Wafer burn-in and text employing detachable cartridge
A cartridge ( 10 ) includes a chuck plate ( 12 ) for receiving a wafer ( 74 ) and a probe plate ( 14 ) for establishing electrical contact with the wafer. In use, a mechanical connecting device ( 90 ) locks the chuck plate and the probe plate fixed relative to one another to maintain alignment of the wafer and the probe plate. Preferably, electrical contact with the wafer is established using a probe card ( 50 ) that is movably mounted to the probe plate by means of a plurality of leaf springs ( 52 .) The mechanical connecting device is preferably a kinematic coupling including a male connector ( 94 ) and first and second opposed jaws ( 122, 124 .) Each of the jaws is pivotable from a retracted position in which the male connector can be inserted between the jaws and an engaging position in which the jaws prevent withdrawal of the male connector from between the jaws. The male connector is movable between an extended and a retracted position, and is biased towards the retracted position. This provides a positive clamping force that pulls the chuck and probe plates together when the mechanical connecting device is engaged. To load a wafer into the cartridge, the wafer is placed on the chuck plate, the probe plate is aligned with the wafer, and the chuck plate and the probe plate are locked together. The cartridge can then be removed from the alignment device and placed in a burn-in or test chamber that does not itself require means for aligning the wafer or for providing a probe actuation force.
1. A cartridge for burn-in or test, comprising:
a chuck plate to receive a wafer;
a probe plate to hold a probe card for establishing electrical contact with the wafer;
a mechanical device to lock the chuck plate and the probe plate fixed relative to one another;
a connector block which removably places the cartridge in electrical communication with a burn-in or test system, the connector block comprising a thermal insulating material; and
connectors mounted to the block, wherein the thermal insulating material insulates the connectors from high temperatures.
2. The cartridge of claim 1 , the connector block comprising a high temperature polymer.
3. The cartridge of claim 2 , wherein the high temperature polymer comprises ultem.
4. The cartridge of claim 1 , wherein the chuck plate includes channels for ducting fluid.
5. The cartridge of claim 1 , wherein the chuck plate is in contact with a separate plate having fluid channels formed therein.
6. The cartridge of claim 1 , wherein the chuck plate includes cartridge heaters.
7. The cartridge of claim 6 , wherein the connector block includes connectors for power for cartridge heaters included by the chuck plate.
8. The cartridge of claim 1 , wherein the chuck plate includes a temperature sensor.
9. The cartridge of claim 1 , wherein the chuck plate comprises a high thermal conductivity material.
10. The cartridge of claim 1 , wherein the cluck plate comprises aluminum.
11. The cartridge of claim 1 , wherein the chuck plate is integrally formed from a single piece of material.
12. A cartridge for burn-in or test, comprising:
a chuck plate to receive a wafer;
a probe plate to hold a probe card for establishing electrical contact with the wafer;
a mechanical device to lock the chuck plate and the probe plate fixed relative to one another;
a connector block which removably places the cartridge in electrical communication with a burn-in or test system;
means for thermally isolating the connector block from the probe plate; and
a flange located at an end of the probe plate near the connector.
13. The cartridge of claim 12 , including a seal mounted to the flange around the connector block, the seal positioned to seal against an aperture in a wall of a burn-in chamber.
14. A cartridge for burn-in or test, comprising:
a chuck plate to receive a wafer;
a probe plate to hold a probe card for establishing electrical contact with the wafer;
a mechanical device to lock the chuck plate and the probe plate fixed relative to one another;
a connector block which removably places the cartridge in electrical communication with a burn-in or test system; and
means for thermally isolating the connector block from the probe plate;
wherein the chuck plate includes portions from which metal has been removed so as to achieve a desired effective thermal conductivity.
15. A cartridge for burn-in or test, comprising:
a chuck plate to receive a wafer;
a probe plate to hold a probe card for establishing electrical contact with the wafer;
a mechanical device to lock the chuck plate and the probe plate fixed relative to one another;
a connector block which removably places the cartridge in electrical communication with a burn-in or test system; and
means for thermally isolating the connector block from the probe plate;
wherein the chuck plate includes a pedestal upon which the wafer may be positioned, and the pedestal includes grooves parallel to an upper surface of the pedestal.