Congruent state changeable optical memory material and device
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United States of America Patent
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Jul 7, 1992
Grant Date -
N/A
app pub date -
Feb 15, 1991
filing date -
Feb 15, 1991
priority date (Note) -
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Abstract
A state changeable memory alloy and device employing same. The memory alloy is capable of changing from a first state to a second state in response to the input of energy, such as projected optical beam energy, electrical energy or thermal energy. The alloy has a first detectable characteristic when in the first state and a second detectable characteristic when in the second state. It is further characterized in that the first state comprises a single phase, and the second state comprises either: (1) a single phase having the same composition as the first phase or (2) a plurality of phases which have substantially similar crystallization temperatures and kinetics.
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