Methods and apparatus for determining the state of a...

Details Methods and apparatus for determining the state of a... Methods and apparatus for determining the state of a...

2007-10-09

2007-10-09

Wellington, Andrea (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S126000, C369S275200

Reexamination Certificate

active

10628526

ABSTRACT:
A method and an apparatus for detecting a number of variation in resistance within a material stack in response to a scanning and injection of a non-contacting electron stream into a material stack, the material stack having a first conductive contact layer, a variable resistive layer, a fixed resistive layer, and a second conductive contact layer, and the variations in resistance within the material stack being based on one of a plurality of resistive states of the variable resistive layer. The method also includes generating two magnetic fields within a transformer, the transformer being operatively coupled to the first and second conductive contact layers and generating a differential output signal within the transformer based on the two magnetic fields, the differential output signal being associated with one of the plurality of resistive states.

REFERENCES:
patent: 3750117 (1973-07-01), Chen et al.
patent: 5293781 (1994-03-01), Kaiser et al.
patent: 5473244 (1995-12-01), Libove et al.
patent: 5982568 (1999-11-01), Yamamoto et al.
patent: 6147395 (2000-11-01), Gilgen
patent: 6473388 (2002-10-01), Gibson
patent: 6507552 (2003-01-01), Gibson

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