sticking out facing downward. The guide pins  41  are also provided at intervals of whole multiples of the pitch of the guide holes  102  (in the example shown in  FIG. 8 , a four-fold multiple). Further, by fitting the guide pins  33  and  41  into the guide holes  102 , the contact module  3  and eject module  4  are positioned with respect to the first main frame  10 . After this positioning, for example, bolts, clamps, magnetic force, etc. are used to fasten the contact module  3  and eject module  4  to the first main frame  10 .  
         [0125]     Modules of types having different specifications are also fabricated standardized based on the pitch of the guide holes  102  of the first main frame  10 . Further, even when newly producing modules, they are fabricated standardized based on the pitch of the guide holes  102 .  
         [0126]      FIG. 14  is a side view of a holding head module of an XYZ conveyor apparatus in the second embodiment of the present invention, while  FIG. 15A  to  FIG. 15D  are side views of variations of a holding head module.  
         [0127]     The loader module  5  and unloader module  6  are comprised of the loader unit  21  and unloader unit  22  in the first embodiment modularized. XYZ conveyor apparatuses for conveying the DUTs (corresponding to  211  and  221  in  FIG. 5 ) are provided at the modules  5 ,  6 . For this reason, these modules  5  and  6  are suitable for the case where the test time is relatively short and fast loading and unloading are required.  
         [0128]     The XYZ conveyor apparatuses  211 ,  221  provided at the modules  5 ,  6  have movable heads  212 ,  222  able to move in the X-Y-Z directions. The movable heads  212  and  222 , as shown in  FIG. 14 , have a plurality of holding heads  214  able to pick up and hold DUTs by suction pads  215  and a base member  213  to which the plurality of holding heads  214  are attached.  
         [0129]     The base member  213  is provided with connection ports for individually supplying individual holding head modules with electric power, drive power, etc. and a bus line to which I/O controllers of the modules are connected.  
         [0130]     In the present embodiment, the holding heads  214  are submodularized as holding head modules which can be separated from and connected to the XYZ conveyor apparatuses  211  and  221 . As variations of the holding head modules, the types shown in  FIG. 15A  to  FIG. 15D  may be mentioned.  
         [0131]     The variation shown in  FIG. 15A  is a first type  214 A having one or more (in the example shown in  FIG. 15A , one) suction pads  215 . In the example shown in  FIG. 15A , four holding head modules  214 A are bolted to the base member  213 . The variation shown in  FIG. 15B  is a second type  214 B with a large shape (size) of a holding hand  215  for handling large sized DUTs.  
         [0132]     The variation shown in  FIG. 15C  is a third type  214 C using an air cylinder  216  as a buffer mechanism. The variation shown in  FIG. 15D  is a fourth type  214 D using a motor  217  and a rack and pinion mechanism  218  as a buffer mechanism. A holding head module  214 C of the type shown in  FIG. 15C  is low in cost, but inferior in buffering ability, so is suitable for low speed processing. As opposed to this, a holding head module  214 D of the type shown in  FIG. 15D  is high in cost, but is superior in buffering performance, so is suitable for high speed processing. Note that the holding head modules  214 C and  214 D of the third and fourth types have four suction pads  215 .  
         [0133]     By changing to the holding head modules  214 A to  214 C of the above variations in accordance with the size of the DUTs, the test time, etc., it is possible to flexibly configure/change the system configuration without changing the loader module  5  or unloader module  6  as a whole.  
         [0134]     As shown in  FIG. 8  and  FIG. 9 , the loader module  5  and unloader module  6  are provided on a second main frame  20 . This second main frame  20  is formed on its base  201  with a plurality of guide holes  202  at predetermined pitches. As opposed to this, the four corners of the bottom surfaces of the loader module  5  and unloader module  6  are provided with pluralities of guide pins  51 ,  61  sticking out downward. The guide pins  51 ,  61  are provided at intervals of whole multiples of the pitch of the guide holes  202  (in the example shown in  FIG. 8 , both four-fold multiples). Further, by fitting the guide pins  51  and  61  into the guide holes  202 , the loader module  5  and unloader module  6  are positioned with respect to the second main frame. After this positioning, for example, bolts, clamps, magnetic force, etc. are used to fasten the loader module  5  and unloader module  6  to the second main frame  10 .  
         [0135]     Modules of types having different specifications are also fabricated standardized based on the pitch of the guide holes  202  of the second main frame  20 . Further, even when newly producing modules, they are fabricated standardized based on the pitch of the guide holes  202 .  
         [0136]     The stocker module  7  comprises the stocker unit  24  in the first embodiment modularized. In the present embodiment, this is provided inside the second main frame  20 . This stocker module  7  transfers customer trays to and from the loader module  21  and unloader module  22  through an opening (not shown) formed in the base  21 . The stocker module  7  sometimes has to be changed to a different stocker module depending on the type or shape of the customer tray. In this case, since the corresponding stocker module  7  can be changed to in the present invention, the electronic device test apparatus can be made more generally applicable.  
         [0137]     Further, as shown in  FIG. 8  and  FIG. 9 , the first main frame  10  to which the contact module  3  and eject module  4  are fastened and the second main frame  10  to which the loader module  5  and unloader module  6  are fastened are fixed in place. The first main frame  10  is provided with guide pins  103  at the four corners of the surface facing the second main frame. As opposed to this, the second main frame is formed with guide holes  203  at positions facing the guide pins  103 . Further, by fitting the guide pins  102  into the guide holes  202 , the first main frame  10  and the second main frame  20  are positioned together. After this positioning, for example, bolts, clamps, magnetic force, etc. are used for fastening the main frames  10 ,  20 .  
         [0138]      FIG. 16  is a disassembled perspective view of the case mounting a loader/unloader module at the handler shown in  FIG. 8 , while  FIG. 17  is a perspective view of the handler shown in  FIG. 16  assembled.  
         [0139]     In the present embodiment, as shown in  FIG. 16  and  FIG. 17 , a loader module  5 ′ of different specifications from the above modules  5  and  6  is also prepared. This loader module  5 ′, as shown in  FIG. 14  and  FIG. 15 , is comprised of a loader unit  21  and unloader unit  22  formed as an integral module and is designed to use a single XYZ conveyor apparatus for both the loader side and unloader side. Therefore, when the test time is relatively long and a fast loader and unloader are not required, the above-mentioned loader module  5  and unloader module  6  are replaced by the loader module  5 ′.  
         [0140]     This loader module  5 ′ is provided at the four corners of its bottom surface with guide pins  51 ′ at intervals of whole multiples of the pitch of the guide holes  202  (in the example shown in  FIG. 16 , a seven-fold multiple) so as to enable the loader module  5 ′ to be positioned at the second main frame  20 .  
         [0141]      FIG. 18  is a disassembled perspective view of a contact module and eject module in the second embodiment of the present invention, while  FIG. 19  is a front view of the contact module and eject module shown in  FIG. 18 .  
         [0142]     In the handler configured from the modules  3  to  7  in this way, it is necessary to transfer DUTs between the modules. As the method of transferring DUTs among the modules, the method of transferring a test tray  91  carrying the DUTs and the method of transferring the DUTs themselves may be mentioned.  
         [0143]     In the present embodiment, the former method is employed to convey a test tray  91  along the route of the loader module  5 →contact module  3 →eject module  4 →unloader module  6 →loader module  5  for testing the DUTs.  
         [0144]     In the present embodiment, to transfer the test tray  91  between modules, as shown in  FIG. 18  and  FIG. 19 , the front side of the contact module  3  (surface to which the loader module  5  is attached) is formed with an inlet opening  34  through which the test tray  91  is loaded. Further, the front side of the eject module  4  is formed with an outlet opening  42  through which the test tray is unloaded. Further, these openings  34 ,  42  are formed positioned, as shown in  FIG. 19 , based on the guide pins  103  provided at the first main frame  10 . Further, these opening  34 ,  42  are standardized in shape (size).  
         [0145]     While not particularly shown, the loader module  5  is formed with an outlet opening of the same position and shape corresponding to the inlet opening  34  of the contact module  3 . Similarly, the unloader module  6  is also formed with an inlet opening of the same position and shape corresponding to the outlet opening  52  of the eject module  4 .  
         [0146]     Further, as shown in  FIG. 18 , another surface of the contact module  3  (surface to which the eject module  4  is attached) is formed with an outlet opening  35  through which the test tray is unloaded. Further, the eject module  4  is formed with an inlet opening  43  of the same position and shape corresponding to this outlet opening  35 . Further, when assembling the contact module  3  and eject module  4 , the openings  35 ,  43  are communicated. While not particularly illustrated, openings are also formed communicating the unloader module  6  and loader module  5 .  
         [0147]     Further, the modules are provided between them with a belt conveyor (not shown) bridging the communicated openings. This belt conveyor is used to transfer test trays  91  from a prior process (prior module) to a later process (later module). Note that as a mechanism for conveying a test tray  91  between modules, in addition to a belt conveyor, an air cylinder, ball-screw mechanism, or other mechanism may be mentioned.  
         [0148]      FIG. 20  is a schematic perspective view showing the inside of a contact module and eject module in a third embodiment of the present invention, while  8   FIG. 21  is a plan view of the inside of the contact module and eject module shown in  FIG. 22 .  
         [0149]     Next, a third embodiment of the present invention not using test trays, but transferring the DUTs themselves between the modules will be explained. In the third embodiment of the present invention, as shown in  FIG. 20  and  FIG. 21 , for example, a shuttle unit  36  is provided to bridge the contact module  3  and eject module  4 . XYZ conveyor apparatuses  37 ,  44  are provided at its two sides.  
         [0150]     The shuttle unit  36  has a base  361  able to move reciprocatively between the modules  3 ,  4  and shuttles  362  provided attachably/detachably on the base  36 . The base  361 , for example, is comprised of a belt conveyor, air cylinder, ball-screw mechanism, etc. Further, this base  361  is provided with connection ports for individually supplying the shuttles  362  with electric power, drive power, etc. and a bus line to which I/O controllers of the shuttles  362  are connected. The shuttles  362  are formed with pluralities of pockets  362  for holding the DUTs (in the example shown in  FIG. 21 , four). The shuttles  362  are positioned with respect to the base  361  using guide pins etc.  
         [0151]     Further, the DUTs finished by tested at the contact module  3  are moved by the XYZ conveyor apparatus  37  to a shuttle  362 , then the base  361  is moved to the eject module  4 , and the XYZ conveyor apparatus  44  moves the DUTs from the shuttle  36  to the unsoak position, whereby the DUTs are transferred between the modules  3 ,  4 .  
         [0152]     In the present embodiment, in the shuttle unit  36 , the shuttle  362  is modularized. It is therefore possible to switch to another type of shuttle with a different number of pockets  363  or increase the number of the shuttles  362  themselves.  
         [0153]     Note that the shuttle unit  36  of the above configuration is not limited to being provided between the contact module  3  and eject module  4  and may also be provided between the loader module  5  and contact module  3  and between the eject module  4  and unloader module  6 .  
         [0154]     As another method for transfer of DUTs themselves between modules, it is also possible not to go through a shuttle unit  36 , but to make the contact module  3  side XYZ conveyor apparatus  37  move the DUTs to a predetermined position and have the DUTs received by the eject module  4  side XYZ conveyor apparatus  44 .  
         [0155]      FIG. 22  is a disassembled perspective view showing the electrical wiring etc. of the handler according to the second embodiment of the present invention, while  FIG. 23  is a block diagram of the overall configuration of the control system of the handler according to the second embodiment of the present invention.  
         [0156]     As shown in  FIG. 22 , the contact module  3  and eject module  4  are provided with connection panels  38 ,  45 . Further, the first main frame  10  is provided with a main connection panel  104 . Further, the connection panels  38 ,  45  and the main connection panel  104  are connected by power cables, I/O cables, and air pipes, whereby the modules  3 ,  4  are supplied with power or air.  
         [0157]     Similarly, while not particularly shown, the loader module  5 , unloader module  6 , and stocker module  7  are also provided with connection panels. Further, the second main frame  20  is also provided with the main connection panel  204 . Further, the connection panels and main connection panel are connected by the power cables, I/O cables, and air pipes whereby the modules  5  to  7  are supplied with power or air.  
         [0158]     As shown in  FIG. 23 , the modules  3  to  7  have controllers  39  to  79  for controlling the respective modules  3  to  7 . The controllers  39  to  79  are connected through the connection panels and I/O cables to the main control apparatus  105  (central managing means). The main control apparatus  105  centrally manages the controllers  39  to  79 . The main control apparatus  105 , as shown in  FIG. 22 , is provided inside the first main frame  10 .  
         [0159]     The main control apparatus  105  has software for controlling the operations of the modules. By reading out ID data identifying the modules, it becomes possible to apply software corresponding to the individual ID data. Due to this, it becomes possible to immediately apply and utilize this to the formation of the system configuration of electronic device test apparatus for the DUTs.  
         [0160]     Note that the embodiments explained above were described for facilitating understanding of the present invention and were not described for limiting the present invention. Therefore, the elements disclosed in the above embodiments include all design modifications and equivalents falling under the technical scope of the present invention. For example, when a tray which gives/receives the electronic device held to/from outside is identical with the test tray  91  used inside, the stoker module  24  is detached and exchanged for a carrying-in/out module which directly gives and receives the test tray  91  to/from outside. Also when an outside transfer system is exchanged for a system by using a mobile cart (for example, a monorail type, railway type or non-railway type (AGV)), the stocker unit  24  is detached and only exchanged for a carrying-in/out module which gives/receives the test tray  91  to/from the mobile cart. On the other hand, if desiring to return to the carrying-in/out by some workers, it is rapidly able to respond to the changing of the outside transfer by exchanging for the former stocker unit  24  only. Therefore the now existing apparatus are effectively used, also the obsolescence of the apparatus is prevented so that there is a merit of a significant decrease of the equipment cost. Also when a plural apparatus are operated, it is able to exchange for the module of different specifications at the point of production at any time. Whereby, the system configuration of the whole apparatus is organized so that its throughput is optimized. Especially when the variety of the electronic device which is mass-produced (for example memory device) is changed, it is improved the throughput by exchanging of the modules and restructuring the whole apparatus. Also when the apparatus breaks down, it is able to restart in a short time by exchanging the broken module for a module of same specification or by exchanging alternative module of different specification. On the other hand, the broken module is repaired as needed.