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Webopedia term of the day: Phase Change Memory (PCM)

Jun 30, 2010, 20:35 (0 Talkback[s])

"Phase change memory (PCM) is an emerging non-volatile memory technology pioneered by Intel, Numonyx, Samsung and others.

"Last updated: Friday, March 12, 2010

"Abbreviated as PCM, phase change memory is a type of non-volatile memory that is much faster than the common flash memory, and it also uses up to one-half the power. It works by using 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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