Abstract: An apparatus for preheating semiconductor devices including a base having a slanted surface, a frame mounted on the slanted surface, a rotary shaft mounted between support plates of the frame, storage chutes radially provided between rotary disks fixed to the rotary shaft for containing semiconductors to be heated therein, a heater surrounding the storage chutes for heating the storage chutes, a motor for rotating the storage chutes at a predetermined angle, a sensing unit for sensing the supply and discharge of semiconductor devices to and from the storage chutes and the rotational angle of the rotary shaft, and a discharging unit for discharging semiconductor devices from the storage chutes.

Abstract: An apparatus for automatically unloading devices in handler which fills empty sleeves with devices tested from a tester and unloads the sleeves according to characteristics of the devices, and which can selectively actuate a plurality of stopper pins by only one output signal without a plurality of solenoids. The apparatus comprises a multitray having a plurality of tracks which is positioned above a guide shaft of the handler, a plurality of followers, each having a stopper pin for blocking and releasing devices on the tracks, which are mounted on the corresponding tracks respectively, an arm mounted on a slide block slidably mounted on the guide shaft which comes into contact with one of the followers selectively, and an operating plate for raising and lowering the arm and one of the followers by actuation of a cylinder.