Abstract:
A carrier module for a semiconductor device handler, in which grooves for flow of cooling fluid are formed in a seating surface of the carrier module for the semiconductor device. The grooves improve cooling efficiency by forcing the cooling fluid sprayed from a test temperature deviation compensating system onto the carrier module to spread throughout substantially an entire surface of the semiconductor device, and to remain in the carrier module for a period of time before being discharged.

Description:
BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The invention relates to a carrier module configured to be fitted to a test tray in a semiconductor device handler. 
   2. Background of the Related Art 
   In general, both memory and non-memory semiconductor devices, or modular ICs with semiconductor devices arranged on a substrate to form a circuit, are subjected to various tests after fabrication but prior to shipment. The semiconductor device handler (hereafter referred to as “handler”) is an apparatus for automatic testing of semiconductor devices, modular ICs, and the like. The handler carries out a test according to the following process. 
   First, a worker loads trays of semiconductor devices or modular ICs to be tested onto a loading stacker of the handler. The semiconductor devices or modular ICs are then loaded on test trays and transported to a test site. At the test site, leads of the semiconductor device are electrically connected to a test socket and tested. Once testing is complete, the semiconductor devices are removed from the test trays and loaded on user trays based on test results, to classify the semiconductor devices. 
   In general, the handlers have a system for carrying out not only general performance tests at room temperature, but also high temperature or low temperature tests to determine if the semiconductor devices or the modular ICs can perform normally under extreme temperature conditions. To perform such tests, an extreme high or low temperature environment is formed by providing an electric heater, or a liquefied gas spray system within an enclosed chamber at the test site. 
   However, carrying out a temperature test of a semiconductor device using a handler poses a problem. The semiconductor device itself generates heat while it is electrically connected to the test socket which impedes carrying out the test at an exact preset temperature. This is a problem which must be solved, both in the test environment and actual application environment, as semiconductor devices become smaller and packing densities increase. 
   For example, in a high temperature test, if a user sets the temperature inside the chamber to 80° C. for the test, the test can be carried out at the set temperature of 80° C. if there is no additional heat generated by the semiconductor device itself. However, if heat is generated by the semiconductor device during the test, causing a test temperature deviation of, for example, approximately 15° C., the test is actually carried out at 95° C. In this case, the test of the semiconductor device is carried out at a temperature higher than the set temperature, resulting in decreased yield and reliability as the test has not been conducted at the exact set temperature. 
   To cope with this, there has been research into a system for compensating for test temperature deviation in which a cooling fluid formed by mixing a liquefied gas, such as liquefied nitrogen, and dry air is sprayed directly onto the semiconductor device from one side of the semiconductor device in order to test the semiconductor device at an exact temperature or within an exact temperature range. However, in spraying the cooling fluid onto the semiconductor device, the carrier module structure can impede uniform spreading of the sprayed cooling fluid over an entire surface of the semiconductor device, which decreases efficiency of the test temperature deviation compensation system. 
     FIGS. 1 to 3  show a related art carrier module  10  with a carrier body  11 , in this case rectangular and formed, for example, of plastic, configured to be held in a test tray, a seating recess  12  in the carrier body  11 , a heat dissipation block  13  that forms a bottom of the seating recess  12  and receives the semiconductor device  20  thereon, and a pair of latches  15  provided at opposite sides of the seating recess  12  that hold the semiconductor device  20  seated on the heat dissipation block  13 . 
   The heat dissipation block  13  is formed of a material with good heat conductivity, for example, a metal such as aluminum, to improve cooling of the semiconductor device  20 . The heat dissipation block  13  has a central pass through hole  14  configured to guide cooling fluid sprayed from a nozzle  30  of a test temperature deviation compensation device (not shown) to the semiconductor device  20 . The heat dissipation block  13  has a plurality of guide ribs  17  formed on a bottom thereof that guide the cooling fluid toward the pass through hole  14  to enhance a heat dissipation effect, and a plurality of air holes  18  at both sides of a lower portion of the carrier body  11  where the guide ribs  17  are formed and configured to discharge the sprayed cooling fluid to outside of the carrier body  11  through both sides of the lower portion of the carrier body  11 . 
   However, the related art carrier module  10  has a problem in that overall cooling efficiency is poor, due to a large difference in cooling performance between a central portion and a periphery of the semiconductor device. This difference in cooling performance is caused by concentration of the cooling fluid, which is passed through the pass through hole  14  in the heat dissipation block  13 , at a central portion of the semiconductor device, as the top surface of the heat dissipation block  13  is flat, and the semiconductor device  20  is seated thereon. 
   Moreover, the direct discharge of the cooling fluid outside of the carrier body  11  through the air holes  18  formed in sides of the carrier body  11  causes a drop in cooling efficiency, as the cooling fluid is discharged before its full cooling capacity has been expended in cooling of the entire heat dissipation block  13 . 
   SUMMARY OF THE INVENTION 
   An object of the invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter. 
   Accordingly, the invention is directed to a test tray configured to carry a plurality of semiconductor devices in a test handler that substantially obviates one or mote of the problems due to limitations and disadvantages of the related art. 
   To achieve these and other advantages and in accordance with the purpose of the invention, as embodied and broadly described, a test tray configured to carry a plurality of semiconductor devices in a test handler is provided, with carrier modules configured to be fitted to the test tray and detachably hold the semiconductor device, the carrier module comprising a carrier body configured to be positioned on a test tray, a device seating part on a top surface of the carrier body configured to receive a semiconductor device, a device seating part on a top surface of the carrier body configured to receive a semiconductor device, at least one holding member configured to detachably hold the semiconductor device on the device seating part, a pass through hole formed in the device seating part configured to pass cooling fluid pass therethrough, and a plurality of guide grooves formed in a surface of the device seating part in fluid communication with the pass through hole and configured to guide cooling fluid, sprayed onto a lower side of the carrier body and passed through the pass through hole, across portions of the surface of the semiconductor device extending to the periphery of the semiconductor device. 
   To achieve these and other advantages and in accordance with the purpose of the invention, as embodied and broadly described, a carrier module is provided for a semiconductor device handler, the carrier module being fitted to a test tray in a semiconductor device handler for detachably holding the semiconductor device, and including a substantially rectangular body for fitting to a test tray, a device seating part formed as a recess in a top surface of the body for seating the semiconductor device, one pair of holding members fitted to opposite sides of the device seating part for detachably holding the semiconductor device seated on the device seating part, a pass through hole formed in the device seating part to pass therethrough, a plurality of guide grooves in a surface of the device seating part the semiconductor device is to be seated thereon opened to the pass through hole, for guiding cooling fluid, sprayed from a lower side of the body and passed through the pass through hole, to an entire surface of the semiconductor device, and a plurality of guide ribs formed as one unit with the body extended from a lower part of the body vertically, for guiding the cooling fluid sprayed from a lower side of the body toward the pass through hole. 
   The plurality of guide ribs may be in the form of a hexahedron with an opened lower surface, to surround a part having the pass through hole formed therein. 
   Thus, the carrier module for a semiconductor device handler of the invention can improve a cooling performance and make temperature control easy because the cooling fluid sprayed to the carrier module flows over the surface of the semiconductor device to cool down the semiconductor device. 
   Moreover, because the cooling fluid sprayed into a space between the guide ribs of the carrier module is guided to the pass through hole while the cooling fluid stays in the space between the guide ribs, improved cooling performance can be provided in comparison to the related art carrier module. 
   Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and advantages of the invention may be realized and attained as particularly pointed out in the appended claims. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The invention will be described in detail with reference to the following drawings in which like reference numerals refer to like elements wherein: 
       FIG. 1  is a perspective view of a related art carrier module for a semiconductor device handler; 
       FIG. 2  is a bottom view of the carrier module in  FIG. 1 ; 
       FIG. 3  is a side view of the carrier module in  FIG. 1 ; 
       FIG. 4  is a schematic view of the test tray and carrier module in accordance with an embodiment of the invention; 
       FIG. 5  is a schematic perspective view of a carrier module in accordance with an embodiment of the invention; 
       FIG. 6  is a schematic bottom view of the carrier module of  FIG. 5 ; and 
       FIG. 7  is a schematic side view of the carrier module of  FIG. 5 . 
   

   DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
   Reference will now be made in detail to the embodiments of the invention, examples of which are illustrated in the accompanying drawings  FIGS. 4–6 . 
     FIGS. 4–7  show a test tray  200  with a carrier module  100  configured to be fitted to the test tray  200 . The carrier module  100  includes a carrier body  101 . In the embodiment shown in  FIGS. 4–7 , the carrier body  101  is substantially rectangular; however, other shapes may also be appropriate. A device seating plate  102  is positioned on a top surface  101   a  of the carrier body  101  and includes an opening  103  configured to receive a semiconductor device  20  in a central portion thereof The opening  103  in the device seating plate  102  is configured to receive the semiconductor device  20 , together with the top surface  101   a  of the body  101 . For purposes of explanation, a portion of the top surface  101   a  of the body  101  within the opening  103  will be defined as a device seating surface  104 . 
   The carrier body  101  is preferably formed of a material with a good thermal conductivity, for example, a metal such as aluminum. The device seating plate  102  may be formed of, for example, plastic. Alternatively, the device seating plate  102  may be formed of the same material as the body  101 , or as one unit with the body  101 . 
   One or more holding members  106  are provided to detachably hold the semiconductor device seated on the device seating surface  104 . In the embodiment of  FIGS. 4–7 , the holding members  106  are provided at opposite sides of the device seating surface  104 . The holding members  106  may be, for example, a pair of latches  106  and a corresponding pair of latch moving pieces  107 , as in the embodiment of  FIGS. 4–7 . The latches  106  are opened as the latch moving pieces  107  are pressed, and closed as the force pressing the latch moving pieces  107  are removed. 
   A pass through hole  105  is provided in a central portion of the device seating surface  104 . The pass through hole  105  guides the cooling fluid sprayed from the nozzle assembly  30  of the test temperature deviation compensation system toward the semiconductor device  20 . The device seating surface  104  further includes a plurality of guide grooves  108 , each having one end opened to and in communication with the pass through hole  105  and the other end opened to an outside of the body  101 . The guide grooves  108  guide the cooling fluid, passed through the pass through hole  105 , throughout an entire surface of the semiconductor device  20  before being discharged to outside the carrier body  101 . 
   A plurality of guide ribs  109  are provided on a lower portion of the body  101 . The guide ribs  109  may be formed as a unit with the body  101 . The guide ribs  109  guide the cooling fluid sprayed from the nozzle assembly  30  toward the pass through hole  105 . In this embodiment, the plurality of guide ribs  109  form a polyhedral form having an opened bottom surface to surround the pass through hole  105 . However, other shapes may also be appropriate. Accordingly, the escape of the cooling fluid sprayed into the space formed by the guide ribs  109  can be prevented, thereby increasing cooling efficiency. 
   The operation of the foregoing carrier module will be explained as follows. 
   A semiconductor device  20  is seated on the device seating surface  104  on the carrier body  101  of the carrier module  100  and is held by the holding members  106 . After a test tray  200  having the carrier module  100  fitted thereto is transported to the test chamber (not shown), leads on the semiconductor device  20  held by the carrier module  100  are connected to a test socket (not shown), and a test is carried out. 
   A cooling fluid formed of a mixture of dry air and liquefied gas, such as liquefied nitrogen LN 2 , is sprayed from the nozzle assembly  30  of the test temperature deviation compensation system (not shown) toward the carrier module  100 . The cooling fluid is guided to the pass through hole  105  through a space formed by the guide ribs  109  of the carrier module  100 . Since the majority of the cooling fluid introduced into the space formed by the guide ribs  109  is contained within the space formed by the guide ribs  109 , efficiency of the cooling process is enhanced, as the cooling fluid is able to expend its full heat exchange capacity. 
   The cooling fluid passed through the pass through hole  105  is guided to the guide grooves  108 , which are in fluid communication with the pass through hole  105 . The cooling fluid flows toward a periphery of the semiconductor device  20 , cools the semiconductor device  20 , and is discharged to outside of the carrier module  100  through an outer side of the carrier body  101 . 
   As explained above, the test tray with carrier modules for a semiconductor device handler according to the invention has at least the following advantages. 
   The test tray with carrier modules for a semiconductor device handler according to the invention improves the effect of test temperature deviation compensation when a test temperature deviation device sprays cooling fluid onto the semiconductor device during testing of the semiconductor device at a test site of the semiconductor device handler. Since the cooling fluid sprayed from the test temperature deviation compensation system is forced to flow not only to a central portion of the semiconductor device, but also to its periphery, cooling the semiconductor device can be improved. 
   The foregoing embodiments and advantages are merely exemplary and are not to be construed as limiting the invention. The present teaching can be readily applied to other types of apparatuses. The description of the invention is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art. In the claims, means-plus-function clauses are intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures.