Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1990-09-14
1993-02-23
Nguyen, Vinh
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
324158F, 439482, G01R 3102
Patent
active
051893630
ABSTRACT:
A system for testing chips uses a patterned tape having a patterned array of cantilevered contact leads. The tape serves as an interface between the chip under test and a testing unit by providing conductive leads from the I/O terminals on the chip to an off-chip measuring system. The leads on the array may have balls, tips or other shapes on the end to provide contact with the terminals and compensate for height differences. The tape is a single frame or has a series of arrays each positioned around an opening where the chip will be located when a particular pattern is positioned over that chip for test. The pattern on the tape may be the same array or a different array. The tape is indexed to a new pattern when the old one is damaged or no longer needed. Alignment with the chip is by optical sensing and physical pin movement. The tape may have a flap protruding into an aperture and deflectable to provide for planar contact of the leads to the device under test.
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Bregman Mark F.
Hoffman Paul R.
Ledermann Peter G.
Moskowitz Paul A.
Pollak Roger A.
IBM Corporation
Nguyen Vinh
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