Abstract: A compact and modularly designed apparatus for testing and burning-in semiconductor devices comprises first and second power supplies and the use of direct current (DC) to DC converters. The first power supply provides a high voltage low amperage power source to drive the devices under test (DUTs), and the second power supply supplies 15 volts and 5 volts to drive the circuitry on the testing equipment. The high voltage and low amperage is supplied to slot boards, and the DC to DC converters alter the voltage and current to digital levels. Supplying high voltage and low amperage power through the system to a location electrically near the DUTs, then converting it with DC to DC converters to power the DUTs, allows for much smaller connectors and for a modularly designed burn-in oven.

Abstract: A compact and modularly designed apparatus for testing and burning-in semiconductor devices comprises first and second power supplies and the use of direct current (DC) to DC converters. The first power supply provides a high voltage low amperage power source to drive the devices under test (DUTs), and the second power supply supplies 15 volts and 5 volts to drive the circuitry on the testing equipment. The high voltage and low amperage is supplied to slot boards, and the DC to DC converters alter the voltage and current to digital levels. Supplying high voltage and low amperage power through the system to a location electrically near the DUTs, then converting it with DC to DC converters to power the DUTs, allows for much smaller connectors and for a modularly designed burn-in oven.

Abstract: A truck trailer door safety door stop is provided for preventing a truck trailer door from accidentally falling closed. The door stop may be retrofitted onto a conventional truck trailer door of the roll up type including a plurality of hinged panels which ride along rails by means of roller wheels. The door stop includes a glide member for guiding a bottom panel of the roll up door along the rail without engagement therewith. When the door is in a fully opened position, the disengaged bottom panel is pulled out of alignment with the rail and separated therefrom by means of a spring. In response to a sudden forward movement of the truck, which would normally cause such a door to accidentally close, the door will be forced directly rearward and be prevented from falling down the rail. A guide bar may be provided for supporting the bottom panel in a positive lock open position.

Abstract: A compact and modularly designed apparatus for testing and burning-in semiconductor devices comprises first and second power supplies and the use of direct current (DC) to DC converters. The first power supply provides high voltage low amperage power to drive the devices under test (DUTs), and the second power supply supplies 15 volts and 5 volts to drive the circuitry on the testing equipment. The high voltage and low amperage is supplied to slot boards, and the DC to DC converters alter the voltage and current to digital levels. Supplying high voltage and low amperage power through the system to a location electrically near the DUTs, then converting it with DC to DC converters to power the DUTs, allows for much smaller connectors and for a modularly designed burn-in oven.