Patents Assigned to EJ Systems, Inc.
  • Burn-in module
    Patent number: 5420521
    Abstract: A temperature controller to accurately control the temperature of a device under test (DUT) including a heat exchanger in heat exchange relationship with the DUT. A temperature sensor is received within the heat exchanger and is thermally isolated therefrom. This temperature sensor measures the temperature of the DUT. A second temperature sensor is received within the heat exchanger and measures the temperature of the heat exchanger. The temperature of the DUT is based on temperature readings from both of the sensors.
    Type: Grant
    Filed: March 19, 1993
    Date of Patent: May 30, 1995
    Assignee: EJ Systems, Inc.
    Inventor: Elmer R. Jones
  • Thermal control system for a semi-conductor burn-in
    Patent number: 5315240
    Abstract: A temperature controller to accurately control the temperature of a device under test (DUT) a heat exchanger in heat exchange relationship with the DUT. A temperature sensor is received within the heat exchange device and thermally isolated therefrom. This temperature sensor measures the temperature of the DUT. A second temperature sensor is received within the heat exchange device and measures the temperature of the heat exchange device. The temperature of the DUT is based on temperature readings from both the sensors.
    Type: Grant
    Filed: October 27, 1992
    Date of Patent: May 24, 1994
    Assignee: EJ Systems, Inc.
    Inventor: Elmer R. Jones
  • Thermal control system for a semi-conductor burn-in
    Patent number: 5164661
    Abstract: An electronic component burn-in thermal control system which accurately and independently controls device case temperature with close-loop conductive heating is provided. A heat exchange device adapted to be placed in heat transfer relationship with the electronic component has a temperature profile different from that of the electronic component.
    Type: Grant
    Filed: May 31, 1991
    Date of Patent: November 17, 1992
    Assignee: EJ Systems, Inc.
    Inventor: Elmer R. Jones
  • Burn-in tower
    Patent number: 5126656
    Abstract: A burn-in tower having a skeletal frame which defines an outer wall is rotatably secured to a fixed base. A plurality of DUT positions are provided on the surface of the tower. Each DUT position comprises a thermal conductive module and a DUT socket assembly which are releasably engaged on to the other. The temperature of the DUT at each DUT position is controlled independently. The load applied to the DUT at each position may be the same or different. The tower is used at ambient temperatures. In a preferred embodiment, DUT mother boards which contain the driver electronics define the surface or walls of the tower.
    Type: Grant
    Filed: May 31, 1991
    Date of Patent: June 30, 1992
    Assignee: EJ Systems, Inc.
    Inventor: Elmer R. Jones