Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1989-12-29
1990-12-04
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324 725, 324158P, 437 8, G01R 102, G01R 104
Patent
active
049756370
ABSTRACT:
A method and apparatus are disclosed for testing integrated circuit devices. A ferromagnetic test substrate is manufactured, utilizing a process substantially similar to the process utilized to create the integrated circuit devices to be tested, such that the test substrate and the integrated circuit devices are thermally matched. The test substrate preferably includes a plurality of electrical contact points which correspond to a plurality of electrical contact points within the integrated circuit device. By aligning the ferromagnetic test substrate and integrated circuit device to be tested in a position proximate to an electromagnet and selectively energizing the electromagnet, the electrical contact points within the ferromagnetic test substrate are magnetically urged into contact with the electrical contact points within the integrated circuit device. An integrated circuit device tester is then electrically coupled to the ferromagnetic test substrate and utilized to test each integrated circuit device during this magnetically induced electrical connection. In one embodiment of the present invention, a second electromagnet having a magnetic polarity opposite that of the first electromagnet is provided and positioned opposite the first electromagnet such that upon energization the electromagnets are urged together, further ensuring electrical contact between the test substrate and the integrated circuit device. In this embodiment, a flexible cushion is provided to equally distribute the pressure between the two electromagnets.
REFERENCES:
patent: 4087747 (1978-05-01), Deegen et al.
patent: 4270109 (1981-05-01), Riessland et al.
"Film Supported Probe for the AC Pulse Testing of Integrated Circuits", by Dill et al., vol. 10, #10, 3/68, pp. 1466-1467.
Frankeny Richard F.
Hermann Karl
Burns William
Dillon Andrew J.
Eisenzopf Reinhard J.
International Business Machines - Corporation
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