Patent ID: 7948255
Filing Date: 2011-05-24
Classification: G01R,H01L

Abstract:
1. A test handler comprising: a first transfer for gripping a first user tray that has therein a plurality of target devices to be tested, and then putting the first user tray onto one of loading plates; a second transfer for gripping a second user tray from one of the loading plates after the second user tray is made empty by transferring a plurality of target devices therein to a test tray, and then putting the second user tray onto one of unloading plates; and a third transfer for gripping a third user tray from one of the unloading plates after a plurality of tested devices are loaded therein, and then stacking the third user tray in one of stackers, wherein the first transfer, the second transfer and the third transfer can be independently moved in the horizontal direction, and wherein the first transfer waits near the loading plates after gripping the first user tray having therein a plurality of target devices to be tested, while the second transfer grips the second user tray, having been made empty, from one of the loading plates, and then the first transfer puts the first user tray onto the one of the loading plates after second transfer finishes gripping the second user tray.