phase change memory
Abbreviated as PCM, phase change memory
is a type of non-volatile memory
that is much faster than the common flash memory
, from 500 to 1,000 times faster, and it also uses up to one half the power. Phase change memory uses a semiconductor
alloy that can be changed rapidly between an ordered, crystalline phase
having lower electrical resistance to a disordered, amorphous phase
with much higher electrical resistance. Because no electrical power is required to maintain either phase of the material, so phase-change memory is non-volatile.
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