Device test apparatus and test method including control unit(s) between controller and test units
First Claim
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1. A test apparatus for independently testing each of a plurality of devices-under-test, comprising:
- a controller for sending test requests for the devices-under-test and receiving test results of the devices-under-test;
a plurality of test units for executing tests on the devices-under-test, respectively, and receiving the test results, each of the test units comprising a processor, a test circuit and an interface;
a plurality of control units, provided between said controller and said test units, for controlling a test process in the respective test units according to the test requests from said controller, and transferring the test results obtained in said test units to said controller; and
wherein said plurality of the control units are operated in parallel to manage the test units.
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Abstract
One test board for executing a test is provided for each of a plurality of DUTs (Devices-Under-Test) such as semiconductor integrated circuits, a multi test board controller for managing these test boards is provided, and a plurality of test boards managed by each multi test board controller are operated in parallel to simultaneously perform independent tests on the respective DUTs.
22 Citations
7 Claims
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1. A test apparatus for independently testing each of a plurality of devices-under-test, comprising:
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a controller for sending test requests for the devices-under-test and receiving test results of the devices-under-test; a plurality of test units for executing tests on the devices-under-test, respectively, and receiving the test results, each of the test units comprising a processor, a test circuit and an interface; a plurality of control units, provided between said controller and said test units, for controlling a test process in the respective test units according to the test requests from said controller, and transferring the test results obtained in said test units to said controller; and wherein said plurality of the control units are operated in parallel to manage the test units. - View Dependent Claims (2)
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3. A test apparatus for independently testing each of a plurality of devices-under-test, comprising:
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a controller for sending test requests for the devices-under-test and receiving test results of the devices-under-test; a plurality of test units for executing tests on the devices-under-test, respectively, and receiving the test results; one or a plurality of control units, provided between said controller and said test units, for controlling a test process in the respective test units according to the test requests from said controller, and transferring the test results obtained in said test units to said controller; and wherein said control unit comprises;
selecting means for generating a selection signal for selecting one test unit among a plurality of test units connected to itself;
means for obtaining test results from the plurality of test units and storing the test results on a test-unit by test-unit basis;
command means for generating a command to the test units corresponding to the test requests from said controller;
means for storing identification data for identifying whether or not the test process in the test units has been completed; and
means for storing a test program to be loaded into each test unit. - View Dependent Claims (4, 5)
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6. A test method for testing a plurality of devices-under-test, comprising:
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providing a controller for sending test requests for the devices-under-test and receiving test results of the devices-under-test; providing one test unit for each of the plurality of devices-under-test, for executing a test on each of the devices-under-test, each of the test units comprising a processor, a test circuit and an interface; providing a control unit for managing a plurality of the test units; operating the plurality of the test units managed by said control unit, in parallel, to simultaneously perform independent tests on the respective devices-under-test; and wherein a plurality of control units for managing the test units are provided, and the plurality of the control units are operated in parallel to manage the test units. - View Dependent Claims (7)
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Specification