摘要 |
PURPOSE: A method for testing a device of a horizontal handler is provided, which performs a device loading and unloading at the same time toward a test site while loading and unloading a device toward a loading buffer and an unloading buffer by constituting a pair of test pickers. CONSTITUTION: According to the method, a picker located in a test site descends and performs a test of a device while a loading picker absorbs a device from a customer tray and transports it to a loading buffer(S1), and at the same time another picker descends and unloads the test-completed device in an unloading buffer. The picker having unloaded the test-completed device in the unloading buffer absorbs the device placed in the loading buffer while the unloading picker unloads the device placed in the unloading buffer. While the loading buffer and the unloading buffer are restored to their initial states(S5), and if the test is completed and the picker located in the test site is elevated to a top dead center, a 180 degree rotation operation of the picker is performed continuously(S6). |